Skip to content
MarketHOT
中文
← Latest news

COLUMBIA FUNDS SERIES TRUST (0001097519) (Filer)

SEC · EDGAR 财务披露 · November 3, 2026 at 11:30 AM ET

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF REGISTERED

MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-09645

Columbia Funds Series Trust

(Exact name of registrant as specified in charter)

290 Congress Street

Boston, MA 02210

(Address of principal executive offices) (Zip code)

Michael G. Clarke

c/o Columbia Management Investment Advisers, LLC

290 Congress Street

Boston, MA 02210

Ryan C. Larrenaga, Esq.

c/o Columbia Management Investment Advisers, LLC

290 Congress Street

Boston, MA 02210

(Name and address of agent for service)

Registrant’s telephone number, including area code: (800) 345-6611

Date of fiscal year end: Last Day of February

Date of reporting period: August 31, 2026


Item 1. Reports to Stockholders.

Columbia Convertible Securities Fund

Class A | PACIX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Convertible Securities Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class A

$57

1.08%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,731,833,120

Total number of portfolio holdings

125

Portfolio turnover for the reporting period

106%

Columbia Convertible Securities Fund | Class A | SSR134-01_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Alphabet, Inc. 6.250%

3.1%

Alphabet, Inc. 6.250%

3.0%

Boeing Co. (The) 6.000%

1.9%

Wells Fargo & Co. 7.500%

1.9%

NextEra Energy, Inc. 7.375%

1.8%

Live Nation Entertainment, Inc. 2.875% 01/15/2030

1.8%

Bank of America Corp. 7.250%

1.8%

ON Semiconductor Corp. 0.500% 03/01/2029

1.7%

Western Digital Corp.

1.4%

Microchip Technology, Inc. 0.000% 02/15/2030

1.4%

Asset Categories

Table Summary

Convertible Bonds

73.9%

Convertible Preferred Stocks

21.0%

Common Stocks

2.8%

Other

1.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Convertible Securities Fund | Class A | SSR134-01_(10/26) |

Columbia Convertible Securities Fund

Class C | PHIKX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Convertible Securities Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class C

$97

1.83%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,731,833,120

Total number of portfolio holdings

125

Portfolio turnover for the reporting period

106%

Columbia Convertible Securities Fund | Class C | SSR134-04_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Alphabet, Inc. 6.250%

3.1%

Alphabet, Inc. 6.250%

3.0%

Boeing Co. (The) 6.000%

1.9%

Wells Fargo & Co. 7.500%

1.9%

NextEra Energy, Inc. 7.375%

1.8%

Live Nation Entertainment, Inc. 2.875% 01/15/2030

1.8%

Bank of America Corp. 7.250%

1.8%

ON Semiconductor Corp. 0.500% 03/01/2029

1.7%

Western Digital Corp.

1.4%

Microchip Technology, Inc. 0.000% 02/15/2030

1.4%

Asset Categories

Table Summary

Convertible Bonds

73.9%

Convertible Preferred Stocks

21.0%

Common Stocks

2.8%

Other

1.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Convertible Securities Fund | Class C | SSR134-04_(10/26) |

Columbia Convertible Securities Fund

Institutional Class | NCIAX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Convertible Securities Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional Class

$44

0.83%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,731,833,120

Total number of portfolio holdings

125

Portfolio turnover for the reporting period

106%

Columbia Convertible Securities Fund | Institutional Class | SSR134-08_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Alphabet, Inc. 6.250%

3.1%

Alphabet, Inc. 6.250%

3.0%

Boeing Co. (The) 6.000%

1.9%

Wells Fargo & Co. 7.500%

1.9%

NextEra Energy, Inc. 7.375%

1.8%

Live Nation Entertainment, Inc. 2.875% 01/15/2030

1.8%

Bank of America Corp. 7.250%

1.8%

ON Semiconductor Corp. 0.500% 03/01/2029

1.7%

Western Digital Corp.

1.4%

Microchip Technology, Inc. 0.000% 02/15/2030

1.4%

Asset Categories

Table Summary

Convertible Bonds

73.9%

Convertible Preferred Stocks

21.0%

Common Stocks

2.8%

Other

1.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Convertible Securities Fund | Institutional Class | SSR134-08_(10/26) |

Columbia Convertible Securities Fund

Institutional 2 Class | COCRX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Convertible Securities Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 2 Class

$42

0.79%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,731,833,120

Total number of portfolio holdings

125

Portfolio turnover for the reporting period

106%

Columbia Convertible Securities Fund | Institutional 2 Class | SSR134-15_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Alphabet, Inc. 6.250%

3.1%

Alphabet, Inc. 6.250%

3.0%

Boeing Co. (The) 6.000%

1.9%

Wells Fargo & Co. 7.500%

1.9%

NextEra Energy, Inc. 7.375%

1.8%

Live Nation Entertainment, Inc. 2.875% 01/15/2030

1.8%

Bank of America Corp. 7.250%

1.8%

ON Semiconductor Corp. 0.500% 03/01/2029

1.7%

Western Digital Corp.

1.4%

Microchip Technology, Inc. 0.000% 02/15/2030

1.4%

Asset Categories

Table Summary

Convertible Bonds

73.9%

Convertible Preferred Stocks

21.0%

Common Stocks

2.8%

Other

1.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Convertible Securities Fund | Institutional 2 Class | SSR134-15_(10/26) |

Columbia Convertible Securities Fund

Institutional 3 Class | CSFYX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Convertible Securities Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 3 Class

$40

0.75%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,731,833,120

Total number of portfolio holdings

125

Portfolio turnover for the reporting period

106%

Columbia Convertible Securities Fund | Institutional 3 Class | SSR134-17_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Alphabet, Inc. 6.250%

3.1%

Alphabet, Inc. 6.250%

3.0%

Boeing Co. (The) 6.000%

1.9%

Wells Fargo & Co. 7.500%

1.9%

NextEra Energy, Inc. 7.375%

1.8%

Live Nation Entertainment, Inc. 2.875% 01/15/2030

1.8%

Bank of America Corp. 7.250%

1.8%

ON Semiconductor Corp. 0.500% 03/01/2029

1.7%

Western Digital Corp.

1.4%

Microchip Technology, Inc. 0.000% 02/15/2030

1.4%

Asset Categories

Table Summary

Convertible Bonds

73.9%

Convertible Preferred Stocks

21.0%

Common Stocks

2.8%

Other

1.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Convertible Securities Fund | Institutional 3 Class | SSR134-17_(10/26) |

Columbia Convertible Securities Fund

Class S | NCIDX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Convertible Securities Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class S

$44

0.83%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,731,833,120

Total number of portfolio holdings

125

Portfolio turnover for the reporting period

106%

Columbia Convertible Securities Fund | Class S | SSR134-16_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Alphabet, Inc. 6.250%

3.1%

Alphabet, Inc. 6.250%

3.0%

Boeing Co. (The) 6.000%

1.9%

Wells Fargo & Co. 7.500%

1.9%

NextEra Energy, Inc. 7.375%

1.8%

Live Nation Entertainment, Inc. 2.875% 01/15/2030

1.8%

Bank of America Corp. 7.250%

1.8%

ON Semiconductor Corp. 0.500% 03/01/2029

1.7%

Western Digital Corp.

1.4%

Microchip Technology, Inc. 0.000% 02/15/2030

1.4%

Asset Categories

Table Summary

Convertible Bonds

73.9%

Convertible Preferred Stocks

21.0%

Common Stocks

2.8%

Other

1.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Convertible Securities Fund | Class S | SSR134-16_(10/26) |

Columbia Cornerstone Equity Fund

Class A | NSGAX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Cornerstone Equity Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class A

$48

0.90%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,483,501,188

Total number of portfolio holdings

59

Portfolio turnover for the reporting period

40%

Columbia Cornerstone Equity Fund | Class A | SSR172-01_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

9.2%

Apple, Inc.

6.0%

Microsoft Corp.

5.1%

Alphabet, Inc., Class C

4.9%

Amazon.com, Inc.

3.9%

Broadcom, Inc.

3.6%

Micron Technology, Inc.

2.9%

JPMorgan Chase & Co.

2.5%

Meta Platforms, Inc., Class A

2.4%

MasterCard, Inc., Class A

2.4%

Asset Categories

Table Summary

Common Stocks

99.7%

Other

0.3%

Equity Sector Allocation

Table Summary

Information Technology

36.5%

Financials

12.4%

Health Care

11.0%

Industrials

9.8%

Consumer Discretionary

8.6%

Communication Services

8.2%

Consumer Staples

4.8%

Utilities

3.9%

Energy

2.8%

Real Estate

1.7%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Cornerstone Equity Fund | Class A | SSR172-01_(10/26) |

Columbia Cornerstone Equity Fund

Class C | NSGCX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Cornerstone Equity Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class C

$89

1.65%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,483,501,188

Total number of portfolio holdings

59

Portfolio turnover for the reporting period

40%

Columbia Cornerstone Equity Fund | Class C | SSR172-04_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

9.2%

Apple, Inc.

6.0%

Microsoft Corp.

5.1%

Alphabet, Inc., Class C

4.9%

Amazon.com, Inc.

3.9%

Broadcom, Inc.

3.6%

Micron Technology, Inc.

2.9%

JPMorgan Chase & Co.

2.5%

Meta Platforms, Inc., Class A

2.4%

MasterCard, Inc., Class A

2.4%

Asset Categories

Table Summary

Common Stocks

99.7%

Other

0.3%

Equity Sector Allocation

Table Summary

Information Technology

36.5%

Financials

12.4%

Health Care

11.0%

Industrials

9.8%

Consumer Discretionary

8.6%

Communication Services

8.2%

Consumer Staples

4.8%

Utilities

3.9%

Energy

2.8%

Real Estate

1.7%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Cornerstone Equity Fund | Class C | SSR172-04_(10/26) |

Columbia Cornerstone Equity Fund

Institutional Class | NSEPX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Cornerstone Equity Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional Class

$35

0.65%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,483,501,188

Total number of portfolio holdings

59

Portfolio turnover for the reporting period

40%

Columbia Cornerstone Equity Fund | Institutional Class | SSR172-08_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

9.2%

Apple, Inc.

6.0%

Microsoft Corp.

5.1%

Alphabet, Inc., Class C

4.9%

Amazon.com, Inc.

3.9%

Broadcom, Inc.

3.6%

Micron Technology, Inc.

2.9%

JPMorgan Chase & Co.

2.5%

Meta Platforms, Inc., Class A

2.4%

MasterCard, Inc., Class A

2.4%

Asset Categories

Table Summary

Common Stocks

99.7%

Other

0.3%

Equity Sector Allocation

Table Summary

Information Technology

36.5%

Financials

12.4%

Health Care

11.0%

Industrials

9.8%

Consumer Discretionary

8.6%

Communication Services

8.2%

Consumer Staples

4.8%

Utilities

3.9%

Energy

2.8%

Real Estate

1.7%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Cornerstone Equity Fund | Institutional Class | SSR172-08_(10/26) |

Columbia Cornerstone Equity Fund

Institutional 2 Class | CLCRX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Cornerstone Equity Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 2 Class

$32

0.59%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,483,501,188

Total number of portfolio holdings

59

Portfolio turnover for the reporting period

40%

Columbia Cornerstone Equity Fund | Institutional 2 Class | SSR172-15_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

9.2%

Apple, Inc.

6.0%

Microsoft Corp.

5.1%

Alphabet, Inc., Class C

4.9%

Amazon.com, Inc.

3.9%

Broadcom, Inc.

3.6%

Micron Technology, Inc.

2.9%

JPMorgan Chase & Co.

2.5%

Meta Platforms, Inc., Class A

2.4%

MasterCard, Inc., Class A

2.4%

Asset Categories

Table Summary

Common Stocks

99.7%

Other

0.3%

Equity Sector Allocation

Table Summary

Information Technology

36.5%

Financials

12.4%

Health Care

11.0%

Industrials

9.8%

Consumer Discretionary

8.6%

Communication Services

8.2%

Consumer Staples

4.8%

Utilities

3.9%

Energy

2.8%

Real Estate

1.7%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Cornerstone Equity Fund | Institutional 2 Class | SSR172-15_(10/26) |

Columbia Cornerstone Equity Fund

Institutional 3 Class | CLEYX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Cornerstone Equity Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 3 Class

$29

0.54%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,483,501,188

Total number of portfolio holdings

59

Portfolio turnover for the reporting period

40%

Columbia Cornerstone Equity Fund | Institutional 3 Class | SSR172-17_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

9.2%

Apple, Inc.

6.0%

Microsoft Corp.

5.1%

Alphabet, Inc., Class C

4.9%

Amazon.com, Inc.

3.9%

Broadcom, Inc.

3.6%

Micron Technology, Inc.

2.9%

JPMorgan Chase & Co.

2.5%

Meta Platforms, Inc., Class A

2.4%

MasterCard, Inc., Class A

2.4%

Asset Categories

Table Summary

Common Stocks

99.7%

Other

0.3%

Equity Sector Allocation

Table Summary

Information Technology

36.5%

Financials

12.4%

Health Care

11.0%

Industrials

9.8%

Consumer Discretionary

8.6%

Communication Services

8.2%

Consumer Staples

4.8%

Utilities

3.9%

Energy

2.8%

Real Estate

1.7%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Cornerstone Equity Fund | Institutional 3 Class | SSR172-17_(10/26) |

Columbia Cornerstone Equity Fund

Class S | NSEAX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Cornerstone Equity Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class S

$35

0.65%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,483,501,188

Total number of portfolio holdings

59

Portfolio turnover for the reporting period

40%

Columbia Cornerstone Equity Fund | Class S | SSR172-16_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

9.2%

Apple, Inc.

6.0%

Microsoft Corp.

5.1%

Alphabet, Inc., Class C

4.9%

Amazon.com, Inc.

3.9%

Broadcom, Inc.

3.6%

Micron Technology, Inc.

2.9%

JPMorgan Chase & Co.

2.5%

Meta Platforms, Inc., Class A

2.4%

MasterCard, Inc., Class A

2.4%

Asset Categories

Table Summary

Common Stocks

99.7%

Other

0.3%

Equity Sector Allocation

Table Summary

Information Technology

36.5%

Financials

12.4%

Health Care

11.0%

Industrials

9.8%

Consumer Discretionary

8.6%

Communication Services

8.2%

Consumer Staples

4.8%

Utilities

3.9%

Energy

2.8%

Real Estate

1.7%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Cornerstone Equity Fund | Class S | SSR172-16_(10/26) |

Columbia Large Cap Enhanced Core Fund

Class A | NMIAX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Enhanced Core Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class A

$45

0.83%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$496,676,814

Total number of portfolio holdings

107

Portfolio turnover for the reporting period

49%

Columbia Large Cap Enhanced Core Fund | Class A | SSR173-01_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

8.6%

Apple, Inc.

7.6%

Alphabet, Inc., Class A

5.9%

Microsoft Corp.

5.6%

Amazon.com, Inc.

3.3%

Broadcom, Inc.

2.7%

Meta Platforms, Inc., Class A

2.5%

Micron Technology, Inc.

1.7%

ExxonMobil Holdings Corp.

1.4%

MasterCard, Inc., Class A

1.4%

Asset Categories

Table Summary

Common Stocks

99.0%

Other

1.0%

Equity Sector Allocation

Table Summary

Information Technology

37.6%

Financials

12.1%

Communication Services

9.0%

Health Care

9.0%

Consumer Discretionary

8.8%

Industrials

8.3%

Consumer Staples

4.4%

Energy

3.6%

Materials

2.2%

Utilities

2.1%

Other

1.9%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Enhanced Core Fund | Class A | SSR173-01_(10/26) |

Columbia Large Cap Enhanced Core Fund

Institutional Class | NMIMX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Enhanced Core Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional Class

$31

0.58%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$496,676,814

Total number of portfolio holdings

107

Portfolio turnover for the reporting period

49%

Columbia Large Cap Enhanced Core Fund | Institutional Class | SSR173-08_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

8.6%

Apple, Inc.

7.6%

Alphabet, Inc., Class A

5.9%

Microsoft Corp.

5.6%

Amazon.com, Inc.

3.3%

Broadcom, Inc.

2.7%

Meta Platforms, Inc., Class A

2.5%

Micron Technology, Inc.

1.7%

ExxonMobil Holdings Corp.

1.4%

MasterCard, Inc., Class A

1.4%

Asset Categories

Table Summary

Common Stocks

99.0%

Other

1.0%

Equity Sector Allocation

Table Summary

Information Technology

37.6%

Financials

12.1%

Communication Services

9.0%

Health Care

9.0%

Consumer Discretionary

8.8%

Industrials

8.3%

Consumer Staples

4.4%

Energy

3.6%

Materials

2.2%

Utilities

2.1%

Other

1.9%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Enhanced Core Fund | Institutional Class | SSR173-08_(10/26) |

Columbia Large Cap Enhanced Core Fund

Institutional 3 Class | CECYX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Enhanced Core Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 3 Class

$22

0.41%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$496,676,814

Total number of portfolio holdings

107

Portfolio turnover for the reporting period

49%

Columbia Large Cap Enhanced Core Fund | Institutional 3 Class | SSR173-17_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

8.6%

Apple, Inc.

7.6%

Alphabet, Inc., Class A

5.9%

Microsoft Corp.

5.6%

Amazon.com, Inc.

3.3%

Broadcom, Inc.

2.7%

Meta Platforms, Inc., Class A

2.5%

Micron Technology, Inc.

1.7%

ExxonMobil Holdings Corp.

1.4%

MasterCard, Inc., Class A

1.4%

Asset Categories

Table Summary

Common Stocks

99.0%

Other

1.0%

Equity Sector Allocation

Table Summary

Information Technology

37.6%

Financials

12.1%

Communication Services

9.0%

Health Care

9.0%

Consumer Discretionary

8.8%

Industrials

8.3%

Consumer Staples

4.4%

Energy

3.6%

Materials

2.2%

Utilities

2.1%

Other

1.9%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Enhanced Core Fund | Institutional 3 Class | SSR173-17_(10/26) |

Columbia Large Cap Enhanced Core Fund

Class R | CCERX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Enhanced Core Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class R

$58

1.08%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$496,676,814

Total number of portfolio holdings

107

Portfolio turnover for the reporting period

49%

Columbia Large Cap Enhanced Core Fund | Class R | SSR173-12_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

8.6%

Apple, Inc.

7.6%

Alphabet, Inc., Class A

5.9%

Microsoft Corp.

5.6%

Amazon.com, Inc.

3.3%

Broadcom, Inc.

2.7%

Meta Platforms, Inc., Class A

2.5%

Micron Technology, Inc.

1.7%

ExxonMobil Holdings Corp.

1.4%

MasterCard, Inc., Class A

1.4%

Asset Categories

Table Summary

Common Stocks

99.0%

Other

1.0%

Equity Sector Allocation

Table Summary

Information Technology

37.6%

Financials

12.1%

Communication Services

9.0%

Health Care

9.0%

Consumer Discretionary

8.8%

Industrials

8.3%

Consumer Staples

4.4%

Energy

3.6%

Materials

2.2%

Utilities

2.1%

Other

1.9%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Enhanced Core Fund | Class R | SSR173-12_(10/26) |

Columbia Large Cap Enhanced Core Fund

Class S | NMIDX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Enhanced Core Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class S

$31

0.58%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$496,676,814

Total number of portfolio holdings

107

Portfolio turnover for the reporting period

49%

Columbia Large Cap Enhanced Core Fund | Class S | SSR173-16_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

8.6%

Apple, Inc.

7.6%

Alphabet, Inc., Class A

5.9%

Microsoft Corp.

5.6%

Amazon.com, Inc.

3.3%

Broadcom, Inc.

2.7%

Meta Platforms, Inc., Class A

2.5%

Micron Technology, Inc.

1.7%

ExxonMobil Holdings Corp.

1.4%

MasterCard, Inc., Class A

1.4%

Asset Categories

Table Summary

Common Stocks

99.0%

Other

1.0%

Equity Sector Allocation

Table Summary

Information Technology

37.6%

Financials

12.1%

Communication Services

9.0%

Health Care

9.0%

Consumer Discretionary

8.8%

Industrials

8.3%

Consumer Staples

4.4%

Energy

3.6%

Materials

2.2%

Utilities

2.1%

Other

1.9%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Enhanced Core Fund | Class S | SSR173-16_(10/26) |

Columbia Large Cap Growth Opportunity Fund

Class A | NFEAX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Growth Opportunity Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

This report describes changes to the Fund that occurred during the reporting period.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class A

$57

1.04%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,312,121,321

Total number of portfolio holdings

54

Portfolio turnover for the reporting period

26%

Columbia Large Cap Growth Opportunity Fund | Class A | SSR186-01_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

15.1%

Alphabet, Inc., Class A

6.0%

Apple, Inc.

5.9%

Microsoft Corp.

5.6%

Broadcom, Inc.

5.2%

Eli Lilly & Co.

3.7%

Meta Platforms, Inc., Class A

3.7%

Visa, Inc., Class A

3.3%

Micron Technology, Inc.

3.0%

Palo Alto Networks, Inc.

2.7%

Equity Sector Allocation

Table Summary

Information Technology

52.4%

Communication Services

10.9%

Industrials

10.2%

Health Care

9.3%

Consumer Discretionary

8.0%

Financials

5.7%

Consumer Staples

1.9%

Real Estate

1.4%

Information Technology Sub-Industry Allocation 

Table Summary

Semiconductors

25.8%

Systems Software

12.9%

Technology Hardware, Storage & Peripherals

7.9%

Communications Equipment

1.9%

Internet Services & Infrastructure

1.8%

Electronic Components

1.5%

Other

0.5%

Certain Fund Changes 

This is a summary of the changes to the Fund. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature or upon request at 1-800-345-6611.

The Boards of Trustees of Columbia Funds Series Trust and Columbia Funds Series Trust I approved an Agreement and Plan of Reorganization pursuant to which the Fund will transfer all of its assets and liabilities to Columbia Cornerstone Growth Fund (the Acquiring Fund) in exchange for shares of the Acquiring Fund (the Reorganization). The Reorganization is scheduled to be completed on or about November 23, 2026.

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Growth Opportunity Fund | Class A | SSR186-01_(10/26) |

Columbia Large Cap Growth Opportunity Fund

Institutional Class | NFEPX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Growth Opportunity Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

This report describes changes to the Fund that occurred during the reporting period.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional Class

$43

0.79%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,312,121,321

Total number of portfolio holdings

54

Portfolio turnover for the reporting period

26%

Columbia Large Cap Growth Opportunity Fund | Institutional Class | SSR186-08_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

15.1%

Alphabet, Inc., Class A

6.0%

Apple, Inc.

5.9%

Microsoft Corp.

5.6%

Broadcom, Inc.

5.2%

Eli Lilly & Co.

3.7%

Meta Platforms, Inc., Class A

3.7%

Visa, Inc., Class A

3.3%

Micron Technology, Inc.

3.0%

Palo Alto Networks, Inc.

2.7%

Equity Sector Allocation

Table Summary

Information Technology

52.4%

Communication Services

10.9%

Industrials

10.2%

Health Care

9.3%

Consumer Discretionary

8.0%

Financials

5.7%

Consumer Staples

1.9%

Real Estate

1.4%

Information Technology Sub-Industry Allocation 

Table Summary

Semiconductors

25.8%

Systems Software

12.9%

Technology Hardware, Storage & Peripherals

7.9%

Communications Equipment

1.9%

Internet Services & Infrastructure

1.8%

Electronic Components

1.5%

Other

0.5%

Certain Fund Changes 

This is a summary of the changes to the Fund. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature or upon request at 1-800-345-6611.

The Boards of Trustees of Columbia Funds Series Trust and Columbia Funds Series Trust I approved an Agreement and Plan of Reorganization pursuant to which the Fund will transfer all of its assets and liabilities to Columbia Cornerstone Growth Fund (the Acquiring Fund) in exchange for shares of the Acquiring Fund (the Reorganization). The Reorganization is scheduled to be completed on or about November 23, 2026.

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Growth Opportunity Fund | Institutional Class | SSR186-08_(10/26) |

Columbia Large Cap Growth Opportunity Fund

Institutional 2 Class | CADRX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Growth Opportunity Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

This report describes changes to the Fund that occurred during the reporting period.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 2 Class

$40

0.73%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,312,121,321

Total number of portfolio holdings

54

Portfolio turnover for the reporting period

26%

Columbia Large Cap Growth Opportunity Fund | Institutional 2 Class | SSR186-15_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

15.1%

Alphabet, Inc., Class A

6.0%

Apple, Inc.

5.9%

Microsoft Corp.

5.6%

Broadcom, Inc.

5.2%

Eli Lilly & Co.

3.7%

Meta Platforms, Inc., Class A

3.7%

Visa, Inc., Class A

3.3%

Micron Technology, Inc.

3.0%

Palo Alto Networks, Inc.

2.7%

Equity Sector Allocation

Table Summary

Information Technology

52.4%

Communication Services

10.9%

Industrials

10.2%

Health Care

9.3%

Consumer Discretionary

8.0%

Financials

5.7%

Consumer Staples

1.9%

Real Estate

1.4%

Information Technology Sub-Industry Allocation 

Table Summary

Semiconductors

25.8%

Systems Software

12.9%

Technology Hardware, Storage & Peripherals

7.9%

Communications Equipment

1.9%

Internet Services & Infrastructure

1.8%

Electronic Components

1.5%

Other

0.5%

Certain Fund Changes 

This is a summary of the changes to the Fund. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature or upon request at 1-800-345-6611.

The Boards of Trustees of Columbia Funds Series Trust and Columbia Funds Series Trust I approved an Agreement and Plan of Reorganization pursuant to which the Fund will transfer all of its assets and liabilities to Columbia Cornerstone Growth Fund (the Acquiring Fund) in exchange for shares of the Acquiring Fund (the Reorganization). The Reorganization is scheduled to be completed on or about November 23, 2026.

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Growth Opportunity Fund | Institutional 2 Class | SSR186-15_(10/26) |

Columbia Large Cap Growth Opportunity Fund

Institutional 3 Class | CLRYX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Growth Opportunity Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

This report describes changes to the Fund that occurred during the reporting period.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 3 Class

$38

0.69%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,312,121,321

Total number of portfolio holdings

54

Portfolio turnover for the reporting period

26%

Columbia Large Cap Growth Opportunity Fund | Institutional 3 Class | SSR186-17_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

15.1%

Alphabet, Inc., Class A

6.0%

Apple, Inc.

5.9%

Microsoft Corp.

5.6%

Broadcom, Inc.

5.2%

Eli Lilly & Co.

3.7%

Meta Platforms, Inc., Class A

3.7%

Visa, Inc., Class A

3.3%

Micron Technology, Inc.

3.0%

Palo Alto Networks, Inc.

2.7%

Equity Sector Allocation

Table Summary

Information Technology

52.4%

Communication Services

10.9%

Industrials

10.2%

Health Care

9.3%

Consumer Discretionary

8.0%

Financials

5.7%

Consumer Staples

1.9%

Real Estate

1.4%

Information Technology Sub-Industry Allocation 

Table Summary

Semiconductors

25.8%

Systems Software

12.9%

Technology Hardware, Storage & Peripherals

7.9%

Communications Equipment

1.9%

Internet Services & Infrastructure

1.8%

Electronic Components

1.5%

Other

0.5%

Certain Fund Changes 

This is a summary of the changes to the Fund. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature or upon request at 1-800-345-6611.

The Boards of Trustees of Columbia Funds Series Trust and Columbia Funds Series Trust I approved an Agreement and Plan of Reorganization pursuant to which the Fund will transfer all of its assets and liabilities to Columbia Cornerstone Growth Fund (the Acquiring Fund) in exchange for shares of the Acquiring Fund (the Reorganization). The Reorganization is scheduled to be completed on or about November 23, 2026.

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Growth Opportunity Fund | Institutional 3 Class | SSR186-17_(10/26) |

Columbia Large Cap Growth Opportunity Fund

Class R | CLGPX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Growth Opportunity Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

This report describes changes to the Fund that occurred during the reporting period.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class R

$70

1.29%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,312,121,321

Total number of portfolio holdings

54

Portfolio turnover for the reporting period

26%

Columbia Large Cap Growth Opportunity Fund | Class R | SSR186-12_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

15.1%

Alphabet, Inc., Class A

6.0%

Apple, Inc.

5.9%

Microsoft Corp.

5.6%

Broadcom, Inc.

5.2%

Eli Lilly & Co.

3.7%

Meta Platforms, Inc., Class A

3.7%

Visa, Inc., Class A

3.3%

Micron Technology, Inc.

3.0%

Palo Alto Networks, Inc.

2.7%

Equity Sector Allocation

Table Summary

Information Technology

52.4%

Communication Services

10.9%

Industrials

10.2%

Health Care

9.3%

Consumer Discretionary

8.0%

Financials

5.7%

Consumer Staples

1.9%

Real Estate

1.4%

Information Technology Sub-Industry Allocation 

Table Summary

Semiconductors

25.8%

Systems Software

12.9%

Technology Hardware, Storage & Peripherals

7.9%

Communications Equipment

1.9%

Internet Services & Infrastructure

1.8%

Electronic Components

1.5%

Other

0.5%

Certain Fund Changes 

This is a summary of the changes to the Fund. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature or upon request at 1-800-345-6611.

The Boards of Trustees of Columbia Funds Series Trust and Columbia Funds Series Trust I approved an Agreement and Plan of Reorganization pursuant to which the Fund will transfer all of its assets and liabilities to Columbia Cornerstone Growth Fund (the Acquiring Fund) in exchange for shares of the Acquiring Fund (the Reorganization). The Reorganization is scheduled to be completed on or about November 23, 2026.

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Growth Opportunity Fund | Class R | SSR186-12_(10/26) |

Columbia Large Cap Growth Opportunity Fund

Class S | NFEDX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Growth Opportunity Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

This report describes changes to the Fund that occurred during the reporting period.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class S

$43

0.79%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$1,312,121,321

Total number of portfolio holdings

54

Portfolio turnover for the reporting period

26%

Columbia Large Cap Growth Opportunity Fund | Class S | SSR186-16_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

15.1%

Alphabet, Inc., Class A

6.0%

Apple, Inc.

5.9%

Microsoft Corp.

5.6%

Broadcom, Inc.

5.2%

Eli Lilly & Co.

3.7%

Meta Platforms, Inc., Class A

3.7%

Visa, Inc., Class A

3.3%

Micron Technology, Inc.

3.0%

Palo Alto Networks, Inc.

2.7%

Equity Sector Allocation

Table Summary

Information Technology

52.4%

Communication Services

10.9%

Industrials

10.2%

Health Care

9.3%

Consumer Discretionary

8.0%

Financials

5.7%

Consumer Staples

1.9%

Real Estate

1.4%

Information Technology Sub-Industry Allocation 

Table Summary

Semiconductors

25.8%

Systems Software

12.9%

Technology Hardware, Storage & Peripherals

7.9%

Communications Equipment

1.9%

Internet Services & Infrastructure

1.8%

Electronic Components

1.5%

Other

0.5%

Certain Fund Changes 

This is a summary of the changes to the Fund. For more complete information, you may review the Fund’s prospectus, which is available at columbiathreadneedleus.com/resources/literature or upon request at 1-800-345-6611.

The Boards of Trustees of Columbia Funds Series Trust and Columbia Funds Series Trust I approved an Agreement and Plan of Reorganization pursuant to which the Fund will transfer all of its assets and liabilities to Columbia Cornerstone Growth Fund (the Acquiring Fund) in exchange for shares of the Acquiring Fund (the Reorganization). The Reorganization is scheduled to be completed on or about November 23, 2026.

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Growth Opportunity Fund | Class S | SSR186-16_(10/26) |

Columbia Large Cap Index Fund

Class A | NEIAX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Index Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class A

$24

0.45%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$3,013,752,317

Total number of portfolio holdings

507

Portfolio turnover for the reporting period

3%

Columbia Large Cap Index Fund | Class A | SSR175-01_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

8.0%

Apple, Inc.

7.0%

Microsoft Corp.

5.6%

Amazon.com, Inc.

3.8%

Alphabet, Inc., Class A

3.0%

Broadcom, Inc.

2.6%

Alphabet, Inc., Class C

2.4%

Meta Platforms, Inc., Class A

1.9%

Micron Technology, Inc.

1.6%

Tesla, Inc.

1.6%

Asset Categories

Table Summary

Common Stocks

98.9%

Money Market Funds

1.1%

Other

0.0%Footnote Reference*

Footnote Description

Footnote*

Percentage rounds to less than 0.1% or (0.1)%.

Equity Sector Allocation

Table Summary

Information Technology

37.5%

Financials

12.2%

Communication Services

9.4%

Health Care

9.2%

Consumer Discretionary

9.0%

Industrials

8.2%

Consumer Staples

4.4%

Energy

3.4%

Utilities

2.0%

Materials

1.8%

Other

1.8%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Index Fund | Class A | SSR175-01_(10/26) |

Columbia Large Cap Index Fund

Institutional Class | NINDX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Index Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional Class

$11

0.20%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$3,013,752,317

Total number of portfolio holdings

507

Portfolio turnover for the reporting period

3%

Columbia Large Cap Index Fund | Institutional Class | SSR175-08_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

8.0%

Apple, Inc.

7.0%

Microsoft Corp.

5.6%

Amazon.com, Inc.

3.8%

Alphabet, Inc., Class A

3.0%

Broadcom, Inc.

2.6%

Alphabet, Inc., Class C

2.4%

Meta Platforms, Inc., Class A

1.9%

Micron Technology, Inc.

1.6%

Tesla, Inc.

1.6%

Asset Categories

Table Summary

Common Stocks

98.9%

Money Market Funds

1.1%

Other

0.0%Footnote Reference*

Footnote Description

Footnote*

Percentage rounds to less than 0.1% or (0.1)%.

Equity Sector Allocation

Table Summary

Information Technology

37.5%

Financials

12.2%

Communication Services

9.4%

Health Care

9.2%

Consumer Discretionary

9.0%

Industrials

8.2%

Consumer Staples

4.4%

Energy

3.4%

Utilities

2.0%

Materials

1.8%

Other

1.8%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Index Fund | Institutional Class | SSR175-08_(10/26) |

Columbia Large Cap Index Fund

Institutional 2 Class | CLXRX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Index Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 2 Class

$11

0.20%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$3,013,752,317

Total number of portfolio holdings

507

Portfolio turnover for the reporting period

3%

Columbia Large Cap Index Fund | Institutional 2 Class | SSR175-15_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

8.0%

Apple, Inc.

7.0%

Microsoft Corp.

5.6%

Amazon.com, Inc.

3.8%

Alphabet, Inc., Class A

3.0%

Broadcom, Inc.

2.6%

Alphabet, Inc., Class C

2.4%

Meta Platforms, Inc., Class A

1.9%

Micron Technology, Inc.

1.6%

Tesla, Inc.

1.6%

Asset Categories

Table Summary

Common Stocks

98.9%

Money Market Funds

1.1%

Other

0.0%Footnote Reference*

Footnote Description

Footnote*

Percentage rounds to less than 0.1% or (0.1)%.

Equity Sector Allocation

Table Summary

Information Technology

37.5%

Financials

12.2%

Communication Services

9.4%

Health Care

9.2%

Consumer Discretionary

9.0%

Industrials

8.2%

Consumer Staples

4.4%

Energy

3.4%

Utilities

2.0%

Materials

1.8%

Other

1.8%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Index Fund | Institutional 2 Class | SSR175-15_(10/26) |

Columbia Large Cap Index Fund

Institutional 3 Class | CLPYX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Large Cap Index Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 3 Class

$11

0.20%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$3,013,752,317

Total number of portfolio holdings

507

Portfolio turnover for the reporting period

3%

Columbia Large Cap Index Fund | Institutional 3 Class | SSR175-17_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

NVIDIA Corp.

8.0%

Apple, Inc.

7.0%

Microsoft Corp.

5.6%

Amazon.com, Inc.

3.8%

Alphabet, Inc., Class A

3.0%

Broadcom, Inc.

2.6%

Alphabet, Inc., Class C

2.4%

Meta Platforms, Inc., Class A

1.9%

Micron Technology, Inc.

1.6%

Tesla, Inc.

1.6%

Asset Categories

Table Summary

Common Stocks

98.9%

Money Market Funds

1.1%

Other

0.0%Footnote Reference*

Footnote Description

Footnote*

Percentage rounds to less than 0.1% or (0.1)%.

Equity Sector Allocation

Table Summary

Information Technology

37.5%

Financials

12.2%

Communication Services

9.4%

Health Care

9.2%

Consumer Discretionary

9.0%

Industrials

8.2%

Consumer Staples

4.4%

Energy

3.4%

Utilities

2.0%

Materials

1.8%

Other

1.8%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Large Cap Index Fund | Institutional 3 Class | SSR175-17_(10/26) |

Columbia Mid Cap Index Fund

Class A | NTIAX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Mid Cap Index Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class A

$23

0.45%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$2,450,894,159

Total number of portfolio holdings

402

Portfolio turnover for the reporting period

9%

Columbia Mid Cap Index Fund | Class A | SSR196-01_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Twilio, Inc., Class A

1.0%

Illumina, Inc.

0.9%

TechnipFMC PLC

0.9%

Everpure, Inc., Class A

0.8%

Okta, Inc.

0.8%

ATI, Inc.

0.8%

nVent Electric PLC

0.7%

Carpenter Technology Corp.

0.7%

U.S. Foods Holding Corp.

0.6%

Tenet Healthcare Corp.

0.6%

Asset Categories

Table Summary

Common Stocks

98.8%

Money Market Funds

1.2%

Equity Sector Allocation

Table Summary

Industrials

23.6%

Financials

14.8%

Information Technology

14.5%

Health Care

10.3%

Consumer Discretionary

9.8%

Real Estate

6.9%

Materials

5.9%

Energy

5.1%

Consumer Staples

3.3%

Utilities

3.0%

Other

1.6%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Mid Cap Index Fund | Class A | SSR196-01_(10/26) |

Columbia Mid Cap Index Fund

Institutional Class | NMPAX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Mid Cap Index Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional Class

$10

0.20%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$2,450,894,159

Total number of portfolio holdings

402

Portfolio turnover for the reporting period

9%

Columbia Mid Cap Index Fund | Institutional Class | SSR196-08_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Twilio, Inc., Class A

1.0%

Illumina, Inc.

0.9%

TechnipFMC PLC

0.9%

Everpure, Inc., Class A

0.8%

Okta, Inc.

0.8%

ATI, Inc.

0.8%

nVent Electric PLC

0.7%

Carpenter Technology Corp.

0.7%

U.S. Foods Holding Corp.

0.6%

Tenet Healthcare Corp.

0.6%

Asset Categories

Table Summary

Common Stocks

98.8%

Money Market Funds

1.2%

Equity Sector Allocation

Table Summary

Industrials

23.6%

Financials

14.8%

Information Technology

14.5%

Health Care

10.3%

Consumer Discretionary

9.8%

Real Estate

6.9%

Materials

5.9%

Energy

5.1%

Consumer Staples

3.3%

Utilities

3.0%

Other

1.6%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Mid Cap Index Fund | Institutional Class | SSR196-08_(10/26) |

Columbia Mid Cap Index Fund

Institutional 2 Class | CPXRX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Mid Cap Index Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 2 Class

$10

0.20%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$2,450,894,159

Total number of portfolio holdings

402

Portfolio turnover for the reporting period

9%

Columbia Mid Cap Index Fund | Institutional 2 Class | SSR196-15_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Twilio, Inc., Class A

1.0%

Illumina, Inc.

0.9%

TechnipFMC PLC

0.9%

Everpure, Inc., Class A

0.8%

Okta, Inc.

0.8%

ATI, Inc.

0.8%

nVent Electric PLC

0.7%

Carpenter Technology Corp.

0.7%

U.S. Foods Holding Corp.

0.6%

Tenet Healthcare Corp.

0.6%

Asset Categories

Table Summary

Common Stocks

98.8%

Money Market Funds

1.2%

Equity Sector Allocation

Table Summary

Industrials

23.6%

Financials

14.8%

Information Technology

14.5%

Health Care

10.3%

Consumer Discretionary

9.8%

Real Estate

6.9%

Materials

5.9%

Energy

5.1%

Consumer Staples

3.3%

Utilities

3.0%

Other

1.6%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Mid Cap Index Fund | Institutional 2 Class | SSR196-15_(10/26) |

Columbia Mid Cap Index Fund

Institutional 3 Class | CMDYX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Mid Cap Index Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 3 Class

$10

0.20%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$2,450,894,159

Total number of portfolio holdings

402

Portfolio turnover for the reporting period

9%

Columbia Mid Cap Index Fund | Institutional 3 Class | SSR196-17_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Twilio, Inc., Class A

1.0%

Illumina, Inc.

0.9%

TechnipFMC PLC

0.9%

Everpure, Inc., Class A

0.8%

Okta, Inc.

0.8%

ATI, Inc.

0.8%

nVent Electric PLC

0.7%

Carpenter Technology Corp.

0.7%

U.S. Foods Holding Corp.

0.6%

Tenet Healthcare Corp.

0.6%

Asset Categories

Table Summary

Common Stocks

98.8%

Money Market Funds

1.2%

Equity Sector Allocation

Table Summary

Industrials

23.6%

Financials

14.8%

Information Technology

14.5%

Health Care

10.3%

Consumer Discretionary

9.8%

Real Estate

6.9%

Materials

5.9%

Energy

5.1%

Consumer Staples

3.3%

Utilities

3.0%

Other

1.6%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Mid Cap Index Fund | Institutional 3 Class | SSR196-17_(10/26) |

Columbia Overseas Value Fund

Class A | COAVX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Overseas Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class A

$58

1.14%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$6,956,234,058

Total number of portfolio holdings

115

Portfolio turnover for the reporting period

25%

Columbia Overseas Value Fund | Class A | SSR208-01_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Shell PLC

3.6%

Sumitomo Mitsui Financial Group, Inc.

2.5%

AXA SA

2.5%

TotalEnergies SE

2.4%

ING Groep NV

2.3%

BPER Banca SPA

2.2%

Mebuki Financial Group, Inc.

2.2%

ASR Nederland NV

2.2%

Piraeus Bank SA

2.2%

Bank of Ireland Group PLC

2.1%

Equity Sector Allocation

Table Summary

Financials

37.8%

Energy

12.0%

Consumer Staples

11.4%

Materials

7.5%

Industrials

7.4%

Health Care

6.9%

Information Technology

5.7%

Consumer Discretionary

3.9%

Real Estate

2.4%

Utilities

1.7%

Other

1.2%

Geographic Allocation 

Table Summary

Japan

21.5%

United States

12.0%

United Kingdom

7.3%

France

7.2%

Netherlands

5.8%

Canada

5.4%

Germany

4.7%

Hong Kong

4.0%

Italy

3.9%

Australia

3.6%

Other

24.2%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Overseas Value Fund | Class A | SSR208-01_(10/26) |

Columbia Overseas Value Fund

Class C | COCVX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Overseas Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class C

$95

1.89%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$6,956,234,058

Total number of portfolio holdings

115

Portfolio turnover for the reporting period

25%

Columbia Overseas Value Fund | Class C | SSR208-04_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Shell PLC

3.6%

Sumitomo Mitsui Financial Group, Inc.

2.5%

AXA SA

2.5%

TotalEnergies SE

2.4%

ING Groep NV

2.3%

BPER Banca SPA

2.2%

Mebuki Financial Group, Inc.

2.2%

ASR Nederland NV

2.2%

Piraeus Bank SA

2.2%

Bank of Ireland Group PLC

2.1%

Equity Sector Allocation

Table Summary

Financials

37.8%

Energy

12.0%

Consumer Staples

11.4%

Materials

7.5%

Industrials

7.4%

Health Care

6.9%

Information Technology

5.7%

Consumer Discretionary

3.9%

Real Estate

2.4%

Utilities

1.7%

Other

1.2%

Geographic Allocation 

Table Summary

Japan

21.5%

United States

12.0%

United Kingdom

7.3%

France

7.2%

Netherlands

5.8%

Canada

5.4%

Germany

4.7%

Hong Kong

4.0%

Italy

3.9%

Australia

3.6%

Other

24.2%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Overseas Value Fund | Class C | SSR208-04_(10/26) |

Columbia Overseas Value Fund

Institutional Class | COSZX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Overseas Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional Class

$45

0.89%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$6,956,234,058

Total number of portfolio holdings

115

Portfolio turnover for the reporting period

25%

Columbia Overseas Value Fund | Institutional Class | SSR208-08_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Shell PLC

3.6%

Sumitomo Mitsui Financial Group, Inc.

2.5%

AXA SA

2.5%

TotalEnergies SE

2.4%

ING Groep NV

2.3%

BPER Banca SPA

2.2%

Mebuki Financial Group, Inc.

2.2%

ASR Nederland NV

2.2%

Piraeus Bank SA

2.2%

Bank of Ireland Group PLC

2.1%

Equity Sector Allocation

Table Summary

Financials

37.8%

Energy

12.0%

Consumer Staples

11.4%

Materials

7.5%

Industrials

7.4%

Health Care

6.9%

Information Technology

5.7%

Consumer Discretionary

3.9%

Real Estate

2.4%

Utilities

1.7%

Other

1.2%

Geographic Allocation 

Table Summary

Japan

21.5%

United States

12.0%

United Kingdom

7.3%

France

7.2%

Netherlands

5.8%

Canada

5.4%

Germany

4.7%

Hong Kong

4.0%

Italy

3.9%

Australia

3.6%

Other

24.2%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Overseas Value Fund | Institutional Class | SSR208-08_(10/26) |

Columbia Overseas Value Fund

Institutional 2 Class | COSSX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Overseas Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 2 Class

$41

0.81%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$6,956,234,058

Total number of portfolio holdings

115

Portfolio turnover for the reporting period

25%

Columbia Overseas Value Fund | Institutional 2 Class | SSR208-15_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Shell PLC

3.6%

Sumitomo Mitsui Financial Group, Inc.

2.5%

AXA SA

2.5%

TotalEnergies SE

2.4%

ING Groep NV

2.3%

BPER Banca SPA

2.2%

Mebuki Financial Group, Inc.

2.2%

ASR Nederland NV

2.2%

Piraeus Bank SA

2.2%

Bank of Ireland Group PLC

2.1%

Equity Sector Allocation

Table Summary

Financials

37.8%

Energy

12.0%

Consumer Staples

11.4%

Materials

7.5%

Industrials

7.4%

Health Care

6.9%

Information Technology

5.7%

Consumer Discretionary

3.9%

Real Estate

2.4%

Utilities

1.7%

Other

1.2%

Geographic Allocation 

Table Summary

Japan

21.5%

United States

12.0%

United Kingdom

7.3%

France

7.2%

Netherlands

5.8%

Canada

5.4%

Germany

4.7%

Hong Kong

4.0%

Italy

3.9%

Australia

3.6%

Other

24.2%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Overseas Value Fund | Institutional 2 Class | SSR208-15_(10/26) |

Columbia Overseas Value Fund

Institutional 3 Class | COSYX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Overseas Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 3 Class

$39

0.77%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$6,956,234,058

Total number of portfolio holdings

115

Portfolio turnover for the reporting period

25%

Columbia Overseas Value Fund | Institutional 3 Class | SSR208-17_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Shell PLC

3.6%

Sumitomo Mitsui Financial Group, Inc.

2.5%

AXA SA

2.5%

TotalEnergies SE

2.4%

ING Groep NV

2.3%

BPER Banca SPA

2.2%

Mebuki Financial Group, Inc.

2.2%

ASR Nederland NV

2.2%

Piraeus Bank SA

2.2%

Bank of Ireland Group PLC

2.1%

Equity Sector Allocation

Table Summary

Financials

37.8%

Energy

12.0%

Consumer Staples

11.4%

Materials

7.5%

Industrials

7.4%

Health Care

6.9%

Information Technology

5.7%

Consumer Discretionary

3.9%

Real Estate

2.4%

Utilities

1.7%

Other

1.2%

Geographic Allocation 

Table Summary

Japan

21.5%

United States

12.0%

United Kingdom

7.3%

France

7.2%

Netherlands

5.8%

Canada

5.4%

Germany

4.7%

Hong Kong

4.0%

Italy

3.9%

Australia

3.6%

Other

24.2%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Overseas Value Fund | Institutional 3 Class | SSR208-17_(10/26) |

Columbia Overseas Value Fund

Class R | COVUX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Overseas Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class R

$71

1.40%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$6,956,234,058

Total number of portfolio holdings

115

Portfolio turnover for the reporting period

25%

Columbia Overseas Value Fund | Class R | SSR208-12_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Shell PLC

3.6%

Sumitomo Mitsui Financial Group, Inc.

2.5%

AXA SA

2.5%

TotalEnergies SE

2.4%

ING Groep NV

2.3%

BPER Banca SPA

2.2%

Mebuki Financial Group, Inc.

2.2%

ASR Nederland NV

2.2%

Piraeus Bank SA

2.2%

Bank of Ireland Group PLC

2.1%

Equity Sector Allocation

Table Summary

Financials

37.8%

Energy

12.0%

Consumer Staples

11.4%

Materials

7.5%

Industrials

7.4%

Health Care

6.9%

Information Technology

5.7%

Consumer Discretionary

3.9%

Real Estate

2.4%

Utilities

1.7%

Other

1.2%

Geographic Allocation 

Table Summary

Japan

21.5%

United States

12.0%

United Kingdom

7.3%

France

7.2%

Netherlands

5.8%

Canada

5.4%

Germany

4.7%

Hong Kong

4.0%

Italy

3.9%

Australia

3.6%

Other

24.2%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Overseas Value Fund | Class R | SSR208-12_(10/26) |

Columbia Overseas Value Fund

Class S | COSBX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Overseas Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class S

$45

0.89%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$6,956,234,058

Total number of portfolio holdings

115

Portfolio turnover for the reporting period

25%

Columbia Overseas Value Fund | Class S | SSR208-16_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Shell PLC

3.6%

Sumitomo Mitsui Financial Group, Inc.

2.5%

AXA SA

2.5%

TotalEnergies SE

2.4%

ING Groep NV

2.3%

BPER Banca SPA

2.2%

Mebuki Financial Group, Inc.

2.2%

ASR Nederland NV

2.2%

Piraeus Bank SA

2.2%

Bank of Ireland Group PLC

2.1%

Equity Sector Allocation

Table Summary

Financials

37.8%

Energy

12.0%

Consumer Staples

11.4%

Materials

7.5%

Industrials

7.4%

Health Care

6.9%

Information Technology

5.7%

Consumer Discretionary

3.9%

Real Estate

2.4%

Utilities

1.7%

Other

1.2%

Geographic Allocation 

Table Summary

Japan

21.5%

United States

12.0%

United Kingdom

7.3%

France

7.2%

Netherlands

5.8%

Canada

5.4%

Germany

4.7%

Hong Kong

4.0%

Italy

3.9%

Australia

3.6%

Other

24.2%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Overseas Value Fund | Class S | SSR208-16_(10/26) |

Columbia Select Mid Cap Value Fund

Class A | CMUAX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Select Mid Cap Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class A

$59

1.11%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$3,343,938,274

Total number of portfolio holdings

51

Portfolio turnover for the reporting period

15%

Columbia Select Mid Cap Value Fund | Class A | SSR197-01_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Marathon Petroleum Corp.

4.2%

Devon Energy Corp.

2.7%

Popular, Inc.

2.6%

ITT, Inc.

2.5%

AMETEK, Inc.

2.5%

Entergy Corp.

2.5%

Voya Financial, Inc.

2.5%

Quest Diagnostics, Inc.

2.4%

Ameren Corp.

2.4%

U.S. Foods Holding Corp.

2.4%

Asset Categories

Table Summary

Common Stocks

97.1%

Money Market Funds

2.7%

Equity Sector Allocation

Table Summary

Financials

17.5%

Industrials

14.9%

Information Technology

11.7%

Health Care

9.2%

Consumer Discretionary

8.4%

Real Estate

7.4%

Energy

6.9%

Utilities

6.2%

Consumer Staples

5.7%

Materials

5.5%

Other

3.7%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Select Mid Cap Value Fund | Class A | SSR197-01_(10/26) |

Columbia Select Mid Cap Value Fund

Class C | CMUCX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Select Mid Cap Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class C

$99

1.86%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$3,343,938,274

Total number of portfolio holdings

51

Portfolio turnover for the reporting period

15%

Columbia Select Mid Cap Value Fund | Class C | SSR197-04_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Marathon Petroleum Corp.

4.2%

Devon Energy Corp.

2.7%

Popular, Inc.

2.6%

ITT, Inc.

2.5%

AMETEK, Inc.

2.5%

Entergy Corp.

2.5%

Voya Financial, Inc.

2.5%

Quest Diagnostics, Inc.

2.4%

Ameren Corp.

2.4%

U.S. Foods Holding Corp.

2.4%

Asset Categories

Table Summary

Common Stocks

97.1%

Money Market Funds

2.7%

Equity Sector Allocation

Table Summary

Financials

17.5%

Industrials

14.9%

Information Technology

11.7%

Health Care

9.2%

Consumer Discretionary

8.4%

Real Estate

7.4%

Energy

6.9%

Utilities

6.2%

Consumer Staples

5.7%

Materials

5.5%

Other

3.7%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Select Mid Cap Value Fund | Class C | SSR197-04_(10/26) |

Columbia Select Mid Cap Value Fund

Institutional Class | NAMAX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Select Mid Cap Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional Class

$46

0.86%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$3,343,938,274

Total number of portfolio holdings

51

Portfolio turnover for the reporting period

15%

Columbia Select Mid Cap Value Fund | Institutional Class | SSR197-08_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Marathon Petroleum Corp.

4.2%

Devon Energy Corp.

2.7%

Popular, Inc.

2.6%

ITT, Inc.

2.5%

AMETEK, Inc.

2.5%

Entergy Corp.

2.5%

Voya Financial, Inc.

2.5%

Quest Diagnostics, Inc.

2.4%

Ameren Corp.

2.4%

U.S. Foods Holding Corp.

2.4%

Asset Categories

Table Summary

Common Stocks

97.1%

Money Market Funds

2.7%

Equity Sector Allocation

Table Summary

Financials

17.5%

Industrials

14.9%

Information Technology

11.7%

Health Care

9.2%

Consumer Discretionary

8.4%

Real Estate

7.4%

Energy

6.9%

Utilities

6.2%

Consumer Staples

5.7%

Materials

5.5%

Other

3.7%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Select Mid Cap Value Fund | Institutional Class | SSR197-08_(10/26) |

Columbia Select Mid Cap Value Fund

Institutional 2 Class | CVERX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Select Mid Cap Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 2 Class

$42

0.79%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$3,343,938,274

Total number of portfolio holdings

51

Portfolio turnover for the reporting period

15%

Columbia Select Mid Cap Value Fund | Institutional 2 Class | SSR197-15_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Marathon Petroleum Corp.

4.2%

Devon Energy Corp.

2.7%

Popular, Inc.

2.6%

ITT, Inc.

2.5%

AMETEK, Inc.

2.5%

Entergy Corp.

2.5%

Voya Financial, Inc.

2.5%

Quest Diagnostics, Inc.

2.4%

Ameren Corp.

2.4%

U.S. Foods Holding Corp.

2.4%

Asset Categories

Table Summary

Common Stocks

97.1%

Money Market Funds

2.7%

Equity Sector Allocation

Table Summary

Financials

17.5%

Industrials

14.9%

Information Technology

11.7%

Health Care

9.2%

Consumer Discretionary

8.4%

Real Estate

7.4%

Energy

6.9%

Utilities

6.2%

Consumer Staples

5.7%

Materials

5.5%

Other

3.7%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Select Mid Cap Value Fund | Institutional 2 Class | SSR197-15_(10/26) |

Columbia Select Mid Cap Value Fund

Institutional 3 Class | CMVYX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Select Mid Cap Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 3 Class

$39

0.74%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$3,343,938,274

Total number of portfolio holdings

51

Portfolio turnover for the reporting period

15%

Columbia Select Mid Cap Value Fund | Institutional 3 Class | SSR197-17_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Marathon Petroleum Corp.

4.2%

Devon Energy Corp.

2.7%

Popular, Inc.

2.6%

ITT, Inc.

2.5%

AMETEK, Inc.

2.5%

Entergy Corp.

2.5%

Voya Financial, Inc.

2.5%

Quest Diagnostics, Inc.

2.4%

Ameren Corp.

2.4%

U.S. Foods Holding Corp.

2.4%

Asset Categories

Table Summary

Common Stocks

97.1%

Money Market Funds

2.7%

Equity Sector Allocation

Table Summary

Financials

17.5%

Industrials

14.9%

Information Technology

11.7%

Health Care

9.2%

Consumer Discretionary

8.4%

Real Estate

7.4%

Energy

6.9%

Utilities

6.2%

Consumer Staples

5.7%

Materials

5.5%

Other

3.7%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Select Mid Cap Value Fund | Institutional 3 Class | SSR197-17_(10/26) |

Columbia Select Mid Cap Value Fund

Class R | CMVRX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Select Mid Cap Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class R

$72

1.36%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$3,343,938,274

Total number of portfolio holdings

51

Portfolio turnover for the reporting period

15%

Columbia Select Mid Cap Value Fund | Class R | SSR197-12_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Marathon Petroleum Corp.

4.2%

Devon Energy Corp.

2.7%

Popular, Inc.

2.6%

ITT, Inc.

2.5%

AMETEK, Inc.

2.5%

Entergy Corp.

2.5%

Voya Financial, Inc.

2.5%

Quest Diagnostics, Inc.

2.4%

Ameren Corp.

2.4%

U.S. Foods Holding Corp.

2.4%

Asset Categories

Table Summary

Common Stocks

97.1%

Money Market Funds

2.7%

Equity Sector Allocation

Table Summary

Financials

17.5%

Industrials

14.9%

Information Technology

11.7%

Health Care

9.2%

Consumer Discretionary

8.4%

Real Estate

7.4%

Energy

6.9%

Utilities

6.2%

Consumer Staples

5.7%

Materials

5.5%

Other

3.7%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Select Mid Cap Value Fund | Class R | SSR197-12_(10/26) |

Columbia Select Mid Cap Value Fund

Class S | NAMBX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Select Mid Cap Value Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class S

$46

0.86%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$3,343,938,274

Total number of portfolio holdings

51

Portfolio turnover for the reporting period

15%

Columbia Select Mid Cap Value Fund | Class S | SSR197-16_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Marathon Petroleum Corp.

4.2%

Devon Energy Corp.

2.7%

Popular, Inc.

2.6%

ITT, Inc.

2.5%

AMETEK, Inc.

2.5%

Entergy Corp.

2.5%

Voya Financial, Inc.

2.5%

Quest Diagnostics, Inc.

2.4%

Ameren Corp.

2.4%

U.S. Foods Holding Corp.

2.4%

Asset Categories

Table Summary

Common Stocks

97.1%

Money Market Funds

2.7%

Equity Sector Allocation

Table Summary

Financials

17.5%

Industrials

14.9%

Information Technology

11.7%

Health Care

9.2%

Consumer Discretionary

8.4%

Real Estate

7.4%

Energy

6.9%

Utilities

6.2%

Consumer Staples

5.7%

Materials

5.5%

Other

3.7%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Select Mid Cap Value Fund | Class S | SSR197-16_(10/26) |

Columbia Small Cap Index Fund

Class A | NMSAX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Small Cap Index Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class A

$24

0.45%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$2,604,973,821

Total number of portfolio holdings

608

Portfolio turnover for the reporting period

15%

Columbia Small Cap Index Fund | Class A | SSR228-01_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

iShares Core S&P Small-Cap ETF

0.7%

Corcept Therapeutics, Inc.

0.6%

Glaukos Corp.

0.6%

Paycom Software, Inc.

0.5%

Brinker International, Inc.

0.5%

Match Group, Inc.

0.5%

Jackson Financial, Inc., Class A

0.5%

Viasat, Inc.

0.5%

Protagonist Therapeutics, Inc.

0.5%

CarMax, Inc.

0.5%

Asset Categories

Table Summary

Common Stocks

98.5%

Other

1.5%

Equity Sector Allocation

Table Summary

Financials

18.8%

Industrials

17.2%

Consumer Discretionary

13.7%

Information Technology

12.3%

Health Care

10.8%

Real Estate

6.4%

Energy

6.1%

Materials

4.3%

Consumer Staples

3.5%

Communication Services

3.4%

Other

2.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Small Cap Index Fund | Class A | SSR228-01_(10/26) |

Columbia Small Cap Index Fund

Institutional Class | NMSCX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Small Cap Index Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional Class

$11

0.20%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$2,604,973,821

Total number of portfolio holdings

608

Portfolio turnover for the reporting period

15%

Columbia Small Cap Index Fund | Institutional Class | SSR228-08_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

iShares Core S&P Small-Cap ETF

0.7%

Corcept Therapeutics, Inc.

0.6%

Glaukos Corp.

0.6%

Paycom Software, Inc.

0.5%

Brinker International, Inc.

0.5%

Match Group, Inc.

0.5%

Jackson Financial, Inc., Class A

0.5%

Viasat, Inc.

0.5%

Protagonist Therapeutics, Inc.

0.5%

CarMax, Inc.

0.5%

Asset Categories

Table Summary

Common Stocks

98.5%

Other

1.5%

Equity Sector Allocation

Table Summary

Financials

18.8%

Industrials

17.2%

Consumer Discretionary

13.7%

Information Technology

12.3%

Health Care

10.8%

Real Estate

6.4%

Energy

6.1%

Materials

4.3%

Consumer Staples

3.5%

Communication Services

3.4%

Other

2.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Small Cap Index Fund | Institutional Class | SSR228-08_(10/26) |

Columbia Small Cap Index Fund

Institutional 2 Class | CXXRX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Small Cap Index Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 2 Class

$11

0.20%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$2,604,973,821

Total number of portfolio holdings

608

Portfolio turnover for the reporting period

15%

Columbia Small Cap Index Fund | Institutional 2 Class | SSR228-15_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

iShares Core S&P Small-Cap ETF

0.7%

Corcept Therapeutics, Inc.

0.6%

Glaukos Corp.

0.6%

Paycom Software, Inc.

0.5%

Brinker International, Inc.

0.5%

Match Group, Inc.

0.5%

Jackson Financial, Inc., Class A

0.5%

Viasat, Inc.

0.5%

Protagonist Therapeutics, Inc.

0.5%

CarMax, Inc.

0.5%

Asset Categories

Table Summary

Common Stocks

98.5%

Other

1.5%

Equity Sector Allocation

Table Summary

Financials

18.8%

Industrials

17.2%

Consumer Discretionary

13.7%

Information Technology

12.3%

Health Care

10.8%

Real Estate

6.4%

Energy

6.1%

Materials

4.3%

Consumer Staples

3.5%

Communication Services

3.4%

Other

2.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Small Cap Index Fund | Institutional 2 Class | SSR228-15_(10/26) |

Columbia Small Cap Index Fund

Institutional 3 Class | CSPYX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Small Cap Index Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 3 Class

$11

0.20%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$2,604,973,821

Total number of portfolio holdings

608

Portfolio turnover for the reporting period

15%

Columbia Small Cap Index Fund | Institutional 3 Class | SSR228-17_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

iShares Core S&P Small-Cap ETF

0.7%

Corcept Therapeutics, Inc.

0.6%

Glaukos Corp.

0.6%

Paycom Software, Inc.

0.5%

Brinker International, Inc.

0.5%

Match Group, Inc.

0.5%

Jackson Financial, Inc., Class A

0.5%

Viasat, Inc.

0.5%

Protagonist Therapeutics, Inc.

0.5%

CarMax, Inc.

0.5%

Asset Categories

Table Summary

Common Stocks

98.5%

Other

1.5%

Equity Sector Allocation

Table Summary

Financials

18.8%

Industrials

17.2%

Consumer Discretionary

13.7%

Information Technology

12.3%

Health Care

10.8%

Real Estate

6.4%

Energy

6.1%

Materials

4.3%

Consumer Staples

3.5%

Communication Services

3.4%

Other

2.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Small Cap Index Fund | Institutional 3 Class | SSR228-17_(10/26) |

Columbia Small Cap Value and Inflection Fund

Class A | COVAX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Small Cap Value and Inflection Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class A

$65

1.20%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$905,253,911

Total number of portfolio holdings

101

Portfolio turnover for the reporting period

58%

Columbia Small Cap Value and Inflection Fund | Class A | SSR230-01_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Phillips Edison & Co., Inc.

1.9%

Essent Group Ltd.

1.7%

Korn/Ferry International

1.7%

Insight Enterprises, Inc.

1.7%

Fulton Financial Corp.

1.7%

Associated Banc-Corp.

1.6%

Texas Capital Bancshares, Inc.

1.6%

ICU Medical, Inc.

1.6%

Avient Corp.

1.6%

Polaris, Inc.

1.5%

Asset Categories

Table Summary

Common Stocks

99.2%

Other

1.0%

Equity Sector Allocation

Table Summary

Financials

21.5%

Industrials

15.8%

Real Estate

11.6%

Health Care

10.4%

Information Technology

8.3%

Energy

8.2%

Materials

7.8%

Consumer Discretionary

7.0%

Consumer Staples

4.1%

Communication Services

2.5%

Other

2.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Small Cap Value and Inflection Fund | Class A | SSR230-01_(10/26) |

Columbia Small Cap Value and Inflection Fund

Institutional Class | NSVAX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Small Cap Value and Inflection Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional Class

$51

0.95%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$905,253,911

Total number of portfolio holdings

101

Portfolio turnover for the reporting period

58%

Columbia Small Cap Value and Inflection Fund | Institutional Class | SSR230-08_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Phillips Edison & Co., Inc.

1.9%

Essent Group Ltd.

1.7%

Korn/Ferry International

1.7%

Insight Enterprises, Inc.

1.7%

Fulton Financial Corp.

1.7%

Associated Banc-Corp.

1.6%

Texas Capital Bancshares, Inc.

1.6%

ICU Medical, Inc.

1.6%

Avient Corp.

1.6%

Polaris, Inc.

1.5%

Asset Categories

Table Summary

Common Stocks

99.2%

Other

1.0%

Equity Sector Allocation

Table Summary

Financials

21.5%

Industrials

15.8%

Real Estate

11.6%

Health Care

10.4%

Information Technology

8.3%

Energy

8.2%

Materials

7.8%

Consumer Discretionary

7.0%

Consumer Staples

4.1%

Communication Services

2.5%

Other

2.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Small Cap Value and Inflection Fund | Institutional Class | SSR230-08_(10/26) |

Columbia Small Cap Value and Inflection Fund

Institutional 2 Class | CRRRX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Small Cap Value and Inflection Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 2 Class

$43

0.80%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$905,253,911

Total number of portfolio holdings

101

Portfolio turnover for the reporting period

58%

Columbia Small Cap Value and Inflection Fund | Institutional 2 Class | SSR230-15_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Phillips Edison & Co., Inc.

1.9%

Essent Group Ltd.

1.7%

Korn/Ferry International

1.7%

Insight Enterprises, Inc.

1.7%

Fulton Financial Corp.

1.7%

Associated Banc-Corp.

1.6%

Texas Capital Bancshares, Inc.

1.6%

ICU Medical, Inc.

1.6%

Avient Corp.

1.6%

Polaris, Inc.

1.5%

Asset Categories

Table Summary

Common Stocks

99.2%

Other

1.0%

Equity Sector Allocation

Table Summary

Financials

21.5%

Industrials

15.8%

Real Estate

11.6%

Health Care

10.4%

Information Technology

8.3%

Energy

8.2%

Materials

7.8%

Consumer Discretionary

7.0%

Consumer Staples

4.1%

Communication Services

2.5%

Other

2.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Small Cap Value and Inflection Fund | Institutional 2 Class | SSR230-15_(10/26) |

Columbia Small Cap Value and Inflection Fund

Institutional 3 Class | CRRYX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Small Cap Value and Inflection Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Institutional 3 Class

$41

0.75%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$905,253,911

Total number of portfolio holdings

101

Portfolio turnover for the reporting period

58%

Columbia Small Cap Value and Inflection Fund | Institutional 3 Class | SSR230-17_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Phillips Edison & Co., Inc.

1.9%

Essent Group Ltd.

1.7%

Korn/Ferry International

1.7%

Insight Enterprises, Inc.

1.7%

Fulton Financial Corp.

1.7%

Associated Banc-Corp.

1.6%

Texas Capital Bancshares, Inc.

1.6%

ICU Medical, Inc.

1.6%

Avient Corp.

1.6%

Polaris, Inc.

1.5%

Asset Categories

Table Summary

Common Stocks

99.2%

Other

1.0%

Equity Sector Allocation

Table Summary

Financials

21.5%

Industrials

15.8%

Real Estate

11.6%

Health Care

10.4%

Information Technology

8.3%

Energy

8.2%

Materials

7.8%

Consumer Discretionary

7.0%

Consumer Staples

4.1%

Communication Services

2.5%

Other

2.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Small Cap Value and Inflection Fund | Institutional 3 Class | SSR230-17_(10/26) |

Columbia Small Cap Value and Inflection Fund

Class R | CCTRX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Small Cap Value and Inflection Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class R

$78

1.45%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$905,253,911

Total number of portfolio holdings

101

Portfolio turnover for the reporting period

58%

Columbia Small Cap Value and Inflection Fund | Class R | SSR230-12_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Phillips Edison & Co., Inc.

1.9%

Essent Group Ltd.

1.7%

Korn/Ferry International

1.7%

Insight Enterprises, Inc.

1.7%

Fulton Financial Corp.

1.7%

Associated Banc-Corp.

1.6%

Texas Capital Bancshares, Inc.

1.6%

ICU Medical, Inc.

1.6%

Avient Corp.

1.6%

Polaris, Inc.

1.5%

Asset Categories

Table Summary

Common Stocks

99.2%

Other

1.0%

Equity Sector Allocation

Table Summary

Financials

21.5%

Industrials

15.8%

Real Estate

11.6%

Health Care

10.4%

Information Technology

8.3%

Energy

8.2%

Materials

7.8%

Consumer Discretionary

7.0%

Consumer Staples

4.1%

Communication Services

2.5%

Other

2.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Small Cap Value and Inflection Fund | Class R | SSR230-12_(10/26) |

Columbia Small Cap Value and Inflection Fund

Class S | NSVBX 

Image

Semi-Annual Shareholder Report | August 31, 2026

This semi-annual shareholder report contains important information about Columbia Small Cap Value and Inflection Fund (the Fund) for the period of March 1, 2026 to August 31, 2026. You can find additional information about the Fund at columbiathreadneedleus.com/resources/literature. You can also request more information by contacting us at 1-800-345-6611.

What were the Fund costs for the reporting period? 

(Based on a hypothetical $10,000 investment)

Table Summary

Class

Cost of a $10,000 investment

Cost paid as a percentage of a $10,000 investment

Class S

$51

0.95%Footnote Reference(a)

Footnote Description

Footnote(a)

Annualized

Key Fund Statistics

Table Summary

Fund net assets

$905,253,911

Total number of portfolio holdings

101

Portfolio turnover for the reporting period

58%

Columbia Small Cap Value and Inflection Fund | Class S | SSR230-16_(10/26) |

Graphical Representation of Fund Holdings

The tables below show the investment makeup of the Fund represented as a percentage of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.

Top Holdings 

Table Summary

Phillips Edison & Co., Inc.

1.9%

Essent Group Ltd.

1.7%

Korn/Ferry International

1.7%

Insight Enterprises, Inc.

1.7%

Fulton Financial Corp.

1.7%

Associated Banc-Corp.

1.6%

Texas Capital Bancshares, Inc.

1.6%

ICU Medical, Inc.

1.6%

Avient Corp.

1.6%

Polaris, Inc.

1.5%

Asset Categories

Table Summary

Common Stocks

99.2%

Other

1.0%

Equity Sector Allocation

Table Summary

Financials

21.5%

Industrials

15.8%

Real Estate

11.6%

Health Care

10.4%

Information Technology

8.3%

Energy

8.2%

Materials

7.8%

Consumer Discretionary

7.0%

Consumer Staples

4.1%

Communication Services

2.5%

Other

2.0%

Availability of Additional Information 

For additional information about the Fund, including its prospectus, financial information, holdings, federal tax information and proxy voting information, visit the Fund’s website included at the beginning of this report or scan the QR code below.

The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC. Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies.

© 2026 Columbia Threadneedle. All rights reserved.

Not FDIC or NCUA Insured • No Financial Institution Guarantee • May Lose Value

An image of a QR code that, when scanned, navigates the user to the following URL: https://www.columbiathreadneedleus.com/resources/literature

Columbia Small Cap Value and Inflection Fund | Class S | SSR230-16_(10/26) |


Item 2. Code of Ethics.

Not applicable.

Item 3. Audit Committee Financial Expert.

Not applicable.

Item 4. Principal Accountant Fees and Services.

Not applicable.

Item 5. Audit Committee of Listed Registrants.

Not applicable.

Item 6. Investments.

(a) The registrant’s “Schedule I – Investments in securities of unaffiliated issuers” (as set forth in 17 CFR 210.12-12) is included in Item 7 of this Form N-CSR.

(b) Not applicable.

Item 7. Financial Statements and Financial Highlights for Open-End Management Investment Companies.


  

Columbia Convertible Securities Fund

Semi-Annual Financial Statements and Additional Information

August 31, 2026 (Unaudited)

Not FDIC or NCUA Insured

No Financial Institution Guarantee

May Lose Value


Table of Contents

Portfolio of Investments

3

Statement of Assets and Liabilities

9

Statement of Operations

11

Statement of Changes in Net Assets

12

Financial Highlights

14

Notes to Financial Statements

18

Approval of Management Agreement

26

Columbia Convertible Securities Fund | 2026


Portfolio of Investments

August 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

Investments in securities

Common Stocks 2.8%

Issuer

Shares

Value ($)

Information Technology 2.3%

Technology Hardware, Storage & Peripherals 2.3%

Hewlett Packard Enterprise Co.

300,000

15,672,000

Western Digital Corp.

55,000

24,780,250

Total

40,452,250

Total Information Technology

40,452,250

Real Estate 0.5%

Office REITs 0.5%

BXP, Inc.

120,000

8,158,800

Total Real Estate

8,158,800

Total Common Stocks

(Cost $42,462,750)

48,611,050

Convertible Bonds 73.9%

Issuer

Coupon

Rate

Principal

Amount ($)

Value ($)

Aerospace & Defense 0.5%

Voyager Technologies, Inc.(a)

11/15/2030

0.750%

6,000,000

7,974,000

Automotive 1.3%

Rivian Automotive, Inc.

10/15/2030

3.625%

14,000,000

14,758,800

Wabash National Corp.(a)

08/01/2032

4.000%

7,900,000

8,526,574

Total

23,285,374

Banking 1.0%

Barclays Bank PLC

02/16/2029

1.000%

15,000,000

16,710,193

Brokerage/Asset Managers/Exchanges 4.0%

Coinbase Global, Inc.

04/01/2030

0.250%

9,000,000

8,752,500

Coinbase Global, Inc.(b)

10/01/2032

0.000%

17,000,000

14,458,500

Galaxy Digital Holdings LP(a)

05/01/2031

0.500%

21,500,000

16,920,500

Robinhood Markets, Inc.(a),(b)

10/01/2029

0.000%

17,316,000

17,549,181

WisdomTree, Inc.

08/15/2030

4.625%

8,500,000

12,275,700

Total

69,956,381

Convertible Bonds (continued)

Issuer

Coupon

Rate

Principal

Amount ($)

Value ($)

Cable and Satellite 1.1%

AST SpaceMobile, Inc.(a)

04/15/2036

2.250%

11,000,000

8,756,000

BlackSky Technology, Inc.(a)

08/01/2033

8.250%

8,000,000

9,640,667

Total

18,396,667

Consumer Cyclical Services 1.3%

DoorDash, Inc.(b)

05/15/2030

0.000%

9,000,000

9,625,500

Lyft, Inc.(a),(b)

09/15/2030

0.000%

11,900,000

12,167,750

Total

21,793,250

Diversified Manufacturing 4.4%

Advanced Energy Industries, Inc.(a),(b)

05/15/2031

0.000%

21,000,000

20,097,000

Bloom Energy Corp.(a),(b)

11/15/2030

0.000%

12,000,000

16,626,000

BWX Technologies, Inc.(a),(b)

11/01/2030

0.000%

18,000,000

16,515,000

Itron, Inc.(a),(b)

03/15/2032

0.000%

14,500,000

14,456,500

JBT Marel Corp.(a)

09/15/2030

0.375%

10,000,000

9,220,000

Total

76,914,500

Electric 4.8%

Alliant Energy Corp.

05/30/2028

3.250%

12,000,000

12,396,000

CenterPoint Energy, Inc.

08/01/2028

3.000%

12,000,000

12,186,000

CMS Energy Corp.

05/01/2028

3.375%

13,000,000

13,650,000

FirstEnergy Corp.

01/15/2031

3.875%

14,500,000

15,712,097

PPL Capital Funding, Inc.

03/15/2028

2.875%

15,000,000

16,248,000

WEC Energy Group, Inc.

06/01/2029

4.375%

12,000,000

13,902,000

Total

84,094,097

Finance Companies 1.0%

Cipher Digital, Inc.(a),(b)

10/01/2031

0.000%

7,000,000

8,911,461

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Convertible Securities Fund  | 2026

3


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Convertible Bonds (continued)

Issuer

Coupon

Rate

Principal

Amount ($)

Value ($)

Dave, Inc.(a),(b)

04/01/2031

0.000%

6,000,000

8,940,000

Total

17,851,461

Health Care 3.5%

Adaptive Biotechnologies Corp.(a),(b)

07/01/2031

0.000%

7,930,000

10,140,487

Hims & Hers Health, Inc.(a),(b)

05/15/2030

0.000%

5,950,000

5,105,695

iRhythm Technologies, Inc.

09/01/2029

1.500%

10,880,000

11,902,720

LivaNova PLC

03/15/2029

2.500%

7,000,000

9,271,500

Merit Medical Systems, Inc.(a)

02/01/2029

3.000%

13,500,000

16,267,500

Oscar Health, Inc.(a)

09/01/2030

2.250%

5,000,000

7,424,000

Total

60,111,902

Healthcare REIT 1.5%

Healthcare Realty Holdings LP(a)

01/15/2032

3.000%

9,000,000

8,982,000

Welltower OP LLC(a)

07/15/2029

3.125%

9,000,000

16,762,083

Total

25,744,083

Independent Energy 0.5%

Ormat Technologies, Inc.(a)

03/15/2031

1.500%

7,900,000

8,053,063

Integrated Energy 0.3%

Sable Offshore Corp.

07/01/2031

6.500%

4,000,000

5,720,400

Leisure 2.3%

IMAX Corp.(a)

11/15/2030

0.750%

6,000,000

8,076,000

Live Nation Entertainment, Inc.

01/15/2030

2.875%

27,000,000

31,225,500

Total

39,301,500

Media and Entertainment 0.4%

Liberty Media Corp./Formula One(a)

08/15/2032

2.375%

7,900,000

7,824,950

Metals and Mining 1.9%

Centrus Energy Corp.(b)

08/15/2032

0.000%

11,000,000

11,377,300

Convertible Bonds (continued)

Issuer

Coupon

Rate

Principal

Amount ($)

Value ($)

MP Materials Corp.(a)

03/01/2030

3.000%

4,000,000

10,361,200

Peabody Energy Corp.(a)

06/01/2031

0.500%

10,000,000

10,405,000

Total

32,143,500

Midstream 1.3%

Golar LNG Ltd.

12/15/2030

2.750%

6,920,000

7,940,700

Scorpio Tankers, Inc.(a)

04/15/2031

1.750%

5,920,000

6,268,497

UGI Corp.

06/01/2028

5.000%

6,000,000

8,539,800

Total

22,748,997

Oil Field Services 1.8%

Atlas Energy Solutions, Inc.(a)

04/15/2031

0.500%

7,920,000

9,028,008

Crescent Energy Co.(a)

03/15/2031

2.750%

12,000,000

13,860,000

Liberty Energy, Inc.(a),(b)

03/01/2031

0.000%

8,900,000

7,969,950

Total

30,857,958

Other Financial Institutions 2.3%

MARA Holdings, Inc.(b)

08/01/2032

0.000%

19,000,000

16,625,000

Terawulf, Inc.(a),(b)

05/01/2032

0.000%

21,000,000

22,505,700

Total

39,130,700

Other Industry 1.1%

Fluor Corp.

08/15/2029

1.125%

9,000,000

12,177,000

Willis Lease Finance Corp.

05/15/2031

2.500%

7,900,000

7,331,200

Total

19,508,200

Other REIT 1.4%

Digital Realty Trust LP(a)

11/15/2029

1.875%

15,000,000

16,012,500

Macerich Partnership LP (The)(a)

08/15/2031

2.250%

8,880,000

8,834,712

Total

24,847,212

Other Utility 0.3%

PureCycle Technologies, Inc.

07/01/2032

4.750%

5,930,000

5,319,210

The accompanying Notes to Financial Statements are an integral part of this statement.

4

Columbia Convertible Securities Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Convertible Bonds (continued)

Issuer

Coupon

Rate

Principal

Amount ($)

Value ($)

Pharmaceuticals 8.5%

Bridgebio Pharma, Inc.(a)

02/01/2033

0.750%

20,000,000

19,898,000

Cytokinetics, Inc.(a)

10/01/2031

1.750%

9,500,000

12,536,871

Guardant Health, Inc.(a),(b)

05/15/2033

0.000%

11,000,000

16,713,125

Halozyme Therapeutics, Inc.(a)

11/15/2032

0.875%

13,500,000

18,225,000

Jazz Investments I Ltd.(a)

09/15/2032

1.875%

17,000,000

17,068,000

Mirum Pharmaceuticals, Inc.(a),(b)

06/01/2032

0.000%

18,000,000

17,505,997

PTC Therapeutics, Inc.(a),(b)

06/15/2031

0.000%

13,850,000

13,431,730

Revolution Medicines, Inc.

05/01/2033

0.500%

8,000,000

10,455,000

Sarepta Therapeutics, Inc.(a)

09/01/2030

4.875%

8,920,000

7,793,850

Travere Therapeutics, Inc.

05/15/2032

0.500%

11,000,000

14,098,700

Total

147,726,273

Retail REIT 1.0%

Realty Income Corp.(a)

01/15/2029

3.500%

17,000,000

17,322,861

Retailers 0.3%

Alibaba Group Holding Ltd.

06/01/2031

0.500%

4,700,000

6,164,050

Technology 25.0%

Akamai Technologies, Inc.(a),(b)

05/15/2032

0.000%

9,000,000

7,911,000

Akamai Technologies, Inc.

05/15/2033

0.250%

14,500,000

19,720,000

Avnet, Inc.(a)

09/01/2030

1.750%

8,000,000

11,220,000

Celcuity, Inc.

08/01/2031

2.750%

3,000,000

5,938,500

Cloudflare, Inc.(b)

06/15/2030

0.000%

7,000,000

10,110,657

Cloudflare, Inc.(a),(b)

08/15/2031

0.000%

18,000,000

17,721,000

Cogent Biosciences, Inc.

11/15/2031

1.625%

6,000,000

6,876,000

Convertible Bonds (continued)

Issuer

Coupon

Rate

Principal

Amount ($)

Value ($)

Commvault Systems, Inc.(a),(b)

09/15/2030

0.000%

11,880,000

11,020,757

CoreWeave, Inc.(a)

12/01/2031

1.750%

16,000,000

16,152,000

10/01/2032

1.750%

15,000,000

13,962,000

CyberArk Software Ltd.(b)

06/15/2030

0.000%

7,000,000

12,771,500

Dynatrace LLC(a),(b)

09/01/2031

0.000%

16,800,000

18,107,696

Eos Energy Enterprises, Inc.(a)

12/01/2031

1.750%

12,000,000

7,092,000

Evolent Health, Inc.

12/01/2029

3.500%

7,000,000

5,069,400

IREN Ltd.(a),(b)

07/01/2031

0.000%

22,000,000

16,115,000

Ligand Pharmaceuticals, Inc.(a),(b)

09/15/2031

0.000%

12,500,000

13,195,312

Lumentum Holdings, Inc.(a)

03/15/2032

0.375%

4,500,000

22,216,050

MACOM Technology Solutions Holdings, Inc.(b)

12/15/2029

0.000%

5,500,000

9,295,000

Microchip Technology, Inc.(a),(b)

02/15/2030

0.000%

23,000,000

24,035,000

MKS, Inc.

06/01/2030

1.250%

4,000,000

7,196,000

Nebius Group NV(a)

02/15/2034

4.500%

16,450,000

15,951,565

ON Semiconductor Corp.

03/01/2029

0.500%

27,000,000

28,593,000

Onto Innovation, Inc.(a),(b)

06/01/2031

0.000%

12,000,000

13,019,809

Penguin Solutions, Inc.(a),(b)

08/01/2031

0.000%

11,850,000

10,179,150

Plug Power, Inc.(a)

12/01/2033

6.750%

4,500,000

5,255,100

Procore Technologies, Inc.(a),(b)

08/15/2031

0.000%

8,900,000

9,339,437

Semtech Corp.(a),(b)

10/15/2030

0.000%

6,000,000

9,575,156

SiTime Corp.(b)

06/15/2031

0.000%

10,850,000

10,622,150

Snowflake, Inc.(b)

10/01/2029

0.000%

7,500,000

16,470,750

Tempus AI, Inc.(a),(b)

05/15/2032

0.000%

11,000,000

13,098,638

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Convertible Securities Fund  | 2026

5


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Convertible Bonds (continued)

Issuer

Coupon

Rate

Principal

Amount ($)

Value ($)

Tyler Technologies, Inc.(a)

07/15/2031

0.500%

12,000,000

13,428,000

Ultra Clean Holdings, Inc.(a),(b)

03/15/2031

0.000%

8,500,000

9,854,900

Viavi Solutions, Inc.(a)

03/01/2031

0.625%

3,460,000

9,523,650

Vishay Intertechnology, Inc.

09/15/2030

2.250%

9,000,000

11,601,000

Total

432,237,177

Transportation Services 1.1%

Hertz Corp. (The)(a),(c)

07/01/2030

6.750%

3,000,000

2,581,800

Knight-Swift Transportation Holdings, Inc.(a)

11/15/2031

1.000%

15,000,000

16,015,429

Total

18,597,229

Total Convertible Bonds

(Cost $1,176,510,457)

1,280,335,188

Convertible Preferred Stocks 21.0%

Issuer

Shares

Value ($)

Communication Services 6.1%

Interactive Media & Services 6.1%

Alphabet, Inc.

6.250%

1,100,000

53,306,000

Alphabet, Inc.

6.250%

1,100,000

52,657,000

Total

105,963,000

Total Communication Services

105,963,000

Consumer Discretionary 0.3%

Household Durables 0.3%

Whirlpool Corp.

8.500%

130,000

4,443,400

Total Consumer Discretionary

4,443,400

Financials 4.4%

Banks 3.6%

Bank of America Corp.(d)

7.250%

23,648

30,364,269

Wells Fargo & Co.

7.500%

28,000

32,318,522

Total

62,682,791

Capital Markets 0.8%

KKR & Co., Inc.

6.250%

300,000

13,971,000

Total Financials

76,653,791

Convertible Preferred Stocks (continued)

Issuer

Shares

Value ($)

Health Care 0.9%

Life Sciences Tools & Services 0.9%

Bruker Corp.

6.375%

35,000

14,772,100

Total Health Care

14,772,100

Industrials 3.0%

Aerospace & Defense 2.4%

Boeing Co. (The)

6.000%

520,000

33,690,800

VSE Corp.

5.750%

150,000

7,962,000

Total

41,652,800

Trading Companies & Distributors 0.6%

QXO, Inc.

5.500%

235,000

9,483,616

Total Industrials

51,136,416

Information Technology 2.6%

Electronic Equipment, Instruments & Components 0.4%

Novanta, Inc.

6.500%

120,000

7,438,800

Software 1.1%

Oracle Corp.

6.500%

400,000

18,464,000

Technology Hardware, Storage & Peripherals 1.1%

Hewlett Packard Enterprise Co.

7.625%

30,000

4,020,655

Super Micro Computer, Inc.

7.000%

250,000

15,734,611

Total

19,755,266

Total Information Technology

45,658,066

Materials 0.5%

Chemicals 0.5%

Albemarle Corp.

7.250%

160,000

8,793,600

Total Materials

8,793,600

Utilities 3.2%

Electric Utilities 3.2%

Duke Energy Corp.

7.750%

180,000

8,932,148

NextEra Energy, Inc.

7.375%

700,000

31,647,000

Southern Co. (The)

7.125%

330,000

15,730,953

Total

56,310,101

Total Utilities

56,310,101

Total Convertible Preferred Stocks

(Cost $350,379,628)

363,730,474

The accompanying Notes to Financial Statements are an integral part of this statement.

6

Columbia Convertible Securities Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Money Market Funds 1.0%

Shares

Value ($)

Columbia Short-Term Cash Fund, 3.871%(e),(f)

17,141,072

17,132,502

Total Money Market Funds

(Cost $17,130,022)

17,132,502

Total Investments in Securities

(Cost: $1,586,482,857)

1,709,809,214

Other Assets & Liabilities, Net

22,023,906

Net Assets

1,731,833,120

Notes to Portfolio of Investments 

(a)

Represents privately placed and other securities and instruments exempt from Securities and Exchange Commission registration (collectively, private placements), such as Section 4(a)(2) and Rule 144A eligible securities, which are often sold only to qualified institutional buyers. At August 31, 2026, the total value of these securities amounted to $817,247,861, which represents 47.19% of total net assets.

(b)

Zero coupon bond.

(c)

Payment-in-kind security. Interest can be paid by issuing additional par of the security or in cash.

(d)

Perpetual security with no specified maturity date.

(e)

The rate shown is the seven-day current annualized yield at August 31, 2026.

(f)

Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The values of the holdings and transactions in these affiliated companies during the period ended August 31, 2026 are as follows:

Affiliated issuers

Beginning

of period($)

Purchases($)

Sales($)

Net change in

unrealized

appreciation

(depreciation)($)

End of

period($)

Realized gain

(loss)($)

Dividends($)

End of

period shares

Columbia Short-Term Cash Fund, 3.871%

54,319,833

481,242,709

(518,424,150

)

(5,890

)

17,132,502

(13,065

)

736,271

17,141,072

Fair value measurements  

The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.

Fair value inputs are summarized in the three broad levels listed below:

■

 Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date.  Valuation adjustments are not applied to Level 1 investments.

■

 Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).

■

 Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).

Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by Columbia Management Investment Advisers, LLC (the Investment Manager), along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.

Investments falling into the Level 3 category, if any, are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Convertible Securities Fund  | 2026

7


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Fair value measurements   (continued)

The Fund’s Board of Trustees (the Board) has designated the Investment Manager, through its Valuation Committee (the Committee), as valuation designee, responsible for determining the fair value of the assets of the Fund for which market quotations are not readily available using valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.

The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third-party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third-party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. Representatives of the Investment Manager report to the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.

The following table is a summary of the inputs used to value the Fund’s investments at August 31, 2026: 

Level 1 ($)

Level 2 ($)

Level 3 ($)

Total ($)

Investments in Securities

Common Stocks

Information Technology

40,452,250

—

—

40,452,250

Real Estate

8,158,800

—

—

8,158,800

Total Common Stocks

48,611,050

—

—

48,611,050

Convertible Bonds

—

1,280,335,188

—

1,280,335,188

Convertible Preferred Stocks

Communication Services

—

105,963,000

—

105,963,000

Consumer Discretionary

—

4,443,400

—

4,443,400

Financials

—

76,653,791

—

76,653,791

Health Care

—

14,772,100

—

14,772,100

Industrials

—

51,136,416

—

51,136,416

Information Technology

—

45,658,066

—

45,658,066

Materials

—

8,793,600

—

8,793,600

Utilities

—

56,310,101

—

56,310,101

Total Convertible Preferred Stocks

—

363,730,474

—

363,730,474

Money Market Funds

17,132,502

—

—

17,132,502

Total Investments in Securities

65,743,552

1,644,065,662

—

1,709,809,214

See the Portfolio of Investments for all investment classifications not indicated in the table.

The Fund’s assets assigned to the Level 2 input category are generally valued using the market approach, in which a security’s value is determined through reference to prices and information from market transactions for similar or identical assets.

The accompanying Notes to Financial Statements are an integral part of this statement.

8

Columbia Convertible Securities Fund  | 2026


Statement of Assets and Liabilities

August 31, 2026 (Unaudited)

Assets

Investments in securities, at value

Unaffiliated issuers (cost $1,569,352,835)

$1,692,676,712

Affiliated issuers (cost $17,130,022)

17,132,502

Receivable for:

Investments sold

19,248,559

Capital shares sold

1,599,284

Dividends

1,735,043

Interest

3,614,998

Expense reimbursement due from Investment Manager

4,520

Prepaid expenses

8,169

Other assets

3,972

Total assets

1,736,023,759

Liabilities

Due to custodian

16,720

Payable for:

Investments purchased

2,930,796

Capital shares redeemed

746,638

Management services fees

107,919

Distribution and/or service fees

8,490

Transfer agent fees

104,326

Compensation of chief compliance officer

132

Compensation of board members

2,813

Other expenses

41,359

Deferred compensation of board members

231,446

Total liabilities

4,190,639

Net assets applicable to outstanding capital stock

$1,731,833,120

Represented by

Paid in capital

1,361,096,668

Total distributable earnings (loss)

370,736,452

Total - representing net assets applicable to outstanding capital stock

$1,731,833,120

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Convertible Securities Fund  | 2026

9


Statement of Assets and Liabilities (continued)

August 31, 2026 (Unaudited)

Class A

Net assets

$327,108,947

Shares outstanding

11,261,316

Net asset value per share

$29.05

Maximum sales charge

5.75%

Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares)

$30.82

Class C

Net assets

$21,284,837

Shares outstanding

737,425

Net asset value per share

$28.86

Institutional Class

Net assets

$743,049,617

Shares outstanding

25,508,215

Net asset value per share

$29.13

Institutional 2 Class

Net assets

$171,310,027

Shares outstanding

5,805,118

Net asset value per share

$29.51

Institutional 3 Class

Net assets

$459,590,182

Shares outstanding

15,355,620

Net asset value per share

$29.93

Class S

Net assets

$9,489,510

Shares outstanding

325,735

Net asset value per share

$29.13

The accompanying Notes to Financial Statements are an integral part of this statement.

10

Columbia Convertible Securities Fund  | 2026


Statement of Operations

Six Months Ended August 31, 2026 (Unaudited)

Net investment income

Income:

Dividends — unaffiliated issuers

$11,807,852

Dividends — affiliated issuers

736,271

Interest

10,758,555

Total income

23,302,678

Expenses:

Management services fees

6,572,557

Distribution and/or service fees

Class A

412,565

Class C

111,734

Transfer agent fees

Class A

145,570

Class C

9,859

Institutional Class

339,864

Institutional 2 Class

46,736

Institutional 3 Class

7,797

Class S

4,328

Custodian fees

6,584

Printing and postage fees

61,056

Registration fees

74,929

Accounting services fees

16,880

Legal fees

18,202

Compensation of chief compliance officer

133

Compensation of board members

12,994

Deferred compensation of board members

23,937

Other

14,769

Total expenses

7,880,494

Fees waived or expenses reimbursed by Investment Manager and its affiliates

(358,263

)

Total net expenses

7,522,231

Net investment income

15,780,447

Realized and unrealized gain (loss) — net

Net realized gain (loss) on:

Investments — unaffiliated issuers

245,915,090

Investments — affiliated issuers

(13,065

)

Net realized gain

245,902,025

Net change in unrealized appreciation (depreciation) on:

Investments — unaffiliated issuers

(102,785,882

)

Investments — affiliated issuers

(5,890

)

Net change in unrealized appreciation (depreciation)

(102,791,772

)

Net realized and unrealized gain

143,110,253

Net increase in net assets resulting from operations

$158,890,700

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Convertible Securities Fund  | 2026

11


Statement of Changes in Net Assets

Six Months Ended

August 31, 2026

(Unaudited)

Year Ended

February 28, 2026

Operations

Net investment income

$15,780,447

$22,864,466

Net realized gain

245,902,025

95,682,803

Net change in unrealized appreciation (depreciation)

(102,791,772

)

209,369,447

Net increase in net assets resulting from operations

158,890,700

327,916,716

Distributions to shareholders

Net investment income and net realized gains

Class A

(11,748,034

)

(4,336,087

)

Class C

(709,653

)

(186,592

)

Institutional Class

(28,631,848

)

(11,509,791

)

Institutional 2 Class

(6,346,480

)

(2,909,954

)

Institutional 3 Class

(15,623,234

)

(4,098,469

)

Class S

(360,490

)

(170,309

)

Total distributions to shareholders

(63,419,739

)

(23,211,202

)

Increase in net assets from capital stock activity

45,817,347

130,222,340

Total increase in net assets

141,288,308

434,927,854

Net assets at beginning of period

1,590,544,812

1,155,616,958

Net assets at end of period

$1,731,833,120

$1,590,544,812

The accompanying Notes to Financial Statements are an integral part of this statement.

12

Columbia Convertible Securities Fund  | 2026


Statement of Changes in Net Assets  (continued)

Six Months Ended

Year Ended

August 31, 2026 (Unaudited)

February 28, 2026

Shares

Dollars ($)

Shares

Dollars ($)

Capital stock activity

Class A

Shares sold

476,118

14,077,589

719,150

17,748,041

Distributions reinvested

262,875

7,989,698

124,921

2,927,275

Shares redeemed

(735,648

)

(21,320,739

)

(1,748,801

)

(41,862,069

)

Net increase (decrease)

3,345

746,548

(904,730

)

(21,186,753

)

Class C

Shares sold

28,730

827,239

48,297

1,160,360

Distributions reinvested

22,392

681,127

7,690

176,690

Shares redeemed

(115,666

)

(3,322,374

)

(331,275

)

(7,805,457

)

Net decrease

(64,544

)

(1,814,008

)

(275,288

)

(6,468,407

)

Institutional Class

Shares sold

3,019,793

88,420,117

5,502,033

136,614,674

Distributions reinvested

882,938

26,850,444

458,105

10,783,908

Shares redeemed

(4,454,478

)

(129,894,616

)

(8,021,395

)

(194,687,211

)

Net decrease

(551,747

)

(14,624,055

)

(2,061,257

)

(47,288,629

)

Institutional 2 Class

Shares sold

732,570

20,761,344

625,129

15,240,065

Distributions reinvested

198,684

6,116,134

115,579

2,754,280

Shares redeemed

(1,051,003

)

(31,081,582

)

(1,791,733

)

(44,505,084

)

Net decrease

(119,749

)

(4,204,104

)

(1,051,025

)

(26,510,739

)

Institutional 3 Class

Shares sold

3,310,692

99,647,664

14,389,673

363,071,640

Distributions reinvested

462,569

14,452,199

139,945

3,589,943

Shares redeemed

(1,595,167

)

(48,019,133

)

(5,081,759

)

(132,083,176

)

Net increase

2,178,094

66,080,730

9,447,859

234,578,407

Class S

Shares sold

1,520

44,942

3,149

76,172

Distributions reinvested

11,859

360,490

7,279

170,309

Shares redeemed

(26,033

)

(773,196

)

(133,412

)

(3,148,020

)

Net decrease

(12,654

)

(367,764

)

(122,984

)

(2,901,539

)

Total net increase

1,432,745

45,817,347

5,032,575

130,222,340

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Convertible Securities Fund  | 2026

13


Financial Highlights

The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The ratios of expenses and net investment income are annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher. A zero balance may reflect an amount rounding to less than $0.01 or 0.01%. 

Net asset value,

beginning of

period

Net

investment

income

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class A

Six Months Ended 8/31/2026 (Unaudited)

$27.37

0.24

2.50

2.74

(0.23

)

(0.83

)

(1.06

)

Year Ended 2/28/2026

$21.88

0.37

5.49

5.86

(0.37

)

—

(0.37

)

Year Ended 2/28/2025

$20.22

0.37

1.72

2.09

(0.43

)

—

(0.43

)

Year Ended 2/29/2024

$19.36

0.46

0.91

1.37

(0.51

)

—

(0.51

)

Year Ended 2/28/2023

$23.74

0.38

(2.93

)

(2.55

)

(0.39

)

(1.44

)

(1.83

)

Year Ended 2/28/2022

$32.01

0.24

(2.84

)

(2.60

)

(0.22

)

(5.45

)

(5.67

)

Class C

Six Months Ended 8/31/2026 (Unaudited)

$27.21

0.12

2.48

2.60

(0.12

)

(0.83

)

(0.95

)

Year Ended 2/28/2026

$21.76

0.19

5.45

5.64

(0.19

)

—

(0.19

)

Year Ended 2/28/2025

$20.10

0.21

1.72

1.93

(0.27

)

—

(0.27

)

Year Ended 2/29/2024

$19.25

0.32

0.90

1.22

(0.37

)

—

(0.37

)

Year Ended 2/28/2023

$23.60

0.22

(2.89

)

(2.67

)

(0.24

)

(1.44

)

(1.68

)

Year Ended 2/28/2022

$31.88

0.03

(2.85

)

(2.82

)

(0.01

)

(5.45

)

(5.46

)

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$27.45

0.27

2.50

2.77

(0.26

)

(0.83

)

(1.09

)

Year Ended 2/28/2026

$21.94

0.43

5.51

5.94

(0.43

)

—

(0.43

)

Year Ended 2/28/2025

$20.27

0.43

1.72

2.15

(0.48

)

—

(0.48

)

Year Ended 2/29/2024

$19.41

0.51

0.91

1.42

(0.56

)

—

(0.56

)

Year Ended 2/28/2023

$23.79

0.43

(2.92

)

(2.49

)

(0.45

)

(1.44

)

(1.89

)

Year Ended 2/28/2022

$32.08

0.31

(2.86

)

(2.55

)

(0.29

)

(5.45

)

(5.74

)

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$27.79

0.28

2.54

2.82

(0.27

)

(0.83

)

(1.10

)

Year Ended 2/28/2026

$22.21

0.44

5.58

6.02

(0.44

)

—

(0.44

)

Year Ended 2/28/2025

$20.51

0.44

1.75

2.19

(0.49

)

—

(0.49

)

Year Ended 2/29/2024

$19.64

0.53

0.91

1.44

(0.57

)

—

(0.57

)

Year Ended 2/28/2023

$24.05

0.46

(2.97

)

(2.51

)

(0.46

)

(1.44

)

(1.90

)

Year Ended 2/28/2022

$32.36

0.33

(2.88

)

(2.55

)

(0.31

)

(5.45

)

(5.76

)

The accompanying Notes to Financial Statements are an integral part of this statement.

14

Columbia Convertible Securities Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class A

Six Months Ended 8/31/2026 (Unaudited)

$29.05

9.84%

1.12%

1.08%

1.60%

106%

$327,109

Year Ended 2/28/2026

$27.37

27.07%

1.15%

1.08%

(c)

1.53%

212%

$308,177

Year Ended 2/28/2025

$21.88

10.43%

1.16%

1.07%

(c)

1.77%

108%

$266,166

Year Ended 2/29/2024

$20.22

7.25%

1.16%

1.09%

(c)

2.38%

72%

$281,630

Year Ended 2/28/2023

$19.36

(10.29%

)

1.14%

(d)

1.12%

(c),(d)

1.88%

59%

$311,254

Year Ended 2/28/2022

$23.74

(9.04%

)

1.10%

(d)

1.10%

(c),(d)

0.83%

92%

$413,074

Class C

Six Months Ended 8/31/2026 (Unaudited)

$28.86

9.38%

1.87%

1.83%

0.85%

106%

$21,285

Year Ended 2/28/2026

$27.21

26.10%

1.90%

1.83%

(c)

0.79%

212%

$21,822

Year Ended 2/28/2025

$21.76

9.67%

1.91%

1.82%

(c)

1.02%

108%

$23,437

Year Ended 2/29/2024

$20.10

6.42%

1.91%

1.84%

(c)

1.63%

72%

$33,250

Year Ended 2/28/2023

$19.25

(10.94%

)

1.89%

(d)

1.87%

(c),(d)

1.10%

59%

$45,631

Year Ended 2/28/2022

$23.60

(9.76%

)

1.85%

(d)

1.85%

(c),(d)

0.09%

92%

$77,910

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$29.13

9.94%

0.87%

0.83%

1.85%

106%

$743,050

Year Ended 2/28/2026

$27.45

27.40%

0.90%

0.83%

(c)

1.78%

212%

$715,297

Year Ended 2/28/2025

$21.94

10.73%

0.91%

0.82%

(c)

2.02%

108%

$616,999

Year Ended 2/29/2024

$20.27

7.50%

0.91%

0.84%

(c)

2.63%

72%

$554,094

Year Ended 2/28/2023

$19.41

(10.04%

)

0.89%

(d)

0.87%

(c),(d)

2.09%

59%

$642,404

Year Ended 2/28/2022

$23.79

(8.84%

)

0.85%

(d)

0.85%

(c),(d)

1.09%

92%

$1,094,312

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$29.51

9.99%

0.84%

0.79%

1.90%

106%

$171,310

Year Ended 2/28/2026

$27.79

27.44%

0.86%

0.79%

1.82%

212%

$164,676

Year Ended 2/28/2025

$22.21

10.79%

0.87%

0.78%

2.06%

108%

$154,947

Year Ended 2/29/2024

$20.51

7.51%

0.86%

0.79%

2.69%

72%

$167,854

Year Ended 2/28/2023

$19.64

(10.00%

)

0.85%

(d)

0.82%

(d)

2.22%

59%

$159,146

Year Ended 2/28/2022

$24.05

(8.77%

)

0.80%

(d)

0.79%

(d)

1.14%

92%

$180,150

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Convertible Securities Fund  | 2026

15


Financial Highlights (continued)

Net asset value,

beginning of

period

Net

investment

income

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$28.18

0.30

2.55

2.85

(0.27

)

(0.83

)

(1.10

)

Year Ended 2/28/2026

$22.51

0.44

5.68

6.12

(0.45

)

—

(0.45

)

Year Ended 2/28/2025

$20.78

0.46

1.77

2.23

(0.50

)

—

(0.50

)

Year Ended 2/29/2024

$19.89

0.55

0.92

1.47

(0.58

)

—

(0.58

)

Year Ended 2/28/2023

$24.32

0.48

(3.00

)

(2.52

)

(0.47

)

(1.44

)

(1.91

)

Year Ended 2/28/2022

$32.66

0.35

(2.92

)

(2.57

)

(0.32

)

(5.45

)

(5.77

)

Class S

Six Months Ended 8/31/2026 (Unaudited)

$27.45

0.27

2.50

2.77

(0.26

)

(0.83

)

(1.09

)

Year Ended 2/28/2026

$21.94

0.43

5.51

5.94

(0.43

)

—

(0.43

)

Year Ended 2/28/2025(e)

$21.35

0.18

0.53

0.71

(0.12

)

—

(0.12

)

Notes to Financial Highlights

(a)

In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.

(b)

Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.

(c)

The benefits derived from expense reductions had an impact of less than 0.01%.

(d)

Ratios include interfund lending expense which is less than 0.01%.

(e)

Class S shares commenced operations on October 2, 2024. Per share data and total return reflect activity from that date.

The accompanying Notes to Financial Statements are an integral part of this statement.

16

Columbia Convertible Securities Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$29.93

9.98%

0.79%

0.75%

1.95%

106%

$459,590

Year Ended 2/28/2026

$28.18

27.53%

0.81%

0.74%

1.73%

212%

$371,283

Year Ended 2/28/2025

$22.51

10.85%

0.82%

0.73%

2.12%

108%

$83,945

Year Ended 2/29/2024

$20.78

7.57%

0.81%

0.74%

2.74%

72%

$231,868

Year Ended 2/28/2023

$19.89

(9.93%

)

0.80%

(d)

0.78%

(d)

2.36%

59%

$116,903

Year Ended 2/28/2022

$24.32

(8.74%

)

0.75%

(d)

0.75%

(d)

1.18%

92%

$101,658

Class S

Six Months Ended 8/31/2026 (Unaudited)

$29.13

9.94%

0.87%

0.83%

1.85%

106%

$9,490

Year Ended 2/28/2026

$27.45

27.40%

0.90%

0.83%

(c)

1.80%

212%

$9,289

Year Ended 2/28/2025

(e)

$21.94

3.32%

0.94%

0.83%

2.01%

108%

$10,123

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Convertible Securities Fund  | 2026

17


Notes to Financial Statements

August 31, 2026 (Unaudited)

Note 1. Organization

Columbia Convertible Securities Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

Fund shares

The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different net investment income distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.

As described in the Fund’s prospectus, Class A and Class C shares are offered to the general public for investment. Class C shares automatically convert to Class A shares after 8 years. Institutional Class, Institutional 2 Class, Institutional 3 Class and Class S shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.

Note 2. Summary of significant accounting policies

Basis of preparation

The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification (Topic 946), Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which require management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

Segment reporting

The intent of FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures is to enable investors to better understand an entity’s overall performance and to assess its potential future cash flows through improved segment disclosures. The chief operating decision maker (CODM) for the Fund is Columbia Management Investment Advisers, LLC through its Investment Oversight Committee and Global Executive Group, which are responsible for assessing performance and making decisions about resource allocation. The CODM has determined that the Fund has a single operating segment because the CODM monitors the operating results of the Fund as a whole and the Fund’s long-term strategic asset allocation is pre-determined in accordance with the terms of its prospectus, based on a defined investment strategy which is executed by the Fund’s portfolio managers as a team. The financial information provided to and reviewed by the CODM is consistent with that presented within the Fund’s financial statements.

Security valuation

Equity securities listed on an exchange are valued at the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. Securities with a closing price not readily available or not listed on any exchange are valued at the mean between the closing bid and ask prices. Listed preferred stocks convertible into common stocks are valued using an evaluated price from a pricing service.

18

Columbia Convertible Securities Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Debt securities generally are valued based on prices obtained from pricing services, which are intended to reflect market transactions for normal, institutional-size trading units of similar securities. The services may use various pricing techniques that take into account, as applicable, factors such as yield, quality, coupon rate, maturity, type of issue, trading characteristics and other data, as well as approved independent broker-dealer quotes. Debt securities for which quotations are not readily available or not believed to be reflective of market value may also be valued based upon a bid quote from an approved independent broker-dealer. Debt securities maturing in 60 days or less are valued primarily at amortized market value, unless this method results in a valuation that management believes does not approximate fair value.

Investments in open-end investment companies (other than exchange-traded funds (ETFs)) are valued at the latest net asset value reported by those companies as of the valuation time. 

Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.

The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.

GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.

Security transactions

Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.

Income recognition

Interest income is recorded on an accrual basis. Market premiums and discounts, including original issue discounts, are amortized and accreted, respectively, over the expected life of the security on all debt securities, unless otherwise noted. For convertible securities, premiums attributable to the conversion feature are not amortized.

The Fund may place a debt security on non-accrual status and reduce related interest income when it becomes probable that the interest will not be collected and the amount of uncollectible interest can be reasonably estimated. The Fund may also adjust accrual rates when it becomes probable the full interest will not be collected and a partial payment will be received. A defaulted debt security is removed from non-accrual status when the issuer resumes interest payments or when collectability of interest is reasonably assured.

Corporate actions and dividend income are recorded on the ex-dividend date.

The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.

Columbia Convertible Securities Fund  | 2026

19


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.

The value of additional securities received as an income payment through a payment-in-kind, if any, is recorded as interest income and increases the cost basis of such securities.

Expenses

General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.

Determination of class net asset value

All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.

Federal income tax status

The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.

Distributions to shareholders

Distributions from net investment income, if any, are declared and paid each calendar quarter. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.

Guarantees and indemnifications

Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.

Note 3. Fees and other transactions with affiliates

Management services fees

The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice and is responsible for administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.82% to 0.65% as the Fund’s net assets increase. The annualized effective management services fee rate for the six months ended August 31, 2026 was 0.76% of the Fund’s average daily net assets.

Compensation of Board members

Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain

20

Columbia Convertible Securities Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund. The expense for the Deferred Plan, which includes Trustees’ fees deferred during the current period as well as any gains or losses on the Trustees’ deferred compensation balances as a result of market fluctuations, is included in "Deferred compensation of board members" in the Statement of Operations.

Compensation of Chief Compliance Officer

The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.

Transfer agency fees

Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with SS&C GIDS, Inc. (SS&C GIDS) to serve as sub-transfer agent. The Transfer Agent pays the fees of SS&C GIDS for services as sub-transfer agent and SS&C GIDS is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).

The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.

The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.

For the six months ended August 31, 2026, the Fund’s annualized effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows: 

Effective rate (%)

Class A

0.09

Class C

0.09

Institutional Class

0.09

Institutional 2 Class

0.05

Institutional 3 Class

0.00

Class S

0.09

An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the six months ended August 31, 2026, no minimum account balance fees were charged by the Fund.

Distribution and service fees

The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the

Columbia Convertible Securities Fund  | 2026

21


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.

Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class C shares of the Fund and a monthly distribution fee to the Distributor at the maximum annual rate of 0.75% of the average daily net assets attributable to Class C shares of the Fund.

Sales charges

Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the six months ended August 31, 2026, if any, are listed below: 

Front End (%)

CDSC (%)

Amount ($)

Class A

5.75

0.50 - 1.00

(a)

95,753

Class C

—

1.00

(b)

1

(a)

This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.

(b)

This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.

The Fund’s other share classes are not subject to sales charges.

Expenses waived/reimbursed by the Investment Manager and its affiliates

The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the classes’ average daily net assets: 

July 1, 2026

through

June 30, 2027 (%)

Prior to

July 1, 2026 (%)

Class A

1.09

1.08

Class C

1.84

1.83

Institutional Class

0.84

0.83

Institutional 2 Class

0.80

0.79

Institutional 3 Class

0.75

0.75

Class S

0.84

0.83

Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, costs associated with shareholder meetings, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.

22

Columbia Convertible Securities Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Note 4. Federal tax information

The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.

At August 31, 2026, the approximate cost of all investments for federal income tax purposes and the aggregate gross approximate unrealized appreciation and depreciation based on that cost was: 

Federal

tax cost ($)

Gross unrealized

appreciation ($)

Gross unrealized

(depreciation) ($)

Net unrealized

appreciation ($)

1,586,483,000

155,817,000

(32,491,000

)

123,326,000

Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.

Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.

Note 5. Portfolio information

The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $1,750,561,871 and $1,770,971,077, respectively, for the six months ended August 31, 2026. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.

Note 6. Affiliated money market fund

The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. The Securities and Exchange Commission has adopted amendments to money market fund rules requiring institutional prime money market funds like the Affiliated MMF to be subject to a discretionary liquidity fee of up to 2% if the imposition of such a fee is determined to be in the best interest of the Affiliated MMF and to a mandatory liquidity fee if daily net redemptions exceed 5% of net assets.

Note 7. Interfund lending

Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.

Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.

The Fund did not borrow or lend money under the Interfund Program during the six months ended August 31, 2026.

Columbia Convertible Securities Fund  | 2026

23


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Note 8. Line of credit

Effective October 22, 2026, the Fund has access to a revolving credit facility with a syndicate of banks led by State Street Bank and Trust Company, Citibank, N.A. and Wells Fargo Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is an agreement between the Fund and certain other funds managed by the Investment Manager, severally and not jointly, permits aggregate borrowings up to $750 million. Interest is currently charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate and (ii) the overnight bank funding rate, plus 1.00% in each case. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in October unless extended or renewed. Prior to October 22, 2026, the Fund had access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A., which permitted aggregate borrowings up to $750 million. Interest was charged to each participating fund based on its borrowings at a rate equal to the highest of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case.

The Fund had no borrowings during the six months ended August 31, 2026.

Note 9. Risks and uncertainties

An investment in the Fund involves risks, including market risk and concentration risk, among others. The value of the Fund’s holdings and the Fund’s net asset value may go down. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally.

Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, other conflicts, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.

To the extent that the Fund concentrates its investment in particular issuers, countries, geographic regions, industries or sectors, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of issuers, countries, geographic regions, industries, sectors or investments.

Additional risk factors of the Fund are described more fully in the Fund’s Prospectus and Statement of Additional Information.

Shareholder concentration risk

At August 31, 2026, one unaffiliated shareholder of record owned 21.8% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Affiliated shareholders of record owned 22.6% of the outstanding shares of the Fund in one or more accounts. Fund shares sold to or redeemed by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.

Note 10. Subsequent events

Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.

24

Columbia Convertible Securities Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Note 11. Information regarding pending and settled legal proceedings

Ameriprise Financial and certain of its affiliates are involved, in the normal course of business, in legal proceedings that include regulatory inquiries, arbitration and litigation (including class actions) concerning matters arising in connection with the conduct of their activities as part of a diversified financial services firm. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.

There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, it is inherently difficult to determine whether any loss is probable or even reasonably possible, or to reasonably estimate the amount of any loss that may result from such matters. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief, and may lead to further claims, examinations, adverse publicity or reputational damage, each of which could have a material adverse effect on the consolidated financial condition or results of operations or financial condition of Ameriprise Financial or one or more of its affiliates that provide services to the Fund.

Columbia Convertible Securities Fund  | 2026

25


 Approval of Management Agreement

(Unaudited)

Columbia Management Investment Advisers, LLC (the Investment Manager, and together with its domestic and global affiliates, Columbia Threadneedle Investments), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial), serves as the investment manager to Columbia Convertible Securities Fund (the Fund). Under a management agreement (the Management Agreement), the Investment Manager provides investment advice and other services to the Fund.  The Investment Manager also provides investment advice and other services to other funds in the Columbia Fund family (collectively, the Funds).

On an annual basis, the Fund’s Board of Trustees (the Board), including the independent Board members (the Independent Trustees), considers renewal of the Management Agreement.  The Investment Manager prepared detailed reports for the Board and its Contracts Committee (including its Contracts Subcommittee) in March, April and June 2026, including reports providing the results of analyses performed by a third-party data provider, Broadridge Financial Solutions, Inc. (Broadridge), and comprehensive responses by the Investment Manager to written requests for information by independent legal counsel to the Independent Trustees (Independent Legal Counsel), to assist the Board in making this determination.  In addition, throughout the year, the Board (or its committees or subcommittees) regularly meets with portfolio management teams and senior management personnel and reviews information prepared by the Investment Manager addressing the services the Investment Manager provides and Fund performance.  The Board also accords appropriate weight to the work, deliberations and conclusions of the various committees (including their subcommittees), such as the Contracts Committee, the Investment Review Committee, the Audit Committee and the Compliance Committee, in determining whether to continue the Management Agreement.

The Board, at its June 18, 2026 Board meeting (the June Meeting), considered the renewal of the Management Agreement for an additional one-year term. At the June Meeting, Independent Legal Counsel reviewed with the Independent Trustees various factors relevant to the Board’s consideration of advisory agreements and the Board’s legal responsibilities related to such consideration. The Independent Trustees considered such information as they, their legal counsel or the Investment Manager believed reasonably necessary to evaluate and to approve the continuation of the Management Agreement. Among other things, the information and factors considered included the following:

•

Information on the investment performance of the Fund relative to the performance of a group of mutual funds determined to be comparable to the Fund by Broadridge, as well as performance relative to one or more benchmarks;

•

Information on the Fund’s management fees and total expenses, including information comparing the Fund’s expenses to those of a group of comparable mutual funds, as determined by Broadridge;

•

The Investment Manager’s agreement to contractually limit or cap total operating expenses for the Fund so that total operating expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses and infrequent and/or unusual expenses) would not exceed a specified annual rate, as a percentage of the Fund’s net assets;

•

Terms of the Management Agreement;

•

Descriptions of other agreements and arrangements with affiliates of the Investment Manager relating to the operations of the Fund, including agreements with respect to the provision of transfer agency and shareholder services to the Fund;

•

Descriptions of various services performed by the Investment Manager under the Management Agreement, including portfolio management and portfolio trading practices;

•

Information regarding any recently negotiated management fees of similarly-managed portfolios of other institutional clients of the Investment Manager;

•

Information regarding the resources of the Investment Manager, including information regarding senior management, portfolio managers and other personnel;

•

Information regarding the capabilities of the Investment Manager with respect to compliance monitoring services;

•

The profitability to the Investment Manager and its affiliates from their relationships with the Fund; and

26

Columbia Convertible Securities Fund  | 2026


Approval of Management Agreement (continued)

(Unaudited)

•

Report provided by the Board’s independent fee consultant, JDL Consultants, LLC (JDL).

Following an analysis and discussion of the foregoing, and the factors identified below, the Board, including all of the Independent Trustees, approved the renewal of the Management Agreement.

Nature, extent and quality of services provided by the Investment Manager

The Board analyzed various reports and presentations it had received detailing the services performed by the Investment Manager, as well as its history, expertise, resources and relative capabilities, and the qualifications of its personnel.

The Board specifically considered the many developments during recent years concerning the services provided by the Investment Manager. Among other things, the Board noted the organization and depth of the equity and credit research departments. The Board further observed the enhancements to the investment risk management department’s processes, systems and oversight over the past several years.  The Board also took into account the broad scope of services provided by the Investment Manager to the Fund, including, among other services, investment, risk and compliance oversight.  The Board also took into account the information it received concerning the Investment Manager’s ability to attract and retain key portfolio management personnel and that it has sufficient resources to provide competitive and adequate compensation to investment personnel.

In connection with the Board’s evaluation of the overall package of services provided by the Investment Manager, the Board also considered the nature, quality and range of administrative services provided to the Fund by the Investment Manager, as well as the achievements in 2025 in the performance of administrative services, and noted the various enhancements anticipated for 2026.  In evaluating the quality of services provided under the Management Agreement, the Board also took into account the organization and strength of the Fund’s and its service providers’ compliance programs.  The Board also reviewed the financial condition of the Investment Manager and its affiliates and each entity’s ability to carry out its responsibilities under the Management Agreement and the Fund’s other service agreements.

In addition, the Board discussed the acceptability of the terms of the Management Agreement, noting that no changes were proposed from the form of agreement previously approved.  The Board also noted the wide array of legal and compliance services provided to the Fund under the Management Agreement.

After reviewing these and related factors (including investment performance as discussed below), the Board concluded, within the context of its overall conclusions, that the nature, extent and quality of the services provided to the Fund under the Management Agreement supported the continuation of the Management Agreement.

Investment performance

The Board carefully reviewed the investment performance of the Fund, including detailed reports providing the results of analyses performed by each of the Investment Manager, Broadridge and JDL collectively showing, for various periods (including since manager inception): (i) the performance of the Fund, (ii) the Fund’s performance relative to peers and benchmarks and (iii) the net assets of the Fund. The Board observed that the Fund’s performance for certain periods ranked above median relative to its peers based on information provided by Broadridge.

The Board also reviewed a description of the third-party data provider’s methodology for identifying the Fund’s peer groups for purposes of performance and expense comparisons. 

The Board also considered the Investment Manager’s performance and reputation generally.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the performance of the Fund and the Investment Manager, in light of other considerations, supported the continuation of the Management Agreement.

Columbia Convertible Securities Fund  | 2026

27


Approval of Management Agreement (continued)

(Unaudited)

Comparative fees, costs of services provided and the profits realized by the Investment Manager and its affiliates from their relationships with the Fund

The Board reviewed comparative fees and the costs of services provided under the Management Agreement.  The Board members considered detailed comparative information set forth in an annual report on fees and expenses, including, among other things, data (based on analyses conducted by Broadridge and JDL) showing a comparison of the Fund’s expenses with median expenses paid by funds in its comparative peer universe, as well as data showing the Fund’s contribution to the Investment Manager’s profitability.

The Board considered the reports of JDL, which assisted in the Board’s analysis of the Funds’ performance and expenses and the reasonableness of the Funds’ fee rates.  The Board accorded particular weight to the notion that a primary objective of the level of fees is to achieve a rational pricing model applied consistently across the various product lines in the Fund family, while assuring that the overall fees for each Fund (with certain exceptions) are generally in line with the current “pricing philosophy” such that Fund total expense ratios, in general, approximate or are lower than the median expense ratios of funds in the same Lipper comparison universe.  The Board took into account that the Fund’s total expense ratio (after considering proposed expense caps/waivers) approximated the peer universe’s median expense ratio.

After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the levels of management fees and expenses of the Fund, in light of other considerations, supported the continuation of the Management Agreement.

The Board also considered the profitability of the Investment Manager and its affiliates in connection with the Investment Manager providing management services to the Fund.  With respect to the profitability of the Investment Manager and its affiliates, the Independent Trustees referred to information discussing the profitability to the Investment Manager and Ameriprise Financial from managing, operating and distributing the Funds.  The Board considered that the profitability generated by the Investment Manager in 2025 had increased slightly from 2024 levels due to a variety of factors, including the increased assets under management of the Funds.  It also took into account the indirect economic benefits flowing to the Investment Manager or its affiliates in connection with managing or distributing the Funds, such as the enhanced ability to offer various other financial products to Ameriprise Financial customers, soft dollar benefits and overall reputational advantages.  The Board noted that the fees paid by the Fund should permit the Investment Manager to offer competitive compensation to its personnel, make necessary investments in its business and earn an appropriate profit.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the costs of services provided and the profitability to the Investment Manager and its affiliates from their relationships with the Fund supported the continuation of the Management Agreement.

Economies of scale

The Board considered the potential existence of economies of scale in the provision by the Investment Manager of services to the Fund, and whether those economies of scale were shared with the Fund through breakpoints in investment management fees or other means, such as expense limitation arrangements and additional investments by the Investment Manager in investment, trading, compliance and other resources. The Board considered the economies of scale that might be realized as the Fund’s net asset level grows and took note of the extent to which Fund shareholders might also benefit from such growth.  In this regard, the Board took into account that management fees decline as Fund assets exceed various breakpoints, all of which have not been surpassed. The Board observed that the Management Agreement thus provides for breakpoints in the management fee rate schedule that allow opportunities for shareholders to realize lower fees as Fund assets grow and that there are additional opportunities through other means for sharing economies of scale with shareholders. 

Conclusion

The Board reviewed all of the above considerations in reaching its decision to approve the continuation of the Management Agreement.  In reaching its conclusions, no single factor was determinative. 

28

Columbia Convertible Securities Fund  | 2026


Approval of Management Agreement (continued)

(Unaudited)

On June 18, 2026, the Board, including all of the Independent Trustees, determined that fees payable under the Management Agreement were fair and reasonable in light of the extent and quality of services provided and approved the renewal of the Management Agreement.

Columbia Convertible Securities Fund  | 2026

29


[THIS PAGE INTENTIONALLY LEFT BLANK]


[THIS PAGE INTENTIONALLY LEFT BLANK]


Columbia Convertible Securities Fund

P.O. Box 219104

Kansas City, MO 64121-9104

  

Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.

Columbia Threadneedle Investments® (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.

© 2026 Columbia Management Investment Advisers, LLC.

columbiathreadneedleus.com/investor/

SAR134_(10/26)



  

Columbia Cornerstone Equity Fund

Semi-Annual Financial Statements and Additional Information

August 31, 2026 (Unaudited)

Not FDIC or NCUA Insured

No Financial Institution Guarantee

May Lose Value


Table of Contents

Portfolio of Investments

3

Statement of Assets and Liabilities

7

Statement of Operations

8

Statement of Changes in Net Assets

9

Financial Highlights

12

Notes to Financial Statements

16

Approval of Management Agreement

27

Columbia Cornerstone Equity Fund | 2026


Portfolio of Investments

August 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

Investments in securities

Common Stocks 99.7%

Issuer

Shares

Value ($)

Communication Services 8.2%

Diversified Telecommunication Services 0.9%

AT&T, Inc.

509,143

13,181,711

Interactive Media & Services 7.3%

Alphabet, Inc., Class C

217,223

72,858,766

Meta Platforms, Inc., Class A

63,461

36,321,269

Total

109,180,035

Total Communication Services

122,361,746

Consumer Discretionary 8.6%

Automobiles 1.4%

General Motors Co.

242,677

20,947,879

Broadline Retail 3.9%

Amazon.com, Inc.(a)

222,880

57,897,538

Hotels, Restaurants & Leisure 2.4%

Hilton Worldwide Holdings, Inc.

57,398

18,153,839

Jersey Mike’s Subs, Inc., Class A(a)

157,524

3,378,890

Royal Caribbean Cruises Ltd.

51,404

13,814,311

Total

35,347,040

Specialty Retail 0.9%

TJX Companies, Inc. (The)

95,944

12,847,861

Total Consumer Discretionary

127,040,318

Consumer Staples 4.8%

Consumer Staples Distribution & Retail 1.7%

Walmart, Inc.

239,872

25,155,377

Household Products 3.1%

Colgate-Palmolive Co.

237,810

21,360,094

Procter & Gamble Co. (The)

170,377

24,725,110

Total

46,085,204

Total Consumer Staples

71,240,581

Energy 2.8%

Oil, Gas & Consumable Fuels 2.8%

Chevron Corp.

119,369

24,606,726

Valero Energy Corp.

48,383

17,365,626

Total

41,972,352

Total Energy

41,972,352

Common Stocks (continued)

Issuer

Shares

Value ($)

Financials 12.4%

Banks 5.6%

Bank of America Corp.

417,822

25,879,895

Citigroup, Inc.

151,137

19,892,652

JPMorgan Chase & Co.

102,467

36,480,301

Total

82,252,848

Capital Markets 3.3%

Charles Schwab Corp. (The)

253,102

27,795,662

Goldman Sachs Group, Inc. (The)

20,597

21,130,462

Total

48,926,124

Financial Services 2.4%

MasterCard, Inc., Class A

60,952

35,919,623

Insurance 1.1%

Chubb Ltd.

49,804

16,863,634

Total Financials

183,962,229

Health Care 11.0%

Biotechnology 3.9%

AbbVie, Inc.

98,842

25,345,066

Insmed, Inc.(a)

88,134

10,736,484

Revolution Medicines, Inc.(a)

50,565

10,394,647

Vertex Pharmaceuticals, Inc.(a)

22,447

12,222,840

Total

58,699,037

Health Care Equipment & Supplies 0.7%

Intuitive Surgical, Inc.(a)

26,031

9,810,043

Health Care Providers & Services 0.6%

Guardant Health, Inc.(a)

52,546

8,355,865

Life Sciences Tools & Services 1.8%

Danaher Corp.

75,351

16,091,959

Illumina, Inc.(a)

51,617

11,026,940

Total

27,118,899

Pharmaceuticals 4.0%

Eli Lilly & Co.

30,061

34,772,461

Merck & Co., Inc.

163,119

24,102,463

Total

58,874,924

Total Health Care

162,858,768

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Cornerstone Equity Fund  | 2026

3


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Industrials 9.8%

Aerospace & Defense 2.7%

Arxis, Inc.(a)

227,297

11,767,166

General Dynamics Corp.

42,919

15,937,971

Karman Holdings, Inc.(a)

280,649

11,632,901

Total

39,338,038

Commercial Services & Supplies 2.4%

Cintas Corp.

99,256

20,028,868

Republic Services, Inc.

73,741

16,290,862

Total

36,319,730

Construction & Engineering 0.3%

MasTec, Inc.(a)

19,078

4,574,523

Electrical Equipment 2.0%

Eaton Corp. PLC

44,193

17,760,283

Vertiv Holdings Co.

47,376

12,257,119

Total

30,017,402

Ground Transportation 1.2%

CSX Corp.

354,034

17,882,257

Machinery 1.2%

Parker-Hannifin Corp.

17,594

17,232,267

Total Industrials

145,364,217

Information Technology 36.5%

Electronic Equipment, Instruments & Components 1.1%

Amphenol Corp., Class A

105,713

16,760,796

IT Services 1.1%

Snowflake, Inc., Class A(a)

47,810

15,845,668

Semiconductors & Semiconductor Equipment 18.7%

Broadcom, Inc.

143,288

53,065,278

Cerebras Systems, Inc., Class A(a)

16,636

3,065,017

Lam Research Corp.

74,342

22,413,370

Microchip Technology, Inc.

234,350

17,213,007

Micron Technology, Inc.

45,556

43,675,904

NVIDIA Corp.

621,255

137,160,679

Total

276,593,255

Common Stocks (continued)

Issuer

Shares

Value ($)

Software 9.6%

CrowdStrike Holdings, Inc., Class A(a)

105,604

24,394,524

Microsoft Corp.

148,987

75,579,615

Palo Alto Networks, Inc.(a)

70,382

26,895,074

ServiceNow, Inc.(a)

108,971

16,126,618

Total

142,995,831

Technology Hardware, Storage & Peripherals 6.0%

Apple, Inc.

279,749

88,638,471

Total Information Technology

540,834,021

Real Estate 1.7%

Specialized REITs 1.7%

Equinix, Inc.

23,936

25,054,290

Total Real Estate

25,054,290

Utilities 3.9%

Electric Utilities 1.2%

Entergy Corp.

174,026

18,500,704

Multi-Utilities 2.7%

Ameren Corp.

186,049

19,723,055

DTE Energy Co.

147,840

20,051,539

Total

39,774,594

Total Utilities

58,275,298

Total Common Stocks

(Cost $717,843,240)

1,478,963,820

Money Market Funds 0.3%

Shares

Value ($)

Columbia Short-Term Cash Fund, 3.871%(b),(c)

5,168,282

5,165,697

Total Money Market Funds

(Cost $5,165,047)

5,165,697

Total Investments in Securities

(Cost: $723,008,287)

1,484,129,517

Other Assets & Liabilities, Net

(628,329

)

Net Assets

1,483,501,188

The accompanying Notes to Financial Statements are an integral part of this statement.

4

Columbia Cornerstone Equity Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Notes to Portfolio of Investments 

(a)

Non-income producing investment.

(b)

The rate shown is the seven-day current annualized yield at August 31, 2026.

(c)

Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The values of the holdings and transactions in these affiliated companies during the period ended August 31, 2026 are as follows:

Affiliated issuers

Beginning

of period($)

Purchases($)

Sales($)

Net change in

unrealized

appreciation

(depreciation)($)

End of

period($)

Capital gain

distributions($)

Realized gain

(loss)($)

Dividends —

affiliated

issuers ($)

End of

period shares

Columbia Research Enhanced Core ETF

1,784,685

1,921,838

(3,480,436

)

(226,087

)

—

—

535,912

—

—

Columbia Short-Term Cash Fund, 3.871%

10,957,340

88,663,088

(94,453,219

)

(1,512

)

5,165,697

—

418

148,847

5,168,282

Total

12,742,025

(227,599

)

5,165,697

—

536,330

148,847

Fair value measurements  

The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.

Fair value inputs are summarized in the three broad levels listed below:

■

 Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date.  Valuation adjustments are not applied to Level 1 investments.

■

 Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).

■

 Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).

Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by Columbia Management Investment Advisers, LLC (the Investment Manager), along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.

Investments falling into the Level 3 category, if any, are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.

The Fund’s Board of Trustees (the Board) has designated the Investment Manager, through its Valuation Committee (the Committee), as valuation designee, responsible for determining the fair value of the assets of the Fund for which market quotations are not readily available using valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.

The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third-party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third-party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. Representatives of the Investment Manager report to the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Cornerstone Equity Fund  | 2026

5


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Fair value measurements   (continued)

The following table is a summary of the inputs used to value the Fund’s investments at August 31, 2026: 

Level 1 ($)

Level 2 ($)

Level 3 ($)

Total ($)

Investments in Securities

Common Stocks

Communication Services

122,361,746

—

—

122,361,746

Consumer Discretionary

127,040,318

—

—

127,040,318

Consumer Staples

71,240,581

—

—

71,240,581

Energy

41,972,352

—

—

41,972,352

Financials

183,962,229

—

—

183,962,229

Health Care

162,858,768

—

—

162,858,768

Industrials

145,364,217

—

—

145,364,217

Information Technology

540,834,021

—

—

540,834,021

Real Estate

25,054,290

—

—

25,054,290

Utilities

58,275,298

—

—

58,275,298

Total Common Stocks

1,478,963,820

—

—

1,478,963,820

Money Market Funds

5,165,697

—

—

5,165,697

Total Investments in Securities

1,484,129,517

—

—

1,484,129,517

See the Portfolio of Investments for all investment classifications not indicated in the table.

The accompanying Notes to Financial Statements are an integral part of this statement.

6

Columbia Cornerstone Equity Fund  | 2026


Statement of Assets and Liabilities

August 31, 2026 (Unaudited)

Assets

Investments in securities, at value

Unaffiliated issuers (cost $717,843,240)

$1,478,963,820

Affiliated issuers (cost $5,165,047)

5,165,697

Receivable for:

Capital shares sold

218,589

Dividends

958,403

Expense reimbursement due from Investment Manager

25,912

Prepaid expenses

6,799

Total assets

1,485,339,220

Liabilities

Payable for:

Capital shares redeemed

1,393,790

Management services fees

88,111

Distribution and/or service fees

6,170

Transfer agent fees

87,423

Compensation of chief compliance officer

118

Compensation of board members

3,138

Other expenses

48,170

Deferred compensation of board members

211,112

Total liabilities

1,838,032

Net assets applicable to outstanding capital stock

$1,483,501,188

Represented by

Paid in capital

531,234,687

Total distributable earnings (loss)

952,266,501

Total - representing net assets applicable to outstanding capital stock

$1,483,501,188

Class A

Net assets

$268,215,602

Shares outstanding

10,381,885

Net asset value per share

$25.83

Maximum sales charge

5.75%

Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares)

$27.41

Class C

Net assets

$7,844,827

Shares outstanding

357,481

Net asset value per share

$21.94

Institutional Class

Net assets

$311,741,404

Shares outstanding

12,191,480

Net asset value per share

$25.57

Institutional 2 Class

Net assets

$175,912,924

Shares outstanding

6,553,388

Net asset value per share

$26.84

Institutional 3 Class

Net assets

$669,404,636

Shares outstanding

26,786,899

Net asset value per share

$24.99

Class S

Net assets

$50,381,795

Shares outstanding

1,969,699

Net asset value per share

$25.58

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Cornerstone Equity Fund  | 2026

7


Statement of Operations

Six Months Ended August 31, 2026 (Unaudited)

Net investment income

Income:

Dividends — unaffiliated issuers

$7,821,378

Dividends — affiliated issuers

148,847

Total income

7,970,225

Expenses:

Management services fees

5,477,403

Distribution and/or service fees

Class A

344,038

Class C

37,871

Transfer agent fees

Class A

152,906

Class C

4,208

Institutional Class

179,782

Institutional 2 Class

54,683

Institutional 3 Class

11,187

Class S

26,963

Custodian fees

6,141

Printing and postage fees

20,140

Registration fees

68,858

Accounting services fees

16,880

Legal fees

16,917

Compensation of chief compliance officer

120

Compensation of board members

12,284

Deferred compensation of board members

20,963

Other

15,755

Total expenses

6,467,099

Fees waived or expenses reimbursed by Investment Manager and its affiliates

(1,579,671

)

Total net expenses

4,887,428

Net investment income

3,082,797

Realized and unrealized gain (loss) — net

Net realized gain (loss) on:

Investments — unaffiliated issuers

195,132,219

Investments — affiliated issuers

536,330

Option contracts written

468,759

Net realized gain

196,137,308

Net change in unrealized appreciation (depreciation) on:

Investments — unaffiliated issuers

(9,977,188

)

Investments — affiliated issuers

(227,599

)

Option contracts written

(152,369

)

Net change in unrealized appreciation (depreciation)

(10,357,156

)

Net realized and unrealized gain

185,780,152

Net increase in net assets resulting from operations

$188,862,949

The accompanying Notes to Financial Statements are an integral part of this statement.

8

Columbia Cornerstone Equity Fund  | 2026


Statement of Changes in Net Assets

Six Months Ended

August 31, 2026

(Unaudited)

Year Ended

February 28, 2026

Operations

Net investment income

$3,082,797

$7,552,474

Net realized gain

196,137,308

91,235,791

Net change in unrealized appreciation (depreciation)

(10,357,156

)

87,613,068

Net increase in net assets resulting from operations

188,862,949

186,401,333

Distributions to shareholders

Net investment income and net realized gains

Class A

(13,704,131

)

(7,737,571

)

Class C

(427,825

)

(258,941

)

Institutional Class

(16,149,731

)

(12,045,371

)

Institutional 2 Class

(8,310,066

)

(8,266,851

)

Institutional 3 Class

(34,673,161

)

(21,647,243

)

Class S

(2,469,630

)

(1,447,068

)

Total distributions to shareholders

(75,734,544

)

(51,403,045

)

Decrease in net assets from capital stock activity

(199,220,697

)

(89,301,794

)

Total increase (decrease) in net assets

(86,092,292

)

45,696,494

Net assets at beginning of period

1,569,593,480

1,523,896,986

Net assets at end of period

$1,483,501,188

$1,569,593,480

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Cornerstone Equity Fund  | 2026

9


Statement of Changes in Net Assets  (continued)

Six Months Ended

Year Ended

August 31, 2026 (Unaudited)

February 28, 2026

Shares

Dollars ($)

Shares

Dollars ($)

Capital stock activity

Class A

Shares sold

351,592

8,800,260

580,242

13,042,129

Distributions reinvested

254,876

6,371,906

160,076

3,575,911

Shares redeemed

(1,373,713

)

(34,716,668

)

(1,658,752

)

(37,288,489

)

Net decrease

(767,245

)

(19,544,502

)

(918,434

)

(20,670,449

)

Class C

Shares sold

17,640

376,794

34,734

662,392

Distributions reinvested

19,976

424,687

13,349

255,937

Shares redeemed

(36,838

)

(780,137

)

(182,128

)

(3,524,545

)

Net increase (decrease)

778

21,344

(134,045

)

(2,606,216

)

Institutional Class

Shares sold

497,793

12,377,350

7,967,319

185,033,659

Distributions reinvested

595,846

14,735,266

500,794

11,222,046

Shares redeemed

(3,200,398

)

(76,873,252

)

(9,295,806

)

(218,144,092

)

Net decrease

(2,106,759

)

(49,760,636

)

(827,693

)

(21,888,387

)

Institutional 2 Class

Shares sold

409,769

10,476,079

1,751,297

40,917,619

Distributions reinvested

320,110

8,310,065

354,759

8,266,851

Shares redeemed

(5,533,591

)

(142,395,605

)

(1,930,501

)

(45,041,359

)

Net increase (decrease)

(4,803,712

)

(123,609,461

)

175,555

4,143,111

Institutional 3 Class

Shares sold

152,397

3,685,224

1,851,759

41,211,249

Distributions reinvested

1,368,453

33,061,812

922,903

20,117,577

Shares redeemed

(1,783,425

)

(43,850,022

)

(4,637,886

)

(106,609,876

)

Net decrease

(262,575

)

(7,102,986

)

(1,863,224

)

(45,281,050

)

Class S

Distributions reinvested

99,823

2,469,629

65,168

1,447,068

Shares redeemed

(68,893

)

(1,694,085

)

(195,464

)

(4,445,871

)

Net increase (decrease)

30,930

775,544

(130,296

)

(2,998,803

)

Total net decrease

(7,908,583

)

(199,220,697

)

(3,698,137

)

(89,301,794

)

The accompanying Notes to Financial Statements are an integral part of this statement.

10

Columbia Cornerstone Equity Fund  | 2026


[THIS PAGE INTENTIONALLY LEFT BLANK]

Columbia Cornerstone Equity Fund  | 2026

11


Financial Highlights

The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The ratios of expenses and net investment income are annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher. A zero balance may reflect an amount rounding to less than $0.01 or 0.01%. 

Net asset value,

beginning of

period

Net

investment

income

(loss)

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class A

Six Months Ended 8/31/2026 (Unaudited)

$23.98

0.02

3.13

3.15

(0.03

)

(1.27

)

(1.30

)

Year Ended 2/28/2026

$22.06

0.05

2.54

2.59

(0.04

)

(0.63

)

(0.67

)

Year Ended 2/28/2025

$20.13

0.05

3.20

3.25

(0.08

)

(1.24

)

(1.32

)

Year Ended 2/29/2024

$15.99

0.13

4.88

5.01

(0.14

)

(0.73

)

(0.87

)

Year Ended 2/28/2023

$18.81

0.13

(2.03

)

(1.90

)

(0.12

)

(0.80

)

(0.92

)

Year Ended 2/28/2022

$17.28

0.11

2.88

2.99

(0.15

)

(1.31

)

(1.46

)

Class C

Six Months Ended 8/31/2026 (Unaudited)

$20.59

(0.07

)

2.69

2.62

(0.00

)

(1.27

)

(1.27

)

Year Ended 2/28/2026

$19.14

(0.10

)

2.18

2.08

—

(0.63

)

(0.63

)

Year Ended 2/28/2025

$17.70

(0.09

)

2.80

2.71

(0.03

)

(1.24

)

(1.27

)

Year Ended 2/29/2024

$14.17

(0.01

)

4.30

4.29

(0.03

)

(0.73

)

(0.76

)

Year Ended 2/28/2023

$16.78

0.01

(1.82

)

(1.81

)

(0.00

)

(0.80

)

(0.80

)

Year Ended 2/28/2022

$15.58

(0.04

)

2.60

2.56

(0.05

)

(1.31

)

(1.36

)

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$23.72

0.05

3.11

3.16

(0.04

)

(1.27

)

(1.31

)

Year Ended 2/28/2026

$21.83

0.10

2.52

2.62

(0.10

)

(0.63

)

(0.73

)

Year Ended 2/28/2025

$19.92

0.11

3.17

3.28

(0.13

)

(1.24

)

(1.37

)

Year Ended 2/29/2024

$15.83

0.17

4.83

5.00

(0.18

)

(0.73

)

(0.91

)

Year Ended 2/28/2023

$18.63

0.17

(2.01

)

(1.84

)

(0.16

)

(0.80

)

(0.96

)

Year Ended 2/28/2022

$17.13

0.15

2.85

3.00

(0.19

)

(1.31

)

(1.50

)

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$24.84

0.06

3.25

3.31

(0.04

)

(1.27

)

(1.31

)

Year Ended 2/28/2026

$22.82

0.12

2.64

2.76

(0.11

)

(0.63

)

(0.74

)

Year Ended 2/28/2025

$20.77

0.13

3.30

3.43

(0.14

)

(1.24

)

(1.38

)

Year Ended 2/29/2024

$16.47

0.19

5.03

5.22

(0.19

)

(0.73

)

(0.92

)

Year Ended 2/28/2023

$19.35

0.19

(2.10

)

(1.91

)

(0.17

)

(0.80

)

(0.97

)

Year Ended 2/28/2022

$17.73

0.17

2.97

3.14

(0.21

)

(1.31

)

(1.52

)

The accompanying Notes to Financial Statements are an integral part of this statement.

12

Columbia Cornerstone Equity Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income (loss)

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class A

Six Months Ended 8/31/2026 (Unaudited)

$25.83

13.30%

1.10%

0.90%

0.15%

40%

$268,216

Year Ended 2/28/2026

$23.98

11.99%

1.10%

0.90%

(c)

0.22%

71%

$267,323

Year Ended 2/28/2025

$22.06

16.25%

1.10%

0.87%

(c)

0.25%

56%

$266,216

Year Ended 2/29/2024

$20.13

31.98%

1.12%

0.83%

(c)

0.71%

61%

$243,348

Year Ended 2/28/2023

$15.99

(9.89%

)

1.12%

(d)

0.80%

(c),(d)

0.81%

55%

$194,560

Year Ended 2/28/2022

$18.81

17.04%

1.12%

(d)

0.79%

(c),(d)

0.54%

58%

$235,276

Class C

Six Months Ended 8/31/2026 (Unaudited)

$21.94

12.90%

1.85%

1.65%

(0.60%

)

40%

$7,845

Year Ended 2/28/2026

$20.59

11.11%

1.85%

1.65%

(c)

(0.52%

)

71%

$7,346

Year Ended 2/28/2025

$19.14

15.44%

1.85%

1.62%

(c)

(0.50%

)

56%

$9,392

Year Ended 2/29/2024

$17.70

30.91%

1.87%

1.58%

(c)

(0.04%

)

61%

$9,290

Year Ended 2/28/2023

$14.17

(10.54%

)

1.88%

(d)

1.55%

(c),(d)

0.06%

55%

$8,243

Year Ended 2/28/2022

$16.78

16.13%

1.87%

(d)

1.54%

(c),(d)

(0.21%

)

58%

$8,739

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$25.57

13.49%

0.85%

0.65%

0.40%

40%

$311,741

Year Ended 2/28/2026

$23.72

12.24%

0.85%

0.65%

(c)

0.46%

71%

$339,199

Year Ended 2/28/2025

$21.83

16.59%

0.85%

0.62%

(c)

0.50%

56%

$330,205

Year Ended 2/29/2024

$19.92

32.29%

0.87%

0.58%

(c)

0.96%

61%

$328,278

Year Ended 2/28/2023

$15.83

(9.65%

)

0.88%

(d)

0.55%

(c),(d)

1.07%

55%

$261,568

Year Ended 2/28/2022

$18.63

17.28%

0.87%

(d)

0.54%

(c),(d)

0.79%

58%

$214,100

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$26.84

13.49%

0.79%

0.59%

0.48%

40%

$175,913

Year Ended 2/28/2026

$24.84

12.34%

0.79%

0.59%

0.53%

71%

$282,084

Year Ended 2/28/2025

$22.82

16.64%

0.80%

0.57%

0.56%

56%

$255,174

Year Ended 2/29/2024

$20.77

32.38%

0.81%

0.51%

1.03%

61%

$213,892

Year Ended 2/28/2023

$16.47

(9.64%

)

0.81%

(d)

0.48%

(d)

1.12%

55%

$184,917

Year Ended 2/28/2022

$19.35

17.45%

0.80%

(d)

0.47%

(d)

0.85%

58%

$198,955

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Cornerstone Equity Fund  | 2026

13


Financial Highlights (continued)

Net asset value,

beginning of

period

Net

investment

income

(loss)

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$23.20

0.06

3.04

3.10

(0.04

)

(1.27

)

(1.31

)

Year Ended 2/28/2026

$21.37

0.13

2.45

2.58

(0.12

)

(0.63

)

(0.75

)

Year Ended 2/28/2025

$19.52

0.13

3.11

3.24

(0.15

)

(1.24

)

(1.39

)

Year Ended 2/29/2024

$15.53

0.19

4.73

4.92

(0.20

)

(0.73

)

(0.93

)

Year Ended 2/28/2023

$18.30

0.19

(1.98

)

(1.79

)

(0.18

)

(0.80

)

(0.98

)

Year Ended 2/28/2022

$16.85

0.17

2.81

2.98

(0.22

)

(1.31

)

(1.53

)

Class S

Six Months Ended 8/31/2026 (Unaudited)

$23.73

0.05

3.11

3.16

(0.04

)

(1.27

)

(1.31

)

Year Ended 2/28/2026

$21.84

0.11

2.51

2.62

(0.10

)

(0.63

)

(0.73

)

Year Ended 2/28/2025(e)

$21.60

0.04

0.91

0.95

(0.07

)

(0.64

)

(0.71

)

Notes to Financial Highlights

(a)

In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.

(b)

Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.

(c)

The benefits derived from expense reductions had an impact of less than 0.01%.

(d)

Ratios include interest on collateral expense which is less than 0.01%.

(e)

Class S shares commenced operations on October 2, 2024. Per share data and total return reflect activity from that date.

The accompanying Notes to Financial Statements are an integral part of this statement.

14

Columbia Cornerstone Equity Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income (loss)

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$24.99

13.55%

0.75%

0.54%

0.50%

40%

$669,405

Year Ended 2/28/2026

$23.20

12.34%

0.74%

0.54%

0.58%

71%

$627,634

Year Ended 2/28/2025

$21.37

16.74%

0.74%

0.52%

0.61%

56%

$617,732

Year Ended 2/29/2024

$19.52

32.41%

0.76%

0.46%

1.07%

61%

$623,513

Year Ended 2/28/2023

$15.53

(9.54%

)

0.76%

(d)

0.43%

(d)

1.17%

55%

$559,371

Year Ended 2/28/2022

$18.30

17.40%

0.75%

(d)

0.42%

(d)

0.92%

58%

$700,548

Class S

Six Months Ended 8/31/2026 (Unaudited)

$25.58

13.48%

0.85%

0.65%

0.40%

40%

$50,382

Year Ended 2/28/2026

$23.73

12.23%

0.85%

0.65%

(c)

0.47%

71%

$46,007

Year Ended 2/28/2025

(e)

$21.84

4.29%

0.87%

0.64%

(c)

0.49%

56%

$45,178

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Cornerstone Equity Fund  | 2026

15


Notes to Financial Statements

August 31, 2026 (Unaudited)

Note 1. Organization

Columbia Cornerstone Equity Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

Fund shares

The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different net investment income distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.

As described in the Fund’s prospectus, Class A and Class C shares are offered to the general public for investment. Class C shares automatically convert to Class A shares after 8 years. Institutional Class, Institutional 2 Class, Institutional 3 Class and Class S shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.

Note 2. Summary of significant accounting policies

Basis of preparation

The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification (Topic 946), Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which require management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

Segment reporting

The intent of FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures is to enable investors to better understand an entity’s overall performance and to assess its potential future cash flows through improved segment disclosures. The chief operating decision maker (CODM) for the Fund is Columbia Management Investment Advisers, LLC through its Investment Oversight Committee and Global Executive Group, which are responsible for assessing performance and making decisions about resource allocation. The CODM has determined that the Fund has a single operating segment because the CODM monitors the operating results of the Fund as a whole and the Fund’s long-term strategic asset allocation is pre-determined in accordance with the terms of its prospectus, based on a defined investment strategy which is executed by the Fund’s portfolio managers as a team. The financial information provided to and reviewed by the CODM is consistent with that presented within the Fund’s financial statements.

Security valuation

Equity securities listed on an exchange are valued at the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. Securities with a closing price not readily available or not listed on any exchange are valued at the mean between the closing bid and ask prices. Listed preferred stocks convertible into common stocks are valued using an evaluated price from a pricing service.

16

Columbia Cornerstone Equity Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Foreign equity securities are valued based on the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy approved by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including relevant general and sector indices, currency fluctuations, depositary receipts, and futures, as applicable, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.

Investments in open-end investment companies (other than exchange-traded funds (ETFs)) are valued at the latest net asset value reported by those companies as of the valuation time. 

Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.

The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.

GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.

Derivative instruments

The Fund invests in certain derivative instruments, as detailed below, in seeking to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional exposure of a financial instrument is the nominal or face amount that is used to calculate payments made on that instrument and/or changes in value for the instrument. The notional exposure is a hypothetical underlying quantity upon which payment obligations are computed. Notional exposures provide a gauge for how the Fund may behave given changes in the underlying rate, asset or reference instrument and individual markets. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.

A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally expected to be limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty provides some protection in the case of clearing member default. The clearinghouse stands between the buyer and the seller of the contract; therefore, the primary counterparty credit risk is the risk of failure of the

Columbia Cornerstone Equity Fund  | 2026

17


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

clearinghouse. However, credit risk still exists in exchange-traded and centrally cleared derivatives with respect to any collateral that is held in a broker’s customer accounts. While clearing brokers are required to segregate customer margin from their own assets, in the event that a clearing broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the clearing broker for all its clients and such shortfall is not remedied by the central counterparty or otherwise, U.S. bankruptcy laws will typically allocate that shortfall on a pro rata basis across all the clearing broker’s customers (including the Fund) by account class, potentially resulting in losses to the Fund.

In connection with certain over-the-counter derivatives, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and forward foreign currency exchange contracts and contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instruments’ payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.

Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or central counterparty for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms for most over-the-counter derivatives are subject to regulatory requirements to exchange variation margin with trading counterparties and may have contract specific margin terms as well. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker or receive interest income on cash collateral pledged to the broker. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.

Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty.  The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement.  In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.

For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.

Options contracts

Options are contracts which entitle the holder to purchase or sell securities or other identified assets at a specified price, or in the case of index option contracts, to receive or pay the difference between the index value and the strike price of the index option contract. Option contracts can be either exchange-traded or over-the-counter. The Fund may use options that are written or purchased to enhance returns or to hedge an existing position or future investment. A Fund may write call and put options on securities and financial derivative instruments it owns or in which it may invest. Writing put options tends to increase a Fund’s exposure to the underlying instrument. Writing call options tends to decrease a Fund’s exposure to the underlying instrument. When a Fund writes a call or put, an amount equal to the premium received is recorded and subsequently marked to market to reflect the current value of the option written. These instruments may be used for other purposes in future periods. Completion of transactions for option contracts traded in the over-the-counter market depends

18

Columbia Cornerstone Equity Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

upon the performance of the other party. Collateral may be collected or posted by the Fund to secure over-the-counter option contract trades. Collateral held or posted by the Fund for such option contract trades must be returned to the broker or the Fund upon closure, exercise or expiration of the contract.

Options contracts purchased are recorded as investments. When the Fund writes an options contract, the premium received is recorded as an asset and an amount equivalent to the premium is recorded as a liability in the Statement of Assets and Liabilities and is subsequently adjusted to reflect the current fair value of the option written. Changes in the fair value of the written option are recorded as unrealized appreciation or depreciation until the contract is exercised or has expired. The Fund realizes a gain or loss when the option contract is closed or expires. When option contracts are exercised, the proceeds on sales for a written call or purchased put option contract, or the purchase cost for a written put or purchased call option contract, is adjusted by the amount of premium received or paid.

For over-the-counter options purchased, the Fund bears the risk of loss of the amount of the premiums paid plus the positive change in market values net of any collateral held by the Fund should the counterparty fail to perform under the contracts. Option contracts written by the Fund do not typically give rise to significant counterparty credit risk, as options written generally obligate the Fund and not the counterparty to perform. The risk in writing a call option contract is that the Fund gives up the opportunity for profit if the market price of the security increases above the strike price and the option contract is exercised. The risk in writing a put option contract is that the Fund may incur a loss if the market price of the security decreases below the strike price and the option contract is exercised. Exercise of a written option could result in the Fund purchasing or selling a security or foreign currency when it otherwise would not, or at a price different from the current market value. In purchasing and writing options, the Fund bears the risk of an unfavorable change in the value of the underlying instrument or the risk that the Fund may not be able to enter into a closing transaction due to an illiquid market.

Effects of derivative transactions in the financial statements

The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.

At August 31, 2026, the Fund had no outstanding derivatives.

The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the six months ended August 31, 2026: 

Amount of realized gain (loss) on derivatives recognized in income

Risk exposure category

Option

contracts

written

($)

Equity risk

468,759

Change in unrealized appreciation (depreciation) on derivatives recognized in income

Risk exposure category

Option

contracts

written

($)

Equity risk

(152,369

)

The following table is a summary of the average daily outstanding volume by derivative instrument for the six months ended August 31, 2026: 

Derivative instrument

Average

value ($)

Option contracts written

(15,770

)

Columbia Cornerstone Equity Fund  | 2026

19


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Security transactions

Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.

Income recognition

Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of an ex-dividend notification in the case of certain foreign securities.

The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.

Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.

Income and capital gain distributions from investments in underlying funds, if any, are recorded on the ex-dividend date.

Expenses

General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.

Determination of class net asset value

All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.

Federal income tax status

The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.

Foreign taxes

The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability in the Statement of Assets and Liabilities.

20

Columbia Cornerstone Equity Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Distributions to shareholders

Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.

Guarantees and indemnifications

Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.

Note 3. Fees and other transactions with affiliates

Management services fees

The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice and is responsible for administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.77% to 0.57% as the Fund’s net assets increase. The annualized effective management services fee rate for the six months ended August 31, 2026 was 0.72% of the Fund’s average daily net assets.

The Investment Manager has contractually agreed to implement a waiver with respect to Fund assets invested in funds that pay a management or advisory fee to the Investment Manager or its affiliate (underlying affiliated funds). Under this arrangement, the Investment Manager waives its net management fee (management fee less reimbursements/waivers) with respect to the Fund in an amount equal to the net management or advisory fee (fee less reimbursement/waivers) payable by an underlying affiliated fund on the assets invested by the Fund in the underlying affiliated fund. 

Compensation of Board members

Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund. The expense for the Deferred Plan, which includes Trustees’ fees deferred during the current period as well as any gains or losses on the Trustees’ deferred compensation balances as a result of market fluctuations, is included in "Deferred compensation of board members" in the Statement of Operations.

Compensation of Chief Compliance Officer

The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.

Columbia Cornerstone Equity Fund  | 2026

21


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Transfer agency fees

Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with SS&C GIDS, Inc. (SS&C GIDS) to serve as sub-transfer agent. The Transfer Agent pays the fees of SS&C GIDS for services as sub-transfer agent and SS&C GIDS is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).

The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.

The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.

For the six months ended August 31, 2026, the Fund’s annualized effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows: 

Effective rate (%)

Class A

0.11

Class C

0.11

Institutional Class

0.11

Institutional 2 Class

0.05

Institutional 3 Class

0.00

Class S

0.11

An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the six months ended August 31, 2026, no minimum account balance fees were charged by the Fund.

Distribution and service fees

The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.

Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class C shares of the Fund and a monthly distribution fee to the Distributor at the maximum annual rate of 0.75% of the average daily net assets attributable to Class C shares of the Fund.

22

Columbia Cornerstone Equity Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Sales charges

Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the six months ended August 31, 2026, if any, are listed below: 

Front End (%)

CDSC (%)

Amount ($)

Class A

5.75

0.50 - 1.00

(a)

11,794

Class C

—

1.00

(b)

173

(a)

This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.

(b)

This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.

The Fund’s other share classes are not subject to sales charges.

Expenses waived/reimbursed by the Investment Manager and its affiliates

The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the classes’ average daily net assets: 

July 1, 2026

through

June 30, 2027 (%)

Prior to

July 1, 2026 (%)

Class A

0.90

0.90

Class C

1.65

1.65

Institutional Class

0.65

0.65

Institutional 2 Class

0.58

0.60

Institutional 3 Class

0.53

0.55

Class S

0.65

0.65

Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, costs associated with shareholder meetings, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.

Note 4. Federal tax information

The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.

At August 31, 2026, the approximate cost of all investments for federal income tax purposes and the aggregate gross approximate unrealized appreciation and depreciation based on that cost was: 

Federal

tax cost ($)

Gross unrealized

appreciation ($)

Gross unrealized

(depreciation) ($)

Net unrealized

appreciation ($)

723,008,000

778,092,000

(16,970,000

)

761,122,000

Columbia Cornerstone Equity Fund  | 2026

23


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.

Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.

Note 5. Portfolio information

The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $597,400,681 and $862,078,777, respectively, for the six months ended August 31, 2026. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.

Note 6. Affiliated money market fund

The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. The Securities and Exchange Commission has adopted amendments to money market fund rules requiring institutional prime money market funds like the Affiliated MMF to be subject to a discretionary liquidity fee of up to 2% if the imposition of such a fee is determined to be in the best interest of the Affiliated MMF and to a mandatory liquidity fee if daily net redemptions exceed 5% of net assets.

Note 7. Interfund lending

Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.

Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.

The Fund did not borrow or lend money under the Interfund Program during the six months ended August 31, 2026.

Note 8. Line of credit

Effective October 22, 2026, the Fund has access to a revolving credit facility with a syndicate of banks led by State Street Bank and Trust Company, Citibank, N.A. and Wells Fargo Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is an agreement between the Fund and certain other funds managed by the Investment Manager, severally and not jointly, permits aggregate borrowings up to $750 million. Interest is currently charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate and (ii) the overnight bank funding rate, plus 1.00% in each case. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in October unless extended or renewed. Prior to October 22, 2026, the Fund had access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A., which permitted aggregate borrowings

24

Columbia Cornerstone Equity Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

up to $750 million. Interest was charged to each participating fund based on its borrowings at a rate equal to the highest of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case.

The Fund had no borrowings during the six months ended August 31, 2026.

Note 9. Risks and uncertainties

An investment in the Fund involves risks, including market risk and concentration risk, among others. The value of the Fund’s holdings and the Fund’s net asset value may go down. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally.

Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, other conflicts, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.

To the extent that the Fund concentrates its investment in particular issuers, countries, geographic regions, industries or sectors, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of issuers, countries, geographic regions, industries, sectors or investments.

Additional risk factors of the Fund are described more fully in the Fund’s Prospectus and Statement of Additional Information.

Shareholder concentration risk

At August 31, 2026, affiliated shareholders of record owned 47.2% of the outstanding shares of the Fund in one or more accounts. Fund shares sold to or redeemed by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.

Note 10. Subsequent events

Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.

Note 11. Information regarding pending and settled legal proceedings

Ameriprise Financial and certain of its affiliates are involved, in the normal course of business, in legal proceedings that include regulatory inquiries, arbitration and litigation (including class actions) concerning matters arising in connection with the conduct of their activities as part of a diversified financial services firm. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.

Columbia Cornerstone Equity Fund  | 2026

25


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, it is inherently difficult to determine whether any loss is probable or even reasonably possible, or to reasonably estimate the amount of any loss that may result from such matters. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief, and may lead to further claims, examinations, adverse publicity or reputational damage, each of which could have a material adverse effect on the consolidated financial condition or results of operations or financial condition of Ameriprise Financial or one or more of its affiliates that provide services to the Fund.

26

Columbia Cornerstone Equity Fund  | 2026


 Approval of Management Agreement

(Unaudited)

Columbia Management Investment Advisers, LLC (the Investment Manager, and together with its domestic and global affiliates, Columbia Threadneedle Investments), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial), serves as the investment manager to Columbia Cornerstone Equity Fund (formerly known as Columbia Select Large Cap Equity Fund) (the Fund). Under a management agreement (the Management Agreement), the Investment Manager provides investment advice and other services to the Fund.  The Investment Manager also provides investment advice and other services to other funds in the Columbia Fund family (collectively, the Funds).

On an annual basis, the Fund’s Board of Trustees (the Board), including the independent Board members (the Independent Trustees), considers renewal of the Management Agreement.  The Investment Manager prepared detailed reports for the Board and its Contracts Committee (including its Contracts Subcommittee) in March, April and June 2026, including reports providing the results of analyses performed by a third-party data provider, Broadridge Financial Solutions, Inc. (Broadridge), and comprehensive responses by the Investment Manager to written requests for information by independent legal counsel to the Independent Trustees (Independent Legal Counsel), to assist the Board in making this determination.  In addition, throughout the year, the Board (or its committees or subcommittees) regularly meets with portfolio management teams and senior management personnel and reviews information prepared by the Investment Manager addressing the services the Investment Manager provides and Fund performance.  The Board also accords appropriate weight to the work, deliberations and conclusions of the various committees (including their subcommittees), such as the Contracts Committee, the Investment Review Committee, the Audit Committee and the Compliance Committee, in determining whether to continue the Management Agreement.

The Board, at its June 18, 2026 Board meeting (the June Meeting), considered the renewal of the Management Agreement for an additional one-year term.  At the June Meeting, Independent Legal Counsel reviewed with the Independent Trustees various factors relevant to the Board’s consideration of advisory agreements and the Board’s legal responsibilities related to such consideration.  The Independent Trustees considered such information as they, their legal counsel or the Investment Manager believed reasonably necessary to evaluate and to approve the continuation of the Management Agreement. Among other things, the information and factors considered included the following:

•

Information on the investment performance of the Fund relative to the performance of a group of mutual funds determined to be comparable to the Fund by Broadridge, as well as performance relative to one or more benchmarks; 

•

Information on the Fund’s management fees and total expenses, including information comparing the Fund’s expenses to those of a group of comparable mutual funds, as determined by Broadridge; 

•

The Investment Manager’s agreement to contractually limit or cap total operating expenses for the Fund so that total operating expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses and infrequent and/or unusual expenses) would not exceed a specified annual rate, as a percentage of the Fund’s net assets;

•

Terms of the Management Agreement;

•

Descriptions of other agreements and arrangements with affiliates of the Investment Manager relating to the operations of the Fund, including agreements with respect to the provision of transfer agency and shareholder services to the Fund;

•

Descriptions of various services performed by the Investment Manager under the Management Agreement, including portfolio management and portfolio trading practices;

•

Information regarding any recently negotiated management fees of similarly-managed portfolios of other institutional clients of the Investment Manager;

•

Information regarding the resources of the Investment Manager, including information regarding senior management, portfolio managers and other personnel;

•

Information regarding the capabilities of the Investment Manager with respect to compliance monitoring services; 

•

The profitability to the Investment Manager and its affiliates from their relationships with the Fund; and

Columbia Cornerstone Equity Fund  | 2026

27


Approval of Management Agreement (continued)

(Unaudited)

•

Report provided by the Board’s independent fee consultant, JDL Consultants, LLC (JDL).

Following an analysis and discussion of the foregoing, and the factors identified below, the Board, including all of the Independent Trustees, approved the renewal of the Management Agreement.

Nature, extent and quality of services provided by the Investment Manager

The Board analyzed various reports and presentations it had received detailing the services performed by the Investment Manager, as well as its history, expertise, resources and relative capabilities, and the qualifications of its personnel.

The Board specifically considered the many developments during recent years concerning the services provided by the Investment Manager. Among other things, the Board noted the organization and depth of the equity and credit research departments. The Board further observed the enhancements to the investment risk management department’s processes, systems and oversight over the past several years.  The Board also took into account the broad scope of services provided by the Investment Manager to the Fund, including, among other services, investment, risk and compliance oversight.  The Board also took into account the information it received concerning the Investment Manager’s ability to attract and retain key portfolio management personnel and that it has sufficient resources to provide competitive and adequate compensation to investment personnel.

In connection with the Board’s evaluation of the overall package of services provided by the Investment Manager, the Board also considered the nature, quality and range of administrative services provided to the Fund by the Investment Manager, as well as the achievements in 2025 in the performance of administrative services, and noted the various enhancements anticipated for 2026.  In evaluating the quality of services provided under the Management Agreement, the Board also took into account the organization and strength of the Fund’s and its service providers’ compliance programs.  The Board also reviewed the financial condition of the Investment Manager and its affiliates and each entity’s ability to carry out its responsibilities under the Management Agreement and the Fund’s other service agreements.

In addition, the Board discussed the acceptability of the terms of the Management Agreement, noting that no changes were proposed from the form of agreement previously approved.  The Board also noted the wide array of legal and compliance services provided to the Fund under the Management Agreement.

After reviewing these and related factors (including investment performance as discussed below), the Board concluded, within the context of its overall conclusions, that the nature, extent and quality of the services provided to the Fund under the Management Agreement supported the continuation of the Management Agreement.

Investment performance

The Board carefully reviewed the investment performance of the Fund, including detailed reports providing the results of analyses performed by each of the Investment Manager, Broadridge and JDL collectively showing, for various periods (including since manager inception): (i) the performance of the Fund, (ii) the Fund’s performance relative to peers and benchmarks and (iii) the net assets of the Fund. The Board observed that the Fund’s performance for certain periods ranked above median relative to its peers based on information provided by Broadridge.

The Board also reviewed a description of the third-party data provider’s methodology for identifying the Fund’s peer groups for purposes of performance and expense comparisons. 

The Board also considered the Investment Manager’s performance and reputation generally.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the performance of the Fund and the Investment Manager, in light of other considerations, supported the continuation of the Management Agreement. 

Comparative fees, costs of services provided and the profits realized by the Investment Manager and its affiliates from their relationships with the Fund

The Board reviewed comparative fees and the costs of services provided under the Management Agreement.  The Board members considered detailed comparative information set forth in an annual report on fees and expenses, including, among other things, data (based on analyses conducted by Broadridge and JDL) showing a comparison of the Fund’s expenses

28

Columbia Cornerstone Equity Fund  | 2026


Approval of Management Agreement (continued)

(Unaudited)

with median expenses paid by funds in its comparative peer universe, as well as data showing the Fund’s contribution to the Investment Manager’s profitability. The Board reviewed the fees charged to comparable institutional or other accounts/vehicles managed by the Investment Manager and discussed differences in how the products are managed and operated, thus explaining many of the differences in fees.

The Board considered the reports of JDL, which assisted in the Board’s analysis of the Funds’ performance and expenses and the reasonableness of the Funds’ fee rates.  The Board accorded particular weight to the notion that a primary objective of the level of fees is to achieve a rational pricing model applied consistently across the various product lines in the Fund family, while assuring that the overall fees for each Fund (with certain exceptions) are generally in line with the current “pricing philosophy” such that Fund total expense ratios, in general, approximate or are lower than the median expense ratios of funds in the same Lipper comparison universe.  The Board took into account that the Fund’s total expense ratio (after considering proposed expense caps/waivers) was below the peer universe’s median expense ratio shown in the reports.

After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the levels of management fees and expenses of the Fund, in light of other considerations, supported the continuation of the Management Agreement.

The Board also considered the profitability of the Investment Manager and its affiliates in connection with the Investment Manager providing management services to the Fund.  With respect to the profitability of the Investment Manager and its affiliates, the Independent Trustees referred to information discussing the profitability to the Investment Manager and Ameriprise Financial from managing, operating and distributing the Funds.  The Board considered that the profitability generated by the Investment Manager in 2025 had increased slightly from 2024 levels due to a variety of factors, including the increased assets under management of the Funds.  It also took into account the indirect economic benefits flowing to the Investment Manager or its affiliates in connection with managing or distributing the Funds, such as the enhanced ability to offer various other financial products to Ameriprise Financial customers, soft dollar benefits and overall reputational advantages.  The Board noted that the fees paid by the Fund should permit the Investment Manager to offer competitive compensation to its personnel, make necessary investments in its business and earn an appropriate profit.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the costs of services provided and the profitability to the Investment Manager and its affiliates from their relationships with the Fund supported the continuation of the Management Agreement.

Economies of scale

The Board considered the potential existence of economies of scale in the provision by the Investment Manager of services to the Fund, and whether those economies of scale were shared with the Fund through breakpoints in investment management fees or other means, such as expense limitation arrangements and additional investments by the Investment Manager in investment, trading, compliance and other resources. The Board considered the economies of scale that might be realized as the Fund’s net asset level grows and took note of the extent to which Fund shareholders might also benefit from such growth.  In this regard, the Board took into account that management fees decline as Fund assets exceed various breakpoints, all of which have not been surpassed. The Board observed that the Management Agreement thus provides for breakpoints in the management fee rate schedule that allow opportunities for shareholders to realize lower fees as Fund assets grow and that there are additional opportunities through other means for sharing economies of scale with shareholders. 

Conclusion

The Board reviewed all of the above considerations in reaching its decision to approve the continuation of the Management Agreement.  In reaching its conclusions, no single factor was determinative. 

On June 18, 2026, the Board, including all of the Independent Trustees, determined that fees payable under the Management Agreement were fair and reasonable in light of the extent and quality of services provided and approved the renewal of the Management Agreement.

Columbia Cornerstone Equity Fund  | 2026

29


[THIS PAGE INTENTIONALLY LEFT BLANK]


[THIS PAGE INTENTIONALLY LEFT BLANK]


Columbia Cornerstone Equity Fund

P.O. Box 219104

Kansas City, MO 64121-9104

  

Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.

Columbia Threadneedle Investments® (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.

© 2026 Columbia Management Investment Advisers, LLC.

columbiathreadneedleus.com/investor/

SAR172_(10/26)



  

Columbia Large Cap Enhanced Core Fund

Semi-Annual Financial Statements and Additional Information

August 31, 2026 (Unaudited)

Not FDIC or NCUA Insured

No Financial Institution Guarantee

May Lose Value


Table of Contents

Portfolio of Investments

3

Statement of Assets and Liabilities

8

Statement of Operations

9

Statement of Changes in Net Assets

10

Financial Highlights

12

Notes to Financial Statements

16

Approval of Management Agreement

26

Columbia Large Cap Enhanced Core Fund | 2026


Portfolio of Investments

August 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

Investments in securities

Common Stocks 99.0%

Issuer

Shares

Value ($)

Communication Services 9.0%

Interactive Media & Services 8.4%

Alphabet, Inc., Class A

85,842

29,130,483

Meta Platforms, Inc., Class A

21,952

12,564,007

Total

41,694,490

Media 0.6%

Fox Corp., Class A

47,953

3,229,635

Total Communication Services

44,924,125

Consumer Discretionary 8.8%

Automobiles 1.9%

General Motors Co.

43,986

3,796,872

Tesla, Inc.(a)

16,013

5,891,983

Total

9,688,855

Broadline Retail 3.3%

Amazon.com, Inc.(a)

62,530

16,243,418

Hotels, Restaurants & Leisure 1.3%

Expedia Group, Inc.

12,080

3,830,810

Las Vegas Sands Corp.

28,211

1,235,924

MGM Resorts International(a)

28,315

1,171,108

Total

6,237,842

Household Durables 0.5%

D.R. Horton, Inc.

16,685

2,411,984

Specialty Retail 0.9%

Ross Stores, Inc.

13,199

3,016,499

TJX Companies, Inc. (The)

10,243

1,371,640

Total

4,388,139

Textiles, Apparel & Luxury Goods 0.9%

Ralph Lauren Corp.

6,494

2,252,768

Tapestry, Inc.

18,076

2,230,398

Total

4,483,166

Total Consumer Discretionary

43,453,404

Consumer Staples 4.4%

Beverages 0.6%

Molson Coors Beverage Co., Class B

78,672

3,127,999

Common Stocks (continued)

Issuer

Shares

Value ($)

Consumer Staples Distribution & Retail 1.1%

Kroger Co. (The)

53,325

3,068,320

Target Corp.

9,184

1,477,522

Walmart, Inc.

8,170

856,788

Total

5,402,630

Food Products 0.7%

Kraft Heinz Co. (The)

124,509

3,196,146

Household Products 1.2%

Colgate-Palmolive Co.

13,341

1,198,289

Procter & Gamble Co. (The)

32,975

4,785,332

Total

5,983,621

Tobacco 0.8%

Altria Group, Inc.

58,471

4,004,094

Total Consumer Staples

21,714,490

Energy 3.6%

Oil, Gas & Consumable Fuels 3.6%

Chevron Corp.

32,695

6,739,747

ExxonMobil Holdings Corp.

44,170

7,109,162

Valero Energy Corp.

11,707

4,201,876

Total

18,050,785

Total Energy

18,050,785

Financials 12.1%

Banks 3.0%

Bank of America Corp.

43,938

2,721,520

Citigroup, Inc.

35,277

4,643,159

JPMorgan Chase & Co.

10,815

3,850,356

U.S. Bancorp

64,035

3,943,275

Total

15,158,310

Capital Markets 3.9%

Cboe Global Markets, Inc.

6,294

1,889,459

Charles Schwab Corp. (The)

42,970

4,718,965

CME Group, Inc.

5,234

1,494,307

Franklin Templeton, Inc.

44,518

1,520,290

Goldman Sachs Group, Inc. (The)

5,246

5,381,871

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Enhanced Core Fund  | 2026

3


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Morgan Stanley

4,455

950,341

T. Rowe Price Group, Inc.

31,754

3,533,585

Total

19,488,818

Consumer Finance 0.8%

Synchrony Financial

49,661

3,827,870

Financial Services 2.5%

Berkshire Hathaway, Inc., Class B(a)

7,685

3,873,471

MasterCard, Inc., Class A

11,607

6,840,121

Visa, Inc., Class A

4,299

1,630,912

Total

12,344,504

Insurance 1.9%

Allstate Corp. (The)

15,754

4,061,381

MetLife, Inc.

40,213

3,827,071

Progressive Corp. (The)

6,185

1,348,825

Total

9,237,277

Total Financials

60,056,779

Health Care 9.0%

Biotechnology 2.2%

AbbVie, Inc.

17,791

4,561,968

Amgen, Inc.

5,958

2,561,225

Regeneron Pharmaceuticals, Inc.

1,073

857,413

Vertex Pharmaceuticals, Inc.(a)

5,836

3,177,819

Total

11,158,425

Health Care Equipment & Supplies 0.3%

Zimmer Biomet Holdings, Inc.

12,958

1,296,318

Health Care Providers & Services 1.3%

Centene Corp.(a)

50,490

3,248,527

CVS Health Corp.

35,512

3,334,932

Total

6,583,459

Life Sciences Tools & Services 1.6%

Charles River Laboratories International, Inc.(a)

11,060

3,187,935

IQVIA Holdings, Inc.(a)

11,199

2,925,067

Revvity, Inc.

12,296

1,582,126

Total

7,695,128

Common Stocks (continued)

Issuer

Shares

Value ($)

Pharmaceuticals 3.6%

Bristol-Myers Squibb Co.

68,773

4,594,724

Eli Lilly & Co.

3,612

4,178,109

Johnson & Johnson

4,562

1,212,808

Pfizer, Inc.

155,664

4,430,197

Viatris, Inc.

203,240

3,355,492

Total

17,771,330

Total Health Care

44,504,660

Industrials 8.3%

Aerospace & Defense 1.6%

General Dynamics Corp.

10,967

4,072,595

Lockheed Martin Corp.

6,889

3,866,314

Total

7,938,909

Air Freight & Logistics 0.7%

FedEx Corp.

11,233

3,677,684

Building Products 1.0%

AO Smith Corp.

55,461

3,279,409

Masco Corp.

21,042

1,518,391

Total

4,797,800

Construction & Engineering 0.3%

Comfort Systems U.S.A., Inc.

1,056

1,632,175

Ground Transportation 0.3%

Uber Technologies, Inc.(a)

21,153

1,600,224

Industrial Conglomerates 0.8%

3M Co.

21,781

3,742,629

Machinery 2.5%

Cummins, Inc.

5,380

3,036,472

Nordson Corp.

12,299

3,956,834

Snap-On, Inc.

8,899

3,437,773

Stanley Black & Decker, Inc.

20,348

1,960,937

Total

12,392,016

Professional Services 1.1%

Automatic Data Processing, Inc.

15,739

4,503,872

Broadridge Financial Solutions, Inc.

5,936

1,082,608

Total

5,586,480

Total Industrials

41,367,917

The accompanying Notes to Financial Statements are an integral part of this statement.

4

Columbia Large Cap Enhanced Core Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Information Technology 37.6%

Communications Equipment 2.6%

Arista Networks, Inc.(a)

18,307

3,582,497

Ciena Corp.(a)

8,672

3,319,642

Cisco Systems, Inc.

44,981

4,969,951

F5, Inc.(a)

2,927

1,191,669

Total

13,063,759

Electronic Equipment, Instruments & Components 0.7%

Keysight Technologies, Inc.(a)

10,983

3,544,214

IT Services 0.3%

Gartner, Inc.(a)

6,815

1,350,120

Semiconductors & Semiconductor Equipment 16.1%

Advanced Micro Devices, Inc.(a)

8,132

3,827,895

Applied Materials, Inc.

7,831

3,589,652

Broadcom, Inc.

36,699

13,591,108

Intel Corp.(a)

10,197

912,733

Lam Research Corp.

18,431

5,556,762

Micron Technology, Inc.

8,616

8,260,418

NVIDIA Corp.

192,681

42,540,111

Teradyne, Inc.

4,679

1,636,855

Total

79,915,534

Software 9.4%

Adobe, Inc.(a)

17,558

5,140,807

Fortinet, Inc.(a)

23,187

3,963,354

Microsoft Corp.(b)

54,599

27,697,526

Palantir Technologies, Inc., Class A(a)

30,797

5,739,945

ServiceNow, Inc.(a)

28,416

4,205,284

Total

46,746,916

Technology Hardware, Storage & Peripherals 8.5%

Apple, Inc.

119,231

37,778,342

Sandisk Corp.(a)

2,183

3,420,106

Seagate Technology Holdings PLC

1,310

1,085,178

Total

42,283,626

Total Information Technology

186,904,169

Common Stocks (continued)

Issuer

Shares

Value ($)

Materials 2.2%

Chemicals 1.0%

CF Industries Holdings, Inc.

28,920

3,760,468

PPG Industries, Inc.

9,679

1,085,693

Total

4,846,161

Construction Materials 0.2%

CRH PLC

12,254

1,155,430

Metals & Mining 1.0%

Newmont Corp.

37,791

4,763,933

Total Materials

10,765,524

Real Estate 1.9%

Hotel & Resort REITs 0.6%

Host Hotels & Resorts, Inc.

131,691

2,887,984

Specialized REITs 1.3%

American Tower Corp.

22,186

3,898,080

Equinix, Inc.

2,756

2,884,760

Total

6,782,840

Total Real Estate

9,670,824

Utilities 2.1%

Electric Utilities 1.5%

Edison International

40,655

2,194,557

Exelon Corp.

72,841

3,184,609

PG&E Corp.

171,283

2,272,925

Total

7,652,091

Independent Power and Renewable Electricity Producers 0.6%

AES Corp. (The)

183,483

2,704,539

Total Utilities

10,356,630

Total Common Stocks

(Cost $255,419,422)

491,769,307

Money Market Funds 1.0%

Shares

Value ($)

Columbia Short-Term Cash Fund, 3.871%(c),(d)

4,683,293

4,680,951

Total Money Market Funds

(Cost $4,680,014)

4,680,951

Total Investments in Securities

(Cost: $260,099,436)

496,450,258

Other Assets & Liabilities, Net

226,556

Net Assets

496,676,814

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Enhanced Core Fund  | 2026

5


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

At August 31, 2026, securities and/or cash totaling $2,498,403 were pledged as collateral.

Investments in derivatives 

Long futures contracts

Description

Number of

contracts

Expiration

date

Trading

currency

Notional

amount

Value/Unrealized

appreciation ($)

Value/Unrealized

depreciation ($)

S&P 500 Index E-mini

15

09/2026

USD

5,774,250

128,455

—

Notes to Portfolio of Investments 

(a)

Non-income producing investment.

(b)

This security or a portion of this security has been pledged as collateral in connection with investments sold short and/or derivative contracts.

(c)

The rate shown is the seven-day current annualized yield at August 31, 2026.

(d)

Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The values of the holdings and transactions in these affiliated companies during the period ended August 31, 2026 are as follows:

Affiliated issuers

Beginning

of period($)

Purchases($)

Sales($)

Net change in

unrealized

appreciation

(depreciation)($)

End of

period($)

Realized gain

(loss)($)

Dividends($)

End of

period shares

Columbia Short-Term Cash Fund, 3.871%

6,354,355

72,276,065

(73,949,766

)

297

4,680,951

(5,105

)

134,954

4,683,293

Currency Legend 

USD

US Dollar

Fair value measurements  

The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.

Fair value inputs are summarized in the three broad levels listed below:

■

 Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date.  Valuation adjustments are not applied to Level 1 investments.

■

 Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).

■

 Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).

Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by Columbia Management Investment Advisers, LLC (the Investment Manager), along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.

Investments falling into the Level 3 category, if any, are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.

The Fund’s Board of Trustees (the Board) has designated the Investment Manager, through its Valuation Committee (the Committee), as valuation designee, responsible for determining the fair value of the assets of the Fund for which market quotations are not readily available using valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.

The accompanying Notes to Financial Statements are an integral part of this statement.

6

Columbia Large Cap Enhanced Core Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Fair value measurements   (continued)

The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third-party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third-party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. Representatives of the Investment Manager report to the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.

The following table is a summary of the inputs used to value the Fund’s investments at August 31, 2026: 

Level 1 ($)

Level 2 ($)

Level 3 ($)

Total ($)

Investments in Securities

Common Stocks

Communication Services

44,924,125

—

—

44,924,125

Consumer Discretionary

43,453,404

—

—

43,453,404

Consumer Staples

21,714,490

—

—

21,714,490

Energy

18,050,785

—

—

18,050,785

Financials

60,056,779

—

—

60,056,779

Health Care

44,504,660

—

—

44,504,660

Industrials

41,367,917

—

—

41,367,917

Information Technology

186,904,169

—

—

186,904,169

Materials

10,765,524

—

—

10,765,524

Real Estate

9,670,824

—

—

9,670,824

Utilities

10,356,630

—

—

10,356,630

Total Common Stocks

491,769,307

—

—

491,769,307

Money Market Funds

4,680,951

—

—

4,680,951

Total Investments in Securities

496,450,258

—

—

496,450,258

Investments in Derivatives

Asset

Futures Contracts

128,455

—

—

128,455

Total

496,578,713

—

—

496,578,713

See the Portfolio of Investments for all investment classifications not indicated in the table.

Derivative instruments are valued at unrealized appreciation (depreciation).

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Enhanced Core Fund  | 2026

7


Statement of Assets and Liabilities

August 31, 2026 (Unaudited)

Assets

Investments in securities, at value

Unaffiliated issuers (cost $255,419,422)

$491,769,307

Affiliated issuers (cost $4,680,014)

4,680,951

Receivable for:

Capital shares sold

109,400

Dividends

517,418

Foreign tax reclaims

1,245

Expense reimbursement due from Investment Manager

15,674

Prepaid expenses

4,231

Other assets

1,775

Total assets

497,100,001

Liabilities

Payable for:

Capital shares redeemed

127,845

Variation margin for futures contracts

17,250

Management services fees

30,797

Distribution and/or service fees

5,175

Transfer agent fees

55,348

Compensation of chief compliance officer

36

Compensation of board members

1,664

Other expenses

31,802

Deferred compensation of board members

153,270

Total liabilities

423,187

Net assets applicable to outstanding capital stock

$496,676,814

Represented by

Paid in capital

232,669,587

Total distributable earnings (loss)

264,007,227

Total - representing net assets applicable to outstanding capital stock

$496,676,814

Class A

Net assets

$75,179,415

Shares outstanding

2,488,714

Net asset value per share

$30.21

Institutional Class

Net assets

$81,938,187

Shares outstanding

2,717,870

Net asset value per share

$30.15

Institutional 3 Class

Net assets

$241,334,710

Shares outstanding

7,989,575

Net asset value per share

$30.21

Class R

Net assets

$87,654,821

Shares outstanding

2,922,867

Net asset value per share

$29.99

Class S

Net assets

$10,569,681

Shares outstanding

350,509

Net asset value per share

$30.16

The accompanying Notes to Financial Statements are an integral part of this statement.

8

Columbia Large Cap Enhanced Core Fund  | 2026


Statement of Operations

Six Months Ended August 31, 2026 (Unaudited)

Net investment income

Income:

Dividends — unaffiliated issuers

$3,167,878

Dividends — affiliated issuers

134,954

Total income

3,302,832

Expenses:

Management services fees

1,805,824

Distribution and/or service fees

Class A

92,424

Class R

155,156

Transfer agent fees

Class A

63,648

Institutional Class

67,980

Institutional 3 Class

4,972

Class R

53,796

Class S

9,966

Custodian fees

4,719

Printing and postage fees

9,902

Registration fees

45,457

Accounting services fees

16,880

Legal fees

10,291

Interest on collateral

239

Compensation of chief compliance officer

36

Compensation of board members

7,296

Deferred compensation of board members

14,494

Other

8,068

Total expenses

2,371,148

Fees waived or expenses reimbursed by Investment Manager and its affiliates

(939,937

)

Total net expenses

1,431,211

Net investment income

1,871,621

Realized and unrealized gain (loss) — net

Net realized gain (loss) on:

Investments — unaffiliated issuers

28,674,318

Investments — affiliated issuers

(5,105

)

Futures contracts

756,476

Net realized gain

29,425,689

Net change in unrealized appreciation (depreciation) on:

Investments — unaffiliated issuers

29,178,858

Investments — affiliated issuers

297

Futures contracts

118,600

Net change in unrealized appreciation (depreciation)

29,297,755

Net realized and unrealized gain

58,723,444

Net increase in net assets resulting from operations

$60,595,065

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Enhanced Core Fund  | 2026

9


Statement of Changes in Net Assets

Six Months Ended

August 31, 2026

(Unaudited)

Year Ended

February 28, 2026

Operations

Net investment income

$1,871,621

$4,162,887

Net realized gain

29,425,689

73,860,876

Net change in unrealized appreciation (depreciation)

29,297,755

4,821,571

Net increase in net assets resulting from operations

60,595,065

82,845,334

Distributions to shareholders

Net investment income and net realized gains

Class A

(4,143,224

)

(8,674,781

)

Institutional Class

(4,549,348

)

(9,708,283

)

Institutional 3 Class

(15,424,886

)

(33,355,156

)

Class R

(2,815,024

)

(5,836,866

)

Class S

(664,823

)

(1,493,833

)

Total distributions to shareholders

(27,597,305

)

(59,068,919

)

Increase (decrease) in net assets from capital stock activity

23,086,701

(41,724,878

)

Total increase (decrease) in net assets

56,084,461

(17,948,463

)

Net assets at beginning of period

440,592,353

458,540,816

Net assets at end of period

$496,676,814

$440,592,353

The accompanying Notes to Financial Statements are an integral part of this statement.

10

Columbia Large Cap Enhanced Core Fund  | 2026


Statement of Changes in Net Assets  (continued)

Six Months Ended

Year Ended

August 31, 2026 (Unaudited)

February 28, 2026

Shares

Dollars ($)

Shares

Dollars ($)

Capital stock activity

Class A

Shares sold

89,188

2,573,562

210,934

5,812,350

Distributions reinvested

105,823

3,044,535

227,500

6,397,171

Shares redeemed

(223,408

)

(6,554,588

)

(450,875

)

(12,816,614

)

Net decrease

(28,397

)

(936,491

)

(12,441

)

(607,093

)

Institutional Class

Shares sold

205,192

6,080,912

324,594

9,269,842

Distributions reinvested

125,477

3,599,926

276,774

7,761,526

Shares redeemed

(263,909

)

(7,695,196

)

(873,339

)

(24,442,523

)

Net increase (decrease)

66,760

1,985,642

(271,971

)

(7,411,155

)

Institutional 3 Class

Shares sold

3,093,728

89,819,862

4,426,574

112,613,185

Distributions reinvested

404,198

11,616,641

886,121

24,799,634

Shares redeemed

(3,778,183

)

(111,701,050

)

(6,019,653

)

(171,085,877

)

Net decrease

(280,257

)

(10,264,547

)

(706,958

)

(33,673,058

)

Class R

Shares sold

1,513,681

43,490,724

278,293

7,816,642

Distributions reinvested

97,557

2,787,214

206,046

5,763,433

Shares redeemed

(419,581

)

(12,144,702

)

(431,738

)

(12,093,389

)

Net increase

1,191,657

34,133,236

52,601

1,486,686

Class S

Shares sold

—

—

1

29

Distributions reinvested

23,164

664,823

53,315

1,493,833

Shares redeemed

(85,202

)

(2,495,962

)

(109,163

)

(3,014,120

)

Net decrease

(62,038

)

(1,831,139

)

(55,847

)

(1,520,258

)

Total net increase (decrease)

887,725

23,086,701

(994,616

)

(41,724,878

)

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Enhanced Core Fund  | 2026

11


Financial Highlights

The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The ratios of expenses and net investment income are annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher. A zero balance may reflect an amount rounding to less than $0.01 or 0.01%. 

Net asset value,

beginning of

period

Net

investment

income

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class A

Six Months Ended 8/31/2026 (Unaudited)

$28.33

0.08

3.50

3.58

(0.01

)

(1.69

)

(1.70

)

Year Ended 2/28/2026

$27.71

0.17

4.09

4.26

(0.21

)

(3.43

)

(3.64

)

Year Ended 2/28/2025

$26.90

0.20

4.27

4.47

(0.22

)

(3.44

)

(3.66

)

Year Ended 2/29/2024

$21.79

0.21

6.06

6.27

(0.23

)

(0.93

)

(1.16

)

Year Ended 2/28/2023

$25.71

0.20

(2.31

)

(2.11

)

(0.18

)

(1.63

)

(1.81

)

Year Ended 2/28/2022

$27.58

0.25

5.49

5.74

(0.26

)

(7.35

)

(7.61

)

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$28.26

0.12

3.48

3.60

(0.02

)

(1.69

)

(1.71

)

Year Ended 2/28/2026

$27.64

0.24

4.09

4.33

(0.28

)

(3.43

)

(3.71

)

Year Ended 2/28/2025

$26.83

0.27

4.27

4.54

(0.29

)

(3.44

)

(3.73

)

Year Ended 2/29/2024

$21.73

0.27

6.05

6.32

(0.29

)

(0.93

)

(1.22

)

Year Ended 2/28/2023

$25.66

0.26

(2.32

)

(2.06

)

(0.24

)

(1.63

)

(1.87

)

Year Ended 2/28/2022

$27.53

0.32

5.49

5.81

(0.33

)

(7.35

)

(7.68

)

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$28.29

0.14

3.50

3.64

(0.03

)

(1.69

)

(1.72

)

Year Ended 2/28/2026

$27.67

0.29

4.09

4.38

(0.33

)

(3.43

)

(3.76

)

Year Ended 2/28/2025

$26.86

0.32

4.26

4.58

(0.33

)

(3.44

)

(3.77

)

Year Ended 2/29/2024

$21.75

0.32

6.05

6.37

(0.33

)

(0.93

)

(1.26

)

Year Ended 2/28/2023

$25.68

0.30

(2.31

)

(2.01

)

(0.29

)

(1.63

)

(1.92

)

Year Ended 2/28/2022

$27.54

0.37

5.51

5.88

(0.39

)

(7.35

)

(7.74

)

Class R

Six Months Ended 8/31/2026 (Unaudited)

$28.16

0.04

3.48

3.52

(0.00

)

(1.69

)

(1.69

)

Year Ended 2/28/2026

$27.57

0.10

4.06

4.16

(0.14

)

(3.43

)

(3.57

)

Year Ended 2/28/2025

$26.78

0.13

4.25

4.38

(0.15

)

(3.44

)

(3.59

)

Year Ended 2/29/2024

$21.70

0.15

6.03

6.18

(0.17

)

(0.93

)

(1.10

)

Year Ended 2/28/2023

$25.61

0.14

(2.29

)

(2.15

)

(0.13

)

(1.63

)

(1.76

)

Year Ended 2/28/2022

$27.50

0.17

5.47

5.64

(0.18

)

(7.35

)

(7.53

)

The accompanying Notes to Financial Statements are an integral part of this statement.

12

Columbia Large Cap Enhanced Core Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class A

Six Months Ended 8/31/2026 (Unaudited)

$30.21

12.95%

1.22%

(c)

0.83%

(c)

0.55%

49%

$75,179

Year Ended 2/28/2026

$28.33

15.77%

1.23%

(c)

0.83%

(c),(d)

0.60%

72%

$71,316

Year Ended 2/28/2025

$27.71

16.75%

1.21%

(c)

0.82%

(c),(d)

0.72%

85%

$70,102

Year Ended 2/29/2024

$26.90

29.42%

1.23%

(c)

0.82%

(c),(d)

0.89%

90%

$62,679

Year Ended 2/28/2023

$21.79

(7.84%

)

1.24%

(c)

0.83%

(c),(d)

0.89%

92%

$50,648

Year Ended 2/28/2022

$25.71

20.15%

1.23%

(c)

0.84%

(c),(d)

0.83%

67%

$61,024

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$30.15

13.06%

0.97%

(c)

0.58%

(c)

0.80%

49%

$81,938

Year Ended 2/28/2026

$28.26

16.08%

0.98%

(c)

0.58%

(c),(d)

0.86%

72%

$74,908

Year Ended 2/28/2025

$27.64

17.06%

0.96%

(c)

0.57%

(c),(d)

0.97%

85%

$80,800

Year Ended 2/29/2024

$26.83

29.76%

0.98%

(c)

0.57%

(c),(d)

1.14%

90%

$76,790

Year Ended 2/28/2023

$21.73

(7.66%

)

0.99%

(c)

0.58%

(c),(d)

1.14%

92%

$66,112

Year Ended 2/28/2022

$25.66

20.49%

0.98%

(c)

0.59%

(c),(d)

1.08%

67%

$88,028

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$30.21

13.19%

0.80%

(c)

0.41%

(c)

0.96%

49%

$241,335

Year Ended 2/28/2026

$28.29

16.24%

0.81%

(c)

0.42%

(c)

1.02%

72%

$233,956

Year Ended 2/28/2025

$27.67

17.21%

0.80%

(c)

0.42%

(c)

1.15%

85%

$248,411

Year Ended 2/29/2024

$26.86

29.99%

0.81%

(c)

0.40%

(c)

1.33%

90%

$200,488

Year Ended 2/28/2023

$21.75

(7.47%

)

0.81%

(c)

0.40%

(c)

1.32%

92%

$172,478

Year Ended 2/28/2022

$25.68

20.73%

0.80%

(c)

0.40%

(c)

1.25%

67%

$193,329

Class R

Six Months Ended 8/31/2026 (Unaudited)

$29.99

12.80%

1.48%

(c)

1.08%

(c)

0.27%

49%

$87,655

Year Ended 2/28/2026

$28.16

15.47%

1.48%

(c)

1.08%

(c),(d)

0.35%

72%

$48,753

Year Ended 2/28/2025

$27.57

16.48%

1.46%

(c)

1.07%

(c),(d)

0.47%

85%

$46,278

Year Ended 2/29/2024

$26.78

29.10%

1.48%

(c)

1.07%

(c),(d)

0.64%

90%

$45,195

Year Ended 2/28/2023

$21.70

(8.08%

)

1.49%

(c)

1.08%

(c),(d)

0.64%

92%

$42,420

Year Ended 2/28/2022

$25.61

19.85%

1.48%

(c)

1.09%

(c),(d)

0.57%

67%

$51,549

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Enhanced Core Fund  | 2026

13


Financial Highlights (continued)

Net asset value,

beginning of

period

Net

investment

income

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class S

Six Months Ended 8/31/2026 (Unaudited)

$28.26

0.12

3.49

3.61

(0.02

)

(1.69

)

(1.71

)

Year Ended 2/28/2026

$27.65

0.24

4.08

4.32

(0.28

)

(3.43

)

(3.71

)

Year Ended 2/28/2025(e)

$28.92

0.11

1.14

1.25

(0.25

)

(2.27

)

(2.52

)

Notes to Financial Highlights

(a)

In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.

(b)

Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.

(c)

Ratios include interest on collateral expense which is less than 0.01%.

(d)

The benefits derived from expense reductions had an impact of less than 0.01%.

(e)

Class S shares commenced operations on October 2, 2024. Per share data and total return reflect activity from that date.

The accompanying Notes to Financial Statements are an integral part of this statement.

14

Columbia Large Cap Enhanced Core Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class S

Six Months Ended 8/31/2026 (Unaudited)

$30.16

13.10%

0.97%

(c)

0.58%

(c)

0.81%

49%

$10,570

Year Ended 2/28/2026

$28.26

16.04%

0.98%

(c)

0.58%

(c),(d)

0.86%

72%

$11,659

Year Ended 2/28/2025

(e)

$27.65

4.02%

0.98%

(c)

0.58%

(c)

0.99%

85%

$12,950

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Enhanced Core Fund  | 2026

15


Notes to Financial Statements

August 31, 2026 (Unaudited)

Note 1. Organization

Columbia Large Cap Enhanced Core Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

Fund shares

The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different net investment income distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.

As described in the Fund’s prospectus, Class A shares are offered to the general public for investment. Institutional Class, Institutional 3 Class, Class R and Class S shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus. 

Note 2. Summary of significant accounting policies

Basis of preparation

The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification (Topic 946), Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which require management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

Segment reporting

The intent of FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures is to enable investors to better understand an entity’s overall performance and to assess its potential future cash flows through improved segment disclosures. The chief operating decision maker (CODM) for the Fund is Columbia Management Investment Advisers, LLC through its Investment Oversight Committee and Global Executive Group, which are responsible for assessing performance and making decisions about resource allocation. The CODM has determined that the Fund has a single operating segment because the CODM monitors the operating results of the Fund as a whole and the Fund’s long-term strategic asset allocation is pre-determined in accordance with the terms of its prospectus, based on a defined investment strategy which is executed by the Fund’s portfolio managers as a team. The financial information provided to and reviewed by the CODM is consistent with that presented within the Fund’s financial statements.

Security valuation

Equity securities listed on an exchange are valued at the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. Securities with a closing price not readily available or not listed on any exchange are valued at the mean between the closing bid and ask prices. Listed preferred stocks convertible into common stocks are valued using an evaluated price from a pricing service.

16

Columbia Large Cap Enhanced Core Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Foreign equity securities are valued based on the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy approved by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including relevant general and sector indices, currency fluctuations, depositary receipts, and futures, as applicable, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.

Investments in open-end investment companies (other than exchange-traded funds (ETFs)) are valued at the latest net asset value reported by those companies as of the valuation time. 

Futures and options on futures contracts are valued based upon the settlement price at the close of regular trading on their principal exchanges or, in the absence of a settlement price, at the mean of the latest quoted bid and ask prices.

Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.

The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.

GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.

Derivative instruments

The Fund invests in certain derivative instruments, as detailed below, in seeking to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional exposure of a financial instrument is the nominal or face amount that is used to calculate payments made on that instrument and/or changes in value for the instrument. The notional exposure is a hypothetical underlying quantity upon which payment obligations are computed. Notional exposures provide a gauge for how the Fund may behave given changes in the underlying rate, asset or reference instrument and individual markets. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.

A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally expected to be limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With

Columbia Large Cap Enhanced Core Fund  | 2026

17


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty provides some protection in the case of clearing member default. The clearinghouse stands between the buyer and the seller of the contract; therefore, the primary counterparty credit risk is the risk of failure of the clearinghouse. However, credit risk still exists in exchange-traded and centrally cleared derivatives with respect to any collateral that is held in a broker’s customer accounts. While clearing brokers are required to segregate customer margin from their own assets, in the event that a clearing broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the clearing broker for all its clients and such shortfall is not remedied by the central counterparty or otherwise, U.S. bankruptcy laws will typically allocate that shortfall on a pro rata basis across all the clearing broker’s customers (including the Fund) by account class, potentially resulting in losses to the Fund.

In connection with certain over-the-counter derivatives, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and forward foreign currency exchange contracts and contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instruments’ payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.

Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or central counterparty for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms for most over-the-counter derivatives are subject to regulatory requirements to exchange variation margin with trading counterparties and may have contract specific margin terms as well. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker or receive interest income on cash collateral pledged to the broker. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.

Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty.  The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement.  In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.

For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.

Futures contracts

Futures contracts are exchange-traded and represent commitments for the future purchase or sale of an asset at a specified price on a specified date. The Fund bought and sold futures contracts to manage its exposure to the securities markets or to movements in interest rates and currency values. A Fund invests in futures contracts as part of its primary investment strategy and/or to equitize its cash flows. Investments in futures contracts may increase or decrease exposure to a particular market. These instruments may be used for other purposes in future periods. Upon entering into futures

18

Columbia Large Cap Enhanced Core Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

contracts, the Fund bears risks that it may not achieve the anticipated benefits of the futures contracts and may realize a loss. Additional risks include counterparty credit risk, the possibility of an illiquid market, and that a change in the value of the contract or option may not correlate with changes in the value of the underlying asset.

Upon entering into a futures contract, the Fund deposits cash or securities with the broker, known as a futures commission merchant (FCM), in an amount sufficient to meet the initial margin requirement. The initial margin deposit must be maintained at an established level over the life of the contract. Cash deposited as initial margin is recorded in the Statement of Assets and Liabilities as margin deposits. Securities deposited as initial margin are designated in the Portfolio of Investments. Subsequent payments (variation margin) are made or received by the Fund each day. The variation margin payments are equal to the daily change in the contract value and are recorded as variation margin receivable or payable and are offset in unrealized gains or losses. The Fund generally expects to earn interest income on its margin deposits. The Fund recognizes a realized gain or loss when the contract is closed or expires. Futures contracts involve, to varying degrees, risk of loss in excess of the variation margin disclosed in the Statement of Assets and Liabilities.

Effects of derivative transactions in the financial statements

The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.

The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at August 31, 2026: 

Asset derivatives

Risk exposure

category

Statement

of assets and liabilities

location

Fair value ($)

Equity risk

Component of total distributable earnings (loss) — unrealized appreciation on futures contracts

128,455

*

*

Includes cumulative appreciation (depreciation) as reported in the tables following the Portfolio of Investments. Only the current day’s variation margin for futures and centrally cleared swaps, if any, is reported in receivables or payables in the Statement of Assets and Liabilities.

The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the six months ended August 31, 2026: 

Amount of realized gain (loss) on derivatives recognized in income

Risk exposure category

Futures

contracts

($)

Equity risk

756,476

Change in unrealized appreciation (depreciation) on derivatives recognized in income

Risk exposure category

Futures

contracts

($)

Equity risk

118,600

The following table is a summary of the average daily outstanding volume by derivative instrument for the six months ended August 31, 2026: 

Derivative instrument

Average notional

amounts ($)

Futures contracts — long

7,732,939

Columbia Large Cap Enhanced Core Fund  | 2026

19


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Security transactions

Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.

Income recognition

Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of an ex-dividend notification in the case of certain foreign securities.

The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.

Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.

Expenses

General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.

Determination of class net asset value

All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.

Federal income tax status

The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.

Foreign taxes

The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability in the Statement of Assets and Liabilities.

20

Columbia Large Cap Enhanced Core Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Distributions to shareholders

Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.

Guarantees and indemnifications

Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.

Note 3. Fees and other transactions with affiliates

Management services fees

The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice and is responsible for administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.75% to 0.55% as the Fund’s net assets increase. The annualized effective management services fee rate for the six months ended August 31, 2026 was 0.75% of the Fund’s average daily net assets.

Compensation of Board members

Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund. The expense for the Deferred Plan, which includes Trustees’ fees deferred during the current period as well as any gains or losses on the Trustees’ deferred compensation balances as a result of market fluctuations, is included in "Deferred compensation of board members" in the Statement of Operations.

Compensation of Chief Compliance Officer

The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.

Transfer agency fees

Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with SS&C GIDS, Inc. (SS&C GIDS) to serve as sub-transfer agent. The Transfer Agent pays the fees of SS&C GIDS for services as sub-transfer agent and SS&C GIDS is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).

Columbia Large Cap Enhanced Core Fund  | 2026

21


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.

The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 3 Class shares are subject to an annual limitation of not more than 0.02% of the average daily net assets attributable to Institutional 3 Class shares.

For the six months ended August 31, 2026, the Fund’s annualized effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows: 

Effective rate (%)

Class A

0.17

Institutional Class

0.17

Institutional 3 Class

0.00

Class R

0.17

Class S

0.17

An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the six months ended August 31, 2026, no minimum account balance fees were charged by the Fund.

Distribution and service fees

The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.

Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly distribution fee to the Distributor at the maximum annual rate of 0.50% of the average daily net assets attributable to Class R shares of the Fund.

Expenses waived/reimbursed by the Investment Manager and its affiliates

The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the classes’ average daily net assets: 

July 1, 2026

through

June 30, 2027 (%)

Prior to

July 1, 2026 (%)

Class A

0.83

0.83

Institutional Class

0.58

0.58

Institutional 3 Class

0.41

0.42

Class R

1.08

1.08

Class S

0.58

0.58

22

Columbia Large Cap Enhanced Core Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, costs associated with shareholder meetings, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.

Note 4. Federal tax information

The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.

At August 31, 2026, the approximate cost of all investments for federal income tax purposes and the aggregate gross approximate unrealized appreciation and depreciation based on that cost was: 

Federal

tax cost ($)

Gross unrealized

appreciation ($)

Gross unrealized

(depreciation) ($)

Net unrealized

appreciation ($)

260,099,000

242,447,000

(5,967,000

)

236,480,000

Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.

Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.

Note 5. Portfolio information

The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $229,369,356 and $229,485,013, respectively, for the six months ended August 31, 2026. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.

Note 6. Affiliated money market fund

The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. The Securities and Exchange Commission has adopted amendments to money market fund rules requiring institutional prime money market funds like the Affiliated MMF to be subject to a discretionary liquidity fee of up to 2% if the imposition of such a fee is determined to be in the best interest of the Affiliated MMF and to a mandatory liquidity fee if daily net redemptions exceed 5% of net assets.

Columbia Large Cap Enhanced Core Fund  | 2026

23


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Note 7. Interfund lending

Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.

Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.

The Fund did not borrow or lend money under the Interfund Program during the six months ended August 31, 2026.

Note 8. Line of credit

Effective October 22, 2026, the Fund has access to a revolving credit facility with a syndicate of banks led by State Street Bank and Trust Company, Citibank, N.A. and Wells Fargo Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is an agreement between the Fund and certain other funds managed by the Investment Manager, severally and not jointly, permits aggregate borrowings up to $750 million. Interest is currently charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate and (ii) the overnight bank funding rate, plus 1.00% in each case. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in October unless extended or renewed. Prior to October 22, 2026, the Fund had access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A., which permitted aggregate borrowings up to $750 million. Interest was charged to each participating fund based on its borrowings at a rate equal to the highest of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case.

The Fund had no borrowings during the six months ended August 31, 2026.

Note 9. Risks and uncertainties

An investment in the Fund involves risks, including market risk and concentration risk, among others. The value of the Fund’s holdings and the Fund’s net asset value may go down. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally.

Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, other conflicts, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.

To the extent that the Fund concentrates its investment in particular issuers, countries, geographic regions, industries or sectors, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of issuers, countries, geographic regions, industries, sectors or investments.

Additional risk factors of the Fund are described more fully in the Fund’s Prospectus and Statement of Additional Information.

24

Columbia Large Cap Enhanced Core Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Shareholder concentration risk

At August 31, 2026, one unaffiliated shareholder of record owned 20.3% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Affiliated shareholders of record owned 22.0% of the outstanding shares of the Fund in one or more accounts. Fund shares sold to or redeemed by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.

Note 10. Subsequent events

Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.

Note 11. Information regarding pending and settled legal proceedings

Ameriprise Financial and certain of its affiliates are involved, in the normal course of business, in legal proceedings that include regulatory inquiries, arbitration and litigation (including class actions) concerning matters arising in connection with the conduct of their activities as part of a diversified financial services firm. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.

There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, it is inherently difficult to determine whether any loss is probable or even reasonably possible, or to reasonably estimate the amount of any loss that may result from such matters. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief, and may lead to further claims, examinations, adverse publicity or reputational damage, each of which could have a material adverse effect on the consolidated financial condition or results of operations or financial condition of Ameriprise Financial or one or more of its affiliates that provide services to the Fund.

Columbia Large Cap Enhanced Core Fund  | 2026

25


 Approval of Management Agreement

(Unaudited)

Columbia Management Investment Advisers, LLC (the Investment Manager, and together with its domestic and global affiliates, Columbia Threadneedle Investments), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial), serves as the investment manager to Columbia Large Cap Enhanced Core Fund (the Fund). Under a management agreement (the Management Agreement), the Investment Manager provides investment advice and other services to the Fund. The Investment Manager also provides investment advice and other services to other funds in the Columbia Fund family (collectively, the Funds).

On an annual basis, the Fund’s Board of Trustees (the Board), including the independent Board members (the Independent Trustees), considers renewal of the Management Agreement. The Investment Manager prepared detailed reports for the Board and its Contracts Committee (including its Contracts Subcommittee) in March, April and June 2026, including reports providing the results of analyses performed by a third-party data provider, Broadridge Financial Solutions, Inc. (Broadridge), and comprehensive responses by the Investment Manager to written requests for information by independent legal counsel to the Independent Trustees (Independent Legal Counsel), to assist the Board in making this determination. In addition, throughout the year, the Board (or its committees or subcommittees) regularly meets with portfolio management teams and senior management personnel and reviews information prepared by the Investment Manager addressing the services the Investment Manager provides and Fund performance. The Board also accords appropriate weight to the work, deliberations and conclusions of the various committees (including their subcommittees), such as the Contracts Committee, the Investment Review Committee, the Audit Committee and the Compliance Committee, in determining whether to continue the Management Agreement.

The Board, at its June 18, 2026 Board meeting (the June Meeting), considered the renewal of the Management Agreement for an additional one-year term. At the June Meeting, Independent Legal Counsel reviewed with the Independent Trustees various factors relevant to the Board’s consideration of advisory agreements and the Board’s legal responsibilities related to such consideration. The Independent Trustees considered such information as they, their legal counsel or the Investment Manager believed reasonably necessary to evaluate and to approve the continuation of the Management Agreement. Among other things, the information and factors considered included the following:

•

Information on the investment performance of the Fund relative to the performance of a group of mutual funds determined to be comparable to the Fund by Broadridge, as well as performance relative to one or more benchmarks; 

•

Information on the Fund’s management fees and total expenses, including information comparing the Fund’s expenses to those of a group of comparable mutual funds, as determined by Broadridge; 

•

The Investment Manager’s agreement to contractually limit or cap total operating expenses for the Fund so that total operating expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses and infrequent and/or unusual expenses) would not exceed a specified annual rate, as a percentage of the Fund’s net assets;

•

Terms of the Management Agreement;

•

Descriptions of other agreements and arrangements with affiliates of the Investment Manager relating to the operations of the Fund, including agreements with respect to the provision of transfer agency and shareholder services to the Fund;

•

Descriptions of various services performed by the Investment Manager under the Management Agreement, including portfolio management and portfolio trading practices;

•

Information regarding any recently negotiated management fees of similarly-managed portfolios of other institutional clients of the Investment Manager;

•

Information regarding the resources of the Investment Manager, including information regarding senior management, portfolio managers and other personnel;

•

Information regarding the capabilities of the Investment Manager with respect to compliance monitoring services; 

•

The profitability to the Investment Manager and its affiliates from their relationships with the Fund; and

26

Columbia Large Cap Enhanced Core Fund  | 2026


Approval of Management Agreement (continued)

(Unaudited)

•

Report provided by the Board’s independent fee consultant, JDL Consultants, LLC (JDL).

Following an analysis and discussion of the foregoing, and the factors identified below, the Board, including all of the Independent Trustees, approved the renewal of the Management Agreement.

Nature, extent and quality of services provided by the Investment Manager

The Board analyzed various reports and presentations it had received detailing the services performed by the Investment Manager, as well as its history, expertise, resources and relative capabilities, and the qualifications of its personnel.

The Board specifically considered the many developments during recent years concerning the services provided by the Investment Manager. Among other things, the Board noted the organization and depth of the equity and credit research departments. The Board further observed the enhancements to the investment risk management department’s processes, systems and oversight over the past several years. The Board also took into account the broad scope of services provided by the Investment Manager to the Fund, including, among other services, investment, risk and compliance oversight. The Board also took into account the information it received concerning the Investment Manager’s ability to attract and retain key portfolio management personnel and that it has sufficient resources to provide competitive and adequate compensation to investment personnel.

In connection with the Board’s evaluation of the overall package of services provided by the Investment Manager, the Board also considered the nature, quality and range of administrative services provided to the Fund by the Investment Manager, as well as the achievements in 2025 in the performance of administrative services, and noted the various enhancements anticipated for 2026. In evaluating the quality of services provided under the Management Agreement, the Board also took into account the organization and strength of the Fund’s and its service providers’ compliance programs. The Board also reviewed the financial condition of the Investment Manager and its affiliates and each entity’s ability to carry out its responsibilities under the Management Agreement and the Fund’s other service agreements.

In addition, the Board discussed the acceptability of the terms of the Management Agreement, noting that no changes were proposed from the form of agreement previously approved. The Board also noted the wide array of legal and compliance services provided to the Fund under the Management Agreement.

After reviewing these and related factors (including investment performance as discussed below), the Board concluded, within the context of its overall conclusions, that the nature, extent and quality of the services provided to the Fund under the Management Agreement supported the continuation of the Management Agreement.

Investment performance

The Board carefully reviewed the investment performance of the Fund, including detailed reports providing the results of analyses performed by each of the Investment Manager, Broadridge and JDL collectively showing, for various periods (including since manager inception): (i) the performance of the Fund, (ii) the Fund’s performance relative to peers and benchmarks, and (iii) the net assets of the Fund. The Board observed that the Fund’s performance for certain periods ranked above median relative to its peers based on information provided by Broadridge.

The Board also reviewed a description of the third-party data provider’s methodology for identifying the Fund’s peer groups for purposes of performance and expense comparisons. 

The Board also considered the Investment Manager’s performance and reputation generally. After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the performance of the Fund and the Investment Manager, in light of other considerations, supported the continuation of the Management Agreement. 

Columbia Large Cap Enhanced Core Fund  | 2026

27


Approval of Management Agreement (continued)

(Unaudited)

Comparative fees, costs of services provided and the profits realized by the Investment Manager and its affiliates from their relationships with the Fund

The Board reviewed comparative fees and the costs of services provided under the Management Agreement. The Board members considered detailed comparative information set forth in an annual report on fees and expenses, including, among other things, data (based on analyses conducted by Broadridge and JDL) showing a comparison of the Fund’s expenses with median expenses paid by funds in its comparative peer universe, as well as data showing the Fund’s contribution to the Investment Manager’s profitability. 

The Board considered the reports of JDL, which assisted in the Board’s analysis of the Funds’ performance and expenses and the reasonableness of the Funds’ fee rates. The Board accorded particular weight to the notion that a primary objective of the level of fees is to achieve a rational pricing model applied consistently across the various product lines in the Fund family, while assuring that the overall fees for each Fund (with certain exceptions) are generally in line with the current “pricing philosophy” such that Fund total expense ratios, in general, approximate or are lower than the median expense ratios of funds in the same Lipper comparison universe. The Board took into account that the Fund’s total expense ratio (after considering proposed expense caps/waivers) was below the peer universe’s median expense ratio shown in the reports. 

After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the levels of management fees and expenses of the Fund, in light of other considerations, supported the continuation of the Management Agreement.

The Board also considered the profitability of the Investment Manager and its affiliates in connection with the Investment Manager providing management services to the Fund.  With respect to the profitability of the Investment Manager and its affiliates, the Independent Trustees referred to information discussing the profitability to the Investment Manager and Ameriprise Financial from managing, operating and distributing the Funds. The Board considered that the profitability generated by the Investment Manager in 2025 had increased slightly from 2024 levels due to a variety of factors, including the increased assets under management of the Funds. It also took into account the indirect economic benefits flowing to the Investment Manager or its affiliates in connection with managing or distributing the Funds, such as the enhanced ability to offer various other financial products to Ameriprise Financial customers, soft dollar benefits and overall reputational advantages. The Board noted that the fees paid by the Fund should permit the Investment Manager to offer competitive compensation to its personnel, make necessary investments in its business and earn an appropriate profit. After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the costs of services provided and the profitability to the Investment Manager and its affiliates from their relationships with the Fund supported the continuation of the Management Agreement.

Economies of scale

The Board considered the potential existence of economies of scale in the provision by the Investment Manager of services to the Fund, and whether those economies of scale were shared with the Fund through breakpoints in investment management fees or other means, such as expense limitation arrangements and additional investments by the Investment Manager in investment, trading, compliance and other resources. The Board considered the economies of scale that might be realized as the Fund’s net asset level grows and took note of the extent to which Fund shareholders might also benefit from such growth. In this regard, the Board took into account that management fees decline as Fund assets exceed various breakpoints, all of which have not been surpassed. The Board observed that the Management Agreement thus provides for breakpoints in the management fee rate schedule that allow opportunities for shareholders to realize lower fees as Fund assets grow and that there are additional opportunities through other means for sharing economies of scale with shareholders. 

Conclusion

The Board reviewed all of the above considerations in reaching its decision to approve the continuation of the Management Agreement. In reaching its conclusions, no single factor was determinative. 

28

Columbia Large Cap Enhanced Core Fund  | 2026


Approval of Management Agreement (continued)

(Unaudited)

On June 18, 2026, the Board, including all of the Independent Trustees, determined that fees payable under the Management Agreement were fair and reasonable in light of the extent and quality of services provided and approved the renewal of the Management Agreement.

Columbia Large Cap Enhanced Core Fund  | 2026

29


[THIS PAGE INTENTIONALLY LEFT BLANK]


[THIS PAGE INTENTIONALLY LEFT BLANK]


Columbia Large Cap Enhanced Core Fund

P.O. Box 219104

Kansas City, MO 64121-9104

  

Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.

Columbia Threadneedle Investments® (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.

© 2026 Columbia Management Investment Advisers, LLC.

columbiathreadneedleus.com/investor/

SAR173_(10/26)



  

Columbia Large Cap Index Fund

Semi-Annual Financial Statements and Additional Information

August 31, 2026 (Unaudited)

Not FDIC or NCUA Insured

No Financial Institution Guarantee

May Lose Value


Table of Contents

Portfolio of Investments

3

Statement of Assets and Liabilities

15

Statement of Operations

16

Statement of Changes in Net Assets

17

Financial Highlights

18

Notes to Financial Statements

20

Approval of Management Agreement

30

Columbia Large Cap Index Fund | 2026


Portfolio of Investments

August 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

Investments in securities

Common Stocks 98.9%

Issuer

Shares

Value ($)

Communication Services 9.4%

Diversified Telecommunication Services 0.7%

AT&T, Inc.

313,268

8,110,509

Comcast Corp., Class A

160,629

4,275,944

Verizon Communications, Inc.

188,256

9,416,565

Total

21,803,018

Entertainment 1.0%

Live Nation Entertainment, Inc.(a)

7,134

1,283,335

Netflix, Inc.(a)

189,844

15,386,856

Take-Two Interactive Software, Inc.(a)

7,848

1,724,206

TKO Group Holdings, Inc.

2,839

518,430

Walt Disney Co. (The)

78,292

8,420,304

Warner Bros Discovery, Inc.(a)

111,739

3,187,914

Total

30,521,045

Interactive Media & Services 7.3%

Alphabet, Inc., Class A

264,364

89,711,923

Alphabet, Inc., Class C

213,090

71,472,517

Meta Platforms, Inc., Class A

99,009

56,666,811

Reddit, Inc., Class A(a)

5,886

870,010

Total

218,721,261

Media 0.3%

AppLovin Corp.(a)

12,130

3,785,288

Charter Communications, Inc., Class A(a)

5,159

786,438

EchoStar Corp., Class A(a)

6,144

531,088

Fox Corp., Class A

8,994

605,746

Fox Corp., Class B

6,269

377,519

News Corp., Class A

16,451

505,210

News Corp., Class B

5,432

186,915

Omnicom Group, Inc.

12,850

1,124,760

Paramount Skydance Corp., Class B

14,221

155,151

Trade Desk, Inc. (The), Class A(a)

19,251

264,124

Total

8,322,239

Wireless Telecommunication Services 0.1%

T-Mobile US, Inc.

20,980

3,785,631

Total Communication Services

283,153,194

Common Stocks (continued)

Issuer

Shares

Value ($)

Consumer Discretionary 9.0%

Automobile Components 0.0%

Aptiv PLC(a)

9,541

427,055

Automobiles 1.7%

Ford Motor Co.

176,456

2,459,797

General Motors Co.

40,652

3,509,081

Tesla, Inc.(a)

126,928

46,703,157

Total

52,672,035

Broadline Retail 3.9%

Amazon.com, Inc.(a)

441,337

114,646,113

eBay, Inc.

20,018

2,073,064

Total

116,719,177

Distributors 0.0%

Genuine Parts Co.

6,205

841,832

Hotels, Restaurants & Leisure 1.6%

Airbnb, Inc., Class A(a)

18,842

3,452,231

Booking Holdings, Inc.

34,935

6,955,209

Carnival Corp., Ltd.

58,000

1,385,620

Chipotle Mexican Grill, Inc.(a)

57,832

2,199,351

Darden Restaurants, Inc.

5,164

1,106,439

Domino’s Pizza, Inc.

1,380

472,043

DoorDash, Inc., Class A(a)

17,062

3,953,948

Expedia Group, Inc.

5,162

1,636,973

Hilton Worldwide Holdings, Inc.

10,264

3,246,298

Las Vegas Sands Corp.

13,443

588,938

Marriott International, Inc., Class A

9,867

3,372,146

McDonald’s Corp.

32,033

8,441,977

MGM Resorts International(a)

8,651

357,805

Norwegian Cruise Line Holdings Ltd.(a)

20,699

334,082

Royal Caribbean Cruises Ltd.

11,245

3,021,981

Starbucks Corp.

51,384

5,459,550

Wynn Resorts Ltd.

3,781

345,130

Yum! Brands, Inc.

12,426

1,905,030

Total

48,234,751

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Index Fund  | 2026

3


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Household Durables 0.2%

D.R. Horton, Inc.

11,890

1,718,818

Garmin Ltd.

7,391

2,099,857

Lennar Corp., Class A

9,704

816,204

NVR, Inc.(a)

122

770,458

PulteGroup, Inc.

8,588

1,084,836

Total

6,490,173

Leisure Products 0.0%

Hasbro, Inc.

6,060

570,246

Specialty Retail 1.4%

AutoZone, Inc.(a)

743

2,222,491

Best Buy Co., Inc.

8,834

708,045

Carvana Co.(a)

32,294

2,372,317

Home Depot, Inc. (The)

44,906

14,721,534

Lowe’s Companies, Inc.

25,251

5,168,880

O’Reilly Automotive, Inc.(a)

37,363

3,317,835

Ross Stores, Inc.

14,524

3,319,315

TJX Companies, Inc. (The)

49,856

6,676,217

Tractor Supply Co.

23,645

825,211

Ulta Beauty, Inc.(a)

1,964

1,054,864

Williams-Sonoma, Inc.

5,308

1,211,551

Total

41,598,260

Textiles, Apparel & Luxury Goods 0.2%

Deckers Outdoor Corp.(a)

6,400

557,312

lululemon athletica, Inc.(a)

4,721

567,747

NIKE, Inc., Class B

54,080

2,112,365

Ralph Lauren Corp.

1,743

604,647

Tapestry, Inc.

9,109

1,123,959

Total

4,966,030

Total Consumer Discretionary

272,519,559

Consumer Staples 4.4%

Beverages 1.0%

Brown-Forman Corp., Class B

7,591

201,693

Coca-Cola Co. (The)

174,580

15,480,009

Constellation Brands, Inc., Class A

6,288

821,338

Keurig Dr. Pepper, Inc.

61,341

1,954,324

Molson Coors Beverage Co., Class B

7,233

287,584

Common Stocks (continued)

Issuer

Shares

Value ($)

Monster Beverage Corp.(a)

64,377

2,956,192

PepsiCo, Inc.

61,621

8,647,891

Total

30,349,031

Consumer Staples Distribution & Retail 1.6%

Casey’s General Stores, Inc.

1,666

1,253,182

Costco Wholesale Corp.

20,002

18,879,688

Dollar General Corp.

9,929

1,258,501

Dollar Tree, Inc.(a)

8,165

1,033,607

Kroger Co. (The)

25,574

1,471,528

Sysco Corp.

21,559

1,748,003

Target Corp.

20,477

3,294,340

Walmart, Inc.

197,655

20,728,080

Total

49,666,929

Food Products 0.4%

Archer-Daniels-Midland Co.

21,729

1,766,350

Bunge Global SA

6,123

711,554

General Mills, Inc.

24,061

991,313

Hershey Co. (The)

6,683

1,177,612

Hormel Foods Corp.

13,149

287,306

JM Smucker Co. (The)

4,808

630,617

Kraft Heinz Co. (The)

38,492

988,090

McCormick & Co., Inc.

11,451

620,873

Mondelez International, Inc., Class A

57,874

3,592,239

Tyson Foods, Inc., Class A

12,719

701,326

Total

11,467,280

Household Products 0.7%

Church & Dwight Co., Inc.

10,683

1,065,950

Clorox Co. (The)

5,452

532,551

Colgate-Palmolive Co.

36,077

3,240,436

Kimberly-Clark Corp.

14,966

1,615,580

Procter & Gamble Co. (The)

104,985

15,235,423

Total

21,689,940

Personal Care Products 0.1%

Estee Lauder Companies, Inc. (The), Class A

11,149

1,140,543

Kenvue, Inc.

86,564

1,634,328

Total

2,774,871

The accompanying Notes to Financial Statements are an integral part of this statement.

4

Columbia Large Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Tobacco 0.6%

Altria Group, Inc.

75,287

5,155,654

Philip Morris International, Inc.

70,268

13,161,196

Total

18,316,850

Total Consumer Staples

134,264,901

Energy 3.4%

Energy Equipment & Services 0.3%

Baker Hughes Co.

44,728

2,842,464

Halliburton Co.

37,664

1,387,918

SLB Ltd.

67,405

4,051,041

Total

8,281,423

Oil, Gas & Consumable Fuels 3.1%

APA Corp.

15,936

687,638

Chevron Corp.

84,404

17,399,041

ConocoPhillips Co.

54,927

7,277,278

Devon Energy Corp.

51,981

2,521,598

Diamondback Energy, Inc.

8,751

1,754,401

EOG Resources, Inc.

24,014

3,481,069

EQT Corp.

28,200

1,527,876

Expand Energy Corp.

10,786

1,058,754

ExxonMobil Holdings Corp.

186,875

30,077,531

Kinder Morgan, Inc.

88,270

2,845,825

Marathon Petroleum Corp.

13,163

4,914,011

Occidental Petroleum Corp.

32,736

1,970,053

ONEOK, Inc.

28,405

2,727,164

Phillips 66

18,076

4,457,180

Targa Resources Corp.

9,677

2,841,651

Texas Pacific Land Corp.

2,612

977,776

Valero Energy Corp.

13,387

4,804,862

Williams Companies, Inc. (The)

55,139

4,138,182

Total

95,461,890

Total Energy

103,743,313

Financials 12.2%

Banks 3.5%

Bank of America Corp.

294,355

18,232,349

Citigroup, Inc.

76,896

10,121,052

Citizens Financial Group, Inc.

19,066

1,313,075

Fifth Third Bancorp

40,861

2,197,096

Common Stocks (continued)

Issuer

Shares

Value ($)

Huntington Bancshares, Inc.

91,393

1,524,892

JPMorgan Chase & Co.

120,807

43,009,708

KeyCorp

41,550

897,895

M&T Bank Corp.

6,602

1,544,472

PNC Financial Services Group, Inc. (The)

18,105

4,338,501

Regions Financial Corp.

38,475

1,149,633

Truist Financial Corp.

56,172

2,785,008

U.S. Bancorp

69,986

4,309,738

Wells Fargo & Co.

137,969

11,919,142

Total

103,342,561

Capital Markets 3.2%

Ameriprise Financial, Inc.(b)

4,053

2,241,755

Ares Management Corp., Class A

9,510

1,361,547

Bank of New York Mellon Corp. (The)

30,945

4,990,810

Blackrock, Inc.

6,509

7,521,866

Blackstone, Inc.

33,493

4,797,537

Cboe Global Markets, Inc.

4,718

1,416,344

Charles Schwab Corp. (The)

73,705

8,094,283

CME Group, Inc.

16,337

4,664,214

Coinbase Global, Inc., Class A(a)

10,028

1,886,467

FactSet Research Systems, Inc.

1,642

514,849

Franklin Templeton, Inc.

13,822

472,021

Goldman Sachs Group, Inc. (The)

13,300

13,644,470

Interactive Brokers Group, Inc., Class A

20,085

1,954,070

Intercontinental Exchange, Inc.

25,496

4,097,207

Invesco Ltd.

19,986

655,141

KKR & Co., Inc., Class A

31,170

3,419,972

Moody’s Corp.

6,774

3,418,431

Morgan Stanley

54,045

11,528,879

MSCI, Inc.

3,282

1,872,840

Nasdaq, Inc.

20,143

1,986,301

Northern Trust Corp.

8,343

1,548,127

Raymond James Financial, Inc.

7,820

1,393,289

Robinhood Markets, Inc., Class A(a)

35,671

3,738,678

S&P Global, Inc.

13,670

5,957,935

State Street Corp.

12,478

2,388,040

T. Rowe Price Group, Inc.

9,660

1,074,965

Total

96,640,038

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Index Fund  | 2026

5


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Consumer Finance 0.5%

American Express Co.

23,995

7,922,429

Capital One Financial Corp.

28,056

6,018,293

Synchrony Financial

15,165

1,168,918

Total

15,109,640

Financial Services 3.4%

Apollo Global Management, Inc.

20,794

2,840,044

Berkshire Hathaway, Inc., Class B(a)

82,656

41,661,104

Block, Inc., Class A(a)

24,129

1,979,061

Corpay, Inc.(a)

2,947

1,191,472

Fidelity National Information Services, Inc.

23,304

950,104

Fiserv, Inc.(a)

24,042

1,281,679

Global Payments, Inc.

10,483

954,477

Jack Henry & Associates, Inc.

3,203

537,816

MasterCard, Inc., Class A

36,378

21,437,919

PayPal Holdings, Inc.

39,770

2,094,487

Visa, Inc., Class A

74,828

28,387,498

Total

103,315,661

Insurance 1.6%

Aflac, Inc.

20,653

2,392,650

Allstate Corp. (The)

11,606

2,992,027

American International Group, Inc.

23,904

1,825,309

Aon PLC, Class A

9,629

3,095,916

Arch Capital Group Ltd.(a)

15,689

1,538,620

Arthur J Gallagher & Co.

11,582

3,036,221

Assurant, Inc.

2,234

629,675

Brown & Brown, Inc.

13,142

948,458

Chubb Ltd.

16,263

5,506,652

Cincinnati Financial Corp.

6,974

1,184,883

Erie Indemnity Co., Class A

1,145

292,616

Everest Group Ltd.

1,784

668,376

Globe Life, Inc.

3,501

604,518

Hartford Insurance Group, Inc. (The)

12,359

1,697,879

Loews Corp.

7,607

823,762

Marsh & McLennan Companies, Inc.

21,722

4,122,836

MetLife, Inc.

24,368

2,319,102

Principal Financial Group, Inc.

8,862

976,238

Progressive Corp. (The)

26,345

5,745,318

Common Stocks (continued)

Issuer

Shares

Value ($)

Prudential Financial, Inc.

15,645

1,839,852

Travelers Companies, Inc. (The)

9,587

3,508,171

Willis Towers Watson PLC

4,258

1,441,546

WR Berkley Corp.

13,259

895,778

Total

48,086,403

Total Financials

366,494,303

Health Care 9.2%

Biotechnology 1.8%

AbbVie, Inc.

79,656

20,425,392

Amgen, Inc.

24,333

10,460,270

Biogen, Inc.(a)

6,656

1,442,022

Gilead Sciences, Inc.

55,976

8,191,528

Incyte Corp.(a)

7,566

932,283

Moderna, Inc.(a)

15,921

2,234,353

Regeneron Pharmaceuticals, Inc.

4,505

3,599,855

Vertex Pharmaceuticals, Inc.(a)

11,443

6,230,942

Total

53,516,645

Health Care Equipment & Supplies 1.5%

Abbott Laboratories

78,530

8,666,571

Align Technology, Inc.(a)

3,003

479,849

Baxter International, Inc.

23,285

605,410

Becton Dickinson & Co.

12,423

2,336,890

Boston Scientific Corp.(a)

67,012

3,236,680

Cooper Cos, Inc. (The)(a)

8,797

616,582

DexCom, Inc.(a)

17,397

1,584,171

Edwards Lifesciences Corp.(a)

25,960

2,355,870

GE HealthCare Technologies, Inc.

20,509

1,460,856

IDEXX Laboratories, Inc.(a)

3,556

1,979,590

Insulet Corp.(a)

3,123

464,265

Intuitive Surgical, Inc.(a)

15,967

6,017,324

Medtronic PLC

57,884

5,247,184

ResMed, Inc.

6,540

1,570,254

Solventum Corp.(a)

6,636

604,274

STERIS PLC

4,422

1,028,734

Stryker Corp.

15,555

5,036,709

Zimmer Biomet Holdings, Inc.

8,722

872,549

Total

44,163,762

The accompanying Notes to Financial Statements are an integral part of this statement.

6

Columbia Large Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Health Care Providers & Services 1.6%

Cardinal Health, Inc.

10,559

2,477,353

Cencora, Inc.

8,772

2,838,619

Centene Corp.(a)

21,150

1,360,791

Cigna Group (The)

11,926

3,292,530

CVS Health Corp.

57,525

5,402,173

DaVita, Inc.(a)

1,447

254,686

Elevance Health, Inc.

9,791

3,843,359

HCA Healthcare, Inc.

7,001

2,901,564

Henry Schein, Inc.(a)

4,366

392,067

Humana, Inc.

5,413

2,074,424

Labcorp Holdings, Inc.

3,697

1,229,844

McKesson Corp.

5,419

4,797,549

Quest Diagnostics, Inc.

4,991

1,199,337

UnitedHealth Group, Inc.

40,944

15,944,003

Universal Health Services, Inc., Class B

2,402

409,133

Total

48,417,432

Health Care Technology 0.0%

Veeva Systems Inc., Class A(a)

6,769

1,933,836

Life Sciences Tools & Services 0.9%

Agilent Technologies, Inc.

12,741

1,956,508

Bio-Techne Corp.

7,059

510,436

Charles River Laboratories International, Inc.(a)

2,172

626,057

Danaher Corp.

28,400

6,065,104

IQVIA Holdings, Inc.(a)

7,525

1,965,455

Mettler-Toledo International, Inc.(a)

911

1,280,083

Revvity, Inc.

5,030

647,210

Thermo Fisher Scientific, Inc.

16,755

10,339,511

Waters Corp.(a)

4,427

1,835,567

West Pharmaceutical Services, Inc.

3,185

1,086,435

Total

26,312,366

Pharmaceuticals 3.4%

Bristol-Myers Squibb Co.

92,067

6,150,996

Eli Lilly & Co.

35,665

41,254,775

Johnson & Johnson

108,530

28,852,701

Merck & Co., Inc.

111,352

16,453,372

Pfizer, Inc.

256,961

7,313,110

Common Stocks (continued)

Issuer

Shares

Value ($)

Viatris, Inc.

52,504

866,841

Zoetis, Inc.

18,901

1,457,267

Total

102,349,062

Total Health Care

276,693,103

Industrials 8.2%

Aerospace & Defense 2.1%

Axon Enterprise, Inc.(a)

3,634

2,058,879

Boeing Co. (The)(a)

35,541

7,384,709

General Dynamics Corp.

11,444

4,249,730

General Electric Co.

47,039

15,791,463

Honeywell Aerospace, Inc.(a)

14,284

2,258,443

Howmet Aerospace, Inc.

18,039

4,418,653

Huntington Ingalls Industries, Inc.

1,777

517,462

L3Harris Technologies, Inc.

8,399

2,236,234

Lockheed Martin Corp.

9,148

5,134,132

Northrop Grumman Corp.

6,019

3,248,454

RTX Corp.

60,715

12,612,327

Textron, Inc.

7,840

631,591

TransDigm Group, Inc.

2,522

2,955,128

Total

63,497,205

Air Freight & Logistics 0.3%

CH Robinson Worldwide, Inc.

5,314

795,293

Expeditors International of Washington, Inc.

5,897

1,118,366

FedEx Corp.

9,897

3,240,278

United Parcel Service, Inc., Class B

33,660

3,508,382

Total

8,662,319

Building Products 0.4%

Allegion PLC

3,874

601,439

AO Smith Corp.

5,048

298,488

Builders FirstSource, Inc.(a)

4,849

321,974

Carrier Global Corp.

35,200

2,049,344

Johnson Controls International PLC

27,507

3,802,568

Lennox International, Inc.

1,428

546,410

Masco Corp.

9,095

656,295

Trane Technologies PLC

9,966

4,428,890

Total

12,705,408

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Index Fund  | 2026

7


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Commercial Services & Supplies 0.4%

Cintas Corp.

15,332

3,093,844

Copart, Inc.(a)

39,956

1,318,148

Republic Services, Inc.

9,016

1,991,815

Rollins, Inc.

13,241

477,603

Veralto Corp.

11,073

1,091,466

Waste Management, Inc.

16,658

3,646,769

Total

11,619,645

Construction & Engineering 0.3%

Comfort Systems U.S.A., Inc.

1,584

2,448,262

EMCOR Group, Inc.

2,004

1,472,018

Quanta Services, Inc.

6,765

4,106,964

Total

8,027,244

Electrical Equipment 1.1%

AMETEK, Inc.

10,334

2,430,247

Eaton Corp. PLC

17,507

7,035,713

Emerson Electric Co.

25,252

3,849,415

GE Vernova, Inc.

12,115

10,885,691

Generac Holdings, Inc.(a)

2,654

491,999

Hubbell, Inc.

2,382

1,079,046

Rockwell Automation, Inc.

5,017

2,129,365

Vertiv Holdings Co.

17,318

4,480,513

Total

32,381,989

Ground Transportation 0.8%

CSX Corp.

83,774

4,231,425

FedEx Freight Holding Co., Inc.(a)

4,901

655,460

JB Hunt Transport Services, Inc.

3,359

891,714

Norfolk Southern Corp.

10,127

3,471,434

Old Dominion Freight Line, Inc.

8,251

1,649,870

Uber Technologies, Inc.(a)

91,775

6,942,779

Union Pacific Corp.

26,769

8,048,635

Total

25,891,317

Industrial Conglomerates 0.3%

3M Co.

23,515

4,040,582

DuPont de Nemours, Inc.

6,160

829,074

Honeywell International, Inc.

14,284

3,050,063

Total

7,919,719

Common Stocks (continued)

Issuer

Shares

Value ($)

Machinery 1.7%

Caterpillar, Inc.

20,766

16,560,262

Cummins, Inc.

6,221

3,511,132

Deere & Co.

11,325

7,416,856

Dover Corp.

6,071

1,179,170

Fortive Corp.

13,745

808,756

IDEX Corp.

3,337

762,972

Illinois Tool Works, Inc.

11,804

3,250,467

Ingersoll Rand, Inc.

16,056

1,237,115

Nordson Corp.

2,389

768,589

Otis Worldwide Corp.

17,300

1,230,549

PACCAR, Inc.

23,728

2,945,357

Parker-Hannifin Corp.

5,685

5,568,116

Pentair PLC

7,286

440,512

Snap-On, Inc.

2,335

902,034

Stanley Black & Decker, Inc.

7,009

675,457

Westinghouse Air Brake Technologies Corp.

7,650

2,187,364

Xylem, Inc.

10,716

1,179,939

Total

50,624,647

Passenger Airlines 0.1%

Delta Air Lines, Inc.

29,460

2,297,880

Southwest Airlines Co.

22,037

849,085

United Airlines Holdings, Inc.(a)

14,633

1,580,218

Total

4,727,183

Professional Services 0.4%

Automatic Data Processing, Inc.

18,022

5,157,176

Broadridge Financial Solutions, Inc.

5,214

950,929

Equifax, Inc.

5,368

1,015,411

Jacobs Solutions, Inc.

5,324

793,542

Leidos Holdings, Inc.

5,671

795,131

Mobility Global, Inc.

0

0

Paychex, Inc.

14,538

1,851,269

Verisk Analytics, Inc.

5,907

1,144,658

Total

11,708,116

The accompanying Notes to Financial Statements are an integral part of this statement.

8

Columbia Large Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Trading Companies & Distributors 0.3%

Fastenal Co.

51,759

2,552,236

Ferguson Enterprises, Inc.

8,744

1,963,116

United Rentals, Inc.

2,824

2,931,312

W.W. Grainger, Inc.

1,958

2,563,981

Total

10,010,645

Total Industrials

247,775,437

Information Technology 37.5%

Communications Equipment 1.3%

Arista Networks, Inc.(a)

46,552

9,109,761

Ciena Corp.(a)

6,375

2,440,350

Cisco Systems, Inc.

178,081

19,676,169

F5, Inc.(a)

2,544

1,035,739

Lumentum Holdings, Inc.(a)

3,508

3,208,978

Motorola Solutions, Inc.

7,484

3,631,985

Total

39,102,982

Electronic Equipment, Instruments & Components 0.9%

Amphenol Corp., Class A

55,465

8,793,976

CDW Corp.

5,760

873,101

Coherent Corp.(a)

8,820

2,450,461

Corning, Inc.

35,310

5,251,656

Flex Ltd.(a)

16,577

1,811,037

Jabil, Inc.

4,757

1,452,122

Keysight Technologies, Inc.(a)

7,732

2,495,116

TE Connectivity PLC

13,160

2,701,090

Teledyne Technologies, Inc.(a)

2,089

1,280,453

Zebra Technologies Corp., Class A(a)

2,148

759,425

Total

27,868,437

IT Services 0.7%

Accenture PLC, Class A

27,680

5,252,557

Akamai Technologies, Inc.(a)

6,555

712,004

Cognizant Technology Solutions Corp., Class A

21,364

1,379,687

Gartner, Inc.(a)

3,019

598,094

GoDaddy, Inc., Class A(a)

5,970

584,344

International Business Machines Corp.

42,375

9,910,241

VeriSign, Inc.

3,692

1,064,330

Total

19,501,257

Common Stocks (continued)

Issuer

Shares

Value ($)

Semiconductors & Semiconductor Equipment 17.1%

Advanced Micro Devices, Inc.(a)

73,516

34,605,452

Analog Devices, Inc.

22,011

7,971,064

Applied Materials, Inc.

35,780

16,401,194

Broadcom, Inc.

213,463

79,053,887

First Solar, Inc.(a)

4,845

978,206

Intel Corp.(a)

222,687

19,932,713

KLA Corp.

58,894

10,332,952

Lam Research Corp.

56,382

16,998,609

Marvell Technology, Inc.

39,474

8,355,067

Microchip Technology, Inc.

24,397

1,791,960

Micron Technology, Inc.

50,844

48,745,668

Monolithic Power Systems, Inc.

2,215

2,808,111

NVIDIA Corp.

1,091,985

241,088,448

NXP Semiconductors NV

11,383

2,557,077

ON Semiconductor Corp.(a)

17,669

1,309,096

Qnity Electronics, Inc.

9,438

1,127,180

QUALCOMM, Inc.

47,520

8,101,210

Skyworks Solutions, Inc.

6,781

454,395

Teradyne, Inc.

7,058

2,469,100

Texas Instruments, Inc.

41,032

10,705,659

Total

515,787,048

Software 9.2%

Adobe, Inc.(a)

18,223

5,335,512

Autodesk, Inc.(a)

9,519

2,460,947

Cadence Design Systems, Inc.(a)

12,435

4,212,729

CrowdStrike Holdings, Inc., Class A(a)

45,903

10,603,593

Datadog, Inc., Class A(a)

14,915

3,535,452

Fair Isaac Corp.(a)

1,046

1,199,982

Fortinet, Inc.(a)

28,077

4,799,202

Gen Digital, Inc.

24,849

770,319

Intuit, Inc.

12,468

4,479,753

Microsoft Corp.(c)

334,912

169,897,509

Oracle Corp.

76,503

11,408,127

Palantir Technologies, Inc., Class A(a)

103,519

19,293,871

Palo Alto Networks, Inc.(a)

36,564

13,972,201

PTC, Inc.(a)

5,208

811,094

Roper Technologies, Inc.

4,550

1,932,112

Salesforce, Inc.

36,882

9,498,590

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Index Fund  | 2026

9


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

ServiceNow, Inc.(a)

46,497

6,881,091

Synopsys, Inc.(a)

8,637

3,796,739

Trimble, Inc.(a)

10,510

629,969

Tyler Technologies, Inc.(a)

1,901

707,590

Workday, Inc., Class A(a)

9,184

1,813,381

Total

278,039,763

Technology Hardware, Storage & Peripherals 8.3%

Apple, Inc.

662,181

209,812,050

Dell Technologies, Inc.

13,042

5,947,282

Hewlett Packard Enterprise Co.

59,822

3,125,101

HP, Inc.

41,233

1,237,815

NetApp, Inc.

8,898

1,648,710

Sandisk Corp.(a)

6,677

10,460,856

Seagate Technology Holdings PLC

10,109

8,374,093

Super Micro Computer, Inc.(a)

25,373

945,906

Western Digital Corp.

15,540

7,001,547

Total

248,553,360

Total Information Technology

1,128,852,847

Materials 1.8%

Chemicals 0.9%

Air Products & Chemicals, Inc.

10,040

3,106,979

Albemarle Corp.

5,317

717,636

CF Industries Holdings, Inc.

6,926

900,588

Corteva, Inc.

30,154

2,551,933

Dow, Inc.

32,495

991,747

Ecolab, Inc.

11,420

3,234,144

International Flavors & Fragrances, Inc.

11,510

993,658

Linde PLC

20,845

10,205,295

LyondellBasell Industries NV, Class A

11,642

757,661

Mosaic Co. (The)

14,330

345,640

PPG Industries, Inc.

10,049

1,127,196

Sherwin-Williams Co. (The)

10,341

3,503,634

Total

28,436,111

Construction Materials 0.2%

CRH PLC

30,126

2,840,580

Martin Marietta Materials, Inc.

2,707

1,404,121

Vulcan Materials Co.

5,850

1,577,043

Total

5,821,744

Common Stocks (continued)

Issuer

Shares

Value ($)

Containers & Packaging 0.2%

Amcor Plc

20,845

956,577

Avery Dennison Corp.

3,449

600,505

Ball Corp.

12,004

755,892

International Paper Co.

23,873

905,503

Packaging Corp. of America

3,992

933,889

Smurfit WestRock PLC

23,646

1,108,997

Total

5,261,363

Metals & Mining 0.5%

Freeport-McMoRan, Inc.

64,813

4,908,937

Newmont Corp.

48,131

6,067,394

Nucor Corp.

10,268

2,563,304

Steel Dynamics, Inc.

6,112

1,421,773

Total

14,961,408

Total Materials

54,480,626

Real Estate 1.8%

Diversified REITs 0.0%

Federal Realty Investment Trust

3,544

411,210

Health Care REITs 0.4%

Alexandria Real Estate Equities, Inc.

7,071

362,672

Healthpeak Properties, Inc.

31,083

647,148

Ventas, Inc.

21,919

1,998,355

Welltower, Inc.

31,826

7,518,574

Total

10,526,749

Hotel & Resort REITs 0.0%

Host Hotels & Resorts, Inc.

28,716

629,742

Industrial REITs 0.2%

Prologis, Inc.

42,744

5,980,741

Office REITs 0.0%

BXP, Inc.

6,687

454,649

Real Estate Management & Development 0.1%

CBRE Group, Inc., Class A(a)

13,202

1,924,983

CoStar Group, Inc.(a)

18,411

590,441

Total

2,515,424

The accompanying Notes to Financial Statements are an integral part of this statement.

10

Columbia Large Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Residential REITs 0.2%

Camden Property Trust

4,532

479,486

Essex Property Trust, Inc.

2,897

819,735

Invitation Homes, Inc.

24,640

718,010

Mid-America Apartment Communities, Inc.

5,247

676,076

UDR, Inc.

13,330

492,543

Vivmark Residential

32,864

2,140,761

Total

5,326,611

Retail REITs 0.2%

Kimco Realty Corp.

30,405

720,903

Realty Income Corp.

42,042

2,576,334

Regency Centers Corp.

7,429

555,466

Simon Property Group, Inc.

14,620

3,104,118

Total

6,956,821

Specialized REITs 0.7%

American Tower Corp.

21,005

3,690,579

Crown Castle, Inc.

19,677

1,498,207

Digital Realty Trust, Inc.

15,680

2,910,051

Equinix, Inc.

4,446

4,653,717

Extra Space Storage, Inc.

9,525

1,343,978

Iron Mountain, Inc.

13,414

1,547,305

Public Storage

7,562

2,321,458

SBA Communications Corp.

4,782

906,954

VICI Properties, Inc.

49,271

1,263,801

Weyerhaeuser Co.

32,508

759,712

Total

20,895,762

Total Real Estate

53,697,709

Utilities 2.0%

Electric Utilities 1.3%

Alliant Energy Corp.

11,644

791,559

American Electric Power Co., Inc.

24,531

3,003,330

Constellation Energy Corp.

14,413

3,960,260

Duke Energy Corp.

35,149

4,214,717

Edison International

17,348

936,445

Entergy Corp.

20,644

2,194,664

Evergy, Inc.

10,393

842,041

Eversource Energy

16,956

1,189,294

Exelon Corp.

46,131

2,016,847

Common Stocks (continued)

Issuer

Shares

Value ($)

FirstEnergy Corp.

23,471

1,076,380

NextEra Energy, Inc.

94,018

7,741,442

NRG Energy, Inc.

9,512

1,047,461

PG&E Corp.

99,288

1,317,552

Pinnacle West Capital Corp.

5,464

533,505

PPL Corp.

33,920

1,157,690

Southern Co. (The)

50,825

4,472,600

Xcel Energy, Inc.

28,145

2,130,295

Total

38,626,082

Gas Utilities 0.1%

Atmos Energy Corp.

7,526

1,250,294

Independent Power and Renewable Electricity Producers 0.1%

AES Corp. (The)

32,153

473,935

Vistra Corp.

14,290

1,963,018

Total

2,436,953

Multi-Utilities 0.5%

Ameren Corp.

12,477

1,322,687

CenterPoint Energy, Inc.

29,493

1,167,923

CMS Energy Corp.

13,928

947,940

Consolidated Edison, Inc.

16,615

1,778,137

Dominion Energy, Inc.

39,650

2,617,296

DTE Energy Co.

9,379

1,272,074

NiSource, Inc.

21,616

884,527

Public Service Enterprise Group, Inc.

22,467

1,647,505

Sempra

29,472

2,407,862

WEC Energy Group, Inc.

14,685

1,559,106

Total

15,605,057

Water Utilities 0.0%

American Water Works Co., Inc.

8,804

1,216,977

Total Utilities

59,135,363

Total Common Stocks

(Cost $502,672,449)

2,980,810,355

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Index Fund  | 2026

11


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Warrants 0.0%

Issuer

Shares

Value ($)

Health Care 0.0%

Health Care Equipment & Supplies 0.0%

Hologic, Inc., CVR(a),(d)

12/31/2222

10,748

108

Total Health Care

108

Total Warrants

(Cost $108)

108

Money Market Funds 1.1%

Shares

Value ($)

Columbia Short-Term Cash Fund, 3.871%(b),(e)

32,028,431

32,012,417

Total Money Market Funds

(Cost $32,009,756)

32,012,417

Total Investments in Securities

(Cost: $534,682,313)

3,012,822,880

Other Assets & Liabilities, Net

929,437

Net Assets

3,013,752,317

At August 31, 2026, securities and/or cash totaling $9,236,229 were pledged as collateral.

Investments in derivatives 

Long futures contracts

Description

Number of

contracts

Expiration

date

Trading

currency

Notional

amount

Value/Unrealized

appreciation ($)

Value/Unrealized

depreciation ($)

S&P 500 Index E-mini

91

09/2026

USD

35,030,450

780,237

—

Notes to Portfolio of Investments 

(a)

Non-income producing investment.

(b)

Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The values of the holdings and transactions in these affiliated companies during the period ended August 31, 2026 are as follows:

Affiliated issuers

Beginning

of period($)

Purchases($)

Sales($)

Net change in

unrealized

appreciation

(depreciation)($)

End of

period($)

Realized gain

(loss)($)

Dividends($)

End of

period shares

Ameriprise Financial, Inc.

2,209,564

36,786

(50,225

)

45,630

2,241,755

293,574

14,232

4,053

Columbia Short-Term Cash Fund, 3.871%

40,655,905

224,842,535

(233,482,870

)

(3,153

)

32,012,417

829

694,702

32,028,431

Total

42,865,469

42,477

34,254,172

294,403

708,934

(c)

This security or a portion of this security has been pledged as collateral in connection with investments sold short and/or derivative contracts.

(d)

Valuation based on significant unobservable inputs.

(e)

The rate shown is the seven-day current annualized yield at August 31, 2026.

Abbreviation Legend 

CVR

Contingent Value Rights

Currency Legend 

USD

US Dollar

Fair value measurements  

The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to

The accompanying Notes to Financial Statements are an integral part of this statement.

12

Columbia Large Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Fair value measurements   (continued)

the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.

Fair value inputs are summarized in the three broad levels listed below:

■

 Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date.  Valuation adjustments are not applied to Level 1 investments.

■

 Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).

■

 Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).

Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by Columbia Management Investment Advisers, LLC (the Investment Manager), along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.

Investments falling into the Level 3 category, if any, are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.

The Fund’s Board of Trustees (the Board) has designated the Investment Manager, through its Valuation Committee (the Committee), as valuation designee, responsible for determining the fair value of the assets of the Fund for which market quotations are not readily available using valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.

The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third-party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third-party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. Representatives of the Investment Manager report to the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.

The following table is a summary of the inputs used to value the Fund’s investments at August 31, 2026: 

Level 1 ($)

Level 2 ($)

Level 3 ($)

Total ($)

Investments in Securities

Common Stocks

Communication Services

283,153,194

—

—

283,153,194

Consumer Discretionary

272,519,559

—

—

272,519,559

Consumer Staples

134,264,901

—

—

134,264,901

Energy

103,743,313

—

—

103,743,313

Financials

366,494,303

—

—

366,494,303

Health Care

276,693,103

—

—

276,693,103

Industrials

247,775,437

—

—

247,775,437

Information Technology

1,128,852,847

—

—

1,128,852,847

Materials

54,480,626

—

—

54,480,626

Real Estate

53,697,709

—

—

53,697,709

Utilities

59,135,363

—

—

59,135,363

Total Common Stocks

2,980,810,355

—

—

2,980,810,355

Warrants

Health Care

—

—

108

108

Total Warrants

—

—

108

108

Money Market Funds

32,012,417

—

—

32,012,417

Total Investments in Securities

3,012,822,772

—

108

3,012,822,880

Investments in Derivatives

Asset

Futures Contracts

780,237

—

—

780,237

Total

3,013,603,009

—

108

3,013,603,117

See the Portfolio of Investments for all investment classifications not indicated in the table.

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Index Fund  | 2026

13


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Fair value measurements   (continued)

Derivative instruments are valued at unrealized appreciation (depreciation).

The Fund does not hold any significant investments (greater than one percent of net assets) categorized as Level 3.

The accompanying Notes to Financial Statements are an integral part of this statement.

14

Columbia Large Cap Index Fund  | 2026


Statement of Assets and Liabilities

August 31, 2026 (Unaudited)

Assets

Investments in securities, at value

Unaffiliated issuers (cost $502,588,374)

$2,978,568,708

Affiliated issuers (cost $32,093,939)

34,254,172

Receivable for:

Capital shares sold

208,050

Dividends

2,579,748

Foreign tax reclaims

8,261

Variation margin for futures contracts

1,020

Expense reimbursement due from Investment Manager

293

Total assets

3,015,620,252

Liabilities

Payable for:

Capital shares redeemed

1,250,476

Variation margin for futures contracts

118,450

Management services fees

49,788

Distribution and/or service fees

9,858

Compensation of board members

4,521

Deferred compensation of board members

434,842

Total liabilities

1,867,935

Net assets applicable to outstanding capital stock

$3,013,752,317

Represented by

Paid in capital

253,992,702

Total distributable earnings (loss)

2,759,759,615

Total - representing net assets applicable to outstanding capital stock

$3,013,752,317

Class A

Net assets

$477,770,462

Shares outstanding

8,258,864

Net asset value per share

$57.85

Institutional Class

Net assets

$2,125,969,441

Shares outstanding

36,146,858

Net asset value per share

$58.81

Institutional 2 Class

Net assets

$183,591,267

Shares outstanding

3,007,190

Net asset value per share

$61.05

Institutional 3 Class

Net assets

$226,421,147

Shares outstanding

4,007,031

Net asset value per share

$56.51

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Index Fund  | 2026

15


Statement of Operations

Six Months Ended August 31, 2026 (Unaudited)

Net investment income

Income:

Dividends — unaffiliated issuers

$16,802,456

Dividends — affiliated issuers

708,934

Foreign taxes withheld

(3,632

)

Total income

17,507,758

Expenses:

Management services fees

3,013,071

Distribution and/or service fees

Class A

601,479

Interest on collateral

1,585

Interest on interfund lending

12,253

Compensation of board members

19,082

Deferred compensation of board members

47,810

Other

271

Total expenses

3,695,551

Fees waived or expenses reimbursed by Investment Manager and its affiliates

(67,163

)

Total net expenses

3,628,388

Net investment income

13,879,370

Realized and unrealized gain (loss) — net

Net realized gain (loss) on:

Investments — unaffiliated issuers

281,080,497

Investments — affiliated issuers

294,403

Foreign currency translations

54

Futures contracts

3,562,420

Net realized gain

284,937,374

Net change in unrealized appreciation (depreciation) on:

Investments — unaffiliated issuers

42,198,600

Investments — affiliated issuers

42,477

Futures contracts

736,486

Net change in unrealized appreciation (depreciation)

42,977,563

Net realized and unrealized gain

327,914,937

Net increase in net assets resulting from operations

$341,794,307

The accompanying Notes to Financial Statements are an integral part of this statement.

16

Columbia Large Cap Index Fund  | 2026


Statement of Changes in Net Assets

Six Months Ended

August 31, 2026

(Unaudited)

Year Ended

February 28, 2026

Operations

Net investment income

$13,879,370

$32,181,631

Net realized gain

284,937,374

535,488,553

Net change in unrealized appreciation (depreciation)

42,977,563

(76,148,836

)

Net increase in net assets resulting from operations

341,794,307

491,521,348

Distributions to shareholders

Net investment income and net realized gains

Class A

(17,851,475

)

(114,949,265

)

Institutional Class

(77,872,061

)

(525,834,818

)

Institutional 2 Class

(6,376,357

)

(41,854,004

)

Institutional 3 Class

(9,909,414

)

(65,314,708

)

Total distributions to shareholders

(112,009,307

)

(747,952,795

)

Increase (decrease) in net assets from capital stock activity

(233,541,893

)

97,262,246

Total decrease in net assets

(3,756,893

)

(159,169,201

)

Net assets at beginning of period

3,017,509,210

3,176,678,411

Net assets at end of period

$3,013,752,317

$3,017,509,210

Six Months Ended

Year Ended

August 31, 2026 (Unaudited)

February 28, 2026

Shares

Dollars ($)

Shares

Dollars ($)

Capital stock activity

Class A

Shares sold

862,872

48,008,074

1,444,761

80,809,158

Distributions reinvested

288,445

16,207,759

1,930,605

103,107,247

Shares redeemed

(1,506,226

)

(85,047,542

)

(2,735,643

)

(152,854,113

)

Net increase (decrease)

(354,909

)

(20,831,709

)

639,723

31,062,292

Institutional Class

Shares sold

1,997,967

109,201,664

6,332,116

359,610,124

Distributions reinvested

1,286,331

73,449,482

9,164,251

496,335,996

Shares redeemed

(6,831,544

)

(374,274,543

)

(13,692,428

)

(789,971,479

)

Net increase (decrease)

(3,547,246

)

(191,623,397

)

1,803,939

65,974,641

Institutional 2 Class

Shares sold

196,102

11,523,365

454,257

26,785,805

Distributions reinvested

106,570

6,316,381

740,272

41,479,770

Shares redeemed

(289,895

)

(17,133,338

)

(1,193,319

)

(70,334,133

)

Net increase (decrease)

12,777

706,408

1,210

(2,068,558

)

Institutional 3 Class

Shares sold

1,339,088

72,387,445

1,772,623

92,254,590

Distributions reinvested

76,662

4,205,670

498,491

26,032,987

Shares redeemed

(1,786,485

)

(98,386,310

)

(2,070,716

)

(115,993,706

)

Net increase (decrease)

(370,735

)

(21,793,195

)

200,398

2,293,871

Total net increase (decrease)

(4,260,113

)

(233,541,893

)

2,645,270

97,262,246

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Index Fund  | 2026

17


Financial Highlights

The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The ratios of expenses and net investment income are annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher. A zero balance may reflect an amount rounding to less than $0.01 or 0.01%. 

Net asset value,

beginning of

period

Net

investment

income

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class A

Six Months Ended 8/31/2026 (Unaudited)

$53.56

0.20

6.24

6.44

(0.06

)

(2.09

)

(2.15

)

Year Ended 2/28/2026

$59.35

0.47

8.26

8.73

(0.54

)

(13.98

)

(14.52

)

Year Ended 2/28/2025

$54.61

0.54

9.21

9.75

(0.61

)

(4.40

)

(5.01

)

Year Ended 2/29/2024

$45.89

0.60

12.54

13.14

(0.61

)

(3.81

)

(4.42

)

Year Ended 2/28/2023

$56.34

0.60

(5.27

)

(4.67

)

(0.63

)

(5.15

)

(5.78

)

Year Ended 2/28/2022

$57.11

0.58

8.97

9.55

(0.62

)

(9.70

)

(10.32

)

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$54.37

0.28

6.33

6.61

(0.08

)

(2.09

)

(2.17

)

Year Ended 2/28/2026

$60.04

0.62

8.38

9.00

(0.69

)

(13.98

)

(14.67

)

Year Ended 2/28/2025

$55.18

0.69

9.33

10.02

(0.76

)

(4.40

)

(5.16

)

Year Ended 2/29/2024

$46.32

0.73

12.68

13.41

(0.74

)

(3.81

)

(4.55

)

Year Ended 2/28/2023

$56.82

0.73

(5.32

)

(4.59

)

(0.76

)

(5.15

)

(5.91

)

Year Ended 2/28/2022

$57.52

0.74

9.04

9.78

(0.78

)

(9.70

)

(10.48

)

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$56.37

0.29

6.56

6.85

(0.08

)

(2.09

)

(2.17

)

Year Ended 2/28/2026

$61.75

0.64

8.65

9.29

(0.69

)

(13.98

)

(14.67

)

Year Ended 2/28/2025

$56.63

0.71

9.57

10.28

(0.76

)

(4.40

)

(5.16

)

Year Ended 2/29/2024

$47.43

0.75

13.00

13.75

(0.74

)

(3.81

)

(4.55

)

Year Ended 2/28/2023

$58.02

0.74

(5.42

)

(4.68

)

(0.76

)

(5.15

)

(5.91

)

Year Ended 2/28/2022

$58.55

0.75

9.20

9.95

(0.78

)

(9.70

)

(10.48

)

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$52.32

0.26

6.10

6.36

(0.08

)

(2.09

)

(2.17

)

Year Ended 2/28/2026

$58.29

0.60

8.10

8.70

(0.69

)

(13.98

)

(14.67

)

Year Ended 2/28/2025

$53.70

0.69

9.06

9.75

(0.76

)

(4.40

)

(5.16

)

Year Ended 2/29/2024

$45.18

0.72

12.35

13.07

(0.74

)

(3.81

)

(4.55

)

Year Ended 2/28/2023

$55.59

0.70

(5.20

)

(4.50

)

(0.76

)

(5.15

)

(5.91

)

Year Ended 2/28/2022

$56.45

0.68

8.94

9.62

(0.78

)

(9.70

)

(10.48

)

Notes to Financial Highlights

(a)

In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.

(b)

Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.

(c)

Ratios include interest on collateral expense which is less than 0.01%.

(d)

Ratios include interfund lending expense which is less than 0.01%.

(e)

The benefits derived from expense reductions had an impact of less than 0.01%.

The accompanying Notes to Financial Statements are an integral part of this statement.

18

Columbia Large Cap Index Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class A

Six Months Ended 8/31/2026 (Unaudited)

$57.85

12.15%

0.46%

(c),(d)

0.45%

(c),(d)

0.71%

3%

$477,770

Year Ended 2/28/2026

$53.56

16.43%

0.45%

(c)

0.45%

(c),(e)

0.83%

5%

$461,364

Year Ended 2/28/2025

$59.35

17.84%

0.45%

(c)

0.45%

(c),(e)

0.92%

6%

$473,296

Year Ended 2/29/2024

$54.61

29.86%

0.45%

(c)

0.45%

(c),(e)

1.21%

7%

$491,954

Year Ended 2/28/2023

$45.89

(8.02%

)

0.45%

(c),(d)

0.45%

(c),(d),(e)

1.21%

9%

$434,670

Year Ended 2/28/2022

$56.34

15.86%

0.45%

(c)

0.45%

(c),(e)

0.92%

2%

$529,310

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$58.81

12.29%

0.21%

(c),(d)

0.20%

(c),(d)

0.96%

3%

$2,125,969

Year Ended 2/28/2026

$54.37

16.72%

0.20%

(c)

0.20%

(c),(e)

1.08%

5%

$2,158,332

Year Ended 2/28/2025

$60.04

18.14%

0.20%

(c)

0.20%

(c),(e)

1.17%

6%

$2,275,057

Year Ended 2/29/2024

$55.18

30.19%

0.20%

(c)

0.20%

(c),(e)

1.46%

7%

$2,387,952

Year Ended 2/28/2023

$46.32

(7.80%

)

0.20%

(c),(d)

0.20%

(c),(d),(e)

1.46%

9%

$1,961,320

Year Ended 2/28/2022

$56.82

16.15%

0.20%

(c)

0.20%

(c),(e)

1.17%

2%

$2,497,279

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$61.05

12.28%

0.21%

(c),(d)

0.20%

(c),(d)

0.96%

3%

$183,591

Year Ended 2/28/2026

$56.37

16.73%

0.20%

(c)

0.20%

(c)

1.09%

5%

$168,782

Year Ended 2/28/2025

$61.75

18.13%

0.20%

(c)

0.20%

(c)

1.17%

6%

$184,836

Year Ended 2/29/2024

$56.63

30.20%

0.20%

(c)

0.20%

(c)

1.46%

7%

$244,016

Year Ended 2/28/2023

$47.43

(7.79%

)

0.20%

(c),(d)

0.20%

(c),(d)

1.43%

9%

$194,895

Year Ended 2/28/2022

$58.02

16.15%

0.20%

(c)

0.20%

(c)

1.17%

2%

$379,872

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$56.51

12.29%

0.21%

(c),(d)

0.20%

(c),(d)

0.95%

3%

$226,421

Year Ended 2/28/2026

$52.32

16.71%

0.20%

(c)

0.20%

(c)

1.09%

5%

$229,031

Year Ended 2/28/2025

$58.29

18.14%

0.20%

(c)

0.20%

(c)

1.19%

6%

$243,489

Year Ended 2/29/2024

$53.70

30.20%

0.20%

(c)

0.20%

(c)

1.47%

7%

$231,191

Year Ended 2/28/2023

$45.18

(7.81%

)

0.20%

(c),(d)

0.20%

(c),(d)

1.49%

9%

$224,666

Year Ended 2/28/2022

$55.59

16.17%

0.20%

(c)

0.20%

(c)

1.10%

2%

$72,594

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Index Fund  | 2026

19


Notes to Financial Statements

August 31, 2026 (Unaudited)

Note 1. Organization

Columbia Large Cap Index Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

Fund shares

The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different net investment income distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.

As described in the Fund’s prospectus, Class A shares are offered to the general public for investment. Institutional Class, Institutional 2 Class and Institutional 3 Class shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.

Note 2. Summary of significant accounting policies

Basis of preparation

The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification (Topic 946), Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which require management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

Segment reporting

The intent of FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures is to enable investors to better understand an entity’s overall performance and to assess its potential future cash flows through improved segment disclosures. The chief operating decision maker (CODM) for the Fund is Columbia Management Investment Advisers, LLC through its Investment Oversight Committee and Global Executive Group, which are responsible for assessing performance and making decisions about resource allocation. The CODM has determined that the Fund has a single operating segment because the CODM monitors the operating results of the Fund as a whole and the Fund’s long-term strategic asset allocation is pre-determined in accordance with the terms of its prospectus, based on a defined investment strategy which is executed by the Fund’s portfolio managers as a team. The financial information provided to and reviewed by the CODM is consistent with that presented within the Fund’s financial statements.

Security valuation

Equity securities listed on an exchange are valued at the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. Securities with a closing price not readily available or not listed on any exchange are valued at the mean between the closing bid and ask prices. Listed preferred stocks convertible into common stocks are valued using an evaluated price from a pricing service.

20

Columbia Large Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Foreign equity securities are valued based on the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy approved by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including relevant general and sector indices, currency fluctuations, depositary receipts, and futures, as applicable, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.

Investments in open-end investment companies (other than exchange-traded funds (ETFs)) are valued at the latest net asset value reported by those companies as of the valuation time. 

Futures and options on futures contracts are valued based upon the settlement price at the close of regular trading on their principal exchanges or, in the absence of a settlement price, at the mean of the latest quoted bid and ask prices.

Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.

The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.

GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.

Foreign currency transactions and translations

The values of all assets and liabilities denominated in foreign currencies are generally translated into U.S. dollars at exchange rates determined at the close of regular trading on the New York Stock Exchange. Net realized and unrealized gains (losses) on foreign currency transactions and translations include gains (losses) arising from the fluctuation in exchange rates between trade and settlement dates on securities transactions, gains (losses) arising from the disposition of foreign currency and currency gains (losses) between the accrual and payment dates on dividends, interest income and foreign withholding taxes.

For financial statement purposes, the Fund does not distinguish that portion of gains (losses) on investments which is due to changes in foreign exchange rates from that which is due to changes in market prices of the investments. Such fluctuations are included with the net realized and unrealized gains (losses) on investments in the Statement of Operations.

Derivative instruments

The Fund invests in certain derivative instruments, as detailed below, in seeking to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains

Columbia Large Cap Index Fund  | 2026

21


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional exposure of a financial instrument is the nominal or face amount that is used to calculate payments made on that instrument and/or changes in value for the instrument. The notional exposure is a hypothetical underlying quantity upon which payment obligations are computed. Notional exposures provide a gauge for how the Fund may behave given changes in the underlying rate, asset or reference instrument and individual markets. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.

A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally expected to be limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty provides some protection in the case of clearing member default. The clearinghouse stands between the buyer and the seller of the contract; therefore, the primary counterparty credit risk is the risk of failure of the clearinghouse. However, credit risk still exists in exchange-traded and centrally cleared derivatives with respect to any collateral that is held in a broker’s customer accounts. While clearing brokers are required to segregate customer margin from their own assets, in the event that a clearing broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the clearing broker for all its clients and such shortfall is not remedied by the central counterparty or otherwise, U.S. bankruptcy laws will typically allocate that shortfall on a pro rata basis across all the clearing broker’s customers (including the Fund) by account class, potentially resulting in losses to the Fund.

In connection with certain over-the-counter derivatives, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and forward foreign currency exchange contracts and contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instruments’ payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.

Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or central counterparty for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms for most over-the-counter derivatives are subject to regulatory requirements to exchange variation margin with trading counterparties and may have contract specific margin terms as well. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker or receive interest income on cash collateral pledged to the broker. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.

Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty.  The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement.  In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.

22

Columbia Large Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.

Futures contracts

Futures contracts are exchange-traded and represent commitments for the future purchase or sale of an asset at a specified price on a specified date. The Fund bought and sold futures contracts to manage its exposure to the securities markets or to movements in interest rates and currency values. A Fund invests in futures contracts as part of its primary investment strategy and/or to equitize its cash flows. Investments in futures contracts may increase or decrease exposure to a particular market. These instruments may be used for other purposes in future periods. Upon entering into futures contracts, the Fund bears risks that it may not achieve the anticipated benefits of the futures contracts and may realize a loss. Additional risks include counterparty credit risk, the possibility of an illiquid market, and that a change in the value of the contract or option may not correlate with changes in the value of the underlying asset.

Upon entering into a futures contract, the Fund deposits cash or securities with the broker, known as a futures commission merchant (FCM), in an amount sufficient to meet the initial margin requirement. The initial margin deposit must be maintained at an established level over the life of the contract. Cash deposited as initial margin is recorded in the Statement of Assets and Liabilities as margin deposits. Securities deposited as initial margin are designated in the Portfolio of Investments. Subsequent payments (variation margin) are made or received by the Fund each day. The variation margin payments are equal to the daily change in the contract value and are recorded as variation margin receivable or payable and are offset in unrealized gains or losses. The Fund generally expects to earn interest income on its margin deposits. The Fund recognizes a realized gain or loss when the contract is closed or expires. Futures contracts involve, to varying degrees, risk of loss in excess of the variation margin disclosed in the Statement of Assets and Liabilities.

Effects of derivative transactions in the financial statements

The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.

The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at August 31, 2026: 

Asset derivatives

Risk exposure

category

Statement

of assets and liabilities

location

Fair value ($)

Equity risk

Component of total distributable earnings (loss) — unrealized appreciation on futures contracts

780,237

*

*

Includes cumulative appreciation (depreciation) as reported in the tables following the Portfolio of Investments. Only the current day’s variation margin for futures and centrally cleared swaps, if any, is reported in receivables or payables in the Statement of Assets and Liabilities.

The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the six months ended August 31, 2026: 

Amount of realized gain (loss) on derivatives recognized in income

Risk exposure category

Futures

contracts

($)

Equity risk

3,562,420

Change in unrealized appreciation (depreciation) on derivatives recognized in income

Risk exposure category

Futures

contracts

($)

Equity risk

736,486

Columbia Large Cap Index Fund  | 2026

23


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

The following table is a summary of the average daily outstanding volume by derivative instrument for the six months ended August 31, 2026: 

Derivative instrument

Average notional

amounts ($)

Futures contracts — long

40,574,699

Security transactions

Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.

Income recognition

Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of an ex-dividend notification in the case of certain foreign securities.

The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.

Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.

Expenses

General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.

Determination of class net asset value

All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.

Federal income tax status

The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.

Foreign taxes

The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

24

Columbia Large Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability in the Statement of Assets and Liabilities.

Distributions to shareholders

Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.

Guarantees and indemnifications

Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.

Note 3. Fees and other transactions with affiliates

Management services fees

The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice and is responsible for administrative and accounting services. The management services fee is an annual fee that is equal to 0.20% of the Fund’s daily net assets.

The Investment Manager, from the management services fee it receives from the Fund, pays all operating expenses of the Fund, with the exception of brokerage fees and commissions, taxes, interest, fees and expenses of Board of Trustees who are not officers, directors or employees of the Investment Manager or its affiliates, distribution and/or shareholder servicing and any extraordinary non-recurring expenses that may arise, including litigation fees.

Compensation of Board members

Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund. The expense for the Deferred Plan, which includes Trustees’ fees deferred during the current period as well as any gains or losses on the Trustees’ deferred compensation balances as a result of market fluctuations, is included in "Deferred compensation of board members" in the Statement of Operations.

Compensation of Chief Compliance Officer

The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. A portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets. The expenses of the Chief Compliance Officer allocated to the Fund are payable by the Investment Manager.

Columbia Large Cap Index Fund  | 2026

25


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Transfer agency fees

Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with SS&C GIDS, Inc. (SS&C GIDS) to serve as sub-transfer agent.

The transfer agency fees are payable by the Investment Manager. The Transfer Agent pays the fees of SS&C GIDS for services as sub-transfer agent and SS&C GIDS is not entitled to reimbursement for such fees from the Fund. The Transfer Agent also receives compensation from the Investment Manager for various shareholder services and reimbursements for certain out-of-pocket expenses.

An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the six months ended August 31, 2026, no minimum account balance fees were charged by the Fund.

Distribution and service fees

The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, a distribution and shareholder service plan (the Plan) applicable to Class A shares, which sets the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.

Under the Plan, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund.

Expenses waived/reimbursed by the Investment Manager and its affiliates

The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the classes’ average daily net assets: 

Fee rate(s) contractual

through

June 30, 2027 (%)

Class A

0.45

Institutional Class

0.20

Institutional 2 Class

0.20

Institutional 3 Class

0.20

Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, costs associated with shareholder meetings, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.

26

Columbia Large Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Note 4. Federal tax information

The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.

At August 31, 2026, the approximate cost of all investments for federal income tax purposes and the aggregate gross approximate unrealized appreciation and depreciation based on that cost was: 

Federal

tax cost ($)

Gross unrealized

appreciation ($)

Gross unrealized

(depreciation) ($)

Net unrealized

appreciation ($)

534,682,000

2,508,470,000

(29,549,000

)

2,478,921,000

Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.

Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.

Note 5. Portfolio information

The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $99,191,387 and $415,816,728, respectively, for the six months ended August 31, 2026. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.

Note 6. Affiliated money market fund

The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. The Securities and Exchange Commission has adopted amendments to money market fund rules requiring institutional prime money market funds like the Affiliated MMF to be subject to a discretionary liquidity fee of up to 2% if the imposition of such a fee is determined to be in the best interest of the Affiliated MMF and to a mandatory liquidity fee if daily net redemptions exceed 5% of net assets.

Note 7. Interfund lending

Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.

Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.

The Fund’s activity in the Interfund Program during the six months ended August 31, 2026 was as follows: 

Borrower or lender

Average loan

balance ($)

Weighted average

interest rate (%)

Number of days

with outstanding loans

Borrower

105,400,000

4.19

1

Columbia Large Cap Index Fund  | 2026

27


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Interest expense incurred by the Fund is recorded as Interest on interfund lending in the Statement of Operations. The Fund had no outstanding interfund loans at August 31, 2026.

Note 8. Line of credit

Effective October 22, 2026, the Fund has access to a revolving credit facility with a syndicate of banks led by State Street Bank and Trust Company, Citibank, N.A. and Wells Fargo Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is an agreement between the Fund and certain other funds managed by the Investment Manager, severally and not jointly, permits aggregate borrowings up to $750 million. Interest is currently charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate and (ii) the overnight bank funding rate, plus 1.00% in each case. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in October unless extended or renewed. Prior to October 22, 2026, the Fund had access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A., which permitted aggregate borrowings up to $750 million. Interest was charged to each participating fund based on its borrowings at a rate equal to the highest of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case.

The Fund had no borrowings during the six months ended August 31, 2026.

Note 9. Risks and uncertainties

An investment in the Fund involves risks, including market risk and concentration risk, among others. The value of the Fund’s holdings and the Fund’s net asset value may go down. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally.

Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, other conflicts, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.

To the extent that the Fund concentrates its investment in particular issuers, countries, geographic regions, industries or sectors, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of issuers, countries, geographic regions, industries, sectors or investments.

Additional risk factors of the Fund are described more fully in the Fund’s Prospectus and Statement of Additional Information.

Shareholder concentration risk

At August 31, 2026, affiliated shareholders of record owned 41.8% of the outstanding shares of the Fund in one or more accounts. Fund shares sold to or redeemed by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.

28

Columbia Large Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Note 10. Subsequent events

Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.

Note 11. Information regarding pending and settled legal proceedings

Ameriprise Financial and certain of its affiliates are involved, in the normal course of business, in legal proceedings that include regulatory inquiries, arbitration and litigation (including class actions) concerning matters arising in connection with the conduct of their activities as part of a diversified financial services firm. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.

There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, it is inherently difficult to determine whether any loss is probable or even reasonably possible, or to reasonably estimate the amount of any loss that may result from such matters. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief, and may lead to further claims, examinations, adverse publicity or reputational damage, each of which could have a material adverse effect on the consolidated financial condition or results of operations or financial condition of Ameriprise Financial or one or more of its affiliates that provide services to the Fund.

Columbia Large Cap Index Fund  | 2026

29


 Approval of Management Agreement

(Unaudited)

Columbia Management Investment Advisers, LLC (the Investment Manager, and together with its domestic and global affiliates, Columbia Threadneedle Investments), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial), serves as the investment manager to Columbia Large Cap Index Fund (the Fund). Under a management agreement (the Management Agreement), the Investment Manager provides investment advice and other services to the Fund.  The Investment Manager also provides investment advice and other services to other funds in the Columbia Fund family (collectively, the Funds).

On an annual basis, the Fund’s Board of Trustees (the Board), including the independent Board members (the Independent Trustees), considers renewal of the Management Agreement.  The Investment Manager prepared detailed reports for the Board and its Contracts Committee (including its Contracts Subcommittee) in March, April and June 2026, including reports providing the results of analyses performed by a third-party data provider, Broadridge Financial Solutions, Inc. (Broadridge), and comprehensive responses by the Investment Manager to written requests for information by independent legal counsel to the Independent Trustees (Independent Legal Counsel), to assist the Board in making this determination.  In addition, throughout the year, the Board (or its committees or subcommittees) regularly meets with portfolio management teams and senior management personnel and reviews information prepared by the Investment Manager addressing the services the Investment Manager provides and Fund performance.  The Board also accords appropriate weight to the work, deliberations and conclusions of the various committees (including their subcommittees), such as the Contracts Committee, the Investment Review Committee, the Audit Committee and the Compliance Committee, in determining whether to continue the Management Agreement.

The Board, at its June 18, 2026 Board meeting (the June Meeting), considered the renewal of the Management Agreement for an additional one-year term.  At the June Meeting, Independent Legal Counsel reviewed with the Independent Trustees various factors relevant to the Board’s consideration of advisory agreements and the Board’s legal responsibilities related to such consideration. The Independent Trustees considered such information as they, their legal counsel or the Investment Manager believed reasonably necessary to evaluate and to approve the continuation of the Management Agreement. Among other things, the information and factors considered included the following:

•

Information on the investment performance of the Fund relative to the performance of a group of mutual funds determined to be comparable to the Fund by Broadridge, as well as performance relative to one or more benchmarks;

•

Information on the Fund’s management fees and total expenses, including information comparing the Fund’s expenses to those of a group of comparable mutual funds, as determined by Broadridge;

•

The Investment Manager’s agreement to contractually limit or cap total operating expenses for the Fund so that total operating expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses and infrequent and/or unusual expenses) would not exceed a specified annual rate, as a percentage of the Fund’s net assets;

•

Terms of the Management Agreement;

•

Descriptions of other agreements and arrangements with affiliates of the Investment Manager relating to the operations of the Fund, including agreements with respect to the provision of transfer agency and shareholder services to the Fund;

•

Descriptions of various services performed by the Investment Manager under the Management Agreement, including portfolio management and portfolio trading practices;

•

Information regarding any recently negotiated management fees of similarly-managed portfolios of other institutional clients of the Investment Manager;

•

Information regarding the resources of the Investment Manager, including information regarding senior management, portfolio managers and other personnel;

•

Information regarding the capabilities of the Investment Manager with respect to compliance monitoring services;

•

The profitability to the Investment Manager and its affiliates from their relationships with the Fund; and

30

Columbia Large Cap Index Fund  | 2026


Approval of Management Agreement (continued)

(Unaudited)

•

Report provided by the Board’s independent fee consultant, JDL Consultants, LLC (JDL).

Following an analysis and discussion of the foregoing, and the factors identified below, the Board, including all of the Independent Trustees, approved the renewal of the Management Agreement.

Nature, extent and quality of services provided by the Investment Manager

The Board analyzed various reports and presentations it had received detailing the services performed by the Investment Manager, as well as its history, expertise, resources and relative capabilities, and the qualifications of its personnel.

The Board specifically considered the many developments during recent years concerning the services provided by the Investment Manager. Among other things, the Board noted the organization and depth of the equity and credit research departments. The Board further observed the enhancements to the investment risk management department’s processes, systems and oversight over the past several years.  The Board also took into account the broad scope of services provided by the Investment Manager to the Fund, including, among other services, investment, risk and compliance oversight.  The Board also took into account the information it received concerning the Investment Manager’s ability to attract and retain key portfolio management personnel and that it has sufficient resources to provide competitive and adequate compensation to investment personnel.

In connection with the Board’s evaluation of the overall package of services provided by the Investment Manager, the Board also considered the nature, quality and range of administrative services provided to the Fund by the Investment Manager, as well as the achievements in 2025 in the performance of administrative services, and noted the various enhancements anticipated for 2026.  In evaluating the quality of services provided under the Management Agreement, the Board also took into account the organization and strength of the Fund’s and its service providers’ compliance programs.  The Board also reviewed the financial condition of the Investment Manager and its affiliates and each entity’s ability to carry out its responsibilities under the Management Agreement and the Fund’s other service agreements.

In addition, the Board discussed the acceptability of the terms of the Management Agreement, noting that no changes were proposed from the form of agreement previously approved.  The Board also noted the wide array of legal and compliance services provided to the Fund under the Management Agreement.

After reviewing these and related factors (including investment performance as discussed below), the Board concluded, within the context of its overall conclusions, that the nature, extent and quality of the services provided to the Fund under the Management Agreement supported the continuation of the Management Agreement.

Investment performance

The Board carefully reviewed the investment performance of the Fund, including detailed reports providing the results of analyses performed by each of the Investment Manager, Broadridge and JDL collectively showing, for various periods (including since manager inception): (i) the performance of the Fund, (ii) the Fund’s performance relative to peers and benchmarks, (iii) the net assets of the Fund, and (iv) index tracking error data of the Fund. The Board observed that the Fund’s tracking error versus its performance was within the range of management’s expectations.

The Board also reviewed a description of the third-party data provider’s methodology for identifying the Fund’s peer groups for purposes of performance and expense comparisons. 

The Board also considered the Investment Manager’s performance and reputation generally.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the performance of the Fund and the Investment Manager, in light of other considerations, supported the continuation of the Management Agreement.

Columbia Large Cap Index Fund  | 2026

31


Approval of Management Agreement (continued)

(Unaudited)

Comparative fees, costs of services provided and the profits realized by the Investment Manager and its affiliates from their relationships with the Fund

The Board reviewed comparative fees and the costs of services provided under the Management Agreement.  The Board members considered detailed comparative information set forth in an annual report on fees and expenses, including, among other things, data (based on analyses conducted by Broadridge and JDL) showing a comparison of the Fund’s expenses with median expenses paid by funds in its comparative peer universe, as well as data showing the Fund’s contribution to the Investment Manager’s profitability.

The Board considered the reports of JDL, which assisted in the Board’s analysis of the Funds’ performance and expenses and the reasonableness of the Funds’ fee rates.  The Board accorded particular weight to the notion that a primary objective of the level of fees is to achieve a rational pricing model applied consistently across the various product lines in the Fund family, while assuring that the overall fees for each Fund (with certain exceptions) are generally in line with the current “pricing philosophy” such that Fund total expense ratios, in general, approximate or are lower than the median expense ratios of funds in the same Lipper comparison universe. The Board took into account that the Fund’s total expense ratio (after considering proposed expense caps/waivers) was below the peer universe’s median expense ratio shown in the reports.

After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the levels of management fees and expenses of the Fund, in light of other considerations, supported the continuation of the Management Agreement.

The Board also considered the profitability of the Investment Manager and its affiliates in connection with the Investment Manager providing management services to the Fund.  With respect to the profitability of the Investment Manager and its affiliates, the Independent Trustees referred to information discussing the profitability to the Investment Manager and Ameriprise Financial from managing, operating and distributing the Funds.  The Board considered that the profitability generated by the Investment Manager in 2025 had increased slightly from 2024 levels due to a variety of factors, including the increased assets under management of the Funds.  It also took into account the indirect economic benefits flowing to the Investment Manager or its affiliates in connection with managing or distributing the Funds, such as the enhanced ability to offer various other financial products to Ameriprise Financial customers, soft dollar benefits and overall reputational advantages.  The Board noted that the fees paid by the Fund should permit the Investment Manager to offer competitive compensation to its personnel, make necessary investments in its business and earn an appropriate profit.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the costs of services provided and the profitability to the Investment Manager and its affiliates from their relationships with the Fund supported the continuation of the Management Agreement.

Economies of scale

The Board considered the economies of scale that might be realized as the Fund’s net asset level grows and took note of the extent to which Fund shareholders might also benefit from such growth. The Board took into account, however, that the Management Agreement already provides for a relatively low flat fee regardless of the Fund’s asset level, and requires Columbia Threadneedle to provide investment advice, as well as administrative, accounting and other services to the Fund.

Conclusion

The Board reviewed all of the above considerations in reaching its decision to approve the continuation of the Management Agreement.  In reaching its conclusions, no single factor was determinative. 

On June 18, 2026, the Board, including all of the Independent Trustees, determined that fees payable under the Management Agreement were fair and reasonable in light of the extent and quality of services provided and approved the renewal of the Management Agreement.

32

Columbia Large Cap Index Fund  | 2026


[THIS PAGE INTENTIONALLY LEFT BLANK]


[THIS PAGE INTENTIONALLY LEFT BLANK]


[THIS PAGE INTENTIONALLY LEFT BLANK]


Columbia Large Cap Index Fund

P.O. Box 219104

Kansas City, MO 64121-9104

  

Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.

Columbia Threadneedle Investments® (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.

© 2026 Columbia Management Investment Advisers, LLC.

columbiathreadneedleus.com/investor/

SAR175_(10/26)



  

Columbia Large Cap Growth Opportunity Fund

Semi-Annual Financial Statements and Additional Information

August 31, 2026 (Unaudited)

Not FDIC or NCUA Insured

No Financial Institution Guarantee

May Lose Value


Table of Contents

Portfolio of Investments

3

Statement of Assets and Liabilities

7

Statement of Operations

8

Statement of Changes in Net Assets

9

Financial Highlights

12

Notes to Financial Statements

16

Approval of Management Agreement

24

Columbia Large Cap Growth Opportunity Fund | 2026


Portfolio of Investments

August 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

Investments in securities

Common Stocks 99.8%

Issuer

Shares

Value ($)

Communication Services 10.9%

Diversified Telecommunication Services 0.3%

Space Exploration Technologies Corp., Class A(a)

24,985

3,590,095

Entertainment 0.9%

TKO Group Holdings, Inc.

64,999

11,869,467

Interactive Media & Services 9.7%

Alphabet, Inc., Class A

232,482

78,892,767

Meta Platforms, Inc., Class A

84,038

48,098,309

Total

126,991,076

Total Communication Services

142,450,638

Consumer Discretionary 8.0%

Automobiles 0.9%

Tesla, Inc.(a)

33,811

12,440,757

Broadline Retail 2.5%

Amazon.com, Inc.(a)

123,693

32,131,731

Hotels, Restaurants & Leisure 3.7%

Expedia Group, Inc.

48,441

15,361,610

Hilton Worldwide Holdings, Inc.

65,907

20,845,066

Jersey Mike’s Subs, Inc., Class A(a)

144,458

3,098,624

Royal Caribbean Cruises Ltd.

33,905

9,111,630

Total

48,416,930

Specialty Retail 0.9%

TJX Companies, Inc. (The)

86,030

11,520,277

Total Consumer Discretionary

104,509,695

Consumer Staples 1.9%

Consumer Staples Distribution & Retail 1.9%

Costco Wholesale Corp.

26,492

25,005,534

Total Consumer Staples

25,005,534

Financials 5.7%

Banks 1.7%

Bank of America Corp.

210,894

13,062,774

Citigroup, Inc.

74,170

9,762,256

Total

22,825,030

Capital Markets 0.7%

Goldman Sachs Group, Inc. (The)

8,469

8,688,347

Common Stocks (continued)

Issuer

Shares

Value ($)

Financial Services 3.3%

Visa, Inc., Class A

115,141

43,681,041

Total Financials

75,194,418

Health Care 9.3%

Biotechnology 3.5%

Argenx SE, ADR(a)

7,116

7,341,293

Insmed, Inc.(a)

116,743

14,221,632

Madrigal Pharmaceuticals, Inc.(a)

14,146

7,639,264

Revolution Medicines, Inc.(a)

44,113

9,068,309

Vertex Pharmaceuticals, Inc.(a)

14,759

8,036,571

Total

46,307,069

Health Care Equipment & Supplies 0.8%

Intuitive Surgical, Inc.(a)

25,746

9,702,638

Health Care Providers & Services 0.5%

Guardant Health, Inc.(a)

43,288

6,883,658

Life Sciences Tools & Services 0.8%

Illumina, Inc.(a)

50,850

10,863,085

Pharmaceuticals 3.7%

Eli Lilly & Co.

41,914

48,483,181

Total Health Care

122,239,631

Industrials 10.2%

Aerospace & Defense 2.7%

Arxis, Inc.(a)

201,742

10,444,184

General Dynamics Corp.

40,426

15,012,195

Karman Holdings, Inc.(a)

230,991

9,574,577

Total

35,030,956

Commercial Services & Supplies 0.8%

Cintas Corp.

50,727

10,236,201

Construction & Engineering 0.6%

MasTec, Inc.(a)

35,104

8,417,237

Electrical Equipment 3.7%

Bloom Energy Corp., Class A(a)

59,506

12,276,088

Eaton Corp. PLC

28,792

11,570,929

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Growth Opportunity Fund  | 2026

3


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Generac Holdings, Inc.(a)

45,519

8,438,312

Vertiv Holdings Co.

60,868

15,747,769

Total

48,033,098

Ground Transportation 1.0%

CSX Corp.

263,434

13,306,051

Machinery 0.7%

Symbotic, Inc.(a)

247,178

9,805,551

Trading Companies & Distributors 0.7%

United Rentals, Inc.

8,351

8,668,338

Total Industrials

133,497,432

Information Technology 52.4%

Communications Equipment 1.9%

Arista Networks, Inc.(a)

129,176

25,278,451

Electronic Equipment, Instruments & Components 1.5%

Amphenol Corp., Class A

127,171

20,162,962

IT Services 1.8%

Snowflake, Inc., Class A(a)

69,527

23,043,334

Semiconductors & Semiconductor Equipment 25.8%

Advanced Micro Devices, Inc.(a)

71,075

33,456,424

Broadcom, Inc.

183,865

68,092,564

Micron Technology, Inc.

41,720

39,998,216

NVIDIA Corp.

895,142

197,629,451

Total

339,176,655

Software 13.5%

CrowdStrike Holdings, Inc., Class A(a)

150,773

34,828,563

Microsoft Corp.

145,554

73,838,089

Palantir Technologies, Inc., Class A(a)

37,756

7,036,963

Palo Alto Networks, Inc.(a)

92,558

35,369,189

ServiceNow, Inc.(a)

171,660

25,403,963

Total

176,476,767

Common Stocks (continued)

Issuer

Shares

Value ($)

Technology Hardware, Storage & Peripherals 7.9%

Apple, Inc.

245,999

77,944,783

Sandisk Corp.(a)

5,107

8,001,137

Western Digital Corp.

39,286

17,700,307

Total

103,646,227

Total Information Technology

687,784,396

Real Estate 1.4%

Specialized REITs 1.4%

Equinix, Inc.

18,041

18,883,876

Total Real Estate

18,883,876

Total Common Stocks

(Cost $741,679,130)

1,309,565,620

Money Market Funds 0.3%

Shares

Value ($)

Columbia Short-Term Cash Fund, 3.871%(b),(c)

3,781,482

3,779,591

Total Money Market Funds

(Cost $3,778,835)

3,779,591

Total Investments in Securities

(Cost: $745,457,965)

1,313,345,211

Other Assets & Liabilities, Net

(1,223,890

)

Net Assets

1,312,121,321

The accompanying Notes to Financial Statements are an integral part of this statement.

4

Columbia Large Cap Growth Opportunity Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Notes to Portfolio of Investments 

(a)

Non-income producing investment.

(b)

The rate shown is the seven-day current annualized yield at August 31, 2026.

(c)

Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The values of the holdings and transactions in these affiliated companies during the period ended August 31, 2026 are as follows:

Affiliated issuers

Beginning

of period($)

Purchases($)

Sales($)

Net change in

unrealized

appreciation

(depreciation)($)

End of

period($)

Realized gain

(loss)($)

Dividends($)

End of

period shares

Columbia Short-Term Cash Fund, 3.871%

6,731,753

94,231,310

(97,183,377

)

(95

)

3,779,591

(1,972

)

125,529

3,781,482

Abbreviation Legend 

ADR

American Depositary Receipt

Fair value measurements  

The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.

Fair value inputs are summarized in the three broad levels listed below:

■

 Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date.  Valuation adjustments are not applied to Level 1 investments.

■

 Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).

■

 Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).

Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by Columbia Management Investment Advisers, LLC (the Investment Manager), along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.

Investments falling into the Level 3 category, if any, are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.

The Fund’s Board of Trustees (the Board) has designated the Investment Manager, through its Valuation Committee (the Committee), as valuation designee, responsible for determining the fair value of the assets of the Fund for which market quotations are not readily available using valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.

The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third-party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third-party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. Representatives of the Investment Manager report to the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Growth Opportunity Fund  | 2026

5


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Fair value measurements   (continued)

The following table is a summary of the inputs used to value the Fund’s investments at August 31, 2026: 

Level 1 ($)

Level 2 ($)

Level 3 ($)

Total ($)

Investments in Securities

Common Stocks

Communication Services

142,450,638

—

—

142,450,638

Consumer Discretionary

104,509,695

—

—

104,509,695

Consumer Staples

25,005,534

—

—

25,005,534

Financials

75,194,418

—

—

75,194,418

Health Care

122,239,631

—

—

122,239,631

Industrials

133,497,432

—

—

133,497,432

Information Technology

687,784,396

—

—

687,784,396

Real Estate

18,883,876

—

—

18,883,876

Total Common Stocks

1,309,565,620

—

—

1,309,565,620

Money Market Funds

3,779,591

—

—

3,779,591

Total Investments in Securities

1,313,345,211

—

—

1,313,345,211

See the Portfolio of Investments for all investment classifications not indicated in the table.

The accompanying Notes to Financial Statements are an integral part of this statement.

6

Columbia Large Cap Growth Opportunity Fund  | 2026


Statement of Assets and Liabilities

August 31, 2026 (Unaudited)

Assets

Investments in securities, at value

Unaffiliated issuers (cost $741,679,130)

$1,309,565,620

Affiliated issuers (cost $3,778,835)

3,779,591

Receivable for:

Capital shares sold

15,847

Dividends

550,305

Expense reimbursement due from Investment Manager

11,105

Prepaid expenses

5,366

Total assets

1,313,927,834

Liabilities

Payable for:

Capital shares redeemed

838,786

Management services fees

78,482

Distribution and/or service fees

19,885

Transfer agent fees

134,359

Compensation of chief compliance officer

101

Merger fees

122,724

Compensation of board members

2,638

Other expenses

43,352

Deferred compensation of board members

566,186

Total liabilities

1,806,513

Net assets applicable to outstanding capital stock

$1,312,121,321

Represented by

Paid in capital

665,555,445

Total distributable earnings (loss)

646,565,876

Total - representing net assets applicable to outstanding capital stock

$1,312,121,321

Class A

Net assets

$939,961,399

Shares outstanding

48,614,562

Net asset value per share

$19.33

Maximum sales charge

5.75%

Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares)

$20.51

Institutional Class

Net assets

$283,558,086

Shares outstanding

11,756,328

Net asset value per share

$24.12

Institutional 2 Class

Net assets

$33,021,358

Shares outstanding

1,241,005

Net asset value per share

$26.61

Institutional 3 Class

Net assets

$2,366,836

Shares outstanding

96,202

Net asset value per share

$24.60

Class R

Net assets

$13,365,967

Shares outstanding

693,942

Net asset value per share

$19.26

Class S

Net assets

$39,847,675

Shares outstanding

1,651,953

Net asset value per share

$24.12

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Growth Opportunity Fund  | 2026

7


Statement of Operations

Six Months Ended August 31, 2026 (Unaudited)

Net investment income

Income:

Dividends — unaffiliated issuers

$3,222,784

Dividends — affiliated issuers

125,529

Total income

3,348,313

Expenses:

Management services fees

4,710,375

Distribution and/or service fees

Class A

1,158,723

Class R

35,239

Transfer agent fees

Class A

489,106

Institutional Class

147,054

Institutional 2 Class

8,283

Institutional 3 Class

59

Class R

7,433

Class S

20,713

Custodian fees

6,071

Printing and postage fees

25,553

Registration fees

39,620

Accounting services fees

17,207

Legal fees

15,301

Compensation of chief compliance officer

102

Compensation of board members

11,066

Deferred compensation of board members

49,198

Other

136,651

Total expenses

6,877,754

Fees waived or expenses reimbursed by Investment Manager and its affiliates

(518,170

)

Total net expenses

6,359,584

Net investment loss

(3,011,271

)

Realized and unrealized gain (loss) — net

Net realized gain (loss) on:

Investments — unaffiliated issuers

84,816,895

Investments — affiliated issuers

(1,972

)

Net realized gain

84,814,923

Net change in unrealized appreciation (depreciation) on:

Investments — unaffiliated issuers

109,663,081

Investments — affiliated issuers

(95

)

Net change in unrealized appreciation (depreciation)

109,662,986

Net realized and unrealized gain

194,477,909

Net increase in net assets resulting from operations

$191,466,638

The accompanying Notes to Financial Statements are an integral part of this statement.

8

Columbia Large Cap Growth Opportunity Fund  | 2026


Statement of Changes in Net Assets

Six Months Ended

August 31, 2026

(Unaudited)

Year Ended

February 28, 2026

Operations

Net investment loss

$(3,011,271

)

$(5,991,942

)

Net realized gain

84,814,923

88,424,026

Net change in unrealized appreciation (depreciation)

109,662,986

48,503,037

Net increase in net assets resulting from operations

191,466,638

130,935,121

Distributions to shareholders

Net investment income and net realized gains

Class A

(39,809,945

)

(58,753,074

)

Institutional Class

(9,717,523

)

(14,493,010

)

Institutional 2 Class

(1,001,961

)

(1,350,908

)

Institutional 3 Class

(65,625

)

(77,319

)

Class R

(614,855

)

(993,328

)

Class S

(1,370,797

)

(2,081,631

)

Total distributions to shareholders

(52,580,706

)

(77,749,270

)

Decrease in net assets from capital stock activity

(36,390,587

)

(106,958,165

)

Total increase (decrease) in net assets

102,495,345

(53,772,314

)

Net assets at beginning of period

1,209,625,976

1,263,398,290

Net assets at end of period

$1,312,121,321

$1,209,625,976

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Growth Opportunity Fund  | 2026

9


Statement of Changes in Net Assets  (continued)

Six Months Ended

Year Ended

August 31, 2026 (Unaudited)

February 28, 2026

Shares

Dollars ($)

Shares

Dollars ($)

Capital stock activity

Class A

Shares sold

699,129

13,052,745

1,286,335

22,108,986

Distributions reinvested

1,481,004

27,813,261

2,364,961

40,955,464

Shares redeemed

(3,557,904

)

(66,471,013

)

(7,763,846

)

(133,648,983

)

Net decrease

(1,377,771

)

(25,605,007

)

(4,112,550

)

(70,584,533

)

Institutional Class

Shares sold

434,530

10,065,833

712,861

14,879,283

Distributions reinvested

334,458

7,833,009

548,752

11,682,661

Shares redeemed

(1,181,854

)

(27,135,410

)

(2,632,805

)

(55,268,280

)

Net decrease

(412,866

)

(9,236,568

)

(1,371,192

)

(28,706,336

)

Institutional 2 Class

Shares sold

75,708

1,988,228

212,760

5,120,938

Distributions reinvested

38,791

1,001,960

57,614

1,350,908

Shares redeemed

(89,762

)

(2,332,070

)

(215,682

)

(5,109,124

)

Net increase

24,737

658,118

54,692

1,362,722

Institutional 3 Class

Shares sold

17,004

413,635

46,452

1,029,557

Distributions reinvested

1,888

45,079

3,493

75,393

Shares redeemed

(7,447

)

(183,438

)

(26,357

)

(596,464

)

Net increase

11,445

275,276

23,588

508,486

Class R

Shares sold

30,401

572,760

80,635

1,394,513

Distributions reinvested

32,845

614,855

57,411

993,328

Shares redeemed

(141,065

)

(2,619,290

)

(314,799

)

(5,395,145

)

Net decrease

(77,819

)

(1,431,675

)

(176,753

)

(3,007,304

)

Class S

Shares sold

6,263

142,261

5,462

122,142

Distributions reinvested

58,531

1,370,797

97,941

2,081,631

Shares redeemed

(113,203

)

(2,563,789

)

(413,156

)

(8,734,973

)

Net decrease

(48,409

)

(1,050,731

)

(309,753

)

(6,531,200

)

Total net decrease

(1,880,683

)

(36,390,587

)

(5,891,968

)

(106,958,165

)

The accompanying Notes to Financial Statements are an integral part of this statement.

10

Columbia Large Cap Growth Opportunity Fund  | 2026


[THIS PAGE INTENTIONALLY LEFT BLANK]

Columbia Large Cap Growth Opportunity Fund  | 2026

11


Financial Highlights

The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The ratios of expenses and net investment income are annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher. A zero balance may reflect an amount rounding to less than $0.01 or 0.01%. 

Net asset value,

beginning of

period

Net

investment

income

(loss)

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class A

Six Months Ended 8/31/2026 (Unaudited)

$17.37

(0.05

)

2.84

2.79

(0.83

)

(0.83

)

Year Ended 2/28/2026

$16.71

(0.09

)

1.90

1.81

(1.15

)

(1.15

)

Year Ended 2/28/2025

$15.16

(0.09

)

2.25

2.16

(0.61

)

(0.61

)

Year Ended 2/29/2024

$11.39

(0.01

)

3.78

3.77

—

—

Year Ended 2/28/2023

$16.74

(0.02

)

(2.75

)

(2.77

)

(2.58

)

(2.58

)

Year Ended 2/28/2022

$23.37

(0.09

)

1.57

1.48

(8.11

)

(8.11

)

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$21.45

(0.03

)

3.53

3.50

(0.83

)

(0.83

)

Year Ended 2/28/2026

$20.35

(0.06

)

2.31

2.25

(1.15

)

(1.15

)

Year Ended 2/28/2025

$18.30

(0.06

)

2.72

2.66

(0.61

)

(0.61

)

Year Ended 2/29/2024

$13.71

0.03

4.56

4.59

—

—

Year Ended 2/28/2023

$19.45

0.02

(3.18

)

(3.16

)

(2.58

)

(2.58

)

Year Ended 2/28/2022

$26.05

(0.03

)

1.65

1.62

(8.22

)

(8.22

)

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$23.59

(0.03

)

3.88

3.85

(0.83

)

(0.83

)

Year Ended 2/28/2026

$22.25

(0.05

)

2.54

2.49

(1.15

)

(1.15

)

Year Ended 2/28/2025

$19.94

(0.05

)

2.97

2.92

(0.61

)

(0.61

)

Year Ended 2/29/2024

$14.94

0.04

4.96

5.00

—

—

Year Ended 2/28/2023

$20.90

0.03

(3.41

)

(3.38

)

(2.58

)

(2.58

)

Year Ended 2/28/2022

$27.46

(0.02

)

1.70

1.68

(8.24

)

(8.24

)

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$21.86

(0.02

)

3.59

3.57

(0.83

)

(0.83

)

Year Ended 2/28/2026

$20.69

(0.04

)

2.36

2.32

(1.15

)

(1.15

)

Year Ended 2/28/2025

$18.58

(0.04

)

2.76

2.72

(0.61

)

(0.61

)

Year Ended 2/29/2024

$13.90

0.04

4.64

4.68

—

—

Year Ended 2/28/2023

$19.67

0.04

(3.23

)

(3.19

)

(2.58

)

(2.58

)

Year Ended 2/28/2022

$26.27

(0.01

)

1.67

1.66

(8.26

)

(8.26

)

Class R

Six Months Ended 8/31/2026 (Unaudited)

$17.32

(0.07

)

2.84

2.77

(0.83

)

(0.83

)

Year Ended 2/28/2026

$16.71

(0.14

)

1.90

1.76

(1.15

)

(1.15

)

Year Ended 2/28/2025

$15.20

(0.13

)

2.25

2.12

(0.61

)

(0.61

)

Year Ended 2/29/2024

$11.45

(0.04

)

3.79

3.75

—

—

Year Ended 2/28/2023

$16.85

(0.05

)

(2.77

)

(2.82

)

(2.58

)

(2.58

)

Year Ended 2/28/2022

$23.44

(0.15

)

1.57

1.42

(8.01

)

(8.01

)

The accompanying Notes to Financial Statements are an integral part of this statement.

12

Columbia Large Cap Growth Opportunity Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income (loss)

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class A

Six Months Ended 8/31/2026 (Unaudited)

$19.33

16.20%

1.12%

(c)

1.04%

(c)

(0.52%

)

26%

$939,961

Year Ended 2/28/2026

$17.37

10.97%

1.12%

1.05%

(d)

(0.54%

)

53%

$868,154

Year Ended 2/28/2025

$16.71

14.32%

1.11%

1.05%

(d)

(0.54%

)

35%

$904,058

Year Ended 2/29/2024

$15.16

33.10%

1.13%

(e)

1.05%

(d),(e)

(0.09%

)

100%

$907,931

Year Ended 2/28/2023

$11.39

(15.76%

)

1.12%

(e)

1.05%

(d),(e)

(0.13%

)

74%

$766,362

Year Ended 2/28/2022

$16.74

2.77%

1.08%

(e)

1.04%

(d),(e)

(0.38%

)

93%

$1,094,509

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$24.12

16.43%

0.87%

(c)

0.79%

(c)

(0.27%

)

26%

$283,558

Year Ended 2/28/2026

$21.45

11.17%

0.87%

0.80%

(d)

(0.29%

)

53%

$261,081

Year Ended 2/28/2025

$20.35

14.60%

0.86%

0.80%

(d)

(0.30%

)

35%

$275,482

Year Ended 2/29/2024

$18.30

33.48%

0.88%

(e)

0.80%

(d),(e)

0.16%

100%

$307,125

Year Ended 2/28/2023

$13.71

(15.55%

)

0.86%

(e)

0.80%

(d),(e)

0.12%

74%

$282,203

Year Ended 2/28/2022

$19.45

2.99%

0.83%

(e)

0.79%

(d),(e)

(0.14%

)

93%

$468,670

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$26.61

16.43%

0.82%

(c)

0.73%

(c)

(0.21%

)

26%

$33,021

Year Ended 2/28/2026

$23.59

11.30%

0.81%

0.74%

(0.24%

)

53%

$28,686

Year Ended 2/28/2025

$22.25

14.70%

0.81%

0.74%

(0.24%

)

35%

$25,843

Year Ended 2/29/2024

$19.94

33.47%

0.82%

(e)

0.74%

(e)

0.22%

100%

$23,803

Year Ended 2/28/2023

$14.94

(15.51%

)

0.81%

(e)

0.74%

(e)

0.18%

74%

$20,199

Year Ended 2/28/2022

$20.90

3.09%

0.77%

(e)

0.74%

(e)

(0.08%

)

93%

$31,012

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$24.60

16.44%

0.77%

(c)

0.69%

(c)

(0.17%

)

26%

$2,367

Year Ended 2/28/2026

$21.86

11.33%

0.77%

0.70%

(0.18%

)

53%

$1,853

Year Ended 2/28/2025

$20.69

14.70%

0.77%

0.70%

(0.19%

)

35%

$1,266

Year Ended 2/29/2024

$18.58

33.67%

0.78%

(e)

0.70%

(e)

0.26%

100%

$1,094

Year Ended 2/28/2023

$13.90

(15.52%

)

0.77%

(e)

0.70%

(e)

0.24%

74%

$993

Year Ended 2/28/2022

$19.67

3.14%

0.73%

(e)

0.69%

(e)

(0.03%

)

93%

$1,406

Class R

Six Months Ended 8/31/2026 (Unaudited)

$19.26

16.13%

1.37%

(c)

1.29%

(c)

(0.78%

)

26%

$13,366

Year Ended 2/28/2026

$17.32

10.66%

1.37%

1.30%

(d)

(0.79%

)

53%

$13,369

Year Ended 2/28/2025

$16.71

14.01%

1.36%

1.30%

(d)

(0.79%

)

35%

$15,851

Year Ended 2/29/2024

$15.20

32.75%

1.38%

(e)

1.30%

(d),(e)

(0.34%

)

100%

$16,883

Year Ended 2/28/2023

$11.45

(15.98%

)

1.37%

(e)

1.30%

(d),(e)

(0.38%

)

74%

$14,256

Year Ended 2/28/2022

$16.85

2.50%

1.33%

(e)

1.29%

(d),(e)

(0.64%

)

93%

$20,484

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Growth Opportunity Fund  | 2026

13


Financial Highlights (continued)

Net asset value,

beginning of

period

Net

investment

income

(loss)

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class S

Six Months Ended 8/31/2026 (Unaudited)

$21.46

(0.03

)

3.52

3.49

(0.83

)

(0.83

)

Year Ended 2/28/2026

$20.35

(0.06

)

2.32

2.26

(1.15

)

(1.15

)

Year Ended 2/28/2025(f)

$19.56

(0.02

)

1.01

0.99

(0.20

)

(0.20

)

Notes to Financial Highlights

(a)

In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.

(b)

Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.

(c)

Ratios include reorganization fee expense.  For the periods indicated below, if reorganization fee expense had been excluded, expenses would have been lower by:

Class A

Institutional Class

Institutional 2 Class

Institutional 3 Class

Class R

Class S

08/31/2026

0.01%

0.01%

0.01%

0.01%

0.01%

0.01%

(d)

The benefits derived from expense reductions had an impact of less than 0.01%.

(e)

Ratios include interfund lending expense which is less than 0.01%.

(f)

Class S shares commenced operations on October 2, 2024. Per share data and total return reflect activity from that date.

The accompanying Notes to Financial Statements are an integral part of this statement.

14

Columbia Large Cap Growth Opportunity Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income (loss)

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class S

Six Months Ended 8/31/2026 (Unaudited)

$24.12

16.38%

0.87%

(c)

0.79%

(c)

(0.27%

)

26%

$39,848

Year Ended 2/28/2026

$21.46

11.22%

0.87%

0.80%

(d)

(0.29%

)

53%

$36,483

Year Ended 2/28/2025

(f)

$20.35

5.01%

0.88%

0.80%

(0.29%

)

35%

$40,899

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Large Cap Growth Opportunity Fund  | 2026

15


Notes to Financial Statements

August 31, 2026 (Unaudited)

Note 1. Organization

Columbia Large Cap Growth Opportunity Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

Fund shares

The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different net investment income distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.

As described in the Fund’s prospectus, Class A shares are offered to the general public for investment. Institutional Class, Institutional 2 Class, Institutional 3 Class, Class R and Class S shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus. 

Note 2. Summary of significant accounting policies

Basis of preparation

The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification (Topic 946), Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which require management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

Segment reporting

The intent of FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures is to enable investors to better understand an entity’s overall performance and to assess its potential future cash flows through improved segment disclosures. The chief operating decision maker (CODM) for the Fund is Columbia Management Investment Advisers, LLC through its Investment Oversight Committee and Global Executive Group, which are responsible for assessing performance and making decisions about resource allocation. The CODM has determined that the Fund has a single operating segment because the CODM monitors the operating results of the Fund as a whole and the Fund’s long-term strategic asset allocation is pre-determined in accordance with the terms of its prospectus, based on a defined investment strategy which is executed by the Fund’s portfolio managers as a team. The financial information provided to and reviewed by the CODM is consistent with that presented within the Fund’s financial statements.

Security valuation

Equity securities listed on an exchange are valued at the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. Securities with a closing price not readily available or not listed on any exchange are valued at the mean between the closing bid and ask prices. Listed preferred stocks convertible into common stocks are valued using an evaluated price from a pricing service.

16

Columbia Large Cap Growth Opportunity Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Foreign equity securities are valued based on the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy approved by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including relevant general and sector indices, currency fluctuations, depositary receipts, and futures, as applicable, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.

Investments in open-end investment companies (other than exchange-traded funds (ETFs)) are valued at the latest net asset value reported by those companies as of the valuation time. 

Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.

The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.

GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.

Security transactions

Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.

Income recognition

Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of an ex-dividend notification in the case of certain foreign securities.

The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.

Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.

Columbia Large Cap Growth Opportunity Fund  | 2026

17


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Expenses

General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.

Determination of class net asset value

All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.

Federal income tax status

The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.

Distributions to shareholders

Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.

Guarantees and indemnifications

Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.

Note 3. Fees and other transactions with affiliates

Management services fees

The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice and is responsible for administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.77% to 0.57% as the Fund’s net assets increase. The annualized effective management services fee rate for the six months ended August 31, 2026 was 0.73% of the Fund’s average daily net assets.

Compensation of Board members

Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund. The expense for the Deferred Plan, which includes Trustees’ fees deferred during the current period as well as any gains or losses on the Trustees’ deferred compensation balances as a result of market fluctuations, is included in "Deferred compensation of board members" in the Statement of Operations.

18

Columbia Large Cap Growth Opportunity Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Compensation of Chief Compliance Officer

The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.

Transfer agency fees

Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with SS&C GIDS, Inc. (SS&C GIDS) to serve as sub-transfer agent. The Transfer Agent pays the fees of SS&C GIDS for services as sub-transfer agent and SS&C GIDS is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).

The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.

The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.

For the six months ended August 31, 2026, the Fund’s annualized effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows: 

Effective rate (%)

Class A

0.11

Institutional Class

0.11

Institutional 2 Class

0.05

Institutional 3 Class

0.01

Class R

0.11

Class S

0.11

An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the six months ended August 31, 2026, no minimum account balance fees were charged by the Fund.

Distribution and service fees

The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.

Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly distribution fee to the Distributor at the maximum annual rate of 0.50% of the average daily net assets attributable to Class R shares of the Fund.

Columbia Large Cap Growth Opportunity Fund  | 2026

19


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Sales charges

Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the six months ended August 31, 2026, if any, are listed below: 

Front End (%)

CDSC (%)

Amount ($)

Class A

5.75

0.50 - 1.00

(a)

26,753

(a)

This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.

The Fund’s other share classes are not subject to sales charges.

Expenses waived/reimbursed by the Investment Manager and its affiliates

The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the classes’ average daily net assets: 

July 1, 2026

through

June 30, 2027 (%)

Prior to

July 1, 2026 (%)

Class A

1.01

1.05

Institutional Class

0.76

0.80

Institutional 2 Class

0.70

0.74

Institutional 3 Class

0.66

0.70

Class R

1.26

1.30

Class S

0.76

0.80

Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, costs associated with shareholder meetings, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.

Note 4. Federal tax information

The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.

At August 31, 2026, the approximate cost of all investments for federal income tax purposes and the aggregate gross approximate unrealized appreciation and depreciation based on that cost was: 

Federal

tax cost ($)

Gross unrealized

appreciation ($)

Gross unrealized

(depreciation) ($)

Net unrealized

appreciation ($)

745,458,000

600,544,000

(32,657,000

)

567,887,000

Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.

20

Columbia Large Cap Growth Opportunity Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Under current tax rules, regulated investment companies can elect to treat certain late-year ordinary losses incurred and post-October capital losses (capital losses realized after October 31) as arising on the first day of the following taxable year. The Fund will elect to treat the following late-year ordinary losses and post-October capital losses at February 28, 2026 as arising on March 1, 2026. 

Late year

ordinary losses ($)

Post-October

capital losses ($)

1,003,089

—

Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.

Note 5. Portfolio information

The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $325,266,477 and $413,799,520, respectively, for the six months ended August 31, 2026. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.

Note 6. Affiliated money market fund

The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. The Securities and Exchange Commission has adopted amendments to money market fund rules requiring institutional prime money market funds like the Affiliated MMF to be subject to a discretionary liquidity fee of up to 2% if the imposition of such a fee is determined to be in the best interest of the Affiliated MMF and to a mandatory liquidity fee if daily net redemptions exceed 5% of net assets.

Note 7. Interfund lending

Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.

Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.

The Fund did not borrow or lend money under the Interfund Program during the six months ended August 31, 2026.

Note 8. Line of credit

Effective October 22, 2026, the Fund has access to a revolving credit facility with a syndicate of banks led by State Street Bank and Trust Company, Citibank, N.A. and Wells Fargo Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is an agreement between the Fund and certain other funds managed by the Investment Manager, severally and not jointly, permits aggregate borrowings up to $750 million. Interest is currently charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate and (ii) the overnight bank funding rate, plus 1.00% in each case. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a

Columbia Large Cap Growth Opportunity Fund  | 2026

21


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in October unless extended or renewed. Prior to October 22, 2026, the Fund had access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A., which permitted aggregate borrowings up to $750 million. Interest was charged to each participating fund based on its borrowings at a rate equal to the highest of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case.

The Fund had no borrowings during the six months ended August 31, 2026.

Note 9. Risks and uncertainties

An investment in the Fund involves risks, including market risk and concentration risk, among others. The value of the Fund’s holdings and the Fund’s net asset value may go down. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally.

Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, other conflicts, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.

To the extent that the Fund concentrates its investment in particular issuers, countries, geographic regions, industries or sectors, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of issuers, countries, geographic regions, industries, sectors or investments.

Additional risk factors of the Fund are described more fully in the Fund’s Prospectus and Statement of Additional Information.

Shareholder concentration risk

At August 31, 2026, one unaffiliated shareholder of record owned 25.4% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Fund shares sold to or redeemed by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.

Note 10. Subsequent events

Management has evaluated the events and transactions that have occurred through the date the financial statements were issued. Other than as noted below, there were no items requiring adjustment of the financial statements or additional disclosure.

At a meeting held on June 18, 2026, the Board of Trustees of Columbia Funds Series Trust approved an Agreement and Plan of Reorganization (the Agreement) pursuant to which the Fund will transfer all of its assets and liabilities to Columbia Cornerstone Growth Fund (the Acquiring Fund) in exchange for shares of the Acquiring Fund (the Reorganization). Pursuant to applicable law (including the Investment Company Act of 1940), the Reorganization does not require shareholder approval. The Reorganization is expected to close on or about November 23, 2026, and is expected to be a tax-free reorganization for U.S. federal income tax purposes. Under the Agreement, the expenses of the Reorganization are borne by the Fund, to the extent that such expenses do not exceed the anticipated reduction in expenses that shareholders of the Fund will realize in the first year following the Reorganization. Any amounts in excess of this limit will be borne by the

22

Columbia Large Cap Growth Opportunity Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Investment Manager. The Fund’s reorganization expenses are estimated to be approximately $122,724 and these expenses will be borne in full by the Fund. If the Reorganization does not occur, the Investment Manager will bear all expenses associated with the Reorganization and reimburse the Fund for reorganization expenses borne.

Note 11. Information regarding pending and settled legal proceedings

Ameriprise Financial and certain of its affiliates are involved, in the normal course of business, in legal proceedings that include regulatory inquiries, arbitration and litigation (including class actions) concerning matters arising in connection with the conduct of their activities as part of a diversified financial services firm. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.

There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, it is inherently difficult to determine whether any loss is probable or even reasonably possible, or to reasonably estimate the amount of any loss that may result from such matters. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief, and may lead to further claims, examinations, adverse publicity or reputational damage, each of which could have a material adverse effect on the consolidated financial condition or results of operations or financial condition of Ameriprise Financial or one or more of its affiliates that provide services to the Fund.

Columbia Large Cap Growth Opportunity Fund  | 2026

23


 Approval of Management Agreement

(Unaudited)

Columbia Management Investment Advisers, LLC (the Investment Manager, and together with its domestic and global affiliates, Columbia Threadneedle Investments), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial), serves as the investment manager to Columbia Large Cap Growth Opportunity Fund (the Fund). Under a management agreement (the Management Agreement), the Investment Manager provides investment advice and other services to the Fund. The Investment Manager also provides investment advice and other services to other funds in the Columbia Fund family (collectively, the Funds).

On an annual basis, the Fund’s Board of Trustees (the Board), including the independent Board members (the Independent Trustees), considers renewal of the Management Agreement. The Investment Manager prepared detailed reports for the Board and its Contracts Committee (including its Contracts Subcommittee) in March, April and June 2026, including reports providing the results of analyses performed by a third-party data provider, Broadridge Financial Solutions, Inc. (Broadridge), and comprehensive responses by the Investment Manager to written requests for information by independent legal counsel to the Independent Trustees (Independent Legal Counsel), to assist the Board in making this determination. In addition, throughout the year, the Board (or its committees or subcommittees) regularly meets with portfolio management teams and senior management personnel and reviews information prepared by the Investment Manager addressing the services the Investment Manager provides and Fund performance. The Board also accords appropriate weight to the work, deliberations and conclusions of the various committees (including their subcommittees), such as the Contracts Committee, the Investment Review Committee, the Audit Committee and the Compliance Committee, in determining whether to continue the Management Agreement.

The Board, at its June 18, 2026 Board meeting (the June Meeting), considered the renewal of the Management Agreement for an additional one-year term. At the June Meeting, Independent Legal Counsel reviewed with the Independent Trustees various factors relevant to the Board’s consideration of advisory agreements and the Board’s legal responsibilities related to such consideration. The Independent Trustees considered such information as they, their legal counsel or the Investment Manager believed reasonably necessary to evaluate and to approve the continuation of the Management Agreement. Among other things, the information and factors considered included the following:

•

Information on the investment performance of the Fund relative to the performance of a group of mutual funds determined to be comparable to the Fund by Broadridge, as well as performance relative to one or more benchmarks; 

•

Information on the Fund’s management fees and total expenses, including information comparing the Fund’s expenses to those of a group of comparable mutual funds, as determined by Broadridge; 

•

The Investment Manager’s agreement to contractually limit or cap total operating expenses for the Fund so that total operating expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses and infrequent and/or unusual expenses) would not exceed a specified annual rate, as a percentage of the Fund’s net assets;

•

Terms of the Management Agreement;

•

Descriptions of other agreements and arrangements with affiliates of the Investment Manager relating to the operations of the Fund, including agreements with respect to the provision of transfer agency and shareholder services to the Fund;

•

Descriptions of various services performed by the Investment Manager under the Management Agreement, including portfolio management and portfolio trading practices;

•

Information regarding any recently negotiated management fees of similarly-managed portfolios of other institutional clients of the Investment Manager;

•

Information regarding the resources of the Investment Manager, including information regarding senior management, portfolio managers and other personnel;

•

Information regarding the capabilities of the Investment Manager with respect to compliance monitoring services; 

•

The profitability to the Investment Manager and its affiliates from their relationships with the Fund; and

24

Columbia Large Cap Growth Opportunity Fund  | 2026


Approval of Management Agreement (continued)

(Unaudited)

•

Report provided by the Board’s independent fee consultant, JDL Consultants, LLC (JDL).

Following an analysis and discussion of the foregoing, and the factors identified below, the Board, including all of the Independent Trustees, approved the renewal of the Management Agreement.

Nature, extent and quality of services provided by the Investment Manager

The Board analyzed various reports and presentations it had received detailing the services performed by the Investment Manager, as well as its history, expertise, resources and relative capabilities, and the qualifications of its personnel.

The Board specifically considered the many developments during recent years concerning the services provided by the Investment Manager. Among other things, the Board noted the organization and depth of the equity and credit research departments. The Board further observed the enhancements to the investment risk management department’s processes, systems and oversight over the past several years. The Board also took into account the broad scope of services provided by the Investment Manager to the Fund, including, among other services, investment, risk and compliance oversight. The Board also took into account the information it received concerning the Investment Manager’s ability to attract and retain key portfolio management personnel and that it has sufficient resources to provide competitive and adequate compensation to investment personnel.

In connection with the Board’s evaluation of the overall package of services provided by the Investment Manager, the Board also considered the nature, quality and range of administrative services provided to the Fund by the Investment Manager, as well as the achievements in 2025 in the performance of administrative services, and noted the various enhancements anticipated for 2026.  In evaluating the quality of services provided under the Management Agreement, the Board also took into account the organization and strength of the Fund’s and its service providers’ compliance programs. The Board also reviewed the financial condition of the Investment Manager and its affiliates and each entity’s ability to carry out its responsibilities under the Management Agreement and the Fund’s other service agreements.

In addition, the Board discussed the acceptability of the terms of the Management Agreement, noting that no changes were proposed from the form of agreement previously approved. The Board also noted the wide array of legal and compliance services provided to the Fund under the Management Agreement.

After reviewing these and related factors (including investment performance as discussed below), the Board concluded, within the context of its overall conclusions, that the nature, extent and quality of the services provided to the Fund under the Management Agreement supported the continuation of the Management Agreement.

Investment performance

The Board carefully reviewed the investment performance of the Fund, including detailed reports providing the results of analyses performed by each of the Investment Manager, Broadridge and JDL collectively showing, for various periods (including since manager inception): (i) the performance of the Fund, (ii) the Fund’s performance relative to peers and benchmarks, and (iii) the net assets of the Fund. The Board observed that Fund performance was well within the range of that of its peers.

The Board also reviewed a description of the third-party data provider’s methodology for identifying the Fund’s peer groups for purposes of performance and expense comparisons. 

The Board also considered the Investment Manager’s performance and reputation generally.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the performance of the Fund and the Investment Manager, in light of other considerations, supported the continuation of the Management Agreement. 

Comparative fees, costs of services provided and the profits realized by the Investment Manager and its affiliates from their relationships with the Fund

The Board reviewed comparative fees and the costs of services provided under the Management Agreement. The Board members considered detailed comparative information set forth in an annual report on fees and expenses, including, among other things, data (based on analyses conducted by Broadridge and JDL) showing a comparison of the Fund’s expenses

Columbia Large Cap Growth Opportunity Fund  | 2026

25


Approval of Management Agreement (continued)

(Unaudited)

with median expenses paid by funds in its comparative peer universe, as well as data showing the Fund’s contribution to the Investment Manager’s profitability. The Board reviewed the fees charged to comparable institutional or other accounts/vehicles managed by the Investment Manager and discussed differences in how the products are managed and operated, thus explaining many of the differences in fees.

The Board considered the reports of JDL, which assisted in the Board’s analysis of the Funds’ performance and expenses and the reasonableness of the Funds’ fee rates. The Board accorded particular weight to the notion that a primary objective of the level of fees is to achieve a rational pricing model applied consistently across the various product lines in the Fund family, while assuring that the overall fees for each Fund (with certain exceptions) are generally in line with the current “pricing philosophy” such that Fund total expense ratios, in general, approximate or are lower than the median expense ratios of funds in the same Lipper comparison universe. The Board took into account that the Fund’s total expense ratio (after considering proposed expense caps/waivers) approximated the peer universe’s median expense ratio.
After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the levels of management fees and expenses of the Fund, in light of other considerations, supported the continuation of the Management Agreement.

The Board also considered the profitability of the Investment Manager and its affiliates in connection with the Investment Manager providing management services to the Fund. With respect to the profitability of the Investment Manager and its affiliates, the Independent Trustees referred to information discussing the profitability to the Investment Manager and Ameriprise Financial from managing, operating and distributing the Funds. The Board considered that the profitability generated by the Investment Manager in 2025 had increased slightly from 2024 levels due to a variety of factors, including the increased assets under management of the Funds. It also took into account the indirect economic benefits flowing to the Investment Manager or its affiliates in connection with managing or distributing the Funds, such as the enhanced ability to offer various other financial products to Ameriprise Financial customers, soft dollar benefits and overall reputational advantages. The Board noted that the fees paid by the Fund should permit the Investment Manager to offer competitive compensation to its personnel, make necessary investments in its business and earn an appropriate profit. After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the costs of services provided and the profitability to the Investment Manager and its affiliates from their relationships with the Fund supported the continuation of the Management Agreement.

Economies of scale

The Board considered the potential existence of economies of scale in the provision by the Investment Manager of services to the Fund, and whether those economies of scale were shared with the Fund through breakpoints in investment management fees or other means, such as expense limitation arrangements and additional investments by the Investment Manager in investment, trading, compliance and other resources. The Board considered the economies of scale that might be realized as the Fund’s net asset level grows and took note of the extent to which Fund shareholders might also benefit from such growth. In this regard, the Board took into account that management fees decline as Fund assets exceed various breakpoints, all of which have not been surpassed. The Board observed that the Management Agreement thus provides for breakpoints in the management fee rate schedule that allow opportunities for shareholders to realize lower fees as Fund assets grow and that there are additional opportunities through other means for sharing economies of scale with shareholders. 

Conclusion

The Board reviewed all of the above considerations in reaching its decision to approve the continuation of the Management Agreement. In reaching its conclusions, no single factor was determinative. 

On June 18, 2026, the Board, including all of the Independent Trustees, determined that fees payable under the Management Agreement were fair and reasonable in light of the extent and quality of services provided and approved the renewal of the Management Agreement.

26

Columbia Large Cap Growth Opportunity Fund  | 2026


[THIS PAGE INTENTIONALLY LEFT BLANK]


Columbia Large Cap Growth Opportunity Fund

P.O. Box 219104

Kansas City, MO 64121-9104

  

Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.

Columbia Threadneedle Investments® (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.

© 2026 Columbia Management Investment Advisers, LLC.

columbiathreadneedleus.com/investor/

SAR186_(10/26)



  

Columbia Mid Cap Index Fund

Semi-Annual Financial Statements and Additional Information

August 31, 2026 (Unaudited)

Not FDIC or NCUA Insured

No Financial Institution Guarantee

May Lose Value


Table of Contents

Portfolio of Investments

3

Statement of Assets and Liabilities

13

Statement of Operations

14

Statement of Changes in Net Assets

15

Financial Highlights

16

Notes to Financial Statements

20

Approval of Management Agreement

30

Columbia Mid Cap Index Fund | 2026


Portfolio of Investments

August 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

Investments in securities

Common Stocks 98.8%

Issuer

Shares

Value ($)

Communication Services 1.6%

Entertainment 0.7%

Roku, Inc.(a)

89,115

13,984,817

Warner Music Group Corp., Class A

99,333

2,802,184

Total

16,787,001

Interactive Media & Services 0.3%

Pinterest, Inc., Class A(a)

327,239

7,104,359

Media 0.6%

New York Times Co. (The), Class A

109,419

7,360,616

Nexstar Media Group, Inc., Class A

19,500

3,551,535

Sirius XM Holdings, Inc.

128,048

3,607,112

Total

14,519,263

Total Communication Services

38,410,623

Consumer Discretionary 9.8%

Automobile Components 1.0%

Autoliv, Inc.

46,784

5,670,689

BorgWarner, Inc.

139,329

8,939,349

Gentex Corp.

144,653

3,235,887

Lear Corp.

34,028

4,253,160

Visteon Corp.

18,133

1,846,302

Total

23,945,387

Automobiles 0.2%

Harley-Davidson, Inc.

71,506

1,973,566

Thor Industries, Inc.

35,727

2,715,252

Total

4,688,818

Broadline Retail 0.3%

Macy’s, Inc.

179,151

3,934,156

Ollie’s Bargain Outlet Holdings, Inc.(a)

41,205

3,107,681

Total

7,041,837

Diversified Consumer Services 0.9%

Duolingo, Inc.(a)

27,332

4,054,976

Graham Holdings Co., Class B

2,271

2,563,709

Grand Canyon Education, Inc.(a)

17,811

2,638,343

H&R Block, Inc.

86,105

4,447,323

Service Corp. International

93,720

7,651,301

Total

21,355,652

Common Stocks (continued)

Issuer

Shares

Value ($)

Hotels, Restaurants & Leisure 2.3%

Aramark

178,617

10,057,923

Boyd Gaming Corp.

37,363

2,898,995

Cava Group, Inc.(a)

68,005

4,471,329

Choice Hotels International, Inc.

13,788

1,425,128

Churchill Downs, Inc.

44,976

3,934,500

Dutch Bros, Inc., Class A(a)

86,668

4,234,598

Hilton Grand Vacations, Inc.(a)

40,791

1,729,946

Hyatt Hotels Corp., Class A

27,870

4,653,454

Planet Fitness, Inc., Class A(a)

53,749

2,773,448

Texas Roadhouse, Inc.

44,649

8,733,344

Travel + Leisure Co.

42,402

2,915,562

Vail Resorts, Inc.

24,205

3,313,907

Wingstop, Inc.

18,499

2,025,271

Wyndham Hotels & Resorts, Inc.

50,850

3,745,611

Total

56,913,016

Household Durables 1.3%

KB Home

42,555

2,268,181

SharkNinja, Inc.(a)

48,065

9,252,032

Somnigroup International, Inc.

156,308

10,120,943

Toll Brothers, Inc.

64,332

9,228,425

Whirlpool Corp.

44,033

1,798,308

Total

32,667,889

Leisure Products 0.4%

Brunswick Corp.

44,135

3,349,847

Mattel, Inc.(a)

197,396

2,951,070

Polaris, Inc.

36,709

2,369,199

YETI Holdings, Inc.(a)

51,460

2,112,433

Total

10,782,549

Specialty Retail 2.9%

Abercrombie & Fitch Co., Class A(a)

30,390

4,348,201

AutoNation, Inc.(a)

17,047

3,430,709

Bath & Body Works, Inc.

136,794

2,633,285

Burlington Stores, Inc.(a)

42,679

11,086,297

Chewy, Inc., Class A(a)

163,160

3,883,208

Dick’s Sporting Goods, Inc.

44,749

6,045,590

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Mid Cap Index Fund  | 2026

3


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Five Below, Inc.(a)

37,560

9,271,310

Floor & Decor Holdings, Inc., Class A(a)

73,425

3,691,075

GameStop Corp., Class A(a)

280,203

5,150,131

Gap, Inc. (The)

151,381

3,377,310

Lithia Motors, Inc., Class A

15,491

5,690,154

Murphy U.S.A., Inc.

11,418

5,884,723

Penske Automotive Group, Inc.

12,505

2,708,458

Restoration Hardware Holdings, Inc.(a)

10,528

1,570,251

Valvoline, Inc.(a)

86,632

2,777,422

Total

71,548,124

Textiles, Apparel & Luxury Goods 0.5%

Capri Holdings Ltd.(a)

80,943

1,072,495

Columbia Sportswear Co.

16,327

937,170

Crocs, Inc.(a)

33,753

4,063,186

PVH Corp.

31,297

2,320,985

VF Corp.

223,250

3,000,480

Total

11,394,316

Total Consumer Discretionary

240,337,588

Consumer Staples 3.3%

Beverages 0.5%

Boston Beer Co., Inc. (The), Class A(a)

5,079

903,097

Celsius Holdings, Inc.(a)

107,663

3,386,002

Coca-Cola Bottling Co. Consolidated

38,390

7,507,932

Total

11,797,031

Consumer Staples Distribution & Retail 1.9%

Albertsons Companies, Inc., Class A

241,866

2,987,045

BJ’s Wholesale Club Holdings, Inc.(a)

86,738

7,862,800

Maplebear, Inc.(a)

111,755

5,645,863

Performance Food Group, Inc.(a)

106,707

10,582,133

Sprouts Farmers Market, Inc.(a)

63,882

5,240,879

U.S. Foods Holding Corp.(a)

149,591

15,683,120

Total

48,001,840

Common Stocks (continued)

Issuer

Shares

Value ($)

Food Products 0.7%

Darling Ingredients, Inc.(a)

107,955

7,154,178

Ingredion, Inc.

42,834

4,431,606

Marzetti Co. (The)

13,784

1,552,768

Pilgrim’s Pride Corp.(a)

29,091

912,875

Post Holdings, Inc.(a)

27,092

2,258,389

Total

16,309,816

Personal Care Products 0.2%

elf Beauty, Inc.(a)

40,112

4,374,213

Total Consumer Staples

80,482,900

Energy 5.1%

Energy Equipment & Services 1.4%

NOV, Inc.

243,784

5,190,161

TechnipFMC PLC

270,827

21,165,130

Valaris Ltd.(a)

43,748

3,778,515

Weatherford International PLC

48,857

4,776,749

Total

34,910,555

Oil, Gas & Consumable Fuels 3.7%

Antero Midstream Corp.

225,851

5,063,579

Antero Resources Corp.(a)

199,940

7,693,691

Chord Energy Corp.

38,242

5,625,781

CNX Resources Corp.(a)

96,103

3,496,227

DT Midstream, Inc.

69,295

9,079,031

HF Sinclair Corp.

104,083

10,575,874

Matador Resources Co.

79,290

4,599,613

Murphy Oil Corp.

91,532

3,333,595

Ovintiv, Inc.

187,072

12,281,277

PBF Energy, Inc., Class A

57,058

4,164,663

Permian Resources Corp.

534,625

12,451,416

Range Resources Corp.

160,052

6,613,349

Viper Energy, Inc., Class A

131,926

5,908,966

Total

90,887,062

Total Energy

125,797,617

The accompanying Notes to Financial Statements are an integral part of this statement.

4

Columbia Mid Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Financials 14.8%

Banks 5.5%

Associated Banc-Corp.

110,968

3,396,730

Bank OZK

69,704

3,421,072

Columbia Banking System, Inc.

196,642

5,828,469

Commerce Bancshares, Inc.

92,091

5,314,572

Cullen/Frost Bankers, Inc.

42,656

6,862,071

East West Bancorp, Inc.

93,058

11,805,338

First Financial Bankshares, Inc.

88,568

2,943,115

First Horizon Corp.

322,394

7,840,622

Flagstar Bank

203,854

2,713,297

FNB Corp.

241,797

4,407,959

Glacier Bancorp, Inc.

87,519

4,053,005

Hancock Whitney Corp.

55,128

4,106,485

Home Bancshares, Inc.

127,237

3,748,402

International Bancshares Corp.

36,747

2,578,169

Old National Bancorp

233,583

5,975,053

Pinnacle Financial Partners, Inc.

102,163

10,213,235

Prosperity Bancshares, Inc.

80,029

5,726,875

SouthState Bank Corp.

66,343

6,958,717

Texas Capital Bancshares, Inc.

29,665

2,882,845

UMB Financial Corp.

48,514

6,871,038

United Bankshares, Inc.

93,383

4,401,141

Valley National Bancorp

323,709

4,415,391

Western Alliance Bancorp

69,555

5,434,332

Wintrust Financial Corp.

45,816

6,888,894

Zions Bancorp NA

99,915

6,663,331

Total

135,450,158

Capital Markets 2.4%

Affiliated Managers Group, Inc.

17,941

6,605,697

Carlyle Group, Inc. (The)

176,055

8,519,301

Evercore, Inc., Class A

26,276

7,526,234

Federated Hermes, Inc., Class B

49,194

3,131,198

Hamilton Lane, Inc., Class A

27,757

3,020,517

Houlihan Lokey, Inc., Class A

36,830

4,909,071

Jefferies Financial Group, Inc.

111,092

5,847,883

Morningstar, Inc.

14,982

3,280,159

Common Stocks (continued)

Issuer

Shares

Value ($)

SEI Investments Co.

62,091

6,890,859

Stifel Financial Corp.

104,201

8,417,357

Total

58,148,276

Consumer Finance 0.7%

Ally Financial, Inc.

189,473

7,997,655

FirstCash Holdings, Inc.

26,204

5,619,972

SLM Corp.

128,106

3,326,913

Total

16,944,540

Financial Services 2.0%

Corebridge Financial, Inc.

164,430

5,350,552

Equitable Holdings, Inc.

191,228

9,586,260

Essent Group Ltd.

62,597

4,229,053

Euronet Worldwide, Inc.(a)

24,053

1,671,924

MGIC Investment Corp.

143,659

4,403,148

Shift4 Payments, Inc., Class A(a)

39,875

1,685,915

Toast, Inc., Class A(a)

318,959

10,873,312

Voya Financial, Inc.

61,587

6,239,995

WEX, Inc.(a)

23,549

4,487,969

Total

48,528,128

Insurance 3.6%

American Financial Group, Inc.

46,844

6,677,612

Brighthouse Financial, Inc.(a)

38,843

2,059,456

CNO Financial Group, Inc.

63,410

3,474,234

Fidelity National Financial, Inc.

171,862

7,982,990

First American Financial Corp.

69,218

5,116,595

Hanover Insurance Group, Inc. (The)

23,766

5,373,730

Kinsale Capital Group, Inc.

14,883

5,564,754

Old Republic International Corp.

152,204

6,351,473

Primerica, Inc.

21,182

6,093,002

Reinsurance Group of America, Inc.

44,501

10,949,026

RenaissanceRe Holdings Ltd.

28,960

9,488,454

RLI Corp.

62,451

3,963,765

Ryan Specialty Holdings, Inc., Class A

77,391

3,264,352

Selective Insurance Group, Inc.

40,668

3,712,582

Unum Group

99,849

9,307,924

Total

89,379,949

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Mid Cap Index Fund  | 2026

5


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Mortgage Real Estate Investment Trusts (REITs) 0.6%

Annaly Capital Management, Inc.

497,755

11,408,544

Starwood Property Trust, Inc.

236,728

3,716,630

Total

15,125,174

Total Financials

363,576,225

Health Care 10.3%

Biotechnology 3.4%

Arrowhead Pharmaceuticals, Inc.(a)

95,680

7,883,075

BioMarin Pharmaceutical, Inc.(a)

131,292

8,564,177

Cytokinetics, Inc.(a)

92,226

6,539,746

Exelixis, Inc.(a)

170,738

9,329,124

Halozyme Therapeutics, Inc.(a)

80,570

8,579,899

Krystal Biotech, Inc.(a)

17,822

6,404,514

Neurocrine Biosciences, Inc.(a)

68,301

10,520,403

Roivant Sciences Ltd.(a)

306,278

10,609,470

United Therapeutics Corp.(a)

28,833

14,715,787

Total

83,146,195

Health Care Equipment & Supplies 1.2%

Dentsply Sirona, Inc.

136,077

1,519,980

Envista Holdings Corp.(a)

110,537

2,999,974

Globus Medical, Inc., Class A(a)

76,972

6,263,212

Haemonetics Corp.(a)

31,567

3,253,611

Lantheus Holdings, Inc.(a)

44,225

4,464,956

LivaNova PLC(a)

37,315

2,978,110

Penumbra, Inc.(a)

26,716

8,631,939

Total

30,111,782

Health Care Providers & Services 2.5%

BrightSpring Health Services, Inc.(a)

107,441

6,274,555

Chemed Corp.

9,017

4,677,208

Encompass Health Corp.

67,383

8,100,111

Ensign Group, Inc. (The)

39,370

6,781,876

HealthEquity, Inc.(a)

57,384

5,539,851

Hims & Hers Health, Inc., Class A(a)

143,955

4,258,189

Molina Healthcare, Inc.(a)

35,390

7,034,470

Option Care Health, Inc.(a)

106,665

2,501,294

Tenet Healthcare Corp.(a)

58,510

15,558,394

Total

60,725,948

Common Stocks (continued)

Issuer

Shares

Value ($)

Health Care Technology 0.1%

Doximity, Inc., Class A(a)

90,895

2,427,806

Life Sciences Tools & Services 2.3%

Avantor, Inc.(a)

463,777

6,743,317

Bio-Rad Laboratories, Inc., Class A(a)

12,235

4,724,178

Bruker Corp.

75,484

4,378,827

Illumina, Inc.(a)

102,774

21,955,610

Medpace Holdings, Inc.(a)

15,326

9,103,491

Repligen Corp.(a)

36,017

6,518,357

Sotera Health Co.(a)

180,146

3,404,759

Total

56,828,539

Pharmaceuticals 0.8%

Elanco Animal Health, Inc.(a)

339,262

8,115,147

Jazz Pharmaceuticals PLC(a)

42,620

10,683,982

Total

18,799,129

Total Health Care

252,039,399

Industrials 23.6%

Aerospace & Defense 4.0%

Aerovironment, Inc.(a)

21,904

3,249,458

ATI, Inc.(a)

92,700

18,929,340

BWX Technologies, Inc.

62,231

9,477,159

Carpenter Technology Corp.

33,750

16,079,175

Curtiss-Wright Corp.

25,093

14,617,425

Hexcel Corp.

51,235

4,747,947

Kratos Defense & Security Solutions, Inc.(a)

127,377

6,493,680

Moog, Inc., Class A

19,318

7,176,637

StandardAero, Inc.(a)

128,692

3,151,667

Woodward, Inc.

40,473

13,753,535

Total

97,676,023

Air Freight & Logistics 0.2%

GXO Logistics, Inc.(a)

78,150

3,730,099

Building Products 1.8%

AAON, Inc.

46,182

3,508,446

Advanced Drainage Systems, Inc.

48,680

6,607,336

Carlisle Companies, Inc.

27,424

9,504,610

Fortune Brands Innovations, Inc.

81,032

3,592,149

Louisiana-Pacific Corp.

43,186

3,045,045

Owens Corning

54,700

7,556,805

The accompanying Notes to Financial Statements are an integral part of this statement.

6

Columbia Mid Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Simpson Manufacturing Co., Inc.

27,944

5,102,854

Trex Company, Inc.(a)

70,576

3,216,854

UFP Industries, Inc.

38,365

3,242,610

Total

45,376,709

Commercial Services & Supplies 1.4%

Brink’s Co. (The)

27,973

3,047,099

Clean Harbors, Inc.(a)

33,743

10,637,481

MSA Safety, Inc.

24,649

4,603,693

RB Global, Inc.

126,548

10,703,430

Tetra Tech, Inc.

176,288

6,371,048

Total

35,362,751

Construction & Engineering 2.3%

AECOM

87,302

5,886,774

API Group Corp.(a)

261,909

10,279,928

Dycom Industries, Inc.(a)

20,391

5,938,063

Fluor Corp.(a)

94,874

5,171,582

IES Holdings, Inc.(a)

11,910

3,608,730

MasTec, Inc.(a)

41,854

10,035,752

Sterling Infrastructure, Inc.(a)

20,844

9,798,139

Valmont Industries, Inc.

13,187

6,193,407

Total

56,912,375

Electrical Equipment 2.1%

Acuity, Inc.

20,456

6,787,096

EnerSys

25,032

4,602,383

Nextpower, Inc., Class A(a)

100,856

8,273,218

nVent Electric PLC

109,852

16,560,189

Regal Rexnord Corp.

45,219

7,164,951

Sensata Technologies Holding

98,788

4,053,272

Vicor Corp.(a)

15,872

2,978,857

Total

50,419,966

Ground Transportation 1.7%

Avis Budget Group, Inc.(a)

11,518

1,698,790

Knight-Swift Transportation Holdings, Inc.

110,378

7,561,997

Landstar System, Inc.

23,046

4,162,799

Ryder System, Inc.

26,282

6,424,898

Saia, Inc.(a)

18,117

6,433,890

XPO, Inc.(a)

79,753

15,471,284

Total

41,753,658

Common Stocks (continued)

Issuer

Shares

Value ($)

Machinery 5.5%

AGCO Corp.

40,825

4,830,006

Allison Transmission Holdings, Inc.

56,336

7,081,999

CNH Industrial NV

598,008

7,074,435

Crane Co.

33,341

6,837,239

Donaldson Co., Inc.

78,669

7,150,225

Esab Corp.

38,874

2,930,322

Flowserve Corp.

86,816

6,866,277

Graco, Inc.

112,737

8,729,226

ITT, Inc.

60,727

12,163,011

Lincoln Electric Holdings, Inc.

37,215

10,465,974

Middleby Corp. (The)(a)

28,256

3,131,895

Mueller Industries, Inc.

150,216

9,374,980

Oshkosh Corp.

42,353

6,527,021

RBC Bearings, Inc.(a)

21,427

10,590,509

SPX Technologies, Inc.(a)

34,008

6,691,074

Terex Corp.

77,573

4,926,661

Timken Co. (The)

42,957

5,174,171

Toro Co. (The)

65,844

6,440,202

Watts Water Technologies, Inc., Class A

18,663

6,825,992

Total

133,811,219

Marine Transportation 0.2%

Kirby Corp.(a)

36,341

5,155,334

Passenger Airlines 0.4%

Alaska Air Group, Inc.(a)

75,691

3,128,309

American Airlines Group, Inc.(a)

449,260

6,033,562

Total

9,161,871

Professional Services 2.4%

Booz Allen Hamilton Holding Corp.

81,916

6,196,945

CACI International, Inc., Class A(a)

15,006

9,348,888

ExlService Holdings, Inc.(a)

103,781

3,951,980

Exponent, Inc.

32,953

2,339,993

FTI Consulting, Inc.(a)

20,086

3,024,349

Genpact Ltd.

107,081

4,066,936

KBR, Inc.

86,125

3,229,688

MAXIMUS, Inc.

35,689

2,061,754

Parsons Corp.(a)

36,334

1,767,286

Paylocity Holding Corp.(a)

29,460

4,720,081

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Mid Cap Index Fund  | 2026

7


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Science Applications International Corp.

29,278

3,754,025

TransUnion

130,964

11,120,153

UL Solutions, Inc., Class A

52,853

3,938,606

Total

59,520,684

Trading Companies & Distributors 1.6%

Applied Industrial Technologies, Inc.

25,106

8,133,842

Core & Main, Inc., Class A(a)

127,800

5,490,288

GATX Corp.

24,114

4,218,262

MSC Industrial Direct Co., Inc., Class A

31,100

3,697,168

Watsco, Inc.

23,777

7,366,590

WESCO International, Inc.

33,084

11,261,794

Total

40,167,944

Total Industrials

579,048,633

Information Technology 14.5%

Communications Equipment 0.5%

InterDigital, Inc.

17,556

5,881,787

Viavi Solutions, Inc.(a)

158,887

5,766,009

Total

11,647,796

Electronic Equipment, Instruments & Components 3.5%

Advanced Energy Industries, Inc.

25,833

7,152,124

Arrow Electronics, Inc.(a)

34,734

7,100,672

Avnet, Inc.

55,717

4,990,015

Belden, Inc.

26,454

3,027,925

Cognex Corp.

113,044

6,891,162

Crane NXT Co.

33,615

1,643,773

Fabrinet(a)

24,338

10,049,890

IPG Photonics Corp.(a)

17,299

1,316,108

Littelfuse, Inc.

17,178

7,080,428

Novanta, Inc.(a)

24,190

3,537,062

Sanmina Corp.(a)

36,408

7,162,182

TD SYNNEX Corp.

50,785

12,840,987

TTM Technologies, Inc.(a)

70,542

8,388,855

Vontier Corp.

95,642

3,080,629

Total

84,261,812

Common Stocks (continued)

Issuer

Shares

Value ($)

IT Services 2.1%

DigitalOcean Holdings, Inc.(a)

55,295

6,120,604

Kyndryl Holdings, Inc.(a)

153,140

2,059,733

Okta, Inc.(a)

113,886

19,706,833

Twilio, Inc., Class A(a)

103,096

24,292,510

Total

52,179,680

Semiconductors & Semiconductor Equipment 4.1%

Allegro MicroSystems, Inc.(a)

84,328

3,056,890

Amkor Technology, Inc.

77,452

3,663,480

Cirrus Logic, Inc.(a)

34,648

3,794,303

Entegris, Inc.

103,589

14,014,556

Lattice Semiconductor Corp.(a)

93,066

10,734,232

MACOM Technology Solutions Holdings, Inc.(a)

44,570

11,758,903

MKS, Inc.

45,881

11,756,547

Onto Innovation, Inc.(a)

33,790

9,029,026

Rambus, Inc.(a)

73,454

6,367,727

Semtech Corp.(a)

63,250

8,409,720

Silicon Laboratories, Inc.(a)

22,404

4,907,596

SiTime Corp.(a)

15,062

8,516,356

Synaptics, Inc.(a)

26,246

2,538,513

Universal Display Corp.

29,534

2,456,343

Total

101,004,192

Software 3.5%

Appfolio, Inc., Class A(a)

16,322

3,822,776

Bentley Systems, Inc., Class B

101,255

3,721,121

BILL Holdings, Inc.(a)

60,211

2,964,188

CommVault Systems, Inc.(a)

28,021

3,853,448

DocuSign, Inc.(a)

131,976

8,746,049

Dolby Laboratories, Inc., Class A

40,991

2,523,406

Dropbox, Inc., Class A(a)

101,735

3,580,055

Dynatrace, Inc.(a)

200,150

10,926,188

Guidewire Software, Inc.(a)

57,505

11,774,149

Manhattan Associates, Inc.(a)

40,189

8,969,783

Nutanix, Inc., Class A(a)

180,151

12,352,954

Pegasystems, Inc.

61,299

2,256,416

Qualys, Inc.(a)

23,922

4,452,841

UiPath, Inc., Class A(a)

290,107

5,416,298

Total

85,359,672

The accompanying Notes to Financial Statements are an integral part of this statement.

8

Columbia Mid Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Technology Hardware, Storage & Peripherals 0.8%

Everpure, Inc., Class A(a)

214,341

19,922,996

Total Information Technology

354,376,148

Materials 5.9%

Chemicals 1.6%

Ashland, Inc.

31,103

2,280,783

Avient Corp.

62,296

2,744,762

Axalta Coating Systems Ltd.(a)

145,377

5,294,630

Cabot Corp.

35,065

2,900,226

NewMarket Corp.

5,186

4,655,472

Olin Corp.

77,368

1,346,203

RPM International, Inc.

86,693

9,024,741

Scotts Miracle-Gro Co. (The), Class A

30,431

1,819,774

Solstice Advanced Materials, Inc.

107,871

6,837,943

Westlake Corp.

22,628

1,698,684

Total

38,603,218

Construction Materials 0.3%

Eagle Materials, Inc.

21,351

4,147,645

Knife River Corp.(a)

38,551

2,417,148

Total

6,564,793

Containers & Packaging 1.0%

AptarGroup, Inc.

43,351

5,705,859

Crown Holdings, Inc.

75,056

8,735,768

Graphic Packaging Holding Co.

200,988

2,251,066

Greif, Inc., Class A

16,830

1,392,682

Silgan Holdings, Inc.

59,582

2,475,036

Sonoco Products Co.

67,160

3,703,874

Total

24,264,285

Metals & Mining 3.0%

Alcoa Corp.

179,253

8,953,687

Cleveland-Cliffs, Inc.(a)

387,467

4,475,244

Coeur Mining, Inc.

702,714

14,602,397

Commercial Metals Co.

75,322

5,081,975

Hecla Mining Co.

455,596

9,052,693

MP Materials Corp.(a)

91,903

5,031,689

Common Stocks (continued)

Issuer

Shares

Value ($)

Reliance, Inc.

34,676

13,317,318

Royal Gold, Inc.

55,342

14,470,273

Total

74,985,276

Total Materials

144,417,572

Real Estate 6.9%

Diversified REITs 0.4%

WP Carey, Inc.

151,301

10,585,018

Health Care REITs 1.3%

American Healthcare REIT, Inc.

130,911

7,227,596

CareTrust REIT, Inc.

160,471

6,250,346

Healthcare Realty Trust, Inc.

235,381

4,481,654

Omega Healthcare Investors, Inc.

202,289

9,248,653

Sabra Health Care REIT, Inc.

171,306

3,492,929

Total

30,701,178

Hotel & Resort REITs 0.1%

Park Hotels & Resorts, Inc.

136,780

2,092,734

Industrial REITs 0.9%

EastGroup Properties, Inc.

36,457

7,273,171

First Industrial Realty Trust, Inc.

90,051

5,572,356

Rexford Industrial Realty, Inc.

152,125

5,634,710

STAG Industrial, Inc.

129,880

4,838,030

Total

23,318,267

Office REITs 0.5%

COPT Defense Properties

76,666

2,759,976

Cousins Properties, Inc.

111,768

3,240,154

Kilroy Realty Corp.

72,666

2,637,776

Vornado Realty Trust

107,327

4,011,883

Total

12,649,789

Real Estate Management & Development 0.5%

Jones Lang LaSalle, Inc.(a)

31,514

11,530,027

Residential REITs 1.1%

American Homes 4 Rent, Class A

215,170

7,165,161

Equity LifeStyle Properties, Inc.

131,737

8,358,713

Independence Realty Trust, Inc.

159,818

2,585,855

Sun Communities, Inc.

78,685

9,553,933

Total

27,663,662

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Mid Cap Index Fund  | 2026

9


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Retail REITs 0.9%

Agree Realty Corp.

81,456

5,885,196

Brixmor Property Group, Inc.

208,426

6,021,427

Kite Realty Group Trust

137,938

3,558,801

NNN REIT, Inc.

129,230

5,841,196

Total

21,306,620

Specialized REITs 1.2%

CubeSmart

153,797

6,108,817

EPR Properties

51,970

3,051,159

Gaming and Leisure Properties, Inc.

192,385

8,093,637

Lamar Advertising Co., Class A

59,134

8,811,557

Rayonier, Inc.

187,946

3,852,893

Total

29,918,063

Total Real Estate

169,765,358

Utilities 3.0%

Electric Utilities 0.8%

IDACORP, Inc.

37,637

5,124,654

OGE Energy Corp.

140,184

6,396,596

Portland General Electric Co.

78,612

3,840,982

TXNM Energy, Inc.

67,680

3,899,045

Total

19,261,277

Gas Utilities 1.0%

National Fuel Gas Co.

64,555

5,361,938

New Jersey Resources Corp.

68,553

3,656,617

ONE Gas, Inc.

42,633

3,379,518

Southwest Gas Holdings, Inc.

43,754

3,864,791

Common Stocks (continued)

Issuer

Shares

Value ($)

Spire, Inc.

40,157

3,286,449

UGI Corp.

145,632

5,599,550

Total

25,148,863

Independent Power and Renewable Electricity Producers 0.6%

Ormat Technologies, Inc.

41,743

4,257,786

Talen Energy Corp.(a)

30,836

9,120,056

Total

13,377,842

Multi-Utilities 0.3%

Black Hills Corp.

51,712

3,706,716

Northwestern Energy Group, Inc.

41,781

2,889,574

Total

6,596,290

Water Utilities 0.3%

Essential Utilities, Inc.

192,664

7,931,977

Total Utilities

72,316,249

Total Common Stocks

(Cost $1,461,818,585)

2,420,568,312

Money Market Funds 1.2%

Shares

Value ($)

Columbia Short-Term Cash Fund, 3.871%(b),(c)

29,940,931

29,925,961

Total Money Market Funds

(Cost $29,924,564)

29,925,961

Total Investments in Securities

(Cost: $1,491,743,149)

2,450,494,273

Other Assets & Liabilities, Net

399,886

Net Assets

2,450,894,159

At August 31, 2026, securities and/or cash totaling $2,339,560 were pledged as collateral.

Investments in derivatives 

Long futures contracts

Description

Number of

contracts

Expiration

date

Trading

currency

Notional

amount

Value/Unrealized

appreciation ($)

Value/Unrealized

depreciation ($)

S&P Mid 400 Index E-mini

92

09/2026

USD

34,657,320

—

(268,346

)

The accompanying Notes to Financial Statements are an integral part of this statement.

10

Columbia Mid Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Notes to Portfolio of Investments 

(a)

Non-income producing investment.

(b)

The rate shown is the seven-day current annualized yield at August 31, 2026.

(c)

Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The values of the holdings and transactions in these affiliated companies during the period ended August 31, 2026 are as follows:

Affiliated issuers

Beginning

of period($)

Purchases($)

Sales($)

Net change in

unrealized

appreciation

(depreciation)($)

End of

period($)

Realized gain

(loss)($)

Dividends($)

End of

period shares

Columbia Short-Term Cash Fund, 3.871%

31,766,510

220,956,809

(222,793,909

)

(3,449

)

29,925,961

(4,833

)

548,299

29,940,931

Currency Legend 

USD

US Dollar

Fair value measurements  

The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.

Fair value inputs are summarized in the three broad levels listed below:

■

 Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date.  Valuation adjustments are not applied to Level 1 investments.

■

 Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).

■

 Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).

Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by Columbia Management Investment Advisers, LLC (the Investment Manager), along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.

Investments falling into the Level 3 category, if any, are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.

The Fund’s Board of Trustees (the Board) has designated the Investment Manager, through its Valuation Committee (the Committee), as valuation designee, responsible for determining the fair value of the assets of the Fund for which market quotations are not readily available using valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.

The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third-party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third-party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. Representatives of the Investment Manager report to the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Mid Cap Index Fund  | 2026

11


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Fair value measurements   (continued)

The following table is a summary of the inputs used to value the Fund’s investments at August 31, 2026: 

Level 1 ($)

Level 2 ($)

Level 3 ($)

Total ($)

Investments in Securities

Common Stocks

Communication Services

38,410,623

—

—

38,410,623

Consumer Discretionary

240,337,588

—

—

240,337,588

Consumer Staples

80,482,900

—

—

80,482,900

Energy

125,797,617

—

—

125,797,617

Financials

363,576,225

—

—

363,576,225

Health Care

252,039,399

—

—

252,039,399

Industrials

579,048,633

—

—

579,048,633

Information Technology

354,376,148

—

—

354,376,148

Materials

144,417,572

—

—

144,417,572

Real Estate

169,765,358

—

—

169,765,358

Utilities

72,316,249

—

—

72,316,249

Total Common Stocks

2,420,568,312

—

—

2,420,568,312

Money Market Funds

29,925,961

—

—

29,925,961

Total Investments in Securities

2,450,494,273

—

—

2,450,494,273

Investments in Derivatives

Liability

Futures Contracts

(268,346

)

—

—

(268,346

)

Total

2,450,225,927

—

—

2,450,225,927

See the Portfolio of Investments for all investment classifications not indicated in the table.

Derivative instruments are valued at unrealized appreciation (depreciation).

The accompanying Notes to Financial Statements are an integral part of this statement.

12

Columbia Mid Cap Index Fund  | 2026


Statement of Assets and Liabilities

August 31, 2026 (Unaudited)

Assets

Investments in securities, at value

Unaffiliated issuers (cost $1,461,818,585)

$2,420,568,312

Affiliated issuers (cost $29,924,564)

29,925,961

Margin deposits on:

Futures contracts

2,339,560

Receivable for:

Capital shares sold

1,229,789

Dividends

1,413,072

Foreign tax reclaims

7,602

Expense reimbursement due from Investment Manager

20,362

Prepaid expenses

10,039

Total assets

2,455,514,697

Liabilities

Payable for:

Capital shares redeemed

3,644,733

Variation margin for futures contracts

169,280

Management services fees

40,535

Distribution and/or service fees

9,849

Transfer agent fees

251,689

Compensation of chief compliance officer

197

Compensation of board members

3,923

Other expenses

81,883

Deferred compensation of board members

418,449

Total liabilities

4,620,538

Net assets applicable to outstanding capital stock

$2,450,894,159

Represented by

Paid in capital

1,279,197,597

Total distributable earnings (loss)

1,171,696,562

Total - representing net assets applicable to outstanding capital stock

$2,450,894,159

Class A

Net assets

$476,912,940

Shares outstanding

30,362,545

Net asset value per share

$15.71

Institutional Class

Net assets

$1,140,035,101

Shares outstanding

73,205,581

Net asset value per share

$15.57

Institutional 2 Class

Net assets

$497,547,169

Shares outstanding

30,519,543

Net asset value per share

$16.30

Institutional 3 Class

Net assets

$336,398,949

Shares outstanding

22,483,755

Net asset value per share

$14.96

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Mid Cap Index Fund  | 2026

13


Statement of Operations

Six Months Ended August 31, 2026 (Unaudited)

Net investment income

Income:

Dividends — unaffiliated issuers

$16,790,534

Dividends — affiliated issuers

548,299

Foreign taxes withheld

(20,877

)

Total income

17,317,956

Expenses:

Management services fees

2,532,442

Distribution and/or service fees

Class A

621,875

Transfer agent fees

Class A

291,318

Institutional Class

685,379

Institutional 2 Class

152,095

Institutional 3 Class

8,079

Custodian fees

20,900

Printing and postage fees

31,477

Registration fees

42,982

Licensing fees and expenses

12,653

Accounting services fees

16,880

Legal fees

23,520

Interest on collateral

105

Compensation of chief compliance officer

199

Compensation of board members

16,983

Deferred compensation of board members

46,715

Other

20,795

Total expenses

4,524,397

Fees waived or expenses reimbursed by Investment Manager and its affiliates

(1,369,975

)

Total net expenses

3,154,422

Net investment income

14,163,534

Realized and unrealized gain (loss) — net

Net realized gain (loss) on:

Investments — unaffiliated issuers

203,464,284

Investments — affiliated issuers

(4,833

)

Futures contracts

4,630,192

Net realized gain

208,089,643

Net change in unrealized appreciation (depreciation) on:

Investments — unaffiliated issuers

(82,076,769

)

Investments — affiliated issuers

(3,449

)

Futures contracts

(1,558,375

)

Net change in unrealized appreciation (depreciation)

(83,638,593

)

Net realized and unrealized gain

124,451,050

Net increase in net assets resulting from operations

$138,614,584

The accompanying Notes to Financial Statements are an integral part of this statement.

14

Columbia Mid Cap Index Fund  | 2026


Statement of Changes in Net Assets

Six Months Ended

August 31, 2026

(Unaudited)

Year Ended

February 28, 2026

Operations

Net investment income

$14,163,534

$30,827,170

Net realized gain

208,089,643

242,743,325

Net change in unrealized appreciation (depreciation)

(83,638,593

)

124,322,876

Net increase in net assets resulting from operations

138,614,584

397,893,371

Distributions to shareholders

Net investment income and net realized gains

Class A

(20,911,148

)

(44,837,374

)

Institutional Class

(50,558,291

)

(98,464,709

)

Institutional 2 Class

(21,349,483

)

(44,735,870

)

Institutional 3 Class

(15,596,029

)

(31,486,537

)

Total distributions to shareholders

(108,414,951

)

(219,524,490

)

Decrease in net assets from capital stock activity

(158,244,940

)

(106,384,058

)

Total increase (decrease) in net assets

(128,045,307

)

71,984,823

Net assets at beginning of period

2,578,939,466

2,506,954,643

Net assets at end of period

$2,450,894,159

$2,578,939,466

Six Months Ended

Year Ended

August 31, 2026 (Unaudited)

February 28, 2026

Shares

Dollars ($)

Shares

Dollars ($)

Capital stock activity

Class A

Shares sold

3,324,681

51,869,296

6,850,916

98,337,554

Distributions reinvested

946,669

15,023,629

2,176,418

30,857,840

Shares redeemed

(6,923,543

)

(107,744,100

)

(14,411,279

)

(209,783,207

)

Net decrease

(2,652,193

)

(40,851,175

)

(5,383,945

)

(80,587,813

)

Institutional Class

Shares sold

4,436,728

68,200,095

12,554,864

178,297,408

Distributions reinvested

3,084,079

48,512,571

6,714,460

94,364,940

Shares redeemed

(11,244,701

)

(172,670,621

)

(17,169,411

)

(249,188,638

)

Net increase (decrease)

(3,723,894

)

(55,957,955

)

2,099,913

23,473,710

Institutional 2 Class

Shares sold

2,571,650

41,804,676

9,359,348

137,745,014

Distributions reinvested

883,684

14,554,267

2,074,377

30,405,472

Shares redeemed

(5,960,549

)

(96,763,954

)

(14,888,693

)

(225,288,414

)

Net decrease

(2,505,215

)

(40,405,011

)

(3,454,968

)

(57,137,928

)

Institutional 3 Class

Shares sold

1,056,636

15,876,913

5,040,911

70,790,190

Distributions reinvested

379,808

5,738,905

795,366

10,788,959

Shares redeemed

(2,906,538

)

(42,646,617

)

(5,311,843

)

(73,711,176

)

Net increase (decrease)

(1,470,094

)

(21,030,799

)

524,434

7,867,973

Total net decrease

(10,351,396

)

(158,244,940

)

(6,214,566

)

(106,384,058

)

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Mid Cap Index Fund  | 2026

15


Financial Highlights

The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The ratios of expenses and net investment income are annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher. A zero balance may reflect an amount rounding to less than $0.01 or 0.01%. 

Net asset value,

beginning of

period

Net

investment

income

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class A

Six Months Ended 8/31/2026 (Unaudited)

$15.51

0.07

0.82

0.89

(0.02

)

(0.67

)

(0.69

)

Year Ended 2/28/2026

$14.52

0.15

2.13

2.28

(0.16

)

(1.13

)

(1.29

)

Year Ended 2/28/2025

$14.86

0.16

1.11

1.27

(0.18

)

(1.43

)

(1.61

)

Year Ended 2/29/2024

$14.29

0.17

1.49

1.66

(0.16

)

(0.93

)

(1.09

)

Year Ended 2/28/2023

$16.13

0.16

(0.50

)

(0.34

)

(0.16

)

(1.34

)

(1.50

)

Year Ended 2/28/2022

$17.72

0.14

(f)

1.30

1.44

(0.13

)

(2.90

)

(3.03

)

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$15.37

0.09

0.81

0.90

(0.03

)

(0.67

)

(0.70

)

Year Ended 2/28/2026

$14.40

0.19

2.11

2.30

(0.20

)

(1.13

)

(1.33

)

Year Ended 2/28/2025

$14.75

0.19

1.11

1.30

(0.22

)

(1.43

)

(1.65

)

Year Ended 2/29/2024

$14.19

0.20

1.49

1.69

(0.20

)

(0.93

)

(1.13

)

Year Ended 2/28/2023

$16.03

0.19

(0.49

)

(0.30

)

(0.20

)

(1.34

)

(1.54

)

Year Ended 2/28/2022

$17.63

0.19

(f)

1.29

1.48

(0.18

)

(2.90

)

(3.08

)

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$16.06

0.10

0.84

0.94

(0.03

)

(0.67

)

(0.70

)

Year Ended 2/28/2026

$14.98

0.19

2.22

2.41

(0.20

)

(1.13

)

(1.33

)

Year Ended 2/28/2025

$15.29

0.20

1.14

1.34

(0.22

)

(1.43

)

(1.65

)

Year Ended 2/29/2024

$14.67

0.21

1.54

1.75

(0.20

)

(0.93

)

(1.13

)

Year Ended 2/28/2023

$16.52

0.20

(0.51

)

(0.31

)

(0.20

)

(1.34

)

(1.54

)

Year Ended 2/28/2022

$18.08

0.19

(f)

1.33

1.52

(0.18

)

(2.90

)

(3.08

)

The accompanying Notes to Financial Statements are an integral part of this statement.

16

Columbia Mid Cap Index Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class A

Six Months Ended 8/31/2026 (Unaudited)

$15.71

5.70%

0.59%

(c)

0.45%

(c)

0.92%

9%

$476,913

Year Ended 2/28/2026

$15.51

16.71%

0.59%

(c)

0.45%

(c),(d)

1.05%

16%

$512,030

Year Ended 2/28/2025

$14.52

8.23%

0.58%

(c),(e)

0.45%

(c),(d),(e)

1.04%

16%

$557,409

Year Ended 2/29/2024

$14.86

12.58%

0.59%

(c)

0.45%

(c),(d)

1.19%

19%

$617,822

Year Ended 2/28/2023

$14.29

(1.05%

)

0.58%

(c),(e)

0.45%

(c),(d),(e)

1.10%

12%

$653,592

Year Ended 2/28/2022

$16.13

7.48%

0.58%

(c),(e)

0.45%

(c),(d),(e)

0.78%

16%

$768,487

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$15.57

5.79%

0.34%

(c)

0.20%

(c)

1.17%

9%

$1,140,035

Year Ended 2/28/2026

$15.37

17.00%

0.34%

(c)

0.20%

(c),(d)

1.30%

16%

$1,182,301

Year Ended 2/28/2025

$14.40

8.48%

0.33%

(c),(e)

0.20%

(c),(d),(e)

1.28%

16%

$1,077,209

Year Ended 2/29/2024

$14.75

12.88%

0.34%

(c)

0.20%

(c),(d)

1.45%

19%

$1,054,017

Year Ended 2/28/2023

$14.19

(0.80%

)

0.33%

(c),(e)

0.20%

(c),(d),(e)

1.35%

12%

$1,017,847

Year Ended 2/28/2022

$16.03

7.72%

0.33%

(c),(e)

0.20%

(c),(d),(e)

1.03%

16%

$1,534,550

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$16.30

5.79%

0.28%

(c)

0.20%

(c)

1.17%

9%

$497,547

Year Ended 2/28/2026

$16.06

17.07%

0.27%

(c)

0.20%

(c)

1.30%

16%

$530,307

Year Ended 2/28/2025

$14.98

8.44%

0.28%

(c),(e)

0.20%

(c),(e)

1.29%

16%

$546,625

Year Ended 2/29/2024

$15.29

12.86%

0.28%

(c)

0.20%

(c)

1.44%

19%

$582,545

Year Ended 2/28/2023

$14.67

(0.84%

)

0.28%

(c),(e)

0.20%

(c),(e)

1.35%

12%

$560,860

Year Ended 2/28/2022

$16.52

7.75%

0.27%

(c),(e)

0.20%

(c),(e)

1.03%

16%

$634,732

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Mid Cap Index Fund  | 2026

17


Financial Highlights (continued)

Net asset value,

beginning of

period

Net

investment

income

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$14.79

0.09

0.78

0.87

(0.03

)

(0.67

)

(0.70

)

Year Ended 2/28/2026

$13.90

0.18

2.04

2.22

(0.20

)

(1.13

)

(1.33

)

Year Ended 2/28/2025

$14.29

0.19

1.07

1.26

(0.22

)

(1.43

)

(1.65

)

Year Ended 2/29/2024

$13.79

0.19

1.44

1.63

(0.20

)

(0.93

)

(1.13

)

Year Ended 2/28/2023

$15.63

0.18

(0.48

)

(0.30

)

(0.20

)

(1.34

)

(1.54

)

Year Ended 2/28/2022

$17.25

0.18

(f)

1.28

1.46

(0.18

)

(2.90

)

(3.08

)

Notes to Financial Highlights

(a)

In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.

(b)

Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.

(c)

Ratios include interest on collateral expense which is less than 0.01%.

(d)

The benefits derived from expense reductions had an impact of less than 0.01%.

(e)

Ratios include interfund lending expense which is less than 0.01%.

(f)

Net investment income per share includes special dividends. The per share effect of these dividends amounted to:

Year Ended

Class A

Institutional

Class

Institutional 2

Class

Institutional 3

Class

02/28/2022

$0.01

$0.01

$0.01

$0.01

The accompanying Notes to Financial Statements are an integral part of this statement.

18

Columbia Mid Cap Index Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$14.96

5.82%

0.22%

(c)

0.20%

(c)

1.17%

9%

$336,399

Year Ended 2/28/2026

$14.79

17.04%

0.22%

(c)

0.20%

(c)

1.30%

16%

$354,301

Year Ended 2/28/2025

$13.90

8.47%

0.22%

(c),(e)

0.20%

(c),(e)

1.29%

16%

$325,712

Year Ended 2/29/2024

$14.29

12.81%

0.22%

(c)

0.20%

(c)

1.44%

19%

$373,603

Year Ended 2/28/2023

$13.79

(0.82%

)

0.23%

(c),(e)

0.20%

(c),(e)

1.36%

12%

$350,859

Year Ended 2/28/2022

$15.63

7.78%

0.22%

(c),(e)

0.20%

(c),(e)

1.04%

16%

$69,950

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Mid Cap Index Fund  | 2026

19


Notes to Financial Statements

August 31, 2026 (Unaudited)

Note 1. Organization

Columbia Mid Cap Index Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

Fund shares

The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different net investment income distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.

As described in the Fund’s prospectus, Class A shares are offered to the general public for investment. Institutional Class, Institutional 2 Class and Institutional 3 Class shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.

Note 2. Summary of significant accounting policies

Basis of preparation

The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification (Topic 946), Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which require management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

Segment reporting

The intent of FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures is to enable investors to better understand an entity’s overall performance and to assess its potential future cash flows through improved segment disclosures. The chief operating decision maker (CODM) for the Fund is Columbia Management Investment Advisers, LLC through its Investment Oversight Committee and Global Executive Group, which are responsible for assessing performance and making decisions about resource allocation. The CODM has determined that the Fund has a single operating segment because the CODM monitors the operating results of the Fund as a whole and the Fund’s long-term strategic asset allocation is pre-determined in accordance with the terms of its prospectus, based on a defined investment strategy which is executed by the Fund’s portfolio managers as a team. The financial information provided to and reviewed by the CODM is consistent with that presented within the Fund’s financial statements.

Security valuation

Equity securities listed on an exchange are valued at the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. Securities with a closing price not readily available or not listed on any exchange are valued at the mean between the closing bid and ask prices. Listed preferred stocks convertible into common stocks are valued using an evaluated price from a pricing service.

20

Columbia Mid Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Foreign equity securities are valued based on the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy approved by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including relevant general and sector indices, currency fluctuations, depositary receipts, and futures, as applicable, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.

Investments in open-end investment companies (other than exchange-traded funds (ETFs)) are valued at the latest net asset value reported by those companies as of the valuation time. 

Futures and options on futures contracts are valued based upon the settlement price at the close of regular trading on their principal exchanges or, in the absence of a settlement price, at the mean of the latest quoted bid and ask prices.

Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.

The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.

GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.

Derivative instruments

The Fund invests in certain derivative instruments, as detailed below, in seeking to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional exposure of a financial instrument is the nominal or face amount that is used to calculate payments made on that instrument and/or changes in value for the instrument. The notional exposure is a hypothetical underlying quantity upon which payment obligations are computed. Notional exposures provide a gauge for how the Fund may behave given changes in the underlying rate, asset or reference instrument and individual markets. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.

A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally expected to be limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With

Columbia Mid Cap Index Fund  | 2026

21


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty provides some protection in the case of clearing member default. The clearinghouse stands between the buyer and the seller of the contract; therefore, the primary counterparty credit risk is the risk of failure of the clearinghouse. However, credit risk still exists in exchange-traded and centrally cleared derivatives with respect to any collateral that is held in a broker’s customer accounts. While clearing brokers are required to segregate customer margin from their own assets, in the event that a clearing broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the clearing broker for all its clients and such shortfall is not remedied by the central counterparty or otherwise, U.S. bankruptcy laws will typically allocate that shortfall on a pro rata basis across all the clearing broker’s customers (including the Fund) by account class, potentially resulting in losses to the Fund.

In connection with certain over-the-counter derivatives, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and forward foreign currency exchange contracts and contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instruments’ payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.

Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or central counterparty for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms for most over-the-counter derivatives are subject to regulatory requirements to exchange variation margin with trading counterparties and may have contract specific margin terms as well. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker or receive interest income on cash collateral pledged to the broker. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.

Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty.  The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement.  In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.

For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.

Futures contracts

Futures contracts are exchange-traded and represent commitments for the future purchase or sale of an asset at a specified price on a specified date. The Fund bought and sold futures contracts to manage its exposure to the securities markets or to movements in interest rates and currency values. A Fund invests in futures contracts as part of its primary investment strategy and/or to equitize its cash flows. Investments in futures contracts may increase or decrease exposure to a particular market. These instruments may be used for other purposes in future periods. Upon entering into futures

22

Columbia Mid Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

contracts, the Fund bears risks that it may not achieve the anticipated benefits of the futures contracts and may realize a loss. Additional risks include counterparty credit risk, the possibility of an illiquid market, and that a change in the value of the contract or option may not correlate with changes in the value of the underlying asset.

Upon entering into a futures contract, the Fund deposits cash or securities with the broker, known as a futures commission merchant (FCM), in an amount sufficient to meet the initial margin requirement. The initial margin deposit must be maintained at an established level over the life of the contract. Cash deposited as initial margin is recorded in the Statement of Assets and Liabilities as margin deposits. Securities deposited as initial margin are designated in the Portfolio of Investments. Subsequent payments (variation margin) are made or received by the Fund each day. The variation margin payments are equal to the daily change in the contract value and are recorded as variation margin receivable or payable and are offset in unrealized gains or losses. The Fund generally expects to earn interest income on its margin deposits. The Fund recognizes a realized gain or loss when the contract is closed or expires. Futures contracts involve, to varying degrees, risk of loss in excess of the variation margin disclosed in the Statement of Assets and Liabilities.

Effects of derivative transactions in the financial statements

The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.

The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at August 31, 2026: 

Liability derivatives

Risk exposure

category

Statement

of assets and liabilities

location

Fair value ($)

Equity risk

Component of total distributable earnings (loss) — unrealized depreciation on futures contracts

268,346

*

*

Includes cumulative appreciation (depreciation) as reported in the tables following the Portfolio of Investments. Only the current day’s variation margin for futures and centrally cleared swaps, if any, is reported in receivables or payables in the Statement of Assets and Liabilities.

The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the six months ended August 31, 2026: 

Amount of realized gain (loss) on derivatives recognized in income

Risk exposure category

Futures

contracts

($)

Equity risk

4,630,192

Change in unrealized appreciation (depreciation) on derivatives recognized in income

Risk exposure category

Futures

contracts

($)

Equity risk

(1,558,375

)

The following table is a summary of the average daily outstanding volume by derivative instrument for the six months ended August 31, 2026: 

Derivative instrument

Average notional

amounts ($)

Futures contracts — long

34,894,822

Columbia Mid Cap Index Fund  | 2026

23


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Security transactions

Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.

Income recognition

Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of an ex-dividend notification in the case of certain foreign securities.

The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.

Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.

Expenses

General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.

Determination of class net asset value

All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.

Federal income tax status

The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.

Foreign taxes

The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability in the Statement of Assets and Liabilities.

24

Columbia Mid Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Distributions to shareholders

Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.

Guarantees and indemnifications

Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.

Note 3. Fees and other transactions with affiliates

Management services fees

The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice and is responsible for administrative and accounting services. The management services fee is an annual fee that is equal to 0.20% of the Fund’s daily net assets.

Compensation of Board members

Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund. The expense for the Deferred Plan, which includes Trustees’ fees deferred during the current period as well as any gains or losses on the Trustees’ deferred compensation balances as a result of market fluctuations, is included in "Deferred compensation of board members" in the Statement of Operations.

Compensation of Chief Compliance Officer

The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.

Transfer agency fees

Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with SS&C GIDS, Inc. (SS&C GIDS) to serve as sub-transfer agent. The Transfer Agent pays the fees of SS&C GIDS for services as sub-transfer agent and SS&C GIDS is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).

The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.

Columbia Mid Cap Index Fund  | 2026

25


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.

For the six months ended August 31, 2026, the Fund’s annualized effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows: 

Effective rate (%)

Class A

0.12

Institutional Class

0.12

Institutional 2 Class

0.06

Institutional 3 Class

0.00

An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the six months ended August 31, 2026, no minimum account balance fees were charged by the Fund.

Distribution and service fees

The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, a distribution and shareholder service plan (the Plan) applicable to Class A shares, which sets the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.

Under the Plan, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund.

Expenses waived/reimbursed by the Investment Manager and its affiliates

The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the classes’ average daily net assets: 

Fee rate(s) contractual

through

June 30, 2027 (%)

Class A

0.45

Institutional Class

0.20

Institutional 2 Class

0.20

Institutional 3 Class

0.20

Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, costs associated with shareholder meetings, infrequent and/or unusual expenses and any other expenses the exclusion of which is

26

Columbia Mid Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.

Note 4. Federal tax information

The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.

At August 31, 2026, the approximate cost of all investments for federal income tax purposes and the aggregate gross approximate unrealized appreciation and depreciation based on that cost was: 

Federal

tax cost ($)

Gross unrealized

appreciation ($)

Gross unrealized

(depreciation) ($)

Net unrealized

appreciation ($)

1,491,743,000

1,068,632,000

(110,149,000

)

958,483,000

Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.

Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.

Note 5. Portfolio information

The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $212,192,941 and $457,758,713, respectively, for the six months ended August 31, 2026. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.

Note 6. Affiliated money market fund

The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. The Securities and Exchange Commission has adopted amendments to money market fund rules requiring institutional prime money market funds like the Affiliated MMF to be subject to a discretionary liquidity fee of up to 2% if the imposition of such a fee is determined to be in the best interest of the Affiliated MMF and to a mandatory liquidity fee if daily net redemptions exceed 5% of net assets.

Note 7. Interfund lending

Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.

Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.

The Fund did not borrow or lend money under the Interfund Program during the six months ended August 31, 2026.

Columbia Mid Cap Index Fund  | 2026

27


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Note 8. Line of credit

Effective October 22, 2026, the Fund has access to a revolving credit facility with a syndicate of banks led by State Street Bank and Trust Company, Citibank, N.A. and Wells Fargo Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is an agreement between the Fund and certain other funds managed by the Investment Manager, severally and not jointly, permits aggregate borrowings up to $750 million. Interest is currently charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate and (ii) the overnight bank funding rate, plus 1.00% in each case. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in October unless extended or renewed. Prior to October 22, 2026, the Fund had access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A., which permitted aggregate borrowings up to $750 million. Interest was charged to each participating fund based on its borrowings at a rate equal to the highest of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case.

The Fund had no borrowings during the six months ended August 31, 2026.

Note 9. Risks and uncertainties

An investment in the Fund involves risks, including market risk and concentration risk, among others. The value of the Fund’s holdings and the Fund’s net asset value may go down. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally.

Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, other conflicts, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.

To the extent that the Fund concentrates its investment in particular issuers, countries, geographic regions, industries or sectors, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of issuers, countries, geographic regions, industries, sectors or investments.

Additional risk factors of the Fund are described more fully in the Fund’s Prospectus and Statement of Additional Information.

Shareholder concentration risk

At August 31, 2026, one unaffiliated shareholder of record owned 22.0% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Affiliated shareholders of record owned 24.7% of the outstanding shares of the Fund in one or more accounts. Fund shares sold to or redeemed by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.

Note 10. Subsequent events

Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.

28

Columbia Mid Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Note 11. Information regarding pending and settled legal proceedings

Ameriprise Financial and certain of its affiliates are involved, in the normal course of business, in legal proceedings that include regulatory inquiries, arbitration and litigation (including class actions) concerning matters arising in connection with the conduct of their activities as part of a diversified financial services firm. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.

There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, it is inherently difficult to determine whether any loss is probable or even reasonably possible, or to reasonably estimate the amount of any loss that may result from such matters. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief, and may lead to further claims, examinations, adverse publicity or reputational damage, each of which could have a material adverse effect on the consolidated financial condition or results of operations or financial condition of Ameriprise Financial or one or more of its affiliates that provide services to the Fund.

Columbia Mid Cap Index Fund  | 2026

29


 Approval of Management Agreement

(Unaudited)

Columbia Management Investment Advisers, LLC (the Investment Manager, and together with its domestic and global affiliates, Columbia Threadneedle Investments), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial), serves as the investment manager to Columbia Mid Cap Index Fund (the Fund). Under a management agreement (the Management Agreement), the Investment Manager provides investment advice and other services to the Fund.  The Investment Manager also provides investment advice and other services to other funds in the Columbia Fund family (collectively, the Funds).

On an annual basis, the Fund’s Board of Trustees (the Board), including the independent Board members (the Independent Trustees), considers renewal of the Management Agreement.  The Investment Manager prepared detailed reports for the Board and its Contracts Committee (including its Contracts Subcommittee) in March, April and June 2026, including reports providing the results of analyses performed by a third-party data provider, Broadridge Financial Solutions, Inc. (Broadridge), and comprehensive responses by the Investment Manager to written requests for information by independent legal counsel to the Independent Trustees (Independent Legal Counsel), to assist the Board in making this determination.  In addition, throughout the year, the Board (or its committees or subcommittees) regularly meets with portfolio management teams and senior management personnel and reviews information prepared by the Investment Manager addressing the services the Investment Manager provides and Fund performance.  The Board also accords appropriate weight to the work, deliberations and conclusions of the various committees (including their subcommittees), such as the Contracts Committee, the Investment Review Committee, the Audit Committee and the Compliance Committee, in determining whether to continue the Management Agreement.

The Board, at its June 18, 2026 Board meeting (the June Meeting), considered the renewal of the Management Agreement for an additional one-year term.  At the June Meeting, Independent Legal Counsel reviewed with the Independent Trustees various factors relevant to the Board’s consideration of advisory agreements and the Board’s legal responsibilities related to such consideration.  The Independent Trustees considered such information as they, their legal counsel or the Investment Manager believed reasonably necessary to evaluate and to approve the continuation of the Management Agreement. Among other things, the information and factors considered included the following:

•

Information on the investment performance of the Fund relative to the performance of a group of mutual funds determined to be comparable to the Fund by Broadridge, as well as performance relative to one or more benchmarks;

•

Information on the Fund’s management fees and total expenses, including information comparing the Fund’s expenses to those of a group of comparable mutual funds, as determined by Broadridge;

•

The Investment Manager’s agreement to contractually limit or cap total operating expenses for the Fund so that total operating expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses and infrequent and/or unusual expenses) would not exceed a specified annual rate, as a percentage of the Fund’s net assets;

•

Terms of the Management Agreement;

•

Descriptions of other agreements and arrangements with affiliates of the Investment Manager relating to the operations of the Fund, including agreements with respect to the provision of transfer agency and shareholder services to the Fund;

•

Descriptions of various services performed by the Investment Manager under the Management Agreement, including portfolio management and portfolio trading practices;

•

Information regarding any recently negotiated management fees of similarly-managed portfolios of other institutional clients of the Investment Manager;

•

Information regarding the resources of the Investment Manager, including information regarding senior management, portfolio managers and other personnel;

•

Information regarding the capabilities of the Investment Manager with respect to compliance monitoring services;

•

The profitability to the Investment Manager and its affiliates from their relationships with the Fund; and

30

Columbia Mid Cap Index Fund  | 2026


Approval of Management Agreement (continued)

(Unaudited)

•

Report provided by the Board’s independent fee consultant, JDL Consultants, LLC (JDL).

Following an analysis and discussion of the foregoing, and the factors identified below, the Board, including all of the Independent Trustees, approved the renewal of the Management Agreement.

Nature, extent and quality of services provided by the Investment Manager

The Board analyzed various reports and presentations it had received detailing the services performed by the Investment Manager, as well as its history, expertise, resources and relative capabilities, and the qualifications of its personnel.

The Board specifically considered the many developments during recent years concerning the services provided by the Investment Manager. Among other things, the Board noted the organization and depth of the equity and credit research departments. The Board further observed the enhancements to the investment risk management department’s processes, systems and oversight over the past several years.  The Board also took into account the broad scope of services provided by the Investment Manager to the Fund, including, among other services, investment, risk and compliance oversight.  The Board also took into account the information it received concerning the Investment Manager’s ability to attract and retain key portfolio management personnel and that it has sufficient resources to provide competitive and adequate compensation to investment personnel.

In connection with the Board’s evaluation of the overall package of services provided by the Investment Manager, the Board also considered the nature, quality and range of administrative services provided to the Fund by the Investment Manager, as well as the achievements in 2025 in the performance of administrative services, and noted the various enhancements anticipated for 2026.  In evaluating the quality of services provided under the Management Agreement, the Board also took into account the organization and strength of the Fund’s and its service providers’ compliance programs.  The Board also reviewed the financial condition of the Investment Manager and its affiliates and each entity’s ability to carry out its responsibilities under the Management Agreement and the Fund’s other service agreements.

In addition, the Board discussed the acceptability of the terms of the Management Agreement, noting that no changes were proposed from the form of agreement previously approved.  The Board also noted the wide array of legal and compliance services provided to the Fund under the Management Agreement.

After reviewing these and related factors (including investment performance as discussed below), the Board concluded, within the context of its overall conclusions, that the nature, extent and quality of the services provided to the Fund under the Management Agreement supported the continuation of the Management Agreement.

Investment performance

The Board carefully reviewed the investment performance of the Fund, including detailed reports providing the results of analyses performed by each of the Investment Manager, Broadridge and JDL collectively showing, for various periods (including since manager inception): (i) the performance of the Fund, (ii) the Fund’s performance relative to peers and benchmarks, (iii) the net assets of the Fund, and (iv) index tracking error data of the Fund. The Board observed that the Fund’s tracking error versus its performance was within the range of management’s expectations.

The Board also reviewed a description of the third-party data provider’s methodology for identifying the Fund’s peer groups for purposes of performance and expense comparisons. 

The Board also considered the Investment Manager’s performance and reputation generally.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the performance of the Fund and the Investment Manager, in light of other considerations, supported the continuation of the Management Agreement.

Columbia Mid Cap Index Fund  | 2026

31


Approval of Management Agreement (continued)

(Unaudited)

Comparative fees, costs of services provided and the profits realized by the Investment Manager and its affiliates from their relationships with the Fund

The Board reviewed comparative fees and the costs of services provided under the Management Agreement.  The Board members considered detailed comparative information set forth in an annual report on fees and expenses, including, among other things, data (based on analyses conducted by Broadridge and JDL) showing a comparison of the Fund’s expenses with median expenses paid by funds in its comparative peer universe, as well as data showing the Fund’s contribution to the Investment Manager’s profitability.

The Board considered the reports of JDL, which assisted in the Board’s analysis of the Funds’ performance and expenses and the reasonableness of the Funds’ fee rates.  The Board accorded particular weight to the notion that a primary objective of the level of fees is to achieve a rational pricing model applied consistently across the various product lines in the Fund family, while assuring that the overall fees for each Fund (with certain exceptions) are generally in line with the current “pricing philosophy” such that Fund total expense ratios, in general, approximate or are lower than the median expense ratios of funds in the same Lipper comparison universe. The Board took into account that the Fund’s total expense ratio (after considering proposed expense caps/waivers) was  below the peer universe’s median expense ratio shown in the reports.

After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the levels of management fees and expenses of the Fund, in light of other considerations, supported the continuation of the Management Agreement.

The Board also considered the profitability of the Investment Manager and its affiliates in connection with the Investment Manager providing management services to the Fund.  With respect to the profitability of the Investment Manager and its affiliates, the Independent Trustees referred to information discussing the profitability to the Investment Manager and Ameriprise Financial from managing, operating and distributing the Funds.  The Board considered that the profitability generated by the Investment Manager in 2025 had increased slightly from 2024 levels due to a variety of factors, including the increased assets under management of the Funds.  It also took into account the indirect economic benefits flowing to the Investment Manager or its affiliates in connection with managing or distributing the Funds, such as the enhanced ability to offer various other financial products to Ameriprise Financial customers, soft dollar benefits and overall reputational advantages.  The Board noted that the fees paid by the Fund should permit the Investment Manager to offer competitive compensation to its personnel, make necessary investments in its business and earn an appropriate profit.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the costs of services provided and the profitability to the Investment Manager and its affiliates from their relationships with the Fund supported the continuation of the Management Agreement.

Economies of scale

The Board considered the economies of scale that might be realized as the Fund’s net asset level grows and took note of the extent to which Fund shareholders might also benefit from such growth. The Board took into account, however, that the Management Agreement already provides for a relatively low flat fee regardless of the Fund’s asset level, and requires Columbia Threadneedle to provide investment advice, as well as administrative, accounting and other services to the Fund.

Conclusion

The Board reviewed all of the above considerations in reaching its decision to approve the continuation of the Management Agreement.  In reaching its conclusions, no single factor was determinative. 

On June 18, 2026, the Board, including all of the Independent Trustees, determined that fees payable under the Management Agreement were fair and reasonable in light of the extent and quality of services provided and approved the renewal of the Management Agreement.

32

Columbia Mid Cap Index Fund  | 2026


[THIS PAGE INTENTIONALLY LEFT BLANK]


[THIS PAGE INTENTIONALLY LEFT BLANK]


[THIS PAGE INTENTIONALLY LEFT BLANK]


Columbia Mid Cap Index Fund

P.O. Box 219104

Kansas City, MO 64121-9104

  

Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.

Columbia Threadneedle Investments® (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.

© 2026 Columbia Management Investment Advisers, LLC.

columbiathreadneedleus.com/investor/

SAR196_(10/26)



  

Columbia Select Mid Cap Value Fund

Semi-Annual Financial Statements and Additional Information

August 31, 2026 (Unaudited)

Not FDIC or NCUA Insured

No Financial Institution Guarantee

May Lose Value


Table of Contents

Portfolio of Investments

3

Statement of Assets and Liabilities

7

Statement of Operations

9

Statement of Changes in Net Assets

10

Financial Highlights

12

Notes to Financial Statements

16

Approval of Management Agreement

24

Columbia Select Mid Cap Value Fund | 2026


Portfolio of Investments

August 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

Investments in securities

Common Stocks 97.1%

Issuer

Shares

Value ($)

Communication Services 3.7%

Entertainment 1.6%

Take-Two Interactive Software, Inc.(a)

243,216

53,434,555

Media 2.1%

Nexstar Media Group, Inc., Class A

388,126

70,689,389

Total Communication Services

124,123,944

Consumer Discretionary 8.4%

Hotels, Restaurants & Leisure 1.9%

Hyatt Hotels Corp., Class A

383,653

64,058,541

Household Durables 1.9%

D.R. Horton, Inc.

440,519

63,681,427

Leisure Products 2.0%

Hasbro, Inc.

716,183

67,392,820

Specialty Retail 2.6%

Burlington Stores, Inc.(a)

132,971

34,540,547

O’Reilly Automotive, Inc.(a)

592,170

52,584,696

Total

87,125,243

Total Consumer Discretionary

282,258,031

Consumer Staples 5.7%

Consumer Staples Distribution & Retail 3.6%

Dollar Tree, Inc.(a)

329,491

41,710,266

U.S. Foods Holding Corp.(a)

753,010

78,945,568

Total

120,655,834

Food Products 2.1%

Tyson Foods, Inc., Class A

1,265,090

69,757,063

Total Consumer Staples

190,412,897

Energy 6.9%

Oil, Gas & Consumable Fuels 6.9%

Devon Energy Corp.

1,893,038

91,831,274

Marathon Petroleum Corp.

374,744

139,899,430

Total

231,730,704

Total Energy

231,730,704

Common Stocks (continued)

Issuer

Shares

Value ($)

Financials 17.5%

Banks 4.8%

Popular, Inc.

510,826

85,915,825

Regions Financial Corp.

2,457,376

73,426,395

Total

159,342,220

Capital Markets 2.0%

Carlyle Group, Inc. (The)

1,381,769

66,863,802

Consumer Finance 2.3%

Capital One Financial Corp.

363,407

77,954,436

Financial Services 4.1%

Global Payments, Inc.

612,268

55,747,001

Voya Financial, Inc.

810,599

82,129,891

Total

137,876,892

Insurance 4.3%

Hanover Insurance Group, Inc. (The)

291,697

65,955,609

Kemper Corp.

619,937

17,469,824

Reinsurance Group of America, Inc.

241,121

59,325,411

Total

142,750,844

Total Financials

584,788,194

Health Care 9.2%

Health Care Equipment & Supplies 2.0%

Zimmer Biomet Holdings, Inc.

657,850

65,811,314

Health Care Providers & Services 5.3%

Centene Corp.(a)

619,923

39,885,846

Humana, Inc.

144,988

55,563,751

Quest Diagnostics, Inc.

336,547

80,872,244

Total

176,321,841

Life Sciences Tools & Services 1.9%

Agilent Technologies, Inc.

418,286

64,231,998

Total Health Care

306,365,153

Industrials 14.9%

Aerospace & Defense 1.6%

ATI, Inc.(a)

268,716

54,871,807

Building Products 1.7%

Trane Technologies PLC

126,506

56,219,266

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund  | 2026

3


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Electrical Equipment 2.5%

AMETEK, Inc.

356,350

83,802,830

Machinery 4.8%

Ingersoll Rand, Inc.

1,004,981

77,433,786

ITT, Inc.

419,995

84,120,799

Total

161,554,585

Passenger Airlines 2.0%

Southwest Airlines Co.

1,728,933

66,615,788

Professional Services 2.3%

CACI International, Inc., Class A(a)

123,821

77,141,721

Total Industrials

500,205,997

Information Technology 11.7%

Communications Equipment 2.3%

Motorola Solutions, Inc.

158,761

77,046,713

Electronic Equipment, Instruments & Components 2.6%

CDW Corp.

380,000

57,600,400

Corning, Inc.

187,423

27,875,423

Total

85,475,823

Semiconductors & Semiconductor Equipment 3.2%

ON Semiconductor Corp.(a)

935,166

69,286,449

Teradyne, Inc.

106,822

37,369,540

Total

106,655,989

Software 3.6%

Dynatrace, Inc.(a)

1,070,000

58,411,300

Tyler Technologies, Inc.(a)

170,000

63,277,400

Total

121,688,700

Total Information Technology

390,867,225

Materials 5.5%

Chemicals 1.1%

Chemours Co. (The)

2,281,585

35,501,463

Containers & Packaging 2.2%

Smurfit WestRock PLC

1,583,495

74,265,915

Common Stocks (continued)

Issuer

Shares

Value ($)

Metals & Mining 2.2%

Freeport-McMoRan, Inc.

967,849

73,304,883

Total Materials

183,072,261

Real Estate 7.4%

Health Care REITs 2.4%

Welltower, Inc.

332,913

78,647,367

Industrial REITs 1.8%

First Industrial Realty Trust, Inc.

998,456

61,784,457

Specialized REITs 3.2%

Gaming and Leisure Properties, Inc.

1,328,607

55,894,497

Lamar Advertising Co., Class A

340,884

50,795,125

Total

106,689,622

Total Real Estate

247,121,446

Utilities 6.2%

Electric Utilities 3.9%

Entergy Corp.

788,008

83,773,130

PG&E Corp.

3,441,213

45,664,897

Total

129,438,027

Multi-Utilities 2.3%

Ameren Corp.

744,840

78,960,488

Total Utilities

208,398,515

Total Common Stocks

(Cost $1,798,476,890)

3,249,344,367

Money Market Funds 2.7%

Shares

Value ($)

Columbia Short-Term Cash Fund, 3.871%(b),(c)

89,556,817

89,512,038

Total Money Market Funds

(Cost $89,509,703)

89,512,038

Total Investments in Securities

(Cost: $1,887,986,593)

3,338,856,405

Other Assets & Liabilities, Net

5,081,869

Net Assets

3,343,938,274

The accompanying Notes to Financial Statements are an integral part of this statement.

4

Columbia Select Mid Cap Value Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Notes to Portfolio of Investments 

(a)

Non-income producing investment.

(b)

The rate shown is the seven-day current annualized yield at August 31, 2026.

(c)

Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The values of the holdings and transactions in these affiliated companies during the period ended August 31, 2026 are as follows:

Affiliated issuers

Beginning

of period($)

Purchases($)

Sales($)

Net change in

unrealized

appreciation

(depreciation)($)

End of

period($)

Realized gain

(loss)($)

Dividends($)

End of

period shares

Columbia Short-Term Cash Fund, 3.871%

51,668,090

161,473,590

(123,621,886

)

(7,756

)

89,512,038

(7,838

)

1,306,900

89,556,817

Fair value measurements  

The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.

Fair value inputs are summarized in the three broad levels listed below:

■

 Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date.  Valuation adjustments are not applied to Level 1 investments.

■

 Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).

■

 Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).

Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by Columbia Management Investment Advisers, LLC (the Investment Manager), along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.

Investments falling into the Level 3 category, if any, are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.

The Fund’s Board of Trustees (the Board) has designated the Investment Manager, through its Valuation Committee (the Committee), as valuation designee, responsible for determining the fair value of the assets of the Fund for which market quotations are not readily available using valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.

The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third-party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third-party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. Representatives of the Investment Manager report to the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.

The following table is a summary of the inputs used to value the Fund’s investments at August 31, 2026: 

Level 1 ($)

Level 2 ($)

Level 3 ($)

Total ($)

Investments in Securities

Common Stocks

Communication Services

124,123,944

—

—

124,123,944

Consumer Discretionary

282,258,031

—

—

282,258,031

Consumer Staples

190,412,897

—

—

190,412,897

Energy

231,730,704

—

—

231,730,704

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund  | 2026

5


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Fair value measurements   (continued)

Level 1 ($)

Level 2 ($)

Level 3 ($)

Total ($)

Financials

584,788,194

—

—

584,788,194

Health Care

306,365,153

—

—

306,365,153

Industrials

500,205,997

—

—

500,205,997

Information Technology

390,867,225

—

—

390,867,225

Materials

183,072,261

—

—

183,072,261

Real Estate

247,121,446

—

—

247,121,446

Utilities

208,398,515

—

—

208,398,515

Total Common Stocks

3,249,344,367

—

—

3,249,344,367

Money Market Funds

89,512,038

—

—

89,512,038

Total Investments in Securities

3,338,856,405

—

—

3,338,856,405

See the Portfolio of Investments for all investment classifications not indicated in the table.

The accompanying Notes to Financial Statements are an integral part of this statement.

6

Columbia Select Mid Cap Value Fund  | 2026


Statement of Assets and Liabilities

August 31, 2026 (Unaudited)

Assets

Investments in securities, at value

Unaffiliated issuers (cost $1,798,476,890)

$3,249,344,367

Affiliated issuers (cost $89,509,703)

89,512,038

Receivable for:

Capital shares sold

4,594,154

Dividends

3,863,987

Foreign tax reclaims

179,054

Prepaid expenses

11,428

Other assets

15,079

Total assets

3,347,520,107

Liabilities

Payable for:

Capital shares redeemed

2,334,269

Management services fees

198,044

Distribution and/or service fees

27,401

Transfer agent fees

343,033

Compensation of chief compliance officer

233

Compensation of board members

3,859

Other expenses

61,607

Deferred compensation of board members

613,387

Total liabilities

3,581,833

Net assets applicable to outstanding capital stock

$3,343,938,274

Represented by

Paid in capital

1,633,424,898

Total distributable earnings (loss)

1,710,513,376

Total - representing net assets applicable to outstanding capital stock

$3,343,938,274

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund  | 2026

7


Statement of Assets and Liabilities (continued)

August 31, 2026 (Unaudited)

Class A

Net assets

$1,217,262,065

Shares outstanding

67,602,145

Net asset value per share

$18.01

Maximum sales charge

5.75%

Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares)

$19.11

Class C

Net assets

$8,758,639

Shares outstanding

572,702

Net asset value per share

$15.29

Institutional Class

Net assets

$1,142,002,896

Shares outstanding

63,112,271

Net asset value per share

$18.09

Institutional 2 Class

Net assets

$91,370,422

Shares outstanding

4,785,864

Net asset value per share

$19.09

Institutional 3 Class

Net assets

$686,562,508

Shares outstanding

38,174,847

Net asset value per share

$17.98

Class R

Net assets

$33,668,737

Shares outstanding

1,883,587

Net asset value per share

$17.87

Class S

Net assets

$164,313,007

Shares outstanding

9,078,264

Net asset value per share

$18.10

The accompanying Notes to Financial Statements are an integral part of this statement.

8

Columbia Select Mid Cap Value Fund  | 2026


Statement of Operations

Six Months Ended August 31, 2026 (Unaudited)

Net investment income

Income:

Dividends — unaffiliated issuers

$23,499,339

Dividends — affiliated issuers

1,306,900

Interfund lending

104

Foreign taxes withheld

(95,780

)

Total income

24,710,563

Expenses:

Management services fees

11,229,442

Distribution and/or service fees

Class A

1,463,635

Class C

41,635

Class R

78,757

Transfer agent fees

Class A

700,590

Class C

4,983

Institutional Class

625,118

Institutional 2 Class

25,390

Institutional 3 Class

11,990

Class R

18,854

Class S

95,760

Custodian fees

7,116

Printing and postage fees

63,600

Registration fees

48,477

Accounting services fees

16,880

Legal fees

26,619

Compensation of chief compliance officer

235

Compensation of board members

19,052

Deferred compensation of board members

72,192

Other

28,209

Total expenses

14,578,534

Net investment income

10,132,029

Realized and unrealized gain (loss) — net

Net realized gain (loss) on:

Investments — unaffiliated issuers

291,110,391

Investments — affiliated issuers

(7,838

)

Net realized gain

291,102,553

Net change in unrealized appreciation (depreciation) on:

Investments — unaffiliated issuers

41,220,371

Investments — affiliated issuers

(7,756

)

Net change in unrealized appreciation (depreciation)

41,212,615

Net realized and unrealized gain

332,315,168

Net increase in net assets resulting from operations

$342,447,197

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund  | 2026

9


Statement of Changes in Net Assets

Six Months Ended

August 31, 2026

(Unaudited)

Year Ended

February 28, 2026

Operations

Net investment income

$10,132,029

$20,866,438

Net realized gain

291,102,553

168,683,102

Net change in unrealized appreciation (depreciation)

41,212,615

449,119,045

Net increase in net assets resulting from operations

342,447,197

638,668,585

Distributions to shareholders

Net investment income and net realized gains

Class A

(26,618,460

)

(64,705,337

)

Class C

(193,982

)

(478,261

)

Institutional Class

(25,256,996

)

(53,619,440

)

Institutional 2 Class

(2,323,716

)

(4,745,737

)

Institutional 3 Class

(15,351,158

)

(31,053,032

)

Class R

(690,241

)

(1,598,810

)

Class S

(3,821,247

)

(9,247,438

)

Total distributions to shareholders

(74,255,800

)

(165,448,055

)

Increase (decrease) in net assets from capital stock activity

171,550,473

(41,397,673

)

Total increase in net assets

439,741,870

431,822,857

Net assets at beginning of period

2,904,196,404

2,472,373,547

Net assets at end of period

$3,343,938,274

$2,904,196,404

The accompanying Notes to Financial Statements are an integral part of this statement.

10

Columbia Select Mid Cap Value Fund  | 2026


Statement of Changes in Net Assets  (continued)

Six Months Ended

Year Ended

August 31, 2026 (Unaudited)

February 28, 2026

Shares

Dollars ($)

Shares

Dollars ($)

Capital stock activity

Class A

Shares sold

2,041,534

34,991,712

2,167,333

31,071,732

Distributions reinvested

1,473,302

25,278,310

4,366,940

61,459,995

Shares redeemed

(4,402,764

)

(74,884,504

)

(10,115,156

)

(144,328,377

)

Net decrease

(887,928

)

(14,614,482

)

(3,580,883

)

(51,796,650

)

Class C

Shares sold

86,327

1,257,994

108,062

1,346,506

Distributions reinvested

12,867

188,891

38,468

464,674

Shares redeemed

(103,661

)

(1,489,542

)

(176,940

)

(2,146,206

)

Net decrease

(4,467

)

(42,657

)

(30,410

)

(335,026

)

Institutional Class

Shares sold

11,225,878

189,504,852

7,168,565

105,938,362

Distributions reinvested

1,351,357

23,262,668

3,509,628

49,489,919

Shares redeemed

(4,833,331

)

(83,471,611

)

(17,207,399

)

(247,438,571

)

Net increase (decrease)

7,743,904

129,295,909

(6,529,206

)

(92,010,290

)

Institutional 2 Class

Shares sold

1,218,397

22,167,849

1,177,082

18,309,021

Distributions reinvested

114,206

2,071,591

284,607

4,236,700

Shares redeemed

(1,768,443

)

(32,764,483

)

(1,088,887

)

(16,251,528

)

Net increase (decrease)

(435,840

)

(8,525,043

)

372,802

6,294,193

Institutional 3 Class

Shares sold

6,836,812

118,049,602

14,443,541

209,800,995

Distributions reinvested

833,043

14,233,953

2,004,609

28,287,113

Shares redeemed

(3,783,966

)

(64,369,652

)

(9,167,299

)

(132,280,797

)

Net increase

3,885,889

67,913,903

7,280,851

105,807,311

Class R

Shares sold

220,802

3,776,355

445,676

6,216,593

Distributions reinvested

40,402

689,949

114,171

1,598,133

Shares redeemed

(195,386

)

(3,306,587

)

(502,633

)

(7,017,572

)

Net increase

65,818

1,159,717

57,214

797,154

Class S

Shares sold

232,612

3,898,144

289,355

4,249,723

Distributions reinvested

222,124

3,821,247

651,523

9,207,307

Shares redeemed

(656,907

)

(11,356,265

)

(1,648,125

)

(23,611,395

)

Net decrease

(202,171

)

(3,636,874

)

(707,247

)

(10,154,365

)

Total net increase (decrease)

10,165,205

171,550,473

(3,136,879

)

(41,397,673

)

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund  | 2026

11


Financial Highlights

The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The ratios of expenses and net investment income are annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher. A zero balance may reflect an amount rounding to less than $0.01 or 0.01%. 

Net asset value,

beginning of

period

Net

investment

income

(loss)

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class A

Six Months Ended 8/31/2026 (Unaudited)

$16.55

0.04

1.82

1.86

(0.05

)

(0.35

)

(0.40

)

Year Ended 2/28/2026

$13.84

0.10

3.56

3.66

(0.09

)

(0.86

)

(0.95

)

Year Ended 2/28/2025

$13.39

0.09

1.30

1.39

(0.11

)

(0.83

)

(0.94

)

Year Ended 2/29/2024

$12.47

0.11

0.97

1.08

(0.10

)

(0.06

)

(0.16

)

Year Ended 2/28/2023

$13.54

0.08

(0.42

)

(0.34

)

(0.07

)

(0.66

)

(0.73

)

Year Ended 2/28/2022

$12.50

0.05

2.22

2.27

(0.04

)

(1.19

)

(1.23

)

Class C

Six Months Ended 8/31/2026 (Unaudited)

$14.12

(0.02

)

1.54

1.52

—

(0.35

)

(0.35

)

Year Ended 2/28/2026

$11.94

(0.01

)

3.05

3.04

(0.00

)

(0.86

)

(0.86

)

Year Ended 2/28/2025

$11.66

(0.01

)

1.13

1.12

(0.01

)

(0.83

)

(0.84

)

Year Ended 2/29/2024

$10.88

0.02

0.83

0.85

(0.01

)

(0.06

)

(0.07

)

Year Ended 2/28/2023

$11.92

(0.01

)

(0.37

)

(0.38

)

—

(0.66

)

(0.66

)

Year Ended 2/28/2022

$11.18

(0.05

)

1.98

1.93

—

(1.19

)

(1.19

)

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$16.62

0.06

1.83

1.89

(0.07

)

(0.35

)

(0.42

)

Year Ended 2/28/2026

$13.90

0.13

3.57

3.70

(0.12

)

(0.86

)

(0.98

)

Year Ended 2/28/2025

$13.44

0.13

1.30

1.43

(0.14

)

(0.83

)

(0.97

)

Year Ended 2/29/2024

$12.53

0.14

0.96

1.10

(0.13

)

(0.06

)

(0.19

)

Year Ended 2/28/2023

$13.59

0.11

(0.41

)

(0.30

)

(0.10

)

(0.66

)

(0.76

)

Year Ended 2/28/2022

$12.55

0.08

2.22

2.30

(0.07

)

(1.19

)

(1.26

)

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$17.52

0.07

1.92

1.99

(0.07

)

(0.35

)

(0.42

)

Year Ended 2/28/2026

$14.60

0.15

3.76

3.91

(0.13

)

(0.86

)

(0.99

)

Year Ended 2/28/2025

$14.07

0.14

1.38

1.52

(0.16

)

(0.83

)

(0.99

)

Year Ended 2/29/2024

$13.11

0.16

1.00

1.16

(0.14

)

(0.06

)

(0.20

)

Year Ended 2/28/2023

$14.18

0.13

(0.42

)

(0.29

)

(0.12

)

(0.66

)

(0.78

)

Year Ended 2/28/2022

$13.05

0.10

2.31

2.41

(0.09

)

(1.19

)

(1.28

)

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$16.53

0.07

1.81

1.88

(0.08

)

(0.35

)

(0.43

)

Year Ended 2/28/2026

$13.83

0.15

3.55

3.70

(0.14

)

(0.86

)

(1.00

)

Year Ended 2/28/2025

$13.38

0.14

1.30

1.44

(0.16

)

(0.83

)

(0.99

)

Year Ended 2/29/2024

$12.46

0.16

0.97

1.13

(0.15

)

(0.06

)

(0.21

)

Year Ended 2/28/2023

$13.53

0.13

(0.42

)

(0.29

)

(0.12

)

(0.66

)

(0.78

)

Year Ended 2/28/2022

$12.50

0.10

2.21

2.31

(0.09

)

(1.19

)

(1.28

)

The accompanying Notes to Financial Statements are an integral part of this statement.

12

Columbia Select Mid Cap Value Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income (loss)

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class A

Six Months Ended 8/31/2026 (Unaudited)

$18.01

11.35%

1.11%

1.11%

0.48%

15%

$1,217,262

Year Ended 2/28/2026

$16.55

27.76%

1.13%

1.13%

(c)

0.68%

15%

$1,133,249

Year Ended 2/28/2025

$13.84

10.27%

1.13%

1.13%

(c)

0.64%

10%

$997,414

Year Ended 2/29/2024

$13.39

8.79%

1.15%

1.12%

(c)

0.91%

15%

$1,010,326

Year Ended 2/28/2023

$12.47

(1.90%

)

1.14%

1.12%

(c)

0.67%

30%

$1,038,459

Year Ended 2/28/2022

$13.54

18.15%

1.13%

1.13%

(c)

0.35%

37%

$1,142,075

Class C

Six Months Ended 8/31/2026 (Unaudited)

$15.29

10.87%

1.86%

1.86%

(0.27%

)

15%

$8,759

Year Ended 2/28/2026

$14.12

26.82%

1.88%

1.88%

(c)

(0.07%

)

15%

$8,147

Year Ended 2/28/2025

$11.94

9.44%

1.88%

1.87%

(c)

(0.11%

)

10%

$7,255

Year Ended 2/29/2024

$11.66

7.90%

1.90%

1.87%

(c)

0.15%

15%

$8,353

Year Ended 2/28/2023

$10.88

(2.56%

)

1.89%

1.87%

(c)

(0.07%

)

30%

$10,281

Year Ended 2/28/2022

$11.92

17.19%

1.88%

1.88%

(c)

(0.39%

)

37%

$12,830

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$18.09

11.49%

0.86%

0.86%

0.72%

15%

$1,142,003

Year Ended 2/28/2026

$16.62

28.02%

0.88%

0.88%

(c)

0.93%

15%

$920,487

Year Ended 2/28/2025

$13.90

10.58%

0.88%

0.88%

(c)

0.89%

10%

$860,455

Year Ended 2/29/2024

$13.44

8.95%

0.90%

0.87%

(c)

1.16%

15%

$843,358

Year Ended 2/28/2023

$12.53

(1.56%

)

0.89%

0.87%

(c)

0.92%

30%

$861,739

Year Ended 2/28/2022

$13.59

18.36%

0.89%

0.88%

(c)

0.60%

37%

$861,576

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$19.09

11.51%

0.79%

0.79%

0.81%

15%

$91,370

Year Ended 2/28/2026

$17.52

28.15%

0.81%

0.81%

1.00%

15%

$91,476

Year Ended 2/28/2025

$14.60

10.69%

0.81%

0.80%

0.96%

10%

$70,788

Year Ended 2/29/2024

$14.07

9.04%

0.81%

0.78%

1.23%

15%

$67,666

Year Ended 2/28/2023

$13.11

(1.47%

)

0.81%

0.77%

1.02%

30%

$123,621

Year Ended 2/28/2022

$14.18

18.47%

0.80%

0.78%

0.70%

37%

$130,351

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$17.98

11.50%

0.74%

0.74%

0.84%

15%

$686,563

Year Ended 2/28/2026

$16.53

28.19%

0.76%

0.76%

1.04%

15%

$566,647

Year Ended 2/28/2025

$13.83

10.71%

0.75%

0.75%

1.01%

10%

$373,399

Year Ended 2/29/2024

$13.38

9.24%

0.76%

0.73%

1.29%

15%

$361,466

Year Ended 2/28/2023

$12.46

(1.50%

)

0.75%

0.73%

1.05%

30%

$411,996

Year Ended 2/28/2022

$13.53

18.53%

0.75%

0.74%

0.73%

37%

$434,024

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund  | 2026

13


Financial Highlights (continued)

Net asset value,

beginning of

period

Net

investment

income

(loss)

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class R

Six Months Ended 8/31/2026 (Unaudited)

$16.43

0.02

1.80

1.82

(0.03

)

(0.35

)

(0.38

)

Year Ended 2/28/2026

$13.75

0.06

3.53

3.59

(0.05

)

(0.86

)

(0.91

)

Year Ended 2/28/2025

$13.30

0.05

1.30

1.35

(0.07

)

(0.83

)

(0.90

)

Year Ended 2/29/2024

$12.40

0.08

0.95

1.03

(0.07

)

(0.06

)

(0.13

)

Year Ended 2/28/2023

$13.46

0.05

(0.41

)

(0.36

)

(0.04

)

(0.66

)

(0.70

)

Year Ended 2/28/2022

$12.44

0.01

2.21

2.22

(0.01

)

(1.19

)

(1.20

)

Class S

Six Months Ended 8/31/2026 (Unaudited)

$16.63

0.06

1.83

1.89

(0.07

)

(0.35

)

(0.42

)

Year Ended 2/28/2026

$13.90

0.13

3.58

3.71

(0.12

)

(0.86

)

(0.98

)

Year Ended 2/28/2025(d)

$14.77

0.04

(0.21

)(e)

(0.17

)

(0.03

)

(0.67

)

(0.70

)

Notes to Financial Highlights

(a)

In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.

(b)

Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.

(c)

The benefits derived from expense reductions had an impact of less than 0.01%.

(d)

Class S shares commenced operations on October 2, 2024. Per share data and total return reflect activity from that date.

(e)

Calculation of the net gain (loss) per share (both realized and unrealized) does not correlate to the aggregate realized and unrealized gain (loss) presented in the Statement of Operations due to timing of Fund shares sold and redeemed in relation to fluctuations in the market value of the portfolio. For a new share class, the difference may be due to the timing of the commencement of operations for the share class.

The accompanying Notes to Financial Statements are an integral part of this statement.

14

Columbia Select Mid Cap Value Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income (loss)

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class R

Six Months Ended 8/31/2026 (Unaudited)

$17.87

11.17%

1.36%

1.36%

0.23%

15%

$33,669

Year Ended 2/28/2026

$16.43

27.40%

1.38%

1.38%

(c)

0.42%

15%

$29,864

Year Ended 2/28/2025

$13.75

10.06%

1.38%

1.38%

(c)

0.39%

10%

$24,201

Year Ended 2/29/2024

$13.30

8.40%

1.40%

1.37%

(c)

0.66%

15%

$22,727

Year Ended 2/28/2023

$12.40

(2.09%

)

1.39%

1.37%

(c)

0.42%

30%

$25,136

Year Ended 2/28/2022

$13.46

17.79%

1.38%

1.38%

(c)

0.10%

37%

$27,787

Class S

Six Months Ended 8/31/2026 (Unaudited)

$18.10

11.49%

0.86%

0.86%

0.72%

15%

$164,313

Year Ended 2/28/2026

$16.63

28.09%

0.88%

0.88%

(c)

0.93%

15%

$154,326

Year Ended 2/28/2025

(d)

$13.90

(1.34%

)

0.90%

0.90%

0.75%

10%

$138,861

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Select Mid Cap Value Fund  | 2026

15


Notes to Financial Statements

August 31, 2026 (Unaudited)

Note 1. Organization

Columbia Select Mid Cap Value Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

Fund shares

The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different net investment income distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.

As described in the Fund’s prospectus, Class A and Class C shares are offered to the general public for investment. Class C shares automatically convert to Class A shares after 8 years. Institutional Class, Institutional 2 Class, Institutional 3 Class, Class R and Class S shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.

Note 2. Summary of significant accounting policies

Basis of preparation

The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification (Topic 946), Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which require management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

Segment reporting

The intent of FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures is to enable investors to better understand an entity’s overall performance and to assess its potential future cash flows through improved segment disclosures. The chief operating decision maker (CODM) for the Fund is Columbia Management Investment Advisers, LLC through its Investment Oversight Committee and Global Executive Group, which are responsible for assessing performance and making decisions about resource allocation. The CODM has determined that the Fund has a single operating segment because the CODM monitors the operating results of the Fund as a whole and the Fund’s long-term strategic asset allocation is pre-determined in accordance with the terms of its prospectus, based on a defined investment strategy which is executed by the Fund’s portfolio managers as a team. The financial information provided to and reviewed by the CODM is consistent with that presented within the Fund’s financial statements.

Security valuation

Equity securities listed on an exchange are valued at the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. Securities with a closing price not readily available or not listed on any exchange are valued at the mean between the closing bid and ask prices. Listed preferred stocks convertible into common stocks are valued using an evaluated price from a pricing service.

16

Columbia Select Mid Cap Value Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Foreign equity securities are valued based on the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy approved by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including relevant general and sector indices, currency fluctuations, depositary receipts, and futures, as applicable, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.

Investments in open-end investment companies (other than exchange-traded funds (ETFs)) are valued at the latest net asset value reported by those companies as of the valuation time. 

Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.

The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.

GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.

Security transactions

Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.

Income recognition

Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of an ex-dividend notification in the case of certain foreign securities.

The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.

Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.

Columbia Select Mid Cap Value Fund  | 2026

17


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Expenses

General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.

Determination of class net asset value

All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.

Federal income tax status

The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.

Foreign taxes

The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability in the Statement of Assets and Liabilities.

Distributions to shareholders

Distributions from net investment income, if any, are declared and paid each calendar quarter. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.

Guarantees and indemnifications

Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.

Note 3. Fees and other transactions with affiliates

Management services fees

The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice and is responsible for administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.82% to 0.65% as the Fund’s net assets increase. The annualized effective management services fee rate for the six months ended August 31, 2026 was 0.72% of the Fund’s average daily net assets.

18

Columbia Select Mid Cap Value Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Compensation of Board members

Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund. The expense for the Deferred Plan, which includes Trustees’ fees deferred during the current period as well as any gains or losses on the Trustees’ deferred compensation balances as a result of market fluctuations, is included in "Deferred compensation of board members" in the Statement of Operations.

Compensation of Chief Compliance Officer

The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.

Transfer agency fees

Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with SS&C GIDS, Inc. (SS&C GIDS) to serve as sub-transfer agent. The Transfer Agent pays the fees of SS&C GIDS for services as sub-transfer agent and SS&C GIDS is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).

The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.

The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.

For the six months ended August 31, 2026, the Fund’s annualized effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows: 

Effective rate (%)

Class A

0.12

Class C

0.12

Institutional Class

0.12

Institutional 2 Class

0.05

Institutional 3 Class

0.00

Class R

0.12

Class S

0.12

An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the six months ended August 31, 2026, no minimum account balance fees were charged by the Fund.

Columbia Select Mid Cap Value Fund  | 2026

19


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Distribution and service fees

The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.

Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class C shares of the Fund and a monthly distribution fee to the Distributor at the maximum annual rates of 0.75% and 0.50% of the average daily net assets attributable to Class C and Class R shares of the Fund, respectively.

Sales charges

Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the six months ended August 31, 2026, if any, are listed below: 

Front End (%)

CDSC (%)

Amount ($)

Class A

5.75

0.50 - 1.00

(a)

119,274

Class C

—

1.00

(b)

63

(a)

This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.

(b)

This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.

The Fund’s other share classes are not subject to sales charges.

Expenses waived/reimbursed by the Investment Manager and its affiliates

The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the classes’ average daily net assets: 

July 1, 2026

through

June 30, 2027 (%)

Prior to

July 1, 2026 (%)

Class A

1.14

1.16

Class C

1.89

1.91

Institutional Class

0.89

0.91

Institutional 2 Class

0.82

0.84

Institutional 3 Class

0.77

0.79

Class R

1.39

1.41

Class S

0.89

0.91

Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, costs associated with shareholder meetings, infrequent and/or unusual expenses and any other expenses the exclusion of which is

20

Columbia Select Mid Cap Value Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.

Note 4. Federal tax information

The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.

At August 31, 2026, the approximate cost of all investments for federal income tax purposes and the aggregate gross approximate unrealized appreciation and depreciation based on that cost was: 

Federal

tax cost ($)

Gross unrealized

appreciation ($)

Gross unrealized

(depreciation) ($)

Net unrealized

appreciation ($)

1,887,987,000

1,491,729,000

(40,860,000

)

1,450,869,000

Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.

Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.

Note 5. Portfolio information

The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $510,118,479 and $453,161,645, respectively, for the six months ended August 31, 2026. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.

Note 6. Affiliated money market fund

The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. The Securities and Exchange Commission has adopted amendments to money market fund rules requiring institutional prime money market funds like the Affiliated MMF to be subject to a discretionary liquidity fee of up to 2% if the imposition of such a fee is determined to be in the best interest of the Affiliated MMF and to a mandatory liquidity fee if daily net redemptions exceed 5% of net assets.

Note 7. Interfund lending

Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.

Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.

Columbia Select Mid Cap Value Fund  | 2026

21


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

The Fund’s activity in the Interfund Program during the six months ended August 31, 2026 was as follows: 

Borrower or lender

Average loan

balance ($)

Weighted average

interest rate (%)

Number of days

with outstanding loans

Lender

300,000

4.18

3

Interest income earned by the Fund is recorded as Interfund lending in the Statement of Operations. The Fund had no outstanding interfund loans at August 31, 2026.

Note 8. Line of credit

Effective October 22, 2026, the Fund has access to a revolving credit facility with a syndicate of banks led by State Street Bank and Trust Company, Citibank, N.A. and Wells Fargo Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is an agreement between the Fund and certain other funds managed by the Investment Manager, severally and not jointly, permits aggregate borrowings up to $750 million. Interest is currently charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate and (ii) the overnight bank funding rate, plus 1.00% in each case. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in October unless extended or renewed. Prior to October 22, 2026, the Fund had access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A., which permitted aggregate borrowings up to $750 million. Interest was charged to each participating fund based on its borrowings at a rate equal to the highest of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case.

The Fund had no borrowings during the six months ended August 31, 2026.

Note 9. Risks and uncertainties

An investment in the Fund involves risks, including market risk and concentration risk, among others. The value of the Fund’s holdings and the Fund’s net asset value may go down. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally.

Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, other conflicts, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.

To the extent that the Fund concentrates its investment in particular issuers, countries, geographic regions, industries or sectors, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of issuers, countries, geographic regions, industries, sectors or investments.

Additional risk factors of the Fund are described more fully in the Fund’s Prospectus and Statement of Additional Information.

Note 10. Subsequent events

Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.

22

Columbia Select Mid Cap Value Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Note 11. Information regarding pending and settled legal proceedings

Ameriprise Financial and certain of its affiliates are involved, in the normal course of business, in legal proceedings that include regulatory inquiries, arbitration and litigation (including class actions) concerning matters arising in connection with the conduct of their activities as part of a diversified financial services firm. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.

There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, it is inherently difficult to determine whether any loss is probable or even reasonably possible, or to reasonably estimate the amount of any loss that may result from such matters. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief, and may lead to further claims, examinations, adverse publicity or reputational damage, each of which could have a material adverse effect on the consolidated financial condition or results of operations or financial condition of Ameriprise Financial or one or more of its affiliates that provide services to the Fund.

Columbia Select Mid Cap Value Fund  | 2026

23


 Approval of Management Agreement

(Unaudited)

Columbia Management Investment Advisers, LLC (the Investment Manager, and together with its domestic and global affiliates, Columbia Threadneedle Investments), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial), serves as the investment manager to Columbia Select Mid Cap Value Fund (the Fund). Under a management agreement (the Management Agreement), the Investment Manager provides investment advice and other services to the Fund.  The Investment Manager also provides investment advice and other services to other funds in the Columbia Fund family (collectively, the Funds).

On an annual basis, the Fund’s Board of Trustees (the Board), including the independent Board members (the Independent Trustees), considers renewal of the Management Agreement.  The Investment Manager prepared detailed reports for the Board and its Contracts Committee (including its Contracts Subcommittee) in March, April and June 2026, including reports providing the results of analyses performed by a third-party data provider, Broadridge Financial Solutions, Inc. (Broadridge), and comprehensive responses by the Investment Manager to written requests for information by independent legal counsel to the Independent Trustees (Independent Legal Counsel), to assist the Board in making this determination.  In addition, throughout the year, the Board (or its committees or subcommittees) regularly meets with portfolio management teams and senior management personnel and reviews information prepared by the Investment Manager addressing the services the Investment Manager provides and Fund performance.  The Board also accords appropriate weight to the work, deliberations and conclusions of the various committees (including their subcommittees), such as the Contracts Committee, the Investment Review Committee, the Audit Committee and the Compliance Committee, in determining whether to continue the Management Agreement.

The Board, at its June 18, 2026 Board meeting (the June Meeting), considered the renewal of the Management Agreement for an additional one-year term.  At the June Meeting, Independent Legal Counsel reviewed with the Independent Trustees various factors relevant to the Board’s consideration of advisory agreements and the Board’s legal responsibilities related to such consideration. The Independent Trustees considered such information as they, their legal counsel or the Investment Manager believed reasonably necessary to evaluate and to approve the continuation of the Management Agreement. Among other things, the information and factors considered included the following:

•

Information on the investment performance of the Fund relative to the performance of a group of mutual funds determined to be comparable to the Fund by Broadridge, as well as performance relative to one or more benchmarks; 

•

Information on the Fund’s management fees and total expenses, including information comparing the Fund’s expenses to those of a group of comparable mutual funds, as determined by Broadridge; 

•

The Investment Manager’s agreement to contractually limit or cap total operating expenses for the Fund so that total operating expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses and infrequent and/or unusual expenses) would not exceed a specified annual rate, as a percentage of the Fund’s net assets;

•

Terms of the Management Agreement;

•

Descriptions of other agreements and arrangements with affiliates of the Investment Manager relating to the operations of the Fund, including agreements with respect to the provision of transfer agency and shareholder services to the Fund;

•

Descriptions of various services performed by the Investment Manager under the Management Agreement, including portfolio management and portfolio trading practices;

•

Information regarding any recently negotiated management fees of similarly-managed portfolios of other institutional clients of the Investment Manager;

•

Information regarding the resources of the Investment Manager, including information regarding senior management, portfolio managers and other personnel;

•

Information regarding the capabilities of the Investment Manager with respect to compliance monitoring services; 

•

The profitability to the Investment Manager and its affiliates from their relationships with the Fund; and

24

Columbia Select Mid Cap Value Fund  | 2026


Approval of Management Agreement (continued)

(Unaudited)

•

Report provided by the Board’s independent fee consultant, JDL Consultants, LLC (JDL).

Following an analysis and discussion of the foregoing, and the factors identified below, the Board, including all of the Independent Trustees, approved the renewal of the Management Agreement.

Nature, extent and quality of services provided by the Investment Manager

The Board analyzed various reports and presentations it had received detailing the services performed by the Investment Manager, as well as its history, expertise, resources and relative capabilities, and the qualifications of its personnel.

The Board specifically considered the many developments during recent years concerning the services provided by the Investment Manager. Among other things, the Board noted the organization and depth of the equity and credit research departments. The Board further observed the enhancements to the investment risk management department’s processes, systems and oversight over the past several years.  The Board also took into account the broad scope of services provided by the Investment Manager to the Fund, including, among other services, investment, risk and compliance oversight.  The Board also took into account the information it received concerning the Investment Manager’s ability to attract and retain key portfolio management personnel and that it has sufficient resources to provide competitive and adequate compensation to investment personnel.

In connection with the Board’s evaluation of the overall package of services provided by the Investment Manager, the Board also considered the nature, quality and range of administrative services provided to the Fund by the Investment Manager, as well as the achievements in 2025 in the performance of administrative services, and noted the various enhancements anticipated for 2026.  In evaluating the quality of services provided under the Management Agreement, the Board also took into account the organization and strength of the Fund’s and its service providers’ compliance programs.  The Board also reviewed the financial condition of the Investment Manager and its affiliates and each entity’s ability to carry out its responsibilities under the Management Agreement and the Fund’s other service agreements.

In addition, the Board discussed the acceptability of the terms of the Management Agreement, noting that no changes were proposed from the form of agreement previously approved.  The Board also noted the wide array of legal and compliance services provided to the Fund under the Management Agreement.

After reviewing these and related factors (including investment performance as discussed below), the Board concluded, within the context of its overall conclusions, that the nature, extent and quality of the services provided to the Fund under the Management Agreement supported the continuation of the Management Agreement.

Investment performance

The Board carefully reviewed the investment performance of the Fund, including detailed reports providing the results of analyses performed by each of the Investment Manager, Broadridge and JDL collectively showing, for various periods (including since manager inception): (i) the performance of the Fund, (ii) the Fund’s performance relative to peers and benchmarks and (iii) the net assets of the Fund.  The Board observed that the Fund’s performance for certain periods ranked above median relative to its peers based on information provided by Broadridge.

The Board also reviewed a description of the third-party data provider’s methodology for identifying the Fund’s peer groups for purposes of performance and expense comparisons. 

The Board also considered the Investment Manager’s performance and reputation generally.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the performance of the Fund and the Investment Manager, in light of other considerations, supported the continuation of the Management Agreement. 

Comparative fees, costs of services provided and the profits realized by the Investment Manager and its affiliates from their relationships with the Fund

The Board reviewed comparative fees and the costs of services provided under the Management Agreement.  The Board members considered detailed comparative information set forth in an annual report on fees and expenses, including, among other things, data (based on analyses conducted by Broadridge and JDL) showing a comparison of the Fund’s expenses

Columbia Select Mid Cap Value Fund  | 2026

25


Approval of Management Agreement (continued)

(Unaudited)

with median expenses paid by funds in its comparative peer universe, as well as data showing the Fund’s contribution to the Investment Manager’s profitability. The Board reviewed the fees charged to comparable institutional or other accounts/vehicles managed by the Investment Manager and discussed differences in how the products are managed and operated, thus explaining many of the differences in fees.

The Board considered the reports of JDL, which assisted in the Board’s analysis of the Funds’ performance and expenses and the reasonableness of the Funds’ fee rates.  The Board accorded particular weight to the notion that a primary objective of the level of fees is to achieve a rational pricing model applied consistently across the various product lines in the Fund family, while assuring that the overall fees for each Fund (with certain exceptions) are generally in line with the current “pricing philosophy” such that Fund total expense ratios, in general, approximate or are lower than the median expense ratios of funds in the same Lipper comparison universe.  The Board took into account that the Fund’s total expense ratio (after considering proposed expense caps/waivers) approximated the peer universe’s median expense ratio. 

After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the levels of management fees and expenses of the Fund, in light of other considerations, supported the continuation of the Management Agreement.

The Board also considered the profitability of the Investment Manager and its affiliates in connection with the Investment Manager providing management services to the Fund.  With respect to the profitability of the Investment Manager and its affiliates, the Independent Trustees referred to information discussing the profitability to the Investment Manager and Ameriprise Financial from managing, operating and distributing the Funds.  The Board considered that the profitability generated by the Investment Manager in 2025 had increased slightly from 2024 levels due to a variety of factors, including the increased assets under management of the Funds.  It also took into account the indirect economic benefits flowing to the Investment Manager or its affiliates in connection with managing or distributing the Funds, such as the enhanced ability to offer various other financial products to Ameriprise Financial customers, soft dollar benefits and overall reputational advantages.  The Board noted that the fees paid by the Fund should permit the Investment Manager to offer competitive compensation to its personnel, make necessary investments in its business and earn an appropriate profit.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the costs of services provided and the profitability to the Investment Manager and its affiliates from their relationships with the Fund supported the continuation of the Management Agreement.

Economies of scale

The Board considered the potential existence of economies of scale in the provision by the Investment Manager of services to the Fund, and whether those economies of scale were shared with the Fund through breakpoints in investment management fees or other means, such as expense limitation arrangements and additional investments by the Investment Manager in investment, trading, compliance and other resources. The Board considered the economies of scale that might be realized as the Fund’s net asset level grows and took note of the extent to which Fund shareholders might also benefit from such growth.  In this regard, the Board took into account that management fees decline as Fund assets exceed various breakpoints, all of which have not been surpassed. The Board observed that the Management Agreement thus provides for breakpoints in the management fee rate schedule that allow opportunities for shareholders to realize lower fees as Fund assets grow and that there are additional opportunities through other means for sharing economies of scale with shareholders. 

Conclusion

The Board reviewed all of the above considerations in reaching its decision to approve the continuation of the Management Agreement.  In reaching its conclusions, no single factor was determinative. 

On June 18, 2026, the Board, including all of the Independent Trustees, determined that fees payable under the Management Agreement were fair and reasonable in light of the extent and quality of services provided and approved the renewal of the Management Agreement.

26

Columbia Select Mid Cap Value Fund  | 2026


[THIS PAGE INTENTIONALLY LEFT BLANK]


Columbia Select Mid Cap Value Fund

P.O. Box 219104

Kansas City, MO 64121-9104

  

Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.

Columbia Threadneedle Investments® (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.

© 2026 Columbia Management Investment Advisers, LLC.

columbiathreadneedleus.com/investor/

SAR197_(10/26)



  

Columbia Small Cap Index Fund

Semi-Annual Financial Statements and Additional Information

August 31, 2026 (Unaudited)

Not FDIC or NCUA Insured

No Financial Institution Guarantee

May Lose Value


Table of Contents

Portfolio of Investments

3

Statement of Assets and Liabilities

16

Statement of Operations

17

Statement of Changes in Net Assets

18

Financial Highlights

20

Notes to Financial Statements

22

Approval of Management Agreement

32

Columbia Small Cap Index Fund | 2026


Portfolio of Investments

August 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

Investments in securities

Common Stocks 98.5%

Issuer

Shares

Value ($)

Communication Services 3.4%

Diversified Telecommunication Services 0.7%

Cogent Communications Holdings, Inc.

68,491

653,404

Iridium Communications, Inc.

151,590

7,121,698

Lumen Technologies, Inc.(a)

1,359,050

8,494,063

Shenandoah Telecommunications Co.

65,835

814,379

Uniti Group, Inc.(a)

261,107

2,590,181

Total

19,673,725

Entertainment 0.8%

Cinemark Holdings, Inc.

147,484

5,251,905

Madison Square Garden Sports Corp., Class A(a)

25,784

9,919,878

Sphere Entertainment Co.(a)

38,569

5,256,955

Total

20,428,738

Interactive Media & Services 1.2%

Cargurus, Inc.(a)

108,925

3,884,266

Match Group, Inc.

334,451

13,595,433

People, Inc.(a)

89,493

3,425,792

QuinStreet, Inc.(a)

82,363

1,601,137

TripAdvisor, Inc.(a)

166,835

1,588,269

Yelp, Inc.(a)

74,902

1,674,060

Ziff Davis, Inc.(a)

52,813

2,912,637

ZoomInfo Technologies, Inc.(a)

371,851

1,576,648

Total

30,258,242

Media 0.5%

DoubleVerify Holdings, Inc.(a)

182,627

2,447,202

John Wiley & Sons, Inc., Class A

56,143

2,941,332

Scholastic Corp.

23,477

901,517

Versant Media Group, Inc.

202,334

8,319,974

Total

14,610,025

Wireless Telecommunication Services 0.2%

Telephone and Data Systems, Inc.

138,693

4,671,180

Total Communication Services

89,641,910

Common Stocks (continued)

Issuer

Shares

Value ($)

Consumer Discretionary 13.7%

Automobile Components 1.5%

Adient PLC(a)

112,426

2,132,721

Dana, Inc.

156,037

4,677,989

Dauch Corp.(a)

340,330

2,130,466

Dorman Products, Inc.(a)

38,989

5,023,733

Fox Factory Holding Corp.(a)

60,127

1,228,395

Gentherm, Inc.(a)

43,969

1,727,542

Goodyear Tire & Rubber Co. (The)(a)

412,121

2,583,999

LCI Industries

34,819

3,503,836

Patrick Industries, Inc.

47,161

3,853,997

Phinia, Inc.

53,080

3,632,795

Standard Motor Products, Inc.

30,324

1,143,821

Versigent PLC(a)

101,646

4,818,020

XPEL, Inc.(a)

35,960

1,771,390

Total

38,228,704

Automobiles 0.0%

Winnebago Industries, Inc.

40,527

1,219,457

Broadline Retail 0.5%

Etsy, Inc.(a)

136,059

11,065,678

Kohl’s Corp.

160,945

2,868,040

Total

13,933,718

Distributors 0.7%

LKQ Corp.

365,312

9,169,331

Pool Corp.

45,981

8,576,376

Total

17,745,707

Diversified Consumer Services 1.9%

ADT, Inc.

809,572

5,982,737

Bright Horizons Family Solutions, Inc.(a)

75,426

5,595,101

Covista, Inc.(a)

48,793

6,456,778

frontdoor, Inc.(a)

100,701

8,143,690

Laureate Education, Inc., Class A(a)

182,634

6,854,254

Matthews International Corp., Class A

44,736

929,167

OneSpaWorld Holdings Ltd.

145,549

3,613,981

Perdoceo Education Corp.

84,508

2,809,046

Strategic Education, Inc.

32,071

2,656,761

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Index Fund  | 2026

3


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Stride, Inc.(a)

60,074

5,207,815

Universal Technical Institute, Inc.(a)

72,629

1,534,651

Total

49,783,981

Hotels, Restaurants & Leisure 2.8%

BJ’s Restaurants, Inc.(a)

30,134

1,916,221

Brinker International, Inc.(a)

61,492

14,050,922

Caesars Entertainment, Inc.(a)

292,026

8,673,172

Cheesecake Factory, Inc. (The)

65,538

7,175,756

Cracker Barrel Old Country Store, Inc.

32,046

1,770,221

Life Time Group Holdings, Inc.(a)

220,221

9,253,686

Marriott Vacations Worldwide Corp.

39,392

4,107,010

Monarch Casino & Resort, Inc.

17,306

2,084,508

Papa John’s International, Inc.

47,174

1,107,646

Penn Entertainment, Inc.(a)

182,127

3,043,342

Pursuit Attractions and Hospitality, Inc.(a)

29,767

1,428,816

Red Rock Resorts, Inc., Class A

68,009

3,819,386

Rush Street Interactive, Inc.(a)

149,265

3,845,066

Sabre Corp.(a)

566,788

1,229,930

Shake Shack, Inc., Class A(a)

57,854

3,985,562

Six Flags Entertainment Corp.(a)

146,537

2,205,382

United Parks & Resorts, Inc.(a)

33,791

1,351,978

Wendy’s Co. (The)

226,678

1,881,427

Total

72,930,031

Household Durables 2.3%

Cavco Industries, Inc.(a)

11,127

6,221,440

Century Communities, Inc.

35,886

2,424,099

Champion Homes, Inc.(a)

79,290

7,078,218

Dream Finders Homes, Inc., Class A(a)

39,749

558,473

Green Brick Partners, Inc.(a)

43,303

3,127,343

Installed Building Products, Inc.

32,249

7,831,025

La-Z-Boy, Inc.

58,676

1,856,509

LGI Homes, Inc.(a)

29,312

1,639,713

M/I Homes, Inc.(a)

36,690

5,459,839

Meritage Homes Corp.

95,635

6,639,938

Mohawk Industries, Inc.(a)

73,410

9,414,833

Newell Brands, Inc.

609,209

3,807,556

Somnigroup International, Inc.

1

35

Sonos, Inc.(a)

170,804

2,664,542

Total

58,723,563

Common Stocks (continued)

Issuer

Shares

Value ($)

Leisure Products 0.4%

Acushnet Holdings Corp.

39,458

3,408,777

Callaway Golf Co.(a)

195,876

3,077,212

Peloton Interactive, Inc., Class A(a)

598,104

3,205,837

Total

9,691,826

Specialty Retail 2.9%

Academy Sports & Outdoors, Inc.

92,490

3,973,370

Advance Auto Parts, Inc.

86,498

3,648,486

American Eagle Outfitters, Inc.

223,381

3,714,826

Asbury Automotive Group, Inc.(a)

26,695

5,643,323

Boot Barn Holdings, Inc.(a)

43,511

6,554,062

Buckle, Inc. (The)

43,734

1,863,068

CarMax, Inc.(a)

203,465

12,478,508

Group 1 Automotive, Inc.

16,875

4,548,488

MarineMax, Inc.(a)

27,793

1,450,239

National Vision Holdings, Inc.(a)

114,869

1,961,963

Sally Beauty Holdings, Inc.(a)

136,793

2,240,669

Signet Jewelers Ltd.

57,448

4,726,821

Sonic Automotive, Inc., Class A

18,804

1,478,935

Upbound Group, Inc.

75,222

1,376,563

Urban Outfitters, Inc.(a)

73,639

5,941,931

Victoria’s Secret & Co.(a)

113,879

9,726,405

Warby Parker, Inc., Class A(a)

144,335

3,550,641

Winmark Corp.

4,258

1,416,722

Total

76,295,020

Textiles, Apparel & Luxury Goods 0.7%

Carter’s, Inc.

52,834

1,711,293

G-III Apparel Group Ltd.

53,231

1,734,798

Kontoor Brands, Inc.

72,908

5,497,992

Steven Madden Ltd.

104,787

4,524,703

Under Armour, Inc., Class A(a)

270,744

1,364,550

Under Armour, Inc., Class C(a)

171,389

844,948

Wolverine World Wide, Inc.

117,556

2,319,380

Total

17,997,664

Total Consumer Discretionary

356,549,671

The accompanying Notes to Financial Statements are an integral part of this statement.

4

Columbia Small Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Consumer Staples 3.5%

Beverages 0.2%

National Beverage Corp.

33,562

1,061,566

Vita Coco Co., Inc. (The)(a)

63,053

3,702,157

Total

4,763,723

Consumer Staples Distribution & Retail 0.8%

Andersons, Inc. (The)

48,373

3,137,957

Grocery Outlet Holding Corp.(a)

141,833

1,694,904

PriceSmart, Inc.

36,294

6,170,343

The Chefs’ Warehouse(a)

52,035

5,852,377

United Natural Foods, Inc.(a)

87,104

3,820,381

Total

20,675,962

Food Products 1.8%

Cal-Maine Foods, Inc.

63,852

5,039,200

Campbell’s Co. (The)

282,132

6,680,886

Conagra Brands, Inc.

685,968

10,989,207

Del Monte Corp.

47,068

1,491,114

Flowers Foods, Inc.

303,753

2,101,971

Freshpet, Inc.(a)

70,460

4,922,336

J&J Snack Foods Corp.

21,510

1,896,752

John B. Sanfilippo & Son, Inc.

13,036

960,623

Lamb Weston Holdings, Inc.

197,965

10,795,031

Simply Good Foods Co. (The)(a)

119,361

1,366,683

Tootsie Roll Industries, Inc.

29,026

1,186,002

Total

47,429,805

Household Products 0.4%

Central Garden & Pet Co.(a)

11,622

499,514

Central Garden & Pet Co., Class A(a)

73,578

2,737,837

Energizer Holdings, Inc.

87,375

1,903,027

Reynolds Consumer Products, Inc.

78,570

1,818,896

WD-40 Co.

19,291

4,131,168

Total

11,090,442

Personal Care Products 0.2%

Coty, Inc., Class A(a)

530,202

1,511,076

Edgewell Personal Care Co.

66,070

1,897,530

Interparfums, Inc.

26,173

3,073,495

Total

6,482,101

Common Stocks (continued)

Issuer

Shares

Value ($)

Tobacco 0.1%

Universal Corp.

35,734

1,625,897

Total Consumer Staples

92,067,930

Energy 6.1%

Energy Equipment & Services 2.8%

Archrock, Inc.

251,285

7,920,503

Atlas Energy Solutions, Inc.(a)

111,034

1,454,545

Bristow Group, Inc.

36,930

1,676,253

Cactus, Inc., Class A

99,529

6,998,879

Helix Energy Solutions Group, Inc.(a)

196,405

2,022,972

Helmerich & Payne, Inc.

143,278

6,244,055

Innovex International, Inc.(a)

55,208

1,693,229

Kodiak Gas Services, Inc.

140,354

8,248,605

Liberty Energy, Inc., Class A

233,978

4,611,706

Noble Corp PLC

180,714

8,282,123

Oceaneering International, Inc.(a)

143,011

7,402,249

Patterson-UTI Energy, Inc.

495,299

6,260,579

RPC, Inc.

128,067

836,278

Solaris Energy Infrastructure, Inc., Class A

78,711

3,996,158

Tidewater, Inc.(a)

66,312

6,174,973

Total

73,823,107

Oil, Gas & Consumable Fuels 3.3%

California Resources Corp.

112,034

5,941,163

Centrus Energy Corp., Class A(a)

27,176

4,657,966

Comstock Resources, Inc.(a)

113,695

1,640,619

Core Natural Resources, Inc.

72,273

7,393,528

Crescent Energy Co., Class A

350,394

4,796,894

CVR Energy, Inc.

43,241

1,810,068

Dorian LPG Ltd.

52,705

2,637,358

Gulfport Energy Corp.(a)

20,870

3,745,122

International Seaways, Inc.

58,203

5,741,144

Kinetik Holdings, Inc.

74,925

4,108,138

Magnolia Oil & Gas Corp., Class A

329,797

8,855,050

Northern Oil & Gas, Inc.

149,903

3,898,977

Par Pacific Holdings, Inc.(a)

71,895

5,745,848

Peabody Energy Corp.

174,633

5,184,854

REX American Resources Corp.(a)

40,614

1,668,423

SM Energy Co.

326,558

12,141,426

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Index Fund  | 2026

5


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Talos Energy, Inc.(a)

177,107

3,056,867

World Kinect Corp.

73,631

2,632,308

Total

85,655,753

Total Energy

159,478,860

Financials 18.8%

Banks 8.7%

Ameris Bancorp

90,388

7,615,189

Atlantic Union Bankshares Corp.

205,195

8,275,514

Axos Financial, Inc.(a)

81,560

7,894,192

Banc of California, Inc.

196,162

3,652,537

BancFirst Corp.

29,856

3,260,872

Bancorp, Inc. (The)(a)

59,694

3,880,110

Bank of Hawaii Corp.

56,807

4,313,356

BankUnited, Inc.

104,209

4,751,930

Banner Corp.

48,702

3,415,958

Beacon Financial Corp.

120,173

3,731,372

Capitol Federal Financial, Inc.

167,218

1,439,747

Cathay General Bancorp

96,113

5,883,077

Central Pacific Financial Corp.

37,423

1,392,884

City Holding Co.

20,232

2,892,164

Community Financial System, Inc.

75,352

4,728,338

Customers Bancorp, Inc.(a)

45,102

3,526,074

CVB Financial Corp.

240,346

5,328,471

Dime Commercial Bancshares, Inc.

58,821

2,376,368

Eagle Bancorp, Inc.

39,789

1,085,842

Eastern Bankshares, Inc.

304,893

6,695,450

FB Financial Corp.

57,620

3,282,035

First BanCorp

220,254

6,140,682

First BanCorp

59,322

3,762,795

First Commonwealth Financial Corp.

145,229

3,006,240

First Financial Bancorp

148,940

4,859,912

First Hawaiian, Inc.

174,417

4,466,819

First Interstate BancSystem, Inc.

121,174

4,460,415

Fulton Financial Corp.

271,302

6,364,745

Hanmi Financial Corp.

42,349

1,312,819

Heritage Financial Corp.

59,099

1,688,458

Hilltop Holdings, Inc.

58,743

2,235,171

Hope Bancorp, Inc.

183,292

2,527,597

Independent Bank Corp.

69,290

5,624,962

Common Stocks (continued)

Issuer

Shares

Value ($)

Lakeland Financial Corp.

35,721

2,110,754

National Bank Holdings Corp., Class A

64,220

2,651,644

NBT Bancorp, Inc.

74,570

3,834,389

Nicolet Bankshares, Inc.

28,033

4,747,108

Northwest Bancshares, Inc.

209,782

3,207,567

OFG Bancorp

60,588

3,153,605

Park National Corp.

23,091

4,509,441

Pathward Financial, Inc.

30,267

2,465,550

Preferred Bank

15,790

1,617,370

Provident Financial Services, Inc.

186,840

4,372,056

Renasant Corp.

132,297

5,412,270

S&T Bancorp, Inc.

51,583

2,552,327

Seacoast Banking Corp. of Florida

137,959

4,684,398

ServisFirst Bancshares, Inc.

144,208

6,206,712

Simmons First National Corp., Class A

207,988

4,696,369

Southside Bancshares, Inc.

40,098

1,265,493

Tompkins Financial Corp.

18,147

1,762,437

Triumph Financial, Inc.(a)

32,426

2,310,353

TrustCo Bank Corp.

25,055

1,421,120

Trustmark Corp.

84,027

3,858,520

United Community Banks, Inc.

171,604

5,978,683

WaFd, Inc.

105,938

3,788,343

WesBanco, Inc.

137,901

5,517,419

Westamerica BanCorp

33,676

1,954,892

WSFS Financial Corp.

74,619

5,779,242

Total

225,730,157

Capital Markets 3.6%

Acadian Asset Management, Inc.

37,802

3,560,948

Artisan Partners Asset Management, Inc.,

Class A

101,788

4,333,115

BGC Group, Inc., Class A

529,927

6,364,423

Cohen & Steers, Inc.

39,800

3,210,666

Donnelley Financial Solutions, Inc.(a)

35,818

1,730,009

Lazard, Inc.

160,133

6,922,550

MarketAxess Holdings, Inc.

50,955

8,286,812

Moelis & Co., ADR, Class A

106,635

7,258,644

Piper Sandler Cos.

96,890

7,272,563

PJT Partners, Inc.

37,027

6,679,301

StepStone Group, Inc., Class A

105,715

5,524,666

The accompanying Notes to Financial Statements are an integral part of this statement.

6

Columbia Small Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

StoneX Group, Inc.(a)

151,693

10,387,937

Victory Capital Holdings, Inc., Class A

66,345

7,829,374

Virtu Financial, Inc. Class A

117,286

7,698,653

Virtus Investment Partners, Inc.

9,006

1,490,493

WisdomTree, Inc.

180,410

4,340,665

Total

92,890,819

Consumer Finance 1.3%

Bread Financial Holdings, Inc.

57,934

6,052,365

Credit Acceptance Corp.(a)

8,398

5,036,617

Dave, Inc.(a)

14,874

5,347,500

Encore Capital Group, Inc.(a)

30,740

2,982,087

Enova International, Inc.(a)

35,680

8,089,370

Ezcorp, Inc., Class A(a)

83,970

2,713,910

Navient Corp.

92,983

884,268

PROG Holdings, Inc.

57,445

2,190,378

World Acceptance Corp.(a)

3,871

711,529

Total

34,008,024

Financial Services 2.3%

Enact Holdings, Inc.

40,031

1,929,494

EVERTEC, Inc.

88,349

2,617,781

HA Sustainable Infrastructure Capital, Inc.

183,237

7,247,023

Jackson Financial, Inc., Class A

99,995

13,342,333

Merchants Bancorp

42,151

2,218,829

NCR Atleos Corp.(a)

105,784

4,857,601

NMI Holdings, Inc., Class A(a)

108,926

4,830,868

Payoneer Global, Inc.(a)

388,797

2,764,347

Radian Group, Inc.

190,656

6,836,924

Remitly Global, Inc.(a)

247,555

6,619,621

Sezzle, Inc.(a)

24,107

2,906,099

Walker & Dunlop, Inc.

49,223

1,995,008

Western Union Co. (The)

447,960

3,207,393

Total

61,373,321

Insurance 2.1%

AMERISAFE, Inc.

26,799

697,846

Assured Guaranty Ltd.

59,650

4,455,855

Employers Holdings, Inc.

26,156

1,283,998

F&G Annuities & Life, Inc.

53,187

1,265,851

Genworth Financial, Inc., Class A(a)

549,147

5,458,521

Common Stocks (continued)

Issuer

Shares

Value ($)

Goosehead Insurance, Inc., Class A(a)

33,939

2,329,912

HCI Group, Inc.

15,133

2,810,652

Horace Mann Educators Corp.

57,897

2,946,378

Kemper Corp.

84,412

2,378,730

Lincoln National Corp.

243,998

10,391,875

Mercury General Corp.

38,119

3,886,613

Palomar Holdings, Inc.

38,001

5,037,793

Safety Insurance Group, Inc.

21,052

2,183,935

SiriusPoint Ltd.(a)

149,990

3,628,258

Stewart Information Services Corp.

43,626

2,994,925

Trupanion, Inc.(a)

48,782

1,421,995

United Fire Group, Inc.

31,635

1,704,178

Total

54,877,315

Mortgage Real Estate Investment Trusts (REITs) 0.8%

Arbor Realty Trust, Inc.

275,801

1,381,763

ARMOUR Residential REIT, Inc.

177,853

2,884,776

Blackstone Mortgage Trust, Inc.

224,053

3,114,337

Ellington Financial, Inc.

179,786

2,405,537

Franklin BSP Realty Trust, Inc.

110,347

923,604

New Residential Investment Corp.

800,484

8,028,854

New York Mortgage Trust, Inc.

119,821

1,167,056

PennyMac Mortgage Investment Trust

125,028

1,165,261

Total

21,071,188

Total Financials

489,950,824

Health Care 10.8%

Biotechnology 2.7%

ACADIA Pharmaceuticals, Inc.(a)

181,680

5,252,369

ADMA Biologics, Inc.(a)

332,309

3,120,382

Alkermes PLC(a)

238,975

11,229,435

Arcus Biosciences, Inc.(a)

124,427

3,643,223

Protagonist Therapeutics, Inc.(a)

86,675

12,806,231

PTC Therapeutics, Inc.(a)

118,930

8,270,392

Sarepta Therapeutics, Inc.(a)

151,372

3,183,353

TG Therapeutics, Inc.(a)

188,974

10,261,288

Veracyte, Inc.(a)

114,405

4,941,152

Vericel Corp.(a)

73,220

2,921,478

Vir Biotechnology, Inc.(a)

174,102

1,904,676

Xencor, Inc.(a)

106,303

2,898,351

Total

70,432,330

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Index Fund  | 2026

7


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Health Care Equipment & Supplies 2.9%

Artivion, Inc.(a)

61,248

1,653,083

CONMED Corp.

43,169

2,151,975

Enovis Corp.(a)

82,532

2,029,462

Glaukos Corp.(a)

84,211

15,120,927

ICU Medical, Inc.(a)

35,836

6,197,836

Inspire Medical Systems, Inc.(a)

37,593

2,367,983

Integer Holdings Corp.(a)

48,684

6,097,671

Integra LifeSciences Holdings Corp.(a)

95,927

1,623,085

LeMaitre Vascular, Inc.

30,142

2,419,800

Merit Medical Systems, Inc.(a)

85,532

7,754,331

Neogen Corp.(a)

312,093

3,607,795

Omnicell, Inc.(a)

65,206

2,292,643

QuidelOrtho Corp.(a)

97,770

1,410,821

STAAR Surgical Co.(a)

71,385

1,612,587

Tandem Diabetes Care, Inc.(a)

98,255

2,162,593

Teleflex, Inc.

63,473

9,016,340

TransMedics Group, Inc.(a)

49,553

4,205,563

UFP Technologies, Inc.(a)

11,093

3,305,159

Total

75,029,654

Health Care Providers & Services 2.1%

Acadia Healthcare Co., Inc.(a)

131,859

3,634,034

AdaptHealth Corp.(a)

154,598

864,203

Addus HomeCare Corp.(a)

26,215

3,006,074

Alignment Healthcare, Inc.(a)

237,127

3,177,502

AMN Healthcare Services, Inc.(a)

55,610

1,906,311

Astrana Health, Inc.(a)

60,863

2,319,489

Concentra Group Holdings Parent, Inc.

170,625

5,756,887

Corvel Corp.(a)

44,738

3,081,553

LifeStance Health Group, Inc.(a)

328,477

4,059,976

National HealthCare Corp.

17,916

3,879,351

NeoGenomics, Inc.(a)

186,694

3,343,690

Pediatrix Medical Group, Inc.(a)

114,971

3,015,689

Privia Health Group, Inc.(a)

169,832

3,479,858

Progyny, Inc.(a)

104,448

2,672,824

RadNet, Inc.(a)

101,469

7,693,380

U.S. Physical Therapy, Inc.

21,821

1,696,365

Total

53,587,186

Common Stocks (continued)

Issuer

Shares

Value ($)

Health Care Technology 0.3%

Certara, Inc.(a)

167,283

1,386,776

HealthStream, Inc.

33,510

973,465

Schrodinger, Inc.(a)

81,774

1,594,593

Waystar Holding Corp.(a)

165,009

4,319,936

Total

8,274,770

Life Sciences Tools & Services 0.2%

Azenta, Inc.(a)

58,817

1,920,375

BioLife Solutions, Inc.(a)

56,740

2,103,352

Fortrea Holdings, Inc.(a)

135,635

2,491,615

Total

6,515,342

Pharmaceuticals 2.6%

Amneal Pharmaceuticals, Inc.(a)

246,999

4,315,073

Amphastar Pharmaceuticals, Inc.(a)

48,679

1,096,738

ANI Pharmaceuticals, Inc.(a)

26,147

1,915,268

Collegium Pharmaceutical, Inc.(a)

46,503

1,144,439

Corcept Therapeutics, Inc.(a)

136,987

15,527,477

Harmony Biosciences Holdings, Inc.(a)

57,274

2,255,450

Indivior Pharmaceuticals, Inc.(a)

174,808

6,106,043

Innoviva, Inc.(a)

100,534

2,088,091

Ligand Pharmaceuticals, Inc.(a)

28,734

8,163,329

Liquidia Corp.(a)

100,727

6,866,560

Organon & Co.

376,509

5,180,764

Pacira Pharmaceuticals, Inc.(a)

56,416

1,461,174

Perrigo Co. PLC

198,388

2,904,400

Phibro Animal Health Corp., Class A

30,208

1,140,050

Prestige Consumer Healthcare, Inc.(a)

67,921

3,516,949

Supernus Pharmaceuticals, Inc.(a)

83,216

3,678,979

Total

67,360,784

Total Health Care

281,200,066

Industrials 17.2%

Aerospace & Defense 1.2%

AAR Corp.(a)

56,245

7,271,916

Karman Holdings, Inc.(a)

131,108

5,434,426

Mercury Systems, Inc.(a)

75,757

6,615,859

National Presto Industries, Inc.

7,601

1,153,148

The accompanying Notes to Financial Statements are an integral part of this statement.

8

Columbia Small Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

V2X, Inc.(a)

29,179

2,251,452

VSE Corp.

40,227

8,394,570

Total

31,121,371

Air Freight & Logistics 0.1%

HUB Group, Inc., Class A

86,856

3,462,949

Building Products 2.1%

Apogee Enterprises, Inc.

30,426

1,188,440

Armstrong World Industries, Inc.

61,192

10,560,515

AZZ, Inc.

42,841

5,876,072

CSW Industrials, Inc.

23,614

7,295,545

Gibraltar Industries, Inc.(a)

42,528

1,913,335

Griffon Corp.

55,241

5,379,921

Hayward Holdings, Inc.(a)

286,189

4,020,955

MasterBrand, Inc.(a)

291,085

2,401,453

Quanex Building Products Corp.

65,214

1,253,413

Resideo Technologies, Inc.(a)

199,741

3,866,986

Zurn Elkay Water Solutions Corp.

212,938

10,178,436

Total

53,935,071

Commercial Services & Supplies 2.3%

ABM Industries, Inc.

83,923

3,913,330

Brady Corp., Class A

62,641

5,678,407

Casella Waste Systems, Inc., Class A(a)

89,786

8,282,759

CoreCivic, Inc.(a)

141,783

4,710,031

Deluxe Corp.

65,644

1,516,376

GEO Group, Inc. (The)(a)

188,050

5,981,871

Healthcare Services Group, Inc.(a)

98,421

2,164,278

HNI Corp.

100,125

4,849,054

Interface, Inc.

83,239

3,156,423

Liquidity Services, Inc.(a)

33,977

1,416,161

MillerKnoll, Inc.

98,034

2,214,588

OPENLANE, Inc.(a)

162,329

5,778,912

Pitney Bowes, Inc.

178,656

3,060,377

Unifirst Corp.

20,837

5,763,514

Vestis Corp.(a)

160,997

2,014,072

Total

60,500,153

Common Stocks (continued)

Issuer

Shares

Value ($)

Construction & Engineering 2.5%

Arcosa, Inc.

70,392

10,227,958

Argan, Inc.

20,015

8,506,175

Construction Partners, Inc., Class A(a)

68,801

7,306,666

Everus Construction Group, Inc.(a)

73,182

8,425,444

Granite Construction, Inc.

62,723

7,561,885

MYR Group, Inc.(a)

22,325

6,505,951

Primoris Services Corp.

77,789

5,609,365

Tutor Perini Corp.

63,368

5,609,335

WillScot Holdings Corp.

259,505

5,371,753

Total

65,124,532

Electrical Equipment 0.4%

Powell Industries, Inc.

40,743

7,322,739

Sunrun, Inc.(a)

342,024

2,931,146

Total

10,253,885

Ground Transportation 1.0%

ArcBest Corp.

31,921

4,404,140

Heartland Express, Inc.

65,551

810,210

Lyft, Inc., Class A(a)

544,378

9,199,988

Marten Transport Ltd.

83,056

1,197,668

RXO, Inc.(a)

236,457

5,024,711

Schneider National, Inc., Class B

71,303

2,460,667

Werner Enterprises, Inc.

85,954

3,367,678

Total

26,465,062

Machinery 4.0%

Alamo Group, Inc.

15,527

2,555,434

Albany International Corp., Class A

40,719

2,257,054

Astec Industries, Inc.

32,967

1,402,746

Atmus Filtration Technologies, Inc.

117,099

5,530,586

Enerpac Tool Group Corp.

73,901

2,757,985

EnPro, Inc.

30,291

8,972,800

ESCO Technologies, Inc.

37,145

10,141,700

Federal Signal Corp.

87,463

10,233,171

Franklin Electric Co., Inc.

54,478

5,452,703

Gates Industrial Corp., Ltd.(a)

364,000

9,311,120

Greenbrier Companies, Inc. (The)

44,359

1,999,260

JBT Marel Corp.

74,654

8,724,813

Kadant, Inc.

16,930

5,064,440

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Index Fund  | 2026

9


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Kennametal, Inc.

109,268

3,205,923

Lindsay Corp.

14,905

1,712,734

Midera Food Processing, Inc.(a)

59,640

2,795,923

Mueller Water Products, Inc., Class A

224,343

5,415,640

Proto Labs, Inc.(a)

34,115

2,731,247

Standex International Corp.

17,370

5,031,394

Tennant Co.

24,430

1,700,328

Trinity Industries, Inc.

113,993

3,285,278

Worthington Enterprises, Inc.

44,489

2,555,448

Total

102,837,727

Marine Transportation 0.4%

Matson, Inc.

43,390

9,754,506

Passenger Airlines 0.4%

Allegiant Travel Co.(a)

32,161

2,445,844

JetBlue Airways Corp.(a)

426,712

1,962,875

SkyWest, Inc.(a)

56,864

5,382,747

Total

9,791,466

Professional Services 2.1%

Amentum Holdings, Inc.(a)

220,684

4,411,473

Concentrix Corp.

62,102

1,869,270

First Advantage Corp.(a)

130,351

2,739,978

Insperity, Inc.

51,989

2,773,613

Korn/Ferry International

74,394

6,364,407

Legalzoom.com, Inc.(a)

159,967

996,594

ManpowerGroup, Inc.

66,680

4,197,506

Mobility Global, Inc.

434,719

8,824,796

Paycom Software, Inc.

59,499

14,226,211

Robert Half, Inc.

144,147

6,535,625

Upwork, Inc.(a)

177,096

1,599,177

Verra Mobility Corp.(a)

217,800

964,854

Total

55,503,504

Trading Companies & Distributors 0.7%

Boise Cascade Co.

50,454

3,935,917

DNOW, Inc.(a)

261,729

4,195,516

DXP Enterprises, Inc.(a)

18,007

3,380,454

Rush Enterprises, Inc., Class A

87,456

6,719,244

Total

18,231,131

Total Industrials

446,981,357

Common Stocks (continued)

Issuer

Shares

Value ($)

Information Technology 12.3%

Communications Equipment 1.2%

Calix, Inc.(a)

83,218

3,172,270

Digi International, Inc.(a)

54,057

4,051,032

Extreme Networks, Inc.(a)

187,506

4,217,010

Harmonic, Inc.(a)

155,558

1,863,585

Netscout Systems, Inc.(a)

97,382

3,781,343

Viasat, Inc.(a)

194,750

13,100,832

Total

30,186,072

Electronic Equipment, Instruments & Components 3.0%

ADI Global Distribution, Inc.(a)

99,871

2,184,179

Arlo Technologies, Inc.(a)

155,722

2,047,744

Badger Meter, Inc.

41,846

5,668,878

Benchmark Electronics, Inc.

51,439

3,615,133

CTS Corp.

40,996

2,315,044

ePlus, Inc.

37,487

3,297,731

Insight Enterprises, Inc.(a)

43,306

6,799,908

Itron, Inc.(a)

63,572

6,167,120

Knowles Corp.(a)

122,675

4,193,031

Mirion Technologies, Inc.(a)

350,780

5,286,255

Napco Security Technologies, Inc.

51,224

1,856,358

OSI Systems, Inc.(a)

22,215

4,618,721

PC Connection, Inc.

16,276

1,299,964

Plexus Corp.(a)

38,362

9,186,548

Ralliant Corp.

160,486

9,906,801

Rogers Corp.(a)

23,800

2,988,566

ScanSource, Inc.(a)

26,810

1,530,583

Vishay Intertechnology, Inc.

199,307

6,064,912

Total

79,027,476

IT Services 0.5%

DXC Technology Co.(a)

234,393

2,648,641

EPAM Systems, Inc.(a)

74,906

8,826,174

Everforth, Inc.(a)

58,785

1,905,810

Total

13,380,625

The accompanying Notes to Financial Statements are an integral part of this statement.

10

Columbia Small Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Semiconductors & Semiconductor Equipment 3.7%

ACM Research, Inc., Class A(a)

81,818

5,957,987

Alpha & Omega Semiconductor Ltd.(a)

35,618

878,340

Axcelis Technologies, Inc.(a)

44,065

5,082,016

Cohu, Inc.(a)

67,638

3,118,112

Diodes, Inc.(a)

65,875

5,981,450

Enphase Energy, Inc.(a)

188,968

6,882,215

Formfactor, Inc.(a)

111,770

11,245,180

Ichor Holdings Ltd.(a)

49,823

2,669,018

Impinj, Inc.(a)

38,867

6,775,295

Kulicke & Soffa Industries, Inc.

75,033

6,007,142

MaxLinear, Inc.(a)

120,685

7,230,238

PDF Solutions, Inc.(a)

54,026

2,403,076

Penguin Solutions, Inc.(a)

66,212

3,249,685

Photronics, Inc.(a)

84,544

2,379,068

Power Integrations, Inc.

79,890

4,104,748

Qorvo, Inc.(a)

114,835

11,033,347

SolarEdge Technologies, Inc.(a)

87,199

2,807,808

Ultra Clean Holdings, Inc.(a)

64,273

4,359,638

Veeco Instruments, Inc.(a)

87,507

3,876,560

Total

96,040,923

Software 3.7%

A10 Networks, Inc.

103,229

2,620,984

ACI Worldwide, Inc.(a)

145,760

7,766,093

Adeia, Inc.

158,136

3,989,771

Agilysys, Inc.(a)

36,575

4,257,696

Alarm.com Holdings, Inc.(a)

70,916

4,081,925

Blackbaud, Inc.(a)

50,617

2,432,653

Blackline, Inc.(a)

70,649

2,346,960

Box, Inc., Class A(a)

198,505

7,102,509

CleanSpark, Inc.(a)

367,918

4,275,207

Clear Secure, Inc., Class A

131,272

5,795,659

Five9, Inc.(a)

109,775

3,793,824

Life360, Inc.(a)

116,181

4,979,518

LiveRamp Holdings, Inc.(a)

90,507

3,413,924

MARA Holdings, Inc.(a)

546,655

5,887,474

N-Able, Inc.(a)

108,036

429,983

NCR Voyix Corp.(a)

197,583

1,655,746

Progress Software Corp.(a)

60,326

2,791,284

Common Stocks (continued)

Issuer

Shares

Value ($)

Q2 Holdings, Inc.(a)

89,754

5,837,600

RingCentral, Inc., Class A

106,212

7,394,480

Sprinklr, Inc., Class A(a)

161,882

1,329,051

SPS Commerce, Inc.(a)

52,638

4,495,285

Tenable Holdings, Inc.(a)

157,856

6,022,206

Teradata Corp.(a)

134,918

3,912,622

Total

96,612,454

Technology Hardware, Storage & Peripherals 0.2%

Corsair Gaming, Inc.(a)

67,427

819,238

Diebold Nixdorf, Inc.(a)

49,649

3,368,188

Total

4,187,426

Total Information Technology

319,434,976

Materials 4.3%

Chemicals 2.9%

Balchem Corp.

46,067

8,102,725

Celanese Corp., Class A

157,231

7,150,866

Chemours Co. (The)

215,607

3,354,845

Eastman Chemical Co.

163,952

11,876,683

Element Solutions, Inc.

328,320

11,668,493

FMC Corp.

179,286

2,067,168

Hawkins, Inc.

29,920

3,598,478

HB Fuller Co.

78,122

4,292,804

Ingevity Corp.(a)

49,855

3,454,453

Innospec, Inc.

35,315

3,314,666

Koppers Holdings, Inc.

27,574

1,264,819

Minerals Technologies, Inc.

44,460

3,153,103

Quaker Chemical Corp.

19,671

3,261,452

Sensient Technologies Corp.

61,034

8,235,928

Stepan Co.

30,937

1,936,965

Total

76,733,448

Construction Materials 0.1%

United States Lime & Minerals, Inc.

15,181

1,793,332

Containers & Packaging 0.1%

O-I Glass, Inc.(a)

219,797

1,597,924

Metals & Mining 1.1%

Alpha Metallurgical Resources, Inc.(a)

15,314

3,609,510

Century Aluminum Co.(a)

80,886

3,702,152

Kaiser Aluminum Corp.

23,213

3,685,760

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Index Fund  | 2026

11


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Materion Corp.

29,824

7,040,850

Metallus, Inc.(a)

51,329

1,001,942

Warrior Met Coal, Inc.

75,706

8,194,418

Worthington Steel, Inc.

46,620

1,606,059

Total

28,840,691

Paper & Forest Products 0.1%

Sylvamo Corp.

47,857

1,719,023

Total Materials

110,684,418

Real Estate 6.4%

Diversified REITs 0.7%

American Assets Trust, Inc.

67,881

1,524,608

Broadstone Net Lease, Inc.

274,950

5,735,457

Essential Properties Realty Trust, Inc.

310,047

9,301,410

Global Net Lease, Inc.

299,568

2,750,034

Total

19,311,509

Health Care REITs 0.4%

LTC Properties, Inc.

73,382

2,958,762

Medical Properties Trust, Inc.

703,181

2,791,629

National Health Investors, Inc.

69,496

4,941,860

Total

10,692,251

Hotel & Resort REITs 1.1%

Apple Hospitality REIT, Inc.

314,774

5,020,645

DiamondRock Hospitality Co.

293,193

3,609,206

Pebblebrook Hotel Trust

162,545

2,945,315

Ryman Hospitality Properties, Inc.

97,796

12,396,621

Sunstone Hotel Investors, Inc.

267,098

2,983,485

Xenia Hotels & Resorts, Inc.

132,260

2,479,875

Total

29,435,147

Industrial REITs 0.7%

Innovative Industrial Properties, Inc.

41,255

2,348,235

LXP Industrial Trust

84,525

5,131,513

Terreno Realty Corp.

152,420

10,091,728

Total

17,571,476

Common Stocks (continued)

Issuer

Shares

Value ($)

Office REITs 0.6%

Douglas Emmett, Inc.

240,135

2,775,961

Easterly Government Properties, Inc.

63,167

1,549,487

Highwoods Properties, Inc.

158,106

4,838,044

JBG SMITH Properties

83,526

1,006,488

SL Green Realty Corp.

101,975

5,708,560

Total

15,878,540

Real Estate Management & Development 0.4%

AGNT, Inc.

134,294

553,291

Cushman & Wakefield Ltd.(a)

335,934

4,531,750

Marcus & Millichap, Inc.

33,609

1,064,061

St. Joe Co. (The)

56,796

3,754,215

Total

9,903,317

Residential REITs 0.1%

Centerspace

24,092

1,264,589

NexPoint Residential Trust, Inc.

31,431

745,229

Total

2,009,818

Retail REITs 1.7%

Acadia Realty Trust

191,433

3,918,634

Curbline Properties Corp.

139,213

4,152,724

Getty Realty Corp.

79,760

2,585,819

InvenTrust Properties Corp.

111,742

3,610,384

Macerich Co. (The)

406,418

9,599,593

NetSTREIT Corp.

139,450

2,839,202

Phillips Edison & Co., Inc.

180,655

6,982,316

Saul Centers, Inc.

17,941

585,056

Tanger, Inc.

164,706

6,211,063

Urban Edge Properties

180,684

3,823,273

Total

44,308,064

Specialized REITs 0.7%

Four Corners Property Trust, Inc.

157,355

3,914,993

Millrose Properties, Inc.

221,127

6,726,683

Outfront Media, Inc.

219,619

6,452,406

Safehold, Inc.

65,710

994,849

Total

18,088,931

Total Real Estate

167,199,053

The accompanying Notes to Financial Statements are an integral part of this statement.

12

Columbia Small Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Utilities 2.0%

Electric Utilities 0.5%

Hawaiian Electric Industries, Inc.(a)

247,520

2,777,174

MGE Energy, Inc.

54,120

4,204,583

Otter Tail Corp.

60,195

5,445,842

Total

12,427,599

Gas Utilities 0.5%

Chesapeake Utilities Corp.

34,418

4,596,180

MDU Resources Group, Inc.

299,666

5,969,347

Northwest Natural Holding Co.

60,334

2,960,589

Total

13,526,116

Independent Power and Renewable Electricity Producers 0.2%

Clearway Energy, Inc., Class C

173,727

5,515,832

Multi-Utilities 0.2%

Avista Corp.

118,484

4,402,866

Unitil Corp.

25,795

1,381,064

Total

5,783,930

Water Utilities 0.6%

American States Water Co.

56,195

5,017,651

California Water Service Group

85,815

4,288,176

H2O America

56,390

3,573,434

Middlesex Water Co.

26,703

1,548,774

Total

14,428,035

Total Utilities

51,681,512

Total Common Stocks

(Cost $1,682,899,138)

2,564,870,577

Exchange-Traded Equity Funds 0.7%

Shares

Value ($)

U.S. Small Cap 0.7%

iShares Core S&P Small-Cap ETF

132,533

19,153,669

Total Exchange-Traded Equity Funds

(Cost $12,206,753)

19,153,669

Rights —%

Issuer

Shares

Value ($)

Health Care —%

Life Sciences Tools & Services —%

OmniAb Operations, Inc.(a),(b),(c),(d)

23,460

0

OmniAb, Inc.(a),(b),(c),(d)

23,460

0

Total

0

Total Health Care

0

Total Rights

(Cost $—)

0

Money Market Funds 0.8%

Shares

Value ($)

Columbia Short-Term Cash Fund, 3.871%(e),(f)

21,511,664

21,500,909

Total Money Market Funds

(Cost $21,497,615)

21,500,909

Total Investments in Securities

(Cost: $1,716,603,506)

2,605,525,155

Other Assets & Liabilities, Net

(551,334

)

Net Assets

2,604,973,821

At August 31, 2026, securities and/or cash totaling $2,027,950 were pledged as collateral.

Investments in derivatives 

Long futures contracts

Description

Number of

contracts

Expiration

date

Trading

currency

Notional

amount

Value/Unrealized

appreciation ($)

Value/Unrealized

depreciation ($)

Russell 2000 Index E-mini

172

09/2026

USD

25,444,820

—

(37,764

)

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Index Fund  | 2026

13


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Notes to Portfolio of Investments 

(a)

Non-income producing investment.

(b)

Represents fair value as determined in good faith under procedures approved by the Board of Trustees. At August 31, 2026, the total value of these securities amounted to $0, which represents less than 0.01% of total net assets.

(c)

Denotes a restricted security, which is subject to legal or contractual restrictions on resale under federal securities laws. Disposal of a restricted investment may involve time-consuming negotiations and expenses, and prompt sale at an acceptable price may be difficult to achieve. Private placement securities are generally considered to be restricted, although certain of those securities may be traded between qualified institutional investors under the provisions of Section 4(a)(2) and Rule 144A. The Fund will not incur any registration costs upon such a trade. At August 31, 2026, the total market value of these securities amounted to $0, which represents less than 0.01% of total net assets. Additional information on these securities is as follows:

Security

Acquisition

Dates

Shares

Cost ($)

Value ($)

OmniAb Operations, Inc.

09/03/2021

23,460

—

—

OmniAb, Inc.

09/03/2021

23,460

—

—

—

—

(d)

Valuation based on significant unobservable inputs.

(e)

The rate shown is the seven-day current annualized yield at August 31, 2026.

(f)

Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The values of the holdings and transactions in these affiliated companies during the period ended August 31, 2026 are as follows:

Affiliated issuers

Beginning

of period($)

Purchases($)

Sales($)

Net change in

unrealized

appreciation

(depreciation)($)

End of

period($)

Realized gain

(loss)($)

Dividends($)

End of

period shares

Columbia Short-Term Cash Fund, 3.871%

23,662,566

270,140,093

(272,302,566

)

816

21,500,909

(9,525

)

532,429

21,511,664

Abbreviation Legend 

ADR

American Depositary Receipt

Currency Legend 

USD

US Dollar

Fair value measurements  

The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.

Fair value inputs are summarized in the three broad levels listed below:

■

 Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date.  Valuation adjustments are not applied to Level 1 investments.

■

 Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).

■

 Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).

Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by Columbia Management Investment Advisers, LLC (the Investment Manager), along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.

The accompanying Notes to Financial Statements are an integral part of this statement.

14

Columbia Small Cap Index Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Fair value measurements   (continued)

Investments falling into the Level 3 category, if any, are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.

The Fund’s Board of Trustees (the Board) has designated the Investment Manager, through its Valuation Committee (the Committee), as valuation designee, responsible for determining the fair value of the assets of the Fund for which market quotations are not readily available using valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.

The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third-party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third-party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. Representatives of the Investment Manager report to the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.

The following table is a summary of the inputs used to value the Fund’s investments at August 31, 2026: 

Level 1 ($)

Level 2 ($)

Level 3 ($)

Total ($)

Investments in Securities

Common Stocks

Communication Services

89,641,910

—

—

89,641,910

Consumer Discretionary

356,549,671

—

—

356,549,671

Consumer Staples

92,067,930

—

—

92,067,930

Energy

159,478,860

—

—

159,478,860

Financials

489,950,824

—

—

489,950,824

Health Care

281,200,066

—

—

281,200,066

Industrials

446,981,357

—

—

446,981,357

Information Technology

319,434,976

—

—

319,434,976

Materials

110,684,418

—

—

110,684,418

Real Estate

167,199,053

—

—

167,199,053

Utilities

51,681,512

—

—

51,681,512

Total Common Stocks

2,564,870,577

—

—

2,564,870,577

Exchange-Traded Equity Funds

19,153,669

—

—

19,153,669

Rights

Health Care

—

—

0

*

0

*

Total Rights

—

—

0

*

0

*

Money Market Funds

21,500,909

—

—

21,500,909

Total Investments in Securities

2,605,525,155

—

0

*

2,605,525,155

Investments in Derivatives

Liability

Futures Contracts

(37,764

)

—

—

(37,764

)

Total

2,605,487,391

—

0

*

2,605,487,391

*

Rounds to zero.

See the Portfolio of Investments for all investment classifications not indicated in the table.

Derivative instruments are valued at unrealized appreciation (depreciation).

The Fund does not hold any significant investments (greater than one percent of net assets) categorized as Level 3.

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Index Fund  | 2026

15


Statement of Assets and Liabilities

August 31, 2026 (Unaudited)

Assets

Investments in securities, at value

Unaffiliated issuers (cost $1,695,105,891)

$2,584,024,246

Affiliated issuers (cost $21,497,615)

21,500,909

Margin deposits on:

Futures contracts

2,027,950

Receivable for:

Capital shares sold

1,036,370

Dividends

2,188,731

Foreign tax reclaims

14,383

Expense reimbursement due from Investment Manager

267

Total assets

2,610,792,856

Liabilities

Payable for:

Capital shares redeemed

5,149,753

Variation margin for futures contracts

171,405

Management services fees

43,194

Distribution and/or service fees

14,088

Compensation of board members

3,905

Deferred compensation of board members

436,690

Total liabilities

5,819,035

Net assets applicable to outstanding capital stock

$2,604,973,821

Represented by

Paid in capital

1,526,469,178

Total distributable earnings (loss)

1,078,504,643

Total - representing net assets applicable to outstanding capital stock

$2,604,973,821

Class A

Net assets

$680,190,604

Shares outstanding

28,343,111

Net asset value per share

$24.00

Institutional Class

Net assets

$1,110,716,538

Shares outstanding

45,515,427

Net asset value per share

$24.40

Institutional 2 Class

Net assets

$557,865,275

Shares outstanding

21,861,692

Net asset value per share

$25.52

Institutional 3 Class

Net assets

$256,201,404

Shares outstanding

11,053,471

Net asset value per share

$23.18

The accompanying Notes to Financial Statements are an integral part of this statement.

16

Columbia Small Cap Index Fund  | 2026


Statement of Operations

Six Months Ended August 31, 2026 (Unaudited)

Net investment income

Income:

Dividends — unaffiliated issuers

$21,000,838

Dividends — affiliated issuers

532,429

Foreign taxes withheld

(20,293

)

Total income

21,512,974

Expenses:

Management services fees

2,608,586

Distribution and/or service fees

Class A

861,781

Interest on collateral

225

Compensation of board members

17,095

Deferred compensation of board members

47,838

Total expenses

3,535,525

Fees waived or expenses reimbursed by Investment Manager and its affiliates

(64,933

)

Total net expenses

3,470,592

Net investment income

18,042,382

Realized and unrealized gain (loss) — net

Net realized gain (loss) on:

Investments — unaffiliated issuers

189,193,308

Investments — affiliated issuers

(9,525

)

Futures contracts

3,256,954

Net realized gain

192,440,737

Net change in unrealized appreciation (depreciation) on:

Investments — unaffiliated issuers

75,318,375

Investments — affiliated issuers

816

Futures contracts

(779,552

)

Net change in unrealized appreciation (depreciation)

74,539,639

Net realized and unrealized gain

266,980,376

Net increase in net assets resulting from operations

$285,022,758

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Index Fund  | 2026

17


Statement of Changes in Net Assets

Six Months Ended

August 31, 2026

(Unaudited)

Year Ended

February 28, 2026

Operations

Net investment income

$18,042,382

$30,808,633

Net realized gain

192,440,737

350,736,769

Net change in unrealized appreciation (depreciation)

74,539,639

29,723,994

Net increase in net assets resulting from operations

285,022,758

411,269,396

Distributions to shareholders

Net investment income and net realized gains

Class A

(45,184,675

)

(76,203,165

)

Institutional Class

(70,420,045

)

(118,598,367

)

Institutional 2 Class

(35,451,584

)

(63,359,440

)

Institutional 3 Class

(18,007,670

)

(32,065,383

)

Total distributions to shareholders

(169,063,974

)

(290,226,355

)

Decrease in net assets from capital stock activity

(58,092,502

)

(319,034,419

)

Total increase (decrease) in net assets

57,866,282

(197,991,378

)

Net assets at beginning of period

2,547,107,539

2,745,098,917

Net assets at end of period

$2,604,973,821

$2,547,107,539

Six Months Ended

Year Ended

August 31, 2026 (Unaudited)

February 28, 2026

Shares

Dollars ($)

Shares

Dollars ($)

Capital stock activity

Class A

Shares sold

1,909,957

45,585,708

3,441,134

73,493,780

Distributions reinvested

1,649,768

39,297,472

3,056,047

64,871,532

Shares redeemed

(4,588,000

)

(108,960,026

)

(10,281,174

)

(221,973,112

)

Net decrease

(1,028,275

)

(24,076,846

)

(3,783,993

)

(83,607,800

)

Institutional Class

Shares sold

2,908,164

70,809,213

5,265,161

113,466,411

Distributions reinvested

2,704,718

65,481,230

5,148,330

110,899,267

Shares redeemed

(5,191,097

)

(124,914,482

)

(13,471,417

)

(297,010,631

)

Net increase (decrease)

421,785

11,375,961

(3,057,926

)

(72,644,953

)

Institutional 2 Class

Shares sold

1,663,218

42,161,223

5,787,511

130,124,820

Distributions reinvested

1,275,864

32,304,862

2,570,200

57,539,963

Shares redeemed

(4,073,453

)

(102,772,844

)

(13,441,883

)

(308,569,643

)

Net decrease

(1,134,371

)

(28,306,759

)

(5,084,172

)

(120,904,860

)

Institutional 3 Class

Shares sold

961,392

22,334,771

4,022,276

80,216,914

Distributions reinvested

322,115

7,408,654

575,821

11,865,543

Shares redeemed

(2,061,822

)

(46,828,283

)

(6,644,865

)

(133,959,263

)

Net decrease

(778,315

)

(17,084,858

)

(2,046,768

)

(41,876,806

)

Total net decrease

(2,519,176

)

(58,092,502

)

(13,972,859

)

(319,034,419

)

The accompanying Notes to Financial Statements are an integral part of this statement.

18

Columbia Small Cap Index Fund  | 2026


[THIS PAGE INTENTIONALLY LEFT BLANK]

Columbia Small Cap Index Fund  | 2026

19


Financial Highlights

The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The ratios of expenses and net investment income are annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher. A zero balance may reflect an amount rounding to less than $0.01 or 0.01%. 

Net asset value,

beginning of

period

Net

investment

income

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class A

Six Months Ended 8/31/2026 (Unaudited)

$22.96

0.15

2.53

2.68

—

(1.64

)

(1.64

)

Year Ended 2/28/2026

$21.98

0.22

3.33

3.55

(0.24

)

(2.33

)

(2.57

)

Year Ended 2/28/2025

$23.97

0.25

1.32

1.57

(0.29

)

(3.27

)

(3.56

)

Year Ended 2/29/2024

$23.91

0.28

1.05

1.33

(0.30

)

(0.97

)

(1.27

)

Year Ended 2/28/2023

$27.52

0.26

(1.51

)

(1.25

)

(0.28

)

(2.08

)

(2.36

)

Year Ended 2/28/2022

$28.74

0.25

0.90

1.15

(0.27

)

(2.10

)

(2.37

)

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$23.31

0.18

2.56

2.74

(0.01

)

(1.64

)

(1.65

)

Year Ended 2/28/2026

$22.26

0.28

3.39

3.67

(0.29

)

(2.33

)

(2.62

)

Year Ended 2/28/2025

$24.23

0.31

1.35

1.66

(0.36

)

(3.27

)

(3.63

)

Year Ended 2/29/2024

$24.15

0.34

1.07

1.41

(0.36

)

(0.97

)

(1.33

)

Year Ended 2/28/2023

$27.77

0.32

(1.53

)

(1.21

)

(0.33

)

(2.08

)

(2.41

)

Year Ended 2/28/2022

$28.96

0.33

0.91

1.24

(0.33

)

(2.10

)

(2.43

)

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$24.30

0.19

2.68

2.87

(0.01

)

(1.64

)

(1.65

)

Year Ended 2/28/2026

$23.10

0.29

3.53

3.82

(0.29

)

(2.33

)

(2.62

)

Year Ended 2/28/2025

$25.03

0.32

1.38

1.70

(0.36

)

(3.27

)

(3.63

)

Year Ended 2/29/2024

$24.90

0.35

1.11

1.46

(0.36

)

(0.97

)

(1.33

)

Year Ended 2/28/2023

$28.55

0.33

(1.57

)

(1.24

)

(0.33

)

(2.08

)

(2.41

)

Year Ended 2/28/2022

$29.71

0.34

0.93

1.27

(0.33

)

(2.10

)

(2.43

)

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$22.21

0.17

2.45

2.62

(0.01

)

(1.64

)

(1.65

)

Year Ended 2/28/2026

$21.33

0.27

3.23

3.50

(0.29

)

(2.33

)

(2.62

)

Year Ended 2/28/2025

$23.35

0.30

1.31

1.61

(0.36

)

(3.27

)

(3.63

)

Year Ended 2/29/2024

$23.33

0.33

1.02

1.35

(0.36

)

(0.97

)

(1.33

)

Year Ended 2/28/2023

$26.91

0.33

(1.50

)

(1.17

)

(0.33

)

(2.08

)

(2.41

)

Year Ended 2/28/2022

$28.13

0.32

0.89

1.21

(0.33

)

(2.10

)

(2.43

)

Notes to Financial Highlights

(a)

In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.

(b)

Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.

(c)

Ratios include interest on collateral expense which is less than 0.01%.

(d)

Ratios include interfund lending expense which is less than 0.01%.

(e)

The benefits derived from expense reductions had an impact of less than 0.01%.

The accompanying Notes to Financial Statements are an integral part of this statement.

20

Columbia Small Cap Index Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class A

Six Months Ended 8/31/2026 (Unaudited)

$24.00

11.74%

0.46%

(c)

0.45%

(c)

1.20%

15%

$680,191

Year Ended 2/28/2026

$22.96

17.44%

0.45%

(d)

0.45%

(d),(e)

1.03%

22%

$674,501

Year Ended 2/28/2025

$21.98

5.81%

0.45%

(d)

0.45%

(d),(e)

1.02%

23%

$728,698

Year Ended 2/29/2024

$23.97

6.02%

0.45%

(c),(d)

0.45%

(c),(d),(e)

1.25%

29%

$824,702

Year Ended 2/28/2023

$23.91

(3.93%

)

0.45%

(c),(d)

0.45%

(c),(d),(e)

1.06%

16%

$913,784

Year Ended 2/28/2022

$27.52

3.62%

0.45%

(c)

0.45%

(c),(e)

0.84%

13%

$1,070,943

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$24.40

11.82%

0.21%

(c)

0.20%

(c)

1.45%

15%

$1,110,717

Year Ended 2/28/2026

$23.31

17.77%

0.20%

(d)

0.20%

(d),(e)

1.27%

22%

$1,050,952

Year Ended 2/28/2025

$22.26

6.09%

0.20%

(d)

0.20%

(d),(e)

1.26%

23%

$1,071,688

Year Ended 2/29/2024

$24.23

6.30%

0.20%

(c),(d)

0.20%

(c),(d),(e)

1.50%

29%

$1,108,362

Year Ended 2/28/2023

$24.15

(3.72%

)

0.20%

(c),(d)

0.20%

(c),(d),(e)

1.29%

16%

$1,226,987

Year Ended 2/28/2022

$27.77

3.92%

0.20%

(c)

0.20%

(c),(e)

1.09%

13%

$1,763,233

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$25.52

11.87%

0.20%

(c)

0.20%

(c)

1.45%

15%

$557,865

Year Ended 2/28/2026

$24.30

17.77%

0.20%

(d)

0.20%

(d)

1.27%

22%

$558,860

Year Ended 2/28/2025

$23.10

6.05%

0.20%

(d)

0.20%

(d)

1.27%

23%

$648,734

Year Ended 2/29/2024

$25.03

6.31%

0.20%

(c),(d)

0.20%

(c),(d)

1.49%

29%

$993,642

Year Ended 2/28/2023

$24.90

(3.73%

)

0.20%

(c),(d)

0.20%

(c),(d)

1.31%

16%

$1,045,399

Year Ended 2/28/2022

$28.55

3.92%

0.20%

(c)

0.20%

(c)

1.09%

13%

$1,199,980

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$23.18

11.86%

0.20%

(c)

0.20%

(c)

1.45%

15%

$256,201

Year Ended 2/28/2026

$22.21

17.75%

0.20%

(d)

0.20%

(d)

1.27%

22%

$262,795

Year Ended 2/28/2025

$21.33

6.10%

0.20%

(d)

0.20%

(d)

1.27%

23%

$295,979

Year Ended 2/29/2024

$23.35

6.26%

0.20%

(c),(d)

0.20%

(c),(d)

1.50%

29%

$327,477

Year Ended 2/28/2023

$23.33

(3.69%

)

0.20%

(c),(d)

0.20%

(c),(d)

1.41%

16%

$308,297

Year Ended 2/28/2022

$26.91

3.93%

0.20%

(c)

0.20%

(c)

1.09%

13%

$90,933

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Index Fund  | 2026

21


Notes to Financial Statements

August 31, 2026 (Unaudited)

Note 1. Organization

Columbia Small Cap Index Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

Fund shares

The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different net investment income distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.

As described in the Fund’s prospectus, Class A shares are offered to the general public for investment. Institutional Class, Institutional 2 Class and Institutional 3 Class shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.

Note 2. Summary of significant accounting policies

Basis of preparation

The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification (Topic 946), Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which require management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

Segment reporting

The intent of FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures is to enable investors to better understand an entity’s overall performance and to assess its potential future cash flows through improved segment disclosures. The chief operating decision maker (CODM) for the Fund is Columbia Management Investment Advisers, LLC through its Investment Oversight Committee and Global Executive Group, which are responsible for assessing performance and making decisions about resource allocation. The CODM has determined that the Fund has a single operating segment because the CODM monitors the operating results of the Fund as a whole and the Fund’s long-term strategic asset allocation is pre-determined in accordance with the terms of its prospectus, based on a defined investment strategy which is executed by the Fund’s portfolio managers as a team. The financial information provided to and reviewed by the CODM is consistent with that presented within the Fund’s financial statements.

Security valuation

Equity securities listed on an exchange are valued at the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. Securities with a closing price not readily available or not listed on any exchange are valued at the mean between the closing bid and ask prices. Listed preferred stocks convertible into common stocks are valued using an evaluated price from a pricing service.

22

Columbia Small Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Foreign equity securities are valued based on the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy approved by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including relevant general and sector indices, currency fluctuations, depositary receipts, and futures, as applicable, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.

Investments in open-end investment companies (other than exchange-traded funds (ETFs)) are valued at the latest net asset value reported by those companies as of the valuation time. 

Futures and options on futures contracts are valued based upon the settlement price at the close of regular trading on their principal exchanges or, in the absence of a settlement price, at the mean of the latest quoted bid and ask prices.

Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.

The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.

GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.

Derivative instruments

The Fund invests in certain derivative instruments, as detailed below, in seeking to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional exposure of a financial instrument is the nominal or face amount that is used to calculate payments made on that instrument and/or changes in value for the instrument. The notional exposure is a hypothetical underlying quantity upon which payment obligations are computed. Notional exposures provide a gauge for how the Fund may behave given changes in the underlying rate, asset or reference instrument and individual markets. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.

A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally expected to be limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With

Columbia Small Cap Index Fund  | 2026

23


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty provides some protection in the case of clearing member default. The clearinghouse stands between the buyer and the seller of the contract; therefore, the primary counterparty credit risk is the risk of failure of the clearinghouse. However, credit risk still exists in exchange-traded and centrally cleared derivatives with respect to any collateral that is held in a broker’s customer accounts. While clearing brokers are required to segregate customer margin from their own assets, in the event that a clearing broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the clearing broker for all its clients and such shortfall is not remedied by the central counterparty or otherwise, U.S. bankruptcy laws will typically allocate that shortfall on a pro rata basis across all the clearing broker’s customers (including the Fund) by account class, potentially resulting in losses to the Fund.

In connection with certain over-the-counter derivatives, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and forward foreign currency exchange contracts and contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instruments’ payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.

Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or central counterparty for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms for most over-the-counter derivatives are subject to regulatory requirements to exchange variation margin with trading counterparties and may have contract specific margin terms as well. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker or receive interest income on cash collateral pledged to the broker. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.

Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty.  The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement.  In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.

For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.

Futures contracts

Futures contracts are exchange-traded and represent commitments for the future purchase or sale of an asset at a specified price on a specified date. The Fund bought and sold futures contracts to manage its exposure to the securities markets or to movements in interest rates and currency values. A Fund invests in futures contracts as part of its primary investment strategy and/or to equitize its cash flows. Investments in futures contracts may increase or decrease exposure to a particular market. These instruments may be used for other purposes in future periods. Upon entering into futures

24

Columbia Small Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

contracts, the Fund bears risks that it may not achieve the anticipated benefits of the futures contracts and may realize a loss. Additional risks include counterparty credit risk, the possibility of an illiquid market, and that a change in the value of the contract or option may not correlate with changes in the value of the underlying asset.

Upon entering into a futures contract, the Fund deposits cash or securities with the broker, known as a futures commission merchant (FCM), in an amount sufficient to meet the initial margin requirement. The initial margin deposit must be maintained at an established level over the life of the contract. Cash deposited as initial margin is recorded in the Statement of Assets and Liabilities as margin deposits. Securities deposited as initial margin are designated in the Portfolio of Investments. Subsequent payments (variation margin) are made or received by the Fund each day. The variation margin payments are equal to the daily change in the contract value and are recorded as variation margin receivable or payable and are offset in unrealized gains or losses. The Fund generally expects to earn interest income on its margin deposits. The Fund recognizes a realized gain or loss when the contract is closed or expires. Futures contracts involve, to varying degrees, risk of loss in excess of the variation margin disclosed in the Statement of Assets and Liabilities.

Effects of derivative transactions in the financial statements

The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.

The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at August 31, 2026: 

Liability derivatives

Risk exposure

category

Statement

of assets and liabilities

location

Fair value ($)

Equity risk

Component of total distributable earnings (loss) — unrealized depreciation on futures contracts

37,764

*

*

Includes cumulative appreciation (depreciation) as reported in the tables following the Portfolio of Investments. Only the current day’s variation margin for futures and centrally cleared swaps, if any, is reported in receivables or payables in the Statement of Assets and Liabilities.

The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the six months ended August 31, 2026: 

Amount of realized gain (loss) on derivatives recognized in income

Risk exposure category

Futures

contracts

($)

Equity risk

3,256,954

Change in unrealized appreciation (depreciation) on derivatives recognized in income

Risk exposure category

Futures

contracts

($)

Equity risk

(779,552

)

The following table is a summary of the average daily outstanding volume by derivative instrument for the six months ended August 31, 2026: 

Derivative instrument

Average notional

amounts ($)

Futures contracts — long

34,016,210

Columbia Small Cap Index Fund  | 2026

25


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Security transactions

Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.

Income recognition

Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of an ex-dividend notification in the case of certain foreign securities.

The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.

Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.

Expenses

General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.

Determination of class net asset value

All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.

Federal income tax status

The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.

Foreign taxes

The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability in the Statement of Assets and Liabilities.

26

Columbia Small Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Distributions to shareholders

Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.

Guarantees and indemnifications

Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.

Note 3. Fees and other transactions with affiliates

Management services fees

The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice and is responsible for administrative and accounting services. The management services fee is an annual fee that is equal to 0.20% of the Fund’s daily net assets.

The Investment Manager, from the management services fee it receives from the Fund, pays all operating expenses of the Fund, with the exception of brokerage fees and commissions, taxes, interest, fees and expenses of Board of Trustees who are not officers, directors or employees of the Investment Manager or its affiliates, distribution and/or shareholder servicing and any extraordinary non-recurring expenses that may arise, including litigation fees.

Compensation of Board members

Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund. The expense for the Deferred Plan, which includes Trustees’ fees deferred during the current period as well as any gains or losses on the Trustees’ deferred compensation balances as a result of market fluctuations, is included in "Deferred compensation of board members" in the Statement of Operations.

Compensation of Chief Compliance Officer

The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. A portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets. The expenses of the Chief Compliance Officer allocated to the Fund are payable by the Investment Manager.

Transfer agency fees

Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with SS&C GIDS, Inc. (SS&C GIDS) to serve as sub-transfer agent.

Columbia Small Cap Index Fund  | 2026

27


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

The transfer agency fees are payable by the Investment Manager. The Transfer Agent pays the fees of SS&C GIDS for services as sub-transfer agent and SS&C GIDS is not entitled to reimbursement for such fees from the Fund. The Transfer Agent also receives compensation from the Investment Manager for various shareholder services and reimbursements for certain out-of-pocket expenses.

An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the six months ended August 31, 2026, no minimum account balance fees were charged by the Fund.

Distribution and service fees

The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, a distribution and shareholder service plan (the Plan) applicable to Class A shares, which sets the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.

Under the Plan, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund.

Expenses waived/reimbursed by the Investment Manager and its affiliates

The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the classes’ average daily net assets: 

Fee rate(s) contractual

through

June 30, 2027 (%)

Class A

0.45

Institutional Class

0.20

Institutional 2 Class

0.20

Institutional 3 Class

0.20

Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, costs associated with shareholder meetings, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.

Note 4. Federal tax information

The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.

28

Columbia Small Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

At August 31, 2026, the approximate cost of all investments for federal income tax purposes and the aggregate gross approximate unrealized appreciation and depreciation based on that cost was: 

Federal

tax cost ($)

Gross unrealized

appreciation ($)

Gross unrealized

(depreciation) ($)

Net unrealized

appreciation ($)

1,716,604,000

1,080,082,000

(191,199,000

)

888,883,000

Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.

Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.

Note 5. Portfolio information

The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $385,670,474 and $591,408,641, respectively, for the six months ended August 31, 2026. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.

Note 6. Affiliated money market fund

The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. The Securities and Exchange Commission has adopted amendments to money market fund rules requiring institutional prime money market funds like the Affiliated MMF to be subject to a discretionary liquidity fee of up to 2% if the imposition of such a fee is determined to be in the best interest of the Affiliated MMF and to a mandatory liquidity fee if daily net redemptions exceed 5% of net assets.

Note 7. Interfund lending

Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.

Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.

The Fund did not borrow or lend money under the Interfund Program during the six months ended August 31, 2026.

Note 8. Line of credit

Effective October 22, 2026, the Fund has access to a revolving credit facility with a syndicate of banks led by State Street Bank and Trust Company, Citibank, N.A. and Wells Fargo Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is an agreement between the Fund and certain other funds managed by the Investment Manager, severally and not jointly, permits aggregate borrowings up to $750 million. Interest is currently charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate and (ii) the overnight bank funding rate, plus 1.00% in each case.

Columbia Small Cap Index Fund  | 2026

29


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in October unless extended or renewed. Prior to October 22, 2026, the Fund had access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A., which permitted aggregate borrowings up to $750 million. Interest was charged to each participating fund based on its borrowings at a rate equal to the highest of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case.

The Fund had no borrowings during the six months ended August 31, 2026.

Note 9. Risks and uncertainties

An investment in the Fund involves risks, including market risk and concentration risk, among others. The value of the Fund’s holdings and the Fund’s net asset value may go down. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally.

Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, other conflicts, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.

To the extent that the Fund concentrates its investment in particular issuers, countries, geographic regions, industries or sectors, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of issuers, countries, geographic regions, industries, sectors or investments.

Additional risk factors of the Fund are described more fully in the Fund’s Prospectus and Statement of Additional Information.

Shareholder concentration risk

At August 31, 2026, affiliated shareholders of record owned 21.2% of the outstanding shares of the Fund in one or more accounts. Fund shares sold to or redeemed by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.

Note 10. Subsequent events

Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.

Note 11. Information regarding pending and settled legal proceedings

Ameriprise Financial and certain of its affiliates are involved, in the normal course of business, in legal proceedings that include regulatory inquiries, arbitration and litigation (including class actions) concerning matters arising in connection with the conduct of their activities as part of a diversified financial services firm. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make

30

Columbia Small Cap Index Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.

There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, it is inherently difficult to determine whether any loss is probable or even reasonably possible, or to reasonably estimate the amount of any loss that may result from such matters. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief, and may lead to further claims, examinations, adverse publicity or reputational damage, each of which could have a material adverse effect on the consolidated financial condition or results of operations or financial condition of Ameriprise Financial or one or more of its affiliates that provide services to the Fund.

Columbia Small Cap Index Fund  | 2026

31


 Approval of Management Agreement

(Unaudited)

Columbia Management Investment Advisers, LLC (the Investment Manager, and together with its domestic and global affiliates, Columbia Threadneedle Investments), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial), serves as the investment manager to Columbia Small Cap Index Fund (the Fund). Under a management agreement (the Management Agreement), the Investment Manager provides investment advice and other services to the Fund.  The Investment Manager also provides investment advice and other services to other funds in the Columbia Fund family (collectively, the Funds).

On an annual basis, the Fund’s Board of Trustees (the Board), including the independent Board members (the Independent Trustees), considers renewal of the Management Agreement.  The Investment Manager prepared detailed reports for the Board and its Contracts Committee (including its Contracts Subcommittee) in March, April and June 2026, including reports providing the results of analyses performed by a third-party data provider, Broadridge Financial Solutions, Inc. (Broadridge), and comprehensive responses by the Investment Manager to written requests for information by independent legal counsel to the Independent Trustees (Independent Legal Counsel), to assist the Board in making this determination.  In addition, throughout the year, the Board (or its committees or subcommittees) regularly meets with portfolio management teams and senior management personnel and reviews information prepared by the Investment Manager addressing the services the Investment Manager provides and Fund performance.  The Board also accords appropriate weight to the work, deliberations and conclusions of the various committees (including their subcommittees), such as the Contracts Committee, the Investment Review Committee, the Audit Committee and the Compliance Committee, in determining whether to continue the Management Agreement.

The Board, at its June 18, 2026 Board meeting (the June Meeting), considered the renewal of the Management Agreement for an additional one-year term.  At the June Meeting, Independent Legal Counsel reviewed with the Independent Trustees various factors relevant to the Board’s consideration of advisory agreements and the Board’s legal responsibilities related to such consideration.  The Independent Trustees considered such information as they, their legal counsel or the Investment Manager believed reasonably necessary to evaluate and to approve the continuation of the Management Agreement. Among other things, the information and factors considered included the following:

•

Information on the investment performance of the Fund relative to the performance of a group of mutual funds determined to be comparable to the Fund by Broadridge, as well as performance relative to one or more benchmarks; 

•

Information on the Fund’s management fees and total expenses, including information comparing the Fund’s expenses to those of a group of comparable mutual funds, as determined by Broadridge; 

•

The Investment Manager’s agreement to contractually limit or cap total operating expenses for the Fund so that total operating expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses and infrequent and/or unusual expenses) would not exceed a specified annual rate, as a percentage of the Fund’s net assets;

•

Terms of the Management Agreement;

•

Descriptions of other agreements and arrangements with affiliates of the Investment Manager relating to the operations of the Fund, including agreements with respect to the provision of transfer agency and shareholder services to the Fund;

•

Descriptions of various services performed by the Investment Manager under the Management Agreement, including portfolio management and portfolio trading practices;

•

Information regarding any recently negotiated management fees of similarly-managed portfolios of other institutional clients of the Investment Manager;

•

Information regarding the resources of the Investment Manager, including information regarding senior management, portfolio managers and other personnel;

•

Information regarding the capabilities of the Investment Manager with respect to compliance monitoring services; 

•

The profitability to the Investment Manager and its affiliates from their relationships with the Fund; and

32

Columbia Small Cap Index Fund  | 2026


Approval of Management Agreement (continued)

(Unaudited)

•

Report provided by the Board’s independent fee consultant, JDL Consultants, LLC (JDL).

Following an analysis and discussion of the foregoing, and the factors identified below, the Board, including all of the Independent Trustees, approved the renewal of the Management Agreement.

Nature, extent and quality of services provided by the Investment Manager

The Board analyzed various reports and presentations it had received detailing the services performed by the Investment Manager, as well as its history, expertise, resources and relative capabilities, and the qualifications of its personnel.

The Board specifically considered the many developments during recent years concerning the services provided by the Investment Manager. Among other things, the Board noted the organization and depth of the equity and credit research departments. The Board further observed the enhancements to the investment risk management department’s processes, systems and oversight over the past several years.  The Board also took into account the broad scope of services provided by the Investment Manager to the Fund, including, among other services, investment, risk and compliance oversight.  The Board also took into account the information it received concerning the Investment Manager’s ability to attract and retain key portfolio management personnel and that it has sufficient resources to provide competitive and adequate compensation to investment personnel.

In connection with the Board’s evaluation of the overall package of services provided by the Investment Manager, the Board also considered the nature, quality and range of administrative services provided to the Fund by the Investment Manager, as well as the achievements in 2025 in the performance of administrative services, and noted the various enhancements anticipated for 2026.  In evaluating the quality of services provided under the Management Agreement, the Board also took into account the organization and strength of the Fund’s and its service providers’ compliance programs.  The Board also reviewed the financial condition of the Investment Manager and its affiliates and each entity’s ability to carry out its responsibilities under the Management Agreement and the Fund’s other service agreements.

In addition, the Board discussed the acceptability of the terms of the Management Agreement, noting that no changes were proposed from the form of agreement previously approved.  The Board also noted the wide array of legal and compliance services provided to the Fund under the Management Agreement.

After reviewing these and related factors (including investment performance as discussed below), the Board concluded, within the context of its overall conclusions, that the nature, extent and quality of the services provided to the Fund under the Management Agreement supported the continuation of the Management Agreement.

Investment performance

The Board carefully reviewed the investment performance of the Fund, including detailed reports providing the results of analyses performed by each of the Investment Manager, Broadridge and JDL collectively showing, for various periods (including since manager inception): (i) the performance of the Fund, (ii) the Fund’s performance relative to peers and benchmarks, (iii) the net assets of the Fund and (iv) index tracking error data of the Fund. The Board observed that the Fund’s tracking error versus its performance was within the range of management’s expectations.

The Board also reviewed a description of the third-party data provider’s methodology for identifying the Fund’s peer groups for purposes of performance and expense comparisons. 

The Board also considered the Investment Manager’s performance and reputation generally.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the performance of the Fund and the Investment Manager, in light of other considerations, supported the continuation of the Management Agreement. 

Columbia Small Cap Index Fund  | 2026

33


Approval of Management Agreement (continued)

(Unaudited)

Comparative fees, costs of services provided and the profits realized by the Investment Manager and its affiliates from their relationships with the Fund

The Board reviewed comparative fees and the costs of services provided under the Management Agreement.  The Board members considered detailed comparative information set forth in an annual report on fees and expenses, including, among other things, data (based on analyses conducted by Broadridge and JDL) showing a comparison of the Fund’s expenses with median expenses paid by funds in its comparative peer universe, as well as data showing the Fund’s contribution to the Investment Manager’s profitability. 

The Board considered the reports of JDL, which assisted in the Board’s analysis of the Funds’ performance and expenses and the reasonableness of the Funds’ fee rates.  The Board accorded particular weight to the notion that a primary objective of the level of fees is to achieve a rational pricing model applied consistently across the various product lines in the Fund family, while assuring that the overall fees for each Fund (with certain exceptions) are generally in line with the current “pricing philosophy” such that Fund total expense ratios, in general, approximate or are lower than the median expense ratios of funds in the same Lipper comparison universe.  The Board took into account that the Fund’s total expense ratio (after considering proposed expense caps/waivers) was below the peer universe’s median expense ratio shown in the reports. 

After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the levels of management fees and expenses of the Fund, in light of other considerations, supported the continuation of the Management Agreement.

The Board also considered the profitability of the Investment Manager and its affiliates in connection with the Investment Manager providing management services to the Fund.  With respect to the profitability of the Investment Manager and its affiliates, the Independent Trustees referred to information discussing the profitability to the Investment Manager and Ameriprise Financial from managing, operating and distributing the Funds.  The Board considered that the profitability generated by the Investment Manager in 2025 had increased slightly from 2024 levels due to a variety of factors, including the increased assets under management of the Funds.  It also took into account the indirect economic benefits flowing to the Investment Manager or its affiliates in connection with managing or distributing the Funds, such as the enhanced ability to offer various other financial products to Ameriprise Financial customers, soft dollar benefits and overall reputational advantages.  The Board noted that the fees paid by the Fund should permit the Investment Manager to offer competitive compensation to its personnel, make necessary investments in its business and earn an appropriate profit.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the costs of services provided and the profitability to the Investment Manager and its affiliates from their relationships with the Fund supported the continuation of the Management Agreement.

Economies of scale

The Board considered the economies of scale that might be realized as the Fund’s net asset level grows and took note of the extent to which Fund shareholders might also benefit from such growth. The Board took into account, however, that the Management Agreement already provides for a relatively low flat fee regardless of the Fund’s asset level, and requires Columbia Threadneedle to provide investment advice, as well as administrative, accounting and other services to the Fund. 

Conclusion

The Board reviewed all of the above considerations in reaching its decision to approve the continuation of the Management Agreement.  In reaching its conclusions, no single factor was determinative. 

On June 18, 2026, the Board, including all of the Independent Trustees, determined that fees payable under the Management Agreement were fair and reasonable in light of the extent and quality of services provided and approved the renewal of the Management Agreement.

34

Columbia Small Cap Index Fund  | 2026


[THIS PAGE INTENTIONALLY LEFT BLANK]


Columbia Small Cap Index Fund

P.O. Box 219104

Kansas City, MO 64121-9104

  

Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.

Columbia Threadneedle Investments® (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.

© 2026 Columbia Management Investment Advisers, LLC.

columbiathreadneedleus.com/investor/

SAR228_(10/26)



  

Columbia Small Cap Value and Inflection Fund

Semi-Annual Financial Statements and Additional Information

August 31, 2026 (Unaudited)

Not FDIC or NCUA Insured

No Financial Institution Guarantee

May Lose Value


Table of Contents

Portfolio of Investments

3

Statement of Assets and Liabilities

8

Statement of Operations

9

Statement of Changes in Net Assets

10

Financial Highlights

12

Notes to Financial Statements

16

Approval of Management Agreement

25

Columbia Small Cap Value and Inflection Fund | 2026


Portfolio of Investments

August 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

Investments in securities

Common Stocks 99.2%

Issuer

Shares

Value ($)

Communication Services 2.5%

Entertainment 1.1%

Lionsgate Studios Corp.(a)

887,841

10,059,238

Media 1.4%

John Wiley & Sons, Inc., Class A

174,508

9,142,474

Magnite, Inc.(a)

147,057

3,454,369

Total

12,596,843

Total Communication Services

22,656,081

Consumer Discretionary 7.0%

Automobile Components 0.5%

Gentherm, Inc.(a)

113,857

4,473,441

Household Durables 2.0%

Cavco Industries, Inc.(a)

17,624

9,854,107

Newell Brands, Inc.

1,370,582

8,566,138

Total

18,420,245

Leisure Products 1.6%

Polaris, Inc.

216,220

13,954,839

Specialty Retail 1.6%

Urban Outfitters, Inc.(a)

123,460

9,961,987

Victoria’s Secret & Co.(a)

55,010

4,698,404

Total

14,660,391

Textiles, Apparel & Luxury Goods 1.3%

Carter’s, Inc.

109,950

3,561,280

Crocs, Inc.(a)

66,820

8,043,792

Total

11,605,072

Total Consumer Discretionary

63,113,988

Consumer Staples 4.1%

Food Products 1.3%

Cal-Maine Foods, Inc.

142,100

11,214,532

Household Products 2.4%

Central Garden & Pet Co., Class A(a)

259,969

9,673,446

Reynolds Consumer Products, Inc.

533,271

12,345,224

Total

22,018,670

Common Stocks (continued)

Issuer

Shares

Value ($)

Personal Care Products 0.4%

Edgewell Personal Care Co.

137,080

3,936,938

Total Consumer Staples

37,170,140

Energy 8.2%

Energy Equipment & Services 3.7%

Kodiak Gas Services, Inc.

121,258

7,126,333

National Energy Services Reunited Corp.(a)

308,410

10,828,275

Patterson-UTI Energy, Inc.

759,313

9,597,716

Solaris Energy Infrastructure, Inc., Class A

126,530

6,423,928

Total

33,976,252

Oil, Gas & Consumable Fuels 4.5%

California Resources Corp.

197,897

10,494,478

Gulfport Energy Corp.(a)

50,354

9,036,025

PBF Energy, Inc., Class A

134,240

9,798,178

Talos Energy, Inc.(a)

648,550

11,193,973

Total

40,522,654

Total Energy

74,498,906

Financials 21.5%

Banks 12.8%

Associated Banc-Corp.

487,480

14,921,763

Banc of California, Inc.

581,550

10,828,461

Bank of NT Butterfield & Son Ltd. (The)

149,002

8,773,238

BankUnited, Inc.

286,678

13,072,517

ConnectOne Bancorp, Inc.

164,950

5,186,028

Fulton Financial Corp.

642,813

15,080,393

Origin Bancorp, Inc.

106,030

5,633,374

Texas Capital Bancshares, Inc.

145,795

14,168,358

Trustmark Corp.

197,920

9,088,486

United Community Banks, Inc.

326,970

11,391,635

WaFd, Inc.

205,200

7,337,952

Total

115,482,205

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Value and Inflection Fund  | 2026

3


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Financial Services 4.5%

Bladex, Inc., Class E

135,930

7,329,345

Essent Group Ltd.

228,173

15,415,368

EVERTEC, Inc.

157,120

4,655,466

NMI Holdings, Inc., Class A(a)

306,968

13,614,031

Total

41,014,210

Insurance 3.3%

Hamilton Insurance Group Ltd., Class B

353,080

12,414,293

Horace Mann Educators Corp.

167,310

8,514,406

Neptune Insurance Holdings, Inc., Class A(a)

260,838

8,688,513

Total

29,617,212

Mortgage Real Estate Investment Trusts (REITs) 0.9%

Dynex Capital, Inc.

627,970

8,094,533

Total Financials

194,208,160

Health Care 10.4%

Biotechnology 0.9%

Kailera Therapeutics, Inc.(a)

152,740

2,352,196

Vaxcyte, Inc.(a)

93,920

5,704,701

Total

8,056,897

Health Care Equipment & Supplies 3.6%

Dentsply Sirona, Inc.

705,200

7,877,084

ICU Medical, Inc.(a)

81,750

14,138,662

Neogen Corp.(a)

452,182

5,227,224

Omnicell, Inc.(a)

152,460

5,360,494

Total

32,603,464

Health Care Providers & Services 4.1%

Acadia Healthcare Co., Inc.(a)

284,911

7,852,147

Ardent Health, Inc.(a)

449,780

4,866,620

Aveanna Healthcare Holdings, Inc.(a)

649,250

8,712,935

PACS Group, Inc.(a)

194,050

8,210,255

Pediatrix Medical Group, Inc.(a)

300,646

7,885,945

Total

37,527,902

Pharmaceuticals 1.8%

Amneal Pharmaceuticals, Inc.(a)

580,158

10,135,360

ANI Pharmaceuticals, Inc.(a)

79,160

5,798,470

Total

15,933,830

Total Health Care

94,122,093

Common Stocks (continued)

Issuer

Shares

Value ($)

Industrials 15.8%

Commercial Services & Supplies 2.1%

Healthcare Services Group, Inc.(a)

240,566

5,290,046

OPENLANE, Inc.(a)

376,790

13,413,724

Total

18,703,770

Electrical Equipment 0.5%

Sunrun, Inc.(a)

550,970

4,721,813

Ground Transportation 2.4%

ArcBest Corp.

77,413

10,680,672

Lyft, Inc., Class A(a)

637,350

10,771,215

Total

21,451,887

Machinery 4.1%

Astec Industries, Inc.

71,468

3,040,963

JBT Marel Corp.

108,690

12,702,600

Terex Corp.

187,531

11,910,094

Worthington Enterprises, Inc.

169,827

9,754,863

Total

37,408,520

Professional Services 3.5%

First Advantage Corp.(a)

436,750

9,180,485

Huron Consulting Group, Inc.(a)

47,950

7,666,726

Korn/Ferry International

177,440

15,179,992

Total

32,027,203

Trading Companies & Distributors 3.2%

Herc Holdings, Inc.

82,200

12,522,348

McGrath Rentcorp

66,657

7,494,913

Rush Enterprises, Inc., Class A

115,948

8,908,285

Total

28,925,546

Total Industrials

143,238,739

Information Technology 8.3%

Communications Equipment 1.2%

Netscout Systems, Inc.(a)

281,703

10,938,527

Electronic Equipment, Instruments & Components 2.8%

Crane NXT Co.

204,220

9,986,358

Insight Enterprises, Inc.(a)

96,136

15,095,275

Total

25,081,633

The accompanying Notes to Financial Statements are an integral part of this statement.

4

Columbia Small Cap Value and Inflection Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Software 4.3%

Alarm.com Holdings, Inc.(a)

182,420

10,500,095

Box, Inc., Class A(a)

288,770

10,332,191

SPS Commerce, Inc.(a)

118,110

10,086,594

Teradata Corp.(a)

284,365

8,246,585

Total

39,165,465

Total Information Technology

75,185,625

Materials 7.8%

Chemicals 3.8%

Avient Corp.

320,480

14,120,349

Chemours Co. (The)

271,870

4,230,297

Ecovyst, Inc.(a)

396,250

4,029,862

Minerals Technologies, Inc.

107,340

7,612,553

Stepan Co.

71,310

4,464,719

Total

34,457,780

Construction Materials 0.6%

Titan America SA(a)

389,732

5,814,802

Metals & Mining 3.4%

Commercial Metals Co.

181,590

12,251,877

Ryerson Holding Corp.

191,691

4,803,776

Sunshine Silver Mining & Refining Co.(a)

374,133

6,558,552

Torex Gold Resources, Inc.

140,560

6,871,056

Total

30,485,261

Total Materials

70,757,843

Real Estate 11.6%

Diversified REITs 2.2%

Broadstone Net Lease, Inc.

611,497

12,755,828

Global Net Lease, Inc.

806,240

7,401,283

Total

20,157,111

Hotel & Resort REITs 1.6%

DiamondRock Hospitality Co.

673,900

8,295,709

Xenia Hotels & Resorts, Inc.

335,154

6,284,138

Total

14,579,847

Industrial REITs 0.8%

Lineage, Inc.

197,120

7,736,960

Common Stocks (continued)

Issuer

Shares

Value ($)

Office REITs 1.3%

Cousins Properties, Inc.

404,164

11,716,714

Real Estate Management & Development 2.5%

Cushman & Wakefield Ltd.(a)

886,624

11,960,558

Newmark Group, Inc., Class A

706,122

10,754,238

Total

22,714,796

Retail REITs 1.9%

Phillips Edison & Co., Inc.

438,640

16,953,436

Specialized REITs 1.3%

Rayonier, Inc.

561,017

11,500,848

Total Real Estate

105,359,712

Utilities 2.0%

Gas Utilities 2.0%

National Fuel Gas Co.

105,810

8,788,579

UGI Corp.

233,720

8,986,534

Total

17,775,113

Total Utilities

17,775,113

Total Common Stocks

(Cost $769,413,990)

898,086,400

Exchange-Traded Equity Funds 0.5%

Shares

Value ($)

U.S. Small Cap 0.5%

iShares Russell 2000 Value ETF

20,790

4,611,222

Total Exchange-Traded Equity Funds

(Cost $4,547,046)

4,611,222

Money Market Funds 0.5%

Columbia Short-Term Cash Fund, 3.871%(b),(c)

4,571,612

4,569,327

Total Money Market Funds

(Cost $4,569,261)

4,569,327

Total Investments in Securities

(Cost: $778,530,297)

907,266,949

Other Assets & Liabilities, Net

(2,013,038

)

Net Assets

905,253,911

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Value and Inflection Fund  | 2026

5


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Notes to Portfolio of Investments 

(a)

Non-income producing investment.

(b)

The rate shown is the seven-day current annualized yield at August 31, 2026.

(c)

Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The values of the holdings and transactions in these affiliated companies during the period ended August 31, 2026 are as follows:

Affiliated issuers

Beginning

of period($)

Purchases($)

Sales($)

Net change in

unrealized

appreciation

(depreciation)($)

End of

period($)

Realized gain

(loss)($)

Dividends($)

End of

period shares

Columbia Short-Term Cash Fund, 3.871%

333,970

166,346,822

(162,111,494

)

29

4,569,327

(1,211

)

117,607

4,571,612

Fair value measurements  

The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.

Fair value inputs are summarized in the three broad levels listed below:

■

 Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date.  Valuation adjustments are not applied to Level 1 investments.

■

 Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).

■

 Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).

Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by Columbia Management Investment Advisers, LLC (the Investment Manager), along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.

Investments falling into the Level 3 category, if any, are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.

The Fund’s Board of Trustees (the Board) has designated the Investment Manager, through its Valuation Committee (the Committee), as valuation designee, responsible for determining the fair value of the assets of the Fund for which market quotations are not readily available using valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.

The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third-party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third-party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. Representatives of the Investment Manager report to the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.

The following table is a summary of the inputs used to value the Fund’s investments at August 31, 2026: 

Level 1 ($)

Level 2 ($)

Level 3 ($)

Total ($)

Investments in Securities

Common Stocks

Communication Services

22,656,081

—

—

22,656,081

Consumer Discretionary

63,113,988

—

—

63,113,988

Consumer Staples

37,170,140

—

—

37,170,140

Energy

74,498,906

—

—

74,498,906

The accompanying Notes to Financial Statements are an integral part of this statement.

6

Columbia Small Cap Value and Inflection Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Fair value measurements   (continued)

Level 1 ($)

Level 2 ($)

Level 3 ($)

Total ($)

Financials

194,208,160

—

—

194,208,160

Health Care

94,122,093

—

—

94,122,093

Industrials

143,238,739

—

—

143,238,739

Information Technology

75,185,625

—

—

75,185,625

Materials

70,757,843

—

—

70,757,843

Real Estate

105,359,712

—

—

105,359,712

Utilities

17,775,113

—

—

17,775,113

Total Common Stocks

898,086,400

—

—

898,086,400

Exchange-Traded Equity Funds

4,611,222

—

—

4,611,222

Money Market Funds

4,569,327

—

—

4,569,327

Total Investments in Securities

907,266,949

—

—

907,266,949

See the Portfolio of Investments for all investment classifications not indicated in the table.

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Value and Inflection Fund  | 2026

7


Statement of Assets and Liabilities

August 31, 2026 (Unaudited)

Assets

Investments in securities, at value

Unaffiliated issuers (cost $773,961,036)

$902,697,622

Affiliated issuers (cost $4,569,261)

4,569,327

Receivable for:

Investments sold

18,801,684

Capital shares sold

607,394

Dividends

551,988

Foreign tax reclaims

5,734

Expense reimbursement due from Investment Manager

10,291

Prepaid expenses

5,525

Total assets

927,249,565

Liabilities

Payable for:

Investments purchased

20,179,701

Capital shares redeemed

1,351,796

Management services fees

63,424

Distribution and/or service fees

1,631

Transfer agent fees

96,619

Compensation of chief compliance officer

66

Compensation of board members

2,016

Other expenses

60,638

Deferred compensation of board members

239,763

Total liabilities

21,995,654

Net assets applicable to outstanding capital stock

$905,253,911

Represented by

Paid in capital

636,920,292

Total distributable earnings (loss)

268,333,619

Total - representing net assets applicable to outstanding capital stock

$905,253,911

Class A

Net assets

$72,994,807

Shares outstanding

4,830,779

Net asset value per share

$15.11

Maximum sales charge

5.75%

Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares)

$16.03

Institutional Class

Net assets

$217,313,006

Shares outstanding

13,778,853

Net asset value per share

$15.77

Institutional 2 Class

Net assets

$70,157,982

Shares outstanding

4,184,630

Net asset value per share

$16.77

Institutional 3 Class

Net assets

$481,872,755

Shares outstanding

28,514,219

Net asset value per share

$16.90

Class R

Net assets

$2,970,377

Shares outstanding

206,946

Net asset value per share

$14.35

Class S

Net assets

$59,944,984

Shares outstanding

3,801,206

Net asset value per share

$15.77

The accompanying Notes to Financial Statements are an integral part of this statement.

8

Columbia Small Cap Value and Inflection Fund  | 2026


Statement of Operations

Six Months Ended August 31, 2026 (Unaudited)

Net investment income

Income:

Dividends — unaffiliated issuers

$8,164,083

Dividends — affiliated issuers

117,607

Foreign taxes withheld

(7,212

)

Total income

8,274,478

Expenses:

Management services fees

3,737,963

Distribution and/or service fees

Class A

90,003

Class R

6,912

Transfer agent fees

Class A

77,441

Institutional Class

228,079

Institutional 2 Class

20,014

Institutional 3 Class

11,716

Class R

2,979

Class S

62,968

Custodian fees

5,921

Printing and postage fees

34,917

Registration fees

41,409

Accounting services fees

16,880

Legal fees

12,821

Interest on interfund lending

1,007

Compensation of chief compliance officer

67

Compensation of board members

9,116

Deferred compensation of board members

25,474

Other

11,019

Total expenses

4,396,706

Fees waived or expenses reimbursed by Investment Manager and its affiliates

(624,561

)

Total net expenses

3,772,145

Net investment income

4,502,333

Realized and unrealized gain (loss) — net

Net realized gain (loss) on:

Investments — unaffiliated issuers

135,980,419

Investments — affiliated issuers

(1,211

)

Foreign currency translations

(198

)

Net realized gain

135,979,010

Net change in unrealized appreciation (depreciation) on:

Investments — unaffiliated issuers

(24,247,128

)

Investments — affiliated issuers

29

Foreign currency translations

(145

)

Net change in unrealized appreciation (depreciation)

(24,247,244

)

Net realized and unrealized gain

111,731,766

Net increase in net assets resulting from operations

$116,234,099

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Value and Inflection Fund  | 2026

9


Statement of Changes in Net Assets

Six Months Ended

August 31, 2026

(Unaudited)

Year Ended

February 28, 2026

Operations

Net investment income

$4,502,333

$6,473,151

Net realized gain

135,979,010

133,934,284

Net change in unrealized appreciation (depreciation)

(24,247,244

)

17,119,843

Net increase in net assets resulting from operations

116,234,099

157,527,278

Distributions to shareholders

Net investment income and net realized gains

Class A

(3,910,498

)

(9,725,416

)

Institutional Class

(11,125,184

)

(28,699,897

)

Institutional 2 Class

(3,647,050

)

(9,597,074

)

Institutional 3 Class

(22,829,151

)

(57,814,756

)

Class R

(155,514

)

(332,833

)

Class S

(3,040,711

)

(11,414,476

)

Total distributions to shareholders

(44,708,108

)

(117,584,452

)

Increase (decrease) in net assets from capital stock activity

7,384,183

(82,771,718

)

Total increase (decrease) in net assets

78,910,174

(42,828,892

)

Net assets at beginning of period

826,343,737

869,172,629

Net assets at end of period

$905,253,911

$826,343,737

The accompanying Notes to Financial Statements are an integral part of this statement.

10

Columbia Small Cap Value and Inflection Fund  | 2026


Statement of Changes in Net Assets  (continued)

Six Months Ended

Year Ended

August 31, 2026 (Unaudited)

February 28, 2026

Shares

Dollars ($)

Shares

Dollars ($)

Capital stock activity

Class A

Shares sold

425,182

6,250,854

828,360

10,746,189

Distributions reinvested

227,435

3,350,118

650,012

8,260,947

Shares redeemed

(734,633

)

(10,789,410

)

(1,690,455

)

(22,270,964

)

Net decrease

(82,016

)

(1,188,438

)

(212,083

)

(3,263,828

)

Institutional Class

Shares sold

1,818,403

28,245,715

3,706,359

50,335,668

Distributions reinvested

636,961

9,790,091

1,806,697

23,833,338

Shares redeemed

(2,402,830

)

(37,065,850

)

(6,171,028

)

(85,968,419

)

Net increase (decrease)

52,534

969,956

(657,972

)

(11,799,413

)

Institutional 2 Class

Shares sold

543,167

8,761,220

823,084

11,779,783

Distributions reinvested

220,500

3,600,761

687,842

9,595,673

Shares redeemed

(1,195,405

)

(19,711,180

)

(1,570,234

)

(22,934,633

)

Net decrease

(431,738

)

(7,349,199

)

(59,308

)

(1,559,177

)

Institutional 3 Class

Shares sold

3,613,660

59,507,750

4,730,999

69,063,800

Distributions reinvested

1,288,211

21,203,964

3,813,821

53,578,396

Shares redeemed

(4,007,906

)

(65,788,645

)

(9,851,955

)

(144,119,072

)

Net increase (decrease)

893,965

14,923,069

(1,307,135

)

(21,476,876

)

Class R

Shares sold

68,006

990,024

36,295

457,113

Distributions reinvested

11,108

155,514

27,388

332,833

Shares redeemed

(59,165

)

(856,352

)

(18,116

)

(231,716

)

Net increase

19,949

289,186

45,567

558,230

Class S

Shares sold

189,437

2,877,207

520,880

7,011,925

Distributions reinvested

197,834

3,040,710

867,615

11,414,476

Shares redeemed

(405,163

)

(6,178,308

)

(4,538,496

)

(63,657,055

)

Net decrease

(17,892

)

(260,391

)

(3,150,001

)

(45,230,654

)

Total net increase (decrease)

434,802

7,384,183

(5,340,932

)

(82,771,718

)

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Value and Inflection Fund  | 2026

11


Financial Highlights

The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The ratios of expenses and net investment income are annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher. A zero balance may reflect an amount rounding to less than $0.01 or 0.01%. 

Net asset value,

beginning of

period

Net

investment

income

(loss)

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class A

Six Months Ended 8/31/2026 (Unaudited)

$13.99

0.05

1.90

1.95

—

(0.83

)

(0.83

)

Year Ended 2/28/2026

$13.58

0.06

2.44

2.50

(0.08

)

(2.01

)

(2.09

)

Year Ended 2/28/2025

$16.35

0.07

1.34

1.41

(0.28

)

(3.90

)

(4.18

)

Year Ended 2/29/2024

$16.49

0.12

0.86

0.98

(0.23

)

(0.89

)

(1.12

)

Year Ended 2/28/2023

$18.48

0.09

(1.09

)

(1.00

)

(0.06

)

(0.93

)

(0.99

)

Year Ended 2/28/2022

$18.85

(0.02

)

2.33

2.31

(0.03

)

(2.65

)

(2.68

)

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$14.55

0.07

1.98

2.05

—

(0.83

)

(0.83

)

Year Ended 2/28/2026

$14.04

0.09

2.54

2.63

(0.11

)

(2.01

)

(2.12

)

Year Ended 2/28/2025

$16.77

0.12

1.38

1.50

(0.33

)

(3.90

)

(4.23

)

Year Ended 2/29/2024

$16.88

0.16

0.89

1.05

(0.27

)

(0.89

)

(1.16

)

Year Ended 2/28/2023

$18.90

0.13

(1.13

)

(1.00

)

(0.09

)

(0.93

)

(1.02

)

Year Ended 2/28/2022

$19.21

0.04

2.38

2.42

(0.08

)

(2.65

)

(2.73

)

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$15.41

0.09

2.10

2.19

—

(0.83

)

(0.83

)

Year Ended 2/28/2026

$14.74

0.12

2.69

2.81

(0.13

)

(2.01

)

(2.14

)

Year Ended 2/28/2025

$17.42

0.15

1.42

1.57

(0.35

)

(3.90

)

(4.25

)

Year Ended 2/29/2024

$17.49

0.19

0.93

1.12

(0.30

)

(0.89

)

(1.19

)

Year Ended 2/28/2023

$19.53

0.16

(1.16

)

(1.00

)

(0.11

)

(0.93

)

(1.04

)

Year Ended 2/28/2022

$19.77

0.06

2.45

2.51

(0.10

)

(2.65

)

(2.75

)

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$15.52

0.09

2.12

2.21

—

(0.83

)

(0.83

)

Year Ended 2/28/2026

$14.83

0.13

2.70

2.83

(0.13

)

(2.01

)

(2.14

)

Year Ended 2/28/2025

$17.50

0.15

1.44

1.59

(0.36

)

(3.90

)

(4.26

)

Year Ended 2/29/2024

$17.57

0.20

0.93

1.13

(0.31

)

(0.89

)

(1.20

)

Year Ended 2/28/2023

$19.61

0.17

(1.16

)

(0.99

)

(0.12

)

(0.93

)

(1.05

)

Year Ended 2/28/2022

$19.84

0.08

2.45

2.53

(0.11

)

(2.65

)

(2.76

)

The accompanying Notes to Financial Statements are an integral part of this statement.

12

Columbia Small Cap Value and Inflection Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income (loss)

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class A

Six Months Ended 8/31/2026 (Unaudited)

$15.11

14.10%

1.35%

(c)

1.20%

(c)

0.68%

58%

$72,995

Year Ended 2/28/2026

$13.99

20.54%

1.37%

(c)

1.20%

(c),(d)

0.44%

115%

$68,723

Year Ended 2/28/2025

$13.58

8.67%

1.36%

(c),(e)

1.22%

(c),(d),(e)

0.45%

70%

$69,580

Year Ended 2/29/2024

$16.35

6.58%

1.35%

(c)

1.25%

(c),(d)

0.77%

88%

$75,925

Year Ended 2/28/2023

$16.49

(4.97%

)

1.33%

1.27%

(d)

0.53%

67%

$84,580

Year Ended 2/28/2022

$18.48

11.94%

1.34%

1.28%

(d)

(0.08%

)

50%

$91,223

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$15.77

14.24%

1.10%

(c)

0.95%

(c)

0.93%

58%

$217,313

Year Ended 2/28/2026

$14.55

20.82%

1.12%

(c)

0.95%

(c),(d)

0.69%

115%

$199,716

Year Ended 2/28/2025

$14.04

8.95%

1.11%

(c),(e)

0.97%

(c),(d),(e)

0.73%

70%

$201,901

Year Ended 2/29/2024

$16.77

6.87%

1.10%

(c)

1.00%

(c),(d)

1.01%

88%

$300,567

Year Ended 2/28/2023

$16.88

(4.81%

)

1.08%

1.02%

(d)

0.76%

67%

$376,007

Year Ended 2/28/2022

$18.90

12.27%

1.09%

1.03%

(d)

0.18%

50%

$425,250

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$16.77

14.36%

0.94%

(c)

0.80%

(c)

1.09%

58%

$70,158

Year Ended 2/28/2026

$15.41

21.07%

0.95%

(c)

0.80%

(c)

0.84%

115%

$71,132

Year Ended 2/28/2025

$14.74

9.05%

0.94%

(c),(e)

0.83%

(c),(e)

0.91%

70%

$68,929

Year Ended 2/29/2024

$17.42

7.02%

0.93%

(c)

0.86%

(c)

1.16%

88%

$206,873

Year Ended 2/28/2023

$17.49

(4.64%

)

0.92%

0.88%

0.92%

67%

$201,436

Year Ended 2/28/2022

$19.53

12.41%

0.91%

0.88%

0.30%

50%

$223,545

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$16.90

14.39%

0.89%

(c)

0.75%

(c)

1.12%

58%

$481,873

Year Ended 2/28/2026

$15.52

21.11%

0.90%

(c)

0.76%

(c)

0.89%

115%

$428,716

Year Ended 2/28/2025

$14.83

9.11%

0.89%

(c),(e)

0.78%

(c),(e)

0.90%

70%

$429,100

Year Ended 2/29/2024

$17.50

7.04%

0.88%

(c)

0.81%

(c)

1.21%

88%

$555,015

Year Ended 2/28/2023

$17.57

(4.58%

)

0.87%

0.83%

0.99%

67%

$562,816

Year Ended 2/28/2022

$19.61

12.46%

0.86%

0.83%

0.37%

50%

$679,291

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Value and Inflection Fund  | 2026

13


Financial Highlights (continued)

Net asset value,

beginning of

period

Net

investment

income

(loss)

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class R

Six Months Ended 8/31/2026 (Unaudited)

$13.34

0.03

1.81

1.84

—

(0.83

)

(0.83

)

Year Ended 2/28/2026

$13.04

0.02

2.34

2.36

(0.05

)

(2.01

)

(2.06

)

Year Ended 2/28/2025

$15.86

0.03

1.29

1.32

(0.24

)

(3.90

)

(4.14

)

Year Ended 2/29/2024

$16.02

0.08

0.84

0.92

(0.19

)

(0.89

)

(1.08

)

Year Ended 2/28/2023

$18.01

0.05

(1.09

)

(1.04

)

(0.02

)

(0.93

)

(0.95

)

Year Ended 2/28/2022

$18.44

(0.07

)

2.29

2.22

—

(2.65

)

(2.65

)

Class S

Six Months Ended 8/31/2026 (Unaudited)

$14.55

0.07

1.98

2.05

—

(0.83

)

(0.83

)

Year Ended 2/28/2026

$14.04

0.10

2.53

2.63

(0.11

)

(2.01

)

(2.12

)

Year Ended 2/28/2025(f)

$16.02

0.03

0.11

0.14

(0.22

)

(1.90

)

(2.12

)

Notes to Financial Highlights

(a)

In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.

(b)

Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.

(c)

Ratios include interfund lending expense which is less than 0.01%.

(d)

The benefits derived from expense reductions had an impact of less than 0.01%.

(e)

Ratios include line of credit interest expense which is less than 0.01%.

(f)

Class S shares commenced operations on October 2, 2024. Per share data and total return reflect activity from that date.

The accompanying Notes to Financial Statements are an integral part of this statement.

14

Columbia Small Cap Value and Inflection Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income (loss)

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class R

Six Months Ended 8/31/2026 (Unaudited)

$14.35

13.95%

1.60%

(c)

1.45%

(c)

0.43%

58%

$2,970

Year Ended 2/28/2026

$13.34

20.28%

1.62%

(c)

1.45%

(c),(d)

0.16%

115%

$2,495

Year Ended 2/28/2025

$13.04

8.32%

1.61%

(c),(e)

1.47%

(c),(d),(e)

0.22%

70%

$1,845

Year Ended 2/29/2024

$15.86

6.36%

1.60%

(c)

1.50%

(c),(d)

0.50%

88%

$2,275

Year Ended 2/28/2023

$16.02

(5.32%

)

1.57%

1.52%

(d)

0.31%

67%

$2,661

Year Ended 2/28/2022

$18.01

11.73%

1.59%

1.53%

(d)

(0.34%

)

50%

$3,633

Class S

Six Months Ended 8/31/2026 (Unaudited)

$15.77

14.24%

1.10%

(c)

0.95%

(c)

0.93%

58%

$59,945

Year Ended 2/28/2026

$14.55

20.83%

1.12%

(c)

0.95%

(c),(d)

0.76%

115%

$55,562

Year Ended 2/28/2025

(f)

$14.04

(0.29%

)

1.12%

(c)

0.95%

(c)

0.46%

70%

$97,817

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Small Cap Value and Inflection Fund  | 2026

15


Notes to Financial Statements

August 31, 2026 (Unaudited)

Note 1. Organization

Columbia Small Cap Value and Inflection Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

Fund shares

The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different net investment income distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.

As described in the Fund’s prospectus, Class A shares are offered to the general public for investment. Institutional Class, Institutional 2 Class, Institutional 3 Class, Class R and Class S shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus. 

Note 2. Summary of significant accounting policies

Basis of preparation

The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification (Topic 946), Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which require management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

Segment reporting

The intent of FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures is to enable investors to better understand an entity’s overall performance and to assess its potential future cash flows through improved segment disclosures. The chief operating decision maker (CODM) for the Fund is Columbia Management Investment Advisers, LLC through its Investment Oversight Committee and Global Executive Group, which are responsible for assessing performance and making decisions about resource allocation. The CODM has determined that the Fund has a single operating segment because the CODM monitors the operating results of the Fund as a whole and the Fund’s long-term strategic asset allocation is pre-determined in accordance with the terms of its prospectus, based on a defined investment strategy which is executed by the Fund’s portfolio managers as a team. The financial information provided to and reviewed by the CODM is consistent with that presented within the Fund’s financial statements.

Security valuation

Equity securities listed on an exchange are valued at the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. Securities with a closing price not readily available or not listed on any exchange are valued at the mean between the closing bid and ask prices. Listed preferred stocks convertible into common stocks are valued using an evaluated price from a pricing service.

16

Columbia Small Cap Value and Inflection Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Foreign equity securities are valued based on the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy approved by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including relevant general and sector indices, currency fluctuations, depositary receipts, and futures, as applicable, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.

Investments in open-end investment companies (other than exchange-traded funds (ETFs)) are valued at the latest net asset value reported by those companies as of the valuation time. 

Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.

The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.

GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.

Foreign currency transactions and translations

The values of all assets and liabilities denominated in foreign currencies are generally translated into U.S. dollars at exchange rates determined at the close of regular trading on the New York Stock Exchange. Net realized and unrealized gains (losses) on foreign currency transactions and translations include gains (losses) arising from the fluctuation in exchange rates between trade and settlement dates on securities transactions, gains (losses) arising from the disposition of foreign currency and currency gains (losses) between the accrual and payment dates on dividends, interest income and foreign withholding taxes.

For financial statement purposes, the Fund does not distinguish that portion of gains (losses) on investments which is due to changes in foreign exchange rates from that which is due to changes in market prices of the investments. Such fluctuations are included with the net realized and unrealized gains (losses) on investments in the Statement of Operations.

Security transactions

Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.

Income recognition

Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of an ex-dividend notification in the case of certain foreign securities.

The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of

Columbia Small Cap Value and Inflection Fund  | 2026

17


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.

Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.

Expenses

General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.

Determination of class net asset value

All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.

Federal income tax status

The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.

Foreign taxes

The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability in the Statement of Assets and Liabilities.

Distributions to shareholders

Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.

Guarantees and indemnifications

Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.

18

Columbia Small Cap Value and Inflection Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Note 3. Fees and other transactions with affiliates

Management services fees

The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice and is responsible for administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.87% to 0.75% as the Fund’s net assets increase. The annualized effective management services fee rate for the six months ended August 31, 2026 was 0.85% of the Fund’s average daily net assets.

Compensation of Board members

Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund. The expense for the Deferred Plan, which includes Trustees’ fees deferred during the current period as well as any gains or losses on the Trustees’ deferred compensation balances as a result of market fluctuations, is included in "Deferred compensation of board members" in the Statement of Operations.

Compensation of Chief Compliance Officer

The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.

Transfer agency fees

Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with SS&C GIDS, Inc. (SS&C GIDS) to serve as sub-transfer agent. The Transfer Agent pays the fees of SS&C GIDS for services as sub-transfer agent and SS&C GIDS is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).

The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.

The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.

Columbia Small Cap Value and Inflection Fund  | 2026

19


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

For the six months ended August 31, 2026, the Fund’s annualized effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows: 

Effective rate (%)

Class A

0.22

Institutional Class

0.22

Institutional 2 Class

0.05

Institutional 3 Class

0.01

Class R

0.22

Class S

0.22

An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the six months ended August 31, 2026, no minimum account balance fees were charged by the Fund.

Distribution and service fees

The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.

Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly distribution fee to the Distributor at the maximum annual rate of 0.50% of the average daily net assets attributable to Class R shares of the Fund.

Sales charges

Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the six months ended August 31, 2026, if any, are listed below: 

Front End (%)

CDSC (%)

Amount ($)

Class A

5.75

0.50 - 1.00

(a)

11,164

(a)

This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.

The Fund’s other share classes are not subject to sales charges.

20

Columbia Small Cap Value and Inflection Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Expenses waived/reimbursed by the Investment Manager and its affiliates

The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the classes’ average daily net assets: 

July 1, 2026

through

June 30, 2027 (%)

Prior to

July 1, 2026 (%)

Class A

1.20

1.20

Institutional Class

0.95

0.95

Institutional 2 Class

0.80

0.80

Institutional 3 Class

0.75

0.76

Class R

1.45

1.45

Class S

0.95

0.95

Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, costs associated with shareholder meetings, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.

Note 4. Federal tax information

The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.

At August 31, 2026, the approximate cost of all investments for federal income tax purposes and the aggregate gross approximate unrealized appreciation and depreciation based on that cost was: 

Federal

tax cost ($)

Gross unrealized

appreciation ($)

Gross unrealized

(depreciation) ($)

Net unrealized

appreciation ($)

778,530,000

144,300,000

(15,563,000

)

128,737,000

Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.

Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.

Note 5. Portfolio information

The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $503,583,301 and $536,423,144, respectively, for the six months ended August 31, 2026. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.

Columbia Small Cap Value and Inflection Fund  | 2026

21


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Note 6. Affiliated money market fund

The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. The Securities and Exchange Commission has adopted amendments to money market fund rules requiring institutional prime money market funds like the Affiliated MMF to be subject to a discretionary liquidity fee of up to 2% if the imposition of such a fee is determined to be in the best interest of the Affiliated MMF and to a mandatory liquidity fee if daily net redemptions exceed 5% of net assets.

Note 7. Interfund lending

Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.

Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.

The Fund’s activity in the Interfund Program during the six months ended August 31, 2026 was as follows: 

Borrower or lender

Average loan

balance ($)

Weighted average

interest rate (%)

Number of days

with outstanding loans

Borrower

2,900,000

4.18

3

Interest expense incurred by the Fund is recorded as Interest on interfund lending in the Statement of Operations. The Fund had no outstanding interfund loans at August 31, 2026.

Note 8. Line of credit

Effective October 22, 2026, the Fund has access to a revolving credit facility with a syndicate of banks led by State Street Bank and Trust Company, Citibank, N.A. and Wells Fargo Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is an agreement between the Fund and certain other funds managed by the Investment Manager, severally and not jointly, permits aggregate borrowings up to $750 million. Interest is currently charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate and (ii) the overnight bank funding rate, plus 1.00% in each case. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in October unless extended or renewed. Prior to October 22, 2026, the Fund had access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A., which permitted aggregate borrowings up to $750 million. Interest was charged to each participating fund based on its borrowings at a rate equal to the highest of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case.

The Fund had no borrowings during the six months ended August 31, 2026.

22

Columbia Small Cap Value and Inflection Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Note 9. Risks and uncertainties

An investment in the Fund involves risks, including market risk and concentration risk, among others. The value of the Fund’s holdings and the Fund’s net asset value may go down. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally.

Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, other conflicts, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.

To the extent that the Fund concentrates its investment in particular issuers, countries, geographic regions, industries or sectors, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of issuers, countries, geographic regions, industries, sectors or investments.

Additional risk factors of the Fund are described more fully in the Fund’s Prospectus and Statement of Additional Information.

Shareholder concentration risk

At August 31, 2026, one unaffiliated shareholder of record owned 29.2% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Fund shares sold to or redeemed by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.

Note 10. Subsequent events

Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.

Note 11. Information regarding pending and settled legal proceedings

Ameriprise Financial and certain of its affiliates are involved, in the normal course of business, in legal proceedings that include regulatory inquiries, arbitration and litigation (including class actions) concerning matters arising in connection with the conduct of their activities as part of a diversified financial services firm. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.

There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, it is inherently difficult to determine whether any loss is probable or even reasonably possible, or to reasonably estimate the amount of any loss that may result from such matters. An adverse outcome in one or more of these proceedings could result in adverse

Columbia Small Cap Value and Inflection Fund  | 2026

23


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

judgments, settlements, fines, penalties or other relief, and may lead to further claims, examinations, adverse publicity or reputational damage, each of which could have a material adverse effect on the consolidated financial condition or results of operations or financial condition of Ameriprise Financial or one or more of its affiliates that provide services to the Fund.

24

Columbia Small Cap Value and Inflection Fund  | 2026


 Approval of Management Agreement

(Unaudited)

Columbia Management Investment Advisers, LLC (the Investment Manager, and together with its domestic and global affiliates, Columbia Threadneedle Investments), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial), serves as the investment manager to Columbia Small Cap Value and Inflection Fund (the Fund). Under a management agreement (the Management Agreement), the Investment Manager provides investment advice and other services to the Fund. The Investment Manager also provides investment advice and other services to other funds in the Columbia Fund family (collectively, the Funds).

On an annual basis, the Fund’s Board of Trustees (the Board), including the independent Board members (the Independent Trustees), considers renewal of the Management Agreement. The Investment Manager prepared detailed reports for the Board and its Contracts Committee (including its Contracts Subcommittee) in March, April and June 2026, including reports providing the results of analyses performed by a third-party data provider, Broadridge Financial Solutions, Inc. (Broadridge), and comprehensive responses by the Investment Manager to written requests for information by independent legal counsel to the Independent Trustees (Independent Legal Counsel), to assist the Board in making this determination. In addition, throughout the year, the Board (or its committees or subcommittees) regularly meets with portfolio management teams and senior management personnel and reviews information prepared by the Investment Manager addressing the services the Investment Manager provides and Fund performance.  The Board also accords appropriate weight to the work, deliberations and conclusions of the various committees (including their subcommittees), such as the Contracts Committee, the Investment Review Committee, the Audit Committee and the Compliance Committee, in determining whether to continue the Management Agreement.

The Board, at its June 18, 2026 Board meeting (the June Meeting), considered the renewal of the Management Agreement for an additional one-year term. At the June Meeting, Independent Legal Counsel reviewed with the Independent Trustees various factors relevant to the Board’s consideration of advisory agreements and the Board’s legal responsibilities related to such consideration. The Independent Trustees considered such information as they, their legal counsel or the Investment Manager believed reasonably necessary to evaluate and to approve the continuation of the Management Agreement. Among other things, the information and factors considered included the following:

•

Information on the investment performance of the Fund relative to the performance of a group of mutual funds determined to be comparable to the Fund by Broadridge, as well as performance relative to one or more benchmarks; 

•

Information on the Fund’s management fees and total expenses, including information comparing the Fund’s expenses to those of a group of comparable mutual funds, as determined by Broadridge; 

•

The Investment Manager’s agreement to contractually limit or cap total operating expenses for the Fund so that total operating expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses and infrequent and/or unusual expenses) would not exceed a specified annual rate, as a percentage of the Fund’s net assets;

•

Terms of the Management Agreement;

•

Descriptions of other agreements and arrangements with affiliates of the Investment Manager relating to the operations of the Fund, including agreements with respect to the provision of transfer agency and shareholder services to the Fund;

•

Descriptions of various services performed by the Investment Manager under the Management Agreement, including portfolio management and portfolio trading practices;

•

Information regarding any recently negotiated management fees of similarly-managed portfolios of other institutional clients of the Investment Manager;

•

Information regarding the resources of the Investment Manager, including information regarding senior management, portfolio managers and other personnel;

•

Information regarding the capabilities of the Investment Manager with respect to compliance monitoring services; 

•

The profitability to the Investment Manager and its affiliates from their relationships with the Fund; and

Columbia Small Cap Value and Inflection Fund  | 2026

25


Approval of Management Agreement (continued)

(Unaudited)

•

Report provided by the Board’s independent fee consultant, JDL Consultants, LLC (JDL).

Following an analysis and discussion of the foregoing, and the factors identified below, the Board, including all of the Independent Trustees, approved the renewal of the Management Agreement.

Nature, extent and quality of services provided by the Investment Manager

The Board analyzed various reports and presentations it had received detailing the services performed by the Investment Manager, as well as its history, expertise, resources and relative capabilities, and the qualifications of its personnel.

The Board specifically considered the many developments during recent years concerning the services provided by the Investment Manager. Among other things, the Board noted the organization and depth of the equity and credit research departments. The Board further observed the enhancements to the investment risk management department’s processes, systems and oversight over the past several years. The Board also took into account the broad scope of services provided by the Investment Manager to the Fund, including, among other services, investment, risk and compliance oversight.  The Board also took into account the information it received concerning the Investment Manager’s ability to attract and retain key portfolio management personnel and that it has sufficient resources to provide competitive and adequate compensation to investment personnel.

In connection with the Board’s evaluation of the overall package of services provided by the Investment Manager, the Board also considered the nature, quality and range of administrative services provided to the Fund by the Investment Manager, as well as the achievements in 2025 in the performance of administrative services, and noted the various enhancements anticipated for 2026. In evaluating the quality of services provided under the Management Agreement, the Board also took into account the organization and strength of the Fund’s and its service providers’ compliance programs. The Board also reviewed the financial condition of the Investment Manager and its affiliates and each entity’s ability to carry out its responsibilities under the Management Agreement and the Fund’s other service agreements.

In addition, the Board discussed the acceptability of the terms of the Management Agreement, noting that no changes were proposed from the form of agreement previously approved. The Board also noted the wide array of legal and compliance services provided to the Fund under the Management Agreement.

After reviewing these and related factors (including investment performance as discussed below), the Board concluded, within the context of its overall conclusions, that the nature, extent and quality of the services provided to the Fund under the Management Agreement supported the continuation of the Management Agreement.

Investment performance

The Board carefully reviewed the investment performance of the Fund, including detailed reports providing the results of analyses performed by each of the Investment Manager, Broadridge and JDL collectively showing, for various periods (including since manager inception): (i) the performance of the Fund, (ii) the Fund’s performance relative to peers and benchmarks and (iii) the net assets of the Fund. The Board observed that the Fund’s performance for certain periods ranked above median relative to its peers based on information provided by Broadridge.

The Board also reviewed a description of the third-party data provider’s methodology for identifying the Fund’s peer groups for purposes of performance and expense comparisons. 

The Board also considered the Investment Manager’s performance and reputation generally.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the performance of the Fund and the Investment Manager, in light of other considerations, supported the continuation of the Management Agreement. 

Comparative fees, costs of services provided and the profits realized by the Investment Manager and its affiliates from their relationships with the Fund

The Board reviewed comparative fees and the costs of services provided under the Management Agreement. The Board members considered detailed comparative information set forth in an annual report on fees and expenses, including, among other things, data (based on analyses conducted by Broadridge and JDL) showing a comparison of the Fund’s expenses

26

Columbia Small Cap Value and Inflection Fund  | 2026


Approval of Management Agreement (continued)

(Unaudited)

with median expenses paid by funds in its comparative peer universe, as well as data showing the Fund’s contribution to the Investment Manager’s profitability. The Board reviewed the fees charged to comparable institutional or other accounts/vehicles managed by the Investment Manager, including vehicles subadvised by the Investment Manager, and discussed differences in how the products are managed and operated, thus explaining many of the differences in fees.

The Board considered the reports of JDL, which assisted in the Board’s analysis of the Funds’ performance and expenses and the reasonableness of the Funds’ fee rates.  The Board accorded particular weight to the notion that a primary objective of the level of fees is to achieve a rational pricing model applied consistently across the various product lines in the Fund family, while assuring that the overall fees for each Fund (with certain exceptions) are generally in line with the current “pricing philosophy” such that Fund total expense ratios, in general, approximate or are lower than the median expense ratios of funds in the same Lipper comparison universe. The Board took into account that the Fund’s total expense ratio (after considering proposed expense caps/waivers) approximated the peer universe’s median expense ratio. 

After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the levels of management fees and expenses of the Fund, in light of other considerations, supported the continuation of the Management Agreement.

The Board also considered the profitability of the Investment Manager and its affiliates in connection with the Investment Manager providing management services to the Fund. With respect to the profitability of the Investment Manager and its affiliates, the Independent Trustees referred to information discussing the profitability to the Investment Manager and Ameriprise Financial from managing, operating and distributing the Funds. The Board considered that the profitability generated by the Investment Manager in 2025 had increased slightly from 2024 levels due to a variety of factors, including the increased assets under management of the Funds. It also took into account the indirect economic benefits flowing to the Investment Manager or its affiliates in connection with managing or distributing the Funds, such as the enhanced ability to offer various other financial products to Ameriprise Financial customers, soft dollar benefits and overall reputational advantages. The Board noted that the fees paid by the Fund should permit the Investment Manager to offer competitive compensation to its personnel, make necessary investments in its business and earn an appropriate profit. After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the costs of services provided and the profitability to the Investment Manager and its affiliates from their relationships with the Fund supported the continuation of the Management Agreement.

Economies of scale

The Board considered the potential existence of economies of scale in the provision by the Investment Manager of services to the Fund, and whether those economies of scale were shared with the Fund through breakpoints in investment management fees or other means, such as expense limitation arrangements and additional investments by the Investment Manager in investment, trading, compliance and other resources. The Board considered the economies of scale that might be realized as the Fund’s net asset level grows and took note of the extent to which Fund shareholders might also benefit from such growth. In this regard, the Board took into account that management fees decline as Fund assets exceed various breakpoints, all of which have not been surpassed. The Board observed that the Management Agreement thus provides for breakpoints in the management fee rate schedule that allow opportunities for shareholders to realize lower fees as Fund assets grow and that there are additional opportunities through other means for sharing economies of scale with shareholders. 

Conclusion

The Board reviewed all of the above considerations in reaching its decision to approve the continuation of the Management Agreement. In reaching its conclusions, no single factor was determinative. 

On June 18, 2026, the Board, including all of the Independent Trustees, determined that fees payable under the Management Agreement were fair and reasonable in light of the extent and quality of services provided and approved the renewal of the Management Agreement.

Columbia Small Cap Value and Inflection Fund  | 2026

27


Columbia Small Cap Value and Inflection Fund

P.O. Box 219104

Kansas City, MO 64121-9104

  

Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.

Columbia Threadneedle Investments® (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.

© 2026 Columbia Management Investment Advisers, LLC.

columbiathreadneedleus.com/investor/

SAR230_(10/26)



  

Columbia Overseas Value Fund

Semi-Annual Financial Statements and Additional Information

August 31, 2026 (Unaudited)

Not FDIC or NCUA Insured

No Financial Institution Guarantee

May Lose Value


Table of Contents

Portfolio of Investments

3

Statement of Assets and Liabilities

9

Statement of Operations

11

Statement of Changes in Net Assets

12

Financial Highlights

14

Notes to Financial Statements

20

Approval of Management Agreement

33

Columbia Overseas Value Fund | 2026


Portfolio of Investments

August 31, 2026 (Unaudited)

(Percentages represent value of investments compared to net assets)

Investments in securities

Common Stocks 98.0%

Issuer

Shares

Value ($)

Australia 3.6%

Northern Star Resources Ltd.

7,326,147

123,854,880

Paladin Energy Ltd.(a)

6,934,296

57,451,266

Santos Ltd.

11,501,098

67,073,542

Total

248,379,688

Belgium 0.2%

Lakefront Biotherapeutics NV, ADR(a)

595,589

16,974,287

Brazil 0.2%

Cosan SA(a)

19,935,469

14,966,366

Canada 5.4%

Celestica, Inc.(a)

109,696

32,842,982

Finning International, Inc.

938,153

61,550,743

NexGen Energy Ltd.(a)

3,889,486

40,722,918

Nutrien Ltd.

600,998

45,393,379

Pan American Silver Corp.

934,982

48,544,266

Teck Resources Ltd., Class B

1,005,642

68,504,333

Vermilion Energy, Inc.

3,454,520

44,321,492

West Fraser Timber Co., Ltd.

460,462

31,376,335

Total

373,256,448

China 2.4%

Kingboard Holdings Ltd.

5,446,000

37,531,089

Ping An Insurance Group Co. of China Ltd.,

Class H

18,275,500

131,082,060

Total

168,613,149

Denmark 0.6%

Bavarian Nordic A/S(a)

1,245,037

42,015,065

Finland 0.9%

UPM-Kymmene OYJ

2,136,895

59,659,415

France 7.2%

AXA SA

3,446,524

172,087,855

BNP Paribas SA

357,357

42,546,052

Eiffage SA

192,017

24,250,242

Sanofi SA

1,054,497

93,754,325

TotalEnergies SE

1,897,847

167,226,850

Total

499,865,324

Common Stocks (continued)

Issuer

Shares

Value ($)

Germany 4.7%

Deutsche Bank AG, Registered Shares

2,738,915

109,692,308

Duerr AG

952,007

20,367,232

E.ON SE

3,075,927

63,516,556

Fresenius Medical Care AG

1,353,436

61,930,947

KION Group AG

739,779

37,917,784

Siemens Energy AG

202,569

33,364,658

Total

326,789,485

Greece 2.2%

Piraeus Bank SA(a)

12,805,131

152,354,861

Hong Kong 4.0%

BOC Hong Kong Holdings Ltd.

16,333,000

109,552,805

Sun Hung Kai Properties Ltd.

6,304,000

93,110,958

WH Group Ltd.

82,513,830

77,889,742

Total

280,553,505

Ireland 2.1%

Bank of Ireland Group PLC

6,492,695

143,248,533

Israel 1.2%

Check Point Software Technologies Ltd.(a)

596,409

82,847,174

Italy 3.9%

Avio SpA

850,120

29,062,140

BPER Banca SPA

9,410,065

155,736,884

Buzzi SpA

852,450

40,605,532

PRADA SpA

8,239,000

42,902,991

Total

268,307,547

Ivory Coast 0.7%

Endeavour Mining PLC

830,803

51,843,082

Japan 21.5%

Daiichi Life Group, Inc.

7,717,800

88,271,006

Daiwabo Holdings Co., Ltd.

3,174,700

75,377,393

Iyogin Holdings, Inc.

3,262,600

81,600,217

Kinden Corp.

490,700

21,431,429

Macnica Holdings, Inc.

3,222,600

74,280,859

MatsukiyoCocokara & Co.

5,765,600

94,234,627

Mebuki Financial Group, Inc.

14,561,900

154,724,798

Medipal Holdings Corp.

2,670,300

48,266,581

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Overseas Value Fund  | 2026

3


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Common Stocks (continued)

Issuer

Shares

Value ($)

Nippon Television Holdings, Inc.

2,538,900

48,236,419

ORIX Corp.

2,356,900

91,697,154

Sankyo Co., Ltd.

5,162,400

64,785,784

Sanwa Holdings Corp.

812,900

18,456,241

SCREEN Holdings Co., Ltd.

270,700

22,778,824

Shimamura Co., Ltd.

3,152,900

64,617,181

Ship Healthcare Holdings, Inc.

1,253,500

18,719,350

SoftBank Group Corp.

522,800

16,841,820

Sumitomo Corp.

11,016,600

122,977,573

Sumitomo Mitsui Financial Group, Inc.

4,079,800

175,136,803

Sundrug Co., Ltd.

300,100

7,010,787

Tokyo Tatemono Co., Ltd.

3,573,700

76,853,294

Toyota Tsusho Corp.

2,356,800

109,389,511

TV Asahi Holdings Corp.

1,010,800

19,825,349

Total

1,495,513,000

Jersey 0.9%

Yellow Cake PLC(a)

8,329,590

65,290,850

Kazakhstan 0.6%

Kaspi.KZ JSC, ADR

432,423

45,464,954

Netherlands 5.8%

ASR Nederland NV

1,816,379

153,066,059

ING Groep NV

4,541,679

160,777,835

Koninklijke Ahold Delhaize NV

1,699,471

60,503,729

Prosus NV, Class N(a)

710,323

31,642,225

Total

405,989,848

Norway 2.9%

DNB Bank ASA

4,011,521

136,620,528

Leroy Seafood Group ASA

13,010,169

63,199,113

Total

199,819,641

Poland 1.5%

Powszechna Kasa Oszczednosci Bank Polski SA

3,387,650

103,585,775

Russian Federation —%

Lukoil PJSC(a),(b),(c),(d),(e)

106,132

—

Singapore 1.5%

BW LPG Ltd.

1,352,367

32,794,900

Venture Corp., Ltd.

5,500,400

73,101,116

Total

105,896,016

Common Stocks (continued)

Issuer

Shares

Value ($)

South Africa 1.4%

Impala Platinum Holdings Ltd.

3,528,047

49,359,753

Thungela Resources Ltd.

5,897,100

48,019,047

Total

97,378,800

South Korea 0.5%

Youngone Corp.

626,267

33,022,597

Spain 2.0%

Banco Santander SA

9,542,196

139,638,714

Sweden 0.6%

Securitas AB

2,459,319

38,958,722

Switzerland 1.0%

Nestlé SA, Registered Shares

722,534

70,284,097

Thailand 0.7%

Bangkok Bank PCL, Foreign Registered Shares

8,441,500

48,596,829

United Kingdom 7.3%

AstraZeneca PLC

295,011

47,830,133

British American Tobacco PLC

649,460

36,086,462

Centrica PLC

24,850,949

52,044,910

HSBC Holdings PLC

3,360,908

68,842,967

Imperial Brands PLC

3,919,365

133,913,118

Marks & Spencer Group PLC

15,572,489

82,555,100

TP Icap Group PLC

18,507,583

85,752,699

Total

507,025,389

United States 10.5%

Burford Capital Ltd.

8,975,161

37,246,918

Diversified Energy Co.

3,310,660

49,295,727

Energy Fuels, Inc.(a)

3,819,181

56,332,920

Flutter Entertainment PLC(a)

209,403

20,977,993

Insmed, Inc.(a)

319,122

38,875,442

Jazz Pharmaceuticals PLC(a)

226,444

56,764,982

JBS NV, Class A

3,291,530

44,238,163

Primo Brands Corp., Class A

5,297,721

120,893,993

Roche Holding Ag

130,182

56,749,057

Shell PLC

5,434,387

248,983,089

Total

730,358,284

Total Common Stocks

(Cost $5,125,089,962)

6,816,497,445

The accompanying Notes to Financial Statements are an integral part of this statement.

4

Columbia Overseas Value Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Exchange-Traded Equity Funds 1.3%

Shares

Value ($)

United States 1.3%

iShares MSCI EAFE Value ETF

1,095,079

89,588,413

Total Exchange-Traded Equity Funds

(Cost $89,878,577)

89,588,413

Money Market Funds 0.2%

Columbia Short-Term Cash Fund, 3.871%(f),(g)

15,424,444

15,416,732

Total Money Market Funds

(Cost $15,414,166)

15,416,732

Total Investments in Securities

(Cost $5,230,382,705)

6,921,502,590

Other Assets & Liabilities, Net

34,731,468

Net Assets

$6,956,234,058

At August 31, 2026, securities and/or cash totaling $1,080,000 were pledged as collateral.

Investments in derivatives 

Forward foreign currency exchange contracts

Currency to

be sold

Currency to

be purchased

Counterparty

Settlement

date

Unrealized

appreciation ($)

Unrealized

depreciation ($)

19,571,785,000 JPY

123,269,620 USD

Barclays

10/08/2026

402,651

—

265,739,000 SEK

27,926,081 USD

Barclays

10/08/2026

123,977

—

52,463,000 SGD

41,112,948 USD

Citi

10/08/2026

—

(261,817

)

356,201,358 USD

308,416,000 EUR

Citi

10/08/2026

2,544,432

—

58,270,222,000 KRW

41,067,180 USD

Goldman Sachs International

10/08/2026

—

(1,563,198

)

130,005,000 NOK

13,670,983 USD

HSBC

10/08/2026

—

(235,848

)

163,286,000 NZD

95,770,505 USD

HSBC

10/08/2026

—

(931,383

)

41,958,131 USD

35,954,000 EUR

HSBC

10/08/2026

—

(136,870

)

212,285,096 USD

157,377,000 GBP

HSBC

10/08/2026

971,756

—

10,284,000 GBP

13,977,918 USD

JPMorgan

10/08/2026

42,378

—

355,778,590 USD

504,457,000 AUD

JPMorgan

10/08/2026

5,518,558

—

29,271,000 AUD

20,977,852 USD

Morgan Stanley

10/08/2026

13,669

—

524,106,000 CAD

376,661,025 USD

Morgan Stanley

10/08/2026

—

(2,117,639

)

48,406,000 CAD

34,938,829 USD

UBS

10/08/2026

—

(44,858

)

273,603,292 USD

221,382,000 CHF

UBS

10/08/2026

1,371,778

—

20,613,133 USD

17,636,000 EUR

UBS

10/08/2026

—

(99,150

)

Total

10,989,199

(5,390,763

)

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Overseas Value Fund  | 2026

5


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Notes to Portfolio of Investments 

(a)

Non-income producing investment.

(b)

Represents fair value as determined in good faith under procedures approved by the Board of Trustees. At August 31, 2026, the total value of these securities amounted to $0, which represents less than 0.01% of total net assets.

(c)

Denotes a restricted security, which is subject to legal or contractual restrictions on resale under federal securities laws. Disposal of a restricted investment may involve time-consuming negotiations and expenses, and prompt sale at an acceptable price may be difficult to achieve. Private placement securities are generally considered to be restricted, although certain of those securities may be traded between qualified institutional investors under the provisions of Section 4(a)(2) and Rule 144A. The Fund will not incur any registration costs upon such a trade. At August 31, 2026, the total market value of these securities amounted to $0, which represents less than 0.01% of total net assets. Additional information on these securities is as follows:

Security

Acquisition

Dates

Shares

Cost ($)

Value ($)

Lukoil PJSC

01/25/2022-01/26/2022

106,132

8,693,218

—

(d)

As a result of sanctions and restricted cross-border payments, certain payments have not been recognized by the Fund. The Fund will continue to monitor the net realizable value and record payments when it is considered collectible.

(e)

Valuation based on significant unobservable inputs.

(f)

The rate shown is the seven-day current annualized yield at August 31, 2026.

(g)

Under the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The values of the holdings and transactions in these affiliated companies during the period ended August 31, 2026 are as follows:

Affiliated issuers

Beginning

of period($)

Purchases($)

Sales($)

Net change in

unrealized

appreciation

(depreciation)($)

End of

period($)

Realized gain

(loss)($)

Dividends($)

End of

period shares

Columbia Short-Term Cash Fund, 3.871%

54,520,340

925,858,122

(964,955,615

)

(6,115

)

15,416,732

(25,859

)

1,244,034

15,424,444

Abbreviation Legend 

ADR

American Depositary Receipt

Currency Legend 

AUD

Australian Dollar

CAD

Canadian Dollar

CHF

Swiss Franc

EUR

Euro

GBP

British Pound

JPY

Japanese Yen

KRW

South Korean Won

NOK

Norwegian Krone

NZD

New Zealand Dollar

SEK

Swedish Krona

SGD

Singapore Dollar

USD

US Dollar

Fair value measurements  

The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.

Fair value inputs are summarized in the three broad levels listed below:

The accompanying Notes to Financial Statements are an integral part of this statement.

6

Columbia Overseas Value Fund  | 2026


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Fair value measurements   (continued)

■

 Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date.  Valuation adjustments are not applied to Level 1 investments.

■

 Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).

■

 Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).

Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by Columbia Management Investment Advisers, LLC (the Investment Manager), along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.

Values of foreign equity securities actively traded in markets where there is a significant delay in the local close relative to the New York Stock Exchange may include an adjustment to reflect the impact of market movements following the close of local trading, as described in Note 2 to the financial statements – Security valuation. When such adjustments have been made, the foreign equity securities are classified as Level 2.

Investments falling into the Level 3 category, if any, are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.

The Fund’s Board of Trustees (the Board) has designated the Investment Manager, through its Valuation Committee (the Committee), as valuation designee, responsible for determining the fair value of the assets of the Fund for which market quotations are not readily available using valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.

The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third-party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third-party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. Representatives of the Investment Manager report to the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.

The following table is a summary of the inputs used to value the Fund’s investments at August 31, 2026: 

Level 1 ($)

Level 2 ($)

Level 3 ($)

Total ($)

Investments in Securities

Common Stocks

Australia

—

248,379,688

—

248,379,688

Belgium

16,974,287

—

—

16,974,287

Brazil

14,966,366

—

—

14,966,366

Canada

373,256,448

—

—

373,256,448

China

—

168,613,149

—

168,613,149

Denmark

—

42,015,065

—

42,015,065

Finland

—

59,659,415

—

59,659,415

France

—

499,865,324

—

499,865,324

Germany

—

326,789,485

—

326,789,485

Greece

—

152,354,861

—

152,354,861

Hong Kong

—

280,553,505

—

280,553,505

Ireland

—

143,248,533

—

143,248,533

Israel

82,847,174

—

—

82,847,174

Italy

—

268,307,547

—

268,307,547

Ivory Coast

—

51,843,082

—

51,843,082

Japan

165,862,595

1,329,650,405

—

1,495,513,000

Jersey

—

65,290,850

—

65,290,850

Kazakhstan

45,464,954

—

—

45,464,954

Netherlands

60,503,729

345,486,119

—

405,989,848

Norway

—

199,819,641

—

199,819,641

Poland

—

103,585,775

—

103,585,775

Russian Federation

—

—

0

*

0

*

Singapore

32,794,900

73,101,116

—

105,896,016

South Africa

48,019,047

49,359,753

—

97,378,800

South Korea

—

33,022,597

—

33,022,597

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Overseas Value Fund  | 2026

7


Portfolio of Investments (continued)

August 31, 2026 (Unaudited)

Fair value measurements   (continued)

Level 1 ($)

Level 2 ($)

Level 3 ($)

Total ($)

Spain

—

139,638,714

—

139,638,714

Sweden

—

38,958,722

—

38,958,722

Switzerland

—

70,284,097

—

70,284,097

Thailand

—

48,596,829

—

48,596,829

United Kingdom

47,830,133

459,195,256

—

507,025,389

United States

424,626,138

305,732,146

—

730,358,284

Total Common Stocks

1,313,145,771

5,503,351,674

0

*

6,816,497,445

Exchange-Traded Equity Funds

89,588,413

—

—

89,588,413

Money Market Funds

15,416,732

—

—

15,416,732

Total Investments in Securities

1,418,150,916

5,503,351,674

0

*

6,921,502,590

Investments in Derivatives

Asset

Forward Foreign Currency Exchange Contracts

—

10,989,199

—

10,989,199

Liability

Forward Foreign Currency Exchange Contracts

—

(5,390,763

)

—

(5,390,763

)

Total

1,418,150,916

5,508,950,110

0

*

6,927,101,026

*

Rounds to zero.

See the Portfolio of Investments for all investment classifications not indicated in the table.

The Fund’s assets assigned to the Level 2 input category are generally valued using the market approach, in which a security’s value is determined through reference to prices and information from market transactions for similar or identical assets. These assets include certain foreign securities for which a third-party statistical pricing service may be employed for purposes of fair market valuation. The model utilized by such third-party statistical pricing service takes into account a security’s correlation to available market data including relevant general and sector indices, currency fluctuations, depositary receipts, and futures, as applicable.

Derivative instruments are valued at unrealized appreciation (depreciation).

The Fund does not hold any significant investments (greater than one percent of net assets) categorized as Level 3.

The accompanying Notes to Financial Statements are an integral part of this statement.

8

Columbia Overseas Value Fund  | 2026


Statement of Assets and Liabilities

August 31, 2026 (Unaudited)

Assets

Investments in securities, at value

Unaffiliated issuers (cost $5,214,968,539)

$6,906,085,858

Affiliated issuers (cost $15,414,166)

15,416,732

Cash

853

Cash collateral held at broker for:

Forward foreign currency exchange contracts

1,080,000

Unrealized appreciation on forward foreign currency exchange contracts

10,989,199

Receivable for:

Investments sold

19,117,221

Capital shares sold

2,854,908

Dividends

13,731,644

Foreign tax reclaims

12,378,464

Prepaid expenses

18,885

Total assets

6,981,673,764

Liabilities

Unrealized depreciation on forward foreign currency exchange contracts

5,390,763

Payable for:

Investments purchased

11,324,373

Capital shares redeemed

6,165,951

Management services fees

415,986

Distribution and/or service fees

11,200

Transfer agent fees

560,841

Compensation of chief compliance officer

523

IRS Closing Agreement for European Union tax reclaim

785,700

Compensation of board members

7,803

Other expenses

410,060

Deferred compensation of board members

366,506

Total liabilities

25,439,706

Net assets applicable to outstanding capital stock

$6,956,234,058

Represented by

Paid in capital

5,475,137,371

Total distributable earnings (loss)

1,481,096,687

Total - representing net assets applicable to outstanding capital stock

$6,956,234,058

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Overseas Value Fund  | 2026

9


Statement of Assets and Liabilities (continued)

August 31, 2026 (Unaudited)

Class A

Net assets

$455,003,487

Shares outstanding

29,899,997

Net asset value per share

$15.22

Maximum sales charge

5.75%

Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares)

$16.15

Class C

Net assets

$13,666,010

Shares outstanding

912,426

Net asset value per share

$14.98

Institutional Class

Net assets

$3,185,617,416

Shares outstanding

208,319,466

Net asset value per share

$15.29

Institutional 2 Class

Net assets

$1,688,342,755

Shares outstanding

111,191,737

Net asset value per share

$15.18

Institutional 3 Class

Net assets

$1,582,387,513

Shares outstanding

103,995,729

Net asset value per share

$15.22

Class R

Net assets

$17,697,706

Shares outstanding

1,204,670

Net asset value per share

$14.69

Class S

Net assets

$13,519,171

Shares outstanding

884,141

Net asset value per share

$15.29

The accompanying Notes to Financial Statements are an integral part of this statement.

10

Columbia Overseas Value Fund  | 2026


Statement of Operations

Six Months Ended August 31, 2026 (Unaudited)

Net investment income

Income:

Dividends — unaffiliated issuers

$171,880,444

Dividends — affiliated issuers

1,244,034

Interfund lending

175

European Union tax reclaim

390,141

Foreign taxes withheld

(16,883,698

)

Total income

156,631,096

Expenses:

Management services fees

24,594,580

Distribution and/or service fees

Class A

558,482

Class C

71,234

Class R

41,729

Transfer agent fees

Class A

290,038

Class C

9,248

Institutional Class

1,984,096

Institutional 2 Class

436,807

Institutional 3 Class

33,623

Class R

10,839

Class S

9,210

Custodian fees

389,202

Printing and postage fees

327,689

Registration fees

185,497

Accounting services fees

17,850

Legal fees

50,542

Interest on collateral

30,788

Compensation of chief compliance officer

527

Compensation of board members

36,493

Deferred compensation of board members

45,483

Other

103,680

Total expenses

29,227,637

Fees waived by transfer agent

Institutional 2 Class

(36,615

)

Total net expenses

29,191,022

Net investment income

127,440,074

Realized and unrealized gain (loss) — net

Net realized gain (loss) on:

Investments — unaffiliated issuers

85,445,275

Investments — affiliated issuers

(25,859

)

Foreign currency translations

(560,716

)

Forward foreign currency exchange contracts

(8,844,172

)

Option contracts purchased

(13,113,934

)

Option contracts written

2,988,734

Net realized gain

65,889,328

Net change in unrealized appreciation (depreciation) on:

Investments — unaffiliated issuers

(156,891,044

)

Investments — affiliated issuers

(6,115

)

Foreign currency translations

(267,539

)

Forward foreign currency exchange contracts

2,472,970

Option contracts purchased

94,893

Option contracts written

(112,914

)

Net change in unrealized appreciation (depreciation)

(154,709,749

)

Net realized and unrealized loss

(88,820,421

)

Net increase in net assets resulting from operations

$38,619,653

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Overseas Value Fund  | 2026

11


Statement of Changes in Net Assets

Six Months Ended

August 31, 2026

(Unaudited)

Year Ended

February 28, 2026

Operations

Net investment income

$127,440,074

$132,330,580

Net realized gain

65,889,328

599,709,678

Net change in unrealized appreciation (depreciation)

(154,709,749

)

1,342,352,193

Net increase in net assets resulting from operations

38,619,653

2,074,392,451

Distributions to shareholders

Net investment income and net realized gains

Class A

(20,338,570

)

(28,910,708

)

Class C

(638,037

)

(866,462

)

Institutional Class

(141,763,257

)

(188,782,345

)

Institutional 2 Class

(76,115,739

)

(108,919,343

)

Institutional 3 Class

(71,595,484

)

(109,490,088

)

Class R

(784,291

)

(1,122,735

)

Class S

(630,511

)

(1,149,104

)

Total distributions to shareholders

(311,865,889

)

(439,240,785

)

Increase in net assets from capital stock activity

366,695,489

2,010,601,266

Total increase in net assets

93,449,253

3,645,752,932

Net assets at beginning of period

6,862,784,805

3,217,031,873

Net assets at end of period

$6,956,234,058

$6,862,784,805

The accompanying Notes to Financial Statements are an integral part of this statement.

12

Columbia Overseas Value Fund  | 2026


Statement of Changes in Net Assets  (continued)

Six Months Ended

Year Ended

August 31, 2026 (Unaudited)

February 28, 2026

Shares

Dollars ($)

Shares

Dollars ($)

Capital stock activity

Class A

Shares sold

1,738,967

25,849,593

6,366,729

88,111,733

Distributions reinvested

1,382,863

19,761,120

1,992,245

28,030,888

Shares redeemed

(2,767,957

)

(41,021,223

)

(5,527,011

)

(74,357,580

)

Net increase

353,873

4,589,490

2,831,963

41,785,041

Class C

Shares sold

150,984

2,232,891

418,190

5,680,973

Distributions reinvested

45,283

638,037

62,246

866,462

Shares redeemed

(236,414

)

(3,458,736

)

(424,468

)

(5,716,712

)

Net increase (decrease)

(40,147

)

(587,808

)

55,968

830,723

Institutional Class

Shares sold

27,732,143

413,093,065

122,374,191

1,706,506,236

Distributions reinvested

9,855,893

141,530,625

13,346,295

188,449,677

Shares redeemed

(22,812,122

)

(339,226,486

)

(31,250,800

)

(430,964,404

)

Net increase

14,775,914

215,397,204

104,469,686

1,463,991,509

Institutional 2 Class

Shares sold

21,926,761

324,162,331

49,369,310

625,071,752

Distributions reinvested

5,331,554

75,974,644

7,754,988

108,724,937

Shares redeemed

(17,216,421

)

(255,552,266

)

(25,316,096

)

(348,669,125

)

Net increase

10,041,894

144,584,709

31,808,202

385,127,564

Institutional 3 Class

Shares sold

8,965,163

132,861,473

29,142,643

396,648,441

Distributions reinvested

3,596,983

51,364,916

5,348,924

75,098,895

Shares redeemed

(12,112,724

)

(180,383,911

)

(25,996,622

)

(350,187,918

)

Net increase

449,422

3,842,478

8,494,945

121,559,418

Class R

Shares sold

193,245

2,770,088

289,980

3,931,441

Distributions reinvested

56,742

783,035

82,188

1,120,225

Shares redeemed

(153,121

)

(2,186,164

)

(526,833

)

(6,999,151

)

Net increase (decrease)

96,866

1,366,959

(154,665

)

(1,947,485

)

Class S

Shares sold

5,936

89,922

30,830

397,952

Distributions reinvested

43,939

630,511

81,381

1,149,104

Shares redeemed

(215,555

)

(3,217,976

)

(170,053

)

(2,292,560

)

Net decrease

(165,680

)

(2,497,543

)

(57,842

)

(745,504

)

Total net increase

25,512,142

366,695,489

147,448,257

2,010,601,266

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Overseas Value Fund  | 2026

13


Financial Highlights

The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The ratios of expenses and net investment income are annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher. A zero balance may reflect an amount rounding to less than $0.01 or 0.01%. 

Net asset value,

beginning of

period

Net

investment

income

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class A

Six Months Ended 8/31/2026 (Unaudited)

$15.92

0.26

(c)

(0.26

)

0.00

(0.25

)

(0.45

)

(0.70

)

Year Ended 2/28/2026

$11.36

0.35

(c)

5.31

5.66

(0.46

)

(0.64

)

(1.10

)

Year Ended 2/28/2025

$10.28

0.31

(c)

1.31

1.62

(0.54

)

—

(0.54

)

Year Ended 2/29/2024

$9.95

0.33

(c)

0.39

0.72

(0.39

)

—

(0.39

)

Year Ended 2/28/2023

$10.11

0.24

(0.24

)

0.00

(0.06

)

(0.10

)

(0.16

)

Year Ended 2/28/2022

$9.99

0.23

0.23

0.46

(0.27

)

(0.07

)

(0.34

)

Class C

Six Months Ended 8/31/2026 (Unaudited)

$15.72

0.21

(c)

(0.27

)

(0.06

)

(0.23

)

(0.45

)

(0.68

)

Year Ended 2/28/2026

$11.25

0.25

(c)

5.23

5.48

(0.37

)

(0.64

)

(1.01

)

Year Ended 2/28/2025

$10.18

0.25

(c)

1.28

1.53

(0.46

)

—

(0.46

)

Year Ended 2/29/2024

$9.86

0.25

(c)

0.39

0.64

(0.32

)

—

(0.32

)

Year Ended 2/28/2023

$10.03

0.17

(0.24

)

(0.07

)

(0.00

)

(0.10

)

(0.10

)

Year Ended 2/28/2022

$9.91

0.16

0.22

0.38

(0.19

)

(0.07

)

(0.26

)

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$15.98

0.28

(c)

(0.26

)

0.02

(0.26

)

(0.45

)

(0.71

)

Year Ended 2/28/2026

$11.39

0.34

(c)

5.37

5.71

(0.48

)

(0.64

)

(1.12

)

Year Ended 2/28/2025

$10.30

0.28

(c)

1.38

1.66

(0.57

)

—

(0.57

)

Year Ended 2/29/2024

$9.98

0.35

(c)

0.39

0.74

(0.42

)

—

(0.42

)

Year Ended 2/28/2023

$10.13

0.25

(0.22

)

0.03

(0.08

)

(0.10

)

(0.18

)

Year Ended 2/28/2022

$10.01

0.26

0.23

0.49

(0.30

)

(0.07

)

(0.37

)

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$15.87

0.29

(c)

(0.27

)

0.02

(0.26

)

(0.45

)

(0.71

)

Year Ended 2/28/2026

$11.32

0.39

(c)

5.29

5.68

(0.49

)

(0.64

)

(1.13

)

Year Ended 2/28/2025

$10.24

0.35

(c)

1.31

1.66

(0.58

)

—

(0.58

)

Year Ended 2/29/2024

$9.92

0.36

(c)

0.39

0.75

(0.43

)

—

(0.43

)

Year Ended 2/28/2023

$10.07

0.26

(0.22

)

0.04

(0.09

)

(0.10

)

(0.19

)

Year Ended 2/28/2022

$9.95

0.27

0.23

0.50

(0.31

)

(0.07

)

(0.38

)

The accompanying Notes to Financial Statements are an integral part of this statement.

14

Columbia Overseas Value Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class A

Six Months Ended 8/31/2026 (Unaudited)

$15.22

0.28%

1.14%

(d)

1.14%

(d)

3.50%

(c)

25%

$455,003

Year Ended 2/28/2026

$15.92

51.05%

1.16%

(d),(e)

1.15%

(d),(e),(f)

2.56%

(c)

57%

$470,327

Year Ended 2/28/2025

$11.36

16.13%

1.19%

(d),(e)

1.16%

(d),(e),(f)

2.85%

(c)

41%

$303,469

Year Ended 2/29/2024

$10.28

7.33%

1.21%

(d),(e),(g)

1.15%

(d),(e),(f),(g)

3.24%

(c)

34%

$287,680

Year Ended 2/28/2023

$9.95

0.15%

1.22%

(d),(e)

1.16%

(d),(e),(f)

2.53%

36%

$300,207

Year Ended 2/28/2022

$10.11

4.65%

1.21%

(d)

1.15%

(d),(f)

2.20%

43%

$338,513

Class C

Six Months Ended 8/31/2026 (Unaudited)

$14.98

(0.10%

)

1.89%

(d)

1.89%

(d)

2.79%

(c)

25%

$13,666

Year Ended 2/28/2026

$15.72

49.89%

1.91%

(d),(e)

1.90%

(d),(e),(f)

1.84%

(c)

57%

$14,973

Year Ended 2/28/2025

$11.25

15.32%

1.94%

(d),(e)

1.91%

(d),(e),(f)

2.27%

(c)

41%

$10,084

Year Ended 2/29/2024

$10.18

6.52%

1.96%

(d),(e),(g)

1.90%

(d),(e),(f),(g)

2.53%

(c)

34%

$13,356

Year Ended 2/28/2023

$9.86

(0.56%

)

1.97%

(d),(e)

1.91%

(d),(e),(f)

1.82%

36%

$15,532

Year Ended 2/28/2022

$10.03

3.88%

1.96%

(d)

1.90%

(d),(f)

1.50%

43%

$19,243

Institutional Class

Six Months Ended 8/31/2026 (Unaudited)

$15.29

0.38%

0.89%

(d)

0.89%

(d)

3.73%

(c)

25%

$3,185,617

Year Ended 2/28/2026

$15.98

51.46%

0.92%

(d),(e)

0.90%

(d),(e),(f)

2.43%

(c)

57%

$3,092,627

Year Ended 2/28/2025

$11.39

16.49%

0.95%

(d),(e)

0.91%

(d),(e),(f)

2.54%

(c)

41%

$1,014,794

Year Ended 2/29/2024

$10.30

7.48%

0.96%

(d),(e),(g)

0.90%

(d),(e),(f),(g)

3.48%

(c)

34%

$470,143

Year Ended 2/28/2023

$9.98

0.46%

0.97%

(d),(e)

0.91%

(d),(e),(f)

2.72%

36%

$489,364

Year Ended 2/28/2022

$10.13

4.91%

0.96%

(d)

0.90%

(d),(f)

2.40%

43%

$518,966

Institutional 2 Class

Six Months Ended 8/31/2026 (Unaudited)

$15.18

0.40%

0.82%

(d)

0.81%

(d)

3.86%

(c)

25%

$1,688,343

Year Ended 2/28/2026

$15.87

51.52%

0.84%

(d),(e)

0.82%

(d),(e)

2.88%

(c)

57%

$1,604,965

Year Ended 2/28/2025

$11.32

16.59%

0.86%

(d),(e)

0.82%

(d),(e)

3.21%

(c)

41%

$784,726

Year Ended 2/29/2024

$10.24

7.61%

0.87%

(d),(e),(g)

0.82%

(d),(e),(g)

3.60%

(c)

34%

$740,968

Year Ended 2/28/2023

$9.92

0.53%

0.88%

(d),(e)

0.82%

(d),(e)

2.85%

36%

$660,833

Year Ended 2/28/2022

$10.07

5.02%

0.88%

(d)

0.82%

(d)

2.52%

43%

$716,539

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Overseas Value Fund  | 2026

15


Financial Highlights (continued)

Net asset value,

beginning of

period

Net

investment

income

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$15.90

0.29

(c)

(0.26

)

0.03

(0.26

)

(0.45

)

(0.71

)

Year Ended 2/28/2026

$11.34

0.39

(c)

5.31

5.70

(0.50

)

(0.64

)

(1.14

)

Year Ended 2/28/2025

$10.26

0.35

(c)

1.31

1.66

(0.58

)

—

(0.58

)

Year Ended 2/29/2024

$9.93

0.36

(c)

0.40

0.76

(0.43

)

—

(0.43

)

Year Ended 2/28/2023

$10.08

0.26

(0.22

)

0.04

(0.09

)

(0.10

)

(0.19

)

Year Ended 2/28/2022

$9.96

0.26

0.24

0.50

(0.31

)

(0.07

)

(0.38

)

Class R

Six Months Ended 8/31/2026 (Unaudited)

$15.41

0.24

(c)

(0.27

)

(0.03

)

(0.24

)

(0.45

)

(0.69

)

Year Ended 2/28/2026

$11.03

0.32

(c)

5.13

5.45

(0.43

)

(0.64

)

(1.07

)

Year Ended 2/28/2025

$9.99

0.28

(c)

1.27

1.55

(0.51

)

—

(0.51

)

Year Ended 2/29/2024

$9.68

0.30

(c)

0.38

0.68

(0.37

)

—

(0.37

)

Year Ended 2/28/2023

$9.84

0.20

(0.22

)

(0.02

)

(0.04

)

(0.10

)

(0.14

)

Year Ended 2/28/2022

$9.73

0.19

0.24

0.43

(0.25

)

(0.07

)

(0.32

)

The accompanying Notes to Financial Statements are an integral part of this statement.

16

Columbia Overseas Value Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Institutional 3 Class

Six Months Ended 8/31/2026 (Unaudited)

$15.22

0.47%

0.77%

(d)

0.77%

(d)

3.88%

(c)

25%

$1,582,388

Year Ended 2/28/2026

$15.90

51.58%

0.79%

(d),(e)

0.77%

(d),(e)

2.89%

(c)

57%

$1,646,052

Year Ended 2/28/2025

$11.34

16.62%

0.81%

(d),(e)

0.77%

(d),(e)

3.16%

(c)

41%

$1,077,420

Year Ended 2/29/2024

$10.26

7.75%

0.82%

(d),(e),(g)

0.77%

(d),(e),(g)

3.55%

(c)

34%

$892,665

Year Ended 2/28/2023

$9.93

0.57%

0.83%

(d),(e)

0.77%

(d),(e)

2.81%

36%

$791,531

Year Ended 2/28/2022

$10.08

5.07%

0.83%

(d)

0.77%

(d)

2.46%

43%

$721,028

Class R

Six Months Ended 8/31/2026 (Unaudited)

$14.69

0.11%

1.40%

(d)

1.40%

(d)

3.25%

(c)

25%

$17,698

Year Ended 2/28/2026

$15.41

50.66%

1.41%

(d),(e)

1.40%

(d),(e),(f)

2.44%

(c)

57%

$17,067

Year Ended 2/28/2025

$11.03

15.91%

1.44%

(d),(e)

1.41%

(d),(e),(f)

2.61%

(c)

41%

$13,921

Year Ended 2/29/2024

$9.99

7.06%

1.46%

(d),(e),(g)

1.40%

(d),(e),(f),(g)

3.04%

(c)

34%

$13,501

Year Ended 2/28/2023

$9.68

(0.05%

)

1.47%

(d),(e)

1.41%

(d),(e),(f)

2.25%

36%

$13,962

Year Ended 2/28/2022

$9.84

4.40%

1.47%

(d)

1.40%

(d),(f)

1.84%

43%

$15,567

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Overseas Value Fund  | 2026

17


Financial Highlights (continued)

Net asset value,

beginning of

period

Net

investment

income

Net

realized

and

unrealized

gain (loss)

Total from

investment

operations

Distributions

from net

investment

income

Distributions

from net

realized

gains

Total

distributions to

shareholders

Class S

Six Months Ended 8/31/2026 (Unaudited)

$15.98

0.29

(c)

(0.27

)

0.02

(0.26

)

(0.45

)

(0.71

)

Year Ended 2/28/2026

$11.39

0.39

(c)

5.32

5.71

(0.48

)

(0.64

)

(1.12

)

Year Ended 2/28/2025(h)

$11.57

0.05

(c)

0.17

0.22

(0.40

)

—

(0.40

)

Notes to Financial Highlights

(a)

In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.

(b)

Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.

(c)

Includes income resulting from European Union tax reclaims. The effect of these amounted to:

Class

Net Investment income per share ($)

Net Investment income ratio (%)

Six Months Ended 8/31/2026 (Unaudited)

Class A

lessthan

 0.01

0.01

Class C

lessthan

 0.01

0.01

Institutional Class

lessthan

 0.01

0.01

Institutional 2 Class

lessthan

 0.01

0.01

Institutional 3 Class

lessthan

 0.01

0.01

Class R

lessthan

 0.01

0.01

Class S

lessthan

 0.01

0.01

Year Ended 2/28/2026

Class A

0.01

0.10

Class C

0.01

0.10

Institutional Class

0.01

0.10

Institutional 2 Class

0.01

0.10

Institutional 3 Class

0.01

0.10

Class R

0.01

0.10

Class S

0.01

0.10

Year Ended 2/28/2025

Class A

0.02

0.15

Class C

0.02

0.15

Institutional Class

0.02

0.15

Institutional 2 Class

0.02

0.15

Institutional 3 Class

0.02

0.15

Class R

0.02

0.15

Class S

0.01

0.15

Year Ended 2/29/2024

Class A

0.04

0.37

Class C

0.04

0.37

Institutional Class

0.04

0.37

Institutional 2 Class

0.04

0.37

Institutional 3 Class

0.04

0.37

Class R

0.04

0.37

(d)

Ratios include interest on collateral expense which is less than 0.01%.

(e)

Ratios include interfund lending expense which is less than 0.01%.

(f)

The benefits derived from expense reductions had an impact of less than 0.01%.

(g)

Ratios include line of credit interest expense which is less than 0.01%.

(h)

Class S shares commenced operations on October 2, 2024. Per share data and total return reflect activity from that date.

The accompanying Notes to Financial Statements are an integral part of this statement.

18

Columbia Overseas Value Fund  | 2026


Financial Highlights (continued)

Net

asset

value,

end of

period

Total

return

Total gross

expense

ratio to

average

net assets(a)

Total net

expense

ratio to

average

net assets(a),(b)

Net investment

income

ratio to

average

net assets

Portfolio

turnover

Net

assets,

end of

period

(000’s)

Class S

Six Months Ended 8/31/2026 (Unaudited)

$15.29

0.38%

0.89%

(d)

0.89%

(d)

3.78%

(c)

25%

$13,519

Year Ended 2/28/2026

$15.98

51.46%

0.91%

(d),(e)

0.90%

(d),(e),(f)

2.86%

(c)

57%

$16,774

Year Ended 2/28/2025

(h)

$11.39

2.08%

0.97%

(d),(e)

0.91%

(d),(e)

1.02%

(c)

41%

$12,619

The accompanying Notes to Financial Statements are an integral part of this statement.

Columbia Overseas Value Fund  | 2026

19


Notes to Financial Statements

August 31, 2026 (Unaudited)

Note 1. Organization

Columbia Overseas Value Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.

Fund shares

The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different net investment income distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.

As described in the Fund’s prospectus, Class A and Class C shares are offered to the general public for investment. Class C shares automatically convert to Class A shares after 8 years. Institutional Class, Institutional 2 Class, Institutional 3 Class, Class R and Class S shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.

Note 2. Summary of significant accounting policies

Basis of preparation

The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification (Topic 946), Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which require management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.

The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.

Segment reporting

The intent of FASB Accounting Standards Update 2023-07, Segment Reporting (Topic 280) - Improvements to Reportable Segment Disclosures is to enable investors to better understand an entity’s overall performance and to assess its potential future cash flows through improved segment disclosures. The chief operating decision maker (CODM) for the Fund is Columbia Management Investment Advisers, LLC through its Investment Oversight Committee and Global Executive Group, which are responsible for assessing performance and making decisions about resource allocation. The CODM has determined that the Fund has a single operating segment because the CODM monitors the operating results of the Fund as a whole and the Fund’s long-term strategic asset allocation is pre-determined in accordance with the terms of its prospectus, based on a defined investment strategy which is executed by the Fund’s portfolio managers as a team. The financial information provided to and reviewed by the CODM is consistent with that presented within the Fund’s financial statements.

Security valuation

Equity securities listed on an exchange are valued at the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. Securities with a closing price not readily available or not listed on any exchange are valued at the mean between the closing bid and ask prices. Listed preferred stocks convertible into common stocks are valued using an evaluated price from a pricing service.

20

Columbia Overseas Value Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Foreign equity securities are valued based on the closing price or last trade price on their primary exchange at the close of business of the New York Stock Exchange. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy approved by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including relevant general and sector indices, currency fluctuations, depositary receipts, and futures, as applicable, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.

Investments in open-end investment companies (other than exchange-traded funds (ETFs)) are valued at the latest net asset value reported by those companies as of the valuation time. 

Forward foreign currency exchange contracts are marked-to-market based upon foreign currency exchange rates provided by a pricing service.

Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.

The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.

GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.

Foreign currency transactions and translations

The values of all assets and liabilities denominated in foreign currencies are generally translated into U.S. dollars at exchange rates determined at the close of regular trading on the New York Stock Exchange. Net realized and unrealized gains (losses) on foreign currency transactions and translations include gains (losses) arising from the fluctuation in exchange rates between trade and settlement dates on securities transactions, gains (losses) arising from the disposition of foreign currency and currency gains (losses) between the accrual and payment dates on dividends, interest income and foreign withholding taxes.

For financial statement purposes, the Fund does not distinguish that portion of gains (losses) on investments which is due to changes in foreign exchange rates from that which is due to changes in market prices of the investments. Such fluctuations are included with the net realized and unrealized gains (losses) on investments in the Statement of Operations.

Derivative instruments

The Fund invests in certain derivative instruments, as detailed below, in seeking to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains

Columbia Overseas Value Fund  | 2026

21


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional exposure of a financial instrument is the nominal or face amount that is used to calculate payments made on that instrument and/or changes in value for the instrument. The notional exposure is a hypothetical underlying quantity upon which payment obligations are computed. Notional exposures provide a gauge for how the Fund may behave given changes in the underlying rate, asset or reference instrument and individual markets. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.

A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally expected to be limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty provides some protection in the case of clearing member default. The clearinghouse stands between the buyer and the seller of the contract; therefore, the primary counterparty credit risk is the risk of failure of the clearinghouse. However, credit risk still exists in exchange-traded and centrally cleared derivatives with respect to any collateral that is held in a broker’s customer accounts. While clearing brokers are required to segregate customer margin from their own assets, in the event that a clearing broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the clearing broker for all its clients and such shortfall is not remedied by the central counterparty or otherwise, U.S. bankruptcy laws will typically allocate that shortfall on a pro rata basis across all the clearing broker’s customers (including the Fund) by account class, potentially resulting in losses to the Fund.

In connection with certain over-the-counter derivatives, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and forward foreign currency exchange contracts and contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instruments’ payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.

Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or central counterparty for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms for most over-the-counter derivatives are subject to regulatory requirements to exchange variation margin with trading counterparties and may have contract specific margin terms as well. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker or receive interest income on cash collateral pledged to the broker. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.

Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty.  The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement.  In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.

22

Columbia Overseas Value Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.

Forward foreign currency exchange contracts

Forward foreign currency exchange contracts are over-the-counter agreements between two parties to buy and sell a currency at a set price on a future date. The Fund utilized forward foreign currency exchange contracts to hedge portfolio currency risk and to facilitate transactions in securities denominated in foreign currencies in the normal course of pursuing its investment objectives. These contracts are used to protect against a decline in value relative to the U.S. dollar of the currencies in which portfolio securities are denominated or quoted (or an increase in the value of a currency in which securities that a Fund intends to buy are denominated, when a Fund holds cash reserves and short-term investments), or for other investment purposes. These instruments may be used for other purposes in future periods.

The values of forward foreign currency exchange contracts fluctuate daily with changes in foreign currency exchange rates. Changes in the value of these contracts are recorded as unrealized appreciation or depreciation until the contract is exercised or has expired. The Fund will realize a gain or loss when the forward foreign currency exchange contract is closed or expires. Non-deliverable forward foreign currency exchange contracts are settled with the counterparty in U.S. dollars without delivery of foreign currency.

The use of forward foreign currency exchange contracts does not eliminate fluctuations in the prices of the Fund’s portfolio securities. The risks of forward foreign currency exchange contracts include movement in the values of the foreign currencies relative to the U.S. dollar (or other foreign currencies) and the possibility that counterparties will not complete their contractual obligations, which may be in excess of the amount reflected, if any, in the Statement of Assets and Liabilities.

Options contracts

Options are contracts which entitle the holder to purchase or sell securities or other identified assets at a specified price, or in the case of index option contracts, to receive or pay the difference between the index value and the strike price of the index option contract. Option contracts can be either exchange-traded or over-the-counter. The Fund may use options that are written or purchased to enhance returns or to hedge an existing position or future investment. A Fund may write call and put options on securities and financial derivative instruments it owns or in which it may invest. Writing put options tends to increase a Fund’s exposure to the underlying instrument. Writing call options tends to decrease a Fund’s exposure to the underlying instrument. When a Fund writes a call or put, an amount equal to the premium received is recorded and subsequently marked to market to reflect the current value of the option written. These instruments may be used for other purposes in future periods. Completion of transactions for option contracts traded in the over-the-counter market depends upon the performance of the other party. Collateral may be collected or posted by the Fund to secure over-the-counter option contract trades. Collateral held or posted by the Fund for such option contract trades must be returned to the broker or the Fund upon closure, exercise or expiration of the contract.

Options contracts purchased are recorded as investments. When the Fund writes an options contract, the premium received is recorded as an asset and an amount equivalent to the premium is recorded as a liability in the Statement of Assets and Liabilities and is subsequently adjusted to reflect the current fair value of the option written. Changes in the fair value of the written option are recorded as unrealized appreciation or depreciation until the contract is exercised or has expired. The Fund realizes a gain or loss when the option contract is closed or expires. When option contracts are exercised, the proceeds on sales for a written call or purchased put option contract, or the purchase cost for a written put or purchased call option contract, is adjusted by the amount of premium received or paid.

For over-the-counter options purchased, the Fund bears the risk of loss of the amount of the premiums paid plus the positive change in market values net of any collateral held by the Fund should the counterparty fail to perform under the contracts. Option contracts written by the Fund do not typically give rise to significant counterparty credit risk, as options written generally obligate the Fund and not the counterparty to perform. The risk in writing a call option contract is that the Fund gives up the opportunity for profit if the market price of the security increases above the strike price and the option contract is exercised. The risk in writing a put option contract is that the Fund may incur a loss if the market price of the security decreases below the strike price and the option contract is exercised. Exercise of a written option could result in the

Columbia Overseas Value Fund  | 2026

23


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Fund purchasing or selling a security or foreign currency when it otherwise would not, or at a price different from the current market value. In purchasing and writing options, the Fund bears the risk of an unfavorable change in the value of the underlying instrument or the risk that the Fund may not be able to enter into a closing transaction due to an illiquid market.

Effects of derivative transactions in the financial statements

The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.

The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at August 31, 2026: 

Asset derivatives

Risk exposure

category

Statement

of assets and liabilities

location

Fair value ($)

Foreign exchange risk

Unrealized appreciation on forward foreign currency exchange contracts

10,989,199

Liability derivatives

Risk exposure

category

Statement

of assets and liabilities

location

Fair value ($)

Foreign exchange risk

Unrealized depreciation on forward foreign currency exchange contracts

5,390,763

The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the six months ended August 31, 2026: 

Amount of realized gain (loss) on derivatives recognized in income

Risk exposure category

Forward

foreign

currency

exchange

contracts

($)

Option

contracts

purchased

($)

Option

contracts

written

($)

Total

($)

Equity risk

—

(13,113,934

)

2,988,734

(10,125,200

)

Foreign exchange risk

(8,844,172

)

—

—

(8,844,172

)

Total

(8,844,172

)

(13,113,934

)

2,988,734

(18,969,372

)

Change in unrealized appreciation (depreciation) on derivatives recognized in income

Risk exposure category

Forward

foreign

currency

exchange

contracts

($)

Option

contracts

purchased

($)

Option

contracts

written

($)

Total

($)

Equity risk

—

94,893

(112,914

)

(18,021

)

Foreign exchange risk

2,472,970

—

—

2,472,970

Total

2,472,970

94,893

(112,914

)

2,454,949

24

Columbia Overseas Value Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

The following table is a summary of the average daily outstanding volume by derivative instrument for the six months ended August 31, 2026: 

Derivative instrument

Average

value ($)

Option contracts purchased

1,433,359

Option contracts written

(216,538

)

Derivative instrument

Average unrealized

appreciation ($)

Average unrealized

depreciation ($)

Forward foreign currency exchange contracts

20,033,464

(20,401,698

)

Offsetting of assets and liabilities

The following table presents the Fund’s gross and net amount of assets and liabilities available for offset under netting arrangements with counterparties as well as any related collateral received or pledged by the Fund as of August 31, 2026: 

Barclays

Citi

Goldman

Sachs

International

HSBC

JPMorgan

Morgan

Stanley

UBS

Total

Assets

Forward foreign currency exchange contracts

$

526,628

2,544,432

-

971,756

5,560,936

13,669

1,371,778

10,989,199

Liabilities

Forward foreign currency exchange contracts

$

-

261,817

1,563,198

1,304,101

-

2,117,639

144,008

5,390,763

Total financial and derivative net assets

526,628

2,282,615

(1,563,198

)

(332,345

)

5,560,936

(2,103,970

)

1,227,770

5,598,436

Total collateral received (pledged) (a)

-

-

(1,080,000

)

-

-

-

-

(1,080,000

)

Net amount (b)

$

526,628

2,282,615

(483,198

)

(332,345

)

5,560,936

(2,103,970

)

1,227,770

6,678,436

(a)

In some instances, the actual collateral received and/or pledged may be more than the amount shown due to overcollateralization.

(b)

Represents the net amount due from/(to) counterparties in the event of default.

Security transactions

Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.

Income recognition

Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of an ex-dividend notification in the case of certain foreign securities.

The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.

Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.

Columbia Overseas Value Fund  | 2026

25


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Expenses

General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.

Determination of class net asset value

All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.

Federal income tax status

The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.

Foreign taxes

The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.

Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability in the Statement of Assets and Liabilities.

The Fund may file withholding tax reclaims in certain European Union countries to recover a portion of foreign taxes previously withheld on dividends earned, which may be reclaimable based upon certain provisions in the Treaty on the Functioning of the European Union (EU) and subsequent rulings by the European Court of Justice. The Fund may record a reclaim receivable when the amount is known, the Fund has received notice of a pending refund, and there are no significant uncertainties on collectability. Income received from EU reclaims is included in the Statement of Operations.

The Fund is seeking a closing agreement with the Internal Revenue Service to address any prior years’ U.S. income tax liabilities attributable to Fund shareholders resulting from the recovery of European Union tax reclaims. The closing agreement will result in the Fund paying a portion of those taxes refunded to the IRS, on behalf of its shareholders, representing the estimated tax savings generated from foreign tax credits claimed by Fund shareholders on their tax returns in the prior years. The Fund has accrued a liability for the estimated IRS Closing Agreement costs, which is disclosed on the Statement of Assets and Liabilities. The actual amount may differ from the estimate due to additional reclaims received or interest due and that difference may be material.

Distributions to shareholders

Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.

Guarantees and indemnifications

Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.

26

Columbia Overseas Value Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Note 3. Fees and other transactions with affiliates

Management services fees

The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice and is responsible for administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.87% to 0.67% as the Fund’s net assets increase. The annualized effective management services fee rate for the six months ended August 31, 2026 was 0.73% of the Fund’s average daily net assets.

Compensation of Board members

Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund. The expense for the Deferred Plan, which includes Trustees’ fees deferred during the current period as well as any gains or losses on the Trustees’ deferred compensation balances as a result of market fluctuations, is included in "Deferred compensation of board members" in the Statement of Operations.

Compensation of Chief Compliance Officer

The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.

Transfer agency fees

Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with SS&C GIDS, Inc. (SS&C GIDS) to serve as sub-transfer agent. The Transfer Agent pays the fees of SS&C GIDS for services as sub-transfer agent and SS&C GIDS is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).

The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.

The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class. In addition, effective July 1, 2026 through June 30, 2027, Institutional 2 Class shares are subject to a contractual transfer agency fee annual limitation of not more than 0.04% of the average daily net assets attributable to that share class.

Columbia Overseas Value Fund  | 2026

27


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

For the six months ended August 31, 2026, the Fund’s annualized effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows: 

Effective rate (%)

Class A

0.13

Class C

0.13

Institutional Class

0.13

Institutional 2 Class

0.05

Institutional 3 Class

0.00

Class R

0.13

Class S

0.13

An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the six months ended August 31, 2026, no minimum account balance fees were charged by the Fund.

Distribution and service fees

The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.

Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class C shares of the Fund and a monthly distribution fee to the Distributor at the maximum annual rates of 0.75% and 0.50% of the average daily net assets attributable to Class C and Class R shares of the Fund, respectively.

Sales charges

Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the six months ended August 31, 2026, if any, are listed below: 

Front End (%)

CDSC (%)

Amount ($)

Class A

5.75

0.50 - 1.00

(a)

153,037

Class C

—

1.00

(b)

1,097

(a)

This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.

(b)

This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.

The Fund’s other share classes are not subject to sales charges.

28

Columbia Overseas Value Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Expenses waived/reimbursed by the Investment Manager and its affiliates

The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the classes’ average daily net assets: 

July 1, 2026

through

June 30, 2027 (%)

Prior to

July 1, 2026 (%)

Class A

1.20

1.16

Class C

1.95

1.91

Institutional Class

0.95

0.91

Institutional 2 Class

0.86

0.82

Institutional 3 Class

0.82

0.78

Class R

1.45

1.41

Class S

0.95

0.91

Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, costs associated with shareholder meetings, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Reflected in the contractual cap commitment, effective July 1, 2026 through June 30, 2027, is the Transfer Agent’s contractual agreement to limit total transfer agency fees to an annual rate of not more than 0.04% for Institutional 2 Class of the average daily net assets attributable to that share class, unless sooner terminated at the sole discretion of the Board of Trustees. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.

Note 4. Federal tax information

The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.

At August 31, 2026, the approximate cost of all investments for federal income tax purposes and the aggregate gross approximate unrealized appreciation and depreciation based on that cost was: 

Federal

tax cost ($)

Gross unrealized

appreciation ($)

Gross unrealized

(depreciation) ($)

Net unrealized

appreciation ($)

5,230,383,000

1,893,111,000

(196,393,000

)

1,696,718,000

Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.

The following capital loss carryforwards, determined at February 28, 2026, may be available to reduce future net realized gains on investments, if any, to the extent permitted by the Internal Revenue Code.  

No expiration

short-term ($)

No expiration

long-term ($)

Total ($)

—

(259,785,178

)

(259,785,178

)

Columbia Overseas Value Fund  | 2026

29


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.

Note 5. Portfolio information

The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $1,783,174,551 and $1,626,128,595, respectively, for the six months ended August 31, 2026. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.

Note 6. Affiliated money market fund

The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. The Securities and Exchange Commission has adopted amendments to money market fund rules requiring institutional prime money market funds like the Affiliated MMF to be subject to a discretionary liquidity fee of up to 2% if the imposition of such a fee is determined to be in the best interest of the Affiliated MMF and to a mandatory liquidity fee if daily net redemptions exceed 5% of net assets.

Note 7. Interfund lending

Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.

Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.

The Fund’s activity in the Interfund Program during the six months ended August 31, 2026 was as follows: 

Borrower or lender

Average loan

balance ($)

Weighted average

interest rate (%)

Number of days

with outstanding loans

Lender

500,000

4.21

3

Interest income earned by the Fund is recorded as Interfund lending in the Statement of Operations. The Fund had no outstanding interfund loans at August 31, 2026.

Note 8. Line of credit

Effective October 22, 2026, the Fund has access to a revolving credit facility with a syndicate of banks led by State Street Bank and Trust Company, Citibank, N.A. and Wells Fargo Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is an agreement between the Fund and certain other funds managed by the Investment Manager, severally and not jointly, permits aggregate borrowings up to $750 million. Interest is currently charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate and (ii) the overnight bank funding rate, plus 1.00% in each case. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in October

30

Columbia Overseas Value Fund  | 2026


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

unless extended or renewed. Prior to October 22, 2026, the Fund had access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A., which permitted aggregate borrowings up to $750 million. Interest was charged to each participating fund based on its borrowings at a rate equal to the highest of (i) the federal funds effective rate, (ii) the secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate, plus 1.00% in each case.

The Fund had no borrowings during the six months ended August 31, 2026.

Note 9. Risks and uncertainties

An investment in the Fund involves risks, including market risk and concentration risk, among others. The value of the Fund’s holdings and the Fund’s net asset value may go down. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally.

Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, other conflicts, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.

To the extent that the Fund concentrates its investment in particular issuers, countries, geographic regions, industries or sectors, the Fund may be subject to greater risks of adverse developments in such areas of focus than a fund that invests in a wider variety of issuers, countries, geographic regions, industries, sectors or investments.

Additional risk factors of the Fund are described more fully in the Fund’s Prospectus and Statement of Additional Information.

Shareholder concentration risk

At August 31, 2026, two unaffiliated shareholders of record owned 42.4% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Fund shares sold to or redeemed by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.

Note 10. Subsequent events

Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.

Note 11. Information regarding pending and settled legal proceedings

Ameriprise Financial and certain of its affiliates are involved, in the normal course of business, in legal proceedings that include regulatory inquiries, arbitration and litigation (including class actions) concerning matters arising in connection with the conduct of their activities as part of a diversified financial services firm. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.

Columbia Overseas Value Fund  | 2026

31


Notes to Financial Statements (continued)

August 31, 2026 (Unaudited)

There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, it is inherently difficult to determine whether any loss is probable or even reasonably possible, or to reasonably estimate the amount of any loss that may result from such matters. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief, and may lead to further claims, examinations, adverse publicity or reputational damage, each of which could have a material adverse effect on the consolidated financial condition or results of operations or financial condition of Ameriprise Financial or one or more of its affiliates that provide services to the Fund.

32

Columbia Overseas Value Fund  | 2026


 Approval of Management Agreement

(Unaudited)

Columbia Management Investment Advisers, LLC (the Investment Manager, and together with its domestic and global affiliates, Columbia Threadneedle Investments), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial), serves as the investment manager to Columbia Overseas Value Fund (the Fund). Under a management agreement (the Management Agreement), the Investment Manager provides investment advice and other services to the Fund. The Investment Manager also provides investment advice and other services to other funds in the Columbia Fund family (collectively, the Funds).

On an annual basis, the Fund’s Board of Trustees (the Board), including the independent Board members (the Independent Trustees), considers renewal of the Management Agreement. The Investment Manager prepared detailed reports for the Board and its Contracts Committee (including its Contracts Subcommittee) in March, April and June 2026, including reports providing the results of analyses performed by a third-party data provider, Broadridge Financial Solutions, Inc. (Broadridge), and comprehensive responses by the Investment Manager to written requests for information by independent legal counsel to the Independent Trustees (Independent Legal Counsel), to assist the Board in making this determination. In addition, throughout the year, the Board (or its committees or subcommittees) regularly meets with portfolio management teams and senior management personnel and reviews information prepared by the Investment Manager addressing the services the Investment Manager provides and Fund performance. The Board also accords appropriate weight to the work, deliberations and conclusions of the various committees (including their subcommittees), such as the Contracts Committee, the Investment Review Committee, the Audit Committee and the Compliance Committee, in determining whether to continue the Management Agreement.

The Board, at its June 18, 2026 Board meeting (the June Meeting), considered the renewal of the Management Agreement for an additional one-year term. At the June Meeting, Independent Legal Counsel reviewed with the Independent Trustees various factors relevant to the Board’s consideration of advisory agreements and the Board’s legal responsibilities related to such consideration. The Independent Trustees considered such information as they, their legal counsel or the Investment Manager believed reasonably necessary to evaluate and to approve the continuation of the Management Agreement.  Among other things, the information and factors considered included the following:

•

Information on the investment performance of the Fund relative to the performance of a group of mutual funds determined to be comparable to the Fund by Broadridge, as well as performance relative to one or more benchmarks; 

•

Information on the Fund’s management fees and total expenses, including information comparing the Fund’s expenses to those of a group of comparable mutual funds, as determined by Broadridge; 

•

The Investment Manager’s agreement to contractually limit or cap total operating expenses for the Fund so that total operating expenses (excluding certain fees and expenses, such as transaction costs and certain other investment related expenses, interest, taxes, acquired fund fees and expenses and infrequent and/or unusual expenses) would not exceed a specified annual rate, as a percentage of the Fund’s net assets;

•

Terms of the Management Agreement;

•

Descriptions of other agreements and arrangements with affiliates of the Investment Manager relating to the operations of the Fund, including agreements with respect to the provision of transfer agency and shareholder services to the Fund;

•

Descriptions of various services performed by the Investment Manager under the Management Agreement, including portfolio management and portfolio trading practices;

•

Information regarding any recently negotiated management fees of similarly-managed portfolios of other institutional clients of the Investment Manager;

•

Information regarding the resources of the Investment Manager, including information regarding senior management, portfolio managers and other personnel;

•

Information regarding the capabilities of the Investment Manager with respect to compliance monitoring services; 

•

The profitability to the Investment Manager and its affiliates from their relationships with the Fund; and

Columbia Overseas Value Fund  | 2026

33


Approval of Management Agreement (continued)

(Unaudited)

•

Report provided by the Board’s independent fee consultant, JDL Consultants, LLC (JDL).

Following an analysis and discussion of the foregoing, and the factors identified below, the Board, including all of the Independent Trustees, approved the renewal of the Management Agreement.

Nature, extent and quality of services provided by the Investment Manager

The Board analyzed various reports and presentations it had received detailing the services performed by the Investment Manager, as well as its history, expertise, resources and relative capabilities, and the qualifications of its personnel.

The Board specifically considered the many developments during recent years concerning the services provided by the Investment Manager. Among other things, the Board noted the organization and depth of the equity and credit research departments. The Board further observed the enhancements to the investment risk management department’s processes, systems and oversight over the past several years. The Board also took into account the broad scope of services provided by the Investment Manager to the Fund, including, among other services, investment, risk and compliance oversight. The Board also took into account the information it received concerning the Investment Manager’s ability to attract and retain key portfolio management personnel and that it has sufficient resources to provide competitive and adequate compensation to investment personnel.

In connection with the Board’s evaluation of the overall package of services provided by the Investment Manager, the Board also considered the nature, quality and range of administrative services provided to the Fund by the Investment Manager, as well as the achievements in 2025 in the performance of administrative services, and noted the various enhancements anticipated for 2026. In evaluating the quality of services provided under the Management Agreement, the Board also took into account the organization and strength of the Fund’s and its service providers’ compliance programs. The Board also reviewed the financial condition of the Investment Manager and its affiliates and each entity’s ability to carry out its responsibilities under the Management Agreement and the Fund’s other service agreements.

In addition, the Board discussed the acceptability of the terms of the Management Agreement, noting that no changes were proposed from the form of agreement previously approved. The Board also noted the wide array of legal and compliance services provided to the Fund under the Management Agreement.

After reviewing these and related factors (including investment performance as discussed below), the Board concluded, within the context of its overall conclusions, that the nature, extent and quality of the services provided to the Fund under the Management Agreement supported the continuation of the Management Agreement.

Investment performance

The Board carefully reviewed the investment performance of the Fund, including detailed reports providing the results of analyses performed by each of the Investment Manager, Broadridge and JDL collectively showing, for various periods (including since manager inception): (i) the performance of the Fund, (ii) the Fund’s performance relative to peers and benchmarks and (iii) the net assets of the Fund. The Board observed that the Fund’s performance for certain periods ranked above median relative to its peers based on information provided by Broadridge.

The Board also reviewed a description of the third-party data provider’s methodology for identifying the Fund’s peer groups for purposes of performance and expense comparisons. 

The Board also considered the Investment Manager’s performance and reputation generally.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the performance of the Fund and the Investment Manager, in light of other considerations, supported the continuation of the Management Agreement. 

Comparative fees, costs of services provided and the profits realized by the Investment Manager and its affiliates from their relationships with the Fund

The Board reviewed comparative fees and the costs of services provided under the Management Agreement.  The Board members considered detailed comparative information set forth in an annual report on fees and expenses, including, among other things, data (based on analyses conducted by Broadridge and JDL) showing a comparison of the Fund’s expenses

34

Columbia Overseas Value Fund  | 2026


Approval of Management Agreement (continued)

(Unaudited)

with median expenses paid by funds in its comparative peer universe, as well as data showing the Fund’s contribution to the Investment Manager’s profitability. The Board reviewed the fees charged to comparable institutional or other accounts/vehicles managed by the Investment Manager, including vehicles subadvised by the Investment Manager, and discussed differences in how the products are managed and operated, thus explaining many of the differences in fees.

The Board considered the reports of JDL, which assisted in the Board’s analysis of the Funds’ performance and expenses and the reasonableness of the Funds’ fee rates. The Board accorded particular weight to the notion that a primary objective of the level of fees is to achieve a rational pricing model applied consistently across the various product lines in the Fund family, while assuring that the overall fees for each Fund (with certain exceptions) are generally in line with the current “pricing philosophy” such that Fund total expense ratios, in general, approximate or are lower than the median expense ratios of funds in the same Lipper comparison universe. The Board took into account that the Fund’s total expense ratio (after considering proposed expense caps/waivers) was slightly below the peer universe’s median expense ratio shown in the reports. 

After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the levels of management fees and expenses of the Fund, in light of other considerations, supported the continuation of the Management Agreement.

The Board also considered the profitability of the Investment Manager and its affiliates in connection with the Investment Manager providing management services to the Fund. With respect to the profitability of the Investment Manager and its affiliates, the Independent Trustees referred to information discussing the profitability to the Investment Manager and Ameriprise Financial from managing, operating and distributing the Funds. The Board considered that the profitability generated by the Investment Manager in 2025 had increased slightly from 2024 levels due to a variety of factors, including the increased assets under management of the Funds.  It also took into account the indirect economic benefits flowing to the Investment Manager or its affiliates in connection with managing or distributing the Funds, such as the enhanced ability to offer various other financial products to Ameriprise Financial customers, soft dollar benefits and overall reputational advantages. The Board noted that the fees paid by the Fund should permit the Investment Manager to offer competitive compensation to its personnel, make necessary investments in its business and earn an appropriate profit.  After reviewing these and related factors, the Board concluded, within the context of its overall conclusions, that the costs of services provided and the profitability to the Investment Manager and its affiliates from their relationships with the Fund supported the continuation of the Management Agreement.

Economies of scale

The Board considered the potential existence of economies of scale in the provision by the Investment Manager of services to the Fund, and whether those economies of scale were shared with the Fund through breakpoints in investment management fees or other means, such as expense limitation arrangements and additional investments by the Investment Manager in investment, trading, compliance and other resources. The Board considered the economies of scale that might be realized as the Fund’s net asset level grows and took note of the extent to which Fund shareholders might also benefit from such growth. In this regard, the Board took into account that management fees decline as Fund assets exceed various breakpoints, all of which have not been surpassed. The Board observed that the Management Agreement thus provides for breakpoints in the management fee rate schedule that allow opportunities for shareholders to realize lower fees as Fund assets grow and that there are additional opportunities through other means for sharing economies of scale with shareholders. 

Conclusion

The Board reviewed all of the above considerations in reaching its decision to approve the continuation of the Management Agreement. In reaching its conclusions, no single factor was determinative. 

On June 18, 2026, the Board, including all of the Independent Trustees, determined that fees payable under the Management Agreement were fair and reasonable in light of the extent and quality of services provided and approved the renewal of the Management Agreement.

Columbia Overseas Value Fund  | 2026

35


Columbia Overseas Value Fund

P.O. Box 219104

Kansas City, MO 64121-9104

  

Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.

Columbia Threadneedle Investments® (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.

© 2026 Columbia Management Investment Advisers, LLC.

columbiathreadneedleus.com/investor/

SAR208_(10/26)



Item 8. Changes in and Disagreements with Accountants for Open-End Management Investment Companies.

Not applicable.

Item 9. Proxy Disclosures for Open-End Management Investment Companies.

Not applicable.

Item 10. Remuneration Paid to Directors, Officers, and Others of Open-End Management Investment Companies.

The fees and expenses of the independent trustees are included in “Compensation of board members” and “Deferred compensation of board members” on each Fund’s Statement of Operations as part of the Registrant’s financial statements filed under Item 7 of this Form N-CSR. Additionally, the compensation paid by the Trust to the Chief Compliance Officer is included in “Compensation of chief compliance officer” on each Fund’s Statement of Operations as part of the Registrant’s financial statements filed under Item 7 of this Form N-CSR.

Item 11. Statement Regarding Basis for Approval of Investment Advisory Contract.

Statement regarding basis for approval of Investment Advisory Contract is included in Item 7 of this Form N-CSR.


Item 12. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies.

Not applicable.

Item 13. Portfolio Managers of Closed-End Management Investment Companies.

Not applicable.

Item 14. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers.

Not applicable.

Item 15. Submission of Matters to a Vote of Security Holders.

There were no material changes to the procedures by which shareholders may recommend nominees to the registrant’s board of trustees implemented since the registrant last provided disclosure as to such procedures in response to the requirements of Item 407(c)(2)(iv) of Regulation S-K or Item 15 of Form N-CSR.

Item 16. Controls and Procedures.

(a) The registrant’s principal executive officer and principal financial officer, based on their evaluation of the registrant’s disclosure controls and procedures as of a date within 90 days of the filing of this report, have concluded that such controls and procedures are effective and adequately designed to ensure that information required to be disclosed by the registrant in Form N-CSR is accumulated and communicated to the registrant’s management, including the principal executive officer and principal financial officer, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

(b) There was no change in the registrant’s internal control over financial reporting that occurred during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 17. Disclosure of Securities Lending Activities for Closed-End Management Investment Companies.

Not applicable.

Item 18. Recovery of Erroneously Awarded Compensation.

Not applicable.

Item 19. Exhibits.

(a)(1) Code of ethics required to be disclosed under Item 2 of Form N-CSR. Not applicable for semiannual reports.

(a)(2) Not applicable.


(a)(3) Certifications pursuant to Rule 30a-2(a) under the Investment Company Act of 1940 (17 CFR 270.30a-2(a)) attached hereto as Exhibit 99.CERT.

(a)(4) Not applicable.

(a)(5) Not applicable.

(b) Certification pursuant to Rule 30a-2(b) under the Investment Company Act of 1940 (17 CFR 270.30a-2(b)) attached hereto as Exhibit 99.906CERT.


SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Columbia Funds Series Trust
By:   /s/ Michael G. Clarke
Name:   Michael G. Clarke
Title:   President and Principal Executive Officer
Date:   October 23, 2026

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:   /s/ Michael G. Clarke
Name:   Michael G. Clarke
Title:   President and Principal Executive Officer
Date:   October 23, 2026
By:   /s/ Charles H. Chiesa
Name:   Charles H. Chiesa
Title:   Treasurer, Chief Financial Officer, Chief Accounting Officer and Principal Financial Officer
Date:   October 23, 2026

View source ↗ · 中文页面