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MFS Active Exchange Traded Funds Trust (0002018846) (Filer)

SEC · EDGAR 财务披露 · October 28, 2026 at 8:56 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

811-23953

MFS ACTIVE EXCHANGE TRADED FUNDS TRUST

(Exact name of registrant as specified in charter)


111 Huntington Avenue, Boston, Massachusetts 02199

(Address of principal executive offices) (Zip code)

Christopher R. Bohane

Massachusetts Financial Services Company

111 Huntington Avenue

Boston, Massachusetts 02199

(Name and address of agents for service)

Registrant's telephone number, including area code:

(617) 954-5000

Date of fiscal year end:

February 28

Date of reporting period:

August 31, 2026

This Form N-CSR pertains to the following series of the Registrant: MFS Active Core Plus Bond ETF, MFS Active Growth ETF, MFS Active Intermediate Muni Bond ETF, MFS Active International ETF, MFS Active Value ETF, MFS Active Mid Cap ETF, MFS Blended Research International Equity ETF, MFS Blended Research Core Equity ETF, MFS Active International Value ETF, MFS Blended Research Small-Mid Cap ETF, and MFS Blended Research Emerging Markets Equity ETF. MFS Blended Research Emerging Markets Equity ETF commenced investment operations on March 5, 2026. MFS Active International Value ETF and MFS Blended Research Small-Mid Cap ETF commenced investment operations on June 4, 2026.

ITEM 1.  REPORTS TO STOCKHOLDERS.

Item 1(a):

MFSLOGO_RED.EPS

MFS® Active Core Plus Bond ETF

Principal Listing Exchange: NYSE

TSR_Ribbon_red

MFSB

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Active Core Plus Bond ETF for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at etfs.mfs.com. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to [email protected].

FUND EXPENSES

What were the fund costs for the last six months?

(based on a hypothetical $10,000 investment)
Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
MFS Active Core Plus Bond ETF $17 0.34%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 551,107,936 Average Effective Maturity (yrs): 9.1
Total Number of Holdings: 464 Average Effective Duration (yrs): 5.8
Portfolio Turnover Rate (%): 24

Where the fund holds derivatives, they are not included in the total number of portfolio holdings.

PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 8/31/26)

Portfolio structure

Fixed Income 97.3%
Money Market Funds 2.7%

Composition including fixed income credit quality

AAA 9.7%
AA 4.6%
A 13.4%
BBB 27.6%
BB 6.6%
B 4.0%
CCC 0.7%
U.S. Government 23.9%
Federal Agencies 6.8%
Money Market Funds 2.7%

Ratings are assigned using Moody’s, Fitch, and Standard & Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&P and Fitch scale (e.g., AAA). All ratings are subject to change.

ADDITIONAL INFORMATION

You can find the fund’s summary prospectus, prospectus, most recent annual and semiannual reports, financial information, portfolio holdings, and statement of additional information online at etfs.mfs.com. Proxy voting information is available without charge by calling 1‑800‑637‑5637, by visiting mfs.com/proxyvoting, or by visiting the SEC’s website at http://www.sec.gov.

IMPORTANT NOTICE REGARDING DELIVERY OF SHAREHOLDER MATERIALS

The fund produces financial annual and semiannual reports and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund's annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund's records. However, any shareholder may contact the fund at 1-800-637-5637 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

ECP-SEM

MFSLOGO_RED.EPS

MFS® Active Growth ETF

Principal Listing Exchange: NYSE

TSR_Ribbon_red

MFSG

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Active Growth ETF for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at etfs.mfs.com. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to [email protected].

FUND EXPENSES

What were the fund costs for the last six months?

(based on a hypothetical $10,000 investment)
Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
MFS Active Growth ETF $26 0.49%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 379,210,722 Portfolio Turnover Rate (%): 28
Total Number of Holdings: 68

Where the fund holds derivatives, they are not included in the total number of portfolio holdings.

PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 8/31/26)

Portfolio structure

Equities 99.3%
Money Market Funds 0.7%

Equity sectors

Information Technology 46.7%
Communication Services 16.0%
Industrials 9.1%
Consumer Discretionary 8.1%
Health Care 7.2%
Financials 6.4%
Consumer Staples 1.9%
Energy 1.8%
Materials 1.8%
Real Estate 0.3%

Top ten holdings

NVIDIA Corp. 14.3%
Alphabet, Inc., "A" 11.2%
Apple, Inc. 6.0%
Microsoft Corp. 5.3%
Broadcom, Inc. 3.4%
Visa, Inc., "A" 3.3%
Amazon.com, Inc. 2.9%
Meta Platforms, Inc., "A" 2.3%
Arista Networks, Inc. 2.0%
GE Vernova, Inc. 1.9%

MFS uses the Global Industry Classification Standard (GICS®) for sector/industry reporting. MFS has applied its own internal sector/industry classification methodology for equity securities and non-equity securities that are unclassified by GICS.

ADDITIONAL INFORMATION

You can find the fund’s summary prospectus, prospectus, most recent annual and semiannual reports, financial information, portfolio holdings, and statement of additional information online at etfs.mfs.com. Proxy voting information is available without charge by calling 1‑800‑637‑5637, by visiting mfs.com/proxyvoting, or by visiting the SEC’s website at http://www.sec.gov.

IMPORTANT NOTICE REGARDING DELIVERY OF SHAREHOLDER MATERIALS

The fund produces financial annual and semiannual reports and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund's annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund's records. However, any shareholder may contact the fund at 1-800-637-5637 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

EGO-SEM

MFSLOGO_RED.EPS

MFS® Active Intermediate Muni Bond ETF

Principal Listing Exchange: NYSE

TSR_Ribbon_red

MFSM

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Active Intermediate Muni Bond ETF for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at etfs.mfs.com. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to [email protected].

FUND EXPENSES

What were the fund costs for the last six months?

(based on a hypothetical $10,000 investment)
Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
MFS Active Intermediate Muni Bond ETF $17 0.34%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 103,765,078 Average Effective Maturity (yrs): 8.6
Total Number of Holdings: 419 Average Effective Duration (yrs): 6.4
Portfolio Turnover Rate (%): 17

Where the fund holds derivatives, they are not included in the total number of portfolio holdings.

PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 8/31/26)

Portfolio structure

Fixed Income 98.1%
Money Market Funds 1.9%

Composition including fixed income credit quality

AAA 2.5%
AA 40.2%
A 31.2%
BBB 17.6%
BB 2.8%
B 0.4%
CC 0.2%
Not Rated 3.2%
Money Market Funds 1.9%

Industries

Healthcare Revenue - Hospitals 10.3%
Utilities - Other 10.0%
Airport Revenue 8.7%
Universities - Colleges 7.6%
Multi-Family Housing Revenue 7.3%
Healthcare Revenue - Long Term Care 6.9%
General Obligations - Schools 6.6%
State & Local Agencies 5.2%
General Obligations - General Purpose 3.7%
Student Loan Revenue 3.6%
Other Industries 28.2%

Ratings are assigned using Moody’s, Fitch, and Standard & Poor’s and applying a hierarchy: If all 3 agencies rate a security, the middle rating is assigned; if 2 agencies rate a security, the lower rating is assigned. If none of the 3 agencies rate a security, we use DBRS Morningstar. If none of the 4 agencies rate a security, we use Kroll Bond Rating Agency. Ratings are shown in the S&P and Fitch scale (e.g., AAA). All ratings are subject to change.

For purposes of these classifications, MFS uses its own internal sector/industry classification methodology, which may deviate from classification methodologies used by other industry participants (e.g., the Global Industry Classification Standard).

ADDITIONAL INFORMATION

You can find the fund’s summary prospectus, prospectus, most recent annual and semiannual reports, financial information, portfolio holdings, and statement of additional information online at etfs.mfs.com. Proxy voting information is available without charge by calling 1‑800‑637‑5637, by visiting mfs.com/proxyvoting, or by visiting the SEC’s website at http://www.sec.gov.

IMPORTANT NOTICE REGARDING DELIVERY OF SHAREHOLDER MATERIALS

The fund produces financial annual and semiannual reports and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund's annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund's records. However, any shareholder may contact the fund at 1-800-637-5637 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

EMU-SEM

MFSLOGO_RED.EPS

MFS® Active International ETF

Principal Listing Exchange: NYSE

TSR_Ribbon_red

MFSI

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Active International ETF for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at etfs.mfs.com. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to [email protected].

FUND EXPENSES

What were the fund costs for the last six months?

(based on a hypothetical $10,000 investment)
Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
MFS Active International ETF $30 0.59%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,222,297,101 Portfolio Turnover Rate (%): 5
Total Number of Holdings: 94

Where the fund holds derivatives, they are not included in the total number of portfolio holdings.

PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 8/31/26)

Portfolio structure

Equities 98.7%
Money Market Funds 1.3%

Top ten holdings

Taiwan Semiconductor Manufacturing Co. Ltd., ADR 7.3%
Samsung Electronics Co. Ltd. 3.5%
Tencent Holdings Ltd., ADR 2.3%
Schneider Electric SE 2.1%
Hitachi Ltd. 2.0%
Compagnie Financiere Richemont S.A. 2.0%
Rolls-Royce Holdings PLC 2.0%
Novartis AG 1.9%
Roche Holding AG 1.9%
ING Groep N.V. 1.9%

Issuer country weightings

Japan 14.8%
United Kingdom 12.0%
France 11.4%
Switzerland 9.6%
Taiwan 8.4%
China 7.0%
Germany 5.1%
Canada 4.9%
South Korea 3.5%
Other Countries 23.3%

ADDITIONAL INFORMATION

You can find the fund’s summary prospectus, prospectus, most recent annual and semiannual reports, financial information, portfolio holdings, and statement of additional information online at etfs.mfs.com. Proxy voting information is available without charge by calling 1‑800‑637‑5637, by visiting mfs.com/proxyvoting, or by visiting the SEC’s website at http://www.sec.gov.

IMPORTANT NOTICE REGARDING DELIVERY OF SHAREHOLDER MATERIALS

The fund produces financial annual and semiannual reports and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund's annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund's records. However, any shareholder may contact the fund at 1-800-637-5637 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

EIE-SEM

MFSLOGO_RED.EPS

MFS® Active Value ETF

Principal Listing Exchange: NYSE

TSR_Ribbon_red

MFSV

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Active Value ETF for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at etfs.mfs.com. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to [email protected].

FUND EXPENSES

What were the fund costs for the last six months?

(based on a hypothetical $10,000 investment)
Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
MFS Active Value ETF $23 0.44%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 601,124,791 Portfolio Turnover Rate (%): 24
Total Number of Holdings: 62

Where the fund holds derivatives, they are not included in the total number of portfolio holdings.

PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 8/31/26)

Portfolio structure

Equities 99.1%
Money Market Funds 0.9%

Equity sectors

Financials 23.2%
Information Technology 14.7%
Health Care 14.4%
Industrials 14.3%
Consumer Discretionary 9.3%
Utilities 8.4%
Energy 7.0%
Consumer Staples 4.6%
Real Estate 1.6%
Communication Services 0.8%
Materials 0.8%

Top ten holdings

Amazon.com, Inc. 5.4%
Microsoft Corp. 5.4%
JPMorgan Chase & Co. 4.5%
Apple, Inc. 2.9%
ExxonMobil Holdings Corp. 2.8%
Cigna Group 2.6%
RTX Corp. 2.3%
Bank of America Corp. 2.3%
Morgan Stanley 2.2%
Chevron Corp. 2.1%

MFS uses the Global Industry Classification Standard (GICS®) for sector/industry reporting. MFS has applied its own internal sector/industry classification methodology for equity securities and non-equity securities that are unclassified by GICS.

ADDITIONAL INFORMATION

You can find the fund’s summary prospectus, prospectus, most recent annual and semiannual reports, financial information, portfolio holdings, and statement of additional information online at etfs.mfs.com. Proxy voting information is available without charge by calling 1‑800‑637‑5637, by visiting mfs.com/proxyvoting, or by visiting the SEC’s website at http://www.sec.gov.

IMPORTANT NOTICE REGARDING DELIVERY OF SHAREHOLDER MATERIALS

The fund produces financial annual and semiannual reports and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund's annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund's records. However, any shareholder may contact the fund at 1-800-637-5637 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

EVE-SEM

MFSLOGO_RED.EPS

MFS® Blended Research® International Equity ETF

Principal Listing Exchange: NYSE

TSR_Ribbon_red

BRIE

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Blended Research International Equity ETF for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at etfs.mfs.com. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to [email protected].

FUND EXPENSES

What were the fund costs for the last six months?

(based on a hypothetical $10,000 investment)
Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
MFS Blended Research International Equity ETF $18 0.34%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 489,962,608 Portfolio Turnover Rate (%): 18
Total Number of Holdings: 160

Where the fund holds derivatives, they are not included in the total number of portfolio holdings.

PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 8/31/26)

Portfolio structure

Equities 98.0%
Money Market Funds 2.0%

Equity sectors

Financials 24.2%
Information Technology 20.4%
Industrials 13.9%
Consumer Discretionary 6.9%
Health Care 6.8%
Materials 6.3%
Consumer Staples 5.6%
Communication Services 4.8%
Energy 4.8%
Utilities 2.8%
Real Estate 1.5%

Top ten holdings

Taiwan Semiconductor Manufacturing Co. Ltd., ADR 5.1%
ASML Holding N.V. 2.6%
Samsung Electronics Co. Ltd. 2.5%
SK hynix, Inc. 2.1%
Rio Tinto PLC 1.9%
BNP Paribas S.A. 1.7%
Novartis AG 1.7%
ING Groep N.V. 1.7%
Toronto-Dominion Bank 1.6%
UBS Group AG 1.6%

MFS uses the Global Industry Classification Standard (GICS®) for sector/industry reporting. MFS has applied its own internal sector/industry classification methodology for equity securities and non-equity securities that are unclassified by GICS.

ADDITIONAL INFORMATION

You can find the fund’s summary prospectus, prospectus, most recent annual and semiannual reports, financial information, portfolio holdings, and statement of additional information online at etfs.mfs.com. Proxy voting information is available without charge by calling 1‑800‑637‑5637, by visiting mfs.com/proxyvoting, or by visiting the SEC’s website at http://www.sec.gov.

IMPORTANT NOTICE REGARDING DELIVERY OF SHAREHOLDER MATERIALS

The fund produces financial annual and semiannual reports and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund's annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund's records. However, any shareholder may contact the fund at 1-800-637-5637 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

EBI-SEM

MFSLOGO_RED.EPS

MFS® Blended Research® Core Equity ETF

Principal Listing Exchange: NYSE

TSR_Ribbon_red

BRCE

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Blended Research Core Equity ETF for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at etfs.mfs.com. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to [email protected].

FUND EXPENSES

What were the fund costs for the last six months?

(based on a hypothetical $10,000 investment)
Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
MFS Blended Research Core Equity ETF $13 0.24%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 37,024,147 Portfolio Turnover Rate (%): 19
Total Number of Holdings: 105

PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 8/31/26)

Portfolio structure

Equities 99.7%
Money Market Funds 0.3%

Equity sectors

Information Technology 38.4%
Financials 12.8%
Health Care 10.2%
Communication Services 8.7%
Industrials 8.1%
Consumer Discretionary 8.0%
Consumer Staples 5.1%
Energy 3.8%
Utilities 2.1%
Materials 1.4%
Real Estate 1.1%

Top ten holdings

NVIDIA Corp. 9.3%
Apple, Inc. 7.0%
Microsoft Corp. 5.0%
Amazon.com, Inc. 4.1%
Alphabet, Inc., "A" 2.7%
Broadcom, Inc. 2.4%
Johnson & Johnson 2.3%
Salesforce, Inc. 2.2%
Micron Technology, Inc. 2.2%
Mastercard, Inc., "A" 2.1%

MFS uses the Global Industry Classification Standard (GICS®) for sector/industry reporting. MFS has applied its own internal sector/industry classification methodology for equity securities and non-equity securities that are unclassified by GICS.

ADDITIONAL INFORMATION

You can find the fund’s summary prospectus, prospectus, most recent annual and semiannual reports, financial information, portfolio holdings, and statement of additional information online at etfs.mfs.com. Proxy voting information is available without charge by calling 1‑800‑637‑5637, by visiting mfs.com/proxyvoting, or by visiting the SEC’s website at http://www.sec.gov.

IMPORTANT NOTICE REGARDING DELIVERY OF SHAREHOLDER MATERIALS

The fund produces financial annual and semiannual reports and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund's annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund's records. However, any shareholder may contact the fund at 1-800-637-5637 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

EBC-SEM

MFSLOGO_RED.EPS

MFS® Active Mid Cap ETF

Principal Listing Exchange: NYSE

TSR_Ribbon_red

MMID

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Active Mid Cap ETF for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at etfs.mfs.com. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to [email protected].

FUND EXPENSES

What were the fund costs for the last six months?

(based on a hypothetical $10,000 investment)
Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
MFS Active Mid Cap ETF $30 0.59%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 36,220,653 Portfolio Turnover Rate (%): 9
Total Number of Holdings: 107

Where the fund holds derivatives, they are not included in the total number of portfolio holdings.

PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 8/31/26)

Portfolio structure

Equities 96.8%
Money Market Funds 3.2%

Equity sectors

Industrials 17.7%
Financials 15.2%
Information Technology 12.1%
Health Care 11.5%
Consumer Discretionary 9.3%
Real Estate 7.2%
Energy 6.9%
Materials 6.4%
Utilities 5.8%
Consumer Staples 3.5%
Communication Services 1.2%

Top ten holdings

Global Payments, Inc. 1.9%
Cheniere Energy, Inc. 1.7%
Waters Corp. 1.7%
Becton, Dickinson and Co. 1.6%
Diamondback Energy, Inc. 1.6%
Agilent Technologies, Inc. 1.5%
Wabtec Corp. 1.5%
W.W. Grainger, Inc. 1.4%
Valero Energy Corp. 1.4%
STERIS PLC 1.4%

MFS uses the Global Industry Classification Standard (GICS®) for sector/industry reporting. MFS has applied its own internal sector/industry classification methodology for equity securities and non-equity securities that are unclassified by GICS.

ADDITIONAL INFORMATION

You can find the fund’s summary prospectus, prospectus, most recent annual and semiannual reports, financial information, portfolio holdings, and statement of additional information online at etfs.mfs.com. Proxy voting information is available without charge by calling 1‑800‑637‑5637, by visiting mfs.com/proxyvoting, or by visiting the SEC’s website at http://www.sec.gov.

IMPORTANT NOTICE REGARDING DELIVERY OF SHAREHOLDER MATERIALS

The fund produces financial annual and semiannual reports and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund's annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund's records. However, any shareholder may contact the fund at 1-800-637-5637 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

ECM-SEM

MFSLOGO_RED.EPS

MFS® Active International Value ETF

Principal Listing Exchange: NYSE Arca

TSR_Ribbon_red

MIVL

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Active International Value ETF for the period of June 4, 2026 to August 31, 2026. You can find additional information about the fund at etfs.mfs.com. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to [email protected].

FUND EXPENSES

What were the fund costs for the last six months#?

(based on a hypothetical $10,000 investment)
Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
MFS Active International Value ETF $14 0.57%

# For the period from the commencement of the fund’s investment operations, June 4, 2026 through August 31, 2026. Expenses for a full 6 month semiannual period would have been higher.

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 25,072,812 Portfolio Turnover Rate (%): 2
Total Number of Holdings: 63

Where the fund holds derivatives, they are not included in the total number of portfolio holdings.

PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 8/31/26)

Portfolio structure

Equities 99.4%
Money Market Funds 0.6%

Top ten holdings

NatWest Group PLC 4.3%
BNP Paribas S.A. 4.2%
UBS Group AG 3.5%
TotalEnergies SE 3.3%
Eni S.p.A. 2.6%
Glencore PLC 2.5%
British American Tobacco PLC 2.5%
Rio Tinto PLC 2.4%
Barclays PLC 2.4%
Henkel AG & Co. KGaA 2.2%

Issuer country weightings

United Kingdom 29.6%
France 17.9%
Japan 13.6%
Italy 5.5%
Ireland 5.5%
Netherlands 5.2%
Switzerland 5.1%
Germany 5.0%
Canada 4.3%
Other Countries 8.3%

ADDITIONAL INFORMATION

You can find the fund’s summary prospectus, prospectus, most recent annual and semiannual reports, financial information, portfolio holdings, and statement of additional information online at etfs.mfs.com. Proxy voting information is available without charge by calling 1‑800‑637‑5637, by visiting mfs.com/proxyvoting, or by visiting the SEC’s website at http://www.sec.gov.

IMPORTANT NOTICE REGARDING DELIVERY OF SHAREHOLDER MATERIALS

The fund produces financial annual and semiannual reports and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund's annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund's records. However, any shareholder may contact the fund at 1-800-637-5637 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

EIL-SEM

MFSLOGO_RED.EPS

MFS® Blended Research® Small-Mid Cap ETF

Principal Listing Exchange: NYSE Arca

TSR_Ribbon_red

BRSM

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Blended Research Small-Mid Cap ETF for the period of June 4, 2026 to August 31, 2026. You can find additional information about the fund at etfs.mfs.com. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to [email protected].

FUND EXPENSES

What were the fund costs for the last six months#?

(based on a hypothetical $10,000 investment)
Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
MFS Blended Research Small-Mid Cap ETF $9 0.38%

# For the period from the commencement of the fund’s investment operations, June 4, 2026 through August 31, 2026. Expenses for a full 6 month semiannual period would have been higher.

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 27,525,416 Portfolio Turnover Rate (%): 13
Total Number of Holdings: 312

Where the fund holds derivatives, they are not included in the total number of portfolio holdings.

PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 8/31/26)

Portfolio structure

Equities 99.8%
Money Market Funds 0.2%

Equity sectors

Industrials 17.5%
Financials 17.1%
Information Technology 14.7%
Health Care 13.9%
Consumer Discretionary 10.0%
Real Estate 7.6%
Materials 5.3%
Energy 4.2%
Utilities 3.4%
Communication Services 3.3%
Consumer Staples 2.8%

Top ten holdings

TechnipFMC PLC 1.1%
Roku, Inc. 1.1%
Box, Inc., "A" 1.1%
Aramark 1.0%
Universal Health Services, Inc. 1.0%
Everest Group Ltd. 1.0%
BILL Holdings, Inc. 1.0%
Popular, Inc. 1.0%
Lincoln National Corp. 1.0%
UGI Corp. 0.9%

MFS uses the Global Industry Classification Standard (GICS®) for sector/industry reporting. MFS has applied its own internal sector/industry classification methodology for equity securities and non-equity securities that are unclassified by GICS.

ADDITIONAL INFORMATION

You can find the fund’s summary prospectus, prospectus, most recent annual and semiannual reports, financial information, portfolio holdings, and statement of additional information online at etfs.mfs.com. Proxy voting information is available without charge by calling 1‑800‑637‑5637, by visiting mfs.com/proxyvoting, or by visiting the SEC’s website at http://www.sec.gov.

IMPORTANT NOTICE REGARDING DELIVERY OF SHAREHOLDER MATERIALS

The fund produces financial annual and semiannual reports and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund's annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund's records. However, any shareholder may contact the fund at 1-800-637-5637 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

ESM-SEM

MFSLOGO_RED.EPS

MFS® Blended Research® Emerging Markets Equity ETF

Principal Listing Exchange: NYSE

TSR_Ribbon_red

BREE

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Blended Research Emerging Markets Equity ETF for the period of March 5, 2026 to August 31, 2026. You can find additional information about the fund at etfs.mfs.com. You can also request this information by contacting us at 1‑800‑225‑2606 or by sending an e-mail request to [email protected].

FUND EXPENSES

What were the fund costs for the last six months#?

(based on a hypothetical $10,000 investment)
Fund Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
MFS Blended Research Emerging Markets Equity ETF $24 0.44%

# For the period from the commencement of the fund’s investment operations, March 5, 2026 through August 31, 2026. Expenses for a full 6 month semiannual period would have been higher.

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 26,579,681 Portfolio Turnover Rate (%): 14
Total Number of Holdings: 137

Where the fund holds derivatives, they are not included in the total number of portfolio holdings.

PORTFOLIO COMPOSITION (BASED ON TOTAL INVESTMENTS AS OF 8/31/26)

Portfolio structure

Equities 99.0%
Money Market Funds 1.0%

Equity sectors

Information Technology 41.8%
Financials 19.3%
Consumer Discretionary 7.7%
Communication Services 6.8%
Industrials 6.4%
Materials 5.7%
Energy 3.7%
Consumer Staples 3.1%
Health Care 2.7%
Utilities 1.4%
Real Estate 0.4%

Top ten holdings

Taiwan Semiconductor Manufacturing Co. Ltd., ADR 13.6%
SK hynix, Inc. 5.9%
Samsung Electronics Co. Ltd. 5.7%
Tencent Holdings Ltd., ADR 2.9%
Samsung Electronics Co. Ltd. 2.7%
China Construction Bank Corp. 2.2%
Hon Hai Precision Industry Co. Ltd. 1.9%
Alibaba Group Holding Ltd., ADR 1.7%
King Slide Works Co. Ltd. 1.7%
MediaTek, Inc. 1.6%

MFS uses the Global Industry Classification Standard (GICS®) for sector/industry reporting. MFS has applied its own internal sector/industry classification methodology for equity securities and non-equity securities that are unclassified by GICS.

ADDITIONAL INFORMATION

You can find the fund’s summary prospectus, prospectus, most recent annual and semiannual reports, financial information, portfolio holdings, and statement of additional information online at etfs.mfs.com. Proxy voting information is available without charge by calling 1‑800‑637‑5637, by visiting mfs.com/proxyvoting, or by visiting the SEC’s website at http://www.sec.gov.

IMPORTANT NOTICE REGARDING DELIVERY OF SHAREHOLDER MATERIALS

The fund produces financial annual and semiannual reports and updates its summary prospectus and prospectus annually. To avoid sending duplicate copies of materials to households, only one copy of the fund's annual and semiannual report and summary prospectus may be mailed to shareholders having the same last name and residential address on the fund's records. However, any shareholder may contact the fund at 1-800-637-5637 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

EBE-SEM

Item 1(b):

Not applicable.

ITEM 2.  CODE OF ETHICS.

During the period covered by this report, the Registrant has not amended any provision in its Code of Ethics (the “Code”) that relates to an element of the Code’s definition enumerated in paragraph (b) of Item 2 of this Form N-CSR. During the period covered by this report, the Registrant did not grant a waiver, including an implicit waiver, from any provision of the Code.

ITEM 3.  AUDIT COMMITTEE FINANCIAL EXPERT.

Not applicable for semi-annual reports.

ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES.

Not applicable for semi-annual reports.

ITEM 5.  AUDIT COMMITTEE OF LISTED REGISTRANTS.

Not applicable for semi-annual reports.

ITEM 6.  INVESTMENTS

A schedule of investments for each series covered by this Form N-CSR is included in the financial statements of such series under Item 7 of this Form N-CSR.

MFS Active Core Plus Bond ETF

ITEM 7.  FINANCIAL STATEMENTS AND FINANCIAL HIGHLIGHTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

MFS Active Core Plus Bond ETF

Portfolio of Investments − 8/31/26 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

Issuer

Shares/Par

Value ($)

Bonds – 98.6%

Aerospace & Defense – 1.2%

Boeing Co., 6.528%, 5/01/2034 

$

2,577,000

$2,749,458

Boeing Co., 5.805%, 5/01/2050 

159,000

149,881

Bombardier, Inc., 6.75%, 6/15/2033 (n)

1,785,000

1,843,050

TransDigm, Inc., 4.625%, 1/15/2029 

330,000

324,028

TransDigm, Inc., 6.375%, 5/31/2033 (n)

1,781,000

1,785,841

$6,852,258

Asset-Backed & Securitized – 24.8%

ACORE Issuer LLC, 2026-FL1, “B”, 5.552%, 8/20/2043 (n)

$

1,750,000

$1,751,791

ACORE Issuer LLC, 2026-FL1, “C”, FLR, 5.752% (SOFR - 1mo. + 2.1%), 8/20/2043 (n)

692,000

693,571

ACREC LLC, 2025-FL3, “AS”, FLR, 5.278% (SOFR - 1mo. + 1.64%), 8/18/2042 (n)

97,500

97,500

ACREC LLC, 2026-FL5, “B”, FLR, 5.397% (SOFR - 1mo. + 1.75%), 7/18/2043 (n)

767,875

768,389

Acres PLC, 2026-FL4, “AS”, FLR, 5.338% (SOFR - 1mo. + 1.7%), 8/18/2044 (n)

551,500

551,499

Affirm Master Trust, 2025-2A, “A”, 4.67%, 7/15/2033 (n)

100,000

100,065

American Credit Acceptance Receivables Trust, 2025-4, “A”, 4.42%, 5/14/2029 (n)

217,639

217,770

AmeriCredit Automobile Receivables Trust, 2025-1, “A2A”, 4.22%, 3/19/2029 (n)

79,242

79,214

AmeriCredit Automobile Receivables Trust, 2026-1, “A”, 4.16%, 7/12/2029 (n)

418,140

417,776

Angel Oak Mortgage Trust, 2024-9, “A1”, 5.138%, 9/25/2069 (n)

147,447

146,393

Angel Oak Mortgage Trust, 2025-10, “A1”, 4.96%, 9/25/2070 (n)

152,325

150,186

Arbor Realty Commercial Real Estate, 2026-FL1, “B”, FLR, 5.652% (SOFR - 1mo. + 2%), 9/20/2043 (n)

1,500,000

1,502,809

Arbor Realty Commercial Real Estate, 2026-FL1, “C”, FLR, 5.852% (SOFR - 1mo. + 2.2%), 9/20/2043 (n)

2,009,424

2,015,535

Arbor Realty Trust, Inc., CLO, 2022-FL1, “A”, FLR, 5.086% (SOFR - 1mo. + 1.45%), 1/15/2037 (n)

76,658

76,659

Arbor Realty Trust, Inc., CLO, 2022-FL1, “C”, FLR, 5.936% (SOFR - 30 day + 2.3%), 1/15/2037 (n)

327,000

326,998

ARDN Mortgage Trust, 2025-ARCP, “C”, FLR, 5.989% (SOFR - 1mo. + 2.35%), 6/15/2035 (n)

100,000

100,188

AREIT 2025-CRE10 Ltd., “AS”, FLR, 5.181% (SOFR - 1mo. + 1.5421%), 1/17/2030 (n)

120,332

120,031

AREIT 2026-CRE12 Ltd., “B”, FLR, 5.45% (SOFR - 1mo. + 1.8%), 2/18/2044 (n)

1,346,981

1,347,832

Ares CLO Ltd., FLR, 5.51% (SOFR - 3mo. + 1.7%), 1/25/2038 (n)

1,500,000

1,500,748

ARI Fleet Lease Trust, 2026-A, “A2”, 3.96%, 11/15/2034 (n)

141,000

140,208

Aspire Mortgage Trust, 2026-1, “A1”, 4.855%, 1/25/2066 (n)

354,860

349,506

Aspire Mortgage Trust, 2026-2, “A1”, 5.325%, 4/26/2066 (n)

761,680

754,791

Babson CLO Ltd., 2021-3A, “B1R”, FLR, 5.359% (SOFR - 3mo. + 1.63%), 1/18/2035 (n)

350,000

350,512

Bain Capital Credit CLO Ltd., 2019-1A, “CR3”, FLR, 5.329% (SOFR - 3mo. + 1.6%), 4/19/2034 (n)

2,500,000

2,501,865

Bain Capital Credit CLO Ltd., 2020-3A, “DRR”, FLR, 6.852% (SOFR - 3mo. + 3.1%), 10/23/2034 (n)

935,000

916,262

Bain Capital Credit CLO Ltd., 2020-4A, “BRR”, FLR, 5.329% (SOFR - 3mo. + 1.6%), 10/20/2036 (n)

803,892

804,616

Bain Capital Credit CLO Ltd., 2021-4A, “CRR”, FLR, 5.279% (SOFR - 3mo. + 1.55%), 10/20/2034 (n)

1,300,000

1,298,825

Bain Capital Credit CLO Ltd., 2022-1A, “CR”, FLR, 5.579% (SOFR - 3mo. + 1.85%), 10/18/2038 (n)

800,000

800,367

Bain Capital Credit CLO Ltd., 2022-3A, “CR”, FLR, 5.649% (SOFR - 3mo. + 1.9%), 7/17/2035 (n)

500,000

500,373

Balboa Bay Loan Funding Ltd., 2024-1A, “D1R”, FLR, 6.329% (SOFR - 3mo. + 2.6%), 7/20/2037 (n)

1,400,000

1,399,097

Bank5, 2026-5YR20, “AS”, 5.336%, 2/15/2059 

232,069

230,123

Bardot CLO Ltd., 2019-2A, “BRR”, FLR, 5.083% (SOFR - 3mo. + 1.35%), 10/22/2032 (n)

250,000

249,990

Bardot CLO Ltd., 2019-2A, “CRR”, FLR, 5.283% (SOFR - 3mo. + 1.55%), 10/22/2032 (n)

250,000

250,078

BBCMS Mortgage Trust, 2025-C39, “A5”, 5.296%, 12/15/2058 

157,895

156,726

BDS Ltd., 2025-FL14, “B”, FLR, 5.339% (SOFR - 1mo. + 1.6926%), 10/17/2042 (n)

134,096

134,104

BDS Ltd., 2025-FL16, “B”, FLR, 5.497% (SOFR - 1mo. + 1.85%), 6/19/2043 (n)

496,505

494,700

BDS Ltd., 2026-FL17, “AS”, FLR, 5.197% (SOFR - 1mo. + 1.55%), 5/19/2043 (n)

1,000,000

1,000,279

BDS Ltd., 2026-FL17, “C”, FLR, 5.597% (SOFR - 1mo. + 1.95%), 5/19/2043 (n)

636,902

636,898

BDS Ltd., 2026-FL18, “B”, FLR, 5.347% (SOFR - 1mo. + 1.7%), 2/19/2044 (n)

1,580,208

1,580,810

Benchmark 2025-V18 Mortgage Trust, “AS”, 5.592%, 10/15/2058 

133,186

133,271

Black Diamond CLO Ltd., 2021-1A, “BR”, FLR, 5.933% (SOFR - 3mo. + 2.2%), 11/22/2034 (n)

400,000

399,605

ECPFS-SEM

1


MFS Active Core Plus Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Asset-Backed & Securitized – continued

BlueMountain CLO Ltd., 2019-26AR, “CR2”, FLR, 5.579% (SOFR - 3mo. + 1.85%), 10/20/2034 (n)

$

1,042,023

$1,042,870

BMO Mortgage Trust, 2026-C15, “A5”, 5.818%, 8/15/2059 

1,951,336

1,999,351

BMP Commercial Mortgage Trust, 2024-MF23, “B”, 5.28% (SOFR - 1mo. + 1.6416%), 6/15/2041 (n)

250,000

250,000

BofA Auto Trust, 2026-A, “A2A”, 4.1%, 11/15/2028 (n)

438,000

437,591

BRSP 2026-FL3 Ltd., “AS”, FLR, 5.347%, 8/19/2043 (n)

667,000

667,834

BRSP 2026-FL3 Ltd., “C”, FLR, 5.747% (SOFR - 1mo. + 2.1%), 8/19/2043 (n)

484,000

484,548

BSPRT Issuer Ltd., 2024-FL11, “AS”, 5.734% (SOFR - 1mo. + 2.095%), 7/15/2039 (n)

150,000

150,188

BSPRT Issuer Ltd., 2026-FL13, “B”, FLR, 5.638% (SOFR - 1mo. + 2%), 10/18/2043 (n)

2,000,000

2,002,280

Business Jet Securities LLC, 2026-1A, “C”, 8.179%, 6/15/2041 (n)

262,024

262,065

BX Trust, 2025-BCAT, “A”, FLR, 5.019% (SOFR - 1mo. + 1.38%), 8/15/2042 (n)

245,477

245,937

BX Trust, 2025-BCAT, “C”, FLR, 5.539% (SOFR - 1mo. + 1.9%), 8/15/2042 (n)

70,000

70,241

BX Trust, 2025-BCAT, “D”, FLR, 6.289% (SOFR - 1mo. + 2.65%), 8/15/2042 (n)

700,000

703,719

BX Trust, 2026-CLS, “C”, FLR, 5.989% (SOFR - 1mo. + 2.35%), 5/15/2043 (n)

168,000

168,624

BX Trust, 2026-CLS, “D”, FLR, 7.089% (SOFR - 1mo. + 3.45%), 5/15/2043 (n)

176,000

177,091

BX Trust, 2026-CSMO, “A”, FLR, 5.039% (SOFR - 1mo. + 1.4%), 2/15/2043 (n)

2,380,000

2,385,950

BX Trust, 2026-LBTY, “B”, FLR, 5.1% (SOFR - 1mo. + 1.45%), 8/15/2048 (n)

333,965

333,963

BX Trust, 2026-LBTY, “C”, FLR, 5.25% (SOFR - 1mo. + 1.6%), 8/15/2048 (n)

200,099

200,098

BX Trust, 2026-LP3, “D”, FLR, 5.989% (SOFR - 1mo. + 2.35%), 4/15/2043 (n)

1,981,221

1,994,842

BX Trust, 2026-ORBT, “D”, FLR, 5.739% (SOFR - 1mo. + 2.1%), 7/15/2043 (n)

563,726

565,135

BXMT 2021-FL4 Ltd., “A”, FLR, 5.053% ((SOFR - 1mo. + 0.11448%) + 1.05%), 5/15/2038 (n)

167,660

167,609

CarMax Select Receivables Trust, 2025-B, “A2”, 4.19%, 3/15/2029 

136,067

135,994

CarMax Select Receivables Trust, 2026-B, “A2”, 4.35%, 4/16/2029 

366,000

365,867

CarMax Select Recievables Trust, 2026-B, “B”, 4.88%, 10/15/2032 

273,000

272,652

Cathedral Lake VI Ltd., FLR, 5.66% (SOFR - 3mo. + 1.85%), 4/25/2034 (n)

287,716

287,806

Chesapeake IV Funding, 2026-1A, “A2”, 4.26%, 12/15/2028 (n)

493,000

492,232

CIFC Funding 2024-1AR Ltd., “DR”, FLR, 6.279% (SOFR - 3mo. + 2.55%), 4/18/2037 (n)

3,000,000

2,996,346

CIP Commercial Mortgage Trust, 2025-SBAY, “A”, FLR, 5.039% (SOFR - 1mo. + 1.4%), 10/15/2037 (n)

166,039

166,454

Colt Funding LLC, 2024-3, “A1”, 6.393%, 6/25/2069 (n)

119,616

120,036

Colt Funding LLC, 2024-6, “A1”, 5.39%, 11/25/2069 (n)

157,615

157,042

Colt Funding LLC, 2025-1, “A1”, 5.699%, 1/25/2070 (n)

67,616

67,629

Columbia Cent CLO Ltd., 2020-30A, “CR2”, FLR, 5.629% (SOFR - 3mo. + 1.9%), 1/20/2034 (n)

387,755

383,473

Columbia Cent CLO Ltd., 2021-31A, “CR”, FLR, 5.579% (SOFR - 3mo. + 1.85%), 4/20/2034 (n)

300,000

297,673

Commercial Mortgage Pass-Through Certificates, 2023-BNK46, “A4”, 5.745%, 8/15/2056 

250,000

255,458

Commercial Mortgage Pass-Through Certificates, 2023-BNK46, “AS”, 6.385%, 8/15/2056 

500,000

514,841

Commercial Mortgage Pass-Through Certificates, 2024-CBM, “B”, 6.511%, 12/10/2041 (n)

200,000

201,795

Commercial Mortgage Pass-Through Certificates, 2025-5YR17, “AS”, 5.626%, 11/15/2058 

188,139

188,631

Commercial Mortgage Pass-Through Certificates, 2026-5YR20, “A3”, 5.104%, 2/15/2059 

75,609

75,336

Commercial Mortgage Pass-Through Certificates, 2026-BNK52, “A5”, 5.586%, 5/15/2069 

447,406

452,922

CPS Auto Receivables Trust, 2026-B, “A”, 4.35%, 2/15/2030 (n)

492,820

492,504

Dell Equipment Finance Trust, 2026-1A, “A2”, 4.24%, 7/24/2028 (n)

570,000

569,071

Dryden Senior Loan Fund CLO Ltd., 2016-43A, “CR3”, FLR, 5.479% (SOFR - 3mo. + 1.75%), 4/20/2034 (n)

250,000

250,455

Dryden Senior Loan Fund CLO Ltd., 2020-83A, “CR2”, FLR, 5.579% (SOFR - 3mo. + 1.85%), 4/18/2037 (n)

1,750,000

1,751,914

Dryden Senior Loan Fund CLO Ltd., 2020-86A, “CR2”, FLR, 5.649% (SOFR - 3mo. + 1.9%), 7/17/2034 (n)

999,128

1,001,207

Dryden Senior Loan Fund CLO Ltd., 2022-98A, “CR”, FLR, 5.629% (SOFR - 3mo. + 1.9%), 4/20/2035 (n)

1,500,000

1,502,257

Dwight 2025-FL1, “A”, FLR, 5.3% (SOFR - 1mo. + 1.662%), 6/18/2042 (n)

206,500

207,193

Dwight 2026-FL2, “B”, FLR, 5.638% (SOFR - 1mo. + 2%), 1/18/2044 (n)

1,968,000

1,969,307

ELM Trust, 2024-ELM, “C15”, 6.396%, 6/10/2039 (n)

1,100,000

1,099,484

ELM Trust, 2024-ELM, “D10”, 6.847%, 6/10/2039 (n)

221,000

221,049

Elmwood CLO Ltd., 2021-1A, “CRR”, FLR, 5.529% (SOFR - 3mo. + 1.8%), 4/20/2037 (n)

2,500,000

2,500,895

Elmwood CLO Ltd., 2022-2A, “CR”, FLR, 5.583% (SOFR - 3mo. + 1.85%), 4/22/2035 (n)

500,000

500,000

Enterprise Fleet Financing 2025-4 LLC, “A2”, 4.05%, 8/20/2028 (n)

163,202

162,836

Enterprise Fleet Financing 2026-1 LLC, “A2”, 4%, 10/20/2028 (n)

568,000

565,250

General Motors Co., FLR, 4.186% (SOFR - 1mo. + 0.55%), 11/15/2029 (n)

250,000

250,433

GLS Auto Select Receivables Trust, 2026-2A, “A2”, 4.04%, 11/15/2028 (n)

315,667

315,394

2


MFS Active Core Plus Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Asset-Backed & Securitized – continued

GLS Auto Select Receivables Trust, 2026-2A, “A2”, 4.46%, 6/15/2032 (n)

$

907,000

$904,537

GLS Auto Select Receivables Trust, 2026-3A, “A2”, 4.47%, 3/15/2029 (n)

374,000

373,885

GoldenTree Loan Management CLO Ltd., 2023-17A, “CR”, FLR, 5.529% (SOFR - 3mo. + 1.8%), 1/20/2039 (n)

600,000

600,693

Greystone Commercial Real Estate Notes, 2025-FL4, “B”, FLR, 6.227% (SOFR - 1mo. + 2.5887%), 1/15/2043 (n)

100,000

101,134

Harbor Park CLO Ltd., 2018-1A, “DR2”, FLR, 6.229% (SOFR - 3mo. + 2.5%), 1/20/2031 (n)

486,979

474,694

HPS Loan Management Ltd., FLR, 5.552% (SOFR - 3mo. + 1.8%), 4/15/2037 (n)

2,000,000

2,005,906

Hyundai Auto Lease Securitization Trust, 2025-B, “A2A”, 4.58%, 9/15/2027 (n)

41,213

41,244

ILPT Commercial Mortgage Trust, 2025-LPF2, “A”, 5.468%, 7/13/2042 (n)

109,000

108,686

Jersey Mikes Funding LLC, 2026-1A, “A2I”, 4.952%, 2/15/2056 (n)

329,266

320,651

JPMorgan Mortgage Trust, 2026-NQM1, “A1”, 4.745%, 6/25/2066 (n)

152,745

149,648

JPMorgan Mortgage Trust, 2026-NQM5, “A1”, 5.677%, 1/25/2067 (n)

1,167,523

1,165,357

LoanCore 2025-CRE8 Ltd., “B”, FLR, 5.48% (SOFR - 1mo. + 1.8412%), 8/17/2042 (n)

147,000

146,557

LoanCore 2025-CRE8 Ltd., “C”, FLR, 5.78% (SOFR - 1mo. + 2.14145%), 8/17/2042 (n)

2,187,500

2,179,371

LoanCore 2025-CRE9 Ltd., “AS”, FLR, 5.338% (SOFR - 1mo. + 1.7%), 8/18/2042 (n)

2,489,000

2,493,388

LRECS 2025-CRE1 LLC, “B”, FLR, 5.669% (SOFR - 1mo. + 2%), 8/19/2043 (n)

687,327

687,927

Marble Point CLO XXII Ltd., 2021-2AR, “CR2”, FLR, 5.516% (SOFR - 3mo. + 1.8%), 7/25/2034 (n)

394,872

394,872

MF1 2025-FL20 LLC, “C”, FLR, 5.788% (SOFR - 1mo. + 2.15%), 2/18/2043 (n)

1,404,267

1,407,758

MF1 2021-FL7 Ltd., “AS”, FLR, 5.203% ((SOFR - 1mo. + 0.11448%) + 1.45%), 10/16/2036 (n)

1,000,000

999,570

MF1 2022-FL8 Ltd., “A”, FLR, 4.997% (SOFR - 1mo. + 1.35%), 2/19/2037 (n)

82,352

82,352

MF1 2022-FL8 Ltd., “C”, FLR, 5.847% (SOFR - 30 day + 2.2%), 2/19/2037 (n)

1,750,000

1,746,729

MF1 2024-FL16 LLC, “C”, FLR, 6.18% (SOFR - 1mo. + 2.542%), 11/18/2039 (n)

350,000

350,000

MF1 2025-FL17 LLC, “A”, FLR, 4.958% (SOFR - 1mo. + 1.32%), 2/18/2040 (n)

500,000

500,067

MF1 2025-FL17 LLC, “B”, FLR, 5.43% (SOFR - 1mo. + 1.792%), 2/18/2040 (n)

500,000

500,245

MF1 2025-FL17 LLC, “C”, FLR, 5.73% (SOFR - 1mo. + 2.092%), 2/18/2040 (n)

888,889

889,322

MF1 2025-FL19 LLC, “A”, FLR, 5.21% (SOFR - 1mo. + 1.572%), 2/18/2040 (n)

250,000

250,065

MF1 2025-FL19 LLC, “AS”, FLR, 5.98% (SOFR - 1mo. + 2.3414%), 5/18/2042 (n)

572,121

572,954

MF1 2025-FL19 LLC, “B”, FLR, 5.63% (SOFR - 1mo. + 1.9917%), 5/18/2042 (n)

715,568

717,086

MF1 2026-FL21 LLC, “AS”, FLR, 5.188% (SOFR - 1mo. + 1.55%), 2/18/2041 (n)

527,037

527,224

MF1 2026-FL21 LLC, “C”, FLR, 5.588% (SOFR - 1mo. + 1.95%), 2/18/2041 (n)

2,446,186

2,446,171

MF1 2026-FL22 LLC, “C”, FLR, 5.638% (SOFR - 1mo. + 2%), 11/18/2043 (n)

1,418,818

1,419,743

Morgan Stanley Residential Mortgage Loan Trust, 2026-NQM1, “A1”, 4.809%, 12/25/2070 (n)

209,208

205,300

Morgan Stanley Residential Mortgage Loan Trust, 2024-NQM1, “A1”, 6.152%, 12/25/2068 (n)

97,560

97,599

Morgan Stanley Residential Mortgage Loan Trust, 2025-NQM6, “A1”, 5.152%, 7/25/2070 (n)

164,579

163,047

Morgan Stanley Residential Mortgage Loan Trust, 2025-NQM9, “A1”, 5.016%, 9/25/2070 (n)

353,011

348,820

Morgan Stanley Residential Mortgage Loan Trust, 2026-NQM2, “A1”, 4.734%, 1/26/2071 (n)

855,021

837,017

Morgan Stanley Residential Mortgage Loan Trust, 2026-NQM3, “A1”, 5.209%, 3/25/2071 (n)

1,188,820

1,178,603

Morgan Stanley Residential Mortgage Loan Trust, 2026-NQM4, “A1”, 5.075%, 3/25/2071 (n)

561,240

553,249

MTN Commercial Mortgage Trust, 2026-LPFX, “C”, 5.757%, 5/15/2043 (n)

222,222

220,198

New Residential Mortgage Loan Trust, 2024-NQM3, “A1”, 5.53%, 5/25/2065 (n)

2,568,986

2,553,892

New Residential Mortgage Loan Trust, 2025-NQM2, “A1”, 5.566%, 4/25/2065 (n)

71,516

71,153

New Residential Mortgage Loan Trust, 2025-NQM4, “A1”, 5.35%, 7/25/2065 (n)

276,080

273,403

New Residential Mortgage Loan Trust, 2025-NQM6, “A1”, 5.085%, 10/25/2065 (n)

1,280,854

1,265,384

New Residential Mortgage Loan Trust, 2026-NQM2, “A1”, 4.743%, 12/25/2065 (n)

592,469

581,070

New Residential Mortgage Loan Trust, 2026-NQM4, “A1”, 5.003%, 2/25/2066 (n)

1,180,768

1,163,253

New Residential Mortgage Loan Trust, 2026-NQM6, “A1”, 5.293%, 5/25/2066 (n)

1,068,821

1,058,344

New Residential Mortgage Loan Trust, 2026-NQM7, “A1”, 5.418%, 6/25/2066 (n)

1,020,778

1,013,042

New Residential Mortgage Loan Trust, 2026-NQM9, “A1”, 4.833%, 2/25/2066 (n)

1,240,220

1,218,282

New Residential Mortgage Loan Trust, 2026-NQM9, “A1”, 5.674%, 8/25/2066 (n)

1,569,825

1,566,763

Oakre Issuer LLC, 2026-FL1B, “B”, 5.55%, 2/18/2044 (n)

2,285,714

2,286,428

OBX Trust, 2024-NQM6, “A1”, 6.447%, 2/25/2064 (n)

117,854

118,253

OBX Trust, 2025-NQM1, “A1”, 5.547%, 12/25/2064 (n)

65,193

65,111

OBX Trust, 2025-NQM11, “A1”, 5.418%, 5/25/2065 (n)

2,183,662

2,173,529

OBX Trust, 2025-NQM13, “A1”, 5.441%, 5/25/2065 (n)

69,451

69,148

OBX Trust, 2025-NQM14, “A1”, 5.162%, 7/25/2065 (n)

70,792

70,269

3


MFS Active Core Plus Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Asset-Backed & Securitized – continued

OBX Trust, 2025-NQM15, “A1B”, 5.143%, 7/27/2065 (n)

$

68,380

$67,782

OBX Trust, 2025-NQM16, “A1”, 4.905%, 8/25/2065 (n)

223,433

220,532

OBX Trust, 2025-NQM20, “A1”, 5.021%, 10/25/2065 (n)

157,882

155,935

OBX Trust, 2026-INV4, “AF2”, FLR, 5.093% (SOFR - 1mo. + 1.45%), 5/25/2056 (n)

1,368,460

1,370,267

OBX Trust, 2026-NQM8, “A1”, 5.297%, 5/25/2066 (n)

319,287

316,496

Octagon 57 Ltd., 2021-1A, “CR”, FLR, 5.602% (SOFR - 3mo. + 1.85%), 10/15/2034 (n)

750,000

751,879

Palmer Square Loan Funding 2024-1A Ltd., “A1R”, FLR, 4.572% (SOFR - 3mo. + 0.82%), 10/15/2032 (n)

225,933

225,792

Palmer Square Loan Funding 2024-1A Ltd., “BR”, FLR, 5.202% (SOFR - 3mo. + 1.45%), 10/15/2032 (n)

120,000

120,004

Palmer Square Loan Funding 2025-2A Ltd., “B”, FLR, 5.452% (SOFR - 3mo. + 1.7%), 7/15/2033 (n)

500,000

499,551

Palmer Square Loan Funding 2025-2A Ltd., “D”, FLR, 8.252% (SOFR - 3mo. + 4.5%), 7/15/2033 (n)

1,375,000

1,381,329

Park Avenue Institutional Advisers CLO Ltd., 2019-2, FLR, 7.152% (SOFR - 3mo. + 3.4%), 10/15/2034 (n)

992,908

986,539

PFP III 2025-12 Ltd., “B”, FLR, 5.68% (SOFR - 1mo. + 2.0421%), 12/18/2042 (n)

100,000

100,234

PFP III 2026-13 Ltd., “AS”, FLR, 5.288% (SOFR - 1mo. + 1.65%), 8/18/2043 (n)

1,000,000

1,003,074

PFP III 2026-13 Ltd., “B”, FLR, 5.488% (SOFR - 1mo. + 1.85%), 8/18/2043 (n)

950,000

952,933

PFS Financing Corp., 2026-A, “A”, FLR, 4.336% (SOFR - 1mo. + 0.7%), 2/15/2030 (n)

1,142,000

1,144,779

PLYM Commercial Mortgage Trust, 2026-IND, “C”, FLR, 5.289% (SOFR - 1mo. + 1.65%), 3/15/2043 (n)

164,206

164,309

PMT Loan Trust, 2025-CNF2, “A26”, FLR, 5.043% (SOFR - 1mo. + 1.4%), 1/25/2057 (n)

356,761

358,023

PMT Loan Trust, 2025-INV10, “A36”, FLR, 4.993% (SOFR - 1mo. + 1.35%), 10/01/2056 (n)

198,224

198,268

PMT Loan Trust, 2025-INV12, “A35”, FLR, 4.943% (SOFR - 1mo. + 1.3%), 12/25/2056 (n)

260,689

260,545

PMT Loan Trust, 2026-CNF1, “A26”, FLR, 4.843% (SOFR - 1mo. + 1.2%), 1/25/2057 (n)

217,522

217,040

PMT Loan Trust, 2026-CNF4, “A23”, FLR, 4.993% (SOFR - 1mo. + 1.35%), 5/25/2057 (n)

417,360

417,759

PMT Loan Trust, 2026-INV2, “A35”, FLR, 4.793% (SOFR - 1mo. + 1.15%), 1/25/2057 (n)

1,272,233

1,262,642

PMT Loan Trust, 2026-INV4, “A36”, FLR, 5.093% (SOFR - 1mo. + 1.45%), 3/25/2057 (n)

599,082

598,972

PRM Loan Trust, 2025-PRM6, “A”, 4.629%, 7/05/2033 (n)

123,326

121,760

Provident Funding Mortgage Trust, 2025-1, “A”, 5.5%, 2/25/2055 (n)

156,433

155,605

Provident Funding Mortgage Trust, 2025-2, “A4”, 5.5%, 6/25/2055 (n)

98,203

97,775

Provident Funding Mortgage Trust, 2025-5, “A4”, 5.5%, 11/25/2055 (n)

561,049

557,701

Rate Mortgage Trust, 2025-J3, “A27”, FLR, 5.193% (SOFR - 1mo. + 1.55%), 11/25/2055 (n)

573,909

575,118

Santander Drive Auto Receivables Trust, 2025-1, “A3”, 4.74%, 1/16/2029 

27,659

27,677

Sequoia Mortgage Trust, 2026-Med2, “A1A”, 5.613%, 8/25/2056 (n)

1,068,514

1,058,843

Shackleton 2019-14A CLO Ltd., “BRR”, FLR, 5.279% (SOFR - 3mo. + 1.55%), 7/20/2034 (n)

270,916

270,957

Speak CLO Ltd., 2014-1A, “BR4”, FLR, 5.349% (SOFR - 3mo. + 1.6%), 4/17/2034 (n)

650,000

650,680

Speak CLO Ltd., 2014-1A, “CR4”, FLR, 5.699% (SOFR - 3mo. + 1.95%), 4/17/2034 (n)

250,000

250,615

Starwood Commercial Mortgage, 2025-FL4, “AS”, FLR, 5.347% (SOFR - 1mo. + 1.7%), 11/19/2042 (n)

2,500,000

2,502,310

Stellantis Financial Underwritten Enhanced Lease Trust, 2025-AA, “A2”, 4.63%, 7/20/2027 (n)

25,862

25,882

STORE Master Funding LLC, 2025-1A, “A2”, 4.98%, 10/20/2055 (n)

516,027

498,394

STORE Master Funding LLC, 2026-1A, “A2”, 5.31%, 6/20/2056 (n)

1,334,109

1,307,598

Taco Bell Funding LLC, 2025-1A, “A2I”, 4.821%, 8/25/2055 (n)

262,427

256,111

TCW Gem Ltd., 2020-1A, “BR3”, FLR, 5.329% (SOFR - 3mo. + 1.6%), 4/20/2034 (n)

300,000

300,500

TPG Real Estate Finance, 2025-FL7, “AS”, FLR, 5.339% (SOFR - 1mo. + 1.7%), 6/18/2043 (n)

2,000,000

2,001,416

TPG Real Estate Finance, 2025-FL7, “B”, FLR, 5.588% (SOFR - 1mo. + 1.95%), 6/18/2043 (n)

356,790

356,995

Trinitas CLO Ltd., 2017-6A, “B1R4”, FLR, 5.46% (SOFR - 3mo. + 1.65%), 1/25/2034 (n)

700,000

700,480

Trinitas CLO Ltd., 2024-29A, “D1R”, FLR, 6.603% (SOFR - 3mo. + 2.88%), 10/23/2039 (n)

2,500,000

2,500,000

Unity-Peace Park CLO Ltd., 2022-1A, “CR”, FLR, 5.379% (SOFR - 3mo. + 1.65%), 4/20/2035 (n)

1,242,757

1,242,819

Verus Securitization Trust, 2024-3, “A2”, 6.642%, 4/25/2069 (n)

97,056

97,343

Verus Securitization Trust, 2025-9, “A1”, 4.935%, 10/27/2070 (n)

104,880

103,475

Volvo Financial Equipment LLC, 2026-1A, “A2”, 3.9%, 11/15/2028 (n)

179,000

178,391

Wind River 2024-1A CLO Ltd., “BR”, FLR, 5.379% (SOFR - 3mo. + 1.65%), 4/20/2037 (n)

2,000,000

2,002,010

$136,473,464

Auto & Auto Components – 0.6%

Ford Motor Credit Co. LLC, 5.73%, 9/05/2030 

$

487,000

$486,765

Ford Motor Credit Co. LLC, 6.05%, 3/05/2031 

660,000

665,705

Hyundai Capital America, 5.3%, 1/08/2030 (n)

246,000

247,474

4


MFS Active Core Plus Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Auto & Auto Components – continued

Hyundai Capital America, 6.375%, 4/08/2030 (n)

$

1,389,000

$1,438,130

Hyundai Capital America, 5.25%, 6/21/2033 (n)

491,000

481,980

$3,320,054

Brokerage & Asset Managers – 3.1%

Charles Schwab Corp., 4.914% to 11/14/2035, FLR (SOFR - 1 day + 1.23%) to 11/14/2036 

$

2,713,000

$2,580,797

Charles Schwab Corp., 5% to 6/01/2027, FLR (CMT - 5yr. + 3.256%) to 6/01/2170 

1,680,000

1,681,683

Charles Schwab Corp., 6.1% to 6/01/2031, FLR (CMT - 1yr. + 2.25%) to 9/01/2174 

1,216,000

1,199,388

Citadel Securities Global Holdings LLC, 5.75%, 3/27/2036 (n)

2,362,000

2,292,174

Jefferies Financial Group, Inc., 5.125%, 4/28/2031 

82,000

80,193

Jefferies Financial Group, Inc., 5.5%, 2/15/2036 

3,289,000

3,114,388

LPL Holdings, Inc., 4%, 3/15/2029 (n)

139,000

134,851

LPL Holdings, Inc., 4.375%, 5/15/2031 (n)

231,000

219,888

LPL Holdings, Inc., 6%, 5/20/2034 

192,000

193,764

LPL Holdings, Inc., 5.75%, 6/15/2035 

2,669,000

2,626,933

Nomura Holdings, Inc., 5.043%, 6/10/2036 

1,419,000

1,369,683

Nomura Holdings, Inc., 5.545%, 7/14/2036 

200,000

195,463

Nomura Holdings, Inc., 7% to 1/15/2031, FLR (CMT - 5yr. + 3.084%) to 1/15/2174 

1,200,000

1,211,857

$16,901,062

Building – 1.4%

Ferguson Enterprises, Inc., 5%, 10/03/2034 

$

1,694,000

$1,640,613

JH North America Holdings, Inc., 6.125%, 7/31/2032 (n)

2,066,000

2,084,183

Patrick Industries, Inc., 4.75%, 5/01/2029 (n)

641,000

630,226

Patrick Industries, Inc., 6.375%, 11/01/2032 (n)

1,432,000

1,429,830

Quikrete Holdings, Inc., 6.375%, 3/01/2032 (n)

1,874,000

1,897,350

$7,682,202

Business Services – 1.9%

Beacon Point DC LLC, 6.129%, 11/30/2042 (n)

$

2,356,000

$2,236,095

CoreWeave, Inc., 9.75%, 10/01/2031 (n)

2,024,000

1,809,909

Global Payments, Inc., 2.9%, 11/15/2031 

1,965,000

1,716,907

Paychex, Inc., 5.6%, 4/15/2035 

2,320,000

2,302,516

QTS Fayetteville I Dc1-2 LLC, 5.7%, 4/15/2036 (n)

2,621,000

2,371,676

$10,437,103

Chemicals – 0.3%

SCIH Salt Holdings, Inc., 8%, 8/15/2032 (n)

$

1,900,000

$1,920,345

Conglomerates – 0.4%

Regal Rexnord Corp., 6.3%, 2/15/2030 

$

271,000

$279,354

Regal Rexnord Corp., 6.4%, 4/15/2033 

1,663,000

1,726,905

$2,006,259

Consumer Services – 0.8%

CBRE Services, Inc., 5.95%, 8/15/2034 

$

1,939,000

$1,975,475

CBRE Services, Inc., 5.25%, 6/01/2036 

273,000

263,023

Raven Acquisition Holdings LLC, 6.875%, 11/15/2031 (n)

1,987,000

1,979,617

$4,218,115

5


MFS Active Core Plus Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Diversified Financial Services – 0.9%

Avolon Holdings Funding Ltd., 4.95%, 10/15/2032 (n)

$

2,267,000

$2,184,787

Macquarie AirFinance Holdings Ltd., 6.4%, 3/26/2029 (n)

174,000

178,634

SMBC Aviation Capital Finance DAC, 5.2%, 7/23/2031 (n)

704,000

699,603

SMBC Aviation Capital Finance DAC, 5.55%, 4/03/2034 (n)

400,000

396,039

SMBC Aviation Capital Finance DAC, 5.25%, 11/26/2035 (n)

1,361,000

1,307,441

SMBC Aviation Capital Finance DAC, 5.7%, 7/23/2036 (n)

400,000

395,144

$5,161,648

Electrical Equipment – 0.3%

Arrow Electronics, Inc., 5.875%, 4/10/2034 

$

1,723,000

$1,741,530

Emerging Market Quasi-Sovereign – 0.2%

Office Cherifien des Phosphates S.A. (Kingdom of Morocco), 6.75%, 5/02/2034 (n)

$

400,000

$415,094

Petroleos Mexicanos, 5.95%, 1/28/2031 

118,000

116,626

Petroleos Mexicanos, 6.35%, 2/12/2048 

443,000

357,362

$889,082

Emerging Market Sovereign – 3.1%

Commonwealth of Bahamas, 8.95%, 10/15/2032 

$

1,000,000

$1,117,890

Republic of Argentina, 3.5%, 7/09/2041 

1,500,000

1,055,700

Republic of Colombia, 7.75%, 11/07/2036 

1,400,000

1,488,900

Republic of Cote d'Ivoire, 7.625%, 1/30/2033 

1,300,000

1,381,050

Republic of Ecuador, 6.9%, 7/31/2035 

1,200,000

1,097,400

Republic of Guatemala, 6.6%, 6/13/2036 

1,400,000

1,461,124

Republic of Hungary, 5.5%, 3/26/2036 (n)

1,400,000

1,378,732

Republic of Panama, 6.7%, 1/26/2036 

450,000

472,297

Republic of Paraguay, 6.65%, 3/04/2055 

800,000

813,640

Republic of Peru, 5.875%, 8/08/2054 

500,000

474,750

Republic of Romania, 6%, 5/25/2034 

1,300,000

1,268,160

Republic of Serbia, 6%, 6/12/2034 

800,000

799,320

Republic of South Africa, 7.1%, 11/19/2036 

1,000,000

1,065,458

Republic of South Africa, 7.25%, 12/11/2055 (n)

1,300,000

1,264,431

Republic of Turkey, 5.95%, 1/15/2031 

400,000

391,027

United Mexican States, 6%, 5/07/2036 

200,000

195,090

United Mexican States, 6.875%, 5/13/2037 

800,000

821,680

United Mexican States, 6.625%, 1/29/2038 

500,000

500,750

$17,047,399

Energy - Independent – 1.0%

EQT Corp., 5%, 1/15/2029 

$

328,000

$328,238

EQT Corp., 4.75%, 1/15/2031 

1,128,000

1,108,375

Occidental Petroleum Corp., 5.55%, 10/01/2034 

719,000

725,224

Santos Finance Ltd., 6.875%, 9/19/2033 (n)

571,000

608,351

Santos Finance Ltd., 5.75%, 11/13/2035 (n)

2,532,000

2,496,295

$5,266,483

Energy - Integrated – 0.3%

BP Capital Markets PLC, 6.45% to 3/01/2034, FLR ((CMT - 5yr. + 2.153%) + 0.25%) to 3/01/2054, FLR ((CMT - 5yr. + 2.153%) +

1%) to 9/01/2172 

$

768,000

$788,153

Eni S.p.A., 5.5%, 5/15/2034 (n)

600,000

601,039

$1,389,192

6


MFS Active Core Plus Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Entertainment & Leisure – 0.4%

Six Flags Entertainment Corp., 6.625%, 5/01/2032 (n)

$

1,952,000

$1,978,608

Food & Beverages – 1.3%

Bacardi Ltd., 5.15%, 5/15/2038 (n)

$

147,000

$134,304

Constellation Brands, Inc., 4.8%, 5/01/2030 

62,000

61,481

JBS N.V./JBS USA Foods Group Holdings, Inc./JBS USA Food Co., 5.75%, 4/01/2033 

1,183,000

1,199,856

JBS N.V./JBS USA Foods Group Holdings, Inc./JBS USA Food Co., 5.95%, 4/20/2035 

1,873,000

1,894,332

Performance Food Group Co., 6.125%, 9/15/2032 (n)

2,045,000

2,049,245

Post Holdings, Inc., 6.25%, 10/15/2034 (n)

2,079,000

2,004,256

$7,343,474

Global Systemically Important Banks – 5.5%

Bank of America Corp., 5.288% to 4/25/2033, FLR (SOFR - 1 day + 1.630%) to 4/25/2034 

$

418,000

$415,957

Bank of America Corp., 5.744% to 2/12/2035, FLR (SOFR - 1 day + 1.697%) to 2/12/2036 

3,343,000

3,330,099

Bank of America Corp., 3.846% to 3/08/2032, FLR (CMT - 1yr. + 2%) to 3/08/2037 

247,000

226,828

Bank of America Corp., 6.25% to 7/26/2030, FLR (CMT - 5yr. + 2.351%) to 10/26/2173 

129,000

129,165

Barclays PLC, 7.437% to 11/02/2032, FLR (CMT - 1yr. + 3.5%) to 11/02/2033 

2,000,000

2,193,504

Barclays PLC, 5.586% to 6/26/2036, FLR (SOFR - 1 day + 1.505%) to 6/26/2037 

200,000

194,669

Citigroup, Inc., 6.875% to 8/15/2030, FLR (CMT - 5yr. + 2.89%) to 11/15/2173 

2,430,000

2,459,724

Citigroup, Inc., 6.5% to 5/15/2031, FLR (CMT - 5yr. + 2.745%) to 5/15/2175 

81,000

81,418

Goldman Sachs Group, Inc., 2.65% to 10/21/2031, FLR (SOFR - 1 day + 1.264%) to 10/21/2032 

439,000

385,009

Goldman Sachs Group, Inc., 3.102% to 2/24/2032, FLR (SOFR - 1 day + 1.41%) to 2/24/2033 

2,537,000

2,265,223

Goldman Sachs Group, Inc., 5.655% to 7/21/2036, FLR (SOFR - 1 day + 1.45%) to 7/21/2037 

664,000

657,807

Goldman Sachs Group, Inc., 6.85%, 8/10/2174 

378,000

387,389

HSBC Holdings PLC, 6.75% to 5/18/2033, FLR (CMT - 5yr. + 2.513%) to 11/18/2174 

2,442,000

2,423,158

JPMorgan Chase & Co., 4.851% to 7/25/2027, FLR (SOFR - 1 day + 1.99%) to 7/25/2028 

680,000

681,601

JPMorgan Chase & Co., 5.766%, 4/22/2035 

602,000

613,854

JPMorgan Chase & Co., 4.946% to 10/22/2034, FLR (SOFR - 1 day + 1.34%) to 10/22/2035 

2,792,000

2,701,793

JPMorgan Chase & Co., 6.1%, 7/01/2174 

294,000

294,437

Morgan Stanley, 5.449% to 7/20/2028, FLR (SOFR - 1 day + 1.63%) to 7/20/2029 

424,000

428,373

Morgan Stanley, 5.17% to 7/14/2031, FLR (SOFR - 1 day + 1.158%) to 7/14/2032 

82,000

81,389

Morgan Stanley, 5.32% to 7/19/2034, FLR (SOFR - 1 day + 1.555%) to 7/19/2035 

450,000

443,127

Morgan Stanley, 5.664% to 4/17/2035, FLR (SOFR - 1 day + 1.757%) to 4/17/2036 

2,622,000

2,627,812

Morgan Stanley, 5.605% to 7/17/2036, FLR (SOFR - 1 day + 1.429%) to 7/17/2037 

246,000

243,563

Morgan Stanley, 5.942% to 2/07/2034, FLR (CMT - 5yr. + 1.8%) to 2/07/2039 

238,000

238,859

UBS Group AG, 5.699% to 2/08/2034, FLR (CMT - 1yr. + 1.77%) to 2/08/2035 (n)

2,409,000

2,421,633

UBS Group AG, 4.375% to 2/10/2031, FLR (CMT - 1yr. + 3.313%) to 8/10/2171 (n)

1,000,000

911,789

Wells Fargo & Co., 5.574% to 7/25/2028, FLR (SOFR - 1 day + 1.74%) to 7/25/2029 

614,000

622,372

Wells Fargo & Co., 3.35% to 3/02/2032, FLR (SOFR - 1 day + 1.5%) to 3/02/2033 

1,113,000

1,010,014

Wells Fargo & Co., 4.892% to 9/15/2035, FLR (SOFR - 1 day + 1.34%) to 9/15/2036 

1,983,000

1,890,856

$30,361,422

Industrial – 0.6%

Booz Allen Hamilton, Inc., 5.9%, 1/30/2034 

$

1,000,000

$984,170

Booz Allen Hamilton, Inc., 5.95%, 4/15/2035 

2,389,000

2,368,558

$3,352,728

Insurance – 1.2%

Corebridge Financial, Inc., 5.75%, 1/15/2034 

$

3,066,000

$3,092,284

MetLife, Inc., 6.35% to 3/15/2035, FLR (CMT - 5yr. + 2.078%) to 3/15/2055 

185,000

188,230

Nippon Life Insurance Co., 6.5% to 4/30/2035, FLR (CMT - 5yr. + 3.189%) to 4/30/2055 (n)

600,000

616,131

Sammons Financial Group, Inc., 6.875%, 4/15/2034 (n)

1,482,000

1,525,350

7


MFS Active Core Plus Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Insurance – continued

Sammons Financial Group, Inc., 5.95%, 6/15/2036 (n)

$

1,124,000

$1,072,710

$6,494,705

Insurance - Health – 0.4%

Horseshoe Funding Trust I, 6.062%, 2/15/2036 (n)

$

2,415,000

$2,398,667

Insurance - Property & Casualty – 2.0%

Alliant Holdings Intermediate LLC/Alliant Holdings Co-Issuer, 5.875%, 11/01/2029 (n)

$

2,012,000

$1,997,636

Arthur J. Gallagher & Co., 5.45%, 7/15/2034 

294,000

291,714

Arthur J. Gallagher & Co., 5.15%, 2/15/2035 

1,767,000

1,713,867

Brown & Brown, Inc., 5.65%, 6/11/2034 

235,000

233,135

Brown & Brown, Inc., 5.55%, 6/23/2035 

2,289,000

2,236,269

Fairfax Financial Holdings Ltd., 6%, 12/07/2033 

2,361,000

2,414,252

Fairfax Financial Holdings Ltd., 5.75%, 5/20/2035 

450,000

450,300

Hub International Ltd., 7.25%, 6/15/2030 (n)

1,898,000

1,954,169

$11,291,342

Interactive Media Services – 0.4%

Snap, Inc., 6.875%, 3/01/2033 (n)

$

2,109,000

$2,068,100

International Market Quasi-Sovereign – 0.0%

Electricite de France S.A., 6.9%, 5/23/2053 (n)

$

200,000

$206,889

Machinery & Tools – 0.8%

Ashtead Capital, Inc., 5.5%, 8/11/2032 (n)

$

200,000

$201,353

Ashtead Capital, Inc., 5.8%, 4/15/2034 (n)

2,306,000

2,315,937

EquipmentShare.com, Inc., 7.125%, 7/01/2034 (n)

1,804,000

1,775,413

$4,292,703

Metals & Mining – 1.1%

Anglo American Capital PLC, 5.5%, 5/02/2033 (n)

$

450,000

$450,693

FMG Resources (August 2006) Pty Ltd., 4.375%, 4/01/2031 (n)

787,000

743,073

FMG Resources (August 2006) Pty Ltd., 6.125%, 4/15/2032 (n)

1,282,000

1,296,201

IAMGOLD Corp., 5.75%, 10/15/2028 (n)

1,575,000

1,572,021

Northern Star Resources Ltd. Co., 6.125%, 4/11/2033 (n)

1,473,000

1,499,058

Samarco Mineracao S.A., 9% (4% Cash + 5% PIK) to 12/30/2026, (5.5% Cash + 3.5% PIK) to 12/30/2027, 9.25% Cash to

12/30/2029, 9.5% Cash to 6/30/2031 (n)(p)

661,465

667,887

$6,228,933

Midstream – 2.1%

DCP Midstream Operating LP, 3.25%, 2/15/2032 

$

1,904,000

$1,742,783

Energy Transfer LP, 5.35%, 1/15/2036 

2,591,000

2,527,956

Plains All American Pipeline LP, 5.7%, 9/15/2034 

238,000

238,479

Plains All American Pipeline LP, 5.6%, 1/15/2036 

2,326,000

2,291,935

Targa Resources Corp., 6.125%, 3/15/2033 

2,377,000

2,462,864

Targa Resources Partners LP/Targa Resources Finance Corp., 4%, 1/15/2032 

425,000

399,788

Venture Global LNG, Inc., 7%, 1/15/2030 (n)

2,046,000

2,105,767

$11,769,572

Mortgage-Backed – 6.9%

Fannie Mae, 4.643%, 2/25/2045 (n)

$

36,337

$36,336

Fannie Mae, 2.5%, 10/01/2051 - 7/01/2052 

1,384,778

1,131,337

Fannie Mae, 2%, 1/01/2052 - 6/01/2052 

2,334,713

1,825,518

8


MFS Active Core Plus Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Mortgage-Backed – continued

Fannie Mae, 6%, 10/01/2053 - 9/01/2054 

$

2,579,340

$2,609,254

Fannie Mae, 5.043%, 12/25/2054 

98,772

99,434

Fannie Mae, 5.143%, 12/25/2054 

1,086,831

1,096,292

Fannie Mae, UMBS, 2.5%, 11/01/2051 - 4/01/2052 

377,198

309,137

Fannie Mae, UMBS, 2%, 3/01/2052 

1,293,501

1,015,503

Fannie Mae, UMBS, 3%, 6/01/2052 - 8/01/2052 

621,569

531,022

Fannie Mae, UMBS, 5%, 12/01/2054 

2,069,048

2,003,534

Freddie Mac, 5.643%, 11/25/2053 

1,495,229

1,535,880

Freddie Mac, 5.093%, 2/25/2055 

204,732

206,310

Freddie Mac , 6%, 3/01/2054 

538,460

545,352

Freddie Mac, UMBS, 5%, 8/01/2040 - 6/01/2056 

2,928,164

2,866,571

Freddie Mac, UMBS, 3.5%, 9/01/2051 - 9/01/2052 

2,003,802

1,778,897

Freddie Mac, UMBS, 2%, 3/01/2052 - 8/01/2052 

2,300,991

1,805,074

Freddie Mac, UMBS, 2.5%, 5/01/2052 - 9/01/2052 

2,417,275

1,988,728

Freddie Mac, UMBS, 3%, 5/01/2052 

1,359,442

1,161,412

Freddie Mac, UMBS, 5.5%, 8/01/2054 - 10/01/2054 

960,202

954,988

Freddie Mac, UMBS, 6.5%, 9/01/2054 - 11/01/2054 

209,286

216,914

Freddie Mac, UMBS, 6%, 2/01/2055 

98,458

100,110

Freddie Mac, UMBS, 4%, 5/01/2055 

643,571

587,556

Freddie Mac, UMBS, 4.5%, 11/01/2055 - 2/01/2056 

926,484

869,860

Ginnie Mae, 2%, 4/20/2052 

336,509

270,276

Ginnie Mae, 2.5%, 4/20/2052 

479,020

400,826

Ginnie Mae, 4.838%, 3/20/2054 

893,718

896,669

Ginnie Mae, 5.5%, 4/20/2055 

179,286

178,186

Ginnie Mae, 7.589%, 5/20/2055 

174,305

176,930

Ginnie Mae, 6.117%, 6/20/2055 

73,055

69,406

Ginnie Mae, 6.192%, 6/20/2055 

41,627

39,569

Ginnie Mae, 4.488%, 9/20/2065 

527,741

529,047

Ginnie Mae, 2.255%, 3/20/2066 (i)

167,125

5,756

UMBS, TBA, 5%, 9/14/2056 

2,500,000

2,411,379

UMBS, TBA, 5.5%, 9/14/2056 

2,675,000

2,647,482

UMBS, TBA, 3%, 9/25/2056 

6,225,000

5,304,083

$38,204,628

Municipals – 0.2%

California Public Finance Authority Rev., Taxable (Children's Hospital Los Angeles), “A”, AGM, 5.4%, 11/15/2031 

$

684,000

$691,271

Massachusetts Development Finance Agency Rev., Taxable (Middlesex Sustainable Energy Partners), “B”, 7.375%, 10/01/2035 

400,000

402,287

$1,093,558

Natural Gas - Distribution – 0.0%

Boston Gas Co., 3.757%, 3/16/2032 (n)

$

270,000

$248,512

Network & Telecom – 0.4%

NTT Finance Corp., 5.258%, 11/01/2033 (n)

$

200,000

$195,812

NTT Finance Corp., 5.502%, 7/16/2035 (n)

2,078,000

2,040,783

$2,236,595

Non-Global Systemically Important Banks – 1.3%

Capital One Financial Corp., 7.624% to 10/30/2030, FLR (SOFR - 1 day + 3.07%) to 10/30/2031 

$

328,000

$355,532

Capital One Financial Corp., 6.7%, 11/29/2032 

670,000

715,170

Capital One Financial Corp., 6.377% to 6/08/2033, FLR (SOFR - 1 day + 2.86%) to 6/08/2034 

683,000

709,718

Capital One Financial Corp., 6.051% to 2/01/2034, FLR (SOFR - 1 day + 2.26%) to 2/01/2035 

100,000

101,785

Capital One Financial Corp., 5.197% to 9/11/2035, FLR (SOFR - 1 day + 1.63%) to 9/11/2036 

1,845,000

1,759,716

9


MFS Active Core Plus Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Non-Global Systemically Important Banks – continued

Capital One Financial Corp., 5.399% to 1/30/2036, FLR (SOFR - 1 day + 1.508%) to 1/30/2037 

$

164,000

$158,109

Deutsche Bank AG, 5.403% to 9/11/2034, FLR (SOFR - 1 day + 2.05%) to 9/11/2035 

2,185,000

2,138,538

Industrial Subordinated Trust 2.0, 6.55% to 4/15/2031, FLR (CMT - 5yr. + 2.864%) to 4/15/2036 (n)

600,000

600,300

Macquarie Bank Ltd. of London, 6.125% to 3/08/2027, FLR (Swap Rate - 5yr. + 4.332%) to 12/31/2165 (n)

445,000

446,917

$6,985,785

Real Estate - Other – 0.4%

First Industrial LP, 5.25%, 1/15/2031 

$

2,123,000

$2,120,529

Real Estate - Retail – 0.9%

Brixmor Operating Partnership LP, REIT, 5.75%, 2/15/2035 

$

2,000,000

$2,017,972

STORE Capital Corp., REIT, 4.5%, 3/15/2028 

291,000

289,122

STORE Capital Corp., REIT, 4.625%, 3/15/2029 

278,000

274,409

STORE Capital LLC, REIT, 4.95%, 2/11/2031 

1,569,000

1,533,829

STORE Capital LLC, REIT, 2.7%, 12/01/2031 

957,000

832,170

$4,947,502

Real Estate - Storage & Office – 1.8%

Boston Properties LP, REIT, 6.5%, 1/15/2034 

$

259,000

$269,812

Boston Properties LP, REIT, 5.75%, 1/15/2035 

3,646,000

3,612,708

Highwoods Realty LP, 5.35%, 1/15/2033 

3,394,000

3,321,331

Vornado Realty LP, 5.75%, 2/01/2033 

2,537,000

2,528,705

$9,732,556

Retail & E-commerce – 1.6%

Alimentation Couche-Tard, Inc., 5.267%, 2/12/2034 (n)

$

270,000

$266,067

Alimentation Couche-Tard, Inc., 5.077%, 9/29/2035 (n)

35,000

33,748

AutoNation, Inc., 5.89%, 3/15/2035 

2,404,000

2,403,324

Beach Acquisition Bidco LLC, 10% (10% Cash or 10.75% PIK), 7/15/2033 (n)(p)

1,965,321

2,109,481

Dick's Sporting Goods, 3.15%, 1/15/2032 

2,171,000

1,943,966

PetSmart LLC/PetSmart Finance Corp., 7.5%, 9/15/2032 (n)

2,100,000

2,120,206

$8,876,792

Semiconductor & Electronic Components – 0.3%

Broadcom, Inc., 5.2%, 4/15/2032 

$

248,000

$245,536

Broadcom, Inc., 3.137%, 11/15/2035 

303,000

243,785

Broadcom, Inc., 4.8%, 2/15/2036 

1,390,000

1,275,553

$1,764,874

Software – 0.9%

Oracle Corp., 5.2%, 9/26/2035 

$

336,000

$301,425

Oracle Corp., 5.7%, 2/04/2036 

1,687,000

1,559,874

Oracle Corp., 5.95%, 9/26/2055 

95,000

75,474

Salesforce, Inc., 5.2%, 3/15/2033 

800,000

789,854

Salesforce, Inc., 5.55%, 3/15/2036 

2,261,000

2,219,656

$4,946,283

Telecommunications - Wireless – 1.0%

American Tower Corp., 5.4%, 1/31/2035 

$

756,000

$749,428

Rogers Communications, Inc., 3.8%, 3/15/2032 

1,998,000

1,835,964

T-Mobile USA, Inc., 2.55%, 2/15/2031 

256,000

229,683

T-Mobile USA, Inc., 4.95%, 11/15/2035 

608,000

578,188

T-Mobile USA, Inc., 5%, 2/15/2036 

166,000

157,761

10


MFS Active Core Plus Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Telecommunications - Wireless – continued

Vodafone Group PLC, 5.35%, 6/18/2036 

$

1,531,000

$1,484,284

Vodafone Group PLC, 5.625%, 2/10/2053 

369,000

330,458

$5,365,766

Tobacco – 1.0%

B.A.T. Capital Corp., 6.343%, 8/02/2030 

$

227,000

$237,120

B.A.T. Capital Corp., 4.742%, 3/16/2032 

252,000

246,590

B.A.T. Capital Corp., 4.625%, 3/22/2033 

1,708,000

1,636,049

Japan Tobacco, Inc., 5.85%, 6/15/2035 (n)

1,704,000

1,748,509

Philip Morris International, Inc., 5.375%, 2/15/2033 

735,000

741,629

Philip Morris International, Inc., 5.25%, 2/13/2034 

174,000

173,336

Philip Morris International, Inc., 4.875%, 4/30/2035 

607,000

583,983

Philip Morris International, Inc., 4.875%, 4/29/2036 

138,000

131,880

$5,499,096

Transportation & Logistics – 0.5%

Triton International Ltd., 5.15%, 2/15/2033 

$

2,489,000

$2,394,611

Yinson Bergenia Production B.V., 8.498%, 1/31/2045 (n)

195,166

209,166

$2,603,777

Travel, Gaming, & Lodging – 0.3%

Las Vegas Sands Corp., 5.625%, 6/15/2028 

$

943,000

$951,094

Marriott International, Inc., 2.85%, 4/15/2031 

278,000

252,369

Marriott International, Inc., 5.25%, 10/15/2035 

604,000

589,687

$1,793,150

U.S. Treasury Obligations – 24.2%

U.S. Treasury Bonds, 4.5%, 2/15/2044 

$

1,900,000

$1,747,258

U.S. Treasury Bonds, 4.625%, 11/15/2044 (f)

5,450,000

5,068,074

U.S. Treasury Bonds, 4.875%, 8/15/2045 

5,100,000

4,879,266

U.S. Treasury Bonds, 4.625%, 11/15/2045 

54,095,000

50,071,684

U.S. Treasury Bonds, 4.25%, 2/15/2054 

3,460,000

2,946,271

U.S. Treasury Bonds, 4.5%, 11/15/2054 

5,409,000

4,803,446

U.S. Treasury Bonds, 4.75%, 8/15/2055 

1,500,000

1,387,559

U.S. Treasury Bonds, 4.625%, 11/15/2055 

23,700,000

21,485,531

U.S. Treasury Bonds, 5%, 5/15/2056 

1,700,000

1,638,375

U.S. Treasury Notes, 4.125%, 10/31/2029 

13,645,000

13,522,941

U.S. Treasury Notes, 3.875%, 7/31/2030 

26,280,000

25,730,789

$133,281,194

Utilities – 0.8%

Colbun S.A., 5.375%, 9/11/2035 (n)

$

605,000

$595,229

Enel Finance International N.V., 7.5%, 10/14/2032 (n)

1,625,000

1,794,974

Pacific Gas & Electric Co., 6.95%, 3/15/2034 

220,000

235,300

XPLR Infrastructure Operating Partners LP, 7.25%, 1/15/2029 (n)

1,886,000

1,949,581

$4,575,084

Total Bonds (Identified Cost, $553,831,548)

$543,369,020

11


MFS Active Core Plus Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Mutual Funds – 2.7%

Money Market Funds – 2.7%

State Street Institutional U.S. Government Money Market Fund - Premier Class, 3.62% (j) (Identified Cost, $14,864,471)

14,864,472

$14,864,471

Other Assets, Less Liabilities – (1.3)%

(7,125,555)

Net Assets – 100.0%

$551,107,936

(f)

All or a portion of the security has been segregated as collateral for open futures contracts.

(i)

Interest only security for which the fund receives interest on notional principal (Par amount). Par amount shown is the notional principal and does not

reflect the cost of the security.

(j)

The rate quoted is the annualized seven-day yield of the fund at period end.

(n)

Securities exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be sold in the ordinary course of business in

transactions exempt from registration, normally to qualified institutional buyers. At period end, the aggregate value of these securities was

$216,755,335, representing 39.3% of net assets.

(p)

Payment-in-kind (PIK) security for which interest income may be received in additional securities and/or cash.

The following abbreviations are used in this report and are defined:

AGM

Assured Guaranty Municipal

CLO

Collateralized Loan Obligation

CMT

Constant Maturity Treasury

FLR

Floating Rate. Interest rate resets periodically based on the parenthetically disclosed reference rate plus a spread (if any). The period-end rate

reported may not be the current rate. All reference rates are USD unless otherwise noted.

REIT

Real Estate Investment Trust

SOFR

Secured Overnight Financing Rate

TBA

To Be Announced

UMBS

Uniform Mortgage-Backed Security

Derivative Contracts at 8/31/26

Futures Contracts

Description

Long/

Short

Currency

Contracts

Notional

Amount

Expiration

Date

Value/Unrealized

Appreciation

(Depreciation)

Asset Derivatives

Interest Rate Futures

U.S. Treasury Ultra 30 yr

Long

USD

10

$1,100,312

December – 2026

$4,844

U.S. Treasury Ultra Note 10 yr

Short

USD

38

4,158,031

December – 2026

6,828

$11,672

Liability Derivatives

Interest Rate Futures

U.S. Treasury Note 2 yr

Long

USD

344

$70,600,625

December – 2026

$(154,719

)

U.S. Treasury Note 5 yr

Long

USD

43

4,545,235

December – 2026

(19,149

)

$(173,868

)

At August 31, 2026, the fund had liquid securities collateral with an aggregate value of $502,157 to cover any collateral or margin obligations for certain derivative contracts.

See Notes to Financial Statements

12


MFS Active Core Plus Bond ETF

Financial Statements | Statement of Assets and Liabilities

This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund. 

At 8/31/26 (unaudited)

Assets

Investments in unaffiliated issuers, at value (identified cost, $568,696,019)

$558,233,491

Foreign currency, at value (identified cost, $28)

28

Receivables for

Fund shares sold

2,449,305

Interest

5,780,647

Total assets

$566,463,471

Liabilities

Payables for

Distributions

$2,240,000

Net daily variation margin on open futures contracts

1,752

Investments purchased

2,687,431

TBA purchase commitments

10,405,801

Payable to affiliates

Investment adviser

20,551

Total liabilities

$15,355,535

Net assets

$551,107,936

Net assets consist of

Paid-in capital

$562,991,422

Total distributable earnings (loss)

(11,883,486

)

Net assets

$551,107,936

Shares of beneficial interest outstanding (unlimited number of shares authorized)

22,500,000

Net asset value per share (net assets of $551,107,936 / 22,500,000 shares of beneficial interest outstanding)

$24.49

See Notes to Financial Statements

13


MFS Active Core Plus Bond ETF

Financial Statements | Statement of Operations

This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. 

Six months ended 8/31/26 (unaudited)

Net investment income (loss)

Income

Interest

$11,007,715

Dividends from unaffiliated issuers

238,275

Other

20

Total investment income

$11,246,010

Expenses

Management fee

$740,821

Miscellaneous

495

Total expenses

$741,316

Net investment income (loss)

$10,504,694

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers

$(289,297

)

Futures contracts

(527,466

)

Net realized gain (loss)

$(816,763

)

Change in unrealized appreciation or depreciation

Unaffiliated issuers

$(13,223,214

)

Futures contracts

(161,749

)

Net unrealized gain (loss)

$(13,384,963

)

Net realized and unrealized gain (loss)

$(14,201,726

)

Change in net assets from operations

$(3,697,032

)

See Notes to Financial Statements

14


MFS Active Core Plus Bond ETF

Financial Statements |  Statements of Changes in Net Assets

These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. 

Six months ended

Year ended


8/31/26

(unaudited)


2/28/26

Change in net assets

From operations

Net investment income (loss)

$10,504,694

$4,842,553

Net realized gain (loss)

(816,763

)

(115,509

)

Net unrealized gain (loss)

(13,384,963

)

2,679,973

Change in net assets from operations

$(3,697,032

)

$7,407,017

Total distributions to shareholders

$(10,675,020

)

$(4,986,995

)

Change in net assets from fund share transactions

$332,478,996

$188,953,700

Miscellaneous capital

$323,847

$161,607

Total change in net assets

$318,430,791

$191,535,329

Net assets

At beginning of period

232,677,145

41,141,816

At end of period

$551,107,936

$232,677,145

See Notes to Financial Statements

15


MFS Active Core Plus Bond ETF

Financial Statements | Financial Highlights

The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years (or life of the fund, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund (assuming reinvestment of all distributions) held for the entire period. 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25 (c)

Net asset value, beginning of period

$25.43

$24.93

$25.00

Income (loss) from investment operations

Net investment income (loss) (d)

$0.60

$1.21

$0.29

Net realized and unrealized gain (loss)

(0.98

)

0.41

(0.10

)(g)

Total from investment operations

$(0.38

)

$1.62

$0.19

Less distributions declared to shareholders

From net investment income

$(0.58

)

$(1.15

)

$(0.28

)

From net realized gain

—

(0.01

)

—

Total distributions declared to shareholders

$(0.58

)

$(1.16

)

$(0.28

)

Miscellaneous capital (d)

$0.02

$0.04

$0.02

Net asset value, end of period (x)

$24.49

$25.43

$24.93

Total return (%) (s)(x)

(1.42

)(n)

6.81

0.86

(n)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses

0.34

(a)

0.34

0.34

(a)

Net investment income (loss)

4.82

(a)

4.82

4.98

(a)

Portfolio turnover rate (e)

24

(n)

49

10

(n)

Net assets at end of period (000 omitted)

$551,108

$232,677

$41,142

(a)

Annualized.

(c)

For the period from the commencement of the fund’s investment operations, December 5, 2024, through the stated period end.

(d)

Per share data is based on average shares outstanding.

(e)

Portfolio turnover rate excludes securities received or delivered in-kind in the process of creating or redeeming fund shares.

(g)

The per share amount varies from the net realized and unrealized gain/loss for the period because of the timing of sales of fund shares and the per

share amount of realized and unrealized gains and losses at such time.

(n)

Not annualized.

(s)

From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.

(x)

The net asset value and total return have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted

accounting principles required at period end for financial reporting purposes.

See Notes to Financial Statements

16


MFS Active Core Plus Bond ETF

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS Active Core Plus Bond ETF (the fund) is a diversified series of MFS Active Exchange Traded Funds Trust (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

(2) Significant Accounting Policies

General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued. The fund invests in foreign securities. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country’s market, economic, industrial, political, regulatory, geopolitical, environmental, public health, and other conditions.

Segment Reporting — An operating segment is defined in FASB Accounting Standards Codification Topic 280, Segment Reporting as a component of a public entity that engages in business activities from which it may recognize revenues and incur expenses, has operating results that are regularly reviewed by the entity’s chief operating decision maker (CODM) in making resource allocation decisions and assessing segment performance, and for which discrete financial information is available. The fund represents a single operating segment and the Chairman’s Committee of the fund's adviser acts as the segment’s CODM. The fund’s total returns, expense ratios, and changes in net assets which are used by the CODM to assess segment performance and to make resource allocation decisions to the segment are consistent with that presented within the fund’s financial statements.

Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.

Investment Valuations — Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.

Under the fund's valuation policy and procedures, debt instruments and floating rate loans, including restricted debt instruments, are generally valued at an evaluated or composite bid as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Futures contracts are generally valued at last posted settlement price on their primary exchange as provided by a third-party pricing service. Futures contracts for which there were no trades that day for a particular position are generally valued at the closing bid quotation on their primary exchange as provided by a third-party pricing service. Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and

17


MFS Active Core Plus Bond ETF

Notes to Financial Statements (unaudited) - continued 

market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. Pricing services generally value debt instruments assuming orderly transactions of institutional round lot sizes, but a fund may hold or transact in such securities in smaller, odd lot sizes. In instances where a fund holds an odd lot size position in a debt instrument, such position will typically be valued using the pricing agent’s institutional round lot price for the debt instrument. Odd lots may trade at lower prices than institutional round lots, and the fund may receive different prices when it sells odd lot positions than it would receive for sales of institutional round lot positions. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. Other financial instruments are derivative instruments, such as futures contracts. The following is a summary of the levels used as of August 31, 2026 in valuing the fund's assets and liabilities:

Financial Instruments

Level 1

Level 2

Level 3

Total

U.S. Treasury Bonds & U.S. Government

Agencies & Equivalents

$—

$133,281,194

$—

$133,281,194

Non - U.S. Sovereign Debt

—

18,143,370

—

18,143,370

Municipal Bonds

—

1,093,558

—

1,093,558

U.S. Corporate Bonds

—

163,944,338

—

163,944,338

Residential Mortgage-Backed Securities

—

65,999,868

—

65,999,868

Commercial Mortgage-Backed Securities

—

13,673,791

—

13,673,791

Asset-Backed Securities (including CDOs)

—

95,004,433

—

95,004,433

Foreign Bonds

—

52,228,468

—

52,228,468

Investment Companies

14,864,471

—

—

14,864,471

Total

$14,864,471

$543,369,020

$—

$558,233,491

Other Financial Instruments

Futures Contracts – Assets

$11,672

$—

$—

$11,672

Futures Contracts – Liabilities

(173,868

)

—

—

(173,868

)

For further information regarding security characteristics, see the Portfolio of Investments.

Derivatives — The fund uses derivatives primarily to increase or decrease exposure to a particular market or segment of the market, or security, to increase or decrease interest rate or currency exposure, or as alternatives to direct investments. Derivatives are used for hedging or non-hedging purposes. While hedging can reduce or eliminate losses, it can also reduce or eliminate gains. When the fund uses derivatives as an investment to increase market exposure, or for hedging purposes, gains and losses from derivative instruments may be substantially greater than the derivative’s original cost.

The derivative instruments used by the fund during the period were futures contracts. Depending on the type of derivative, a fund may exit a derivative position by entering into an offsetting transaction with a counterparty or exchange, negotiating an agreement with the derivative counterparty, or novating the position to a third party. The fund may be unable to promptly close out a futures position in instances where the daily fluctuation in the price for that type of future exceeds the daily limit set by the exchange. The fund's period end derivatives, as presented in the Portfolio of Investments and the associated Derivative Contract tables, generally are indicative of the volume of its derivative activity during the period.

18


MFS Active Core Plus Bond ETF

Notes to Financial Statements (unaudited) - continued 

The following table presents, by major type of derivative contract, the fair value, on a gross basis, of the asset and liability components of derivatives held by the fund at August 31, 2026 as reported in the Statement of Assets and Liabilities: 

Fair Value (a)

Risk

Derivative Contracts

Asset Derivatives

Liability Derivatives

Interest Rate

Futures Contracts

$11,672

$(173,868)

(a) Values presented in this table for futures contracts correspond to the values reported in the Portfolio of Investments. Only the current day net variation margin for futures contracts is reported separately within the Statement of Assets and Liabilities.

The following table presents, by major type of derivative contract, the realized gain (loss) on derivatives held by the fund for the six months ended August 31, 2026 as reported in the Statement of Operations: 

Risk

Futures

Contracts

Interest Rate

$(527,466

)

The following table presents, by major type of derivative contract, the change in unrealized appreciation or depreciation on derivatives held by the fund for the six months ended August 31, 2026 as reported in the Statement of Operations: 

Risk

Futures

Contracts

Interest Rate

$(161,749

)

Derivative counterparty credit risk is managed through formal evaluation of the creditworthiness of all potential counterparties. On certain, but not all, uncleared derivatives, the fund attempts to reduce its exposure to counterparty credit risk whenever possible by entering into an ISDA Master Agreement on a bilateral basis. The ISDA Master Agreement gives each party to the agreement the right to terminate all transactions traded under such agreement if there is a specified deterioration in the credit quality of the other party. Upon an event of default or a termination of the ISDA Master Agreement, the non-defaulting party has the right to close out all transactions traded under such agreement and to net amounts owed under each agreement to one net amount payable by one party to the other. This right to close out and net payments across all transactions traded under the ISDA Master Agreement could result in a reduction of the fund's credit risk to such counterparty equal to any amounts payable by the fund under the applicable transactions, if any.

Collateral and margin requirements differ by type of derivative. For exchange-traded and cleared derivatives (e.g., futures contracts, cleared swaps, and exchange-traded options), margin requirements are set by the exchange or clearing broker and the clearing house and collateral, in the form of cash or securities, is posted by the fund directly with the exchange or clearing broker. Collateral terms are counterparty agreement specific for uncleared derivatives (e.g., forward foreign currency exchange contracts, uncleared swap agreements, and uncleared options). Collateral, in the form of cash and securities, is held in segregated accounts with the fund's custodian in connection with these agreements. For derivatives traded under an ISDA Master Agreement, which contains a credit support annex, the collateral requirements are netted across all transactions traded under such counterparty-specific agreement and an amount is posted from one party to the other to collateralize such obligations. Cash that has been segregated or delivered to brokers to cover the fund's collateral or margin obligations under derivative contracts, if any, will be reported separately in the Statement of Assets and Liabilities as cash collateral posted for uncleared derivatives and/or cash pledged for exchange-traded or cleared derivatives. Securities pledged as collateral or margin for the same purpose, if any, are noted in the Portfolio of Investments. The fund may be required to make payments of interest on uncovered collateral or margin obligations with the broker. Any such payments are included in “Miscellaneous” expense in the Statement of Operations.

Futures Contracts — The fund entered into futures contracts which may be used to hedge against or obtain broad market exposure, interest rate exposure, or to manage duration. A futures contract represents a commitment for the future purchase or sale of an asset at a specified price on a specified date.

Upon entering into a futures contract, the fund is required to deposit with the broker, either in cash or securities, an initial margin in an amount equal to a specified percentage of the notional amount of the contract. Subsequent payments (variation margin) are made or received by the fund each day, depending on the daily fluctuations in the value of the contract, and are recorded for financial statement purposes as unrealized gain or loss by the fund until the contract is closed or expires at which point the gain or loss on futures contracts is realized.

19


MFS Active Core Plus Bond ETF

Notes to Financial Statements (unaudited) - continued 

The fund bears the risk of interest rates or securities prices moving unexpectedly, in which case, the fund may not achieve the anticipated benefits of the futures contracts and may realize a loss. While futures contracts may present less counterparty risk to the fund since the contracts are exchange traded and the exchange’s clearinghouse guarantees payments to the broker, there is still counterparty credit risk due to the insolvency of the broker. The fund's maximum risk of loss due to counterparty credit risk is equal to the margin posted by the fund to the broker plus any gains or minus any losses on the outstanding futures contracts.

Mortgage-Backed/Asset-Backed Securities — The fund invests a significant portion of its assets in asset-backed and/or mortgage-backed securities.  For these securities, the value of the debt instrument also depends on the credit quality and adequacy of the underlying assets or collateral as well as whether there is a security interest in the underlying assets or collateral.  Enforcing rights, if any, against the underlying assets or collateral may be difficult. U.S. Government securities not supported as to the payment of principal or interest by the U.S. Treasury, such as those issued by Fannie Mae, Freddie Mac, and the Federal Home Loan Banks, are subject to greater credit risk than are U.S. Government securities supported by the U.S. Treasury, such as those issued by Ginnie Mae.

Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.

Investment Transactions and Income —  Interest income is recorded on the accrual basis. All premium and discount is amortized or accreted for financial statement purposes in accordance with U.S. generally accepted accounting principles. Interest payments received in additional securities are recorded on the ex-interest date in an amount equal to the value of the security on such date.

The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.

Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.

The fund may purchase or sell mortgage-backed securities on a To Be Announced (“TBA”) basis. A TBA transaction is subject to extended settlement and typically does not designate the actual security to be delivered, but instead includes an approximate principal amount. The price of the TBA security and the date that it will be settled are fixed at the time the transaction is negotiated. The value of the security varies with market fluctuations and no interest accrues to the fund until settlement takes place. TBA purchase and sale commitments are held at carrying amount, which approximates fair value and are categorized as level 2 within the fair value hierarchy and included in TBA purchase and TBA sale commitments in the Statement of Assets and Liabilities, as applicable. Losses may arise as a result of changes in the value of the TBA investment prior to settlement date or due to counterparty non-performance. 

The fund may also enter into mortgage dollar rolls, typically TBA dollar rolls, in which the fund sells TBA mortgage-backed securities to financial institutions and simultaneously agrees to repurchase similar (same issuer, type and coupon) securities at a later date at an agreed-upon price. During the period between the sale and repurchase, the fund will not be entitled to receive interest and principal payments on the securities sold. The fund accounts for dollar roll transactions as purchases and sales and realizes gains and losses on these transactions. Dollar roll transactions involve the risk that the market value of the securities that the fund is required to purchase may decline below the agreed upon repurchase price of those securities.

To mitigate the counterparty credit risk on To Be Announced (“TBA”) transactions, mortgage dollar rolls, and other types of forward settling mortgage-backed and asset-backed security transactions, the fund whenever possible enters into a Master Securities Forward Transaction Agreement (“MSFTA”) on a bilateral basis with each of the counterparties with whom it undertakes a significant volume of transactions.  The MSFTA gives each party to the agreement the right to terminate all transactions traded under such agreement if there is a specified deterioration in the credit quality of the other party.  Upon an event of default or a termination of the MSFTA, the non-defaulting party has the right to close out all transactions traded under such agreement and to net amounts owed under each transaction to one net amount payable by one party to the other.  This right to close out and net payments across all transactions traded under the MSFTA could result in a reduction of the fund's credit risk to such counterparty equal to any amounts payable by the fund under the applicable transactions, if any.

For mortgage-backed and asset-backed securities traded under a MSFTA, the collateral and margining requirements are contract specific. Collateral amounts across all transactions traded under such agreement are netted and an amount is posted from one party to the other to collateralize such obligations. Cash posted to cover the fund's collateral or margin obligations under a MSFTA, if any, will be reported separately on the Statement of Assets and Liabilities as cash collateral posted. Securities pledged as collateral or margin for the same purpose, if any, are noted in the Portfolio of Investments.

20


MFS Active Core Plus Bond ETF

Notes to Financial Statements (unaudited) - continued 

Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for generally a three-year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.

Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.

Book/tax differences primarily relate to amortization of premium and accretion of discount of debt securities and wash sale loss deferrals.

The tax character of distributions made during the current period will be determined at fiscal year end. The tax character of distributions declared to shareholders for the last fiscal year is as follows: 

Year ended

2/28/26

Ordinary income (including any short-term capital gains)

$4,965,985

Long-term capital gains

21,010

Total distributions

$4,986,995

The federal tax cost and the tax basis components of distributable earnings were as follows: 

As of 8/31/26

Cost of investments

$569,052,227

Gross appreciation

382,909

Gross depreciation

(11,201,645

)

Net unrealized appreciation (depreciation)

$(10,818,736

)

As of 2/28/26

Undistributed ordinary income

899,700

Capital loss carryforwards

(176,766

)

Other temporary differences

(850,035

)

Net unrealized appreciation (depreciation)

2,615,667

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

As of February 28, 2026, the fund had capital loss carryforwards available to offset future realized gains. These net capital losses may be carried forward indefinitely and their character is retained as short-term and/or long-term losses. Such losses are characterized as follows: 

Short-Term

$(176,766

)

(3) Transactions with Affiliates

Investment Adviser — The fund has an Investment Management Agreement (“Management Agreement”) with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.34% of the fund’s average daily net assets. Under the Management Agreement, MFS will pay substantially all the fund’s operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), litigation expenses, the cost of proxy solicitations and shareholder meetings, the fee paid to MFS pursuant to this agreement, and such other expenses as approved by a majority of the fund’s Board of Trustees.

21


MFS Active Core Plus Bond ETF

Notes to Financial Statements (unaudited) - continued 

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly owned subsidiary of MFS, is the distributor of shares of the fund. The fund has adopted a plan in accordance with Rule 12b-1 under the Investment Company Act of 1940, as amended (the Distribution Plan). The fund’s Board of Trustees has determined not to implement payments of Rule 12b-1 fees under the Distribution Plan at this time. The fund does not currently pay compensation to MFD for any distribution services provided.

Administrator — MFS provides certain financial, legal, and other administrative services to the fund. MFS bears the costs of the services under the Management Agreement.

Trustees’ and Officers’ Compensation — Under the Management Agreement, MFS pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. MFS also pays compensation to Trustees or officers of the fund who are also officers of the investment adviser for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS and MFD. The fund did not pay any compensation to the independent Trustees for the six months ended August 31, 2026.

(4) Portfolio Securities

For the six months ended August 31, 2026, purchases and sales of investments, other than short-term obligations and in-kind transactions, were as follows: 

Purchases

Sales

U.S. Government securities

$101,229,590

$88,181,084

Non-U.S. Government securities

110,823,770

15,163,881

Securities received and delivered in-kind through subscriptions and redemptions aggregated $220,451,722 and $0, respectively. 

(5) Purchase and Sales of Fund Shares

The fund issues and redeems shares through MFD at net asset value (“NAV”) only with Authorized Participants and only in large blocks of shares (each, a Creation Unit). An Authorized Participant may purchase or redeem a Creation Unit each business day that the fund is open in exchange for the delivery or receipt of a designated portfolio of in-kind securities and/or cash. Authorized Participants may pay a fixed purchase or redemption transaction fee to offset the transfer and other transaction costs associated with the issuance and redemption of Creation Units.  An additional variable fee may be charged for certain transactions. These variable fees are included in “Miscellaneous capital” in the Statement of Changes in Net Assets.

Individual fund shares may not be purchased or redeemed directly with the fund. Shares are listed for trading on the New York Stock Exchange, and individual fund shares may only be purchased and sold in the secondary market through a financial intermediary at market price. Because the fund’s shares will trade at market prices rather than NAV, shares may trade at prices greater than NAV (at a premium), at NAV, or less than NAV (at a discount). Transactions in fund shares were as follows: 

Six months ended

8/31/26

Year ended

2/28/26

Shares

Amount

Shares

Amount

Shares sold

13,350,000

$332,478,996

7,500,000

$188,953,700

22


ITEM 8. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active Core Plus Bond ETF.

ITEM 9.  PROXY DISCLOSURES FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active Core Plus Bond ETF.

ITEM 10. REMUNERATION PAID TO DIRECTORS, OFFICERS, AND OTHERS OF OPEN-END MANAGEMENT INVESTMENT COMPANIES.

This information is disclosed as part of the financial statements included in Item 7 above for MFS Active Core Plus Bond ETF. See the Statement of Operations and Note 3 within the Notes to Financial Statements for more information.

ITEM 11. STATEMENT REGARDING BASIS FOR APPROVAL OF INVESTMENT ADVISORY CONTRACT.

23


MFS Active Core Plus Bond ETF

Board Review of Investment Management Agreement

MFS Active Core Plus Bond ETF

The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested (“independent”) Trustees, voting separately, annually approve the continuation of the Fund’s investment management agreement with MFS. The Trustees consider matters bearing on the Fund and its advisory arrangements at their meetings throughout the year, including a review of performance data at each regular meeting. In addition, the independent Trustees met several times over the course of several months beginning in April and ending in July, 2026 (“contract review meetings”) for the specific purpose of considering whether to approve the continuation of the investment management agreement for the Fund and the other investment companies that the Board oversees (the “MFS Funds”). The independent Trustees were assisted in their evaluation of the Fund’s investment management agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS during various contract review meetings. The independent Trustees were also assisted in this process by an independent consultant who was retained by and reported to the independent Trustees.

In connection with their deliberations regarding the continuation of the investment management agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant.  The investment management agreement for the Fund was considered separately, although the Trustees also took into account the common interests of all MFS Funds in their review. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services performed by MFS under the existing investment management agreement and other arrangements with the Fund. The independent Trustees considered that the Fund has a unitary management fee structure, pursuant to which MFS receives a fee covering investment management and administrative services, with MFS paying the Fund’s ordinary, recurring operating expenses (the “Unitary Fee”), subject to certain exceptions.

In connection with their contract review meetings, the Trustees received and relied upon materials that included, among other items: (i) information provided by Broadridge Financial Solutions, Inc. (“Broadridge”), an independent third party, on the investment performance of the Fund for the one-year period ended December 31, 2025 and the investment performance of a group of funds with substantially similar investment classifications/objectives (the “Broadridge performance universe”), (ii) information provided by Broadridge on the Fund’s Unitary Fee and the advisory fees and other expenses of comparable funds identified by Broadridge, as well as all other funds in the same investment classification/category (the “Broadridge expense group and universe”),  (iii) information provided by MFS on the advisory fees of portfolios of other clients of MFS, including institutional separate accounts, (iv) information regarding MFS’ financial results and financial condition, including MFS’ and certain of its affiliates’ estimated profitability from services performed for the Fund and the MFS Funds as a whole, and compared to MFS’ institutional business, (v) MFS’ views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vi) descriptions of various functions performed by MFS for the MFS Funds, such as compliance monitoring and portfolio trading practices, and (vii) information regarding the overall organization of MFS, including information about MFS’ senior management and other personnel providing investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative performance, fee and expense information prepared and provided by Broadridge was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS.

The Trustees’ conclusion as to the continuation of the investment management agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor.  Some of the factors that figured particularly in the Trustees’ deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors.  It is also important to recognize that the fee arrangements for the Fund and other MFS Funds are the result of years of review and discussion between the independent Trustees and MFS, that certain aspects of such arrangements may receive greater scrutiny in some years than in others, and that the Trustees’ conclusions may be based, in part, on their consideration of these same arrangements during the course of the year and in prior years.

Based on information provided by Broadridge and MFS, the Trustees reviewed the Fund’s total return investment performance as well as the Broadridge performance universe over the one-year period ended December 31, 2025. The total return performance of the Fund was in the 2nd quintile relative to the other funds in the universe for this one-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers). The Fund commenced operations on December 5, 2024, and has a limited operating history and performance record; therefore, no performance data for the three- or five-year periods was available.  Because of the passage of time, these performance results may differ from the performance results for more recent periods, including those shown elsewhere in this report.

24


MFS Active Core Plus Bond ETF

Board Review of Investment Management Agreement - continued

In the course of their deliberations, the Trustees took into account information provided by MFS in connection with the contract review meetings as well as during investment review meetings conducted with portfolio management personnel during the course of the year regarding the Fund’s performance. After reviewing these and related factors, the Trustees concluded, within the context of their overall conclusions regarding the investment management agreement, that they were satisfied with MFS’ responses and efforts relating to investment performance.

In assessing the reasonableness of the Fund’s Unitary Fee, the Trustees considered, among other things, information on unitary fee structures generally, as well as the terms of the investment management agreement and descriptions of various services performed or procured by MFS under the investment management agreement, including portfolio management and portfolio trading practices and administrative services. The Trustees considered the categories of expenses excluded from the Unitary Fee and therefore payable by the Fund. The Trustees also considered the Fund’s Unitary Fee as compared with the advisory fee and total expense ratios of the Broadridge expense group based on information provided by Broadridge. The Trustees considered that, according to the data provided by Broadridge, the Fund’s Unitary Fee and total expense ratio were each approximately at the applicable Broadridge expense group median.

The Trustees also considered the advisory fees charged by MFS to any institutional separate accounts advised by MFS (“separate accounts”) and unaffiliated investment companies for which MFS serves as subadviser (“subadvised funds”) that have comparable investment strategies to the Fund, if any.  In comparing these fees, the Trustees considered information provided by MFS as to the generally broader scope of services provided by MFS to the Fund, as well as the more extensive regulatory burdens imposed on MFS in managing the Fund, in comparison to separate accounts and subadvised funds.  The Trustees also considered the higher demands placed on MFS’ investment personnel and trading infrastructure as a result of the daily cash in-flows and out-flows of the Fund in comparison to separate accounts.

The Trustees considered that the investment management agreement provides for a unitary fee level that does not include pre-established breakpoints, and considered MFS’ observation that while fee waivers, breakpoints, and expense caps are common for mutual funds, these arrangements are not typically used by ETFs.

The Trustees also considered information prepared by MFS relating to MFS’ costs and profits with respect to the Fund, the MFS Funds considered as a group, and other investment companies and accounts advised by MFS, as well as MFS’ methodologies used to determine and allocate its costs to the MFS Funds, the Fund, and other accounts and products for purposes of estimating profitability.

After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the investment management agreement, that the Unitary Fee charged to the Fund represents reasonable compensation in light of the services being provided by MFS to the Fund.

In addition, the Trustees considered MFS’ resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund.  The Trustees also considered current and developing conditions in the financial services industry, including the presence of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies.  In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc.  The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser that also serves other investment companies as well as other accounts.

The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services provided to the Fund by MFS and its affiliates under agreements and plans other than the investment management agreement. The Trustees also considered the nature, extent and quality of certain other services MFS may perform or arrange for on the Fund’s behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS’ interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services provided by MFS and its affiliates on behalf of the Fund were satisfactory.

The Trustees considered so-called “fall-out benefits” to MFS such as reputational value derived from serving as investment manager to the MFS Funds. The Trustees also considered that MFS discontinued its historic practice of obtaining investment research from portfolio brokerage commissions paid by certain MFS Funds effective January 2018, and directly pays or voluntarily reimburses a Fund, if applicable, for the costs of external research acquired through the use of the Fund’s portfolio brokerage commissions.

Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including the independent Trustees, concluded that the Fund’s investment management agreement with MFS should be continued for an additional one-year period, commencing August 1, 2026.

25


MFS Active Growth ETF

ITEM 7.  FINANCIAL STATEMENTS AND FINANCIAL HIGHLIGHTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

MFS Active Growth ETF

Portfolio of Investments − 8/31/26 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

Issuer

Shares/Par

Value ($)

Common Stocks – 99.3%

Aerospace & Defense – 0.6%

RTX Corp.

11,487

$2,386,194

Auto & Auto Components – 0.9%

Tesla, Inc. (a)

8,947

$3,292,049

Brokerage & Asset Managers – 0.5%

Robinhood Markets, Inc. (a)

16,451

$1,724,229

Chemicals – 1.0%

Linde PLC

7,366

$3,606,246

Construction – 0.5%

CRH PLC

20,605

$1,942,845

Consumer Services – 1.9%

Airbnb, Inc., “A” (a)

25,210

$4,618,976

Uber Technologies, Inc. (a)

36,239

2,741,481

$7,360,457

Diversified Financial Services – 4.2%

NASDAQ, Inc.

34,987

$3,450,068

Visa, Inc., “A”

33,216

12,601,154

$16,051,222

Electrical Equipment – 4.1%

AMETEK, Inc.

16,033

$3,770,481

Amphenol Corp., “A”

33,958

5,384,041

Eaton Corp. PLC

9,399

3,777,270

W.W. Grainger, Inc.

1,970

2,579,695

$15,511,487

Energy - Renewables – 1.9%

GE Vernova, Inc.

7,984

$7,173,863

Engineering - Construction – 0.3%

Comfort Systems USA, Inc.

787

$1,216,403

Entertainment & Leisure – 0.3%

Live Nation Entertainment, Inc. (a)

5,940

$1,068,547

Food & Beverages – 0.9%

Monster Worldwide, Inc. (a)

70,720

$3,247,462

Global Systemically Important Banks – 1.1%

Morgan Stanley

20,137

$4,295,625

EGOFS-SEM

1


MFS Active Growth ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Hardware, Peripherals, & Assembly – 11.8%

Apple, Inc.

72,030

$22,822,705

Arista Networks, Inc. (a)

37,796

7,396,299

Coherent Corp. (a)

3,569

991,575

Micron Technology, Inc.

4,619

4,428,374

Sandisk Corp. of Delaware (a)

1,108

1,735,904

SK hynix, Inc., ADR

8,434

1,388,068

Western Digital Corp.

12,796

5,765,238

$44,528,163

Interactive Media Services – 13.5%

Alphabet, Inc., “A”

124,944

$42,399,746

Meta Platforms, Inc., “A”

15,565

8,908,472

$51,308,218

Machinery & Tools – 2.3%

Caterpillar, Inc.

3,590

$2,862,917

Parker Hannifin Corp.

3,158

3,093,072

Trane Technologies PLC

6,557

2,913,931

$8,869,920

Media – 1.0%

Spotify Technology S.A. (a)

4,129

$2,244,607

TKO Group Holdings, Inc.

9,078

1,657,734

$3,902,341

Medical & Health Technology & Services – 0.5%

IDEXX Laboratories, Inc. (a)

3,348

$1,863,798

Medical Equipment – 5.2%

Abbott Laboratories

18,499

$2,041,550

Boston Scientific Corp. (a)

16,663

804,823

Danaher Corp.

12,090

2,581,940

Medtronic PLC

41,273

3,741,397

Thermo Fisher Scientific, Inc.

9,063

5,592,777

Waters Corp. (a)

12,066

5,002,926

$19,765,413

Metals & Mining – 1.4%

ATI, Inc. (a)

10,031

$2,048,330

Cameco Corp.

20,228

1,997,717

Freeport-McMoRan, Inc.

16,832

1,274,856

$5,320,903

Natural Gas - Pipeline – 0.7%

Williams Cos., Inc.

36,314

$2,725,366

Non-Global Systemically Important Banks – 0.6%

Fifth Third Bancorp

38,413

$2,065,467

Oil Services – 0.6%

Baker Hughes Co.

35,505

$2,256,343

2


MFS Active Growth ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Pharmaceuticals & Biotechnology – 1.5%

Eli Lilly & Co.

1,328

$1,536,137

Gilead Sciences, Inc.

28,973

4,239,909

$5,776,046

Restaurants – 0.8%

Starbucks Corp.

29,754

$3,161,362

Retail & E-commerce – 3.9%

Amazon.com, Inc. (a)

42,416

$11,018,405

TJX Cos., Inc.

29,231

3,914,323

$14,932,728

Semiconductor & Electronic Components – 24.5%

Advanced Micro Devices (a)

9,779

$4,603,171

ASM International N.V.

2,515

2,360,408

Broadcom, Inc.

35,035

12,974,862

KLA Corp.

35,723

6,267,600

Lam Research Corp.

20,551

6,195,921

NVIDIA Corp.

244,907

54,070,568

Taiwan Semiconductor Manufacturing Co. Ltd., ADR

15,067

6,257,626

$92,730,156

Software – 9.0%

Autodesk, Inc. (a)

8,779

$2,269,635

Cadence Design Systems, Inc. (a)

9,075

3,074,429

Microsoft Corp.

39,473

20,024,258

Shopify, Inc. (a)

24,638

3,630,902

Snowflake, Inc., “A” (a)

15,665

5,191,851

$34,191,075

Telecom - Infrastructure – 0.3%

Equinix, Inc., REIT

1,213

$1,269,671

Telecom Services – 1.2%

Space Exploration Technologies, “A” (a)

30,419

$4,370,906

Tobacco – 1.0%

Philip Morris International, Inc.

20,186

$3,780,838

Travel, Gaming, & Lodging – 1.3%

Marriott International, Inc., “A”

9,601

$3,281,238

Viking Holdings Ltd. (a)

19,206

1,654,405

$4,935,643

Total Common Stocks (Identified Cost, $330,240,905)

$376,630,986

Mutual Funds – 0.7%

Money Market Funds – 0.7%

State Street Institutional U.S. Government Money Market Fund - Premier Class, 3.62% (j) (Identified Cost, $2,478,908)

2,478,908

$2,478,908

Other Assets, Less Liabilities – 0.0%

100,828

Net Assets – 100.0%

$379,210,722

3


MFS Active Growth ETF

Portfolio of Investments (unaudited) – continued

(a)

Non-income producing security.

(j)

The rate quoted is the annualized seven-day yield of the fund at period end.

The following abbreviations are used in this report and are defined:

ADR

American Depositary Receipt

REIT

Real Estate Investment Trust

See Notes to Financial Statements

4


MFS Active Growth ETF

Financial Statements | Statement of Assets and Liabilities

This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund. 

At 8/31/26 (unaudited)

Assets

Investments in unaffiliated issuers, at value (identified cost, $332,719,813)

$379,109,894

Foreign currency, at value (identified cost, $7)

7

Receivables for

Interest and dividends

131,185

Other assets

1,934

Total assets

$379,243,020

Liabilities

Payable to custodian

$26

Payable to affiliates

Investment adviser

20,562

Accrued expenses and other liabilities

11,710

Total liabilities

$32,298

Net assets

$379,210,722

Net assets consist of

Paid-in capital

$340,484,455

Total distributable earnings (loss)

38,726,267

Net assets

$379,210,722

Shares of beneficial interest outstanding (unlimited number of shares authorized)

12,625,000

Net asset value per share (net assets of $379,210,722 / 12,625,000 shares of beneficial interest outstanding)

$30.04

See Notes to Financial Statements

5


MFS Active Growth ETF

Financial Statements | Statement of Operations

This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. 

Six months ended 8/31/26 (unaudited)

Net investment income (loss)

Income

Dividends from unaffiliated issuers

$1,008,225

Income on securities loaned

3,298

Other

1,587

Foreign taxes withheld

(14,338

)

Total investment income

$998,772

Expenses

Management fee

$783,529

Total expenses

$783,529

Net investment income (loss)

$215,243

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers

$(6,856,264

)

Foreign currency

(499

)

In-kind redemptions – unaffiliated issuers

5,868,261

Net realized gain (loss)

$(988,502

)

Change in unrealized appreciation or depreciation

Unaffiliated issuers

$31,216,280

Net realized and unrealized gain (loss)

$30,227,778

Change in net assets from operations

$30,443,021

See Notes to Financial Statements

6


MFS Active Growth ETF

Financial Statements |  Statements of Changes in Net Assets

These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. 

Six months ended

Year ended


8/31/26

(unaudited)


2/28/26

Change in net assets

From operations

Net investment income (loss)

$215,243

$95,872

Net realized gain (loss)

(988,502

)

(4,958,134

)

Net unrealized gain (loss)

31,216,280

16,272,973

Change in net assets from operations

$30,443,021

$11,410,711

Total distributions to shareholders

$—

$(126,553

)

Change in net assets from fund share transactions

$156,308,744

$138,730,003

Miscellaneous capital

$6,657

$(9,024

)

Total change in net assets

$186,758,422

$150,005,137

Net assets

At beginning of period

192,452,300

42,447,163

At end of period

$379,210,722

$192,452,300

See Notes to Financial Statements

7


MFS Active Growth ETF

Financial Statements | Financial Highlights

The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years (or life of the fund, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund (assuming reinvestment of all distributions) held for the entire period. 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25 (c)

Net asset value, beginning of period

$27.11

$24.61

$25.44

Income (loss) from investment operations

Net investment income (loss) (d)

$0.02

$0.02

$0.01

Net realized and unrealized gain (loss)

2.91

2.50

(0.84

)

Total from investment operations

$2.93

$2.52

$(0.83

)

Less distributions declared to shareholders

From net investment income

$—

$(0.02

)

$—

Miscellaneous capital

$0.00

(w)

$(0.00

)(w)

$—

Net asset value, end of period (x)

$30.04

$27.11

$24.61

Total return (%) (s)(x)

10.81

(n)

10.25

(3.28

)(n)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses

0.49

(a)

0.49

0.49

(a)

Net investment income (loss)

0.13

(a)

0.07

0.12

(a)

Portfolio turnover rate (e)

28

(n)

50

4

(n)

Net assets at end of period (000 omitted)

$379,211

$192,452

$42,447

(a)

Annualized.

(c)

For the period from the commencement of the fund’s investment operations, December 5, 2024, through the stated period end.

(d)

Per share data is based on average shares outstanding.

(e)

Portfolio turnover rate excludes securities received or delivered in-kind in the process of creating or redeeming fund shares.

(n)

Not annualized.

(s)

From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.

(w)

Per share amount was less than $0.01.

(x)

The net asset value and total return have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted

accounting principles required at period end for financial reporting purposes.

See Notes to Financial Statements

8


MFS Active Growth ETF

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS Active Growth ETF (the fund) is a non-diversified series of MFS Active Exchange Traded Funds Trust (the trust).  The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

(2) Significant Accounting Policies

General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued.

Segment Reporting — An operating segment is defined in FASB Accounting Standards Codification Topic 280, Segment Reporting as a component of a public entity that engages in business activities from which it may recognize revenues and incur expenses, has operating results that are regularly reviewed by the entity’s chief operating decision maker (CODM) in making resource allocation decisions and assessing segment performance, and for which discrete financial information is available. The fund represents a single operating segment and the Chairman’s Committee of the fund's adviser acts as the segment’s CODM. The fund’s total returns, expense ratios, and changes in net assets which are used by the CODM to assess segment performance and to make resource allocation decisions to the segment are consistent with that presented within the fund’s financial statements.

Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.

Investment Valuations — Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.

Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading

9


MFS Active Growth ETF

Notes to Financial Statements (unaudited) - continued 

does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of August 31, 2026 in valuing the fund's assets and liabilities:

Financial Instruments

Level 1

Level 2

Level 3

Total

Equity Securities

$376,630,986

$—

$—

$376,630,986

Investment Companies

2,478,908

—

—

2,478,908

Total

$379,109,894

$—

$—

$379,109,894

For further information regarding security characteristics, see the Portfolio of Investments.

Foreign Currency Translation — Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions or on the reporting date for foreign denominated receivables and payables. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on receivables, payables, income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed.

Security Loans — Under its Securities Lending Agency Agreement with the fund, Goldman Sachs Agency Lending, as lending agent, loans the securities of the fund to certain qualified institutions (the “Borrowers”) approved by the fund. Security loans can be terminated at the discretion of either the lending agent or the fund and the related securities must be returned within the earlier of the standard trade settlement period for such securities or within five business days. The loans are collateralized by cash and/or U.S. government securities in an amount typically at least equal to the market value of the securities loaned. On loans collateralized by cash, the cash collateral is invested in a money market fund. The market value of the loaned securities is determined at the close of business of the fund and any additional required collateral is delivered to the fund on the next business day. The lending agent provides the fund with indemnification against Borrower default. In the event of Borrower default, the lending agent will, for the benefit of the fund, either purchase securities identical to those loaned or pay the fund the market value of the loaned securities. In return, the lending agent assumes the fund's rights to the related collateral. If the collateral value is less than the cost to purchase identical securities or the cash needed to pay their market value, the lending agent is responsible for the shortfall, but only to the extent that such shortfall is not due to a decline in collateral value resulting from collateral reinvestment for which the fund bears the risk of loss. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. government securities, a fee is received from the Borrower, and is allocated between the fund and the lending agent. Income from securities lending is separately reported in the Statement of Operations. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income. At August 31, 2026, there were no securities on loan or collateral outstanding.

Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.

10


MFS Active Growth ETF

Notes to Financial Statements (unaudited) - continued 

Investment Transactions and Income —  Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend payments received in additional securities are recorded on the ex-dividend date in an amount equal to the value of the security on such date.

The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.

Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.

Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for generally a three-year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.

Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.

Book/tax differences primarily relate to wash sale loss deferrals and redemptions in-kind.

The tax character of distributions declared to shareholders for the last fiscal year is as follows: 

Year ended

2/28/26

Ordinary income (including any short-term capital gains)

$126,553

The federal tax cost and the tax basis components of distributable earnings were as follows: 

As of 8/31/26

Cost of investments

$332,795,306

Gross appreciation

51,992,276

Gross depreciation

(5,677,688

)

Net unrealized appreciation (depreciation)

$46,314,588

As of 2/28/26

Capital loss carryforwards

(6,815,062

)

Net unrealized appreciation (depreciation)

15,098,308

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

As of February 28, 2026, the fund had capital loss carryforwards available to offset future realized gains. These net capital losses may be carried forward indefinitely and their character is retained as short-term and/or long-term losses. Such losses are characterized as follows: 

Short-Term

$(6,723,257

)

Long-Term

(91,805

)

Total

$(6,815,062

)

11


MFS Active Growth ETF

Notes to Financial Statements (unaudited) - continued 

(3) Transactions with Affiliates

Investment Adviser — The fund has an Investment Management Agreement (“Management Agreement”) with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.49% of the fund’s average daily net assets. Under the Management Agreement, MFS will pay substantially all the fund’s operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), litigation expenses, the cost of proxy solicitations and shareholder meetings, the fee paid to MFS pursuant to this agreement, and such other expenses as approved by a majority of the fund’s Board of Trustees.

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly owned subsidiary of MFS, is the distributor of shares of the fund. The fund has adopted a plan in accordance with Rule 12b-1 under the Investment Company Act of 1940, as amended (the Distribution Plan). The fund’s Board of Trustees has determined not to implement payments of Rule 12b-1 fees under the Distribution Plan at this time. The fund does not currently pay compensation to MFD for any distribution services provided.

Administrator — MFS provides certain financial, legal, and other administrative services to the fund. MFS bears the costs of the services under the Management Agreement.

Trustees’ and Officers’ Compensation — Under the Management Agreement, MFS pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. MFS also pays compensation to Trustees or officers of the fund who are also officers of the investment adviser for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS and MFD. The fund did not pay any compensation to the independent Trustees for the six months ended August 31, 2026.

Other — The adviser has voluntarily undertaken to reimburse the fund from its own resources on a quarterly basis for the cost of investment research embedded in the cost of the fund’s securities trades. This agreement may be rescinded at any time. For the six months ended August 31, 2026, this reimbursement amounted to $1,587, which is included in “Other” income in the Statement of Operations.

(4) Portfolio Securities

For the six months ended August 31, 2026, purchases and sales of investments, other than short-term obligations and in-kind transactions, aggregated $88,543,408 and $87,464,210, respectively. Securities received and delivered in-kind through subscriptions and redemptions aggregated $174,116,808 and $20,644,070, respectively.

(5) Purchase and Sales of Fund Shares

The fund issues and redeems shares through MFD at net asset value (“NAV”) only with Authorized Participants and only in large blocks of shares (each, a Creation Unit). An Authorized Participant may purchase or redeem a Creation Unit each business day that the fund is open in exchange for the delivery or receipt of a designated portfolio of in-kind securities and/or cash. Authorized Participants may pay a fixed purchase or redemption transaction fee to offset the transfer and other transaction costs associated with the issuance and redemption of Creation Units.  An additional variable fee may be charged for certain transactions. These variable fees are included in “Miscellaneous capital” in the Statement of Changes in Net Assets.

Individual fund shares may not be purchased or redeemed directly with the fund. Shares are listed for trading on the New York Stock Exchange, and individual fund shares may only be purchased and sold in the secondary market through a financial intermediary at market price. Because the fund’s shares will trade at market prices rather than NAV, shares may trade at prices greater than NAV (at a premium), at NAV, or less than NAV (at a discount). Transactions in fund shares were as follows: 

Six months ended

8/31/26

Year ended

2/28/26

Shares

Amount

Shares

Amount

Shares sold

6,375,000

$181,642,598

5,600,000

$144,941,412

Shares reacquired

(850,000

)

(25,333,854

)

(225,000

)

(6,211,409

)

Net change

5,525,000

$156,308,744

5,375,000

$138,730,003

12


ITEM 8. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active Growth ETF.

ITEM 9.  PROXY DISCLOSURES FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active Growth ETF.

ITEM 10. REMUNERATION PAID TO DIRECTORS, OFFICERS, AND OTHERS OF OPEN-END MANAGEMENT INVESTMENT COMPANIES.

This information is disclosed as part of the financial statements included in Item 7 above for MFS Active Growth ETF. See the Statement of Operations and Note 3 within the Notes to Financial Statements for more information.

ITEM 11. STATEMENT REGARDING BASIS FOR APPROVAL OF INVESTMENT ADVISORY CONTRACT.

13


MFS Active Growth ETF

Board Review of Investment Management Agreement

MFS Active Growth ETF

The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested (“independent”) Trustees, voting separately, annually approve the continuation of the Fund’s investment management agreement with MFS. The Trustees consider matters bearing on the Fund and its advisory arrangements at their meetings throughout the year, including a review of performance data at each regular meeting. In addition, the independent Trustees met several times over the course of several months beginning in April and ending in July, 2026 (“contract review meetings”) for the specific purpose of considering whether to approve the continuation of the investment management agreement for the Fund and the other investment companies that the Board oversees (the “MFS Funds”). The independent Trustees were assisted in their evaluation of the Fund’s investment management agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS during various contract review meetings. The independent Trustees were also assisted in this process by an independent consultant who was retained by and reported to the independent Trustees.

In connection with their deliberations regarding the continuation of the investment management agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant.  The investment management agreement for the Fund was considered separately, although the Trustees also took into account the common interests of all MFS Funds in their review. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services performed by MFS under the existing investment management agreement and other arrangements with the Fund. The independent Trustees considered that the Fund has a unitary management fee structure, pursuant to which MFS receives a fee covering investment management and administrative services, with MFS paying the Fund’s ordinary, recurring operating expenses (the “Unitary Fee”), subject to certain exceptions.

In connection with their contract review meetings, the Trustees received and relied upon materials that included, among other items: (i) information provided by Broadridge Financial Solutions, Inc. (“Broadridge”), an independent third party, on the investment performance of the Fund for the one-year period ended December 31, 2025 and the investment performance of a group of funds with substantially similar investment classifications/objectives (the “Broadridge performance universe”), (ii) information provided by Broadridge on the Fund’s Unitary Fee and the advisory fees and other expenses of comparable funds identified by Broadridge, as well as all other funds in the same investment classification/category (the “Broadridge expense group and universe”),  (iii) information provided by MFS on the advisory fees of portfolios of other clients of MFS, including institutional separate accounts, (iv) information regarding MFS’ financial results and financial condition, including MFS’ and certain of its affiliates’ estimated profitability from services performed for the Fund and the MFS Funds as a whole, and compared to MFS’ institutional business, (v) MFS’ views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vi) descriptions of various functions performed by MFS for the MFS Funds, such as compliance monitoring and portfolio trading practices, and (vii) information regarding the overall organization of MFS, including information about MFS’ senior management and other personnel providing investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative performance, fee and expense information prepared and provided by Broadridge was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS.

The Trustees’ conclusion as to the continuation of the investment management agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor.  Some of the factors that figured particularly in the Trustees’ deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors.  It is also important to recognize that the fee arrangements for the Fund and other MFS Funds are the result of years of review and discussion between the independent Trustees and MFS, that certain aspects of such arrangements may receive greater scrutiny in some years than in others, and that the Trustees’ conclusions may be based, in part, on their consideration of these same arrangements during the course of the year and in prior years.

Based on information provided by Broadridge and MFS, the Trustees reviewed the Fund’s total return investment performance as well as the Broadridge performance universe over the one-year period ended December 31, 2025. The total return performance of the Fund was in the 4th quintile relative to the other funds in the universe for this one-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers). The Fund commenced operations on December 5, 2024, and has a limited operating history and performance record; therefore, no performance data for the three- or five-year periods was available.  Because of the passage of time, these performance results may differ from the performance results for more recent periods, including those shown elsewhere in this report.

14


MFS Active Growth ETF

Board Review of Investment Management Agreement - continued

In the course of their deliberations, the Trustees took into account information provided by MFS in connection with the contract review meetings as well as during investment review meetings conducted with portfolio management personnel during the course of the year regarding the Fund’s performance. After reviewing these and related factors, the Trustees concluded, within the context of their overall conclusions regarding the investment management agreement, that they were satisfied with MFS’ responses and efforts relating to investment performance.

In assessing the reasonableness of the Fund’s Unitary Fee, the Trustees considered, among other things, information on unitary fee structures generally, as well as the terms of the investment management agreement and descriptions of various services performed or procured by MFS under the investment management agreement, including portfolio management and portfolio trading practices and administrative services. The Trustees considered the categories of expenses excluded from the Unitary Fee and therefore payable by the Fund. The Trustees also considered the Fund’s Unitary Fee as compared with the advisory fee and total expense ratios of the Broadridge expense group based on information provided by Broadridge. The Trustees considered that, according to the data provided by Broadridge, the Fund’s Unitary Fee and total expense ratio were each lower than the applicable Broadridge expense group median.

The Trustees also considered the advisory fees charged by MFS to any institutional separate accounts advised by MFS (“separate accounts”) and unaffiliated investment companies for which MFS serves as subadviser (“subadvised funds”) that have comparable investment strategies to the Fund, if any.  In comparing these fees, the Trustees considered information provided by MFS as to the generally broader scope of services provided by MFS to the Fund, as well as the more extensive regulatory burdens imposed on MFS in managing the Fund, in comparison to separate accounts and subadvised funds.  The Trustees also considered the higher demands placed on MFS’ investment personnel and trading infrastructure as a result of the daily cash in-flows and out-flows of the Fund in comparison to separate accounts.

The Trustees considered that the investment management agreement provides for a unitary fee level that does not include pre-established breakpoints, and considered MFS’ observation that while fee waivers, breakpoints, and expense caps are common for mutual funds, these arrangements are not typically used by ETFs.

The Trustees also considered information prepared by MFS relating to MFS’ costs and profits with respect to the Fund, the MFS Funds considered as a group, and other investment companies and accounts advised by MFS, as well as MFS’ methodologies used to determine and allocate its costs to the MFS Funds, the Fund, and other accounts and products for purposes of estimating profitability.

After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the investment management agreement, that the Unitary Fee charged to the Fund represents reasonable compensation in light of the services being provided by MFS to the Fund.

In addition, the Trustees considered MFS’ resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund.  The Trustees also considered current and developing conditions in the financial services industry, including the presence of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies.  In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc.  The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser that also serves other investment companies as well as other accounts.

The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services provided to the Fund by MFS and its affiliates under agreements and plans other than the investment management agreement. The Trustees also considered the nature, extent and quality of certain other services MFS may perform or arrange for on the Fund’s behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS’ interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services provided by MFS and its affiliates on behalf of the Fund were satisfactory.

The Trustees considered so-called “fall-out benefits” to MFS such as reputational value derived from serving as investment manager to the MFS Funds. The Trustees also considered that MFS discontinued its historic practice of obtaining investment research from portfolio brokerage commissions paid by certain MFS Funds effective January 2018, and directly pays or voluntarily reimburses a Fund, if applicable, for the costs of external research acquired through the use of the Fund’s portfolio brokerage commissions.

Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including the independent Trustees, concluded that the Fund’s investment management agreement with MFS should be continued for an additional one-year period, commencing August 1, 2026.

15


MFS Active Intermediate Muni Bond ETF

ITEM 7.  FINANCIAL STATEMENTS AND FINANCIAL HIGHLIGHTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

MFS Active Intermediate Muni Bond ETF

Portfolio of Investments − 8/31/26 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by jurisdiction.

Issuer

Shares/Par

Value ($)

Municipal Bonds – 98.1%

Alabama – 5.3%

Alabama Energy Southeast Cooperative District, Energy Supply Rev., “B”, 5%, 9/01/2033

$

250,000

$253,760

Alabama Energy Southeast Cooperative District, Energy Supply Rev., “B”, 5%, 11/01/2033

100,000

104,846

Alabama Energy Southeast Cooperative District, Energy Supply Rev., “C”, 5%, 5/01/2055 (Put Date 2/01/2031)

5,000

5,255

Baldwin County, AL, Industrial Development Authority, Solid Waste Disposal Rev. (Novelis Corp. Project), “A”, 5%,

6/01/2055 (Put Date 6/01/2032)

100,000

102,524

Baldwin County, AL, Industrial Development Authority, Solid Waste Disposal Rev. (Novelis Corp. Project), “A”, 4.3%,

3/01/2056 (Put Date 3/01/2033)

100,000

98,623

Black Belt Energy Gas District, AL, Gas Project Rev. (Project No. 8), “A”, 4%, 12/01/2052 (Put Date 12/01/2029)

165,000

164,630

Black Belt Energy Gas District, AL, Gas Project Rev., “A”, 5%, 12/01/2034

390,000

404,560

Black Belt Energy Gas District, AL, Gas Project Rev., “A”, 5.25%, 5/01/2056 (Put Date 5/01/2032)

110,000

110,819

Black Belt Energy Gas District, AL, Gas Project Rev., “B”, 5%, 12/01/2034

100,000

105,594

Black Belt Energy Gas District, AL, Gas Project Rev., “C”, 5.25%, 6/01/2036

310,000

328,080

Black Belt Energy Gas District, AL, Gas Project Rev., “E”, 5%, 7/01/2033

275,000

285,991

Black Belt Energy Gas District, AL, Gas Project Rev., “I”, 5%, 10/01/2033

415,000

435,163

Black Belt Energy Gas District, AL, Gas Project Rev., “I”, 5%, 6/01/2036

500,000

513,988

Black Belt Energy Gas District, AL, Gas Project Rev., “B”, 5%, 12/01/2033

425,000

446,627

Black Belt Energy Gas District, AL, Gas Project Rev., “B”, 5%, 10/01/2055 (Put Date 9/01/2032)

250,000

260,075

Black Belt Energy Gas District, AL, Gas Project Rev., “D”, 5%, 3/01/2055 (Put Date 11/01/2034)

250,000

260,141

Black Belt Energy Gas District, AL, Gas Project Rev., “F”, 5%, 12/01/2034

150,000

156,125

Black Belt Energy Gas District, AL, Gas Project Rev., “F”, 5%, 12/01/2035

190,000

197,767

Coffee County, AL, Board of Education Special Tax School Warrants, AGM, 5%, 2/01/2042

500,000

518,113

Jacksonville, AL, Public Educational Building Authority, Higher Education Facilities Rev. (Jacksonville State University Foundation),

“A”, BAM, 5.125%, 8/01/2044

250,000

257,220

Lower Alabama Gas District, Gas Project Rev., “A”, 5%, 9/01/2034

210,000

217,947

Southeast Alabama Energy Authority, “A”, 5%, 11/01/2035

250,000

254,326

$5,482,174

Alaska – 1.0%

Alaska Municipal Bond Bank Authority, General Obligation & Refunding, “2”, 5%, 12/01/2028

$

260,000

$270,629

Alaska Railroad Corp., Cruise Port Rev., AGM, 5.5%, 10/01/2039

200,000

217,843

Anchorage, AK, Port Rev., “A”, AGM, 5.25%, 2/01/2039

500,000

535,438

$1,023,910

Arizona – 1.8%

Arizona Industrial Development Authority, Education Rev. (Academies of Math & Science Projects), “A”, 5%, 7/01/2036

$

250,000

$253,708

Arizona Industrial Development Authority, Multi-Family Housing Refunding Rev. (Southgate-Canterbury House Project), 4.05%,

8/01/2036

250,000

241,387

Arizona Industrial Development Authority, National Charter School Revolving Loan Fund Rev. (Equitable School Revolving

Fund LLC), “A”, 5%, 11/01/2037

135,000

142,438

Arizona Industrial Development Authority, National Charter School Revolving Loan Fund Rev. (Equitable School Revolving

Fund LLC), “A”, 5%, 11/01/2038

190,000

193,589

Arizona Industrial Development Authority, National Charter School Revolving Loan Fund Rev. (Equitable School Revolving

Fund LLC), “A”, 5%, 11/01/2039

175,000

181,639

Arizona Industrial Development Authority, Student Housing Rev. (Provident Group - NCCU Properties LLC - North Carolina Central

University Project), “A”, BAM, 5%, 6/01/2049

250,000

251,154

Maricopa County, AZ, Industrial Development Authority, Single Family Mortgage Rev., “A”, 4.15%, 9/01/2040

245,000

232,396

Phoenix, AZ, Industrial Development Authority, Solid Waste Disposal Rev. (Republic Services, Inc. Project), VRDN, 3%,

12/01/2035 (Put Date 11/02/2026)

100,000

99,953

EMUFS-SEM

1


MFS Active Intermediate Muni Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Municipal Bonds – continued

Arizona – continued

Pima County, AZ, Industrial Development Authority, Single Family Mortgage Rev., “A”, GNMA, 6%, 7/01/2055

$

240,000

$260,603

$1,856,867

Arkansas – 0.9%

Arkansas Development Finance Authority, Hospital Rev. (Washington Regional Medical Center), “C”, 5%, 2/01/2035

$

415,000

$414,964

Arkansas Development Finance Authority, Resource Recovery Rev. (Weyerhaeuser Co. Project), 3.875%,

10/15/2065 (Put Date 10/15/2032)

100,000

99,192

Arkansas Development Finance Authority, Single Family Mortgage Rev. (Mortgage-Backed Securities/Mortgage Loans Program),

“B”, GNMA, 2.875%, 7/01/2057 (Put Date 5/15/2027)

100,000

99,936

Trustees of the University of Central Arkansas, Student Fee Rev., “A”, BAM, 4%, 11/01/2038

350,000

344,157

$958,249

California – 5.0%

Burbank, Glendale & Pasadena, CA, Airport Authority Senior Rev., “B”, 5%, 7/01/2037

$

275,000

$299,218

California Community Choice Financing Authority, Clean Energy Project Rev. (Green Bonds), “B”, 5%, 3/01/2036

155,000

159,118

California Community Choice Financing Authority, Clean Energy Project Rev. (Green Bonds), “C”, 5.25%, 2/01/2036

100,000

106,164

California Community Choice Financing Authority, Clean Energy Project Rev. (Green Bonds), “C”, 5%,

12/01/2055 (Put Date 10/01/2033)

700,000

725,195

California Community Choice Financing Authority, Clean Energy Project Rev. (Green Bonds), “D”, 5%,

2/01/2055 (Put Date 9/01/2032)

250,000

267,210

California Community Choice Financing Authority, Clean Energy Project Rev. (Green Bonds), “E”, 5%, 7/01/2035

100,000

107,189

California Community Choice Financing Authority, Clean Energy Project Rev. (Green Bonds), “E”, 5%,

10/01/2056 (Put Date 5/01/2035)

250,000

263,172

California Community Choice Financing Authority, Clean Energy Project Rev. (Green Bonds), “F”, 5%, 6/01/2036

180,000

192,317

California Community Choice Financing Authority, Clean Energy Project Rev. (Green Bonds), “F”, 5%,

2/01/2055 (Put Date 11/01/2032)

500,000

525,876

California Community Choice Financing Authority, Clean Energy Project Rev. (Green Bonds), “G”, 5%, 10/01/2034

205,000

216,523

California Community Choice Financing Authority, Clean Energy Project Rev. (Green Bonds), “H”, 5%,

1/01/2056 (Put Date 8/01/2033)

245,000

261,566

California Housing Finance Agency Municipal Certificates, “A”, 4.375%, 9/20/2036

241,737

240,372

California Municipal Finance Authority Refunding Rev. (California Baptist University), “A”, 5%, 11/01/2035

250,000

259,706

California Municipal Finance Authority, COP (Palomar Health), “A”, AGM, 5%, 11/01/2033

170,000

176,043

California Statewide Communities Development Authority, Infrastructure Program Rev., “C-2”, 5%, 9/02/2028

85,000

87,932

California Statewide Communities Development Authority, Infrastructure Program Rev., “C-2”, 5%, 9/02/2029

100,000

104,549

Central Valley, CA, Energy Authority, Commodity Supply Rev., 5%, 12/01/2055 (Put Date 8/01/2035)

100,000

105,495

Los Angeles, CA, Department of Airports Rev. (Los Angeles International), “A”, 5.25%, 5/15/2038

350,000

357,240

San Bernardino County, CA, Housing Authority General Rev. (Valencia Grove II Apartments), “A”, 4.125%, 7/01/2036

500,000

500,551

Santa Barbara County, CA, Lompoc Valley Medical Center Rev., 5%, 2/01/2034

195,000

200,538

$5,155,974

Colorado – 5.1%

Adams & Arapahoe Counties, CO, Joint School District No. 28J, Certificates of Participation, BAM, 5.25%, 12/01/2043

$

110,000

$116,432

Adams County, CO, Bromley Park Metropolitan District No. 3, General Obligation, AGM, 5%, 12/01/2039

225,000

237,990

Arapahoe County, CO, Cherry Creek School District No. 5, General Obligation, 5.25%, 12/15/2042

500,000

540,046

Bennett, CO, Wastewater Rev., AGM, 5%, 12/01/2044

250,000

257,767

Boulder County, CO, STC Metropolitan District No. 2, General Obligation & First Lien Special Refunding Rev., “A-1”, AGM, 5%,

12/01/2036

215,000

228,093

Colorado Educational & Cultural Facilities Authority, Charter School Rev. (Stargate Charter School Project), “A”, 5.25%, 12/01/2045

100,000

100,827

Colorado Health Facilities Authority Refunding Rev. (Frasier Meadows Manor), “A”, 5%, 5/15/2040

100,000

102,100

Colorado Health Facilities Authority Rev. (Covenant Living Communities & Services), “A”, 5%, 12/01/2035

245,000

262,047

Colorado Housing Catalyst General Credit Enhanced, Multi-Family Housing Rev. (Village on Eastbrook Apartments Project), “A”, 5%,

5/01/2044

275,000

274,704

Denver, CO, City & County Board of Water Commissioners, Water Rev., “A”, 5%, 9/15/2047

210,000

211,899

Denver, CO, City & County Housing Authority, Multi-Family Housing Rev. (4965 Washington Street Project), “A”, 5%, 12/01/2045

10,000

9,985

2


MFS Active Intermediate Muni Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Municipal Bonds – continued

Colorado – continued

Denver, CO, Department of Aviation Airport System Rev., “A”, 5%, 11/15/2029

$

110,000

$112,375

Denver, CO, International Metropolitan District No. 14, Limited Tax Obligation, General Obligation Refunding and Improvement, “A”,

AGM, 5%, 12/01/2036

500,000

527,276

Douglas County, CO, Lanterns Metropolitan District No. 1, Limited Tax General Obligation Refunding & Improvement, AGM, 5%,

12/01/2034

250,000

262,920

Douglas County, CO, Mirabelle Metropolitan District No. 2, Limited Tax General Obligation Refunding, “A”, AGM, 5%, 12/01/2040

105,000

107,914

Grand River, CO, Hospital District, Garfield & Mesa Counties, General Obligation, AGM, 6%, 12/01/2043

250,000

280,127

Jefferson County, CO, City of Arvada, Jefferson Center Metropolitan District No. 2, Special Refunding Rev., “A”, 5%, 12/01/2036

100,000

98,419

Larimer County, CO, Berthoud-Heritage Metropolitan District No. 1, Limited Tax General Obligation Refunding, AGM, 5%,

12/01/2038

135,000

139,773

Larimer County, CO, Berthoud-Heritage Metropolitan District No. 1, Limited Tax General Obligation Refunding, AGM, 5%,

12/01/2039

125,000

128,014

Lone Tree, CO, Rampart Range Metropolitan District No. 1, Limited Tax Supported & Special Rev., AGM, 5%, 12/01/2044

300,000

306,736

Montrose, CO, Sewer Utility Rev., BAM, 5%, 12/01/2044

300,000

313,000

Park Creek Metropolitan District, CO, Senior Limited Property Tax Supported Improvement & Refunding Rev., AGM, 5%, 12/01/2044

300,000

309,174

Routt County, CO, Airport Rev. (Yampa Valley Regional Airport), 5.25%, 6/01/2044

220,000

225,034

Weld County, CO, Greeley City Center West Residential Metropolitan District No. 2, General Obligation Refunding Rev., AGM, 5.5%,

12/01/2045

100,000

105,129

$5,257,781

Connecticut – 1.2%

Connecticut Aquarion Water Authority, Subordinate Water System Rev., “D”, 5.25%, 8/01/2039

$

100,000

$109,168

Connecticut Health & Educational Facilities Authority Rev. (Fairfield University Issue), “W”, 5%, 7/01/2044

500,000

522,086

Connecticut Higher Education Supplemental Loan Authority, State Supported Rev. (CHESLA Loan Program), “B”, 5%, 11/15/2036

100,000

104,132

Connecticut Higher Education Supplemental Loan Authority, State Supported Rev. (CHESLA Loan Program), “B-1”, 5.25%,

11/15/2034

250,000

266,717

Connecticut State Health & Educational Facilities Authority Rev. (Fairview Issue), 4.4%, 12/15/2031

190,000

190,804

Stamford, CT, Housing Authority Rev. (Mozaic Concierge Living Project), “D”, 4.25%, 10/01/2030

100,000

100,709

$1,293,616

Delaware – 0.2%

Delaware Housing Authority, Senior Single Family Rev., “A”, GNMA, 5.75%, 1/01/2055

$

215,000

$230,481

District of Columbia – 0.5%

District of Columbia, Housing Finance Agency, Collateralized Multi-Family Housing Mortgage Rev. (Belmont Crossing Phase II), 5%,

3/01/2029 (Put Date 2/01/2028)

$

100,000

$102,558

District of Columbia, Housing Finance Agency, Multi-Family Housing Rev. (2911 Rhode Island Avenue Apartments Project), “A”, FHA,

5%, 3/01/2028

250,000

256,870

Metropolitan Washington, D.C., Airports Authority, System Refunding Rev., “A”, 5%, 10/01/2036

115,000

117,861

$477,289

Florida – 5.2%

Brevard County, FL, Health Facilities Authority, Hospital Rev. (Health First Obligated Group), “A”, 5%, 7/01/2036

$

500,000

$541,624

Charlotte County, FL, Industrial Development Authority, Utility System Rev. (Town & Country Utilities Project), 5.125%, 10/01/2035

100,000

100,750

Daytona Beach, FL, Halifax Hospital Medical Center Rev., 5%, 6/01/2036

125,000

125,503

Florida Capital Trust Authority, Educational Facilities Rev. (Madrone - Florida Tech Student Housing I LLC-Florida Institute of

Technology Project), “A”, 4.75%, 7/01/2040

100,000

95,905

Florida Development Finance Corp. Rev. (Brightline Florida Passenger Rail Project), AGM, 5%, 7/01/2044

175,000

171,975

Florida Development Finance Corp., Educational Facilities Rev. (Renaissance Charter School, Inc. Projects), “A”, 4.9%, 6/15/2035

250,000

252,939

Florida Higher Educational Facilities Financing Authority Rev. (Nova Southeastern University Project), 5%, 4/01/2036

105,000

105,060

Florida Housing Finance Corp., Multi-Family Mortgage Rev. (The Enclave at Canopy Park), “I”, 3.3%,

7/01/2058 (Put Date 1/01/2028)

250,000

250,412

Florida Local Government Finance Commission, Senior Living Rev. (Fleet Landing at Nocatee Project), “B-2”, 4.45%, 11/15/2031

200,000

200,796

3


MFS Active Intermediate Muni Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Municipal Bonds – continued

Florida – continued

Florida Pompano Beach Rev. (John Knox Village Project), 5%, 9/01/2039

$

150,000

$150,029

Greater Orlando, FL, Aviation Authority, Airport Facilities Rev., 5.25%, 10/01/2042

250,000

261,892

Hillsborough County, FL, Aviation Authority, Tampa International Airport Rev., “A”, 5%, 10/01/2035

180,000

189,369

Lee County, FL, Airport Rev., “A-1”, 5.25%, 10/01/2044

150,000

155,823

Lee County, FL, Airport Rev., “B”, 4%, 10/01/2038

250,000

237,384

Lee County, FL, Industrial Development Authority, Healthcare Facilities Rev. (Shell Point Obligated Group), “C”, 5%, 11/15/2044

200,000

202,710

Miami Beach, FL, Health Facilities Authority, Hospital Refunding Rev. (Mount Sinai Medical Center of Florida), “A”, 5%, 11/15/2039

500,000

525,878

Miami-Dade County, FL, Industrial Development Authority, Educational Facilities Rev. (Mater Academy Projects), 5%, 6/15/2041

110,000

110,615

Miami-Dade County, FL, Seaport Refunding Rev., “A”, 5%, 10/01/2036

250,000

262,836

Orlando, FL, Community Development Agency, Tax Increment Rev., “A”, BAM, 5%, 9/01/2032

500,000

537,631

Pasco County, FL, Solid Waste Disposal & Resource Recovery System Rev., “A”, 5%, 10/01/2038

665,000

701,807

Pensacola, FL, Airport Rev., 5.25%, 10/01/2043

200,000

208,995

$5,389,933

Georgia – 3.5%

Atlanta, GA, Airport General Rev. (Green Bonds), “B-1”, 5.25%, 7/01/2039

$

500,000

$537,206

Atlanta, GA, Urban Residential Finance Authority, Multi-Family Housing Rev. (North Block), 3.4%, 2/01/2029 (Put Date 2/01/2028)

100,000

100,345

Cobb County, GA, Development Authority, Student Housing Junior Subordinate Refunding Rev. (KSU Housing Real Estate

Foundations Projects), “C”, 5%, 6/15/2037

110,000

114,268

Commerce, GA, School District General Obligation, 6%, 8/01/2043

250,000

283,169

DeKalb County, GA, Housing Authority, Affordable Multi-Family Housing Refunding Rev. (The Avenues of North Decatur), 4.125%,

12/01/2034

120,000

117,302

Fulton County, GA, Development Authority Rev. (Georgia Tech Facilities, Inc.), 5%, 6/15/2044

430,000

439,010

Georgia Main Street Energy, Inc., Energy Project Rev., “A”, 5%, 10/01/2033

155,000

162,725

Georgia Main Street Energy, Inc., Energy Project Rev., “D”, 5%, 12/01/2033

250,000

261,607

Georgia Main Street Natural Gas, Inc., Gas Supply Rev., “A”, 5%, 5/01/2054 (Put Date 9/01/2031)

210,000

221,611

Georgia Main Street Natural Gas, Inc., Gas Supply Rev., “A”, 5%, 6/01/2055 (Put Date 6/01/2032)

345,000

365,147

Georgia Main Street Natural Gas, Inc., Gas Supply Rev., “E”, 5%, 5/01/2055 (Put Date 12/01/2032)

250,000

260,845

Paulding County, GA, Hospital Authority Rev. (Wellstar Health System, Inc.), “A”, 5%, 4/01/2036

500,000

550,745

Savannah, GA, Convention Center Authority Rev. (Convention Center Hotel First Tier), “A”, 5.25%, 6/01/2040

100,000

102,826

Savannah, GA, Convention Center Authority Rev. (Convention Center Hotel Second Tier), “B”, 5.5%, 6/01/2040

135,000

131,575

$3,648,381

Hawaii – 0.4%

Hawaii Airports System Rev., “C”, 5%, 7/01/2043

$

200,000

$206,517

Hawaii Harbor System Rev., “A”, 4%, 7/01/2036

215,000

210,911

$417,428

Idaho – 0.1%

Idaho Health Facilities Authority Rev. (St. Luke's Health System Project), “C”, 5%, 3/01/2060 (Put Date 3/01/2035)

$

70,000

$75,483

Illinois – 5.4%

Chicago, IL, Board of Education, Dedicated Capital Improvement, 5.25%, 4/01/2033

$

100,000

$108,909

Chicago, IL, Board of Education, Unlimited Tax General Obligation Refunding Dedicated Rev., “B”, 7%, 12/01/2042 (n)

250,000

254,579

Chicago, IL, General Obligation, “A”, 5%, 1/01/2028

130,000

132,186

Chicago, IL, General Obligation, “A”, 5%, 1/01/2041

100,000

96,014

Chicago, IL, Midway Airport Refunding Rev., “A”, 5%, 1/01/2028

250,000

256,361

Cook County, IL, Community College District No. 152 1/2 (Hazel Crest), AGM, 5%, 12/01/2036

300,000

321,565

Illinois Finance Authority Rev. (Springfield Sustainable Energy Partners), 5%, 4/01/2039

500,000

525,221

Illinois Finance Authority Rev. (The Moorings of Arlington Heights), “A”, 5%, 11/01/2036

125,000

130,972

Illinois Finance Authority Rev. (University of Chicago), “A”, 5.25%, 4/01/2043

100,000

105,152

Illinois Finance Authority, Graduate & Professional Student Loan Program Rev. (Midwestern University Foundation), “A”, 5%,

7/01/2035

365,000

386,065

4


MFS Active Intermediate Muni Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Municipal Bonds – continued

Illinois – continued

Illinois Finance Authority, Graduate & Professional Student Loan Program Rev. (Midwestern University Foundation), “A”, 4.25%,

7/01/2041

$

100,000

$94,921

Illinois Finance Authority, Student Housing & Academic Facility Rev. (CHF-Chicago LLC-University of Illinois at Chicago Project), “A”,

5%, 2/15/2037

200,000

198,512

Illinois Finance Authority, Surface Freight Transfer Facilities Rev. (Centerpoint Joliet Terminal Railroad Project), 4.8%,

12/01/2043 (Put Date 7/02/2035)

200,000

203,527

Illinois Sales Tax Securitization Corp., “A”, 5%, 1/01/2044

270,000

272,707

Illinois State Toll Highway Authority, Senior Rev., “A”, 5.25%, 1/01/2045

150,000

157,276

Lake County, IL, Mundelein Park & Recreation District, General Obligation Park (Alternate Rev. Source), “B”, 5%, 3/01/2039

205,000

216,329

Northeastern, IL, Board of Trustees, University Certificates of Participation (Capital Improvement Projects), BAM, 5.25%, 7/01/2037

100,000

105,628

Paris, IL, Union School District No. 95, General Obligation, AGM, 5%, 11/01/2045

250,000

255,138

Richland, Wayne, Jasper, Clay and Lawrence Counties, IL, Community Unit School District No. 1, General Obligation, BAM, 5%,

12/01/2038

670,000

709,947

St. Clair County, IL, Community Unit School District No. 187, General Obligation School, “A”, AGM, 5%, 1/01/2040

395,000

413,739

State of Illinois, General Obligation, 5.5%, 5/01/2039

250,000

261,441

Tazewell County, IL, School District No. 52, General Obligation, BAM, 6.5%, 12/01/2042

100,000

113,399

Trustees of the University of Illinois, Housing and Auxiliary Facilities System Rev., “A”, BAM, 5%, 4/01/2039

310,000

317,422

$5,637,010

Indiana – 2.5%

Clark County, IN, Greater Clark Building Corp., Ad Valorem Property Tax First Mortgage, “B”, 5%, 7/15/2037 (w)

$

500,000

$537,494

Gary/Chicago, IN, International Airport Authority, Development Zone Rev., AGM, 5.25%, 2/01/2042

100,000

105,600

Indiana Finance Authority Rev. (Greenwood Village South Project), “C-2”, 3.75%, 5/15/2032

100,000

100,006

Indiana Finance Authority Rev. (Marquette Project), “A”, 5%, 3/01/2036

120,000

127,616

Indiana Finance Authority, Educational Facilities Rev. (DePauw University Project), 5%, 10/01/2041

255,000

257,757

Indiana Finance Authority, Educational Facilities Rev. (Marian University Project), 5%, 9/15/2036

250,000

258,374

Indiana Finance Authority, Senior Living Rev. (Indiana Masonic Home Project), “A”, 4.3%, 5/01/2029

65,000

65,890

Indiana Secondary Market for Education Loans, Inc., Student Loan Program Rev., “1A”, 4%, 6/01/2046

100,000

91,302

Lawrence County, IN, North Lawrence Community School Buildings Corp., Ad Valorem Property Tax First Mortgage, 5%, 7/15/2038

100,000

106,344

Madison, IN, Consolidated School Building Corp., Ad Valorem Property Tax First Mortgage, 5%, 7/15/2038

500,000

534,531

Westfield Washington, IN, Multi-School Building Corp. (Hamilton County), “A”, BAM, 5.25%, 7/15/2043

250,000

263,536

Whiting, IN, Environmental Facilities Refunding Rev. (BP Products North America, Inc. Project), 4%,

12/01/2044 (Put Date 6/10/2033)

100,000

99,628

$2,548,078

Iowa – 0.6%

Iowa Student Loan Liquidity Corp. Rev., “B”, 5%, 12/01/2033

$

250,000

$268,937

Iowa Student Loan Liquidity Corp. Rev., “B”, 5%, 12/01/2035

280,000

299,030

PEFA, Inc., Iowa Gas Project Rev., “A”, 5%, 4/01/2035

100,000

104,562

$672,529

Kansas – 0.9%

Garden City, KS, Sales Tax Special Obligation Rev. (Sports of the World Star Bond Project-Phase II), 4.25%, 6/01/2033

$

100,000

$99,723

Miami County, KS, Osawatomie Unified School District No. 367, General Obligation, BAM, 5.25%, 9/01/2042

300,000

310,295

Sedgwick County, KS, Unified School District No. 263, General Obligation School Building, “A”, AGM, 5%, 9/01/2039

500,000

527,158

$937,176

Kentucky – 1.2%

Carroll, KY, Environmental Facilities Rev. (Kentucky Utilities Co. Project), “A”, 4.25%, 10/01/2034

$

100,000

$99,449

Kentucky Bond Development Corp., Hospital Rev. (Baptist Healthcare System Obligated Group), “A”, AGM, 5%,

8/15/2055 (Put Date 8/15/2035)

500,000

547,237

Kentucky Economic Development Finance Authority Rev. (CommonSpirit Health), “A-2”, 5%, 8/01/2032

125,000

130,005

Kentucky Economic Development Finance Authority Rev. (CommonSpirit Health), “A-2”, 5%, 8/01/2035

125,000

128,778

5


MFS Active Intermediate Muni Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Municipal Bonds – continued

Kentucky – continued

Kentucky Public Energy Authority, Gas Supply Rev., “B”, 5%, 12/01/2033

$

370,000

$376,086

$1,281,555

Louisiana – 2.4%

Juban Crossing, LA, Economic Development District Refunding Rev. (General Infrastructure Projects), “C”, 5%, 9/15/2036

$

250,000

$264,732

Louisiana Board of Supervisors of State University & Agriculture & Mechanical College, Auxiliary Refunding Rev., BAM, 5%,

7/01/2035

250,000

276,648

Louisiana Local Government, Environmental Facilities & Community Development Authority Rev. (Calcasieu Parish School Project),

BAM, 5%, 12/01/2039

250,000

261,096

New Orleans, LA, Aviation Board General Airport Rev. (North Terminal Project), “B”, 5%, 1/01/2036

355,000

356,105

New Orleans, LA, Public Improvement, “A”, 5%, 12/01/2034

250,000

268,108

Ruston, LA, Sales Tax Rev., AGM, 5%, 6/01/2036

500,000

540,131

St. Tammany Parish, LA, Hospital Service District No. 1, Hospital Rev., “A”, 5%, 7/01/2056 (Put Date 7/01/2036)

500,000

544,618

$2,511,438

Maine – 0.6%

Maine Finance Authority, Solid Waste Disposal Rev. (Casella Waste Systems, Inc. Project), 4.625%, 12/01/2047 (Put Date 6/01/2035)

$

100,000

$101,717

Maine Finance Authority, Solid Waste Disposal Rev. (Casella Waste Systems, Inc. Project), “R-3”, 5%, 8/01/2035

100,000

103,990

Maine Finance Authority, Student Loan Rev. (Supplemental Education Loan Program), “A-1”, AGM, 5%, 12/01/2037

70,000

70,753

Maine Health & Higher Educational Facilities Authority Rev. (University of New England), “B”, 4%, 7/01/2037

300,000

293,803

$570,263

Maryland – 0.7%

Maryland Economic Development Corp., Senior Student Housing Rev. (Morgan State University O'Connell Project), “A”, AGM, 5%,

7/01/2039

$

350,000

$368,345

Maryland Health & Higher Educational Facilities Authority Rev. (Kennedy Krieger Institute, Inc.), “A”, 5.25%, 7/01/2044

100,000

102,411

Maryland Health & Higher Educational Facilities Authority Rev. (Maryland Institute College of Art), 4%, 6/01/2042

210,000

171,508

Maryland Health & Higher Educational Facilities Authority Rev. (TidalHealth, Inc.), “C”, AGM, 5%, 7/01/2042

100,000

103,872

$746,136

Massachusetts – 2.6%

Massachusetts Development Finance Agency Refunding Rev. (Lasell Village, Inc.), 5%, 7/01/2034

$

195,000

$210,038

Massachusetts Development Finance Agency Refunding Rev. (Mass General Brigham), “A”, 5%, 7/01/2041

250,000

264,449

Massachusetts Development Finance Agency Refunding Rev. (Suffolk University), “A”, 5%, 7/01/2036

500,000

500,547

Massachusetts Development Finance Agency Rev. (Boston Medical Center), “D”, 5%, 7/01/2044

235,000

230,670

Massachusetts Development Finance Agency Rev. (Dana-Farber Cancer Institute), “Q”, 5%, 12/01/2039

370,000

394,834

Massachusetts Development Finance Agency Rev. (Middlesex Sustainable Energy Partners), “A”, 5.5%, 10/01/2039

250,000

268,385

Massachusetts Development Finance Agency Rev. (Newbridge on the Charles, Inc.), 5%, 10/01/2037 (n)

125,000

125,934

Massachusetts Development Finance Agency Rev. (UMass Memorial Health Care Obligated Group), “I”, 5%, 7/01/2041

165,000

165,014

Massachusetts Development Finance Agency Rev. (Wentworth Institute of Technology), 5%, 10/01/2046

125,000

116,043

Massachusetts Educational Financing Authority, Education Loan Rev., “B”, 5%, 7/01/2029

300,000

315,665

Massachusetts Port Authority Rev., “A”, 5%, 7/01/2039

105,000

107,208

$2,698,787

Michigan – 2.1%

Ionia, MI, Public Schools, General Obligation Unlimited Tax Building Site Bonds, “I”, 5%, 5/01/2044

$

500,000

$521,213

Kent County, MI, Wyoming Public Schools, Unlimited Tax General Obligation Building & Site Bonds, BAM, 5%, 5/01/2040

250,000

268,507

Michigan Strategic Fund, Limited Obligation Rev. (I-75 Improvement Project), 5%, 12/31/2043

500,000

500,777

Michigan Strategic Fund, Limited Obligation Tax Capture Rev. (Bedrock Detroit-Transformational Brownfield Plan Project), 4.25%,

10/01/2036

100,000

99,778

Oakland, Washtenaw, & Livingston Counties, MI, South Lyon Community Schools, School Building & Site Bonds (General

Obligation-Unlimited Tax), “I”, 5%, 5/01/2044

500,000

519,620

6


MFS Active Intermediate Muni Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Municipal Bonds – continued

Michigan – continued

Wayne County, MI, Airport Authority Rev. (Detroit Metropolitan Wayne County Airport), “B”, 5%, 12/01/2042

$

250,000

$250,913

$2,160,808

Minnesota – 3.0%

Duluth, MN, Economic Development Authority, Health Care Facilities Rev. (Essentia Health), “A”, 5%, 2/15/2037

$

150,000

$151,988

Edina, MN, General Obligation Capital Improvement Plan and Sales Tax Rev., “B”, 4%, 2/01/2042

250,000

241,637

Minneapolis, MN, Health Care Systems Rev. (Fairview Health Services), “A”, 5%, 11/15/2035

160,000

162,981

Minnesota General Obligation State Trunk Highway Rev., “B”, 4%, 8/01/2041

500,000

485,857

Minnesota Housing Finance Agency, Residential Housing Finance Rev. (Social Bonds), “K”, GNMA, 4.25%, 7/01/2036

950,000

940,427

Minnesota Housing Finance Agency, Residential Housing Finance Rev., “F”, 5.75%, 7/01/2053

180,000

190,064

Minnesota Municipal Gas Agency, Gas Project Rev. (D/B/A Minnesota Community Energy), “A”, 5%, 9/01/2035

100,000

102,667

Minnetonka, MN, Independent School District No. 276, General Obligation School Building, Capital Appreciation, “A”, 0%,

2/01/2043

200,000

97,353

Saint Paul, MN, Metropolitan Airports Commission Subordinate Rev., “B”, 5.25%, 1/01/2042

190,000

198,928

St. Cloud, MN, Health Care Rev. (CentraCare Health System), 5%, 5/01/2036

500,000

544,451

$3,116,353

Missouri – 1.3%

Johnson County, MO, Knob Noster R-VIII School District, COP, 5%, 4/01/2043

$

300,000

$304,499

Missouri Health & Educational Facilities Authority, Health Facilities Rev. (BJC Health System), “A”, 5%, 4/01/2036

750,000

826,817

Sikeston, MO, Board of Municipal Utilities Lessee, Certificates of Participation, 5%, 9/01/2041

220,000

222,660

$1,353,976

Montana – 0.4%

Montana Facility Finance Authority Rev. (St. John's United Project), “B-3”, 4.1%, 11/15/2031

$

230,000

$230,459

Montana Facility Finance Authority, Health Facilities Rev. (Bozeman Deaconess Health Services Obligated Group), “B”, 5%,

6/01/2056 (Put Date 6/01/2036)

155,000

167,842

$398,301

Nebraska – 0.3%

Omaha, NE, Airport Authority, Airport Facilities Rev., AGM, 5.25%, 12/15/2040

$

300,000

$317,508

Nevada – 0.5%

Reno-Tahoe, NV, Airport Authority Rev., “A”, 5.25%, 7/01/2039 (w)

$

500,000

$533,147

New Hampshire – 1.2%

New Hampshire Business Finance Authority, Water Facility Rev. (Pennichuck Water Works, Inc. Project), “A”, 5.75%, 4/01/2035

$

105,000

$111,485

New Hampshire Health & Education Facilities Authority Rev. (Dartmouth Health), “A”, 5%, 8/01/2038

250,000

252,789

New Hampshire Health & Education Facilities Authority Rev. (Riverwoods at Exeter), 5%, 10/01/2035

125,000

134,533

New Hampshire National Finance Authority, Affordable Housing Certificates, “A-1”, 4.75%, 6/20/2041 (Put Date 6/01/2035)

248,988

254,301

New Hampshire National Finance Authority, Affordable Housing Certificates, “A-1”, 4.125%, 4/20/2043 (Put Date 3/01/2036)

299,557

287,560

New Hampshire National Finance Authority, Municipal Certificates, “A-1”, 4.085%, 1/20/2041

98,646

94,207

New Hampshire National Finance Authority, Municipal Certificates, “A-2”, 4.085%, 1/20/2041

98,646

91,677

$1,226,552

New Jersey – 1.3%

New Jersey Economic Development Authority, Dock & Wharf Facility Rev. (Repauno Port & Rail Terminal Project), 6.375%, 1/01/2035

$

100,000

$105,037

New Jersey Higher Education Student Assistance Authority, Senior Student Loan Refunding Rev., “A”, 5%, 12/01/2036

165,000

175,110

New Jersey Tobacco Settlement Financing Corp., “A”, 5.25%, 6/01/2046

215,000

215,356

New Jersey Transportation Trust Fund Authority, “A”, 4.25%, 6/15/2040

210,000

204,374

New Jersey Transportation Trust Fund Authority, “CC”, 5%, 6/15/2042

250,000

261,044

Passaic County, NJ, Improvement Authority, Charter School Rev. (Paterson Charter School for Science & Technology, Inc. Project),

4.125%, 7/01/2033

90,000

90,596

7


MFS Active Intermediate Muni Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Municipal Bonds – continued

New Jersey – continued

South Jersey, NJ, Port Corp., Subordinated Marine Terminal Rev., “B”, 5%, 1/01/2042

$

260,000

$260,637

$1,312,154

New Mexico – 0.6%

New Mexico Municipal Energy Acquisition Authority, Gas Supply Refunding Rev., 5%, 6/01/2054 (Put Date 11/01/2030)

$

100,000

$104,880

Santa Fe County, NM, Multi-Family Housing Rev. (Cresta Ranch Apartments), 3.29%, 12/10/2049 (Put Date 6/01/2028)

500,000

501,005

$605,885

New York – 4.3%

Geneva, NY, Development Corp. Rev. (Hobart & William Smith Colleges Project), 5%, 2/01/2039

$

500,000

$532,343

New York Dormitory Authority, New School Rev., “A”, 5%, 7/01/2042

250,000

250,123

New York Transportation Development Corp., Special Facilities Rev. (Delta Airlines, Inc. LaGuardia Airport Terminals C&D

Redevelopment Project), 5%, 1/01/2029

120,000

122,739

New York Transportation Development Corp., Special Facilities Rev. (Delta Airlines, Inc. LaGuardia Airport Terminals C&D

Redevelopment Project), 6%, 4/01/2035

250,000

274,308

New York Transportation Development Corp., Special Facilities Rev. (John F. Kennedy International Airport New Terminal One Project,

Green Bonds), 6%, 6/30/2040

250,000

273,467

New York Transportation Development Corp., Special Facilities Rev. (John F. Kennedy International Airport New Terminal One Project,

Green Bonds), AGM, 5.5%, 6/30/2042

245,000

254,457

New York Transportation Development Corp., Special Facilities Rev. (Terminal 4 John F. Kennedy International Airport Project), 5%,

12/01/2032

200,000

214,945

New York, NY, City Housing Development Corp., Multi-Family Housing Rev., “F-2”, 3.4%, 11/01/2064 (Put Date 1/02/2029)

500,000

501,623

New York, NY, City Housing Development Corp., Multi-Family Mortgage Rev. (8 Spruce Street), “E”, 4.375%, 12/15/2031

100,000

101,239

New York, NY, Transitional Finance Authority Rev., “D”, 5%, 5/01/2042

250,000

260,149

New York, NY, Transitional Finance Authority Rev., “D-1”, 4%, 11/01/2042

250,000

229,141

Rensselaer County, NY, Capital Resource Corp., Energy Performance Lease Rev. (Van Rensselaer Manor Nursing Home Project), 5%,

4/01/2038

500,000

542,674

Rockland County, NY, Solid Waste Management Authority, Special Obligation Rev. (Animal Shelter Project), “A”, 5.5%, 12/15/2044

340,000

366,184

Troy, NY, Capital Resource Corp. Rev. (Rensselaer Polytechnic Institute Project), 5%, 9/01/2036

500,000

542,405

$4,465,797

North Carolina – 2.4%

Greater Asheville, NC, Regional Airport Authority System Rev., “A”, AGM, 5.25%, 7/01/2038

$

500,000

$528,337

North Carolina Housing Finance Agency, Home Ownership Rev. (1998 Trust Agreement), 6.25%, 7/01/2057

125,000

139,775

North Carolina Medical Care Commission, Health Care Facilities First Mortgage Rev. (Lutheran Services for the Aging), “A”, 4%,

3/01/2030

125,000

127,212

North Carolina Medical Care Commission, Health Care Facilities First Mortgage Rev. (Porters Neck Village), “A”, 4%, 1/01/2036

240,000

236,028

North Carolina Medical Care Commission, Health Care Facilities First Mortgage Rev. (Porters Neck Village), “A”, 5%, 1/01/2041

400,000

406,886

North Carolina Medical Care Commission, Retirement Facilities First Mortgage Refunding Rev. (Pennybyrn at Maryfield), 5.25%,

10/01/2037

100,000

106,280

North Carolina Medical Care Commission, Retirement Facilities First Mortgage Rev. (Deerfield Episcopal Retirement Community

Project), “A”, 5.25%, 11/01/2046

250,000

254,159

North Carolina Medical Care Commission, Retirement Facilities First Mortgage Rev. (Penick Village Project), “B-3”, 4.25%,

9/01/2028

390,000

390,868

Raleigh, NC, Housing Authority, Multi-Family Housing Rev. (919 at Cross Link), “B”, 5%, 8/01/2028 (Put Date 8/01/2027)

250,000

254,514

$2,444,059

North Dakota – 0.2%

Grand Forks, ND, Health Care Systems Rev. (Altru Health System), 5%, 12/01/2030

$

120,000

$124,647

Horace, ND, Refunding Improvement, “C”, 5.5%, 5/01/2038

125,000

125,700

$250,347

8


MFS Active Intermediate Muni Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Municipal Bonds – continued

Ohio – 1.9%

Buckeye, OH, Tobacco Settlement Financing Authority, Senior Asset-Backed Refunding, “A-2”, 5%, 6/01/2033

$

250,000

$265,290

Columbus, OH, Metropolitan Housing Authority, General Rev. (Demorest Townhomes II Project), “A”, 4%, 5/01/2034

100,000

99,069

Columbus, OH, Metropolitan Housing Authority, General Rev. (Orchards Project & Eden Park Project), 5%, 12/01/2034

250,000

258,675

Columbus, OH, Regional Airport Authority Rev. (John Glenn Columbus International Airport), “A”, AGM, 5%, 1/01/2035

100,000

107,894

Cuyahoga County, OH, Hospital Rev. (MetroHealth System), 5.5%, 2/15/2052

350,000

350,509

Erie & Sandusky Counties, OH, Margaretta Local School District (Ohio Certificates of Participation School Facilities Project), BAM,

5.5%, 10/01/2037

145,000

155,518

Ohio State Healthcare Facility Rev. (Otterbein Homes Obligated Group), 4%, 7/01/2036

240,000

237,363

Shelby & Darke Counties, OH, Fort Loramie Local School District, Certificates of Participation, 5.25%, 12/01/2045

115,000

116,927

Wooster, OH, School District, Certificates of Participation, 5%, 12/01/2034 (w)

375,000

394,616

$1,985,861

Oklahoma – 2.6%

Cleveland County, OK, Home Loan Authority, Single Family Mortgage Rev., “A”, GNMA, 5.75%, 1/01/2056

$

245,000

$264,546

Garvin County, OK, Educational Facilities Authority, Lease Rev. (Elmore City-Pernell Public Schools Project), 5%, 9/01/2038

250,000

259,659

Lawton, OK, Industrial Development Authority, Sales Tax Rev., “A”, 5%, 7/01/2044

300,000

307,397

McCurtain County, OK, Educational Facilities Authority Rev. (Broken Bow Public Schools Project), 5%, 9/01/2036

500,000

541,932

Oklahoma City, OK, Public Property Authority, Arena Sales Tax Rev., 5%, 6/01/2034

750,000

831,510

Rogers County, OK, Educational Facilities Authority Lease Rev. (Oologah-Talala Public Schools Project), 5%, 9/01/2034

125,000

132,075

Tulsa County, OK, Home Finance Authority, Single Family Mortgage Rev., “A”, GNMA, 5.75%, 7/01/2056

125,000

135,740

Tulsa, OK, Airport Improvement Trust General Rev., “A”, BAM, 5%, 6/01/2028

245,000

253,244

$2,726,103

Oregon – 0.9%

Albany, OR, Hospital Facility Authority, Senior Living Rev. (Mennonite Village Project), “A”, 5%, 5/15/2036

$

210,000

$223,343

Albany, OR, Hospital Facility Authority, Senior Living Rev. (Mennonite Village Project), “A”, 5.25%, 5/15/2045

100,000

101,829

Oregon Facilities Authority Rev. (Legacy Health Project), “A”, 5%, 6/01/2035

180,000

180,885

Oregon Facilities Authority Rev. (Legacy Health Project), “A”, 5%, 6/01/2046

105,000

105,015

Union County, OR, Hospital Facility Authority Rev. (Grande Ronde Hospital Project), 5%, 7/01/2040

150,000

149,546

Washington, Clackamas, and Yamhill Counties, OR, Sherwood School District No. 88, General Obligation, Capital Appreciation, “A”,

0%, 6/15/2034

250,000

180,666

$941,284

Pennsylvania – 7.7%

Adams County, PA, General Authority Rev. (Brethren Home Community Project), “A”, 5%, 6/01/2034

$

120,000

$125,642

Allegheny County, PA, Airport Authority Rev. (Pittsburgh International Airport), “A”, AGM, 5%, 1/01/2036

215,000

230,255

Allegheny County, PA, Hospital Development Authority Rev. (Allegheny Health Network Obligated Group), “A”, 5%, 4/01/2036

245,000

248,466

Allegheny County, PA, North Allegheny School District, General Obligation, 4%, 5/01/2035

500,000

502,405

Chester County, PA, Health & Education Facilities Authority Rev. (Tel Hai Retirement Community Project), 5.125%, 6/01/2046

195,000

198,239

Cumberland County, PA, Cumberland Valley School District, General Obligation, AGM, 5%, 11/15/2046

165,000

169,525

Cumberland County, PA, Municipal Authority Rev. (Dickinson College Project), “A”, 5%, 11/01/2039

185,000

186,237

DuBois, PA, Hospital Rev. (Penn Highlands Healthcare), 5%, 7/15/2036

140,000

136,715

Erie County, PA, Sewer Authority Rev., BAM, 5%, 12/01/2042

165,000

169,435

Erie, PA, Higher Education Building Authority Rev. (AICUP Financing Program - Gannon University Project), “XX1”, 4%, 5/01/2033

100,000

96,628

Lancaster, PA, Municipal Authority, Healthcare Facilities Rev. (Luthercare Project), “A”, 4%, 12/01/2035

240,000

238,802

Luzerne County, PA, Hanover Area School District, General Obligation, BAM, 5%, 6/01/2043

100,000

103,508

Mercer County, PA, Hermitage Municipal Authority, Guaranteed Sewer Rev., 4%, 2/01/2039

500,000

474,589

Minersville, PA, Area School District, General Obligation, AGM, 5%, 4/01/2038

500,000

516,632

Northampton County, PA, General Purpose Authority, Hospital Rev. (St. Luke’s University Health Network Project), “A-1”, 5%,

8/15/2044

140,000

143,879

Pennsylvania Economic Development Financing Authority Rev. (University of Pittsburgh Medical Center), “A”, 5%,

3/15/2060 (Put Date 3/15/2035)

280,000

298,956

Pennsylvania Economic Development Financing Authority, Private Activity Rev. (PennDOT Major Bridges Package One Project),

5.25%, 6/30/2036

165,000

175,983

9


MFS Active Intermediate Muni Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Municipal Bonds – continued

Pennsylvania – continued

Pennsylvania Economic Development Financing Authority, Private Activity Rev. (PennDOT Major Bridges Package One Project), AGM,

5.5%, 6/30/2042

$

500,000

$527,551

Pennsylvania Economic Development Financing Authority, Private Activity Rev. (Rapid Bridge Replacement Project), 5%, 12/31/2034

500,000

500,648

Pennsylvania Higher Educational Assistance Agency, Education Loan Rev., “1A”, 4.125%, 6/01/2045

106,000

101,669

Pennsylvania Higher Educational Assistance Agency, Education Loan Rev., “1A”, 4.75%, 6/01/2046

83,000

80,104

Pennsylvania Higher Educational Facilities Authority Rev. (Drexel University), 5%, 5/01/2036

500,000

525,932

Pennsylvania Housing Finance Agency, Multi-Family Housing Development (Country Commons Apartments), FNMA, 3.6%,

8/01/2035

178,742

169,135

Pennsylvania Public School Building Authority, College Rev. (Delaware County Community College Project), BAM, 5.25%,

10/01/2044

265,000

272,337

Pennsylvania School District Authority Rev. (William Penn School District Project), “B”, BAM, 5%, 3/15/2043

100,000

103,066

Pennsylvania Turnpike Commission Rev., “A”, 5%, 12/01/2045

500,000

523,605

Philadelphia, PA, Hospitals and Higher Education Facilities Authority Rev. (Temple University Health System Obligated Group), AGM,

5%, 7/01/2036

115,000

121,255

Philadelphia, PA, Housing Authority, General Rev. (PHA Headquarters Project), 5%, 5/01/2039

250,000

253,836

Southeastern Pennsylvania Transportation Authority Rev. (Asset Improvement Program), 5.25%, 6/01/2047

135,000

140,418

West Cornwall, PA, Municipal Authority, Healthcare Facilities Rev. (Lebanon Valley Brethren Home Project), “A”, 5.125%,

11/15/2046

675,000

683,605

$8,019,057

Puerto Rico – 1.1%

Commonwealth of Puerto Rico, General Obligation Restructured, “A-1”, 5.625%, 7/01/2027

$

149,601

$152,045

Puerto Rico Electric Power Authority Rev., “VV”, NPFG, 5.25%, 7/01/2030

325,000

328,156

Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., “A-2”, 4.329%, 7/01/2040

250,000

244,403

Puerto Rico Sales Tax Financing Corp., Restructured Sales Tax Rev., Capital Appreciation, “A-1”, 0%, 7/01/2033

201,000

158,884

San Juan, PR, General Obligations, “A”, 5.25%, 7/01/2039

285,000

301,906

$1,185,394

Rhode Island – 0.9%

Providence, RI, Public Buildings Authority Rev. (Capital Improvement Program Projects), “A”, AGM, 5%, 9/15/2035

$

375,000

$378,847

Rhode Island Student Loan Authority, Education Loan Rev., “A”, 5%, 12/01/2034

250,000

265,432

Rhode Island Student Loan Authority, Education Loan Rev., “B”, 5%, 12/01/2033

250,000

266,002

Rhode Island Student Loan Authority, Education Loan Rev., “B”, 4.125%, 12/01/2043

65,000

60,715

$970,996

South Carolina – 1.2%

Charleston, SC, Housing Authority Rev. (1800 Ashley West), 4.5%, 9/01/2035

$

100,000

$99,479

South Carolina Jobs-Economic Development Authority, Economic Development Rev. (Foothill Affordable Housing Foundation -

Paddock Club and Fairway Projects), FHLMC, 4%, 3/01/2062 (Put Date 3/01/2035)

100,000

98,192

South Carolina Jobs-Economic Development Authority, Environmental Improvement Refunding Rev. (International Paper Company

Project), “A”, 3.95%, 4/01/2033

110,000

110,158

South Carolina Jobs-Economic Development Authority, Health Care Facilities Rev. (Novant Health Obligated Group), “A”, 5.5%,

11/01/2045

260,000

277,425

South Carolina Jobs-Economic Development Authority, Residential Development Rev. (Latitude at Wescott), 4%, 11/01/2035

200,000

195,186

South Carolina Jobs-Economic Development Authority, Solid Waste Disposal Rev. (Enerra South Carolina Project), 3.7%,

12/15/2027 (Put Date 12/01/2026)

105,000

104,978

South Carolina Medical University Hospital Authority, FHA-Insured Hospital Mortgage Rev. (Nexton Project), 5.25%, 5/15/2039

100,000

105,989

South Carolina Public Service Authority Rev. (Santee Cooper), “A”, 5%, 12/01/2038

85,000

85,046

South Carolina Public Service Authority Rev. (Santee Cooper), “B”, 5%, 12/01/2032

125,000

125,526

$1,201,979

South Dakota – 0.2%

Rapid City, SD, Sales Tax Rev., 5%, 12/01/2039 (w)

$

195,000

$205,463

10


MFS Active Intermediate Muni Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Municipal Bonds – continued

Tennessee – 0.7%

Knox County, TN, Health Educational & Housing Facility, Board Hospital Rev. (Covenant Health), “A”, 5%, 1/01/2042

$

125,000

$125,206

Metropolitan Nashville, TN, Airport Authority, Improvement Rev., “B”, 5%, 7/01/2046

250,000

252,973

Rutherford County, Tennessee, Health & Educational Facilities Board, Student Housing Rev. (Madrone - MTSU Student Housing I, LLC

Project), “A-1”, BAM, 5%, 7/01/2040

100,000

102,441

Tennessee Housing Development Agency, Residential Financing Program Rev., “2”, GNMA, 6%, 7/01/2034 (w)

215,000

251,800

$732,420

Texas – 9.9%

Arlington, TX, Higher Education Finance Corp., Education Rev. (Riverwalk Education Foundation, Inc.), 5%, 8/15/2042

$

250,000

$257,094

Arlington, TX, Higher Education Finance Corp., Refunding Rev. (Basis Texas Charter Schools, Inc.), 5.125%, 6/15/2040

130,000

130,078

Austin, TX, Airport System Refunding Rev., “B”, 5%, 11/15/2034

500,000

542,802

Brazos, TX, Higher Education Authority, Student Loan Program Rev., “1A”, 5%, 4/01/2035

525,000

561,243

Celina, TX, Special Assessment Refunding & Improvement Rev. (The Lakes at Mustang Ranch Public Improvement District Major

Improvement Area & Phases #2-7 Project), AGM, 5%, 9/01/2035

250,000

262,067

Central Texas Regional Mobility Authority, Senior Lien Rev., “A”, 5%, 1/01/2044

320,000

326,185

EP Cimarron Ventanas, TX, Residential Development Rev. (Home Essential Function Housing Program), 4%, 12/01/2034

250,000

245,500

EP Cimarron Ventanas, TX, Residential Development Rev. (Lifestyles at Los Paseos), 4.125%, 12/01/2039

20,000

18,726

Fort Worth, TX, Chaparral PFC Residential Development Rev. (Chaparral Ranch Project), 4%, 10/01/2035

130,000

125,375

Fort Worth, TX, Public Facility Corp., Residential Development Rev. (Skyline Prairie Homes Project), 5%, 4/01/2036

305,000

324,474

Fort Worth, TX, Special Tax Rev. (Convention Center Venue Project), 5.5%, 3/01/2043

100,000

104,148

FW Ramble Public Facility Corp., Texas Residential Development Rev. (Ramble & Rose Project), 4%, 10/01/2035

110,000

104,069

Galveston, TX, Wharves & Terminal, First Lien Rev., 5.25%, 8/01/2037

250,000

264,744

Galveston, TX, Wharves & Terminal, First Lien Rev., 5.25%, 8/01/2039

100,000

104,469

Godley, TX, Combination Tax & Rev., Certificates of Obligation, BAM, 5.25%, 8/15/2042

135,000

140,351

Grey Forest, TX, Gas System Rev., BAM, 5%, 2/01/2041

340,000

349,644

Grey Forest, TX, Gas System Rev., BAM, 5%, 2/01/2042

125,000

127,872

Houston, TX, Airport System Refunding Rev., “A”, 5.25%, 7/01/2038

385,000

416,174

Houston, TX, Airport System Special Facilities Rev. (United Airlines, Inc. Terminal Improvement Projects), “B”, 5.25%, 7/15/2034

150,000

158,067

Houston, TX, Convention & Entertainment Facilities Department, First Lien Hotel Occupancy Tax & Special Refunding Rev., “C”, 5%,

9/01/2039

500,000

528,819

Houston, TX, Redevelopment Authority Tax Increment Contract Rev., AGM, 5%, 9/01/2037

150,000

158,856

Jefferson County, Texas, Port Arthur Navigation District, Port Rev. (A Political Subdivision of The State of Texas Having Boundaries

Within Jefferson County), 5%, 3/01/2035 (w)

500,000

528,105

Las Varas, TX, Public Facility Corp., Essential Function Housing Development (Amara Apartments), 4.25%, 10/01/2035

105,000

101,606

Lower Colorado River Authority, Transmission Contract Refunding Rev. (LCRA Transmission Services Corp. Project), 5%, 5/15/2046

230,000

232,937

Mission, TX, Economic Development Corp., Solid Waste Disposal Rev. (Graphic Packaging International LLC Project, Green Bonds),

5%, 12/01/2064 (Put Date 6/01/2030)

100,000

102,723

Mission, TX, Economic Development Corp., Solid Waste Disposal Rev. (Graphic Packaging International LLC Project, Green Bonds),

5%, 12/01/2064 (Put Date 6/01/2030)

100,000

102,723

Mission, TX, Economic Development Corp., Solid Waste Disposal Rev. (Graphic Packaging International LLC Project, Green Bonds),

“A”, 5%, 12/01/2064 (Put Date 6/01/2030) (w)

100,000

102,561

New Hope, TX, Cultural Education Facilities Finance Corp., Retirement Facility Rev. (Bella Vida Forefront Living Project), “B-3”,

4.25%, 10/01/2030

100,000

100,057

New Hope, TX, Cultural Education Facilities Finance Corp., Retirement Facility Rev. (Brazos Presbyterian Homes, Inc. Project), 5.25%,

1/01/2040

130,000

133,024

New Hope, TX, Cultural Education Facilities Finance Corp., Retirement Facility Rev. (Morningside Ministries Project), “A”, 5%,

1/01/2035

150,000

144,313

New Hope, TX, Cultural Education Facilities Finance Corp., Retirement Facility Rev. (Westminster Project), 5%, 11/01/2035

160,000

171,743

North Central Texas Housing Finance Corp., Single Family Mortgage Rev. (Guaranteed Mortgage-Backed Securities Program), “A”,

GNMA, 4.15%, 7/01/2041

500,000

472,041

North Texas Higher Education Authority, Inc., Education Loan Rev., “A”, 5%, 6/01/2033

100,000

104,970

Pharr, TX, Tax & Revenue Certificates of Obligation, AGM, 5%, 8/15/2039

500,000

529,736

San Antonio, TX, Airport System Refunding Rev., 5.25%, 7/01/2037

165,000

180,753

11


MFS Active Intermediate Muni Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Municipal Bonds – continued

Texas – continued

San Antonio, TX, Public Facilities Corp., Improvement & Lease Rev. (Convention Center Refinancing & Expansion Project), 4%,

9/15/2042

$

390,000

$357,592

Tarrant County, TX, Cultural Education Facilities Finance Refunding Rev. (Trinity Terrace Project), 5%, 10/01/2038

135,000

140,950

Texas Department of Housing & Community Affairs, Residential Mortgage Rev., GNMA, 5.75%, 1/01/2056

245,000

264,656

Texas Grand Parkway Transportation Corp., Grand Parkway System, Subordinate Tier Toll Rev. (TELA Supported), “A”, 5%,

10/01/2043

300,000

304,453

Texas Metrocare Services Rev., 5%, 11/01/2044

275,000

282,901

Texas Municipal Gas Acquisition & Supply Corp. V, Gas Supply Rev., 5%, 1/01/2055 (Put Date 1/01/2034)

250,000

260,668

Texas Private Activity Surface Transportation Corp., Senior Lien Rev. (NTE Mobility Partners Segments 3 LLC), 5.375%, 6/30/2038

160,000

167,645

Texas Public Finance Authority Rev. (Texas Southern University), BAM, 5.25%, 5/01/2039

210,000

219,873

$10,256,787

Utah – 0.9%

Salt Lake City, UT, Airport Rev. (Salt Lake City International Airport), “A”, 5%, 7/01/2042

$

295,000

$296,080

Salt Lake City, UT, Downtown Revitalization Public Infrastructure District, Sales Tax Rev. (SEG Redevelopment Project), “C”, 5%,

7/15/2035

100,000

100,038

Utah Charter School Finance Authority, Charter School Refunding Rev. (Voyage Academy Project), 5%, 4/15/2040

100,000

101,710

Utah Charter School Finance Authority, Charter School Rev. (Lakeview Academy), 5%, 4/15/2040

150,000

154,270

Utah Intermountain Power Agency, Power Supply Rev., “A”, 5%, 7/01/2038

260,000

275,177

$927,275

Vermont – 0.3%

Vermont Student Assistance Corp., Education Loan Rev., “A”, 5%, 6/15/2033

$

250,000

$259,444

Virginia – 0.9%

Chesapeake, VA, Hospital Authority Facility Rev. (Chesapeake Regional Medical Center), 4%, 7/01/2036

$

320,000

$311,928

Virginia Small Business Financing Authority Rev. (I-495 HOT Lanes Project), 5%, 12/31/2038

125,000

127,983

Virginia Small Business Financing Authority Rev. (I-495 HOT Lanes Project), 5%, 12/31/2040

125,000

126,730

Virginia Small Business Financing Authority, Residential Care Facilities Refunding Rev. (Lifespire of Virginia), “A”, 5%, 12/01/2037

380,000

403,936

$970,577

Washington – 1.7%

Kenmore, WA, Limited Tax General Obligation, 5%, 12/01/2044

$

250,000

$262,306

King County, WA, Affordable Housing Authority Housing Rev. (Trailhead Project), “A-2”, 4.25%, 7/01/2036 (w)

140,000

137,181

King County, WA, Housing Authority, Pooled Housing Refunding Rev., 5%, 7/01/2040

170,000

171,838

Pasco, WA, Local Improvement District No. 152, 5.375%, 8/01/2042

65,000

68,647

Seattle, WA, Port Intermediate Lien Refunding Rev., “A”, 5%, 5/01/2033

250,000

252,794

Seattle, WA, Port Intermediate Lien Refunding Rev., “A”, 5%, 5/01/2036

250,000

252,298

Vancouver, WA, Housing Authority, Multi-Family Rev. (Battle Ground Portfolio), “A”, 4.625%, 2/01/2044

100,000

95,830

Vancouver, WA, Housing Authority, Multi-Family Rev. (Cascara Project), “A”, 5%, 12/01/2042

125,000

130,566

Washington State Housing Finance Commission, Nonprofit Housing Refunding Rev. (Horizon House Project), 5%, 1/01/2038 (n)

250,000

248,141

Washington Various Purpose General Obligation, “A”, 5%, 8/01/2046

100,000

102,902

$1,722,503

West Virginia – 0.3%

Ohio County, WV, Special District Excise Tax, Improvement Refunding Rev. (Fort Henry Economic Opportunity Development

District-The Highland Project), “A”, AGM, 5%, 6/01/2040

$

100,000

$104,377

West Virginia Economic Development Authority, University Facilities Refunding Rev. (Provident Group - Marshall

Properties LLC-Marshall University Project), “A-1”, AGM, 5%, 7/01/2042

210,000

216,240

$320,617

12


MFS Active Intermediate Muni Bond ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Municipal Bonds – continued

Wisconsin – 2.2%

Wisconsin Health & Educational Facilities Authority Rev. (Ascension Senior Credit Group), “A”, 4%, 11/15/2032

$

175,000

$175,021

Wisconsin Public Finance Authority Rev. (Kahala Nui Project), 5%, 11/15/2037

150,000

158,891

Wisconsin Public Finance Authority, Air Cargo Obligated Group Rev. (AFCO Airport Real Estate Group), 5%, 7/01/2033

310,000

321,331

Wisconsin Public Finance Authority, Air Cargo Obligated Group Rev. (AFCO Airport Real Estate Group), 5.5%, 7/01/2037

100,000

102,968

Wisconsin Public Finance Authority, Education Rev. (Mater Academy of Nevada-Cactus Park Campus Project), “A”, 5%, 12/15/2035

105,000

106,465

Wisconsin Public Finance Authority, Education Rev. (Pinecrest Academy of Nevada - Pinecrest Academy Springs Campus Project),

“A”, 4%, 7/15/2033

250,000

246,648

Wisconsin Public Finance Authority, Education Rev. (Triad Educational Services, Inc.), 5%, 6/15/2032

125,000

126,730

Wisconsin Public Finance Authority, Multi-Family Housing Rev. (Clipper Cove Apartments Project), 4%, 5/01/2036

370,000

355,930

Wisconsin Public Finance Authority, NHP Foundation Rev. (Emle Germantown Apartments), “A-1”, 4%, 5/01/2036

460,000

450,165

Wisconsin Public Finance Authority, Student Housing Facilities Rev. (Campus Real Estate Holding Corp. LLC Project), “A”, 5%,

6/01/2035

145,000

150,170

Wisconsin Public Finance Authority, Student Housing Rev. (KSU Bixby Real Estate Foundation LLC Project), “B”, 5.25%, 6/15/2035

100,000

106,998

$2,301,317

Total Municipal Bonds (Identified Cost, $103,615,689)

$101,782,502

Mutual Funds – 1.9%

Money Market Funds – 1.9%

State Street Institutional U.S. Government Money Market Fund - Premier Class, 3.62% (j) (Identified Cost, $1,996,915)

1,996,915

$1,996,915

Other Assets, Less Liabilities – (0.0)%

(14,339)

Net Assets – 100.0%

$103,765,078

(j)

The rate quoted is the annualized seven-day yield of the fund at period end.

(n)

Securities exempt from registration under Rule 144A of the Securities Act of 1933. These securities may be sold in the ordinary course of business in

transactions exempt from registration, normally to qualified institutional buyers. At period end, the aggregate value of these securities was $628,654,

representing 0.6% of net assets.

(w)

When-issued security.

The following abbreviations are used in this report and are defined:

AGM

Assured Guaranty Municipal

BAM

Build America Mutual

COP

Certificate of Participation

FHA

Federal Housing Administration

FHLMC

Federal Home Loan Mortgage Corp.

FNMA

Federal National Mortgage Assn.

GNMA

Government National Mortgage Assn.

NPFG

National Public Finance Guarantee Corp.

VRDN

Variable rate demand note that may be puttable to the issuer at the option of the holder. The stated interest rate, which generally resets either

daily or weekly, represents the rate in effect at period end and may not be the current rate.

See Notes to Financial Statements

13


MFS Active Intermediate Muni Bond ETF

Financial Statements | Statement of Assets and Liabilities

This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund. 

At 8/31/26 (unaudited)

Assets

Investments in unaffiliated issuers, at value (identified cost, $105,612,604)

$103,779,417

Receivables for

Investments sold

1,900,608

Interest

1,218,266

Total assets

$106,898,291

Liabilities

Payables for

Distributions

$312,988

Investments purchased

100,000

When-issued investments purchased

2,716,339

Payable to affiliates

Investment adviser

3,886

Total liabilities

$3,133,213

Net assets

$103,765,078

Net assets consist of

Paid-in capital

$105,716,053

Total distributable earnings (loss)

(1,950,975

)

Net assets

$103,765,078

Shares of beneficial interest outstanding (unlimited number of shares authorized)

4,225,000

Net asset value per share (net assets of $103,765,078 / 4,225,000 shares of beneficial interest outstanding)

$24.56

See Notes to Financial Statements

14


MFS Active Intermediate Muni Bond ETF

Financial Statements | Statement of Operations

This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. 

Six months ended 8/31/26 (unaudited)

Net investment income (loss)

Income

Interest

$1,794,427

Dividends from unaffiliated issuers

106,870

Total investment income

$1,901,297

Expenses

Management fee

$160,908

Miscellaneous

5

Total expenses

$160,913

Net investment income (loss)

$1,740,384

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers

$(105,679

)

Change in unrealized appreciation or depreciation

Unaffiliated issuers

$(3,060,956

)

Net realized and unrealized gain (loss)

$(3,166,635

)

Change in net assets from operations

$(1,426,251

)

See Notes to Financial Statements

15


MFS Active Intermediate Muni Bond ETF

Financial Statements |  Statements of Changes in Net Assets

These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. 

Six months ended

Year ended


8/31/26

(unaudited)


2/28/26

Change in net assets

From operations

Net investment income (loss)

$1,740,384

$1,775,199

Net realized gain (loss)

(105,679

)

(74,816

)

Net unrealized gain (loss)

(3,060,956

)

1,251,609

Change in net assets from operations

$(1,426,251

)

$2,951,992

Total distributions to shareholders

$(1,721,981

)

$(1,746,009

)

Change in net assets from fund share transactions

$28,725,035

$38,323,174

Miscellaneous capital

$20,594

$27,289

Total change in net assets

$25,597,397

$39,556,446

Net assets

At beginning of period

78,167,681

38,611,235

At end of period

$103,765,078

$78,167,681

See Notes to Financial Statements

16


MFS Active Intermediate Muni Bond ETF

Financial Statements | Financial Highlights

The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years (or life of the fund, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund (assuming reinvestment of all distributions) held for the entire period. 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25 (c)

Net asset value, beginning of period

$25.42

$24.91

$25.00

Income (loss) from investment operations

Net investment income (loss) (d)

$0.46

$0.93

$0.22

Net realized and unrealized gain (loss)

(0.88

)

0.45

(0.13

)

Total from investment operations

$(0.42

)

$1.38

$0.09

Less distributions declared to shareholders

From net investment income

$(0.45

)

$(0.88

)

$(0.19

)

Miscellaneous capital (d)

$0.01

$0.01

$0.01

Net asset value, end of period (x)

$24.56

$25.42

$24.91

Total return (%) (s)

(1.63

)(n)

5.76

0.41

(n)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses

0.34

(a)

0.34

0.34

(a)

Net investment income (loss)

3.68

(a)

3.77

3.72

(a)

Portfolio turnover rate (e)

17

(n)

12

7

(n)

Net assets at end of period (000 omitted)

$103,765

$78,168

$38,611

(a)

Annualized.

(c)

For the period from the commencement of the fund’s investment operations, December 5, 2024, through the stated period end.

(d)

Per share data is based on average shares outstanding.

(e)

Portfolio turnover rate excludes securities received or delivered in-kind in the process of creating or redeeming fund shares.

(n)

Not annualized.

(s)

From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.

(x)

The net asset value and total return have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted

accounting principles required at period end for financial reporting purposes.

See Notes to Financial Statements

17


MFS Active Intermediate Muni Bond ETF

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS Active Intermediate Muni Bond ETF (the fund) is a diversified series of MFS Active Exchange Traded Funds Trust (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

(2) Significant Accounting Policies

General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued. The fund invests primarily in municipal instruments, which generally trade in the over-the-counter market. The value of municipal instruments can be affected by changes in their actual or perceived credit quality. The credit quality of, and the ability to pay principal and interest when due by, an issuer of a municipal instrument depends on the credit quality of the entity supporting the municipal instrument, how essential any services supported by the municipal instrument are, the sufficiency of any revenues or taxes that support the municipal instrument, and/or the willingness or ability of the appropriate government entity to approve any appropriations necessary to support the municipal instrument. Municipal instruments may be supported by insurance which typically guarantees the timely payment of all principal and interest due on the underlying municipal instrument. The value of a municipal instrument can be volatile and significantly affected by adverse tax changes or court rulings, legislative or political changes, changes in specific or general market and economic conditions and developments in the region where the instrument is issued, and the financial condition of municipal issuers and of municipal instrument insurers of which there are a limited number. Also, because many municipal instruments are issued to finance similar projects, conditions in certain industries can significantly affect the fund and the overall municipal market. Municipal instruments may be more susceptible to downgrades or defaults during economic downturns or similar periods of economic stress, which in turn could affect the market values and marketability of many or all municipal obligations of issuers in a state, U.S. territory, or possession. If the Internal Revenue Service determines an issuer of a municipal instrument has not complied with the applicable tax requirements, interest from the security could become taxable, the security could decline in value, and certain distributions made by the fund could be taxable to shareholders.

Segment Reporting — An operating segment is defined in FASB Accounting Standards Codification Topic 280, Segment Reporting as a component of a public entity that engages in business activities from which it may recognize revenues and incur expenses, has operating results that are regularly reviewed by the entity’s chief operating decision maker (CODM) in making resource allocation decisions and assessing segment performance, and for which discrete financial information is available. The fund represents a single operating segment and the Chairman’s Committee of the fund's adviser acts as the segment’s CODM. The fund’s total returns, expense ratios, and changes in net assets which are used by the CODM to assess segment performance and to make resource allocation decisions to the segment are consistent with that presented within the fund’s financial statements.

Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.

Investment Valuations — Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.

18


MFS Active Intermediate Muni Bond ETF

Notes to Financial Statements (unaudited) - continued 

Under the fund's valuation policy and procedures, debt instruments and floating rate loans, including restricted debt instruments, are generally valued at an evaluated or composite bid as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at net asset value per share.

Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. Pricing services generally value debt instruments assuming orderly transactions of institutional round lot sizes, but a fund may hold or transact in such securities in smaller, odd lot sizes. In instances where a fund holds an odd lot size position in a debt instrument, such position will typically be valued using the pricing agent’s institutional round lot price for the debt instrument. Odd lots may trade at lower prices than institutional round lots, and the fund may receive different prices when it sells odd lot positions than it would receive for sales of institutional round lot positions. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of August 31, 2026 in valuing the fund's assets and liabilities:

Financial Instruments

Level 1

Level 2

Level 3

Total

Municipal Bonds

$—

$101,782,502

$—

$101,782,502

Investment Companies

1,996,915

—

—

1,996,915

Total

$1,996,915

$101,782,502

$—

$103,779,417

For further information regarding security characteristics, see the Portfolio of Investments.

Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.

Investment Transactions and Income —  Interest income is recorded on the accrual basis. All premium and discount is amortized or accreted for financial statement purposes in accordance with U.S. generally accepted accounting principles. Interest payments received in additional securities are recorded on the ex-interest date in an amount equal to the value of the security on such date.

The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.

19


MFS Active Intermediate Muni Bond ETF

Notes to Financial Statements (unaudited) - continued 

Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.

The fund may purchase or sell securities on a when-issued or delayed delivery basis. In these extended settlement transactions, the receipt or delivery of the securities by the fund and related payments occur at a future date, usually beyond the customary settlement period. The price of such security and the date that the security will be settled are generally fixed at the time the transaction is negotiated. The value of the security varies with market fluctuations and for debt securities no interest accrues to the fund until settlement takes place. When the fund sells securities on a when-issued or delayed delivery basis, the fund typically owns or has the right to acquire securities equivalent in kind and amount to the securities sold. Purchase and sale commitments for when-issued or delayed delivery securities are held at carrying amount, which approximates fair value and are categorized as level 2 within the fair value hierarchy, and included in When-issued investments purchased and When-issued investments sold in the Statement of Assets and Liabilities, as applicable. Losses may arise due to changes in the value of the underlying securities prior to settlement date or if the counterparty does not perform under the contract’s terms, or if the issuer does not issue the securities.

Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable and tax-exempt income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for generally a three-year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability.

Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.

Book/tax differences primarily relate to amortization of premium and accretion of discount of debt securities.

The tax character of distributions made during the current period will be determined at fiscal year end. The tax character of distributions declared to shareholders for the last fiscal year is as follows: 

Year ended

2/28/26

Ordinary income (including any short-term capital gains)

$54,481

Tax-exempt income

1,691,528

Total distributions

$1,746,009

The federal tax cost and the tax basis components of distributable earnings were as follows: 

As of 8/31/26

Cost of investments

$105,555,754

Gross appreciation

235,951

Gross depreciation

(2,012,288

)

Net unrealized appreciation (depreciation)

$(1,776,337

)

As of 2/28/26

Undistributed ordinary income

6,628

Undistributed tax-exempt income

175,306

Capital loss carryforwards

(68,243

)

Other temporary differences

(180,006

)

Net unrealized appreciation (depreciation)

1,263,572

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

As of February 28, 2026, the fund had capital loss carryforwards available to offset future realized gains. These net capital losses may be carried forward indefinitely and their character is retained as short-term and/or long-term losses. Such losses are characterized as follows: 

Short-Term

$(68,243

)

20


MFS Active Intermediate Muni Bond ETF

Notes to Financial Statements (unaudited) - continued 

(3) Transactions with Affiliates

Investment Adviser — The fund has an Investment Management Agreement (“Management Agreement”) with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.34% of the fund’s average daily net assets. Under the Management Agreement, MFS will pay substantially all the fund’s operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), litigation expenses, the cost of proxy solicitations and shareholder meetings, the fee paid to MFS pursuant to this agreement, and such other expenses as approved by a majority of the fund’s Board of Trustees.

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly owned subsidiary of MFS, is the distributor of shares of the fund. The fund has adopted a plan in accordance with Rule 12b-1 under the Investment Company Act of 1940, as amended (the Distribution Plan). The fund’s Board of Trustees has determined not to implement payments of Rule 12b-1 fees under the Distribution Plan at this time. The fund does not currently pay compensation to MFD for any distribution services provided.

Administrator — MFS provides certain financial, legal, and other administrative services to the fund. MFS bears the costs of the services under the Management Agreement.

Trustees’ and Officers’ Compensation — Under the Management Agreement, MFS pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. MFS also pays compensation to Trustees or officers of the fund who are also officers of the investment adviser for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS and MFD. The fund did not pay any compensation to the independent Trustees for the six months ended August 31, 2026.

(4) Portfolio Securities

For the six months ended August 31, 2026, purchases and sales of investments, other than short-term obligations and in-kind transactions, aggregated $46,199,265 and $15,005,209, respectively. Securities received and delivered in-kind through subscriptions and redemptions aggregated $120,386 and $0, respectively.

(5) Purchase and Sales of Fund Shares

The fund issues and redeems shares through MFD at net asset value (“NAV”) only with Authorized Participants and only in large blocks of shares (each, a Creation Unit). An Authorized Participant may purchase or redeem a Creation Unit each business day that the fund is open in exchange for the delivery or receipt of a designated portfolio of in-kind securities and/or cash. Authorized Participants may pay a fixed purchase or redemption transaction fee to offset the transfer and other transaction costs associated with the issuance and redemption of Creation Units.  An additional variable fee may be charged for certain transactions. These variable fees are included in “Miscellaneous capital” in the Statement of Changes in Net Assets.

Individual fund shares may not be purchased or redeemed directly with the fund. Shares are listed for trading on the New York Stock Exchange, and individual fund shares may only be purchased and sold in the secondary market through a financial intermediary at market price. Because the fund’s shares will trade at market prices rather than NAV, shares may trade at prices greater than NAV (at a premium), at NAV, or less than NAV (at a discount). Transactions in fund shares were as follows: 

Six months ended

8/31/26

Year ended

2/28/26

Shares

Amount

Shares

Amount

Shares sold

1,150,000

$28,725,035

1,525,000

$38,323,174

21


ITEM 8. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active Intermediate Muni Bond ETF.

ITEM 9.  PROXY DISCLOSURES FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active Intermediate Muni Bond ETF.

ITEM 10. REMUNERATION PAID TO DIRECTORS, OFFICERS, AND OTHERS OF OPEN-END MANAGEMENT INVESTMENT COMPANIES.

This information is disclosed as part of the financial statements included in Item 7 above for MFS Active Intermediate Muni Bond ETF. See the Statement of Operations and Note 3 within the Notes to Financial Statements for more information.

ITEM 11. STATEMENT REGARDING BASIS FOR APPROVAL OF INVESTMENT ADVISORY CONTRACT.

22


MFS Active Intermediate Muni Bond ETF

Board Review of Investment Management Agreement

MFS Active Intermediate Muni Bond ETF

The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested (“independent”) Trustees, voting separately, annually approve the continuation of the Fund’s investment management agreement with MFS. The Trustees consider matters bearing on the Fund and its advisory arrangements at their meetings throughout the year, including a review of performance data at each regular meeting. In addition, the independent Trustees met several times over the course of several months beginning in April and ending in July, 2026 (“contract review meetings”) for the specific purpose of considering whether to approve the continuation of the investment management agreement for the Fund and the other investment companies that the Board oversees (the “MFS Funds”). The independent Trustees were assisted in their evaluation of the Fund’s investment management agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS during various contract review meetings. The independent Trustees were also assisted in this process by an independent consultant who was retained by and reported to the independent Trustees.

In connection with their deliberations regarding the continuation of the investment management agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant.  The investment management agreement for the Fund was considered separately, although the Trustees also took into account the common interests of all MFS Funds in their review. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services performed by MFS under the existing investment management agreement and other arrangements with the Fund. The independent Trustees considered that the Fund has a unitary management fee structure, pursuant to which MFS receives a fee covering investment management and administrative services, with MFS paying the Fund’s ordinary, recurring operating expenses (the “Unitary Fee”), subject to certain exceptions.

In connection with their contract review meetings, the Trustees received and relied upon materials that included, among other items: (i) information provided by Broadridge Financial Solutions, Inc. (“Broadridge”), an independent third party, on the investment performance of the Fund for the one-year period ended December 31, 2025 and the investment performance of a group of funds with substantially similar investment classifications/objectives (the “Broadridge performance universe”), (ii) information provided by Broadridge on the Fund’s Unitary Fee and the advisory fees and other expenses of comparable funds identified by Broadridge, as well as all other funds in the same investment classification/category (the “Broadridge expense group and universe”),  (iii) information provided by MFS on the advisory fees of portfolios of other clients of MFS, including institutional separate accounts, (iv) information regarding MFS’ financial results and financial condition, including MFS’ and certain of its affiliates’ estimated profitability from services performed for the Fund and the MFS Funds as a whole, and compared to MFS’ institutional business, (v) MFS’ views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vi) descriptions of various functions performed by MFS for the MFS Funds, such as compliance monitoring and portfolio trading practices, and (vii) information regarding the overall organization of MFS, including information about MFS’ senior management and other personnel providing investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative performance, fee and expense information prepared and provided by Broadridge was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS.

The Trustees’ conclusion as to the continuation of the investment management agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor.  Some of the factors that figured particularly in the Trustees’ deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors.  It is also important to recognize that the fee arrangements for the Fund and other MFS Funds are the result of years of review and discussion between the independent Trustees and MFS, that certain aspects of such arrangements may receive greater scrutiny in some years than in others, and that the Trustees’ conclusions may be based, in part, on their consideration of these same arrangements during the course of the year and in prior years.

Based on information provided by Broadridge and MFS, the Trustees reviewed the Fund’s total return investment performance as well as the Broadridge performance universe over the one-year period ended December 31, 2025. The total return performance of the Fund was in the 1st quintile relative to the other funds in the universe for this one-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers). The Fund commenced operations on December 5, 2024, and has a limited operating history and performance record; therefore, no performance data for the three- or five-year periods was available.  Because of the passage of time, these performance results may differ from the performance results for more recent periods, including those shown elsewhere in this report.

23


MFS Active Intermediate Muni Bond ETF

Board Review of Investment Management Agreement - continued

In the course of their deliberations, the Trustees took into account information provided by MFS in connection with the contract review meetings as well as during investment review meetings conducted with portfolio management personnel during the course of the year regarding the Fund’s performance. After reviewing these and related factors, the Trustees concluded, within the context of their overall conclusions regarding the investment management agreement, that they were satisfied with MFS’ responses and efforts relating to investment performance.

In assessing the reasonableness of the Fund’s Unitary Fee, the Trustees considered, among other things, information on unitary fee structures generally, as well as the terms of the investment management agreement and descriptions of various services performed or procured by MFS under the investment management agreement, including portfolio management and portfolio trading practices and administrative services. The Trustees considered the categories of expenses excluded from the Unitary Fee and therefore payable by the Fund. The Trustees also considered the Fund’s Unitary Fee as compared with the advisory fee and total expense ratios of the Broadridge expense group based on information provided by Broadridge. The Trustees considered that, according to the data provided by Broadridge, the Fund’s Unitary Fee and total expense ratio were each approximately at the applicable Broadridge expense group median.

The Trustees also considered the advisory fees charged by MFS to any institutional separate accounts advised by MFS (“separate accounts”) and unaffiliated investment companies for which MFS serves as subadviser (“subadvised funds”) that have comparable investment strategies to the Fund, if any.  In comparing these fees, the Trustees considered information provided by MFS as to the generally broader scope of services provided by MFS to the Fund, as well as the more extensive regulatory burdens imposed on MFS in managing the Fund, in comparison to separate accounts and subadvised funds.  The Trustees also considered the higher demands placed on MFS’ investment personnel and trading infrastructure as a result of the daily cash in-flows and out-flows of the Fund in comparison to separate accounts.

The Trustees considered that the investment management agreement provides for a unitary fee level that does not include pre-established breakpoints, and considered MFS’ observation that while fee waivers, breakpoints, and expense caps are common for mutual funds, these arrangements are not typically used by ETFs.

The Trustees also considered information prepared by MFS relating to MFS’ costs and profits with respect to the Fund, the MFS Funds considered as a group, and other investment companies and accounts advised by MFS, as well as MFS’ methodologies used to determine and allocate its costs to the MFS Funds, the Fund, and other accounts and products for purposes of estimating profitability.

After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the investment management agreement, that the Unitary Fee charged to the Fund represents reasonable compensation in light of the services being provided by MFS to the Fund.

In addition, the Trustees considered MFS’ resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund.  The Trustees also considered current and developing conditions in the financial services industry, including the presence of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies.  In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc.  The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser that also serves other investment companies as well as other accounts.

The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services provided to the Fund by MFS and its affiliates under agreements and plans other than the investment management agreement. The Trustees also considered the nature, extent and quality of certain other services MFS may perform or arrange for on the Fund’s behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS’ interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services provided by MFS and its affiliates on behalf of the Fund were satisfactory.

The Trustees considered so-called “fall-out benefits” to MFS such as reputational value derived from serving as investment manager to the MFS Funds. The Trustees also considered that MFS discontinued its historic practice of obtaining investment research from portfolio brokerage commissions paid by certain MFS Funds effective January 2018, and directly pays or voluntarily reimburses a Fund, if applicable, for the costs of external research acquired through the use of the Fund’s portfolio brokerage commissions.

Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including the independent Trustees, concluded that the Fund’s investment management agreement with MFS should be continued for an additional one-year period, commencing August 1, 2026.

24


MFS Active International ETF

ITEM 7.  FINANCIAL STATEMENTS AND FINANCIAL HIGHLIGHTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

MFS Active International ETF

Portfolio of Investments − 8/31/26 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

Issuer

Shares/Par

Value ($)

Common Stocks – 98.5%

Aerospace & Defense – 2.3%

MTU Aero Engines Holding AG

8,762

$3,583,497

Rolls-Royce Holdings PLC

1,169,055

24,239,444

$27,822,941

Alcoholic Beverages – 1.6%

China Resources Beer Holdings Co. Ltd.

1,837,279

$4,528,476

Heineken N.V.

36,310

3,066,185

Kweichow Moutai Co. Ltd., “A”

32,700

6,323,698

Pernod Ricard S.A.

81,468

6,103,578

$20,021,937

Apparel, Footwear, & Accessories – 3.5%

ANTA Sports Products Ltd.

826,252

$8,190,367

Compagnie Financiere Richemont S.A.

103,439

24,588,116

LVMH Moet Hennessy Louis Vuitton SE

18,941

9,973,012

$42,751,495

Auto & Auto Components – 2.5%

Bridgestone Corp.

259,258

$6,726,913

BYD Co. Ltd., ADR

304,378

3,357,289

DENSO Corp.

579,846

7,023,487

Mahindra & Mahindra Ltd.

125,271

4,319,542

Suzuki Motor Corp.

672,889

9,380,431

$30,807,662

Business Services – 3.7%

CGI, Inc.

109,267

$8,227,645

Compass Group PLC

556,519

17,057,307

Edenred

188,084

6,571,544

Experian PLC

320,397

13,215,165

$45,071,661

Chemicals – 3.3%

Air Liquide S.A.

110,300

$21,721,279

FUJIFILM Holdings Corp.

294,412

6,247,616

Shin-Etsu Chemical Co. Ltd.

323,466

12,195,529

$40,164,424

Construction – 1.5%

Compagnie de Saint-Gobain S.A.

115,095

$10,470,486

Haier Smart Home Co. Ltd., “H”

2,974,406

8,181,234

$18,651,720

Consumer Products – 0.9%

Beiersdorf AG

119,508

$10,983,000

EIEFS-SEM

1


MFS Active International ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Diversified Financial Services – 2.5%

B3 S.A. - Brasil Bolsa Balcao

2,660,752

$8,329,052

Deutsche Boerse AG

37,505

12,546,407

Hong Kong Exchanges & Clearing Ltd.

72,526

3,934,203

London Stock Exchange Group PLC

48,375

5,899,334

$30,708,996

Electrical Equipment – 3.8%

Mitsubishi Electric Corp.

601,661

$21,034,596

Schneider Electric SE

74,567

25,516,266

$46,550,862

Energy - Independent – 4.8%

Eni S.p.A.

716,794

$19,403,549

Reliance Industries Ltd.

560,753

7,523,347

TotalEnergies SE

245,136

21,506,230

Woodside Energy Group Ltd.

444,345

10,323,097

$58,756,223

Entertainment & Leisure – 4.3%

NetEase, Inc., ADR

87,818

$10,694,476

Sony Group Corp.

550,706

13,844,352

Tencent Holdings Ltd., ADR

489,208

27,977,806

$52,516,634

Food & Beverages – 1.0%

Inner Mongolia Yili Industrial Group Co. Ltd., “A”

1,453,100

$5,730,359

Nestle S.A.

69,404

6,767,394

$12,497,753

Food & Drug Stores – 2.1%

Seven & I Holdings Co. Ltd.

945,056

$11,985,499

Tesco PLC

2,113,937

13,098,838

$25,084,337

Global Systemically Important Banks – 8.8%

BNP Paribas S.A.

171,998

$20,533,818

ING Groep N.V.

642,487

22,750,359

Royal Bank of Canada

40,796

8,328,503

Sumitomo Mitsui Financial Group, Inc.

405,957

17,724,883

Toronto-Dominion Bank

180,660

21,843,601

UBS Group AG

299,864

16,708,422

$107,889,586

Hardware, Peripherals, & Assembly – 7.6%

Amadeus IT Group S.A.

178,731

$12,086,757

Hitachi Ltd.

722,832

24,605,699

Hon Hai Precision Industry Co. Ltd.

1,697,898

13,381,076

Samsung Electronics Co. Ltd.

225,562

42,851,177

$92,924,709

2


MFS Active International ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Insurance – 4.7%

AIA Group Ltd., ADR

396,226

$15,345,833

Intact Financial Corp.

48,081

9,306,750

Prudential PLC

375,874

5,184,771

Sompo Holdings, Inc.

367,389

15,753,456

Zurich Insurance Group AG

15,426

11,308,774

$56,899,584

Interactive Media Services – 0.6%

LY Corp.

2,185,353

$7,605,986

Machinery & Tools – 1.7%

Daikin Industries Ltd.

77,221

$10,226,042

KONE Oyj, “B”

177,457

10,879,282

$21,105,324

Media – 0.9%

RELX PLC

232,952

$8,434,171

Wolters Kluwer N.V.

35,176

2,894,428

$11,328,599

Medical Equipment – 1.8%

QIAGEN N.V.

46,837

$2,027,574

Sonova Holding AG

38,755

11,132,444

Terumo Corp.

568,824

8,958,755

$22,118,773

Metals & Mining – 3.0%

Franco-Nevada Corp.

45,049

$11,854,644

Gerdau S.A., ADR

2,048,380

9,443,032

Glencore PLC

726,993

5,867,113

Rio Tinto PLC

91,783

9,543,849

$36,708,638

Non-Global Systemically Important Banks – 9.7%

Banco Bilbao Vizcaya Argentaria S.A.

263,861

$7,671,385

Banco Bradesco S.A., ADR

2,715,909

8,908,181

Bank of Ireland Group PLC

758,931

16,735,959

Credicorp Ltd.

29,437

10,785,128

DBS Group Holdings Ltd.

241,872

14,728,104

HDFC Bank Ltd., ADR

396,598

9,002,775

Intesa Sanpaolo S.p.A.

2,778,706

21,912,207

Kotak Mahindra Bank Ltd.

1,929,454

8,501,811

NatWest Group PLC

2,142,770

19,726,072

$117,971,622

Pharmaceuticals & Biotechnology – 6.3%

GSK PLC

462,726

$11,621,335

Merck KGaA

91,699

14,805,296

Novartis AG

151,754

23,139,974

Novo Nordisk A.S., “B”

97,611

4,435,037

Roche Holding AG

52,384

22,862,714

$76,864,356

3


MFS Active International ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Restaurants – 0.4%

Yum China Holdings, Inc.

116,661

$5,204,247

Retail & E-commerce – 0.5%

PDD Holdings, Inc., ADR (a)

66,979

$5,626,236

Semiconductor & Electronic Components – 7.9%

Advantest Corp.

182

$38,383

Hoya Corp.

45,654

7,030,287

Taiwan Semiconductor Manufacturing Co. Ltd., ADR

215,632

89,556,282

$96,624,952

Software – 3.0%

Check Point Software Technologies Ltd. (a)

133,106

$18,489,754

SAP SE

81,652

18,105,498

$36,595,252

Tobacco – 1.0%

British American Tobacco PLC, ADR

213,985

$11,891,146

Travel, Gaming, & Lodging – 1.4%

Ryanair Holdings PLC, ADR

247,699

$13,715,094

Sands China Ltd.

2,077,484

3,723,778

$17,438,872

Utilities – 1.4%

ENGIE S.A.

578,389

$16,526,955

Total Common Stocks (Identified Cost, $1,048,904,527)

$1,203,714,482

Mutual Funds – 1.3%

Money Market Funds – 1.3%

State Street Institutional U.S. Government Money Market Fund - Premier Class, 3.62% (j) (Identified Cost, $15,604,974)

15,604,974

$15,604,974

Other Assets, Less Liabilities – 0.2%

2,977,645

Net Assets – 100.0%

$1,222,297,101

(a)

Non-income producing security.

(j)

The rate quoted is the annualized seven-day yield of the fund at period end.

The following abbreviations are used in this report and are defined:

ADR

American Depositary Receipt

See Notes to Financial Statements

4


MFS Active International ETF

Financial Statements | Statement of Assets and Liabilities

This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund. 

At 8/31/26 (unaudited)

Assets

Investments in unaffiliated issuers, at value (identified cost, $1,064,509,501)

$1,219,319,456

Cash

787,813

Foreign currency, at value (identified cost, $253,635)

253,502

Receivables for

Interest and dividends

2,506,382

Other assets

4,753

Total assets

$1,222,871,906

Liabilities

Payables for

Investments purchased

$496,054

Payable to affiliates

Investment adviser

78,751

Total liabilities

$574,805

Net assets

$1,222,297,101

Net assets consist of

Paid-in capital

$1,058,094,346

Total distributable earnings (loss)

164,202,755

Net assets

$1,222,297,101

Shares of beneficial interest outstanding (unlimited number of shares authorized)

36,425,000

Net asset value per share (net assets of $1,222,297,101 / 36,425,000 shares of beneficial interest outstanding)

$33.56

See Notes to Financial Statements

5


MFS Active International ETF

Financial Statements | Statement of Operations

This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. 

Six months ended 8/31/26 (unaudited)

Net investment income (loss)

Income

Dividends from unaffiliated issuers

$18,809,901

Income on securities loaned

5,247

Other

1,174

Foreign taxes withheld

(1,892,105

)

Total investment income

$16,924,217

Expenses

Management fee

$3,142,393

Miscellaneous

1,354

Total expenses

$3,143,747

Net investment income (loss)

$13,780,470

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers

$(3,548,449

)

Foreign currency

(72,970

)

In-kind redemptions – unaffiliated issuers

1,935,729

Net realized gain (loss)

$(1,685,690

)

Change in unrealized appreciation or depreciation

Unaffiliated issuers

$42,015,961

Translation of assets and liabilities in foreign currencies

(19,251

)

Net unrealized gain (loss)

$41,996,710

Net realized and unrealized gain (loss)

$40,311,020

Change in net assets from operations

$54,091,490

See Notes to Financial Statements

6


MFS Active International ETF

Financial Statements |  Statements of Changes in Net Assets

These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. 

Six months ended

Year ended


8/31/26

(unaudited)


2/28/26

Change in net assets

From operations

Net investment income (loss)

$13,780,470

$5,807,282

Net realized gain (loss)

(1,685,690

)

(1,257,047

)

Net unrealized gain (loss)

41,996,710

109,910,069

Change in net assets from operations

$54,091,490

$114,460,304

Total distributions to shareholders

$(440,063

)

$(5,484,760

)

Change in net assets from fund share transactions

$295,318,533

$603,125,983

Miscellaneous capital

$188,953

$173,450

Total change in net assets

$349,158,913

$712,274,977

Net assets

At beginning of period

873,138,188

160,863,211

At end of period

$1,222,297,101

$873,138,188

See Notes to Financial Statements

7


MFS Active International ETF

Financial Statements | Financial Highlights

The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years (or life of the fund, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund (assuming reinvestment of all distributions) held for the entire period. 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25 (c)

Net asset value, beginning of period

$32.37

$25.64

$25.08

Income (loss) from investment operations

Net investment income (loss) (d)

$0.42

$0.38

$0.01

Net realized and unrealized gain (loss)

0.77

6.59

0.54

Total from investment operations

$1.19

$6.97

$0.55

Less distributions declared to shareholders

From net investment income

$(0.01

)

$(0.25

)

$—

Miscellaneous capital (d)

$0.01

$0.01

$0.01

Net asset value, end of period (x)

$33.56

$32.37

$25.64

Total return (%) (s)(x)

3.71

(n)

27.31

2.21

(n)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses

0.59

(a)

0.59

0.59

(a)

Net investment income (loss)

2.59

(a)

1.30

0.19

(a)

Portfolio turnover rate (e)

5

(n)

10

2

(n)

Net assets at end of period (000 omitted)

$1,222,297

$873,138

$160,863

(a)

Annualized.

(c)

For the period from the commencement of the fund’s investment operations, December 5, 2024, through the stated period end.

(d)

Per share data is based on average shares outstanding.

(e)

Portfolio turnover rate excludes securities received or delivered in-kind in the process of creating or redeeming fund shares.

(n)

Not annualized.

(s)

From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.

(x)

The net asset value and total return have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted

accounting principles required at period end for financial reporting purposes.

See Notes to Financial Statements

8


MFS Active International ETF

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS Active International ETF (the fund) is a diversified series of MFS Active Exchange Traded Funds Trust (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

(2) Significant Accounting Policies

General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued. The fund invests in foreign securities, including securities of emerging market issuers. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country’s market, economic, industrial, political, regulatory, geopolitical, environmental, public health, and other conditions. Investments tied economically to emerging markets, especially frontier markets, can involve additional and greater risks than the risks associated with investments in developed markets.  Emerging markets can have less developed markets, greater custody and operational risk, less developed legal, regulatory, and accounting systems, greater government involvement in the economy, greater risk of new or inconsistent government treatment of or restrictions on issuers and instruments, and greater political, social, geopolitical, and economic instability than developed markets.

Segment Reporting — An operating segment is defined in FASB Accounting Standards Codification Topic 280, Segment Reporting as a component of a public entity that engages in business activities from which it may recognize revenues and incur expenses, has operating results that are regularly reviewed by the entity’s chief operating decision maker (CODM) in making resource allocation decisions and assessing segment performance, and for which discrete financial information is available. The fund represents a single operating segment and the Chairman’s Committee of the fund's adviser acts as the segment’s CODM. The fund’s total returns, expense ratios, and changes in net assets which are used by the CODM to assess segment performance and to make resource allocation decisions to the segment are consistent with that presented within the fund’s financial statements.

Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.

Investment Valuations — Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.

Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

9


MFS Active International ETF

Notes to Financial Statements (unaudited) - continued 

Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of August 31, 2026 in valuing the fund's assets and liabilities:

Financial Instruments

Level 1

Level 2

Level 3

Total

Equity Securities

$1,203,714,482

$—

$—

$1,203,714,482

Investment Companies

15,604,974

—

—

15,604,974

Total

$1,219,319,456

$—

$—

$1,219,319,456

For further information regarding security characteristics, see the Portfolio of Investments.

Foreign Currency Translation — Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions or on the reporting date for foreign denominated receivables and payables. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on receivables, payables, income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed.

Security Loans — Under its Securities Lending Agency Agreement with the fund, Goldman Sachs Agency Lending, as lending agent, loans the securities of the fund to certain qualified institutions (the “Borrowers”) approved by the fund. Security loans can be terminated at the discretion of either the lending agent or the fund and the related securities must be returned within the earlier of the standard trade settlement period for such securities or within five business days. The loans are collateralized by cash and/or U.S. government securities in an amount typically at least equal to the market value of the securities loaned. On loans collateralized by cash, the cash collateral is invested in a money market fund. The market value of the loaned securities is determined at the close of business of the fund and any additional required collateral is delivered to the fund on the next business day. The lending agent provides the fund with indemnification against Borrower default. In the event of Borrower default, the lending agent will, for the benefit of the fund, either purchase securities identical to those loaned or pay the fund the market value of the loaned securities. In return, the lending agent assumes the fund's rights to the related collateral. If the collateral value is less than the cost to purchase identical securities or the cash needed to pay their market value, the lending agent is responsible for the shortfall, but only to the extent that such shortfall is not due to a decline in collateral value resulting from collateral reinvestment for which the fund bears the risk of loss. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. government securities, a fee is received from the

10


MFS Active International ETF

Notes to Financial Statements (unaudited) - continued 

Borrower, and is allocated between the fund and the lending agent. Income from securities lending is separately reported in the Statement of Operations. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income. At August 31, 2026, there were no securities on loan or collateral outstanding.

Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.

Investment Transactions and Income —  Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend payments received in additional securities are recorded on the ex-dividend date in an amount equal to the value of the security on such date.

The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.

Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.

Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for generally a three-year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.

Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.

Book/tax differences primarily relate to wash sale loss deferrals and redemptions in-kind.

The tax character of distributions made during the six months ended August 31, 2026 will be determined at fiscal year end. The tax character of distributions declared to shareholders for the last fiscal year is as follows: 

Year ended

2/28/26

Ordinary income (including any short-term capital gains)

$5,484,760

The federal tax cost and the tax basis components of distributable earnings were as follows: 

As of 8/31/26

Cost of investments

$1,064,649,755

Gross appreciation

195,712,783

Gross depreciation

(41,043,082

)

Net unrealized appreciation (depreciation)

$154,669,701

As of 2/28/26

Undistributed ordinary income

433,152

Capital loss carryforwards

(2,498,249

)

Other temporary differences

(37,315

)

Net unrealized appreciation (depreciation)

112,653,740

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

11


MFS Active International ETF

Notes to Financial Statements (unaudited) - continued 

As of February 28, 2026, the fund had capital loss carryforwards available to offset future realized gains. These net capital losses may be carried forward indefinitely and their character is retained as short-term and/or long-term losses. Such losses are characterized as follows: 

Short-Term

$(2,178,404

)

Long-Term

(319,845

)

Total

$(2,498,249

)

(3) Transactions with Affiliates

Investment Adviser — The fund has an Investment Management Agreement (“Management Agreement”) with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.59% of the fund’s average daily net assets. Under the Management Agreement, MFS will pay substantially all the fund’s operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), litigation expenses, the cost of proxy solicitations and shareholder meetings, the fee paid to MFS pursuant to this agreement, and such other expenses as approved by a majority of the fund’s Board of Trustees.

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly owned subsidiary of MFS, is the distributor of shares of the fund. The fund has adopted a plan in accordance with Rule 12b-1 under the Investment Company Act of 1940, as amended (the Distribution Plan). The fund’s Board of Trustees has determined not to implement payments of Rule 12b-1 fees under the Distribution Plan at this time. The fund does not currently pay compensation to MFD for any distribution services provided.

Administrator — MFS provides certain financial, legal, and other administrative services to the fund. MFS bears the costs of the services under the Management Agreement.

Trustees’ and Officers’ Compensation — Under the Management Agreement, MFS pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. MFS also pays compensation to Trustees or officers of the fund who are also officers of the investment adviser for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS and MFD. The fund did not pay any compensation to the independent Trustees for the six months ended August 31, 2026.

(4) Portfolio Securities

For the six months ended August 31, 2026, purchases and sales of investments, other than short-term obligations and in-kind transactions, aggregated $92,918,505 and $47,427,033, respectively. Securities received and delivered in-kind through subscriptions and redemptions aggregated $261,756,813 and $13,770,441, respectively.

(5) Purchase and Sales of Fund Shares

The fund issues and redeems shares through MFD at net asset value (“NAV”) only with Authorized Participants and only in large blocks of shares (each, a Creation Unit). An Authorized Participant may purchase or redeem a Creation Unit each business day that the fund is open in exchange for the delivery or receipt of a designated portfolio of in-kind securities and/or cash. Authorized Participants may pay a fixed purchase or redemption transaction fee to offset the transfer and other transaction costs associated with the issuance and redemption of Creation Units.  An additional variable fee may be charged for certain transactions. These variable fees are included in “Miscellaneous capital” in the Statement of Changes in Net Assets.

Individual fund shares may not be purchased or redeemed directly with the fund. Shares are listed for trading on the New York Stock Exchange, and individual fund shares may only be purchased and sold in the secondary market through a financial intermediary at market price. Because the fund’s shares will trade at market prices rather than NAV, shares may trade at prices greater than NAV (at a premium), at NAV, or less than NAV (at a discount). Transactions in fund shares were as follows: 

Six months ended

8/31/26

Year ended

2/28/26

Shares

Amount

Shares

Amount

Shares sold

9,900,000

$309,929,413

20,950,000

$610,111,983

Shares reacquired

(450,000

)

(14,610,880

)

(250,000

)

(6,986,000

)

Net change

9,450,000

$295,318,533

20,700,000

$603,125,983

12


ITEM 8. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active International ETF.

ITEM 9.  PROXY DISCLOSURES FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active International ETF.

ITEM 10. REMUNERATION PAID TO DIRECTORS, OFFICERS, AND OTHERS OF OPEN-END MANAGEMENT INVESTMENT COMPANIES.

This information is disclosed as part of the financial statements included in Item 7 above for MFS Active International ETF. See the Statement of Operations and Note 3 within the Notes to Financial Statements for more information.

ITEM 11. STATEMENT REGARDING BASIS FOR APPROVAL OF INVESTMENT ADVISORY CONTRACT.

13


MFS Active International ETF

Board Review of Investment Management Agreement

MFS Active International ETF

The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested (“independent”) Trustees, voting separately, annually approve the continuation of the Fund’s investment management agreement with MFS. The Trustees consider matters bearing on the Fund and its advisory arrangements at their meetings throughout the year, including a review of performance data at each regular meeting. In addition, the independent Trustees met several times over the course of several months beginning in April and ending in July, 2026 (“contract review meetings”) for the specific purpose of considering whether to approve the continuation of the investment management agreement for the Fund and the other investment companies that the Board oversees (the “MFS Funds”). The independent Trustees were assisted in their evaluation of the Fund’s investment management agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS during various contract review meetings. The independent Trustees were also assisted in this process by an independent consultant who was retained by and reported to the independent Trustees.

In connection with their deliberations regarding the continuation of the investment management agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant.  The investment management agreement for the Fund was considered separately, although the Trustees also took into account the common interests of all MFS Funds in their review. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services performed by MFS under the existing investment management agreement and other arrangements with the Fund. The independent Trustees considered that the Fund has a unitary management fee structure, pursuant to which MFS receives a fee covering investment management and administrative services, with MFS paying the Fund’s ordinary, recurring operating expenses (the “Unitary Fee”), subject to certain exceptions.

In connection with their contract review meetings, the Trustees received and relied upon materials that included, among other items: (i) information provided by Broadridge Financial Solutions, Inc. (“Broadridge”), an independent third party, on the investment performance of the Fund for the one-year period ended December 31, 2025 and the investment performance of a group of funds with substantially similar investment classifications/objectives (the “Broadridge performance universe”), (ii) information provided by Broadridge on the Fund’s Unitary Fee and the advisory fees and other expenses of comparable funds identified by Broadridge, as well as all other funds in the same investment classification/category (the “Broadridge expense group and universe”),  (iii) information provided by MFS on the advisory fees of portfolios of other clients of MFS, including institutional separate accounts, (iv) information regarding MFS’ financial results and financial condition, including MFS’ and certain of its affiliates’ estimated profitability from services performed for the Fund and the MFS Funds as a whole, and compared to MFS’ institutional business, (v) MFS’ views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vi) descriptions of various functions performed by MFS for the MFS Funds, such as compliance monitoring and portfolio trading practices, and (vii) information regarding the overall organization of MFS, including information about MFS’ senior management and other personnel providing investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative performance, fee and expense information prepared and provided by Broadridge was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS.

The Trustees’ conclusion as to the continuation of the investment management agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor.  Some of the factors that figured particularly in the Trustees’ deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors.  It is also important to recognize that the fee arrangements for the Fund and other MFS Funds are the result of years of review and discussion between the independent Trustees and MFS, that certain aspects of such arrangements may receive greater scrutiny in some years than in others, and that the Trustees’ conclusions may be based, in part, on their consideration of these same arrangements during the course of the year and in prior years.

Based on information provided by Broadridge and MFS, the Trustees reviewed the Fund’s total return investment performance as well as the Broadridge performance universe over the one-year period ended December 31, 2025. The total return performance of the Fund was in the 4th quintile relative to the other funds in the universe for this one-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers). The Fund commenced operations on December 5, 2024, and has a limited operating history and performance record; therefore, no performance data for the three- or five-year periods was available.  Because of the passage of time, these performance results may differ from the performance results for more recent periods, including those shown elsewhere in this report.

14


MFS Active International ETF

Board Review of Investment Management Agreement - continued

In the course of their deliberations, the Trustees took into account information provided by MFS in connection with the contract review meetings as well as during investment review meetings conducted with portfolio management personnel during the course of the year regarding the Fund’s performance. After reviewing these and related factors, the Trustees concluded, within the context of their overall conclusions regarding the investment management agreement, that they were satisfied with MFS’ responses and efforts relating to investment performance.

In assessing the reasonableness of the Fund’s Unitary Fee, the Trustees considered, among other things, information on unitary fee structures generally, as well as the terms of the investment management agreement and descriptions of various services performed or procured by MFS under the investment management agreement, including portfolio management and portfolio trading practices and administrative services. The Trustees considered the categories of expenses excluded from the Unitary Fee and therefore payable by the Fund. The Trustees also considered the Fund’s Unitary Fee as compared with the advisory fee and total expense ratios of the Broadridge expense group based on information provided by Broadridge. The Trustees considered that, according to the data provided by Broadridge, the Fund’s Unitary Fee and total expense ratio were each approximately at the applicable Broadridge expense group median.

The Trustees also considered the advisory fees charged by MFS to any institutional separate accounts advised by MFS (“separate accounts”) and unaffiliated investment companies for which MFS serves as subadviser (“subadvised funds”) that have comparable investment strategies to the Fund, if any.  In comparing these fees, the Trustees considered information provided by MFS as to the generally broader scope of services provided by MFS to the Fund, as well as the more extensive regulatory burdens imposed on MFS in managing the Fund, in comparison to separate accounts and subadvised funds.  The Trustees also considered the higher demands placed on MFS’ investment personnel and trading infrastructure as a result of the daily cash in-flows and out-flows of the Fund in comparison to separate accounts.

The Trustees considered that the investment management agreement provides for a unitary fee level that does not include pre-established breakpoints, and considered MFS’ observation that while fee waivers, breakpoints, and expense caps are common for mutual funds, these arrangements are not typically used by ETFs.

The Trustees also considered information prepared by MFS relating to MFS’ costs and profits with respect to the Fund, the MFS Funds considered as a group, and other investment companies and accounts advised by MFS, as well as MFS’ methodologies used to determine and allocate its costs to the MFS Funds, the Fund, and other accounts and products for purposes of estimating profitability.

After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the investment management agreement, that the Unitary Fee charged to the Fund represents reasonable compensation in light of the services being provided by MFS to the Fund.

In addition, the Trustees considered MFS’ resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund.  The Trustees also considered current and developing conditions in the financial services industry, including the presence of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies.  In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc.  The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser that also serves other investment companies as well as other accounts.

The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services provided to the Fund by MFS and its affiliates under agreements and plans other than the investment management agreement. The Trustees also considered the nature, extent and quality of certain other services MFS may perform or arrange for on the Fund’s behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS’ interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services provided by MFS and its affiliates on behalf of the Fund were satisfactory.

The Trustees considered so-called “fall-out benefits” to MFS such as reputational value derived from serving as investment manager to the MFS Funds. The Trustees also considered that MFS discontinued its historic practice of obtaining investment research from portfolio brokerage commissions paid by certain MFS Funds effective January 2018, and directly pays or voluntarily reimburses a Fund, if applicable, for the costs of external research acquired through the use of the Fund’s portfolio brokerage commissions.

Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including the independent Trustees, concluded that the Fund’s investment management agreement with MFS should be continued for an additional one-year period, commencing August 1, 2026.

15


MFS Blended Research Core Equity ETF

ITEM 7.  FINANCIAL STATEMENTS AND FINANCIAL HIGHLIGHTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

MFS Blended Research Core Equity ETF

Portfolio of Investments − 8/31/26 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

Issuer

Shares/Par

Value ($)

Common Stocks – 99.6%

Aerospace & Defense – 2.1%

Curtiss-Wright Corp.

132

$76,894

General Dynamics Corp.

1,382

513,206

Howmet Aerospace, Inc.

577

141,336

Textron, Inc.

720

58,003

$789,439

Auto & Auto Components – 0.6%

Aptiv PLC (a)

1,213

$54,294

Tesla, Inc. (a)

472

173,672

$227,966

Brokerage & Asset Managers – 2.9%

Ameriprise Financial, Inc.

850

$470,144

Northern Trust Corp.

3,177

589,524

$1,059,668

Business Services – 0.3%

Cognizant Technology Solutions Corp., “A”

550

$35,519

GoDaddy, Inc. (a)

439

42,969

Verisk Analytics, Inc., “A”

197

38,175

$116,663

Chemicals – 0.2%

Albemarle Corp.

512

$69,105

Construction – 0.2%

CRH PLC

885

$83,447

Consumer Products – 1.3%

Colgate-Palmolive Co.

5,541

$497,693

Consumer Services – 0.5%

Airbnb, Inc., “A” (a)

479

$87,762

Uber Technologies, Inc. (a)

1,280

96,832

$184,594

Containers – 0.3%

Smurfit Westrock PLC

2,316

$108,620

Diversified Financial Services – 3.8%

Mastercard, Inc., “A”

1,309

$771,407

Visa, Inc., “A”

1,670

633,548

$1,404,955

EBCFS-SEM

1


MFS Blended Research Core Equity ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Electrical Equipment – 0.9%

Amphenol Corp., “A”

1,814

$287,610

Eaton Corp. PLC

100

40,188

$327,798

Energy - Independent – 3.0%

ConocoPhillips

797

$105,595

ExxonMobil Holdings Corp.

1,334

214,707

Marathon Petroleum Corp.

504

188,153

Valero Energy Corp.

1,715

615,548

$1,124,003

Energy - Renewables – 1.4%

GE Vernova, Inc.

594

$533,727

Engineering - Construction – 0.5%

Jacobs Solutions, Inc.

1,136

$169,321

Food & Beverages – 1.5%

Monster Worldwide, Inc. (a)

11,528

$529,366

PepsiCo, Inc.

150

21,051

$550,417

Global Systemically Important Banks – 2.8%

Bank of America Corp.

5,788

$358,509

Citigroup, Inc.

4,114

541,485

JPMorgan Chase & Co.

326

116,062

$1,016,056

Hardware, Peripherals, & Assembly – 11.8%

Apple, Inc.

8,134

$2,577,258

Arista Networks, Inc. (a)

2,464

482,180

Hewlett Packard Enterprise

1,276

66,658

Micron Technology, Inc.

840

805,333

Sandisk Corp. of Delaware (a)

148

231,872

Seagate Technology Holdings PLC

267

221,178

$4,384,479

Health Maintenance Organizations – 1.5%

Centene Corp. (a)

886

$57,005

Cigna Group

1,320

364,425

Humana, Inc.

320

122,634

$544,064

Insurance – 2.2%

Berkshire Hathaway, Inc., “B” (a)

274

$138,104

Chubb Ltd.

450

152,370

Equitable Holdings, Inc.

6,650

333,364

Everest Group Ltd.

530

198,565

$822,403

2


MFS Blended Research Core Equity ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Interactive Media Services – 6.3%

Alphabet, Inc., “A”

2,955

$1,002,779

Alphabet, Inc., “C”

1,964

658,745

Meta Platforms, Inc., “A”

1,201

687,381

$2,348,905

Machinery & Tools – 2.3%

Caterpillar, Inc.

533

$425,052

Trane Technologies PLC

958

425,735

$850,787

Media – 1.4%

Netflix, Inc. (a)

3,286

$266,330

Spotify Technology S.A. (a)

200

108,724

TKO Group Holdings, Inc.

785

143,349

$518,403

Medical & Health Technology & Services – 0.2%

McKesson Corp.

79

$69,940

Medical Equipment – 1.6%

DexCom, Inc. (a)

4,006

$364,786

Medtronic PLC

1,663

150,751

Thermo Fisher Scientific, Inc.

146

90,097

$605,634

Metals & Mining – 0.7%

Freeport-McMoRan, Inc.

1,855

$140,498

Newmont Corp.

971

122,404

$262,902

Network & Telecom – 0.2%

Qualcomm, Inc.

507

$86,433

Non-Global Systemically Important Banks – 1.2%

PNC Financial Services Group, Inc.

372

$89,142

Popular, Inc.

1,583

266,245

UMB Financial Corp.

484

68,549

$423,936

Oil Services – 0.8%

TechnipFMC PLC

3,550

$277,432

Pharmaceuticals & Biotechnology – 6.9%

AbbVie, Inc.

883

$226,419

Biogen, Inc. (a)

177

38,347

Bristol-Myers Squibb Co.

4,839

323,294

Eli Lilly & Co.

66

76,344

Gilead Sciences, Inc.

2,758

403,606

Johnson & Johnson

3,261

866,937

Pfizer, Inc.

20,998

597,603

Vertex Pharmaceuticals, Inc. (a)

37

20,147

$2,552,697

3


MFS Blended Research Core Equity ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Real Estate – 0.8%

CBRE Group, Inc., “A” (a)

615

$89,673

W.P. Carey, Inc., REIT

2,801

195,958

$285,631

Real Estate - Storage & Office – 0.3%

Prologis, Inc., REIT

734

$102,701

Restaurants – 0.8%

Aramark

5,474

$308,241

Retail & E-commerce – 5.8%

Amazon.com, Inc. (a)

5,833

$1,515,238

Dollar General Corp.

2,225

282,019

O'Reilly Automotive, Inc. (a)

1,810

160,728

TJX Cos., Inc.

1,376

184,260

$2,142,245

Semiconductor & Electronic Components – 14.5%

Advanced Micro Devices (a)

615

$289,493

Applied Materials, Inc.

202

92,595

Broadcom, Inc.

2,372

878,446

Intel Corp. (a)

664

59,434

KLA Corp.

1,231

215,979

Lam Research Corp.

1,296

390,731

NVIDIA Corp.

15,637

3,452,337

$5,379,015

Software – 10.8%

Autodesk, Inc. (a)

1,430

$369,698

Datadog, Inc., “A” (a)

242

57,364

Microsoft Corp.

3,654

1,853,638

Okta, Inc. (a)

1,171

202,630

Palantir Technologies, Inc. (a)

2,108

392,889

Salesforce, Inc.

3,173

817,174

Snowflake, Inc., “A” (a)

571

189,246

Zoom Communications, Inc. (a)

1,201

116,113

$3,998,752

Telecom Services – 0.9%

EchoStar Corp., “A” (a)

1,263

$109,174

Space Exploration Technologies, “A” (a)

1,286

184,785

T-Mobile USA, Inc.

194

35,005

$328,964

Tobacco – 1.5%

Philip Morris International, Inc.

2,977

$557,592

Transportation & Logistics – 1.3%

Union Pacific Corp.

1,564

$470,248

Travel, Gaming, & Lodging – 1.4%

Viking Holdings Ltd. (a)

5,892

$507,537

4


MFS Blended Research Core Equity ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Utilities – 2.1%

Atmos Energy Corp.

291

$48,344

Edison International

6,914

373,218

PG&E Corp.

28,028

371,931

$793,493

Total Common Stocks (Identified Cost, $32,596,229)

$36,885,906

Mutual Funds – 0.3%

Money Market Funds – 0.3%

State Street Institutional U.S. Government Money Market Fund - Premier Class, 3.62% (j) (Identified Cost, $112,116)

112,116

$112,116

Other Assets, Less Liabilities – 0.1%

26,125

Net Assets – 100.0%

$37,024,147

(a)

Non-income producing security.

(j)

The rate quoted is the annualized seven-day yield of the fund at period end.

The following abbreviations are used in this report and are defined:

REIT

Real Estate Investment Trust

See Notes to Financial Statements

5


MFS Blended Research Core Equity ETF

Financial Statements | Statement of Assets and Liabilities

This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund. 

At 8/31/26 (unaudited)

Assets

Investments in unaffiliated issuers, at value (identified cost, $32,708,345)

$36,998,022

Receivables for

Interest and dividends

27,133

Total assets

$37,025,155

Liabilities

Payables for

Net daily variation margin on open futures contracts

$22

Payable to affiliates

Investment adviser

986

Total liabilities

$1,008

Net assets

$37,024,147

Net assets consist of

Paid-in capital

$31,794,244

Total distributable earnings (loss)

5,229,903

Net assets

$37,024,147

Shares of beneficial interest outstanding (unlimited number of shares authorized)

1,225,000

Net asset value per share (net assets of $37,024,147 / 1,225,000 shares of beneficial interest outstanding)

$30.22

See Notes to Financial Statements

6


MFS Blended Research Core Equity ETF

Financial Statements | Statement of Operations

This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. 

Six months ended 8/31/26 (unaudited)

Net investment income (loss)

Income

Dividends from unaffiliated issuers

$174,425

Other

244

Income on securities loaned

129

Total investment income

$174,798

Expenses

Management fee

$39,882

Miscellaneous

34

Total expenses

$39,916

Net investment income (loss)

$134,882

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers

$(10,269

)

Futures contracts

(8,795

)

In-kind redemptions – unaffiliated issuers

932,321

Net realized gain (loss)

$913,257

Change in unrealized appreciation or depreciation

Unaffiliated issuers

$3,397,417

Net realized and unrealized gain (loss)

$4,310,674

Change in net assets from operations

$4,445,556

See Notes to Financial Statements

7


MFS Blended Research Core Equity ETF

Financial Statements |  Statements of Changes in Net Assets

These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. 

Six months ended

Year ended


8/31/26

(unaudited)


2/28/26(c)

Change in net assets

From operations

Net investment income (loss)

$134,882

$84,993

Net realized gain (loss)

913,257

287,262

Net unrealized gain (loss)

3,397,417

892,260

Change in net assets from operations

$4,445,556

$1,264,515

Total distributions to shareholders

$(119,814

)

$(54,000

)

Change in net assets from fund share transactions

$2,191,160

$29,296,730

Total change in net assets

$6,516,902

$30,507,245

Net assets

At beginning of period

30,507,245

—

At end of period

$37,024,147

$30,507,245

(c)

For the period from the commencement of the fund’s investment operations, October 22, 2025, through the stated period end.

See Notes to Financial Statements

8


MFS Blended Research Core Equity ETF

Financial Statements | Financial Highlights

The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years (or life of the fund, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund (assuming reinvestment of all distributions) held for the entire period. 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26 (c)

Net asset value, beginning of period

$26.53

$25.44

Income (loss) from investment operations

Net investment income (loss) (d)

$0.12

$0.08

Net realized and unrealized gain (loss)

3.67

1.06

Total from investment operations

$3.79

$1.14

Less distributions declared to shareholders

From net investment income

$(0.10

)

$(0.05

)

Net asset value, end of period (x)

$30.22

$26.53

Total return (%) (s)(x)

14.37

(n)

4.48

(n)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses

0.24

(a)

0.24

(a)

Net investment income (loss)

0.81

(a)

0.85

(a)

Portfolio turnover rate (e)

19

(n)

5

(n)

Net assets at end of period (000 omitted)

$37,024

$30,507

(a)

Annualized.

(c)

For the period from the commencement of the fund’s investment operations, October 22, 2025, through the stated period end.

(d)

Per share data is based on average shares outstanding.

(e)

Portfolio turnover rate excludes securities received or delivered in-kind in the process of creating or redeeming fund shares.

(n)

Not annualized.

(s)

From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.

(x)

The net asset value and total return have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted

accounting principles required at period end for financial reporting purposes.

See Notes to Financial Statements

9


MFS Blended Research Core Equity ETF

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS Blended Research Core Equity ETF (the fund) is a diversified series of MFS Active Exchange Traded Funds Trust (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

(2) Significant Accounting Policies

General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued.

Segment Reporting — An operating segment is defined in FASB Accounting Standards Codification Topic 280, Segment Reporting as a component of a public entity that engages in business activities from which it may recognize revenues and incur expenses, has operating results that are regularly reviewed by the entity’s chief operating decision maker (CODM) in making resource allocation decisions and assessing segment performance, and for which discrete financial information is available. The fund represents a single operating segment and the Chairman’s Committee of the fund's adviser acts as the segment’s CODM. The fund’s total returns, expense ratios, and changes in net assets which are used by the CODM to assess segment performance and to make resource allocation decisions to the segment are consistent with that presented within the fund’s financial statements.

Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.

Investment Valuations — Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.

Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Futures contracts are generally valued at last posted settlement price on their primary exchange as provided by a third-party pricing service. Futures contracts for which there were no trades that day for a particular position are generally valued at the closing bid quotation on their primary exchange as provided by a third-party pricing service. Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data.

10


MFS Blended Research Core Equity ETF

Notes to Financial Statements (unaudited) - continued 

An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of August 31, 2026 in valuing the fund's assets and liabilities:

Financial Instruments

Level 1

Level 2

Level 3

Total

Equity Securities

$36,885,906

$—

$—

$36,885,906

Investment Companies

112,116

—

—

112,116

Total

$36,998,022

$—

$—

$36,998,022

For further information regarding security characteristics, see the Portfolio of Investments.

Derivatives — The fund uses derivatives primarily to increase or decrease exposure to a particular market or segment of the market, or security, to increase or decrease interest rate or currency exposure, or as alternatives to direct investments. Derivatives are used for hedging or non-hedging purposes. While hedging can reduce or eliminate losses, it can also reduce or eliminate gains. When the fund uses derivatives as an investment to increase market exposure, or for hedging purposes, gains and losses from derivative instruments may be substantially greater than the derivative’s original cost.

The derivative instruments used by the fund during the period were futures contracts. Depending on the type of derivative, a fund may exit a derivative position by entering into an offsetting transaction with a counterparty or exchange, negotiating an agreement with the derivative counterparty, or novating the position to a third party. The fund's period end derivatives, as presented in the Portfolio of Investments and the associated Derivative Contract tables, generally are indicative of the volume of its derivative activity during the period.

The following table presents, by major type of derivative contract, the realized gain (loss) on derivatives held by the fund for the six months ended August 31, 2026 as reported in the Statement of Operations: 

Risk

Futures

Contracts

Equity

$(8,795

)

Derivative counterparty credit risk is managed through formal evaluation of the creditworthiness of all potential counterparties. On certain, but not all, uncleared derivatives, the fund attempts to reduce its exposure to counterparty credit risk whenever possible by entering into an ISDA Master Agreement on a bilateral basis. The ISDA Master Agreement gives each party to the agreement the right to terminate all transactions traded under such agreement if there is a specified deterioration in the credit quality of the other party. Upon an event of default or a termination of the ISDA Master Agreement, the non-defaulting party has the right to close out all transactions traded under such agreement and to net amounts owed under each agreement to one net amount payable by one party to the other. This right to close out and net payments across all transactions traded under the ISDA Master Agreement could result in a reduction of the fund's credit risk to such counterparty equal to any amounts payable by the fund under the applicable transactions, if any.

Collateral and margin requirements differ by type of derivative. For exchange-traded and cleared derivatives (e.g., futures contracts, cleared swaps, and exchange-traded options), margin requirements are set by the exchange or clearing broker and the clearing house and collateral, in the form of cash or securities, is posted by the fund directly with the exchange or clearing broker. Collateral terms

11


MFS Blended Research Core Equity ETF

Notes to Financial Statements (unaudited) - continued 

are counterparty agreement specific for uncleared derivatives (e.g., forward foreign currency exchange contracts, uncleared swap agreements, and uncleared options). Collateral, in the form of cash and securities, is held in segregated accounts with the fund's custodian in connection with these agreements. For derivatives traded under an ISDA Master Agreement, which contains a credit support annex, the collateral requirements are netted across all transactions traded under such counterparty-specific agreement and an amount is posted from one party to the other to collateralize such obligations. Cash that has been segregated or delivered to brokers to cover the fund's collateral or margin obligations under derivative contracts, if any, will be reported separately in the Statement of Assets and Liabilities as cash collateral posted for uncleared derivatives and/or cash pledged for exchange-traded or cleared derivatives. Securities pledged as collateral or margin for the same purpose, if any, are noted in the Portfolio of Investments. The fund may be required to make payments of interest on uncovered collateral or margin obligations with the broker. Any such payments are included in “Miscellaneous” expense in the Statement of Operations.

Futures Contracts — The fund entered into futures contracts which may be used to hedge against or obtain broad market exposure, interest rate exposure, or to manage duration. A futures contract represents a commitment for the future purchase or sale of an asset at a specified price on a specified date.

Upon entering into a futures contract, the fund is required to deposit with the broker, either in cash or securities, an initial margin in an amount equal to a specified percentage of the notional amount of the contract. Subsequent payments (variation margin) are made or received by the fund each day, depending on the daily fluctuations in the value of the contract, and are recorded for financial statement purposes as unrealized gain or loss by the fund until the contract is closed or expires at which point the gain or loss on futures contracts is realized.

The fund bears the risk of interest rates or securities prices moving unexpectedly, in which case, the fund may not achieve the anticipated benefits of the futures contracts and may realize a loss. While futures contracts may present less counterparty risk to the fund since the contracts are exchange traded and the exchange’s clearinghouse guarantees payments to the broker, there is still counterparty credit risk due to the insolvency of the broker. The fund's maximum risk of loss due to counterparty credit risk is equal to the margin posted by the fund to the broker plus any gains or minus any losses on the outstanding futures contracts.

Security Loans — Under its Securities Lending Agency Agreement with the fund, Goldman Sachs Agency Lending, as lending agent, loans the securities of the fund to certain qualified institutions (the “Borrowers”) approved by the fund. Security loans can be terminated at the discretion of either the lending agent or the fund and the related securities must be returned within the earlier of the standard trade settlement period for such securities or within five business days. The loans are collateralized by cash and/or U.S. government securities in an amount typically at least equal to the market value of the securities loaned. On loans collateralized by cash, the cash collateral is invested in a money market fund. The market value of the loaned securities is determined at the close of business of the fund and any additional required collateral is delivered to the fund on the next business day. The lending agent provides the fund with indemnification against Borrower default. In the event of Borrower default, the lending agent will, for the benefit of the fund, either purchase securities identical to those loaned or pay the fund the market value of the loaned securities. In return, the lending agent assumes the fund's rights to the related collateral. If the collateral value is less than the cost to purchase identical securities or the cash needed to pay their market value, the lending agent is responsible for the shortfall, but only to the extent that such shortfall is not due to a decline in collateral value resulting from collateral reinvestment for which the fund bears the risk of loss. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. government securities, a fee is received from the Borrower, and is allocated between the fund and the lending agent. Income from securities lending is separately reported in the Statement of Operations. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income. At August 31, 2026, there were no securities on loan or collateral outstanding.

Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.

Investment Transactions and Income —  Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend payments received in additional securities are recorded on the ex-dividend date in an amount equal to the value of the security on such date.

The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.

12


MFS Blended Research Core Equity ETF

Notes to Financial Statements (unaudited) - continued 

Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.

Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for generally a three-year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.

Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.

Book/tax differences primarily relate to redemptions in-kind.

The tax character of distributions made during the current period will be determined at fiscal year end. The tax character of distributions declared to shareholders for the last fiscal year is as follows: 

Year ended

2/28/26 (c)

Ordinary income (including any short-term capital gains)

$54,000

(c)

For the period from the commencement of the fund’s investment operations, October 22, 2025, through the stated period end.

The federal tax cost and the tax basis components of distributable earnings were as follows: 

As of 8/31/26

Cost of investments

$32,710,352

Gross appreciation

5,038,936

Gross depreciation

(751,266

)

Net unrealized appreciation (depreciation)

$4,287,670

As of 2/28/26

Undistributed ordinary income

30,993

Capital loss carryforwards

(17,085

)

Net unrealized appreciation (depreciation)

890,253

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

As of February 28, 2026, the fund had capital loss carryforwards available to offset future realized gains. These net capital losses may be carried forward indefinitely and their character is retained as short-term and/or long-term losses. Such losses are characterized as follows: 

Short-Term

$(17,085

)

(3) Transactions with Affiliates

Investment Adviser — The fund has an Investment Management Agreement (“Management Agreement”) with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.24% of the fund’s average daily net assets. Under the Management Agreement, MFS will pay substantially all the fund’s operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), litigation expenses, the cost of proxy solicitations and shareholder meetings, the fee paid to MFS pursuant to this agreement, and such other expenses as approved by a majority of the fund’s Board of Trustees.

13


MFS Blended Research Core Equity ETF

Notes to Financial Statements (unaudited) - continued 

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly owned subsidiary of MFS, is the distributor of shares of the fund. The fund has adopted a plan in accordance with Rule 12b-1 under the Investment Company Act of 1940, as amended (the Distribution Plan). The fund’s Board of Trustees has determined not to implement payments of Rule 12b-1 fees under the Distribution Plan at this time. The fund does not currently pay compensation to MFD for any distribution services provided.

Administrator — MFS provides certain financial, legal, and other administrative services to the fund. MFS bears the costs of the services under the Management Agreement.

Trustees’ and Officers’ Compensation — Under the Management Agreement, MFS pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. MFS also pays compensation to Trustees or officers of the fund who are also officers of the investment adviser for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS and MFD. The fund did not pay any compensation to the independent Trustees for the six months ended August 31, 2026.

Other — At August 31, 2026, MFS held approximately 85% of the outstanding shares of the fund.

The adviser has voluntarily undertaken to reimburse the fund from its own resources on a quarterly basis for the cost of investment research embedded in the cost of the fund’s securities trades. This agreement may be rescinded at any time. For the period ended August 31, 2026, this reimbursement amounted to $244, which is included in “Other” income in the Statement of Operations.

(4) Portfolio Securities

For the six months ended August 31, 2026, purchases and sales of investments, other than short-term obligations and in-kind transactions, aggregated $9,477,962 and $6,182,871, respectively. Securities received and delivered in-kind through subscriptions and redemptions aggregated $2,852,408 and $3,974,297, respectively.

(5) Purchase and Sales of Fund Shares

The fund issues and redeems shares through MFD at net asset value (“NAV”) only with Authorized Participants and only in large blocks of shares (each, a Creation Unit). An Authorized Participant may purchase or redeem a Creation Unit each business day that the fund is open in exchange for the delivery or receipt of a designated portfolio of in-kind securities and/or cash. Authorized Participants may pay a fixed purchase or redemption transaction fee to offset the transfer and other transaction costs associated with the issuance and redemption of Creation Units. 

Individual fund shares may not be purchased or redeemed directly with the fund. Shares are listed for trading on the New York Stock Exchange, and individual fund shares may only be purchased and sold in the secondary market through a financial intermediary at market price. Because the fund’s shares will trade at market prices rather than NAV, shares may trade at prices greater than NAV (at a premium), at NAV, or less than NAV (at a discount). Transactions in fund shares were as follows: 

Six months ended

8/31/26

Year ended

2/28/26 (c)

Shares

Amount

Shares

Amount

Shares sold

250,000

$7,155,092

1,250,002

$31,954,868

Shares reacquired

(175,000

)

(4,963,932

)

(100,002

)

(2,658,138

)

Net change

75,000

$2,191,160

1,150,000

$29,296,730

(c)

For the period from the commencement of the fund’s investment operations, October 22, 2025, through the stated period end.

14


ITEM 8. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Blended Research Core Equity ETF.

ITEM 9.  PROXY DISCLOSURES FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Blended Research Core Equity ETF.

ITEM 10. REMUNERATION PAID TO DIRECTORS, OFFICERS, AND OTHERS OF OPEN-END MANAGEMENT INVESTMENT COMPANIES.

This information is disclosed as part of the financial statements included in Item 7 above for MFS Blended Research Core Equity ETF. See the Statement of Operations and Note 3 within the Notes to Financial Statements for more information.

ITEM 11. STATEMENT REGARDING BASIS FOR APPROVAL OF INVESTMENT ADVISORY CONTRACT.

Not Applicable.

15


MFS Active Value ETF

ITEM 7.  FINANCIAL STATEMENTS AND FINANCIAL HIGHLIGHTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

MFS Active Value ETF

Portfolio of Investments − 8/31/26 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

Issuer

Shares/Par

Value ($)

Common Stocks – 98.9%

Aerospace & Defense – 6.0%

Boeing Co. (a)

51,499

$10,700,462

General Dynamics Corp.

26,056

9,675,896

Honeywell Aerospace, Inc. (a)

13,395

2,117,883

RTX Corp.

66,631

13,841,258

$36,335,499

Brokerage & Asset Managers – 2.3%

KKR & Co., Inc.

93,729

$10,283,946

LPL Financial Holdings, Inc.

10,251

3,794,254

$14,078,200

Business Services – 1.4%

Equifax, Inc.

44,269

$8,373,924

Conglomerates – 0.9%

Honeywell International, Inc.

24,814

$5,298,533

Construction – 0.8%

CRH PLC

52,245

$4,926,181

Consumer Products – 2.1%

Kimberly-Clark Corp.

54,288

$5,860,389

Procter & Gamble Co.

48,107

6,981,288

$12,841,677

Diversified Financial Services – 1.8%

NASDAQ, Inc.

109,464

$10,794,245

Electrical Equipment – 1.5%

Eaton Corp. PLC

22,465

$9,028,234

Energy - Independent – 6.9%

Chevron Corp.

62,156

$12,812,838

ConocoPhillips

89,606

11,871,899

ExxonMobil Holdings Corp.

106,114

17,079,048

$41,763,785

Food & Beverages – 1.5%

Coca-Cola Europacific Partners PLC

29,352

$3,170,603

Mondelez International, Inc.

93,669

5,814,035

$8,984,638

Global Systemically Important Banks – 10.8%

Bank of America Corp.

223,031

$13,814,540

JPMorgan Chase & Co.

75,528

26,889,479

Morgan Stanley

61,643

13,149,685

EVEFS-SEM

1


MFS Active Value ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Global Systemically Important Banks – continued

Wells Fargo & Co.

128,570

$11,107,162

$64,960,866

Hardware, Peripherals, & Assembly – 2.9%

Apple, Inc.

55,064

$17,447,028

Health Maintenance Organizations – 4.1%

Cigna Group

56,255

$15,530,881

Elevance Health, Inc.

11,119

4,364,652

Humana, Inc.

12,383

4,745,537

$24,641,070

Insurance – 6.7%

Aon PLC

30,738

$9,882,882

Hartford Insurance Group, Inc.

64,183

8,817,460

Progressive Corp.

51,445

11,219,126

Travelers Cos., Inc.

27,577

10,091,252

$40,010,720

Interactive Media Services – 0.8%

Alphabet, Inc., “A”

14,051

$4,768,207

Machinery & Tools – 2.6%

Ingersoll Rand, Inc.

105,349

$8,117,141

PACCAR, Inc.

59,179

7,345,889

$15,463,030

Medical & Health Technology & Services – 1.8%

McKesson Corp.

12,121

$10,730,964

Medical Equipment – 4.1%

Abbott Laboratories

112,708

$12,438,455

Boston Scientific Corp. (a)

121,012

5,844,879

Medline, Inc., “A” (a)

79,039

2,768,736

STERIS PLC

15,723

3,657,799

$24,709,869

Non-Global Systemically Important Banks – 1.6%

American Express Co.

29,473

$9,731,100

Pharmaceuticals & Biotechnology – 4.4%

AbbVie, Inc.

33,142

$8,498,271

Johnson & Johnson

36,695

9,755,366

Pfizer, Inc.

281,193

8,002,753

$26,256,390

Real Estate - Storage & Office – 1.6%

Prologis, Inc., REIT

69,257

$9,690,439

2


MFS Active Value ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Retail & E-commerce – 7.6%

Amazon.com, Inc. (a)

125,530

$32,608,928

eBay, Inc.

46,509

4,816,472

Home Depot, Inc.

26,098

8,555,708

$45,981,108

Semiconductor & Electronic Components – 5.4%

Analog Devices, Inc.

30,664

$11,104,661

KLA Corp.

51,578

9,049,360

NXP Semiconductors N.V.

34,226

7,688,529

Texas Instruments, Inc.

17,431

4,547,922

$32,390,472

Software – 6.4%

Microsoft Corp.

63,610

$32,268,717

Salesforce, Inc.

24,151

6,219,849

$38,488,566

Tobacco – 1.0%

Philip Morris International, Inc.

31,748

$5,946,400

Transportation & Logistics – 1.9%

Union Pacific Corp.

37,387

$11,241,149

Travel, Gaming, & Lodging – 1.6%

Hilton Worldwide Holdings, Inc.

30,131

$9,529,833

Utilities – 8.4%

Alliant Energy Corp.

123,870

$8,420,683

CMS Energy Corp.

80,721

5,493,871

Dominion Energy, Inc.

153,174

10,111,016

Duke Energy Corp.

97,829

11,730,675

Southern Co.

92,010

8,096,880

Xcel Energy, Inc.

87,213

6,601,152

$50,454,277

Total Common Stocks (Identified Cost, $548,834,556)

$594,866,404

Mutual Funds – 0.9%

Money Market Funds – 0.9%

State Street Institutional U.S. Government Money Market Fund - Premier Class, 3.62% (j) (Identified Cost, $5,224,361)

5,224,361

$5,224,361

Other Assets, Less Liabilities – 0.2%

1,034,026

Net Assets – 100.0%

$601,124,791

(a)

Non-income producing security.

(j)

The rate quoted is the annualized seven-day yield of the fund at period end.

The following abbreviations are used in this report and are defined:

REIT

Real Estate Investment Trust

See Notes to Financial Statements

3


MFS Active Value ETF

Financial Statements | Statement of Assets and Liabilities

This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund. 

At 8/31/26 (unaudited)

Assets

Investments in unaffiliated issuers, at value (identified cost, $554,058,917)

$600,090,765

Receivables for

Investments sold

2,706,655

Dividends

962,616

Total assets

$603,760,036

Liabilities

Payables for

Investments purchased

$2,607,078

Payable to affiliates

Investment adviser

28,167

Total liabilities

$2,635,245

Net assets

$601,124,791

Net assets consist of

Paid-in capital

$549,912,157

Total distributable earnings (loss)

51,212,634

Net assets

$601,124,791

Shares of beneficial interest outstanding (unlimited number of shares authorized)

20,375,000

Net asset value per share (net assets of $601,124,791 / 20,375,000 shares of beneficial interest outstanding)

$29.50

See Notes to Financial Statements

4


MFS Active Value ETF

Financial Statements | Statement of Operations

This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. 

Six months ended 8/31/26 (unaudited)

Net investment income (loss)

Income

Dividends from unaffiliated issuers

$4,368,981

Other

1,582

Foreign taxes withheld

(8,879

)

Total investment income

$4,361,684

Expenses

Management fee

$1,057,762

Total expenses

$1,057,762

Net investment income (loss)

$3,303,922

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers

$(3,305,927

)

In-kind redemptions – unaffiliated issuers

8,077,090

Net realized gain (loss)

$4,771,163

Change in unrealized appreciation or depreciation

Unaffiliated issuers

$25,938,239

Net realized and unrealized gain (loss)

$30,709,402

Change in net assets from operations

$34,013,324

See Notes to Financial Statements

5


MFS Active Value ETF

Financial Statements |  Statements of Changes in Net Assets

These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. 

Six months ended

Year ended


8/31/26

(unaudited)


2/28/26

Change in net assets

From operations

Net investment income (loss)

$3,303,922

$2,509,992

Net realized gain (loss)

4,771,163

413,656

Net unrealized gain (loss)

25,938,239

18,867,271

Change in net assets from operations

$34,013,324

$21,790,919

Total distributions to shareholders

$(3,253,161

)

$(1,551,608

)

Change in net assets from fund share transactions

$284,593,577

$216,085,287

Total change in net assets

$315,353,740

$236,324,598

Net assets

At beginning of period

285,771,051

49,446,453

At end of period

$601,124,791

$285,771,051

See Notes to Financial Statements

6


MFS Active Value ETF

Financial Statements | Financial Highlights

The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years (or life of the fund, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund (assuming reinvestment of all distributions) held for the entire period. 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25 (c)

Net asset value, beginning of period

$28.09

$25.36

$24.90

Income (loss) from investment operations

Net investment income (loss) (d)

$0.20

$0.57

$0.13

Net realized and unrealized gain (loss)

1.41

2.57

0.36

Total from investment operations

$1.61

$3.14

$0.49

Less distributions declared to shareholders

From net investment income

$(0.20

)

$(0.41

)

$(0.03

)

Net asset value, end of period (x)

$29.50

$28.09

$25.36

Total return (%) (s)(x)

5.82

(n)

12.54

1.96

(n)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses

0.44

(a)

0.44

0.44

(a)

Net investment income (loss)

1.37

(a)

2.16

2.31

(a)

Portfolio turnover rate (e)

24

(n)

10

2

(n)

Net assets at end of period (000 omitted)

$601,125

$285,771

$49,446

(a)

Annualized.

(c)

For the period from the commencement of the fund’s investment operations, December 5, 2024, through the stated period end.

(d)

Per share data is based on average shares outstanding.

(e)

Portfolio turnover rate excludes securities received or delivered in-kind in the process of creating or redeeming fund shares.

(n)

Not annualized.

(s)

From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.

(x)

The net asset value and total return have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted

accounting principles required at period end for financial reporting purposes.

See Notes to Financial Statements

7


MFS Active Value ETF

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS Active Value ETF (the fund) is a diversified series of MFS Active Exchange Traded Funds Trust (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

(2) Significant Accounting Policies

General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued.

Segment Reporting — An operating segment is defined in FASB Accounting Standards Codification Topic 280, Segment Reporting as a component of a public entity that engages in business activities from which it may recognize revenues and incur expenses, has operating results that are regularly reviewed by the entity’s chief operating decision maker (CODM) in making resource allocation decisions and assessing segment performance, and for which discrete financial information is available. The fund represents a single operating segment and the Chairman’s Committee of the fund's adviser acts as the segment’s CODM. The fund’s total returns, expense ratios, and changes in net assets which are used by the CODM to assess segment performance and to make resource allocation decisions to the segment are consistent with that presented within the fund’s financial statements.

Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.

Investment Valuations — Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.

Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading

8


MFS Active Value ETF

Notes to Financial Statements (unaudited) - continued 

does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of August 31, 2026 in valuing the fund's assets and liabilities:

Financial Instruments

Level 1

Level 2

Level 3

Total

Equity Securities

$594,866,404

$—

$—

$594,866,404

Investment Companies

5,224,361

—

—

5,224,361

Total

$600,090,765

$—

$—

$600,090,765

For further information regarding security characteristics, see the Portfolio of Investments.

Foreign Currency Translation — Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions or on the reporting date for foreign denominated receivables and payables. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on receivables, payables, income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed.

Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.

Investment Transactions and Income —  Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend payments received in additional securities are recorded on the ex-dividend date in an amount equal to the value of the security on such date.

The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.

Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.

Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for generally a three-year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.

9


MFS Active Value ETF

Notes to Financial Statements (unaudited) - continued 

Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.

Book/tax differences primarily relate to redemptions in-kind.

The tax character of distributions made during the current period will be determined at fiscal year end. The tax character of distributions declared to shareholders for the last fiscal year is as follows: 

Year ended

2/28/26

Ordinary income (including any short-term capital gains)

$1,551,608

The federal tax cost and the tax basis components of distributable earnings were as follows: 

As of 8/31/26

Cost of investments

$554,060,895

Gross appreciation

54,259,134

Gross depreciation

(8,229,264

)

Net unrealized appreciation (depreciation)

$46,029,870

As of 2/28/26

Undistributed ordinary income

1,115,203

Capital loss carryforwards

(754,363

)

Net unrealized appreciation (depreciation)

20,091,631

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

As of February 28, 2026, the fund had capital loss carryforwards available to offset future realized gains. These net capital losses may be carried forward indefinitely and their character is retained as short-term and/or long-term losses. Such losses are characterized as follows: 

Short-Term

$(754,363

)

(3) Transactions with Affiliates

Investment Adviser — The fund has an Investment Management Agreement (“Management Agreement”) with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.44% of the fund’s average daily net assets. Under the Management Agreement, MFS will pay substantially all the fund’s operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), litigation expenses, the cost of proxy solicitations and shareholder meetings, the fee paid to MFS pursuant to this agreement, and such other expenses as approved by a majority of the fund’s Board of Trustees.

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly owned subsidiary of MFS, is the distributor of shares of the fund. The fund has adopted a plan in accordance with Rule 12b-1 under the Investment Company Act of 1940, as amended (the Distribution Plan). The fund’s Board of Trustees has determined not to implement payments of Rule 12b-1 fees under the Distribution Plan at this time. The fund does not currently pay compensation to MFD for any distribution services provided.

Administrator — MFS provides certain financial, legal, and other administrative services to the fund. MFS bears the costs of the services under the Management Agreement.

Trustees’ and Officers’ Compensation — Under the Management Agreement, MFS pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. MFS also pays compensation to Trustees or officers of the fund who are also officers of the investment adviser for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS and MFD. The fund did not pay any compensation to the independent Trustees for the six months ended August 31, 2026.

10


MFS Active Value ETF

Notes to Financial Statements (unaudited) - continued 

Other — The adviser has voluntarily undertaken to reimburse the fund from its own resources on a quarterly basis for the cost of investment research embedded in the cost of the fund’s securities trades. This agreement may be rescinded at any time. For the six months ended August 31, 2026, this reimbursement amounted to $1,582, which is included in “Other” income in the Statement of Operations.

(4) Portfolio Securities

For the six months ended August 31, 2026, purchases and sales of investments, other than short-term obligations and in-kind transactions, aggregated $122,055,932 and $113,030,277, respectively. Securities received and delivered in-kind through subscriptions and redemptions aggregated $303,122,651 and $30,663,953, respectively.

(5) Purchase and Sales of Fund Shares

The fund issues and redeems shares through MFD at net asset value (“NAV”) only with Authorized Participants and only in large blocks of shares (each, a Creation Unit). An Authorized Participant may purchase or redeem a Creation Unit each business day that the fund is open in exchange for the delivery or receipt of a designated portfolio of in-kind securities and/or cash. Authorized Participants may pay a fixed purchase or redemption transaction fee to offset the transfer and other transaction costs associated with the issuance and redemption of Creation Units. 

Individual fund shares may not be purchased or redeemed directly with the fund. Shares are listed for trading on the New York Stock Exchange, and individual fund shares may only be purchased and sold in the secondary market through a financial intermediary at market price. Because the fund’s shares will trade at market prices rather than NAV, shares may trade at prices greater than NAV (at a premium), at NAV, or less than NAV (at a discount). Transactions in fund shares were as follows: 

Six months ended

8/31/26

Year ended

2/28/26

Shares

Amount

Shares

Amount

Shares sold

11,325,000

$317,007,125

8,500,000

$223,442,758

Shares reacquired

(1,125,000

)

(32,413,548

)

(275,000

)

(7,357,471

)

Net change

10,200,000

$284,593,577

8,225,000

$216,085,287

11


ITEM 8. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active Value ETF.

ITEM 9.  PROXY DISCLOSURES FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active Value ETF.

ITEM 10. REMUNERATION PAID TO DIRECTORS, OFFICERS, AND OTHERS OF OPEN-END MANAGEMENT INVESTMENT COMPANIES.

This information is disclosed as part of the financial statements included in Item 7 above for MFS Active Value ETF. See the Statement of Operations and Note 3 within the Notes to Financial Statements for more information.

ITEM 11. STATEMENT REGARDING BASIS FOR APPROVAL OF INVESTMENT ADVISORY CONTRACT.

12


MFS Active Value ETF

Board Review of Investment Management Agreement

MFS Active Value ETF

The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested (“independent”) Trustees, voting separately, annually approve the continuation of the Fund’s investment management agreement with MFS. The Trustees consider matters bearing on the Fund and its advisory arrangements at their meetings throughout the year, including a review of performance data at each regular meeting. In addition, the independent Trustees met several times over the course of several months beginning in April and ending in July, 2026 (“contract review meetings”) for the specific purpose of considering whether to approve the continuation of the investment management agreement for the Fund and the other investment companies that the Board oversees (the “MFS Funds”). The independent Trustees were assisted in their evaluation of the Fund’s investment management agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS during various contract review meetings. The independent Trustees were also assisted in this process by an independent consultant who was retained by and reported to the independent Trustees.

In connection with their deliberations regarding the continuation of the investment management agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant.  The investment management agreement for the Fund was considered separately, although the Trustees also took into account the common interests of all MFS Funds in their review. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services performed by MFS under the existing investment management agreement and other arrangements with the Fund. The independent Trustees considered that the Fund has a unitary management fee structure, pursuant to which MFS receives a fee covering investment management and administrative services, with MFS paying the Fund’s ordinary, recurring operating expenses (the “Unitary Fee”), subject to certain exceptions.

In connection with their contract review meetings, the Trustees received and relied upon materials that included, among other items: (i) information provided by Broadridge Financial Solutions, Inc. (“Broadridge”), an independent third party, on the investment performance of the Fund for the one-year period ended December 31, 2025 and the investment performance of a group of funds with substantially similar investment classifications/objectives (the “Broadridge performance universe”), (ii) information provided by Broadridge on the Fund’s Unitary Fee and the advisory fees and other expenses of comparable funds identified by Broadridge, as well as all other funds in the same investment classification/category (the “Broadridge expense group and universe”),  (iii) information provided by MFS on the advisory fees of portfolios of other clients of MFS, including institutional separate accounts, (iv) information regarding MFS’ financial results and financial condition, including MFS’ and certain of its affiliates’ estimated profitability from services performed for the Fund and the MFS Funds as a whole, and compared to MFS’ institutional business, (v) MFS’ views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vi) descriptions of various functions performed by MFS for the MFS Funds, such as compliance monitoring and portfolio trading practices, and (vii) information regarding the overall organization of MFS, including information about MFS’ senior management and other personnel providing investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative performance, fee and expense information prepared and provided by Broadridge was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS.

The Trustees’ conclusion as to the continuation of the investment management agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor.  Some of the factors that figured particularly in the Trustees’ deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors.  It is also important to recognize that the fee arrangements for the Fund and other MFS Funds are the result of years of review and discussion between the independent Trustees and MFS, that certain aspects of such arrangements may receive greater scrutiny in some years than in others, and that the Trustees’ conclusions may be based, in part, on their consideration of these same arrangements during the course of the year and in prior years.

Based on information provided by Broadridge and MFS, the Trustees reviewed the Fund’s total return investment performance as well as the Broadridge performance universe over the one-year period ended December 31, 2025. The total return performance of the Fund was in the 4th quintile relative to the other funds in the universe for this one-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers). The Fund commenced operations on December 5, 2024, and has a limited operating history and performance record; therefore, no performance data for the three- or five-year periods was available.  Because of the passage of time, these performance results may differ from the performance results for more recent periods, including those shown elsewhere in this report.

13


MFS Active Value ETF

Board Review of Investment Management Agreement - continued

In the course of their deliberations, the Trustees took into account information provided by MFS in connection with the contract review meetings as well as during investment review meetings conducted with portfolio management personnel during the course of the year regarding the Fund’s performance. After reviewing these and related factors, the Trustees concluded, within the context of their overall conclusions regarding the investment management agreement, that they were satisfied with MFS’ responses and efforts relating to investment performance.

In assessing the reasonableness of the Fund’s Unitary Fee, the Trustees considered, among other things, information on unitary fee structures generally, as well as the terms of the investment management agreement and descriptions of various services performed or procured by MFS under the investment management agreement, including portfolio management and portfolio trading practices and administrative services. The Trustees considered the categories of expenses excluded from the Unitary Fee and therefore payable by the Fund. The Trustees also considered the Fund’s Unitary Fee as compared with the advisory fee and total expense ratios of the Broadridge expense group based on information provided by Broadridge. The Trustees considered that, according to the data provided by Broadridge, the Fund’s Unitary Fee and total expense ratio were each approximately at the applicable Broadridge expense group median.

The Trustees also considered the advisory fees charged by MFS to any institutional separate accounts advised by MFS (“separate accounts”) and unaffiliated investment companies for which MFS serves as subadviser (“subadvised funds”) that have comparable investment strategies to the Fund, if any.  In comparing these fees, the Trustees considered information provided by MFS as to the generally broader scope of services provided by MFS to the Fund, as well as the more extensive regulatory burdens imposed on MFS in managing the Fund, in comparison to separate accounts and subadvised funds.  The Trustees also considered the higher demands placed on MFS’ investment personnel and trading infrastructure as a result of the daily cash in-flows and out-flows of the Fund in comparison to separate accounts.

The Trustees considered that the investment management agreement provides for a unitary fee level that does not include pre-established breakpoints, and considered MFS’ observation that while fee waivers, breakpoints, and expense caps are common for mutual funds, these arrangements are not typically used by ETFs.

The Trustees also considered information prepared by MFS relating to MFS’ costs and profits with respect to the Fund, the MFS Funds considered as a group, and other investment companies and accounts advised by MFS, as well as MFS’ methodologies used to determine and allocate its costs to the MFS Funds, the Fund, and other accounts and products for purposes of estimating profitability.

After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the investment management agreement, that the Unitary Fee charged to the Fund represents reasonable compensation in light of the services being provided by MFS to the Fund.

In addition, the Trustees considered MFS’ resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund.  The Trustees also considered current and developing conditions in the financial services industry, including the presence of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies.  In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc.  The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser that also serves other investment companies as well as other accounts.

The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services provided to the Fund by MFS and its affiliates under agreements and plans other than the investment management agreement. The Trustees also considered the nature, extent and quality of certain other services MFS may perform or arrange for on the Fund’s behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS’ interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services provided by MFS and its affiliates on behalf of the Fund were satisfactory.

The Trustees considered so-called “fall-out benefits” to MFS such as reputational value derived from serving as investment manager to the MFS Funds. The Trustees also considered that MFS discontinued its historic practice of obtaining investment research from portfolio brokerage commissions paid by certain MFS Funds effective January 2018, and directly pays or voluntarily reimburses a Fund, if applicable, for the costs of external research acquired through the use of the Fund’s portfolio brokerage commissions.

Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including the independent Trustees, concluded that the Fund’s investment management agreement with MFS should be continued for an additional one-year period, commencing August 1, 2026.

14


MFS Active Mid Cap ETF

ITEM 7.  FINANCIAL STATEMENTS AND FINANCIAL HIGHLIGHTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

MFS Active Mid Cap ETF

Portfolio of Investments − 8/31/26 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

Issuer

Shares/Par

Value ($)

Common Stocks – 99.4%

Aerospace & Defense – 1.5%

Melrose Industries PLC

41,230

$287,825

Standard Aero, Inc. (a)

9,975

244,288

$532,113

Alcoholic Beverages – 1.3%

Brown-Forman Corp., “B”

10,438

$277,338

Pernod Ricard S.A., ADR

12,737

190,036

$467,374

Apparel, Footwear, & Accessories – 1.4%

Birkenstock Holding PLC (a)(l)

7,787

$271,844

Columbia Sportswear Co.

4,451

255,488

$527,332

Auto & Auto Components – 1.3%

Aptiv PLC (a)

5,377

$240,675

LKQ Corp.

9,842

247,034

$487,709

Brokerage & Asset Managers – 2.2%

Houlihan Lokey, Inc.

1,631

$217,396

Raymond James Financial, Inc.

2,394

426,539

TPG, Inc.

2,926

158,355

$802,290

Business Services – 8.5%

Cognizant Technology Solutions Corp., “A”

6,722

$434,107

CoStar Group, Inc. (a)

8,454

271,120

Equifax, Inc.

1,796

339,731

Fidelity National Information Services, Inc.

7,358

299,986

Global Payments, Inc.

7,366

670,674

Morningstar, Inc.

1,446

316,587

MSCI, Inc.

665

379,476

TransUnion

4,365

370,632

$3,082,313

Chemicals – 0.9%

Element Solutions, Inc.

8,993

$319,611

Construction – 9.0%

Allegion PLC

2,458

$381,605

Equity Lifestyle Properties, Inc., REIT

6,517

413,504

James Hardie Industries PLC (a)

10,960

325,622

Mid-America Apartment Communities, Inc., REIT

2,255

290,557

Otis Worldwide Corp.

3,380

240,419

Pool Corp.

1,527

284,816

Pulte Homes, Inc.

1,729

218,407

SiteOne Landscape Supply, Inc. (a)

3,672

361,802

ECMFS-SEM

1


MFS Active Mid Cap ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Construction – continued

Sun Communities, Inc., REIT

2,394

$290,679

Suncrete, Inc., “A” (a)(l)

7,680

131,712

Vulcan Materials Co.

1,197

322,687

$3,261,810

Consumer Products – 2.4%

International Flavors & Fragrances, Inc.

4,926

$425,262

Kenvue, Inc.

24,073

454,498

$879,760

Containers – 2.2%

Avery Dennison Corp.

2,261

$393,663

Ball Corp.

6,517

410,375

$804,038

Diversified Financial Services – 1.4%

London Stock Exchange Group PLC, ADR

8,130

$245,932

SLM Corp.

10,445

271,257

$517,189

Electrical Equipment – 5.3%

Arxis, Inc. (a)

4,834

$250,256

Hubbell, Inc.

811

367,383

Littlefuse, Inc.

883

363,955

nVent Electric PLC

2,704

407,628

W.W. Grainger, Inc.

399

522,487

$1,911,709

Energy - Independent – 5.4%

Diamondback Energy, Inc.

2,926

$586,604

EQT Corp.

6,650

360,297

Permian Resources Corp.

20,519

477,888

Valero Energy Corp.

1,447

519,357

$1,944,146

Energy - Renewables – 0.3%

Innio N.V. (a)

5,079

$102,596

Engineering - Construction – 1.0%

Jacobs Solutions, Inc.

2,337

$348,330

Hardware, Peripherals, & Assembly – 3.0%

CDW Corp.

1,687

$255,715

Hewlett Packard Enterprise

6,673

348,598

Seagate Technology Holdings PLC

263

217,864

Wix.com Ltd. (a)(l)

3,060

270,045

$1,092,222

Insurance – 5.1%

Assurant, Inc.

1,596

$449,848

Brown & Brown, Inc.

3,621

261,328

Hartford Insurance Group, Inc.

2,394

328,888

2


MFS Active Mid Cap ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Insurance – continued

Selective Insurance Group, Inc.

4,256

$388,530

Willis Towers Watson PLC

1,197

405,244

$1,833,838

Machinery & Tools – 3.3%

Nordson Corp.

1,255

$403,759

Pentair PLC

4,501

272,130

Wabtec Corp.

1,843

526,969

$1,202,858

Media – 1.2%

TKO Group Holdings, Inc.

1,197

$218,584

Warner Music Group Corp.

8,379

236,372

$454,956

Medical & Health Technology & Services – 2.4%

Cencora, Inc.

730

$236,228

ICON PLC (a)

1,413

233,131

Minimed Group, Inc. (a)(l)

19,510

395,272

$864,631

Medical Equipment – 8.7%

Agilent Technologies, Inc.

3,506

$538,381

Align Technology, Inc. (a)

1,896

302,962

Becton, Dickinson and Co.

3,123

587,468

Boston Scientific Corp. (a)

4,893

236,332

DexCom, Inc. (a)

4,208

383,181

STERIS PLC

2,228

518,322

Waters Corp. (a)

1,442

597,896

$3,164,542

Natural Gas - Pipeline – 1.7%

Cheniere Energy, Inc.

2,128

$620,716

Non-Global Systemically Important Banks – 2.3%

M&T Bank Corp.

1,995

$466,710

Prosperity Bancshares, Inc.

5,055

361,736

$828,446

Pharmaceuticals & Biotechnology – 0.7%

Illumina, Inc. (a)

1,191

$254,433

Pollution Control – 1.2%

GFL Environmental, Inc.

10,149

$428,822

Real Estate – 2.5%

CBRE Group, Inc., “A” (a)

2,079

$303,139

NNN REIT, Inc.

6,384

288,557

Regency Centers Corp., REIT

4,256

318,221

$909,917

3


MFS Active Mid Cap ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Real Estate - Storage & Office – 1.4%

Extra Space Storage, Inc., REIT

1,442

$203,466

Rexford Industrial Realty, Inc., REIT

8,047

298,061

$501,527

Restaurants – 2.3%

Aramark

7,714

$434,375

U.S. Foods Holding Corp. (a)

3,720

390,005

$824,380

Retail & E-commerce – 1.9%

Burlington Stores, Inc. (a)

1,341

$348,338

Ross Stores, Inc.

1,506

344,181

$692,519

Semiconductor & Electronic Components – 2.2%

Entegris, Inc.

2,758

$373,130

Microchip Technology, Inc.

5,719

420,060

$793,190

Software – 5.0%

Descartes Systems Group, Inc. (a)

3,838

$309,497

Kinaxis, Inc. (a)

2,134

272,672

MongoDB, Inc. (a)

696

315,546

nCino, Inc. (a)

12,457

281,528

Pegasystems, Inc.

5,288

194,651

Snowflake, Inc., “A” (a)

1,342

444,779

$1,818,673

Transportation & Logistics – 1.7%

C.H. Robinson Worldwide, Inc.

1,734

$259,510

Saia, Inc. (a)

969

344,121

$603,631

Travel, Gaming, & Lodging – 2.7%

Hyatt Hotels Corp.

2,457

$410,246

Southwest Airlines Co.

5,323

205,095

Viking Holdings Ltd. (a)

4,158

358,170

$973,511

Utilities – 6.0%

Alliant Energy Corp.

6,384

$433,984

Ameren Corp.

3,857

408,881

American Water Works Co., Inc.

2,254

311,570

Atmos Energy Corp.

2,261

375,620

PG&E Corp.

19,152

254,147

PPL Corp.

11,305

385,840

$2,170,042

Total Common Stocks (Identified Cost, $33,402,877)

$36,021,174

4


MFS Active Mid Cap ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Mutual Funds – 0.5%

Money Market Funds – 0.5%

State Street Institutional U.S. Government Money Market Fund - Premier Class, 3.62% (j) (Identified Cost, $168,051)

168,051

$168,051

Collateral for Securities Loaned – 2.8%

JPMorgan U.S. Government Money Market Fund - Class IM Shares, 3.62% (j) (Identified Cost, $1,021,575)

1,021,575

$1,021,575

Other Assets, Less Liabilities – (2.7)%

(990,147)

Net Assets – 100.0%

$36,220,653

(a)

Non-income producing security.

(j)

The rate quoted is the annualized seven-day yield of the fund at period end.

(l)

A portion of this security is on loan. See Note 2 for additional information.

The following abbreviations are used in this report and are defined:

ADR

American Depositary Receipt

REIT

Real Estate Investment Trust

See Notes to Financial Statements

5


MFS Active Mid Cap ETF

Financial Statements | Statement of Assets and Liabilities

This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund. 

At 8/31/26 (unaudited)

Assets

Investments in unaffiliated issuers, at value, including $991,408 of securities on loan (identified cost, $34,592,503)

$37,210,800

Receivables for

Interest and dividends

34,323

Total assets

$37,245,123

Liabilities

Payable to custodian

$529

Collateral for securities loaned, at value

1,021,575

Payable to affiliates

Investment adviser

2,366

Total liabilities

$1,024,470

Net assets

$36,220,653

Net assets consist of

Paid-in capital

$33,312,852

Total distributable earnings (loss)

2,907,801

Net assets

$36,220,653

Shares of beneficial interest outstanding (unlimited number of shares authorized)

1,330,000

Net asset value per share (net assets of $36,220,653 / 1,330,000 shares of beneficial interest outstanding)

$27.23

See Notes to Financial Statements

6


MFS Active Mid Cap ETF

Financial Statements | Statement of Operations

This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. 

Six months ended 8/31/26 (unaudited)

Net investment income (loss)

Income

Dividends from unaffiliated issuers

$273,289

Income on securities loaned

10,089

Other

378

Foreign taxes withheld

(1,064

)

Total investment income

$282,692

Expenses

Management fee

$101,998

Total expenses

$101,998

Net investment income (loss)

$180,694

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers

$(166,537

)

Foreign currency

5

In-kind redemptions – unaffiliated issuers

634,743

Net realized gain (loss)

$468,211

Change in unrealized appreciation or depreciation

Unaffiliated issuers

$1,026,210

Translation of assets and liabilities in foreign currencies

5

Net unrealized gain (loss)

$1,026,215

Net realized and unrealized gain (loss)

$1,494,426

Change in net assets from operations

$1,675,120

See Notes to Financial Statements

7


MFS Active Mid Cap ETF

Financial Statements |  Statements of Changes in Net Assets

These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. 

Six months ended

Year ended


8/31/26

(unaudited)


2/28/26(c)

Change in net assets

From operations

Net investment income (loss)

$180,694

$98,504

Net realized gain (loss)

468,211

38,591

Net unrealized gain (loss)

1,026,215

1,592,087

Change in net assets from operations

$1,675,120

$1,729,182

Total distributions to shareholders

$(151,668

)

$(92,003

)

Change in net assets from fund share transactions

$1,013,206

$32,046,816

Total change in net assets

$2,536,658

$33,683,995

Net assets

At beginning of period

33,683,995

—

At end of period

$36,220,653

$33,683,995

(c)

For the period from the commencement of the fund’s investment operations, September 24, 2025, through the stated period end.

See Notes to Financial Statements

8


MFS Active Mid Cap ETF

Financial Statements | Financial Highlights

The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years (or life of the fund, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund (assuming reinvestment of all distributions) held for the entire period. 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26 (c)

Net asset value, beginning of period

$26.11

$24.94

Income (loss) from investment operations

Net investment income (loss) (d)

$0.14

$0.08

Net realized and unrealized gain (loss)

1.09

1.16

Total from investment operations

$1.23

$1.24

Less distributions declared to shareholders

From net investment income

$(0.11

)

$(0.07

)

Net asset value, end of period (x)

$27.23

$26.11

Total return (%) (s)(x)

4.76

(n)

5.00

(n)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses

0.59

(a)

0.59

(a)

Net investment income (loss)

1.04

(a)

0.76

(a)

Portfolio turnover rate (e)

9

(n)

8

(n)

Net assets at end of period (000 omitted)

$36,221

$33,684

(a)

Annualized.

(c)

For the period from the commencement of the fund’s investment operations, September 24, 2025, through the stated period end.

(d)

Per share data is based on average shares outstanding.

(e)

Portfolio turnover rate excludes securities received or delivered in-kind in the process of creating or redeeming fund shares.

(n)

Not annualized.

(s)

From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.

(x)

The net asset value and total return have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted

accounting principles required at period end for financial reporting purposes.

See Notes to Financial Statements

9


MFS Active Mid Cap ETF

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS Active Mid Cap ETF (the fund) is a diversified series of MFS Active Exchange Traded Funds Trust (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

(2) Significant Accounting Policies

General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued.

Segment Reporting — An operating segment is defined in FASB Accounting Standards Codification Topic 280, Segment Reporting as a component of a public entity that engages in business activities from which it may recognize revenues and incur expenses, has operating results that are regularly reviewed by the entity’s chief operating decision maker (CODM) in making resource allocation decisions and assessing segment performance, and for which discrete financial information is available. The fund represents a single operating segment and the Chairman’s Committee of the fund's adviser acts as the segment’s CODM. The fund’s total returns, expense ratios, and changes in net assets which are used by the CODM to assess segment performance and to make resource allocation decisions to the segment are consistent with that presented within the fund’s financial statements.

Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.

Investment Valuations — Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.

Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading

10


MFS Active Mid Cap ETF

Notes to Financial Statements (unaudited) - continued 

does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of August 31, 2026 in valuing the fund's assets and liabilities:

Financial Instruments

Level 1

Level 2

Level 3

Total

Equity Securities

$36,021,174

$—

$—

$36,021,174

Investment Companies

1,189,626

—

—

1,189,626

Total

$37,210,800

$—

$—

$37,210,800

For further information regarding security characteristics, see the Portfolio of Investments.

Foreign Currency Translation — Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions or on the reporting date for foreign denominated receivables and payables. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on receivables, payables, income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed.

Security Loans — Under its Securities Lending Agency Agreement with the fund, Goldman Sachs Agency Lending, as lending agent, loans the securities of the fund to certain qualified institutions (the “Borrowers”) approved by the fund. Security loans can be terminated at the discretion of either the lending agent or the fund and the related securities must be returned within the earlier of the standard trade settlement period for such securities or within five business days. The loans are collateralized by cash and/or U.S. government securities in an amount typically at least equal to the market value of the securities loaned. On loans collateralized by cash, the cash collateral is invested in a money market fund. The market value of the loaned securities is determined at the close of business of the fund and any additional required collateral is delivered to the fund on the next business day. The lending agent provides the fund with indemnification against Borrower default. In the event of Borrower default, the lending agent will, for the benefit of the fund, either purchase securities identical to those loaned or pay the fund the market value of the loaned securities. In return, the lending agent assumes the fund's rights to the related collateral. If the collateral value is less than the cost to purchase identical securities or the cash needed to pay their market value, the lending agent is responsible for the shortfall, but only to the extent that such shortfall is not due to a decline in collateral value resulting from collateral reinvestment for which the fund bears the risk of loss. At period end, the fund had investment securities on loan, all of which were classified as equity securities in the fund's Portfolio of Investments, with a fair value of $991,408.  The fair value of the fund's investment securities on loan and a related liability of $1,021,575 for the obligation to return cash collateral received on securities loaned are both presented gross in the Statement of Assets and Liabilities. The collateral on securities loaned exceeded the value of securities on loan at period end. The liability for cash collateral for securities loaned is carried at fair value, which is categorized as level 2 within the fair value hierarchy. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. government securities, a fee is received from the Borrower, and is allocated between the fund and the lending agent. Income from securities lending is separately reported in the Statement of Operations. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income.

11


MFS Active Mid Cap ETF

Notes to Financial Statements (unaudited) - continued 

Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.

Investment Transactions and Income —  Interest income is recorded on the accrual basis. Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend payments received in additional securities are recorded on the ex-dividend date in an amount equal to the value of the security on such date.

The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.

Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.

Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for generally a three-year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.

Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.

Book/tax differences primarily relate to redemptions in-kind.

The tax character of distributions made during the six months ended August 31, 2026 will be determined at fiscal year end. The tax character of distributions declared to shareholders for the last fiscal year is as follows: 

Year ended

2/28/26 (c)

Ordinary income (including any short-term capital gains)

$92,003

(c)

For the period from the commencement of the fund’s investment operations, September 24, 2025, through the stated period end.

The federal tax cost and the tax basis components of distributable earnings were as follows: 

As of 8/31/26

Cost of investments

$34,592,503

Gross appreciation

4,468,055

Gross depreciation

(1,849,758

)

Net unrealized appreciation (depreciation)

$2,618,297

As of 2/28/26

Undistributed ordinary income

6,393

Capital loss carryforwards

(214,131

)

Net unrealized appreciation (depreciation)

1,592,087

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

As of February 28, 2026, the fund had capital loss carryforwards available to offset future realized gains. These net capital losses may be carried forward indefinitely and their character is retained as short-term and/or long-term losses. Such losses are characterized as follows: 

12


MFS Active Mid Cap ETF

Notes to Financial Statements (unaudited) - continued 

Short-Term

$(214,131

)

(3) Transactions with Affiliates

Investment Adviser — The fund has an Investment Management Agreement (“Management Agreement”) with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.59% of the fund’s average daily net assets. Under the Management Agreement, MFS will pay substantially all the fund’s operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), litigation expenses, the cost of proxy solicitations and shareholder meetings, the fee paid to MFS pursuant to this agreement, and such other expenses as approved by a majority of the fund’s Board of Trustees.

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly owned subsidiary of MFS, is the distributor of shares of the fund. The fund has adopted a plan in accordance with Rule 12b-1 under the Investment Company Act of 1940, as amended (the Distribution Plan). The fund’s Board of Trustees has determined not to implement payments of Rule 12b-1 fees under the Distribution Plan at this time. The fund does not currently pay compensation to MFD for any distribution services provided.

Administrator — MFS provides certain financial, legal, and other administrative services to the fund. MFS bears the costs of the services under the Management Agreement.

Trustees’ and Officers’ Compensation — Under the Management Agreement, MFS pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. MFS also pays compensation to Trustees or officers of the fund who are also officers of the investment adviser for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS and MFD. The fund did not pay any compensation to the independent Trustees for the six months ended August 31, 2026.

Other — At August 31, 2026, MFS held approximately 89% of the outstanding shares of the fund.

The adviser has voluntarily undertaken to reimburse the fund from its own resources on a quarterly basis for the cost of investment research embedded in the cost of the fund’s securities trades. This agreement may be rescinded at any time. For the six months ended August 31, 2026, this reimbursement amounted to $378, which is included in “Other” income in the Statement of Operations.

(4) Portfolio Securities

For the six months ended August 31, 2026, purchases and sales of investments, other than short-term obligations and in-kind transactions, aggregated $4,560,256 and $3,062,258, respectively.  Securities received and delivered in-kind through subscriptions and redemptions aggregated $1,012,661 and $1,418,099, respectively.

(5) Purchase and Sales of Fund Shares

The fund issues and redeems shares through MFD at net asset value (“NAV”) only with Authorized Participants and only in large blocks of shares (each, a Creation Unit). An Authorized Participant may purchase or redeem a Creation Unit each business day that the fund is open in exchange for the delivery or receipt of a designated portfolio of in-kind securities and/or cash. Authorized Participants may pay a fixed purchase or redemption transaction fee to offset the transfer and other transaction costs associated with the issuance and redemption of Creation Units. 

Individual fund shares may not be purchased or redeemed directly with the fund. Shares are listed for trading on the New York Stock Exchange, and individual fund shares may only be purchased and sold in the secondary market through a financial intermediary at market price. Because the fund’s shares will trade at market prices rather than NAV, shares may trade at prices greater than NAV (at a premium), at NAV, or less than NAV (at a discount). Transactions in fund shares were as follows: 

Six months ended

8/31/26

Year ended

2/28/26 (c)

Shares

Amount

Shares

Amount

Shares sold

110,000

$2,831,832

1,350,000

$33,553,414

Shares reacquired

(70,000

)

(1,818,626

)

(60,000

)

(1,506,598

)

Net change

40,000

$1,013,206

1,290,000

$32,046,816

(c)

For the period from the commencement of the fund’s investment operations, September 24, 2025, through the stated period end.

13


ITEM 8. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active Mid Cap ETF.

ITEM 9.  PROXY DISCLOSURES FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active Mid Cap ETF.

ITEM 10. REMUNERATION PAID TO DIRECTORS, OFFICERS, AND OTHERS OF OPEN-END MANAGEMENT INVESTMENT COMPANIES.

This information is disclosed as part of the financial statements included in Item 7 above for MFS Active Mid Cap ETF. See the Statement of Operations and Note 3 within the Notes to Financial Statements for more information.

ITEM 11. STATEMENT REGARDING BASIS FOR APPROVAL OF INVESTMENT ADVISORY CONTRACT.

Not Applicable.

14


MFS Blended Research International Equity ETF

ITEM 7.  FINANCIAL STATEMENTS AND FINANCIAL HIGHLIGHTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

MFS Blended Research International Equity ETF

Portfolio of Investments − 8/31/26 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

Issuer

Shares/Par

Value ($)

Common Stocks – 96.4%

Aerospace & Defense – 0.6%

MTU Aero Engines Holding AG

7,407

$3,029,326

Alcoholic Beverages – 1.2%

Ambev S.A., ADR (l)

1,275,247

$3,659,959

Pernod Ricard S.A.

32,058

2,401,783

$6,061,742

Apparel, Footwear, & Accessories – 1.4%

Burberry Group PLC (a)

105,038

$1,542,820

Christian Dior S.A.

3,073

1,446,338

Compagnie Financiere Richemont S.A.

7,672

1,823,684

LVMH Moet Hennessy Louis Vuitton SE

3,760

1,979,754

$6,792,596

Auto & Auto Components – 2.0%

Compagnie Generale des Etablissements Michelin

32,713

$1,329,922

Mahindra & Mahindra Ltd.

51,300

1,768,905

Maruti Suzuki India Ltd.

5,743

817,392

PT Astra International Tbk

6,408,237

1,736,356

Suzuki Motor Corp.

282,593

3,939,497

$9,592,072

Brokerage & Asset Managers – 0.5%

Brookfield Corp.

54,475

$2,245,460

Business Services – 3.8%

CGI, Inc.

17,257

$1,298,589

Infosys Technologies Ltd., ADR (l)

210,279

2,535,965

ISS A/S

94,894

4,249,656

Kanzhun Ltd., ADR

58,284

1,011,810

Recruit Holdings Co. Ltd.

28,629

3,264,333

Scout24 AG

35,283

3,270,440

Tata Consultancy Services Ltd.

112,295

2,830,698

$18,461,491

Chemicals – 0.9%

Sime Darby Berhad

1,617,726

$1,044,731

Teijin Ltd.

97,873

1,077,063

UPL Ltd.

246,700

1,457,294

Yara International A.S.A.

22,237

1,085,225

$4,664,313

Construction – 1.5%

Anhui Conch Cement Co. Ltd.

964,943

$2,084,147

Compagnie de Saint-Gobain S.A.

34,107

3,102,801

Techtronic Industries Co. Ltd.

124,505

2,152,266

$7,339,214

EBIFS-SEM

1


MFS Blended Research International Equity ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Diversified Financial Services – 0.8%

Deutsche Boerse AG

5,429

$1,816,143

IG Group Holdings PLC

109,780

2,082,528

$3,898,671

Electrical Equipment – 1.3%

Contemporary Amperex Technology Co. Ltd., “A”

23,500

$1,271,371

Legrand S.A.

3,998

634,121

Mitsubishi Electric Corp.

62,131

2,172,154

Siemens Energy AG

6,393

1,055,798

Signify N.V.

58,936

1,053,555

$6,186,999

Energy - Independent – 4.4%

Cenovus Energy, Inc.

154,904

$4,980,164

Eni S.p.A.

126,404

3,421,745

MOL Hungarian Oil & Gas PLC (a)

171,839

2,762,236

Orlen S.A.

42,251

1,748,544

PetroChina Co. Ltd.

3,934,027

5,104,205

TotalEnergies SE

39,217

3,440,579

$21,457,473

Engineering - Construction – 2.1%

Doosan Bobcat, Inc.

37,209

$1,693,790

Eiffage S.A.

7,539

954,505

JGC Corp.

149,904

2,211,260

Koninklijke BAM Groep N.V.

54,781

739,390

Samsung E&A Co. Ltd.

40,607

1,397,479

VINCI S.A.

25,699

3,377,602

$10,374,026

Entertainment & Leisure – 3.6%

Giant Network Group Co. Ltd., “A”

338,600

$1,383,151

NetEase, Inc., ADR

39,293

4,785,102

Sankyo Co. Ltd.

64,653

812,665

Sony Group Corp.

170,056

4,275,085

Tencent Holdings Ltd., ADR

92,288

5,277,951

Yamaha Corp.

160,602

1,347,147

$17,881,101

Food & Beverages – 0.7%

Arca Continental S.A.B. de C.V.

61,492

$704,737

AVI Ltd.

196,951

1,041,396

Inner Mongolia Yili Industrial Group Co. Ltd., “A”

201,400

794,229

JBS N.V., “A”

58,276

783,229

$3,323,591

Food & Drug Stores – 2.0%

Carrefour S.A.

104,153

$1,896,344

Jeronimo Martins SGPS S.A.

104,254

2,179,731

Sugi Holdings Co. Ltd.

129,306

1,068,849

Tesco PLC

731,762

4,534,303

$9,679,227

2


MFS Blended Research International Equity ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Global Systemically Important Banks – 9.6%

Barclays PLC

859,526

$5,784,276

BNP Paribas S.A.

69,982

8,354,735

China Construction Bank Corp.

3,861,532

4,680,078

Industrial & Commercial Bank of China, “H”

919,962

888,455

ING Groep N.V.

228,597

8,094,582

Mizuho Financial Group, Inc.

64,653

3,489,845

Toronto-Dominion Bank

64,746

7,828,439

UBS Group AG

142,787

7,821,622

$46,942,032

Hardware, Peripherals, & Assembly – 5.9%

Hitachi Ltd.

26,961

$914,787

Hon Hai Precision Industry Co. Ltd.

618,627

4,875,378

King Slide Works Co. Ltd.

3,335

1,490,773

Kioxia Holdings Corp. (a)

3,325

1,040,480

Lenovo Group Ltd.

788,248

3,020,874

Samsung Electronics Co. Ltd.

8,320

1,580,593

SK hynix, Inc.

8,327

10,185,151

SK Square Co. Ltd.

4,562

3,456,667

Wix.com Ltd. (a)(l)

26,003

2,294,765

$28,859,468

Insurance – 3.7%

AIA Group Ltd.

553,641

$5,385,647

Manulife Financial Corp.

99,955

4,239,092

Sompo Holdings, Inc.

136,655

5,859,698

Zurich Insurance Group AG

3,861

2,830,492

$18,314,929

Machinery & Tools – 2.2%

Aalberts Industries N.V.

62,841

$3,200,010

Delta Electronics, Inc.

22,205

1,287,977

Finning International, Inc.

13,347

875,675

GEA Group AG

69,343

5,412,646

$10,776,308

Media – 0.1%

Spotify Technology S.A. (a)

1,350

$733,887

Medical & Health Technology & Services – 0.3%

M3, Inc.

131,603

$1,510,860

Medical Equipment – 1.7%

Fisher & Paykel Healthcare Corp. Ltd.

130,891

$3,438,411

Koninklijke Philips N.V.

89,472

2,380,948

Smith & Nephew PLC

178,919

2,575,876

$8,395,235

Metals & Mining – 7.3%

Agnico Eagle Mines Ltd.

10,869

$2,207,603

Itochu Corp.

337,345

4,451,476

Kinross Gold Corp.

208,408

6,393,957

OceanaGold Corp.

164,409

4,836,361

3


MFS Blended Research International Equity ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Metals & Mining – continued

PLS Group Ltd. (a)

362,119

$1,401,270

Rio Tinto PLC

89,140

9,269,023

Sumitomo Corp.

126,552

1,419,204

Toyota Tsusho Corp.

90,633

4,242,589

Vale S.A., ADR

107,217

1,617,904

$35,839,387

Natural Gas - Pipeline – 0.5%

APA Group

285,052

$2,224,481

Network & Telecom – 1.0%

Accton Technology Corp.

38,607

$2,476,680

LM Ericsson Telephone Co., “B”

227,008

2,292,443

$4,769,123

Non-Global Systemically Important Banks – 9.8%

AIB Group PLC

415,976

$5,298,032

Banco Bilbao Vizcaya Argentaria S.A.

268,687

7,811,694

BPER Banca S.p.A.

370,203

6,129,350

China Merchants Bank Co. Ltd.

377,945

2,456,646

Credicorp Ltd.

6,393

2,342,267

Grupo Financiero Banorte S.A. de C.V.

239,696

2,714,207

Japan Post Bank Co. Ltd.

109,722

2,338,675

KB Financial Group, Inc., ADR

22,307

2,783,691

NatWest Group PLC

785,380

7,230,110

Oversea-Chinese Banking Corp. Ltd.

129,402

3,208,836

Raiffeisen International Bank Holding AG

29,741

2,204,012

Shinhan Financial Group Co. Ltd., ADR

43,017

3,405,656

$47,923,176

Oil Services – 0.5%

Tenaris S.A.

84,721

$2,354,895

Pharmaceuticals & Biotechnology – 4.8%

Astellas Pharma, Inc.

126,669

$1,880,410

Bayer AG

17,179

978,557

Gedeon Richter PLC

36,842

1,538,246

GSK PLC

139,759

3,510,039

Novartis AG

54,495

8,309,586

Roche Holding AG

2,468

1,077,145

Sanofi S.A.

51,263

4,573,614

Sanofi S.A., ADR

39,961

1,772,670

$23,640,267

Real Estate – 1.5%

Charter Hall Group, REIT

113,333

$1,569,062

Emaar Properties PJSC

544,674

1,601,568

Scentre Group Ltd., REIT

1,621,958

4,172,639

$7,343,269

4


MFS Blended Research International Equity ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Retail & E-commerce – 2.4%

Aritzia, Inc. (a)

36,457

$3,474,062

De'Longhi S.p.A.

37,355

1,836,251

Dollarama, Inc.

35,386

4,469,878

PDD Holdings, Inc., ADR (a)

10,230

859,320

Shimamura Co. Ltd.

29,876

612,294

Vipshop Holdings Ltd., ADR

53,181

696,671

$11,948,476

Semiconductor & Electronic Components – 10.3%

Advantest Corp.

9,405

$1,983,439

ASML Holding N.V.

7,672

12,937,581

Dai Nippon Printing Co. Ltd.

200,335

3,888,819

MediaTek, Inc.

20,966

2,594,148

Renesas Electronics Corp.

91,770

1,948,569

Taiwan Semiconductor Manufacturing Co. Ltd., ADR

59,849

24,856,487

Tokyo Electron Ltd.

6,322

2,233,575

$50,442,618

Software – 0.9%

Check Point Software Technologies Ltd. (a)

15,334

$2,130,046

Constellation Software, Inc.

280

634,108

Shopify, Inc. (a)

12,161

1,792,166

$4,556,320

Telecom Services – 1.6%

KDDI Corp.

193,798

$3,590,267

LG Uplus Corp.

146,022

1,599,350

MTN Group Ltd.

115,122

1,351,117

PT Telkom Indonesia (Persero) Tbk

85,321

1,243,980

$7,784,714

Tobacco – 1.7%

British American Tobacco PLC

121,181

$6,779,832

Imperial Brands PLC

42,890

1,468,591

$8,248,423

Transportation & Logistics – 0.6%

Yangzijiang Shipbuilding Holdings Ltd.

710,836

$2,706,668

Travel, Gaming, & Lodging – 0.9%

Japan Airlines Co. Ltd.

168,126

$3,169,925

Lottery Corp. Ltd.

186,539

667,032

OPAP S.A.

45,986

721,103

$4,558,060

Utilities – 2.3%

AXIA Energia

343,324

$3,519,675

AXIA Energia, ADR

134,419

1,367,041

CLP Holdings Ltd.

251,872

2,528,858

E.ON SE

106,732

2,206,746

5


MFS Blended Research International Equity ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Utilities – continued

ENGIE S.A.

64,448

$1,841,545

$11,463,865

Total Common Stocks (Identified Cost, $442,173,497)

$472,323,763

Preferred Stocks – 2.5%

Hardware, Peripherals, & Assembly – 2.5%

Samsung Electronics Co. Ltd. (Identified Cost, $9,117,170)

89,078

$12,138,716

Mutual Funds – 0.9%

Money Market Funds – 0.9%

State Street Institutional U.S. Government Money Market Fund - Premier Class, 3.62% (j) (Identified Cost, $4,541,423)

4,541,423

$4,541,423

Collateral for Securities Loaned – 1.1%

JPMorgan U.S. Government Money Market Fund - Class IM Shares, 3.62% (j) (Identified Cost, $5,453,750)

5,453,750

$5,453,750

Other Assets, Less Liabilities – (0.9)%

(4,495,044)

Net Assets – 100.0%

$489,962,608

(a)

Non-income producing security.

(j)

The rate quoted is the annualized seven-day yield of the fund at period end.

(l)

A portion of this security is on loan. See Note 2 for additional information.

The following abbreviations are used in this report and are defined:

ADR

American Depositary Receipt

REIT

Real Estate Investment Trust

See Notes to Financial Statements

6


MFS Blended Research International Equity ETF

Financial Statements | Statement of Assets and Liabilities

This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund. 

At 8/31/26 (unaudited)

Assets

Investments in unaffiliated issuers, at value, including $5,239,375 of securities on loan (identified cost, $461,285,840)

$494,457,652

Cash

9,252

Foreign currency, at value (identified cost, $130,673)

131,046

Receivables for

Interest and dividends

836,698

Total assets

$495,434,648

Liabilities

Collateral for securities loaned, at value

$5,453,750

Payable to affiliates

Investment adviser

18,290

Total liabilities

$5,472,040

Net assets

$489,962,608

Net assets consist of

Paid-in capital

$452,694,671

Total distributable earnings (loss)

37,267,937

Net assets

$489,962,608

Shares of beneficial interest outstanding (unlimited number of shares authorized)

15,800,000

Net asset value per share (net assets of $489,962,608 / 15,800,000 shares of beneficial interest outstanding)

$31.01

See Notes to Financial Statements

7


MFS Blended Research International Equity ETF

Financial Statements | Statement of Operations

This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. 

Six months ended 8/31/26 (unaudited)

Net investment income (loss)

Income

Dividends from unaffiliated issuers

$5,255,362

Income on securities loaned

86,611

Other

18,820

Interest

182

Foreign taxes withheld

(522,865

)

Total investment income

$4,838,110

Expenses

Management fee

$518,603

Miscellaneous

138

Total expenses

$518,741

Net investment income (loss)

$4,319,369

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers (includes $844 foreign capital gains tax)

$(1,912,786

)

Foreign currency

(52,705

)

In-kind redemptions – unaffiliated issuers

2,350,863

Net realized gain (loss)

$385,372

Change in unrealized appreciation or depreciation

Unaffiliated issuers (includes $3,745 decrease in deferred foreign capital gains tax)

$21,779,072

Translation of assets and liabilities in foreign currencies

785

Net unrealized gain (loss)

$21,779,857

Net realized and unrealized gain (loss)

$22,165,229

Change in net assets from operations

$26,484,598

See Notes to Financial Statements

8


MFS Blended Research International Equity ETF

Financial Statements |  Statements of Changes in Net Assets

These statements describe the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. 

Six months ended

Year ended


8/31/26

(unaudited)


2/28/26(c)

Change in net assets

From operations

Net investment income (loss)

$4,319,369

$250,754

Net realized gain (loss)

385,372

479,947

Net unrealized gain (loss)

21,779,857

11,393,942

Change in net assets from operations

$26,484,598

$12,124,643

Total distributions to shareholders

$(500,019

)

$(170,002

)

Change in net assets from fund share transactions

$317,756,781

$134,084,953

Miscellaneous capital

$119,336

$62,318

Total change in net assets

$343,860,696

$146,101,912

Net assets

At beginning of period

146,101,912

—

At end of period

$489,962,608

$146,101,912

(c)

For the period from the commencement of the fund’s investment operations, October 22, 2025, through the stated period end.

See Notes to Financial Statements

9


MFS Blended Research International Equity ETF

Financial Statements | Financial Highlights

The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years (or life of the fund, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund (assuming reinvestment of all distributions) held for the entire period. 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26 (c)

Net asset value, beginning of period

$29.37

$24.88

Income (loss) from investment operations

Net investment income (loss) (d)

$0.42

$0.11

Net realized and unrealized gain (loss)

1.25

4.42

Total from investment operations

$1.67

$4.53

Less distributions declared to shareholders

From net investment income

$(0.04

)

$(0.07

)

Miscellaneous capital (d)

$0.01

$0.03

Net asset value, end of period (x)

$31.01

$29.37

Total return (%) (s)(x)

5.72

(n)

18.38

(n)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses

0.34

(a)

0.34

(a)

Net investment income (loss)

2.83

(a)

1.10

(a)

Portfolio turnover rate (e)

18

(n)

8

(n)

Net assets at end of period (000 omitted)

$489,963

$146,102

(a)

Annualized.

(c)

For the period from the commencement of the fund’s investment operations, October 22, 2025, through the stated period end.

(d)

Per share data is based on average shares outstanding.

(e)

Portfolio turnover rate excludes securities received or delivered in-kind in the process of creating or redeeming fund shares.

(n)

Not annualized.

(s)

From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.

(x)

The net asset value and total return have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted

accounting principles required at period end for financial reporting purposes.

See Notes to Financial Statements

10


MFS Blended Research International Equity ETF

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS Blended Research International Equity ETF (the fund) is a diversified series of MFS Active Exchange Traded Funds Trust (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

(2) Significant Accounting Policies

General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued. The fund invests in foreign securities, including securities of emerging market issuers. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country’s market, economic, industrial, political, regulatory, geopolitical, environmental, public health, and other conditions. Investments tied economically to emerging markets, especially frontier markets, can involve additional and greater risks than the risks associated with investments in developed markets.  Emerging markets can have less developed markets, greater custody and operational risk, less developed legal, regulatory, and accounting systems, greater government involvement in the economy, greater risk of new or inconsistent government treatment of or restrictions on issuers and instruments, and greater political, social, geopolitical, and economic instability than developed markets.

Segment Reporting — An operating segment is defined in FASB Accounting Standards Codification Topic 280, Segment Reporting as a component of a public entity that engages in business activities from which it may recognize revenues and incur expenses, has operating results that are regularly reviewed by the entity’s chief operating decision maker (CODM) in making resource allocation decisions and assessing segment performance, and for which discrete financial information is available. The fund represents a single operating segment and the Chairman’s Committee of the fund's adviser acts as the segment’s CODM. The fund’s total returns, expense ratios, and changes in net assets which are used by the CODM to assess segment performance and to make resource allocation decisions to the segment are consistent with that presented within the fund’s financial statements.

Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.

Investment Valuations — Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.

Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

11


MFS Blended Research International Equity ETF

Notes to Financial Statements (unaudited) - continued 

Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of August 31, 2026 in valuing the fund's assets and liabilities:

Financial Instruments

Level 1

Level 2

Level 3

Total

Equity Securities

$484,462,479

$—

$—

$484,462,479

Investment Companies

9,995,173

—

—

9,995,173

Total

$494,457,652

$—

$—

$494,457,652

For further information regarding security characteristics, see the Portfolio of Investments.

Foreign Currency Translation — Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions or on the reporting date for foreign denominated receivables and payables. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on receivables, payables, income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed.

Security Loans — Under its Securities Lending Agency Agreement with the fund, Goldman Sachs Agency Lending, as lending agent, loans the securities of the fund to certain qualified institutions (the “Borrowers”) approved by the fund. Security loans can be terminated at the discretion of either the lending agent or the fund and the related securities must be returned within the earlier of the standard trade settlement period for such securities or within five business days. The loans are collateralized by cash and/or U.S. government securities in an amount typically at least equal to the market value of the securities loaned. On loans collateralized by cash, the cash collateral is invested in a money market fund. The market value of the loaned securities is determined at the close of business of the fund and any additional required collateral is delivered to the fund on the next business day. The lending agent provides the fund with indemnification against Borrower default. In the event of Borrower default, the lending agent will, for the benefit of the fund, either purchase securities identical to those loaned or pay the fund the market value of the loaned securities. In return, the lending agent assumes the fund's rights to the related collateral. If the collateral value is less than the cost to purchase identical securities or the cash needed to pay their market value, the lending agent is responsible for the shortfall, but only to the extent that such shortfall is not due to a decline in collateral value resulting from collateral reinvestment for which the fund bears the risk of loss. At period end, the fund had investment securities on loan, all of which were classified as equity securities in the fund's Portfolio of Investments, with a fair value of $5,239,375.  The fair value of the fund's investment securities on loan and a related liability of $5,453,750 for the obligation to return cash collateral received on securities loaned are both presented gross in the Statement of Assets and Liabilities. The collateral on securities loaned exceeded the value of securities on loan at period end. The

12


MFS Blended Research International Equity ETF

Notes to Financial Statements (unaudited) - continued 

liability for cash collateral for securities loaned is carried at fair value, which is categorized as level 2 within the fair value hierarchy. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. government securities, a fee is received from the Borrower, and is allocated between the fund and the lending agent. Income from securities lending is separately reported in the Statement of Operations. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income.

Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.

Investment Transactions and Income —  Interest income is recorded on the accrual basis. Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend and interest payments received in additional securities are recorded on the ex-dividend or ex-interest date in an amount equal to the value of the security on such date.

The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.

Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.

Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for generally a three-year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.

Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.

Book/tax differences primarily relate to passive foreign investment companies and redemptions in-kind. 

The tax character of distributions made during the six months ended August 31, 2026 will be determined at fiscal year end. The tax character of distributions declared to shareholders for the last fiscal year is as follows: 

Year ended

2/28/26 (c)

Ordinary income (including any short-term capital gains)

$170,002

(c)

For the period from the commencement of the fund’s investment operations, October 22, 2025, through the stated period end.

The federal tax cost and the tax basis components of distributable earnings were as follows: 

13


MFS Blended Research International Equity ETF

Notes to Financial Statements (unaudited) - continued 

As of 8/31/26

Cost of investments

$461,705,533

Gross appreciation

42,901,400

Gross depreciation

(10,149,281

)

Net unrealized appreciation (depreciation)

$32,752,119

As of 2/28/26

Undistributed ordinary income

493,681

Capital loss carryforwards

(176,274

)

Other temporary differences

(10,841

)

Net unrealized appreciation (depreciation)

10,976,792

The aggregate cost above includes prior fiscal year end tax adjustments, if applicable.

As of February 28, 2026, the fund had capital loss carryforwards available to offset future realized gains. These net capital losses may be carried forward indefinitely and their character is retained as short-term and/or long-term losses. Such losses are characterized as follows: 

Short-Term

$(176,274

)

(3) Transactions with Affiliates

Investment Adviser — The fund has an Investment Management Agreement (“Management Agreement”) with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.34% of the fund’s average daily net assets. Under the Management Agreement, MFS will pay substantially all the fund’s operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), litigation expenses, the cost of proxy solicitations and shareholder meetings, the fee paid to MFS pursuant to this agreement, and such other expenses as approved by a majority of the fund’s Board of Trustees.

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly owned subsidiary of MFS, is the distributor of shares of the fund. The fund has adopted a plan in accordance with Rule 12b-1 under the Investment Company Act of 1940, as amended (the Distribution Plan). The fund’s Board of Trustees has determined not to implement payments of Rule 12b-1 fees under the Distribution Plan at this time. The fund does not currently pay compensation to MFD for any distribution services provided.

Administrator — MFS provides certain financial, legal, and other administrative services to the fund. MFS bears the costs of the services under the Management Agreement.

Trustees’ and Officers’ Compensation — Under the Management Agreement, MFS pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. MFS also pays compensation to Trustees or officers of the fund who are also officers of the investment adviser for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS and MFD. The fund did not pay any compensation to the independent Trustees for the six months ended August 31, 2026.

Other — The adviser has voluntarily undertaken to reimburse the fund from its own resources on a quarterly basis for the cost of investment research embedded in the cost of the fund’s securities trades. This agreement may be rescinded at any time. For the six months ended August 31, 2026, this reimbursement amounted to $17,318, which is included in “Other” income in the Statement of Operations.

(4) Portfolio Securities

For the six months ended August 31, 2026, purchases and sales of investments, other than short-term obligations and in-kind transactions, aggregated $121,349,790 and $55,009,052, respectively. Securities received and delivered in-kind through subscriptions and redemptions aggregated $259,847,663 and $8,363,120, respectively.

(5) Purchase and Sales of Fund Shares

The fund issues and redeems shares through MFD at net asset value (“NAV”) only with Authorized Participants and only in large blocks of shares (each, a Creation Unit). An Authorized Participant may purchase or redeem a Creation Unit each business day that the fund is open in exchange for the delivery or receipt of a designated portfolio of in-kind securities and/or cash. Authorized

14


MFS Blended Research International Equity ETF

Notes to Financial Statements (unaudited) - continued 

Participants may pay a fixed purchase or redemption transaction fee to offset the transfer and other transaction costs associated with the issuance and redemption of Creation Units.  An additional variable fee may be charged for certain transactions. These variable fees are included in “Miscellaneous capital” in the Statement of Changes in Net Assets.

Individual fund shares may not be purchased or redeemed directly with the fund. Shares are listed for trading on the New York Stock Exchange, and individual fund shares may only be purchased and sold in the secondary market through a financial intermediary at market price. Because the fund’s shares will trade at market prices rather than NAV, shares may trade at prices greater than NAV (at a premium), at NAV, or less than NAV (at a discount). Transactions in fund shares were as follows: 

Six months ended

8/31/26

Year ended

2/28/26 (c)

Shares

Amount

Shares

Amount

Shares sold

11,125,000

$326,857,478

5,125,002

$138,345,981

Shares reacquired

(300,000

)

(9,100,697

)

(150,002

)

(4,261,028

)

Net change

10,825,000

$317,756,781

4,975,000

$134,084,953

(c)

For the period from the commencement of the fund’s investment operations, October 22, 2025, through the stated period end.

15


ITEM 8. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Blended Research International Equity ETF.

ITEM 9.  PROXY DISCLOSURES FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Blended Research International Equity ETF.

ITEM 10. REMUNERATION PAID TO DIRECTORS, OFFICERS, AND OTHERS OF OPEN-END MANAGEMENT INVESTMENT COMPANIES.

This information is disclosed as part of the financial statements included in Item 7 above for MFS Blended Research International Equity ETF. See the Statement of Operations and Note 3 within the Notes to Financial Statements for more information.

ITEM 11. STATEMENT REGARDING BASIS FOR APPROVAL OF INVESTMENT ADVISORY CONTRACT.

Not Applicable.

16


MFS Active International Value ETF

ITEM 7.  FINANCIAL STATEMENTS AND FINANCIAL HIGHLIGHTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

MFS Active International Value ETF

Portfolio of Investments − 8/31/26 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

Issuer

Shares/Par

Value ($)

Common Stocks – 96.7%

Aerospace & Defense – 2.0%

BAE Systems PLC

9,994

$276,796

Dassault Aviation S.A.

684

225,479

$502,275

Alcoholic Beverages – 1.2%

Diageo PLC

13,262

$307,108

Auto & Auto Components – 2.8%

Aptiv PLC (a)

3,652

$163,464

Compagnie Generale des Etablissements Michelin

9,006

366,132

USS Co. Ltd.

13,942

173,980

$703,576

Business Services – 1.1%

Experian PLC

6,384

$263,316

Chemicals – 2.7%

Akzo Nobel N.V.

3,838

$275,060

FUJIFILM Holdings Corp.

8,930

189,501

Nitto Denko Corp.

9,956

218,876

$683,437

Construction – 1.7%

Techtronic Industries Co. Ltd.

24,776

$428,292

Consumer Products – 1.5%

Haleon PLC

76,992

$384,122

Diversified Financial Services – 2.7%

Deutsche Boerse AG

1,026

$343,224

IG Group Holdings PLC

17,632

334,479

$677,703

Electrical Equipment – 3.5%

Legrand S.A.

798

$126,570

Mitsubishi Electric Corp.

10,108

353,385

Schneider Electric SE

1,178

403,103

$883,058

Energy - Independent – 7.6%

Cenovus Energy, Inc.

13,300

$427,228

Eni S.p.A.

24,358

659,369

TotalEnergies SE

9,310

816,783

$1,903,380

EILFS-SEM

1


MFS Active International Value ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Food & Drug Stores – 3.8%

Seven & I Holdings Co. Ltd.

34,546

$438,123

Tesco PLC

80,750

500,361

$938,484

Global Systemically Important Banks – 14.0%

Barclays PLC

87,818

$590,981

BNP Paribas S.A.

8,875

1,059,534

Mitsubishi UFJ Financial Group, Inc.

19,264

443,765

Mizuho Financial Group, Inc.

3,990

215,373

Toronto-Dominion Bank

2,758

333,658

UBS Group AG

15,960

874,261

$3,517,572

Hardware, Peripherals, & Assembly – 5.6%

Capgemini SE

3,610

$449,720

Hitachi Ltd.

12,920

439,806

NEC Corp.

7,920

243,326

Samsung Electronics Co. Ltd.

1,391

264,255

$1,397,107

Insurance – 3.8%

Manulife Financial Corp.

7,486

$317,545

Sompo Holdings, Inc.

4,978

213,454

Willis Towers Watson PLC

1,254

424,542

$955,541

Machinery & Tools – 0.5%

Daikin Industries Ltd.

988

$130,837

Media – 5.3%

Informa PLC

25,042

$305,862

Publicis Groupe S.A.

4,601

539,506

Wolters Kluwer N.V.

6,004

494,034

$1,339,402

Medical Equipment – 1.5%

Smith & Nephew PLC

26,448

$380,769

Metals & Mining – 4.9%

Glencore PLC

78,660

$634,816

Rio Tinto PLC

5,700

592,702

$1,227,518

Non-Global Systemically Important Banks – 14.1%

ABN AMRO Group N.V., GDR

6,688

$324,022

AIB Group PLC

35,264

449,136

Bank of Ireland Group PLC

21,356

470,943

BPER Banca S.p.A.

29,260

484,450

Eurobank S.A.

29,128

155,161

FinecoBank S.p.A.

8,626

237,663

NatWest Group PLC

116,014

1,068,010

2


MFS Active International Value ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Non-Global Systemically Important Banks – continued

Resona Holdings, Inc.

21,850

$346,044

$3,535,429

Pharmaceuticals & Biotechnology – 5.1%

GSK PLC

14,540

$365,171

Roche Holding AG

902

393,673

Sanofi S.A.

5,669

505,780

$1,264,624

Retail & E-commerce – 0.7%

Alibaba Group Holding Ltd., ADR

1,558

$177,643

Semiconductor & Electronic Components – 0.9%

NXP Semiconductors N.V.

950

$213,408

Telecom Services – 0.9%

Koninklijke KPN N.V.

44,536

$213,751

Tobacco – 3.5%

British American Tobacco PLC

11,033

$617,274

Imperial Brands PLC

7,866

269,339

$886,613

Travel, Gaming, & Lodging – 1.8%

Ryanair Holdings PLC, ADR

8,284

$458,685

Utilities – 3.5%

E.ON SE

17,024

$351,981

National Grid PLC

33,326

528,334

$880,315

Total Common Stocks (Identified Cost, $23,195,427)

$24,253,965

Preferred Stocks – 2.2%

Consumer Products – 2.2%

Henkel AG & Co. KGaA (Identified Cost, $496,488)

6,270

$553,793

Mutual Funds – 0.6%

Money Market Funds – 0.6%

State Street Institutional U.S. Government Money Market Fund - Premier Class, 3.62% (j) (Identified Cost, $145,267)

145,267

$145,267

Other Assets, Less Liabilities – 0.5%

119,787

Net Assets – 100.0%

$25,072,812

(a)

Non-income producing security.

(j)

The rate quoted is the annualized seven-day yield of the fund at period end.

The following abbreviations are used in this report and are defined:

ADR

American Depositary Receipt

GDR

Global Depositary Receipt

See Notes to Financial Statements

3


MFS Active International Value ETF

Financial Statements | Statement of Assets and Liabilities

This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund. 

At 8/31/26 (unaudited)

Assets

Investments in unaffiliated issuers, at value (identified cost, $23,837,182)

$24,953,025

Foreign currency, at value (identified cost, $30,195)

30,469

Receivables for

Interest and dividends

90,881

Total assets

$25,074,375

Liabilities

Payable to affiliates

Investment adviser

$1,563

Total liabilities

$1,563

Net assets

$25,072,812

Net assets consist of

Paid-in capital

$23,835,348

Total distributable earnings (loss)

1,237,464

Net assets

$25,072,812

Shares of beneficial interest outstanding (unlimited number of shares authorized)

950,000

Net asset value per share (net assets of $25,072,812 / 950,000 shares of beneficial interest outstanding)

$26.39

See Notes to Financial Statements

4


MFS Active International Value ETF

Financial Statements | Statement of Operations

This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. 

Six months ended 8/31/26 (c) (unaudited)

Net investment income (loss)

Income

Dividends from unaffiliated issuers

$132,562

Other

61

Foreign taxes withheld

(6,365

)

Total investment income

$126,258

Expenses

Management fee

$28,752

Miscellaneous

12

Total expenses

$28,764

Net investment income (loss)

$97,494

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers

$(5,227

)

Foreign currency

1,324

In-kind redemptions – unaffiliated issuers

27,576

Net realized gain (loss)

$23,673

Change in unrealized appreciation or depreciation

Unaffiliated issuers

$1,115,843

Translation of assets and liabilities in foreign currencies

454

Net unrealized gain (loss)

$1,116,297

Net realized and unrealized gain (loss)

$1,139,970

Change in net assets from operations

$1,237,464

(c) For the period from the commencement of the fund’s investment operations, June 4, 2026, through the stated period end.

See Notes to Financial Statements

5


MFS Active International Value ETF

Financial Statements |  Statement of Changes in Net Assets

This statement describes the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. 

Six months ended


8/31/26(c)

(unaudited)

Change in net assets

From operations

Net investment income (loss)

$97,494

Net realized gain (loss)

23,673

Net unrealized gain (loss)

1,116,297

Change in net assets from operations

$1,237,464

Change in net assets from fund share transactions

$23,846,486

Miscellaneous capital

$(11,138

)

Total change in net assets

$25,072,812

Net assets

At beginning of period

—

At end of period

$25,072,812

(c)

For the period from the commencement of the fund’s investment operations, June 4, 2026, through the stated period end.

See Notes to Financial Statements

6


MFS Active International Value ETF

Financial Statements | Financial Highlights

The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years (or life of the fund, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund (assuming reinvestment of all distributions) held for the entire period. 

Six months

ended

8/31/26 (c)

(unaudited)

Net asset value, beginning of period

$24.91

Income (loss) from investment operations

Net investment income (loss) (d)

$0.12

Net realized and unrealized gain (loss)

1.37

Total from investment operations

$1.49

Miscellaneous capital (d)

$(0.01

)

Net asset value, end of period (x)

$26.39

Total return (%) (s)(x)

5.93

(n)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses

0.57

(a)

Net investment income (loss)

1.93

(a)

Portfolio turnover rate (e)

2

(n)

Net assets at end of period (000 omitted)

$25,073

(a)

Annualized.

(c)

For the period from the commencement of the fund’s investment operations, June 4, 2026, through the stated period end.

(d)

Per share data is based on average shares outstanding.

(e)

Portfolio turnover rate excludes securities received or delivered in-kind in the process of creating or redeeming fund shares.

(n)

Not annualized.

(s)

From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.

(x)

The net asset value and total return have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted

accounting principles required at period end for financial reporting purposes.

See Notes to Financial Statements

7


MFS Active International Value ETF

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS Active International Value ETF (the fund) is a diversified series of MFS Active Exchange Traded Funds Trust (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

(2) Significant Accounting Policies

General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued. The fund invests in foreign securities. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country’s market, economic, industrial, political, regulatory, geopolitical, environmental, public health, and other conditions.

Segment Reporting — An operating segment is defined in FASB Accounting Standards Codification Topic 280, Segment Reporting as a component of a public entity that engages in business activities from which it may recognize revenues and incur expenses, has operating results that are regularly reviewed by the entity’s chief operating decision maker (CODM) in making resource allocation decisions and assessing segment performance, and for which discrete financial information is available. The fund represents a single operating segment and the Chairman’s Committee of the fund's adviser acts as the segment’s CODM. The fund’s total returns, expense ratios, and changes in net assets which are used by the CODM to assess segment performance and to make resource allocation decisions to the segment are consistent with that presented within the fund’s financial statements.

Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.

Investment Valuations — Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.

Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data.

8


MFS Active International Value ETF

Notes to Financial Statements (unaudited) - continued 

An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of August 31, 2026 in valuing the fund's assets and liabilities:

Financial Instruments

Level 1

Level 2

Level 3

Total

Equity Securities

$24,807,758

$—

$—

$24,807,758

Investment Companies

145,267

—

—

145,267

Total

$24,953,025

$—

$—

$24,953,025

For further information regarding security characteristics, see the Portfolio of Investments.

Foreign Currency Translation — Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions or on the reporting date for foreign denominated receivables and payables. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on receivables, payables, income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed.

Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.

Investment Transactions and Income —  Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend payments received in additional securities are recorded on the ex-dividend date in an amount equal to the value of the security on such date.

The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.

Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.

Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for generally a three-year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign

9


MFS Active International Value ETF

Notes to Financial Statements (unaudited) - continued 

taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.

Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.

The federal tax cost and the tax basis components of distributable earnings were as follows: 

As of 8/31/26

Cost of investments

$23,837,182

Gross appreciation

1,623,730

Gross depreciation

(507,887

)

Net unrealized appreciation (depreciation)

$1,115,843

(3) Transactions with Affiliates

Investment Adviser — The fund has an Investment Management Agreement (“Management Agreement”) with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.57% of the fund’s average daily net assets. Under the Management Agreement, MFS will pay substantially all the fund’s operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), litigation expenses, the cost of proxy solicitations and shareholder meetings, the fee paid to MFS pursuant to this agreement, and such other expenses as approved by a majority of the fund’s Board of Trustees.

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly owned subsidiary of MFS, is the distributor of shares of the fund. The fund has adopted a plan in accordance with Rule 12b-1 under the Investment Company Act of 1940, as amended (the Distribution Plan). The fund’s Board of Trustees has determined not to implement payments of Rule 12b-1 fees under the Distribution Plan at this time. The fund does not currently pay compensation to MFD for any distribution services provided.

Administrator — MFS provides certain financial, legal, and other administrative services to the fund. MFS bears the costs of the services under the Management Agreement.

Trustees’ and Officers’ Compensation — Under the Management Agreement, MFS pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. MFS also pays compensation to Trustees or officers of the fund who are also officers of the investment adviser for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS and MFD. The fund did not pay any compensation to the independent Trustees for the period ended August 31, 2026.

Other — At August 31, 2026, MFS held approximately 88% of the outstanding shares of the fund.

(4) Portfolio Securities

For the period ended August 31, 2026, purchases and sales of investments, other than short-term obligations and in-kind transactions, aggregated $1,528,792 and $552,209, respectively. Securities received and delivered in-kind through subscriptions and redemptions aggregated $22,880,617 and $187,634, respectively.

(5) Purchase and Sales of Fund Shares

The fund issues and redeems shares through MFD at net asset value (“NAV”) only with Authorized Participants and only in large blocks of shares (each, a Creation Unit). An Authorized Participant may purchase or redeem a Creation Unit each business day that the fund is open in exchange for the delivery or receipt of a designated portfolio of in-kind securities and/or cash. Authorized Participants may pay a fixed purchase or redemption transaction fee to offset the transfer and other transaction costs associated with the issuance and redemption of Creation Units.  An additional variable fee may be charged for certain transactions. These variable fees are included in “Miscellaneous capital” in the Statement of Changes in Net Assets.

10


MFS Active International Value ETF

Notes to Financial Statements (unaudited) - continued 

Individual fund shares may not be purchased or redeemed directly with the fund. Shares are listed for trading on the NYSE Arca, and individual fund shares may only be purchased and sold in the secondary market through a financial intermediary at market price. Because the fund’s shares will trade at market prices rather than NAV, shares may trade at prices greater than NAV (at a premium), at NAV, or less than NAV (at a discount). Transactions in fund shares were as follows: 

Six months ended

8/31/26 (c)

Shares

Amount

Shares sold

1,000,000

$25,165,910

Shares reacquired

(50,000

)

(1,319,424

)

Net change

950,000

$23,846,486

(c)

For the period from the commencement of the fund’s investment operations, June 4, 2026, through the stated period end.

11


ITEM 8. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active International Value ETF.

ITEM 9.  PROXY DISCLOSURES FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Active International Value ETF.

ITEM 10. REMUNERATION PAID TO DIRECTORS, OFFICERS, AND OTHERS OF OPEN-END MANAGEMENT INVESTMENT COMPANIES.

This information is disclosed as part of the financial statements included in Item 7 above for MFS Active International Value ETF. See the Statement of Operations and Note 3 within the Notes to Financial Statements for more information.

ITEM 11. STATEMENT REGARDING BASIS FOR APPROVAL OF INVESTMENT ADVISORY CONTRACT.

12


MFS Active International Value ETF

Board Approval of Investment Management Agreement

MFS Active International Value ETF   

The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested (“independent”) Trustees, voting separately, initially approve the Fund’s investment management agreement with MFS (the “Agreement”) and, beginning on the second anniversary of the initial effective date of the Agreement, annually approve the continuation of the Agreement. In March and April 2026, the Board met to consider the initial approval of the Agreement (“the initial review meetings”). The independent Trustees were assisted in their evaluation of the Agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS.

In connection with their deliberations regarding the initial approval of the Agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services to be performed by MFS under the Agreement and other arrangements with the Fund. The independent Trustees observed that with respect to this Fund, MFS was proposing a unitary management fee structure, pursuant to which MFS would receive a fee covering investment management and administrative services, with MFS paying the Fund’s ordinary, recurring operating expenses (the “Unitary Fee”), subject to certain exceptions.

In connection with their initial review meetings, the Trustees received and relied upon materials that included, among other items: (i) information provided by Broadridge Financial Solutions Inc. (“Broadridge”), an independent third party, on the Fund’s proposed Unitary Fee and the advisory fees and other expenses of comparable funds identified by Broadridge, as well as all other funds in the same investment classification/category (the “Broadridge expense group and universe”), (ii) information provided by MFS on the total expense ratios for Class R6 shares of MFS mutual funds in the same Morningstar category as the Fund, and (iii) the Unitary Fees for certain fully transparent actively-managed exchange-traded funds (“ETFs”) in similar Morningstar categories that MFS believes will be key competitors to the Fund. In addition, in connection with the independent Trustees’ May, June, and July 2025 meetings for the purpose of considering whether to approve the continuation of the investment advisory agreements for the MFS-advised mutual funds that the Board oversees (the “MFS Funds”), the independent Trustees received: (i) information provided by MFS on the advisory fees of portfolios of other clients of MFS, including institutional separate accounts, (ii) information regarding MFS’ financial results and financial condition, including MFS’ and certain of its affiliates’ estimated profitability from services performed for the MFS Funds as a whole, and compared to MFS’ institutional business, (iii) MFS’ views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (iv) descriptions of various functions performed by MFS for the MFS Funds, such as compliance monitoring and portfolio trading practices, and (v) information regarding the overall organization of MFS, including information about MFS’ senior management and other personnel that would provide investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative fee and expense information prepared and provided by Broadridge was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS.

The Trustees’ conclusion as to the initial approval of the Agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor. Some of the factors that figured particularly in the Trustees’ deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors. Because the Fund is newly organized and had not yet commenced investment operations at the time of the initial review meetings, the Fund had no investment performance for the Trustees to review.

The Trustees considered the proposed Unitary Fee structure to which the Fund would be subject, observing that many of the competitors of the Fund have adopted similar unitary fee structures. In assessing the reasonableness of the Fund’s proposed Unitary Fee, the Trustees considered, among other things, information on unitary fee structures generally, as well as the terms of the Agreement and descriptions of various services to be performed or procured by MFS under the Agreement, including portfolio management and portfolio trading practices and administrative services. The Trustees considered the categories of expenses which would be excluded from the Unitary Fee and therefore would be payable by the Fund. The Trustees also considered the Fund’s proposed Unitary Fee as compared with the advisory fee and total expense ratios of peer groups of funds based on information provided by Broadridge. The Trustees considered that, according to the data provided by Broadridge, the Fund's proposed Unitary Fee and proposed total expense ratio would each be approximately at the applicable Broadridge expense group median.

The Trustees considered that the Agreement provides for a unitary fee level that does not include pre-established breakpoints, and considered MFS’ observation that while fee waivers, breakpoints, and expense caps are common for mutual funds, these arrangements are not typically used by ETFs.

The Trustees did not consider MFS’ costs and profits with respect to the Fund because the Fund had not yet commenced operations. The Trustees considered information prepared by MFS relating to MFS’ costs and profits with respect to the MFS Funds considered as a group, and other investment companies and institutional accounts advised by MFS, as well as MFS’ methodologies used to determine and allocate its costs to the MFS Funds and other accounts and products for purposes of estimating profitability.

13


MFS Active International Value ETF

Board Approval of Investment Management Agreement - continued

After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the Agreement, that the Unitary Fee to be charged to the Fund represents reasonable compensation in light of the services to be provided by MFS to the Fund.

In addition, the Trustees considered MFS’ resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund. The Trustees also considered current and developing conditions in the financial services industry, including the presence of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies. In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc. The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser that also serves other investment companies as well as other accounts.

The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services to be provided to the Fund by MFS and its affiliates under agreements and plans other than the Agreement. The Trustees also considered the nature, extent and quality of certain other services MFS may perform or arrange for on the Fund’s behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS’ interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services to be provided by MFS and its affiliates on behalf of the Fund were satisfactory.

The Trustees considered so-called “fall-out benefits” to MFS such as reputational value derived from serving as investment manager to the MFS Funds. The Trustees also considered that MFS discontinued its historic practice of obtaining investment research from portfolio brokerage commissions paid by certain MFS Funds effective January 2018, and directly pays or voluntarily reimburses a Fund, if applicable, for the costs of external research acquired through the use of the Fund’s portfolio brokerage commissions.

Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including the independent Trustees, concluded that the Fund’s Agreement with MFS should be approved for an initial two-year period, commencing upon its effective date, as set forth in the Agreement.

14


MFS Blended Research Small-Mid Cap ETF

ITEM 7.  FINANCIAL STATEMENTS AND FINANCIAL HIGHLIGHTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

MFS Blended Research Small-Mid Cap ETF

Portfolio of Investments − 8/31/26 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

Issuer

Shares/Par

Value ($)

Common Stocks – 99.7%

Aerospace & Defense – 2.6%

BWX Technologies, Inc.

742

$112,999

Curtiss-Wright Corp.

271

157,866

Huntington Ingalls Industries, Inc.

212

61,735

Leonardo DRS, Inc.

2,438

92,644

Moog, Inc., “A”

116

43,094

RBC Bearings, Inc. (a)

177

87,484

Textron, Inc.

2,013

162,167

$717,989

Apparel, Footwear, & Accessories – 1.4%

Columbia Sportswear Co.

1,622

$93,103

PVH Corp.

241

17,873

Reformation, Inc. (a)

4,184

59,873

Wolverine World Wide, Inc.

10,603

209,197

$380,046

Auto & Auto Components – 1.0%

Aptiv PLC (a)

923

$41,313

Dana, Inc.

742

22,245

Garrett Motion, Inc.

1,205

32,475

Group 1 Automotive, Inc.

68

18,329

Lear Corp.

848

105,991

Modine Manufacturing Co. (a)

318

56,741

$277,094

Brokerage & Asset Managers – 4.0%

Compass Diversified Holdings (a)

1,166

$13,479

Evercore Partners, Inc.

212

60,723

GCM Grosvenor, Inc., “A”

14,513

200,134

Hamilton Lane, Inc., “A”

517

56,260

Marex Group Ltd.

281

20,367

PJT Partners, Inc.

954

172,092

StoneX Group, Inc. (a)

367

25,132

TPG, Inc.

3,601

194,886

WisdomTree Investments, Inc.

8,050

193,683

XP, Inc.

8,686

158,346

$1,095,102

Business Services – 2.3%

CoStar Group, Inc. (a)

742

$23,796

Dropbox, Inc. (a)

927

32,621

GigaCloud Technology, Inc. (a)

471

22,858

GoDaddy, Inc. (a)

2,092

204,765

Innodata, Inc. (a)

212

11,961

Remitly Global, Inc. (a)

2,544

68,027

TransUnion

424

36,002

TriNet Group, Inc.

1,487

104,521

ESMFS-SEM

1


MFS Blended Research Small-Mid Cap ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Business Services – continued

WEX, Inc. (a)

725

$138,170

$642,721

Chemicals – 2.4%

Albemarle Corp.

1,239

$167,228

Avient Corp.

4,237

186,682

Chemours Co.

4,283

66,644

Compass Minerals International, Inc. (a)

1,041

25,879

Eastman Chemical Co.

2,226

161,252

Huntsman Corp.

4,343

41,606

Orion S.A.

3,181

19,849

$669,140

Construction – 2.5%

Hovnanian Enterprises, Inc., “A” (a)

636

$78,947

KB Home

1,656

88,265

Masco Corp.

1,484

107,085

Meritage Homes Corp.

536

37,214

Simpson Manufacturing Co., Inc.

1,177

214,932

SiteOne Landscape Supply, Inc. (a)

1,637

161,294

$687,737

Consumer Products – 0.8%

Helen of Troy Ltd. (a)

1,937

$58,304

Herbalife Ltd. (a)

5,085

55,884

Newell Brands, Inc.

2,578

16,112

Prestige Consumer Healthcare, Inc. (a)

1,546

80,052

$210,352

Consumer Services – 1.3%

Bright Horizons Family Solutions, Inc. (a)

520

$38,573

Maplebear, Inc. (a)

2,332

117,813

Phoenix Educations Partners, Inc.

5,816

169,304

Strategic Education, Inc.

415

34,379

$360,069

Containers – 0.4%

Avery Dennison Corp.

694

$120,832

Diversified Financial Services – 1.0%

Bread Financial Holdings, Inc.

954

$99,664

Happen, Inc. (a)

3,813

67,033

Sezzle, Inc. (a)

212

25,557

SLM Corp.

3,389

88,012

$280,266

Electrical Equipment – 2.4%

Advanced Drainage Systems, Inc.

1,484

$201,423

Daktronics, Inc. (a)

954

18,632

EnerSys

503

92,481

nVent Electric PLC

1,484

223,713

Powell Industries, Inc.

68

12,222

TriMas Corp.

1,688

65,461

2


MFS Blended Research Small-Mid Cap ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Electrical Equipment – continued

Versigent PLC

848

$40,195

$654,127

Energy - Independent – 1.8%

Antero Resources Corp. (a)

5,191

$199,750

Chord Energy Corp.

1,060

155,936

HF Sinclair Corp.

348

35,360

Riley Exploration Permian, Inc.

530

20,686

Talos Energy, Inc. (a)

5,060

87,336

$499,068

Energy - Renewables – 0.3%

Generac Holdings, Inc. (a)

106

$19,650

Green Plains, Inc. (a)

4,131

59,693

$79,343

Engineering - Construction – 2.9%

Argan, Inc.

106

$45,049

Comfort Systems USA, Inc.

33

51,005

Fluor Corp. (a)

1,908

104,005

Jacobs Solutions, Inc.

1,269

189,144

Legence Corp., “A” (a)

1,272

68,141

MYR Group, Inc. (a)

625

182,138

Primoris Services Corp.

1,060

76,437

Tutor Perini Corp.

954

84,448

$800,367

Entertainment & Leisure – 2.4%

Brunswick Corp.

2,332

$176,999

Corsair Gaming, Inc. (a)

12,360

150,174

Madison Square Garden Entertainment Corp. (a)

369

28,668

Malibu Boats, Inc., “A” (a)

424

11,431

New York Times Co., “A”

1,728

116,242

Outfront Media, Inc., REIT

1,378

40,486

Polaris, Inc.

1,810

116,817

Sturm Ruger & Co., Inc.

358

13,593

USA Today Co., Inc. (a)

1,572

9,888

$664,298

Food & Beverages – 1.1%

Celsius Holdings, Inc. (a)

560

$17,612

J.M. Smucker Co.

1,440

188,870

Seneca Foods Corp., “A” (a)

424

84,075

Vita Coco Co., Inc. (a)

317

18,613

$309,170

Food & Drug Stores – 0.7%

Albertsons Cos., Inc., “A”

16,176

$199,774

Hardware, Peripherals, & Assembly – 3.4%

Box, Inc., “A” (a)

8,156

$291,822

Coherent Corp. (a)

223

61,956

EPAM Systems, Inc. (a)

106

12,490

3


MFS Blended Research Small-Mid Cap ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Hardware, Peripherals, & Assembly – continued

Globant S.A. (a)

1,316

$53,574

MediaAlpha, Inc., “A” (a)

4,624

58,355

Pitney Bowes, Inc.

6,145

105,264

Q2 Holdings, Inc. (a)

530

34,471

Rubrik, Inc., “A” (a)

531

49,404

TD Synnex Corp.

199

50,317

Workiva, Inc. (a)

318

25,440

Zebra Technologies Corp., “A” (a)

530

187,382

$930,475

Health Maintenance Organizations – 0.1%

Molina Healthcare, Inc. (a)

107

$21,268

Insurance – 4.3%

AXIS Capital Holdings Ltd.

1,908

$188,472

Equitable Holdings, Inc.

4,025

201,773

Everest Group Ltd.

719

269,374

Hanover Insurance Group, Inc.

106

23,968

Jackson Financial, Inc.

317

42,297

Lincoln National Corp.

6,145

261,716

Pelagos Insurance Capital Ltd.

766

18,698

RenaissanceRe Holdings Ltd.

244

79,944

Voya Financial, Inc.

935

94,734

$1,180,976

Internet – 0.6%

Cars.com, Inc. (a)

4,131

$48,332

Etsy, Inc. (a)

1,378

112,073

$160,405

Machinery & Tools – 4.0%

AGCO Corp.

1,908

$225,736

Applied Industrial Technologies, Inc.

41

13,283

Eastman Kodak Co. (a)

3,707

33,289

Flowserve Corp.

2,753

217,735

Nordson Corp.

650

209,118

Pentair PLC

1,166

70,496

Terex Corp.

2,094

132,990

Timken Co.

1,696

204,283

$1,106,930

Media – 1.4%

Roku, Inc. (a)

1,908

$299,423

TKO Group Holdings, Inc.

530

96,783

$396,206

Medical & Health Technology & Services – 3.9%

Agilon Health, Inc. (a)

212

$18,633

AMN Healthcare Services, Inc. (a)

2,544

87,208

Azenta, Inc. (a)

3,495

114,112

Charles River Laboratories International, Inc. (a)

636

183,321

Chemed Corp.

98

50,834

Fortrea Holdings, Inc. (a)

3,177

58,361

4


MFS Blended Research Small-Mid Cap ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Medical & Health Technology & Services – continued

Lumexa Imaging Holdings, Inc. (a)

1,696

$19,792

Nutex Health, Inc. (a)

106

20,008

Pediatrix Medical Group, Inc. (a)

3,283

86,113

Tenet Healthcare Corp. (a)

636

169,119

Universal Health Services, Inc.

1,582

269,462

$1,076,963

Medical Equipment – 1.9%

Align Technology, Inc. (a)

848

$135,502

Avantor, Inc. (a)

3,179

46,223

Bio-Rad Laboratories, Inc., “A” (a)

212

81,857

Bioventus, Inc., “A” (a)

1,908

26,044

Embecta Corp.

6,675

34,309

Envista Holdings Corp. (a)

7,205

195,544

Myriad Genetics, Inc. (a)

2,549

8,208

$527,687

Metals & Mining – 2.7%

Alcoa Corp.

1,696

$84,715

ATI, Inc. (a)

530

108,226

Caledonia Mining Corp. PLC

2,753

69,678

Carpenter Technology Corp.

106

50,500

Coeur Mining, Inc.

6,993

145,315

Hecla Mining Co.

4,237

84,189

NioCorp Developments Ltd. (a)

2,226

9,327

Ryerson Holding Corp.

424

10,625

SSR Mining, Inc.

4,237

159,354

USA Rare Earth, Inc. (a)

636

11,334

$733,263

Network & Telecom – 0.2%

Ciena Corp. (a)

154

$58,951

Non-Global Systemically Important Banks – 6.6%

Banc of California, Inc.

7,205

$134,157

Beacon Financial Corp.

6,993

217,133

Carter Bankshares, Inc.

1,689

52,764

Cathay General Bancorp, Inc.

3,919

239,882

Dave, Inc. (a)

106

38,109

Eagle Bancorp, Inc.

2,786

76,030

Hanmi Financial Corp.

2,226

69,006

Hope Bancorp, Inc.

5,810

80,120

Metro Bank Holdings PLC

636

57,736

Midland States Bancorp, Inc.

2,859

93,747

Northpointe Bancshares, Inc.

4,243

72,089

OceanFirst Financial Corp.

698

13,150

Peapack-Gladstone Financial Corp.

1,802

80,441

Popular, Inc.

1,590

267,422

UMB Financial Corp.

1,696

240,204

Western Alliance Bancorp.

1,166

91,100

$1,823,090

5


MFS Blended Research Small-Mid Cap ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Oil Services – 2.0%

Forum Energy Technologies, Inc. (a)

1,060

$86,888

Nabors Industries Ltd. (a)

212

19,852

Oil States International, Inc. (a)

6,357

56,069

Patterson-UTI Energy, Inc.

5,085

64,274

TechnipFMC PLC

4,025

314,554

$541,637

Pharmaceuticals & Biotechnology – 8.0%

ACADIA Pharmaceuticals, Inc. (a)

2,438

$70,483

AnaptysBio, Inc. (a)

742

42,316

Arvinas, Inc. (a)

4,661

42,881

Ascendis Pharma A.S., ADR (a)

331

87,066

Biomarin Pharmaceutical, Inc. (a)

1,836

119,762

CG Oncology, Inc. (a)

636

47,802

Cogent Biosciences, Inc. (a)

1,696

59,360

Corcept Therapeutics, Inc. (a)

530

60,075

Cullinan Therapeutics, Inc. (a)

1,166

25,734

Cytokinetics, Inc. (a)

1,060

75,165

Exelixis, Inc. (a)

1,237

67,590

Harmony Biosciences Holdings (a)

2,076

81,753

Indivior Pharmaceuticals, Inc. (a)

1,166

40,728

Inhibrx Biosciences, Inc. (a)

242

30,661

Ionis Pharmaceuticals, Inc. (a)

1,057

63,800

Jazz Pharmaceuticals PLC (a)

530

132,860

Kiniksa Pharmaceuticals International PLC (a)

800

62,904

Kymera Therapeutics, Inc. (a)

742

88,157

Liquidia Corp. (a)

212

14,452

Mirum Pharmaceuticals, Inc. (a)

916

89,814

Nature's Sunshine Products, Inc. (a)

1,272

17,999

Neurocrine Biosciences, Inc. (a)

954

146,945

Novavax, Inc. (a)

6,066

56,838

Oruka Therapeutics, Inc. (a)

848

78,542

Pacira BioSciences, Inc. (a)

2,830

73,297

Praxis Precision Medicines, Inc. (a)

212

74,264

PTC Therapeutics, Inc. (a)

424

29,485

Revolution Medicines, Inc. (a)

494

101,551

Sarepta Therapeutics, Inc. (a)

2,332

49,042

Syndax Pharmaceuticals, Inc. (a)

692

13,349

Tarsus Pharmaceuticals, Inc. (a)

613

45,509

Travere Therapeutics, Inc. (a)

742

49,180

Ultragenyx Pharmaceutical, Inc. (a)

2,156

54,353

Vanda Pharmaceuticals, Inc. (a)

1,696

9,158

Viatris, Inc.

3,535

58,363

Zymeworks, Inc. (a)

1,590

46,762

$2,208,000

Real Estate – 3.9%

CBL & Associates Properties, Inc., REIT

1,590

$86,957

Essential Properties Realty Trust, REIT

7,422

222,660

Federal Realty Investment Trust, REIT

742

86,094

Four Corners Property Trust, Inc., REIT

8,349

207,723

Jones Lang LaSalle, Inc. (a)

424

155,129

St. Joe Co.

207

13,683

Urban Edge Properties, REIT

6,761

143,063

6


MFS Blended Research Small-Mid Cap ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Real Estate – continued

W.P. Carey, Inc., REIT

1,833

$128,236

Xenia Hotels & Resorts Inc., REIT

848

15,900

$1,059,445

Real Estate - Storage & Office – 1.7%

Easterly Government Properties, Inc., REIT

2,753

$67,531

Highwoods Properties, Inc., REIT

4,065

124,389

Piedmont Office Realty Trust, Inc., REIT (a)

22,778

217,986

Postal Realty Trust, Inc., “A”, REIT

2,965

69,529

$479,435

Restaurants – 2.1%

Aramark

5,085

$286,336

Bloomin Brands, Inc. (a)

8,156

84,007

Cava Group, Inc. (a)

1,060

69,695

Dutch Bros, Inc., “A” (a)

318

15,537

First Watch Restaurant Group, Inc. (a)

2,120

26,882

Texas Roadhouse, Inc.

483

94,475

$576,932

Retail & E-commerce – 2.3%

Bath & Body Works, Inc.

3,916

$75,383

BJ's Wholesale Club Holdings, Inc. (a)

1,060

96,089

Capri Holdings Ltd. (a)

3,919

51,927

Carter's, Inc.

1,802

58,367

Gap, Inc.

10,193

227,406

Rush Enterprises, Inc., “A”

954

73,296

Signet Jewelers Ltd.

530

43,608

$626,076

Semiconductor & Electronic Components – 4.2%

Advanced Energy Industries, Inc.

530

$146,736

Allegro MicroSystems, Inc. (a)

1,026

37,192

Ambarella, Inc. (a)

318

22,063

Amkor Technology, Inc.

1,940

91,762

Benchmark Electronics, Inc.

212

14,899

Cirrus Logic, Inc. (a)

636

69,648

Diodes, Inc. (a)

1,060

96,248

Flex Ltd. (a)

883

96,468

Formfactor, Inc. (a)

1,414

142,263

Kulicke & Soffa Industries, Inc.

530

42,432

MACOM Technology Solutions Holdings, Inc. (a)

212

55,932

MaxLinear, Inc., “A” (a)

882

52,841

Penguin Solutions, Inc. (a)

294

14,429

Photronics, Inc. (a)

1,166

32,811

Rambus, Inc. (a)

653

56,609

Sanmina Corp. (a)

150

29,508

TTM Technologies, Inc. (a)

636

75,633

Ultra Clean Holdings, Inc. (a)

212

14,380

VICOR Corp. (a)

212

39,788

Vishay Intertechnology, Inc.

530

16,128

$1,147,770

7


MFS Blended Research Small-Mid Cap ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Software – 6.7%

Appian Corp. (a)

1,010

$43,380

BILL Holdings, Inc. (a)

5,435

267,565

CCC Intelligent Holdings, Inc. (a)

5,191

38,725

Clear Secure, Inc., “A”

1,484

65,519

DigitalOcean, Inc. (a)

324

35,864

Elastic N.V. (a)

1,492

145,545

Guidewire Software, Inc. (a)

212

43,407

HubSpot, Inc. (a)

106

27,704

JFrog Ltd. (a)

1,278

127,889

Okta, Inc. (a)

1,328

229,797

Paycom Software, Inc.

424

101,378

Paylocity Holding Corp. (a)

562

90,044

Pegasystems, Inc.

5,765

212,210

Qualys, Inc. (a)

636

118,385

RingCentral, Inc.

636

44,278

Teradata Corp. (a)

2,438

70,702

UiPath, Inc., “A” (a)

1,802

33,643

Unity Software, Inc. (a)

424

17,850

Upwork, Inc. (a)

7,944

71,734

Vertex, Inc., “A” (a)

1,060

15,010

Zeta Global Holdings Corp. (a)

969

30,010

$1,830,639

Special Products & Services – 0.1%

Pangaea Logistics Solutions Ltd.

4,791

$38,903

Telecom Services – 1.0%

EchoStar Corp., “A” (a)

530

$45,813

Iridium Communications, Inc.

2,226

104,577

Liberty Capital Corp., “C” (a)

2,769

72,077

Lumen Technologies, Inc. (a)

5,827

36,419

Millicom International Cellular S.A.

106

9,939

$268,825

Tobacco – 0.2%

Mativ Holdings, Inc.

3,919

$46,597

Transportation & Logistics – 0.9%

Ardmore Shipping Corp.

1,908

$33,180

Costamare, Inc.

3,601

55,023

Teekay Tankers Ltd.

424

38,008

XPO, Inc. (a)

672

130,361

$256,572

Travel, Gaming, & Lodging – 2.8%

Allegiant Travel Co. (a)

744

$56,581

American Airlines Group, Inc. (a)

2,355

31,627

Boyd Gaming Corp.

1,590

123,368

DiamondRock Hospitality Co., REIT

1,038

12,778

DraftKings, Inc. (a)

954

23,173

Host Hotels & Resorts, Inc., REIT

8,474

185,835

Pebblebrook Hotel Trust, REIT

4,555

82,536

Penn Entertainment, Inc. (a)

5,708

95,381

8


MFS Blended Research Small-Mid Cap ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Travel, Gaming, & Lodging – continued

Ryman Hospitality Properties, Inc., REIT

1,230

$155,915

$767,194

Utilities – 3.4%

New Jersey Resources Corp.

226

$12,055

ONE Gas, Inc.

207

16,409

Portland General Electric Co.

4,237

207,020

Southwest Gas Holdings, Inc.

1,933

170,742

Spire, Inc.

961

78,648

Talen Energy Corp. (a)

730

215,905

UGI Corp.

6,277

241,350

$942,129

Total Common Stocks (Identified Cost, $26,475,370)

$27,453,863

Mutual Funds – 0.2%

Money Market Funds – 0.2%

State Street Institutional U.S. Government Money Market Fund - Premier Class, 3.62% (j) (Identified Cost, $52,646)

52,646

$52,646

Other Assets, Less Liabilities – 0.1%

18,907

Net Assets – 100.0%

$27,525,416

(a)

Non-income producing security.

(j)

The rate quoted is the annualized seven-day yield of the fund at period end.

The following abbreviations are used in this report and are defined:

ADR

American Depositary Receipt

REIT

Real Estate Investment Trust

See Notes to Financial Statements

9


MFS Blended Research Small-Mid Cap ETF

Financial Statements | Statement of Assets and Liabilities

This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund. 

At 8/31/26 (unaudited)

Assets

Investments in unaffiliated issuers, at value (identified cost, $26,528,016)

$27,506,509

Receivables for

Dividends

20,065

Total assets

$27,526,574

Liabilities

Payable to affiliates

Investment adviser

$1,158

Total liabilities

$1,158

Net assets

$27,525,416

Net assets consist of

Paid-in capital

$26,577,774

Total distributable earnings (loss)

947,642

Net assets

$27,525,416

Shares of beneficial interest outstanding (unlimited number of shares authorized)

1,060,000

Net asset value per share (net assets of $27,525,416 / 1,060,000 shares of beneficial interest outstanding)

$25.97

See Notes to Financial Statements

10


MFS Blended Research Small-Mid Cap ETF

Financial Statements | Statement of Operations

This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. 

Six months ended 8/31/26 (c) (unaudited)

Net investment income (loss)

Income

Dividends from unaffiliated issuers

$79,370

Other

81

Foreign taxes withheld

(43

)

Total investment income

$79,408

Expenses

Management fee

$23,207

Total expenses

$23,207

Net investment income (loss)

$56,201

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers

$(128,902

)

In-kind redemptions – unaffiliated issuers

41,850

Net realized gain (loss)

$(87,052

)

Change in unrealized appreciation or depreciation

Unaffiliated issuers

$978,493

Net realized and unrealized gain (loss)

$891,441

Change in net assets from operations

$947,642

(c) For the period from the commencement of the fund’s investment operations, June 4, 2026, through the stated period end.

See Notes to Financial Statements

11


MFS Blended Research Small-Mid Cap ETF

Financial Statements |  Statement of Changes in Net Assets

This statement describes the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. 

Six months ended


8/31/26(c)

(unaudited)

Change in net assets

From operations

Net investment income (loss)

$56,201

Net realized gain (loss)

(87,052

)

Net unrealized gain (loss)

978,493

Change in net assets from operations

$947,642

Change in net assets from fund share transactions

$26,577,774

Total change in net assets

$27,525,416

Net assets

At beginning of period

—

At end of period

$27,525,416

(c)

For the period from the commencement of the fund’s investment operations, June 4, 2026, through the stated period end.

See Notes to Financial Statements

12


MFS Blended Research Small-Mid Cap ETF

Financial Statements | Financial Highlights

The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years (or life of the fund, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund (assuming reinvestment of all distributions) held for the entire period. 

Six months

ended

8/31/26 (c)

(unaudited)

Net asset value, beginning of period

$24.89

Income (loss) from investment operations

Net investment income (loss) (d)

$0.06

Net realized and unrealized gain (loss)

1.02

Total from investment operations

$1.08

Net asset value, end of period (x)

$25.97

Total return (%) (s)(x)

4.31

(n)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses

0.38

(a)

Net investment income (loss)

0.92

(a)

Portfolio turnover rate (e)

13

(n)

Net assets at end of period (000 omitted)

$27,525

(a)

Annualized.

(c)

For the period from the commencement of the fund’s investment operations, June 4, 2026, through the stated period end.

(d)

Per share data is based on average shares outstanding.

(e)

Portfolio turnover rate excludes securities received or delivered in-kind in the process of creating or redeeming fund shares.

(n)

Not annualized.

(s)

From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.

(x)

The net asset value and total return have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted

accounting principles required at period end for financial reporting purposes.

See Notes to Financial Statements

13


MFS Blended Research Small-Mid Cap ETF

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS Blended Research Small-Mid Cap ETF (the fund) is a diversified series of MFS Active Exchange Traded Funds Trust (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

(2) Significant Accounting Policies

General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued. The fund will generally focus on securities of small size companies which may be more volatile than those of larger companies.

Segment Reporting — An operating segment is defined in FASB Accounting Standards Codification Topic 280, Segment Reporting as a component of a public entity that engages in business activities from which it may recognize revenues and incur expenses, has operating results that are regularly reviewed by the entity’s chief operating decision maker (CODM) in making resource allocation decisions and assessing segment performance, and for which discrete financial information is available. The fund represents a single operating segment and the Chairman’s Committee of the fund's adviser acts as the segment’s CODM. The fund’s total returns, expense ratios, and changes in net assets which are used by the CODM to assess segment performance and to make resource allocation decisions to the segment are consistent with that presented within the fund’s financial statements.

Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.

Investment Valuations — Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.

Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or

14


MFS Blended Research Small-Mid Cap ETF

Notes to Financial Statements (unaudited) - continued 

market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of August 31, 2026 in valuing the fund's assets and liabilities:

Financial Instruments

Level 1

Level 2

Level 3

Total

Equity Securities

$27,453,863

$—

$—

$27,453,863

Investment Companies

52,646

—

—

52,646

Total

$27,506,509

$—

$—

$27,506,509

For further information regarding security characteristics, see the Portfolio of Investments.

Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.

Investment Transactions and Income —  Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend payments received in additional securities are recorded on the ex-dividend date in an amount equal to the value of the security on such date.

The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.

Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.

Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for generally a three-year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.

Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.

15


MFS Blended Research Small-Mid Cap ETF

Notes to Financial Statements (unaudited) - continued 

The federal tax cost and the tax basis components of distributable earnings were as follows: 

As of 8/31/26

Cost of investments

$26,528,872

Gross appreciation

2,607,308

Gross depreciation

(1,629,671

)

Net unrealized appreciation (depreciation)

$977,637

(3) Transactions with Affiliates

Investment Adviser — The fund has an Investment Management Agreement (“Management Agreement”) with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.38% of the fund’s average daily net assets. Under the Management Agreement, MFS will pay substantially all the fund’s operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), litigation expenses, the cost of proxy solicitations and shareholder meetings, the fee paid to MFS pursuant to this agreement, and such other expenses as approved by a majority of the fund’s Board of Trustees.

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly owned subsidiary of MFS, is the distributor of shares of the fund. The fund has adopted a plan in accordance with Rule 12b-1 under the Investment Company Act of 1940, as amended (the Distribution Plan). The fund’s Board of Trustees has determined not to implement payments of Rule 12b-1 fees under the Distribution Plan at this time. The fund does not currently pay compensation to MFD for any distribution services provided.

Administrator — MFS provides certain financial, legal, and other administrative services to the fund. MFS bears the costs of the services under the Management Agreement.

Trustees’ and Officers’ Compensation — Under the Management Agreement, MFS pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. MFS also pays compensation to Trustees or officers of the fund who are also officers of the investment adviser for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS and MFD. The fund did not pay any compensation to the independent Trustees for the period ended August 31, 2026.

Other — The adviser has voluntarily undertaken to reimburse the fund from its own resources on a quarterly basis for the cost of investment research embedded in the cost of the fund’s securities trades. This agreement may be rescinded at any time. For the period ended August 31, 2026, this reimbursement amounted to $81, which is included in “Other” income in the Statement of Operations.

At August 31, 2026, MFS held approximately 98% of the outstanding shares of the fund.

(4) Portfolio Securities

For the period ended August 31, 2026, purchases and sales of investments, other than short-term obligations and in-kind transactions, aggregated $3,947,076 and $3,397,639, respectively. Securities received and delivered in-kind through subscriptions and redemptions aggregated $26,476,653 and $463,668, respectively.

(5) Purchase and Sales of Fund Shares

The fund issues and redeems shares through MFD at net asset value (“NAV”) only with Authorized Participants and only in large blocks of shares (each, a Creation Unit). An Authorized Participant may purchase or redeem a Creation Unit each business day that the fund is open in exchange for the delivery or receipt of a designated portfolio of in-kind securities and/or cash. Authorized Participants may pay a fixed purchase or redemption transaction fee to offset the transfer and other transaction costs associated with the issuance and redemption of Creation Units. 

Individual fund shares may not be purchased or redeemed directly with the fund. Shares are listed for trading on the NYSE Arca, and individual fund shares may only be purchased and sold in the secondary market through a financial intermediary at market price. Because the fund’s shares will trade at market prices rather than NAV, shares may trade at prices greater than NAV (at a premium), at NAV, or less than NAV (at a discount). Transactions in fund shares were as follows: 

16


MFS Blended Research Small-Mid Cap ETF

Notes to Financial Statements (unaudited) - continued 

Six months ended

8/31/26 (c)

Shares

Amount

Shares sold

1,080,000

$27,090,400

Shares reacquired

(20,000

)

(512,626

)

Net change

1,060,000

$26,577,774

(c)

For the period from the commencement of the fund’s investment operations, June 4, 2026, through the stated period end.

17


ITEM 8. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Blended Research Small-Mid Cap ETF.

ITEM 9.  PROXY DISCLOSURES FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Blended Research Small-Mid Cap ETF.

ITEM 10. REMUNERATION PAID TO DIRECTORS, OFFICERS, AND OTHERS OF OPEN-END MANAGEMENT INVESTMENT COMPANIES.

This information is disclosed as part of the financial statements included in Item 7 above for MFS Blended Research Small-Mid Cap ETF. See the Statement of Operations and Note 3 within the Notes to Financial Statements for more information.

ITEM 11. STATEMENT REGARDING BASIS FOR APPROVAL OF INVESTMENT ADVISORY CONTRACT.

18


MFS Blended Research Small-Mid Cap ETF

Board Approval of Investment Management Agreement

MFS Blended Research Small-Mid Cap ETF 

The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested (“independent”) Trustees, voting separately, initially approve the Fund’s investment management agreement with MFS (the “Agreement”) and, beginning on the second anniversary of the initial effective date of the Agreement, annually approve the continuation of the Agreement. In March and April 2026, the Board met to consider the initial approval of the Agreement (“the initial review meetings”). The independent Trustees were assisted in their evaluation of the Agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS.

In connection with their deliberations regarding the initial approval of the Agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services to be performed by MFS under the Agreement and other arrangements with the Fund. The independent Trustees observed that with respect to this Fund, MFS was proposing a unitary management fee structure, pursuant to which MFS would receive a fee covering investment management and administrative services, with MFS paying the Fund’s ordinary, recurring operating expenses (the “Unitary Fee”), subject to certain exceptions.

In connection with their initial review meetings, the Trustees received and relied upon materials that included, among other items: (i) information provided by Broadridge Financial Solutions Inc. (“Broadridge”), an independent third party, on the Fund’s proposed Unitary Fee and the advisory fees and other expenses of comparable funds identified by Broadridge, as well as all other funds in the same investment classification/category (the “Broadridge expense group and universe”), (ii) information provided by MFS on the total expense ratios for Class R6 shares of MFS mutual funds in the same Morningstar category as the Fund, and (iii) the Unitary Fees for certain fully transparent actively-managed exchange-traded funds (“ETFs”) in similar Morningstar categories that MFS believes will be key competitors to the Fund. In addition, in connection with the independent Trustees’ May, June, and July 2025 meetings for the purpose of considering whether to approve the continuation of the investment advisory agreements for the MFS-advised mutual funds that the Board oversees (the “MFS Funds”), the independent Trustees received: (i) information provided by MFS on the advisory fees of portfolios of other clients of MFS, including institutional separate accounts, (ii) information regarding MFS’ financial results and financial condition, including MFS’ and certain of its affiliates’ estimated profitability from services performed for the MFS Funds as a whole, and compared to MFS’ institutional business, (iii) MFS’ views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (iv) descriptions of various functions performed by MFS for the MFS Funds, such as compliance monitoring and portfolio trading practices, and (v) information regarding the overall organization of MFS, including information about MFS’ senior management and other personnel that would provide investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative fee and expense information prepared and provided by Broadridge was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS.

The Trustees’ conclusion as to the initial approval of the Agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor. Some of the factors that figured particularly in the Trustees’ deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors. Because the Fund is newly organized and had not yet commenced investment operations at the time of the initial review meetings, the Fund had no investment performance for the Trustees to review.

The Trustees considered the proposed Unitary Fee structure to which the Fund would be subject, observing that many of the competitors of the Fund have adopted similar unitary fee structures. In assessing the reasonableness of the Fund’s proposed Unitary Fee, the Trustees considered, among other things, information on unitary fee structures generally, as well as the terms of the Agreement and descriptions of various services to be performed or procured by MFS under the Agreement, including portfolio management and portfolio trading practices and administrative services. The Trustees considered the categories of expenses which would be excluded from the Unitary Fee and therefore would be payable by the Fund. The Trustees also considered the Fund’s proposed Unitary Fee as compared with the advisory fee and total expense ratios of peer groups of funds based on information provided by Broadridge. The Trustees considered that, according to the data provided by Broadridge, the Fund's proposed Unitary Fee and proposed total expense ratio would each be lower than the applicable Broadridge expense group median.

The Trustees considered that the Agreement provides for a unitary fee level that does not include pre-established breakpoints, and considered MFS’ observation that while fee waivers, breakpoints, and expense caps are common for mutual funds, these arrangements are not typically used by ETFs.

The Trustees did not consider MFS’ costs and profits with respect to the Fund because the Fund had not yet commenced operations. The Trustees considered information prepared by MFS relating to MFS’ costs and profits with respect to the MFS Funds considered as a group, and other investment companies and institutional accounts advised by MFS, as well as MFS’ methodologies used to determine and allocate its costs to the MFS Funds and other accounts and products for purposes of estimating profitability.

19


MFS Blended Research Small-Mid Cap ETF

Board Approval of Investment Management Agreement - continued

After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the Agreement, that the Unitary Fee to be charged to the Fund represents reasonable compensation in light of the services to be provided by MFS to the Fund.

In addition, the Trustees considered MFS’ resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund. The Trustees also considered current and developing conditions in the financial services industry, including the presence of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies. In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc. The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser that also serves other investment companies as well as other accounts.

The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services to be provided to the Fund by MFS and its affiliates under agreements and plans other than the Agreement. The Trustees also considered the nature, extent and quality of certain other services MFS may perform or arrange for on the Fund’s behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS’ interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services to be provided by MFS and its affiliates on behalf of the Fund were satisfactory.

The Trustees considered so-called “fall-out benefits” to MFS such as reputational value derived from serving as investment manager to the MFS Funds. The Trustees also considered that MFS discontinued its historic practice of obtaining investment research from portfolio brokerage commissions paid by certain MFS Funds effective January 2018, and directly pays or voluntarily reimburses a Fund, if applicable, for the costs of external research acquired through the use of the Fund’s portfolio brokerage commissions.

Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including the independent Trustees, concluded that the Fund’s Agreement with MFS should be approved for an initial two-year period, commencing upon its effective date, as set forth in the Agreement.

20


MFS Blended Research Emerging Markets Equity ETF

ITEM 7.  FINANCIAL STATEMENTS AND FINANCIAL HIGHLIGHTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

MFS Blended Research Emerging Markets Equity ETF

Portfolio of Investments − 8/31/26 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

Issuer

Shares/Par

Value ($)

Common Stocks – 96.2%

Aerospace & Defense – 0.1%

Hindustan Aeronautics Ltd.

590

$29,764

Alcoholic Beverages – 0.8%

Ambev S.A., ADR

58,656

$168,343

China Resources Beer Holdings Co. Ltd.

12,558

30,952

$199,295

Apparel, Footwear, & Accessories – 0.4%

Eclat Textile Co. Ltd.

5,000

$48,704

Shenzhou International Group Holdings Ltd.

11,011

49,307

$98,011

Auto & Auto Components – 3.4%

Changzhou Xingyu Automotive Lighting Systems Co. Ltd., “A”

2,700

$31,497

Hero MotoCorp Ltd.

823

47,124

Hyundai Mobis

79

26,178

Kia Corp.

550

52,645

Mahindra & Mahindra Ltd.

8,433

290,783

Maruti Suzuki India Ltd.

1,949

277,398

PT Astra International Tbk

429,400

116,349

Yadea Group Holdings Ltd.

24,000

28,659

Yutong Bus Co. Ltd., “A”

5,500

24,382

$895,015

Brokerage & Asset Managers – 1.2%

Banco BTG Pactual S.A.

5,720

$60,395

Investec Ltd.

12,138

104,785

Korea Investment Holdings Co. Ltd.

440

61,792

XP, Inc.

3,627

66,120

Yuanta Financial Holding Co. Ltd.

16,640

34,306

$327,398

Business Services – 2.4%

Infosys Technologies Ltd., ADR

16,679

$201,149

Kanzhun Ltd., ADR

9,622

167,038

Tata Consultancy Services Ltd.

10,740

270,730

$638,917

Chemicals – 1.3%

SABIC Agri-Nutrients Co.

3,224

$112,144

Sime Darby Berhad

63,510

41,015

UPL Ltd.

33,112

195,597

$348,756

Conglomerates – 0.1%

Koc Holding A.S.

5,317

$23,676

EBEFS-SEM

1


MFS Blended Research Emerging Markets Equity ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Construction – 2.2%

Anhui Conch Cement Co. Ltd.

88,563

$191,284

CEMEX S.A.B. de C.V., ADR

17,641

189,464

Haier Smart Home Co. Ltd., “H”

6,708

18,451

Midea Group Co. Ltd., “H”

15,344

198,494

$597,693

Diversified Financial Services – 0.3%

B3 S.A. - Brasil Bolsa Balcao

21,642

$67,747

Electrical Equipment – 0.9%

Contemporary Amperex Technology Co. Ltd., “A”

3,100

$167,713

NARI Technology Co. Ltd., “A”

24,000

82,037

$249,750

Energy - Independent – 4.1%

Bharat Petroleum Corp. Ltd.

46,771

$159,235

China Petroleum & Chemical Corp.

395,880

241,666

MOL Hungarian Oil & Gas PLC (a)

10,327

166,002

Oil & Natural Gas Corp. Ltd.

22,300

54,308

PetroChina Co. Ltd.

275,892

357,956

Ultrapar Participacoes S.A.

14,696

98,757

$1,077,924

Engineering - Construction – 1.0%

Doosan Bobcat, Inc.

3,554

$161,781

Samsung E&A Co. Ltd.

2,779

95,639

$257,420

Entertainment & Leisure – 4.5%

Giant Network Group Co. Ltd., “A”

22,900

$93,545

NetEase, Inc., ADR

2,768

337,087

Tencent Holdings Ltd., ADR

13,307

761,027

$1,191,659

Food & Beverages – 2.1%

AVI Ltd.

21,569

$114,048

Inner Mongolia Yili Industrial Group Co. Ltd., “A”

50,400

198,755

NongShim Co. Ltd.

154

49,904

Orion Corp.

2,094

198,904

$561,611

Food & Drug Stores – 0.3%

Walmart de Mexico S.A.B. de C.V.

28,070

$77,737

Global Systemically Important Banks – 2.2%

China Construction Bank Corp.

489,627

$593,415

Hardware, Peripherals, & Assembly – 18.7%

Hon Hai Precision Industry Co. Ltd.

64,656

$509,552

King Slide Works Co. Ltd.

1,000

447,008

Largan Precision Co. Ltd.

1,000

241,158

Lenovo Group Ltd.

81,938

314,018

Lite-On Technology Corp.

11,000

105,763

2


MFS Blended Research Emerging Markets Equity ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Hardware, Peripherals, & Assembly – continued

Samsung Electronics Co. Ltd.

7,910

$1,502,703

SK hynix, Inc.

1,283

1,569,299

SK Square Co. Ltd.

381

288,687

$4,978,188

Insurance – 1.6%

China Pacific Insurance Co. Ltd.

48,276

$186,121

DB Insurance Co. Ltd.

312

41,285

Old Mutual Ltd.

160,102

129,642

Powszechny Zaklad Ubezpieczen S.A.

1,247

24,830

Samsung Fire & Marine Insurance Co. Ltd.

79

38,386

$420,264

Internet – 0.2%

NHN Corp.

1,030

$55,918

Machinery & Tools – 1.9%

AirTAC International Group

4,095

$183,954

Chevron Holdings Ltd.

8,944

22,501

Delta Electronics, Inc.

5,173

300,054

$506,509

Medical & Health Technology & Services – 0.1%

Bumrungrad Hospital PCL

6,600

$38,115

Metals & Mining – 3.9%

AngloGold Ashanti PLC

1,612

$181,060

Baoshan Iron & Steel Co. Ltd., “A”

159,000

137,708

Caledonia Mining Corp. PLC

1,884

47,684

Compania de Minas Buenaventura S.A.A., ADR

1,795

61,568

Industries Qatar Q.P.S.C.

69,561

190,858

Kumba Iron Ore Ltd.

8,196

121,731

National Aluminium Co. Ltd.

24,790

99,362

Vale S.A., ADR

3,784

57,101

Vedanta Aluminium Metal Ltd.

18,090

82,704

Vedanta Ltd.

18,566

54,265

$1,034,041

Network & Telecom – 1.0%

Accton Technology Corp.

4,290

$275,208

Non-Global Systemically Important Banks – 14.0%

ABSA Group Ltd.

2,133

$30,324

Akbank T.A.S.

17,622

26,236

Axis Bank Ltd.

16,354

223,365

Banco Bradesco S.A., ADR

50,419

165,374

Bank of Cyprus Holdings PLC

10,834

134,651

Canara Bank Ltd.

73,084

97,439

China Merchants Bank Co. Ltd.

29,328

190,632

China Minsheng Banking Corp. Ltd.

49,715

22,072

CIMB Group Holdings Berhad

51,700

102,218

Credicorp Ltd.

708

259,397

Emirates NBD Bank PJSC

26,173

215,772

3


MFS Blended Research Emerging Markets Equity ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Non-Global Systemically Important Banks – continued

Eurobank S.A.

34,218

$182,275

Grupo Financiero Banorte S.A. de C.V.

9,315

105,479

HDFC Bank Ltd., ADR

3,789

86,010

Huaxia Bank Co. Ltd., “A”

138,100

128,033

ICICI Bank Ltd., ADR

3,980

120,833

Itau Unibanco Holding S.A., ADR

5,524

42,038

KB Financial Group, Inc., ADR

3,316

413,804

KGI Financial Holding Co. Ltd.

173,603

185,249

National Bank of Greece S.A.

10,217

200,324

Nedbank Group Ltd.

1,533

28,036

Ping An Bank Co. Ltd., “A”

14,100

24,592

Saudi Awwal Bank

17,504

158,975

Saudi National Bank

2,329

26,859

Shinhan Financial Group Co. Ltd., ADR

3,823

302,667

Shriram Finance Ltd.

17,740

206,864

Standard Bank Group Ltd.

1,160

22,889

Turkiye Is Bankasi A.S., “C”

68,278

17,883

$3,720,290

Pharmaceuticals & Biotechnology – 2.6%

Gedeon Richter PLC

3,645

$152,188

Hugel, Inc. (a)

200

36,826

PharmaEssentia Corp.

4,931

216,845

Sun Pharmaceutical Industries Ltd.

13,678

285,225

$691,084

Real Estate – 0.4%

Emaar Development PJSC

26,920

$93,521

Retail & E-commerce – 2.5%

Alibaba Group Holding Ltd., ADR

3,941

$449,353

Mercadolibre, Inc. (a)

30

58,086

PDD Holdings, Inc., ADR (a)

1,274

107,016

Shinsegae Co. Ltd.

180

54,450

$668,905

Semiconductor & Electronic Components – 17.3%

ASE Technology Holding Co. Ltd., ADR

8,755

$323,497

Chicony Electronics Co. Ltd.

8,000

26,858

Eoptolink Technology Inc., Ltd., “A”

1,060

63,392

MediaTek, Inc.

3,352

414,747

Novatek Microelectronics Corp.

6,000

102,137

Realtek Semiconductor Corp.

1,000

22,729

Taiwan Semiconductor Manufacturing Co. Ltd., ADR

8,676

3,603,316

United Microelectronics Corp.

12,502

50,841

$4,607,517

Software – 0.2%

Totvs S.A.

5,957

$40,755

4


MFS Blended Research Emerging Markets Equity ETF

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Telecom Services – 2.1%

Advanced Info Service Public Co. Ltd.

16,236

$173,817

MTN Group Ltd.

9,023

105,897

Operadora de Sites Mexicanos, S.A.B. de C.V.

69,889

69,534

PT Telkom Indonesia (Persero) Tbk

13,170

192,019

Turkcell Iletisim Hizmetleri A.S.

8,960

17,647

$558,914

Transportation & Logistics – 0.5%

International Container Terminal Services, Inc.

10,172

$144,597

Travel, Gaming, & Lodging – 0.5%

H World Group Ltd., ADR

2,832

$134,010

Utilities – 1.4%

AXIA Energia, ADR

30,039

$305,497

CIA Saneamento Minas Gerais

1,990

21,208

Companhia de Saneamento Basico do Estado de Sao Paulo, ADR

8,654

42,058

$368,763

Total Common Stocks (Identified Cost, $22,231,327)

$25,572,387

Preferred Stocks – 2.7%

Hardware, Peripherals, & Assembly – 2.7%

Samsung Electronics Co. Ltd. (Identified Cost, $434,193)

5,181

$706,018

Mutual Funds – 1.0%

Money Market Funds – 1.0%

State Street Institutional U.S. Government Money Market Fund - Premier Class, 3.62% (j) (Identified Cost, $277,097)

277,097

$277,097

Other Assets, Less Liabilities – 0.1%

24,179

Net Assets – 100.0%

$26,579,681

(a)

Non-income producing security.

(j)

The rate quoted is the annualized seven-day yield of the fund at period end.

The following abbreviations are used in this report and are defined:

ADR

American Depositary Receipt

See Notes to Financial Statements

5


MFS Blended Research Emerging Markets Equity ETF

Financial Statements | Statement of Assets and Liabilities

This statement represents your fund’s balance sheet, which details the assets and liabilities comprising the total value of the fund. 

At 8/31/26 (unaudited)

Assets

Investments in unaffiliated issuers, at value (identified cost, $22,942,617)

$26,555,502

Foreign currency, at value (identified cost, $7,566)

7,571

Receivables for

Interest and dividends

24,779

Total assets

$26,587,852

Liabilities

Payable to affiliates

Investment adviser

$1,288

Deferred foreign capital gains tax expense payable

6,883

Total liabilities

$8,171

Net assets

$26,579,681

Net assets consist of

Paid-in capital

$22,832,111

Total distributable earnings (loss)

3,747,570

Net assets

$26,579,681

Shares of beneficial interest outstanding (unlimited number of shares authorized)

975,000

Net asset value per share (net assets of $26,579,681 / 975,000 shares of beneficial interest outstanding)

$27.26

See Notes to Financial Statements

6


MFS Blended Research Emerging Markets Equity ETF

Financial Statements | Statement of Operations

This statement describes how much your fund earned in investment income and accrued in expenses. It also describes any gains and/or losses generated by fund operations. 

Six months ended 8/31/26 (c) (unaudited)

Net investment income (loss)

Income

Dividends from unaffiliated issuers

$381,443

Other

3,600

Income on securities loaned

37

Foreign taxes withheld

(46,579

)

Total investment income

$338,501

Expenses

Management fee

$51,235

Miscellaneous

20

Total expenses

$51,255

Net investment income (loss)

$287,246

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers (includes $842 foreign capital gains tax)

$(199,430

)

Foreign currency

(30,355

)

In-kind redemptions – unaffiliated issuers

84,116

Net realized gain (loss)

$(145,669

)

Change in unrealized appreciation or depreciation

Unaffiliated issuers (includes $6,883 increase in deferred foreign capital gains tax)

$3,606,002

Translation of assets and liabilities in foreign currencies

(9

)

Net unrealized gain (loss)

$3,605,993

Net realized and unrealized gain (loss)

$3,460,324

Change in net assets from operations

$3,747,570

(c) For the period from the commencement of the fund’s investment operations, March 5, 2026, through the stated period end.

See Notes to Financial Statements

7


MFS Blended Research Emerging Markets Equity ETF

Financial Statements |  Statement of Changes in Net Assets

This statement describes the increases and/or decreases in net assets resulting from operations, any distributions, and any shareholder transactions. 

Six months ended


8/31/26(c)

(unaudited)

Change in net assets

From operations

Net investment income (loss)

$287,246

Net realized gain (loss)

(145,669

)

Net unrealized gain (loss)

3,605,993

Change in net assets from operations

$3,747,570

Change in net assets from fund share transactions

$22,778,648

Miscellaneous capital

$53,463

Total change in net assets

$26,579,681

Net assets

At beginning of period

—

At end of period

$26,579,681

(c)

For the period from the commencement of the fund’s investment operations, March 5, 2026, through the stated period end.

See Notes to Financial Statements

8


MFS Blended Research Emerging Markets Equity ETF

Financial Statements | Financial Highlights

The financial highlights table is intended to help you understand the fund's financial performance for the semiannual period and the past 5 fiscal years (or life of the fund, if shorter). Certain information reflects financial results for a single fund share. The total returns in the table represent the rate that an investor would have earned (or lost) on an investment in the fund (assuming reinvestment of all distributions) held for the entire period. 

Six months

ended

8/31/26 (c)

(unaudited)

Net asset value, beginning of period

$23.19

Income (loss) from investment operations

Net investment income (loss) (d)

$0.31

Net realized and unrealized gain (loss)

3.70

Total from investment operations

$4.01

Miscellaneous capital (d)

$0.06

Net asset value, end of period (x)

$27.26

Total return (%) (s)(x)

17.55

(n)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses

0.44

(a)

Net investment income (loss)

2.47

(a)

Portfolio turnover rate (e)

14

(n)

Net assets at end of period (000 omitted)

$26,580

(a)

Annualized.

(c)

For the period from the commencement of the fund’s investment operations, March 5, 2026, through the stated period end.

(d)

Per share data is based on average shares outstanding.

(e)

Portfolio turnover rate excludes securities received or delivered in-kind in the process of creating or redeeming fund shares.

(n)

Not annualized.

(s)

From time to time the fund may receive proceeds from litigation settlements, without which performance would be lower.

(x)

The net asset value and total return have been calculated on net assets which include adjustments made in accordance with U.S. generally accepted

accounting principles required at period end for financial reporting purposes.

See Notes to Financial Statements

9


MFS Blended Research Emerging Markets Equity ETF

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS Blended Research Emerging Markets Equity ETF (the fund) is a diversified series of MFS Active Exchange Traded Funds Trust (the trust). The trust is organized as a Massachusetts business trust and is registered under the Investment Company Act of 1940, as amended, as an open-end management investment company.

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

(2) Significant Accounting Policies

General — The preparation of financial statements in conformity with U.S. generally accepted accounting principles requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results could differ from those estimates. In the preparation of these financial statements, management has evaluated subsequent events occurring after the date of the fund’s Statement of Assets and Liabilities through the date that the financial statements were issued. The fund invests in foreign securities, including securities of emerging market issuers. Investments in foreign securities are vulnerable to the effects of changes in the relative values of the local currency and the U.S. dollar and to the effects of changes in each country’s market, economic, industrial, political, regulatory, geopolitical, environmental, public health, and other conditions. Investments tied economically to emerging markets, especially frontier markets, can involve additional and greater risks than the risks associated with investments in developed markets.  Emerging markets can have less developed markets, greater custody and operational risk, less developed legal, regulatory, and accounting systems, greater government involvement in the economy, greater risk of new or inconsistent government treatment of or restrictions on issuers and instruments, and greater political, social, geopolitical, and economic instability than developed markets.

Segment Reporting — An operating segment is defined in FASB Accounting Standards Codification Topic 280, Segment Reporting as a component of a public entity that engages in business activities from which it may recognize revenues and incur expenses, has operating results that are regularly reviewed by the entity’s chief operating decision maker (CODM) in making resource allocation decisions and assessing segment performance, and for which discrete financial information is available. The fund represents a single operating segment and the Chairman’s Committee of the fund's adviser acts as the segment’s CODM. The fund’s total returns, expense ratios, and changes in net assets which are used by the CODM to assess segment performance and to make resource allocation decisions to the segment are consistent with that presented within the fund’s financial statements.

Balance Sheet Offsetting — The fund's accounting policy with respect to balance sheet offsetting is that, absent an event of default by the counterparty or a termination of the agreement, the International Swaps and Derivatives Association (ISDA) Master Agreement, or similar agreement, does not result in an offset of reported amounts of financial assets and financial liabilities in the Statement of Assets and Liabilities across transactions between the fund and the applicable counterparty. The fund's right to setoff may be restricted or prohibited by the bankruptcy or insolvency laws of the particular jurisdiction to which a specific master netting agreement counterparty is subject. Balance sheet offsetting disclosures, to the extent applicable to the fund, have been included in the fund’s Significant Accounting Policies note under the captions for each of the fund’s in-scope financial instruments and transactions.

Investment Valuations — Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund’s investments to MFS as the fund's adviser, pursuant to the fund’s valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the “valuation designee” of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser’s fair valuation policy and procedures.

Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which approximates market value. Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

10


MFS Blended Research Emerging Markets Equity ETF

Notes to Financial Statements (unaudited) - continued 

Under the fund’s valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser’s fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. An investment may also be valued at fair value if the adviser determines that the investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund’s net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund’s net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund’s net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net asset value per share.

Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk). Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. The following is a summary of the levels used as of August 31, 2026 in valuing the fund's assets and liabilities:

Financial Instruments

Level 1

Level 2

Level 3

Total

Equity Securities:

Taiwan

$7,091,926

$—

$—

$7,091,926

South Korea

5,656,886

—

—

5,656,886

China

5,352,713

—

—

5,352,713

India

2,782,155

—

—

2,782,155

Brazil

1,135,393

—

—

1,135,393

South Africa

886,096

—

—

886,096

Mexico

442,214

—

—

442,214

Greece

382,599

—

—

382,599

Peru

320,965

—

—

320,965

Other Countries

2,015,526

211,932

—

2,227,458

Investment Companies

277,097

—

—

277,097

Total

$26,343,570

$211,932

$—

$26,555,502

For further information regarding security characteristics, see the Portfolio of Investments.

Foreign Currency Translation — Purchases and sales of foreign investments, income, and expenses are converted into U.S. dollars based upon currency exchange rates prevailing on the respective dates of such transactions or on the reporting date for foreign denominated receivables and payables. Gains and losses attributable to foreign currency exchange rates on sales of securities are recorded for financial statement purposes as net realized gains and losses on investments. Gains and losses attributable to foreign exchange rate movements on receivables, payables, income and expenses are recorded for financial statement purposes as foreign currency transaction gains and losses. That portion of both realized and unrealized gains and losses on investments that results from fluctuations in foreign currency exchange rates is not separately disclosed.

Security Loans — Under its Securities Lending Agency Agreement with the fund, Goldman Sachs Agency Lending, as lending agent, loans the securities of the fund to certain qualified institutions (the “Borrowers”) approved by the fund. Security loans can be terminated at the discretion of either the lending agent or the fund and the related securities must be returned within the earlier of the standard trade settlement period for such securities or within five business days. The loans are collateralized by cash and/or U.S. government securities in an amount typically at least equal to the market value of the securities loaned. On loans collateralized by cash, the cash collateral is invested in a money market fund. The market value of the loaned securities is determined at the close of business of the fund and any additional required collateral is delivered to the fund on the next business day. The lending agent

11


MFS Blended Research Emerging Markets Equity ETF

Notes to Financial Statements (unaudited) - continued 

provides the fund with indemnification against Borrower default. In the event of Borrower default, the lending agent will, for the benefit of the fund, either purchase securities identical to those loaned or pay the fund the market value of the loaned securities. In return, the lending agent assumes the fund's rights to the related collateral. If the collateral value is less than the cost to purchase identical securities or the cash needed to pay their market value, the lending agent is responsible for the shortfall, but only to the extent that such shortfall is not due to a decline in collateral value resulting from collateral reinvestment for which the fund bears the risk of loss. A portion of the income generated upon investment of the collateral is remitted to the Borrowers, and the remainder is allocated between the fund and the lending agent. On loans collateralized by U.S. government securities, a fee is received from the Borrower, and is allocated between the fund and the lending agent. Income from securities lending is separately reported in the Statement of Operations. The dividend and interest income earned on the securities loaned is accounted for in the same manner as other dividend and interest income. At August 31, 2026, there were no securities on loan or collateral outstanding.

Indemnifications — Under the fund's organizational documents, its officers and Trustees may be indemnified against certain liabilities and expenses arising out of the performance of their duties to the fund. Additionally, in the normal course of business, the fund enters into agreements with service providers that may contain indemnification clauses. The fund's maximum exposure under these agreements is unknown as this would involve future claims that may be made against the fund that have not yet occurred.

Investment Transactions and Income —  Interest income is recorded on the accrual basis. Dividends received in cash are recorded on the ex-dividend date. Certain dividends from foreign securities will be recorded when the fund is informed of the dividend if such information is obtained subsequent to the ex-dividend date. Dividend payments received in additional securities are recorded on the ex-dividend date in an amount equal to the value of the security on such date.

The fund may receive proceeds from litigation settlements. Any proceeds received from litigation involving portfolio holdings are reflected in the Statement of Operations in realized gain/loss if the security has been disposed of by the fund or in unrealized gain/loss if the security is still held by the fund. Any other proceeds from litigation not related to portfolio holdings are reflected as other income in the Statement of Operations.

Investment transactions are recorded on the trade date.  In determining the net gain or loss on securities sold, the cost of securities is determined on the identified cost basis.

Tax Matters and Distributions — The fund intends to qualify as a regulated investment company, as defined under Subchapter M of the Internal Revenue Code, and to distribute all of its taxable income, including realized capital gains. As a result, no provision for federal income tax is required. The fund’s federal tax returns, when filed, will remain subject to examination by the Internal Revenue Service for generally a three-year period. Management has analyzed the fund’s tax positions taken on federal and state tax returns for all open tax years and does not believe that there are any uncertain tax positions that require recognition of a tax liability. Foreign taxes, if any, have been accrued by the fund in the accompanying financial statements in accordance with the applicable foreign tax law. Foreign income taxes may be withheld by certain countries in which the fund invests. Additionally, capital gains realized by the fund on securities issued in or by certain foreign countries may be subject to capital gains tax imposed by those countries.

Distributions to shareholders are recorded on the ex-dividend date. Income and capital gain distributions are determined in accordance with income tax regulations, which may differ from U.S. generally accepted accounting principles. Certain capital accounts in the financial statements are periodically adjusted for permanent differences in order to reflect their tax character. These adjustments have no impact on net assets or net asset value per share. Temporary differences which arise from recognizing certain items of income, expense, gain or loss in different periods for financial statement and tax purposes will reverse at some time in the future.

The federal tax cost and the tax basis components of distributable earnings were as follows: 

As of 8/31/26

Cost of investments

$22,942,615

Gross appreciation

4,577,550

Gross depreciation

(964,663

)

Net unrealized appreciation (depreciation)

$3,612,887

(3) Transactions with Affiliates

Investment Adviser — The fund has an Investment Management Agreement (“Management Agreement”) with MFS to provide overall investment management and related administrative services and facilities to the fund. The management fee is computed daily and paid monthly at an annual rate of 0.44% of the fund’s average daily net assets. Under the Management Agreement, MFS will pay substantially all the fund’s operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), investment-related expenses

12


MFS Blended Research Emerging Markets Equity ETF

Notes to Financial Statements (unaudited) - continued 

(such as fees and expenses associated with investments in investment companies and other similar investment vehicles), litigation expenses, the cost of proxy solicitations and shareholder meetings, the fee paid to MFS pursuant to this agreement, and such other expenses as approved by a majority of the fund’s Board of Trustees.

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly owned subsidiary of MFS, is the distributor of shares of the fund. The fund has adopted a plan in accordance with Rule 12b-1 under the Investment Company Act of 1940, as amended (the Distribution Plan). The fund’s Board of Trustees has determined not to implement payments of Rule 12b-1 fees under the Distribution Plan at this time. The fund does not currently pay compensation to MFD for any distribution services provided.

Administrator — MFS provides certain financial, legal, and other administrative services to the fund. MFS bears the costs of the services under the Management Agreement.

Trustees’ and Officers’ Compensation — Under the Management Agreement, MFS pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. MFS also pays compensation to Trustees or officers of the fund who are also officers of the investment adviser for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS and MFD. The fund did not pay any compensation to the independent Trustees for the six months ended August 31, 2026.

Other — At August 31, 2026, MFS held approximately 87% of the outstanding shares of the fund.

The adviser has voluntarily undertaken to reimburse the fund from its own resources on a quarterly basis for the cost of investment research embedded in the cost of the fund’s securities trades. This agreement may be rescinded at any time. For the six months ended August 31, 2026, this reimbursement amounted to $3,600, which is included in “Other” income in the Statement of Operations.

(4) Portfolio Securities

For the six months ended August 31, 2026, purchases and sales of investments, other than short-term obligations and in-kind transactions, aggregated $15,602,769 and $3,298,871, respectively. Securities received and delivered in-kind through subscriptions and redemptions aggregated $10,616,493 and $140,869, respectively. 

(5) Purchase and Sales of Fund Shares

The fund issues and redeems shares through MFD at net asset value (“NAV”) only with Authorized Participants and only in large blocks of shares (each, a Creation Unit). An Authorized Participant may purchase or redeem a Creation Unit each business day that the fund is open in exchange for the delivery or receipt of a designated portfolio of in-kind securities and/or cash. Authorized Participants may pay a fixed purchase or redemption transaction fee to offset the transfer and other transaction costs associated with the issuance and redemption of Creation Units.  An additional variable fee may be charged for certain transactions. These variable fees are included in “Miscellaneous capital” in the Statement of Changes in Net Assets.

Individual fund shares may not be purchased or redeemed directly with the fund. Shares are listed for trading on the NYSE Arca, and individual fund shares may only be purchased and sold in the secondary market through a financial intermediary at market price. Because the fund’s shares will trade at market prices rather than NAV, shares may trade at prices greater than NAV (at a premium), at NAV, or less than NAV (at a discount). Transactions in fund shares were as follows: 

Six months ended

8/31/26 (c)

Shares

Amount

Shares sold

1,000,000

$23,429,829

Shares reacquired

(25,000

)

(651,181

)

Net change

975,000

$22,778,648

(c)

For the period from the commencement of the fund’s investment operations, March 5, 2026, through the stated period end.

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ITEM 8. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Blended Research Emerging Markets Equity ETF.

ITEM 9.  PROXY DISCLOSURES FOR OPEN-END MANAGEMENT INVESTMENT COMPANIES.

There is nothing to report for this item for MFS Blended Research Emerging Markets Equity ETF.

ITEM 10. REMUNERATION PAID TO DIRECTORS, OFFICERS, AND OTHERS OF OPEN-END MANAGEMENT INVESTMENT COMPANIES.

This information is disclosed as part of the financial statements included in Item 7 above for MFS Blended Research Emerging Markets Equity ETF. See the Statement of Operations and Note 3 within the Notes to Financial Statements for more information.

ITEM 11. STATEMENT REGARDING BASIS FOR APPROVAL OF INVESTMENT ADVISORY CONTRACT.

14


MFS Blended Research Emerging Markets Equity ETF

Board Approval of Investment Management Agreement

MFS Blended Research Emerging Markets Equity ETF

The Investment Company Act of 1940 requires that both the full Board of Trustees and a majority of the non-interested (“independent”) Trustees, voting separately, initially approve the Fund’s investment management agreement with MFS (the “Agreement”) and, beginning on the second anniversary of the initial effective date of the Agreement, annually approve the continuation of the Agreement. In July and September 2025, the Board met to consider the initial approval of the Agreement (“the initial review meetings”). The independent Trustees were assisted in their evaluation of the Agreement by independent legal counsel, from whom they received separate legal advice and with whom they met separately from MFS.

In connection with their deliberations regarding the initial approval of the Agreement, the Trustees, including the independent Trustees, considered such information and factors as they believed, in light of the legal advice furnished to them and their own business judgment, to be relevant. As described below, the Trustees considered the nature, quality, and extent of the various investment advisory, administrative, and shareholder services to be performed by MFS under the Agreement and other arrangements with the Fund. The independent Trustees observed that with respect to this Fund, MFS was proposing a unitary management fee structure, pursuant to which MFS would receive a fee covering investment management and administrative services, with MFS paying the Fund’s ordinary, recurring operating expenses (the “Unitary Fee”), subject to certain exceptions.

In connection with their initial review meetings, the Trustees received and relied upon materials that included, among other items: (i) information provided by Broadridge Financial Solutions Inc. (“Broadridge”), an independent third party, on the Fund’s proposed Unitary Fee and the advisory fees and other expenses of comparable funds identified by Broadridge, as well as all other funds in the same investment classification/category (the “Broadridge expense group and universe”), (ii) information provided by MFS on the total expense ratios for Class R6 shares of MFS mutual funds in the same Morningstar category as the Fund, and (iii) the Unitary Fees for certain fully transparent actively-managed exchange-traded funds (“ETFs”) in similar Morningstar categories that MFS believes will be key competitors to the Fund. In addition, in connection with the independent Trustees’ May, June, and July 2025 meetings for the purpose of considering whether to approve the continuation of the investment advisory agreements for the MFS-advised mutual funds that the Board oversees (the “MFS Funds”), the independent Trustees received: (i) information provided by MFS on the advisory fees of portfolios of other clients of MFS, including institutional separate accounts and other clients, (ii) information regarding MFS’ financial results and financial condition, including MFS’ and certain of its affiliates’ estimated profitability from services performed for the MFS Funds as a whole, and compared to MFS’ institutional business, (iii) MFS’ views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (iv) descriptions of various functions performed by MFS for the MFS Funds, such as compliance monitoring and portfolio trading practices, and (v) information regarding the overall organization of MFS, including information about MFS’ senior management and other personnel that would provide investment advisory, administrative and other services to the Fund and the other MFS Funds. The comparative fee and expense information prepared and provided by Broadridge was not independently verified and the independent Trustees did not independently verify any information provided to them by MFS.

The Trustees’ conclusion as to the initial approval of the Agreement was based on a comprehensive consideration of all information provided to the Trustees and not the result of any single factor. Some of the factors that figured particularly in the Trustees’ deliberations are described below, although individual Trustees may have evaluated the information presented differently from one another, giving different weights to various factors. Because the Fund is newly organized and had not yet commenced investment operations at the time of the initial review meetings, the Fund had no investment performance for the Trustees to review.

The Trustees considered the proposed Unitary Fee structure to which the Fund would be subject, observing that many of the competitors of the Fund have adopted similar unitary fee structures. In assessing the reasonableness of the Fund’s proposed Unitary Fee, the Trustees considered, among other things, information on unitary fee structures generally, as well as the terms of the Agreement and descriptions of various services to be performed or procured by MFS under the Agreement, including portfolio management and portfolio trading practices and administrative services. The Trustees considered the categories of expenses which would be excluded from the Unitary Fee and therefore would be payable by the Fund. The Trustees also considered the Fund’s proposed Unitary Fee as compared with the advisory fee and total expense ratios of peer groups of funds based on information provided by Broadridge. The Trustees considered that, according to the data provided by Broadridge, the Fund's proposed Unitary Fee would be approximately at the applicable Broadridge expense group median and the Fund’s proposed total expense ratio would be lower than the applicable Broadridge expense group median.

The Trustees considered that the Agreement provides for a unitary fee level that does not include pre-established breakpoints, and considered MFS’ observation that while fee waivers, breakpoints, and expense caps are common for mutual funds, these arrangements are not typically used by ETFs.

The Trustees did not consider MFS’ costs and profits with respect to the Fund because the Fund had not yet commenced operations. The Trustees considered information prepared by MFS relating to MFS’ costs and profits with respect to the MFS Funds considered as a group, and other investment companies and institutional accounts advised by MFS, as well as MFS’ methodologies used to determine and allocate its costs to the MFS Funds and other accounts and products for purposes of estimating profitability.

15


MFS Blended Research Emerging Markets Equity ETF

Board Approval of Investment Management Agreement - continued

After reviewing these and other factors described herein, the Trustees concluded, within the context of their overall conclusions regarding the Agreement, that the Unitary Fee to be charged to the Fund represents reasonable compensation in light of the services to be provided by MFS to the Fund.

In addition, the Trustees considered MFS’ resources and related efforts to continue to retain, attract and motivate capable personnel to serve the Fund. The Trustees also considered current and developing conditions in the financial services industry, including the presence of large and well-capitalized companies which are spending, and appear to be prepared to continue to spend, substantial sums to engage personnel and to provide services to competing investment companies. In this regard, the Trustees also considered the financial resources of MFS and its ultimate parent, Sun Life Financial Inc. The Trustees also considered the advantages and possible disadvantages to the Fund of having an adviser that also serves other investment companies as well as other accounts.

The Trustees also considered the nature, quality, cost, and extent of administrative, transfer agency, and distribution services to be provided to the Fund by MFS and its affiliates under agreements and plans other than the Agreement. The Trustees also considered the nature, extent and quality of certain other services MFS may perform or arrange for on the Fund’s behalf, which may include securities lending programs, directed expense payment programs, class action recovery programs, and MFS’ interaction with third-party service providers, principally custodians and sub-custodians. The Trustees concluded that the various non-advisory services to be provided by MFS and its affiliates on behalf of the Fund were satisfactory.

The Trustees considered so-called “fall-out benefits” to MFS such as reputational value derived from serving as investment manager to the MFS Funds. The Trustees also considered that MFS discontinued its historic practice of obtaining investment research from portfolio brokerage commissions paid by certain MFS Funds effective January 2018, and directly pays or voluntarily reimburses a Fund, if applicable, for the costs of external research acquired through the use of the Fund’s portfolio brokerage commissions.

Based on their evaluation of factors that they deemed to be material, including those factors described above, the Board of Trustees, including the independent Trustees, concluded that the Fund’s Agreement with MFS should be approved for an initial two-year period, commencing upon its effective date, as set forth in the Agreement.

16


ITEM 12.  DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Not applicable to the Registrant.

ITEM 13. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES. 

Not applicable to the Registrant.

ITEM 14. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS.

Not applicable to the Registrant.

ITEM 15. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

There were no material changes to the procedures by which shareholders may send recommendations to the Board for nominees to the Registrant’s Board 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 this Item.

ITEM 16.  CONTROLS AND PROCEDURES.

  • Based upon their evaluation of the effectiveness of the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940 (the “Act”)) as conducted within 90 days of the filing date of this report on Form N-CSR, the Registrant’s principal financial officer and principal executive officer have concluded that those disclosure controls and procedures provide reasonable assurance that the material information required to be disclosed by the Registrant on this report is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms.

  • There were no changes in the Registrant’s internal controls over financial reporting (as defined in Rule 30a-3(d) under the Act) that occurred during the period covered by the report that have materially affected, or are 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 to the Registrant.

ITEM 18. RECOVERY OF ERRONEOUSLY AWARDED COMPENSATION.

Not applicable to the Registrant.

ITEM 19.  EXHIBITS.

  • Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit:  Not applicable.

  • Any policy required by the listing standards adopted pursuant to Rule 10D-1 under the Exchange Act (17 CFR 240.10D-1) by the registered national securities exchange or registered national securities association upon which the registrant’s securities are listed. Not applicable.

  • A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the Act (17 CFR 270.30a-2):  Attached hereto as EX-99.302CERT.

  • Any written solicitation to purchase securities under Rule 23c-1 under the Act (17 CFR 270.23c-1) sent or given during the period covered by the report by or on behalf of the registrant to 10 or more persons.  Not applicable.

  • Change in the registrant's independent public accountant.  Not applicable.

  • If the report is filed under Section 13(a) or 15(d) of the Exchange Act, provide the certifications required by Rule 30a-2(b) under the Act (17 CFR 270.30a-2(b)), Rule 13a-14(b) or Rule 15d-14(b) under the Exchange Act (17 CFR 240.13a-14(b) or 240.15d-14(b)) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350) as an exhibit.  A certification furnished pursuant to this paragraph will not be deemed “filed” for the purposes of Section 18 of the Exchange Act (15 U.S.C. 78r), or otherwise subject to the liability of that section.  Such certification will not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Exchange Act, except to the extent that the registrant specifically incorporates it by reference. Attached hereto as EX-99.906CERT.

Notice

A copy of the Amended and Restated Declaration of Trust, as amended, of the Registrant is on file with the Secretary of State of The Commonwealth of Massachusetts and notice is hereby given that this instrument is executed on behalf of the Registrant by an officer of the Registrant as an officer and not individually and the obligations of or arising out of this instrument are not binding upon any of the Trustees or shareholders individually, but are binding only upon the assets and property of the respective constituent series of the Registrant.

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.

(Registrant)  MFS ACTIVE EXCHANGE TRADED FUNDS TRUST                                                          

By (Signature and Title)*

/S/ DAVID L. DILORENZO

David L. DiLorenzo, President

Date:   October 16, 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 (Signature and Title)*

/S/ DAVID L. DILORENZO

David L. DiLorenzo, President (Principal Executive Officer)

Date:  October 16, 2026

By (Signature and Title)*

/S/ KASEY L. PHILLIPS                                           

Kasey L. Phillips, Treasurer (Principal Financial Officer and Accounting Officer)

Date:  October 16, 2026

*  Print name and title of each signing officer under his or her signature.

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