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MFS SERIES TRUST XIII (0000356349) (Filer)

SEC · EDGAR 财务披露 · October 28, 2026 at 8:57 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

811-03327

MFS SERIES TRUST XIII

(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 Diversified Income Fund, MFS Government Securities Fund and MFS New Discovery Value Fund. The remaining series of the Registrant has a fiscal year end other than February 28.

ITEM 1.  REPORTS TO STOCKHOLDERS.

Item 1(a):

MFSLOGO_RED.EPS

MFS® Diversified
Income Fund

TSR_Ribbon_red

Class A-DIFAX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Diversified Income Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment (annualized) ~
A $45 0.89%

˜ Expenses are direct expenses and do not include underlying fund fees and expenses.

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,771,014,850 Portfolio Turnover Rate (%): 22
Total Number of Holdings: 1,376

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 ~ 61.4%
Equities 37.0%
Money Market Funds 1.5%
Purchased Options 0.1%

Equity sectors

Real Estate 12.5%
Health Care 4.9%
Financials 4.2%
Consumer Staples 3.6%
Energy 2.9%
Industrials 2.4%
Consumer Discretionary 1.9%
Information Technology 1.6%
Utilities 1.4%
Communication Services 1.0%
Materials 0.5%
Convertible Debt 0.1%

Composition including fixed income credit quality

AAA 1.2%
AA 0.9%
A 6.2%
BBB 12.2%
BB 16.2%
B 10.9%
CCC 3.0%
CC 0.0%
C 0.2%
D 0.2%
U.S. Government 3.8%
Federal Agencies 5.9%
Not Rated 0.7%
Non-Fixed Income 37.1%
Money Market Funds 1.5%

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.

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.

~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.

The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

DIFA-SEM

MFSLOGO_RED.EPS

MFS® Diversified
Income Fund

TSR_Ribbon_red

Class C-DIFCX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Diversified Income Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment (annualized) ~
C $83 1.64%

˜ Expenses are direct expenses and do not include underlying fund fees and expenses.

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,771,014,850 Portfolio Turnover Rate (%): 22
Total Number of Holdings: 1,376

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 ~ 61.4%
Equities 37.0%
Money Market Funds 1.5%
Purchased Options 0.1%

Equity sectors

Real Estate 12.5%
Health Care 4.9%
Financials 4.2%
Consumer Staples 3.6%
Energy 2.9%
Industrials 2.4%
Consumer Discretionary 1.9%
Information Technology 1.6%
Utilities 1.4%
Communication Services 1.0%
Materials 0.5%
Convertible Debt 0.1%

Composition including fixed income credit quality

AAA 1.2%
AA 0.9%
A 6.2%
BBB 12.2%
BB 16.2%
B 10.9%
CCC 3.0%
CC 0.0%
C 0.2%
D 0.2%
U.S. Government 3.8%
Federal Agencies 5.9%
Not Rated 0.7%
Non-Fixed Income 37.1%
Money Market Funds 1.5%

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.

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.

~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.

The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

DIFC-SEM

MFSLOGO_RED.EPS

MFS® Diversified
Income Fund

TSR_Ribbon_red

Class I-DIFIX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Diversified Income Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment (annualized) ~
I $33 0.64%

˜ Expenses are direct expenses and do not include underlying fund fees and expenses.

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,771,014,850 Portfolio Turnover Rate (%): 22
Total Number of Holdings: 1,376

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 ~ 61.4%
Equities 37.0%
Money Market Funds 1.5%
Purchased Options 0.1%

Equity sectors

Real Estate 12.5%
Health Care 4.9%
Financials 4.2%
Consumer Staples 3.6%
Energy 2.9%
Industrials 2.4%
Consumer Discretionary 1.9%
Information Technology 1.6%
Utilities 1.4%
Communication Services 1.0%
Materials 0.5%
Convertible Debt 0.1%

Composition including fixed income credit quality

AAA 1.2%
AA 0.9%
A 6.2%
BBB 12.2%
BB 16.2%
B 10.9%
CCC 3.0%
CC 0.0%
C 0.2%
D 0.2%
U.S. Government 3.8%
Federal Agencies 5.9%
Not Rated 0.7%
Non-Fixed Income 37.1%
Money Market Funds 1.5%

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.

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.

~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.

The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

DIFI-SEM

MFSLOGO_RED.EPS

MFS® Diversified
Income Fund

TSR_Ribbon_red

Class R1-DIFDX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Diversified Income Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment (annualized) ~
R1 $83 1.64%

˜ Expenses are direct expenses and do not include underlying fund fees and expenses.

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,771,014,850 Portfolio Turnover Rate (%): 22
Total Number of Holdings: 1,376

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 ~ 61.4%
Equities 37.0%
Money Market Funds 1.5%
Purchased Options 0.1%

Equity sectors

Real Estate 12.5%
Health Care 4.9%
Financials 4.2%
Consumer Staples 3.6%
Energy 2.9%
Industrials 2.4%
Consumer Discretionary 1.9%
Information Technology 1.6%
Utilities 1.4%
Communication Services 1.0%
Materials 0.5%
Convertible Debt 0.1%

Composition including fixed income credit quality

AAA 1.2%
AA 0.9%
A 6.2%
BBB 12.2%
BB 16.2%
B 10.9%
CCC 3.0%
CC 0.0%
C 0.2%
D 0.2%
U.S. Government 3.8%
Federal Agencies 5.9%
Not Rated 0.7%
Non-Fixed Income 37.1%
Money Market Funds 1.5%

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.

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.

~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.

The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

DIFR1-SEM

MFSLOGO_RED.EPS

MFS® Diversified
Income Fund

TSR_Ribbon_red

Class R2-DIFEX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Diversified Income Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment (annualized) ~
R2 $58 1.14%

˜ Expenses are direct expenses and do not include underlying fund fees and expenses.

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,771,014,850 Portfolio Turnover Rate (%): 22
Total Number of Holdings: 1,376

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 ~ 61.4%
Equities 37.0%
Money Market Funds 1.5%
Purchased Options 0.1%

Equity sectors

Real Estate 12.5%
Health Care 4.9%
Financials 4.2%
Consumer Staples 3.6%
Energy 2.9%
Industrials 2.4%
Consumer Discretionary 1.9%
Information Technology 1.6%
Utilities 1.4%
Communication Services 1.0%
Materials 0.5%
Convertible Debt 0.1%

Composition including fixed income credit quality

AAA 1.2%
AA 0.9%
A 6.2%
BBB 12.2%
BB 16.2%
B 10.9%
CCC 3.0%
CC 0.0%
C 0.2%
D 0.2%
U.S. Government 3.8%
Federal Agencies 5.9%
Not Rated 0.7%
Non-Fixed Income 37.1%
Money Market Funds 1.5%

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.

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.

~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.

The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

DIFR2-SEM

MFSLOGO_RED.EPS

MFS® Diversified
Income Fund

TSR_Ribbon_red

Class R3-DIFFX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Diversified Income Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment (annualized) ~
R3 $45 0.89%

˜ Expenses are direct expenses and do not include underlying fund fees and expenses.

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,771,014,850 Portfolio Turnover Rate (%): 22
Total Number of Holdings: 1,376

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 ~ 61.4%
Equities 37.0%
Money Market Funds 1.5%
Purchased Options 0.1%

Equity sectors

Real Estate 12.5%
Health Care 4.9%
Financials 4.2%
Consumer Staples 3.6%
Energy 2.9%
Industrials 2.4%
Consumer Discretionary 1.9%
Information Technology 1.6%
Utilities 1.4%
Communication Services 1.0%
Materials 0.5%
Convertible Debt 0.1%

Composition including fixed income credit quality

AAA 1.2%
AA 0.9%
A 6.2%
BBB 12.2%
BB 16.2%
B 10.9%
CCC 3.0%
CC 0.0%
C 0.2%
D 0.2%
U.S. Government 3.8%
Federal Agencies 5.9%
Not Rated 0.7%
Non-Fixed Income 37.1%
Money Market Funds 1.5%

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.

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.

~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.

The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

DIFR3-SEM

MFSLOGO_RED.EPS

MFS® Diversified
Income Fund

TSR_Ribbon_red

Class R4-DIFGX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Diversified Income Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment (annualized) ~
R4 $33 0.64%

˜ Expenses are direct expenses and do not include underlying fund fees and expenses.

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,771,014,850 Portfolio Turnover Rate (%): 22
Total Number of Holdings: 1,376

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 ~ 61.4%
Equities 37.0%
Money Market Funds 1.5%
Purchased Options 0.1%

Equity sectors

Real Estate 12.5%
Health Care 4.9%
Financials 4.2%
Consumer Staples 3.6%
Energy 2.9%
Industrials 2.4%
Consumer Discretionary 1.9%
Information Technology 1.6%
Utilities 1.4%
Communication Services 1.0%
Materials 0.5%
Convertible Debt 0.1%

Composition including fixed income credit
quality

AAA 1.2%
AA 0.9%
A 6.2%
BBB 12.2%
BB 16.2%
B 10.9%
CCC 3.0%
CC 0.0%
C 0.2%
D 0.2%
U.S. Government 3.8%
Federal Agencies 5.9%
Not Rated 0.7%
Non-Fixed Income 37.1%
Money Market Funds 1.5%

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.

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.

~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.

The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

DIFR4-SEM

MFSLOGO_RED.EPS

MFS® Diversified
Income Fund

TSR_Ribbon_red

Class R6-DIFHX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Diversified Income Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment ~ Costs paid as a percentage of a $10,000 investment (annualized) ~
R6 $28 0.55%

˜ Expenses are direct expenses and do not include underlying fund fees and expenses.

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,771,014,850 Portfolio Turnover Rate (%): 22
Total Number of Holdings: 1,376

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 ~ 61.4%
Equities 37.0%
Money Market Funds 1.5%
Purchased Options 0.1%

Equity sectors

Real Estate 12.5%
Health Care 4.9%
Financials 4.2%
Consumer Staples 3.6%
Energy 2.9%
Industrials 2.4%
Consumer Discretionary 1.9%
Information Technology 1.6%
Utilities 1.4%
Communication Services 1.0%
Materials 0.5%
Convertible Debt 0.1%

Composition including fixed income credit
quality

AAA 1.2%
AA 0.9%
A 6.2%
BBB 12.2%
BB 16.2%
B 10.9%
CCC 3.0%
CC 0.0%
C 0.2%
D 0.2%
U.S. Government 3.8%
Federal Agencies 5.9%
Not Rated 0.7%
Non-Fixed Income 37.1%
Money Market Funds 1.5%

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.

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.

~ The fund invests a portion of its assets in Exchange-Traded Funds (ETFs) or Options on ETFs to gain fixed income exposure. Percentages include the direct exposure from investing in ETFs or Options on ETFs and not the indirect exposure to the underlying holdings.

The fund invests a portion of its assets in the MFS High Yield Pooled Portfolio. Percentages include the indirect exposure to the underlying holdings of the MFS High Yield Pooled Portfolio and not the direct exposure from investing in the MFS High Yield Pooled Portfolio itself.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

DIFR6-SEM

MFSLOGO_RED.EPS

MFS® Government
Securities Fund

TSR_Ribbon_red

Class A-MFGSX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Government Securities Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
A $38 0.77%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,916,146,033 Average Effective Maturity (yrs): 6.6
Total Number of Holdings: 812 Average Effective Duration (yrs): 5.5
Portfolio Turnover Rate (%): 87

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 91.8%
Money Market Funds 8.2%

Composition including fixed income credit
quality

AAA 6.3%
AA 1.4%
A 0.2%
U.S. Government 27.1%
Federal Agencies 56.8%
Money Market Funds 8.2%

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.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

MFGA-SEM

MFSLOGO_RED.EPS

MFS® Government
Securities Fund

TSR_Ribbon_red

Class B-MFGBX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Government Securities Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
B $75 1.52%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,916,146,033 Average Effective Maturity (yrs): 6.6
Total Number of Holdings: 812 Average Effective Duration (yrs): 5.5
Portfolio Turnover Rate (%): 87

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 91.8%
Money Market Funds 8.2%

Composition including fixed income credit quality

AAA 6.3%
AA 1.4%
A 0.2%
U.S. Government 27.1%
Federal Agencies 56.8%
Money Market Funds 8.2%

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.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

MFGB-SEM

MFSLOGO_RED.EPS

MFS® Government
Securities Fund

TSR_Ribbon_red

Class C-MFGDX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Government Securities Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
C $75 1.52%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,916,146,033 Average Effective Maturity (yrs): 6.6
Total Number of Holdings: 812 Average Effective Duration (yrs): 5.5
Portfolio Turnover Rate (%): 87

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 91.8%
Money Market Funds 8.2%

Composition including fixed income credit quality

AAA 6.3%
AA 1.4%
A 0.2%
U.S. Government 27.1%
Federal Agencies 56.8%
Money Market Funds 8.2%

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.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

MFGC-SEM

MFSLOGO_RED.EPS

MFS® Government
Securities Fund

TSR_Ribbon_red

Class I-MGSIX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Government Securities Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
I $26 0.52%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,916,146,033 Average Effective Maturity (yrs): 6.6
Total Number of Holdings: 812 Average Effective Duration (yrs): 5.5
Portfolio Turnover Rate (%): 87

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 91.8%
Money Market Funds 8.2%

Composition including fixed income credit quality

AAA 6.3%
AA 1.4%
A 0.2%
U.S. Government 27.1%
Federal Agencies 56.8%
Money Market Funds 8.2%

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.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

MFGI-SEM

MFSLOGO_RED.EPS

MFS® Government
Securities Fund

TSR_Ribbon_red

Class R1-MFGGX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Government Securities Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
R1 $76 1.52%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,916,146,033 Average Effective Maturity (yrs): 6.6
Total Number of Holdings: 812 Average Effective Duration (yrs): 5.5
Portfolio Turnover Rate (%): 87

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 91.8%
Money Market Funds 8.2%

Composition including fixed income credit quality

AAA 6.3%
AA 1.4%
A 0.2%
U.S. Government 27.1%
Federal Agencies 56.8%
Money Market Funds 8.2%

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.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

MFGR1-SEM

MFSLOGO_RED.EPS

MFS® Government
Securities Fund

TSR_Ribbon_red

Class R2-MGVSX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Government Securities Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
R2 $51 1.02%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,916,146,033 Average Effective Maturity (yrs): 6.6
Total Number of Holdings: 812 Average Effective Duration (yrs): 5.5
Portfolio Turnover Rate (%): 87

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 91.8%
Money Market Funds 8.2%

Composition including fixed income credit quality

AAA 6.3%
AA 1.4%
A 0.2%
U.S. Government 27.1%
Federal Agencies 56.8%
Money Market Funds 8.2%

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.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

MFGR2-SEM

MFSLOGO_RED.EPS

MFS® Government
Securities Fund

TSR_Ribbon_red

Class R3-MFGHX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Government Securities Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
R3 $38 0.77%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,916,146,033 Average Effective Maturity (yrs): 6.6
Total Number of Holdings: 812 Average Effective Duration (yrs): 5.5
Portfolio Turnover Rate (%): 87

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 91.8%
Money Market Funds 8.2%

Composition including fixed income credit quality

AAA 6.3%
AA 1.4%
A 0.2%
U.S. Government 27.1%
Federal Agencies 56.8%
Money Market Funds 8.2%

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.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

MFGR3-SEM

MFSLOGO_RED.EPS

MFS® Government
Securities Fund

TSR_Ribbon_red

Class R4-MFGJX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Government Securities Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
R4 $26 0.52%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,916,146,033 Average Effective Maturity (yrs): 6.6
Total Number of Holdings: 812 Average Effective Duration (yrs): 5.5
Portfolio Turnover Rate (%): 87

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 91.8%
Money Market Funds 8.2%

Composition including fixed income credit quality

AAA 6.3%
AA 1.4%
A 0.2%
U.S. Government 27.1%
Federal Agencies 56.8%
Money Market Funds 8.2%

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.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

MFGR4-SEM

MFSLOGO_RED.EPS

MFS® Government
Securities Fund

TSR_Ribbon_red

Class R6-MFGKX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS Government Securities Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
R6 $21 0.42%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 1,916,146,033 Average Effective Maturity (yrs): 6.6
Total Number of Holdings: 812 Average Effective Duration (yrs): 5.5
Portfolio Turnover Rate (%): 87

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 91.8%
Money Market Funds 8.2%

Composition including fixed income credit quality

AAA 6.3%
AA 1.4%
A 0.2%
U.S. Government 27.1%
Federal Agencies 56.8%
Money Market Funds 8.2%

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.

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

MFGR6-SEM

MFSLOGO_RED.EPS

MFS® New Discovery
Value Fund

TSR_Ribbon_red

Class A-NDVAX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS New Discovery Value Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
A $64 1.23%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 2,285,841,364 Portfolio Turnover Rate (%): 31
Total Number of Holdings: 146

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 97.6%
Money Market Funds 2.4%

Equity sectors

Financials 25.0%
Health Care 12.6%
Industrials 11.6%
Consumer Discretionary 9.1%
Information Technology 8.8%
Energy 7.9%
Real Estate 7.8%
Utilities 6.0%
Materials 5.7%
Consumer Staples 2.0%
Communication Services 1.1%

Top ten holdings

Plains GP Holdings LP 1.4%
Cathay General Bancorp, Inc. 1.3%
United Community Bank, Inc. 1.2%
Prosperity Bancshares, Inc. 1.2%
Hancock Whitney Corp. 1.2%
First Interstate BancSystem, Inc. 1.2%
Columbia Banking System, Inc. 1.2%
CVB Financial Corp. 1.1%
M/I Homes, Inc. 1.1%
Popular, Inc. 1.1%

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

NDVA-SEM

MFSLOGO_RED.EPS

MFS® New Discovery
Value Fund

TSR_Ribbon_red

Class B-NDVBX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS New Discovery Value Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
B $102 1.97%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 2,285,841,364 Portfolio Turnover Rate (%): 31
Total Number of Holdings: 146

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 97.6%
Money Market Funds 2.4%

Equity sectors

Financials 25.0%
Health Care 12.6%
Industrials 11.6%
Consumer Discretionary 9.1%
Information Technology 8.8%
Energy 7.9%
Real Estate 7.8%
Utilities 6.0%
Materials 5.7%
Consumer Staples 2.0%
Communication Services 1.1%

Top ten holdings

Plains GP Holdings LP 1.4%
Cathay General Bancorp, Inc. 1.3%
United Community Bank, Inc. 1.2%
Prosperity Bancshares, Inc. 1.2%
Hancock Whitney Corp. 1.2%
First Interstate BancSystem, Inc. 1.2%
Columbia Banking System, Inc. 1.2%
CVB Financial Corp. 1.1%
M/I Homes, Inc. 1.1%
Popular, Inc. 1.1%

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

NDVB-SEM

MFSLOGO_RED.EPS

MFS® New Discovery
Value Fund

TSR_Ribbon_red

Class C-NDVCX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS New Discovery Value Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
C $103 1.98%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 2,285,841,364 Portfolio Turnover Rate (%): 31
Total Number of Holdings: 146

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 97.6%
Money Market Funds 2.4%

Equity sectors

Financials 25.0%
Health Care 12.6%
Industrials 11.6%
Consumer Discretionary 9.1%
Information Technology 8.8%
Energy 7.9%
Real Estate 7.8%
Utilities 6.0%
Materials 5.7%
Consumer Staples 2.0%
Communication Services 1.1%

Top ten holdings

Plains GP Holdings LP 1.4%
Cathay General Bancorp, Inc. 1.3%
United Community Bank, Inc. 1.2%
Prosperity Bancshares, Inc. 1.2%
Hancock Whitney Corp. 1.2%
First Interstate BancSystem, Inc. 1.2%
Columbia Banking System, Inc. 1.2%
CVB Financial Corp. 1.1%
M/I Homes, Inc. 1.1%
Popular, Inc. 1.1%

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

NDVC-SEM

MFSLOGO_RED.EPS

MFS® New Discovery
Value Fund

TSR_Ribbon_red

Class I-NDVIX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS New Discovery Value Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
I $51 0.98%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 2,285,841,364 Portfolio Turnover Rate (%): 31
Total Number of Holdings: 146

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 97.6%
Money Market Funds 2.4%

Equity sectors

Financials 25.0%
Health Care 12.6%
Industrials 11.6%
Consumer Discretionary 9.1%
Information Technology 8.8%
Energy 7.9%
Real Estate 7.8%
Utilities 6.0%
Materials 5.7%
Consumer Staples 2.0%
Communication Services 1.1%

Top ten holdings

Plains GP Holdings LP 1.4%
Cathay General Bancorp, Inc. 1.3%
United Community Bank, Inc. 1.2%
Prosperity Bancshares, Inc. 1.2%
Hancock Whitney Corp. 1.2%
First Interstate BancSystem, Inc. 1.2%
Columbia Banking System, Inc. 1.2%
CVB Financial Corp. 1.1%
M/I Homes, Inc. 1.1%
Popular, Inc. 1.1%

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

NDVI-SEM

MFSLOGO_RED.EPS

MFS® New Discovery
Value Fund

TSR_Ribbon_red

Class R1-NDVRX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS New Discovery Value Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
R1 $102 1.98%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 2,285,841,364 Portfolio Turnover Rate (%): 31
Total Number of Holdings: 146

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 97.6%
Money Market Funds 2.4%

Equity sectors

Financials 25.0%
Health Care 12.6%
Industrials 11.6%
Consumer Discretionary 9.1%
Information Technology 8.8%
Energy 7.9%
Real Estate 7.8%
Utilities 6.0%
Materials 5.7%
Consumer Staples 2.0%
Communication Services 1.1%

Top ten holdings

Plains GP Holdings LP 1.4%
Cathay General Bancorp, Inc. 1.3%
United Community Bank, Inc. 1.2%
Prosperity Bancshares, Inc. 1.2%
Hancock Whitney Corp. 1.2%
First Interstate BancSystem, Inc. 1.2%
Columbia Banking System, Inc. 1.2%
CVB Financial Corp. 1.1%
M/I Homes, Inc. 1.1%
Popular, Inc. 1.1%

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

NDVR1-SEM

MFSLOGO_RED.EPS

MFS® New Discovery
Value Fund

TSR_Ribbon_red

Class R2-NDVSX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS New Discovery Value Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
R2 $77 1.48%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 2,285,841,364 Portfolio Turnover Rate (%): 31
Total Number of Holdings: 146

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 97.6%
Money Market Funds 2.4%

Equity sectors

Financials 25.0%
Health Care 12.6%
Industrials 11.6%
Consumer Discretionary 9.1%
Information Technology 8.8%
Energy 7.9%
Real Estate 7.8%
Utilities 6.0%
Materials 5.7%
Consumer Staples 2.0%
Communication Services 1.1%

Top ten holdings

Plains GP Holdings LP 1.4%
Cathay General Bancorp, Inc. 1.3%
United Community Bank, Inc. 1.2%
Prosperity Bancshares, Inc. 1.2%
Hancock Whitney Corp. 1.2%
First Interstate BancSystem, Inc. 1.2%
Columbia Banking System, Inc. 1.2%
CVB Financial Corp. 1.1%
M/I Homes, Inc. 1.1%
Popular, Inc. 1.1%

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

NDVR2-SEM

MFSLOGO_RED.EPS

MFS® New Discovery
Value Fund

TSR_Ribbon_red

Class R3-NDVTX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS New Discovery Value Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
R3 $63 1.22%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 2,285,841,364 Portfolio Turnover Rate (%): 31
Total Number of Holdings: 146

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 97.6%
Money Market Funds 2.4%

Equity sectors

Financials 25.0%
Health Care 12.6%
Industrials 11.6%
Consumer Discretionary 9.1%
Information Technology 8.8%
Energy 7.9%
Real Estate 7.8%
Utilities 6.0%
Materials 5.7%
Consumer Staples 2.0%
Communication Services 1.1%

Top ten holdings

Plains GP Holdings LP 1.4%
Cathay General Bancorp, Inc. 1.3%
United Community Bank, Inc. 1.2%
Prosperity Bancshares, Inc. 1.2%
Hancock Whitney Corp. 1.2%
First Interstate BancSystem, Inc. 1.2%
Columbia Banking System, Inc. 1.2%
CVB Financial Corp. 1.1%
M/I Homes, Inc. 1.1%
Popular, Inc. 1.1%

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

NDVR3-SEM

MFSLOGO_RED.EPS

MFS® New Discovery
Value Fund

TSR_Ribbon_red

Class R4-NDVUX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS New Discovery Value Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
R4 $51 0.98%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 2,285,841,364 Portfolio Turnover Rate (%): 31
Total Number of Holdings: 146

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 97.6%
Money Market Funds 2.4%

Equity sectors

Financials 25.0%
Health Care 12.6%
Industrials 11.6%
Consumer Discretionary 9.1%
Information Technology 8.8%
Energy 7.9%
Real Estate 7.8%
Utilities 6.0%
Materials 5.7%
Consumer Staples 2.0%
Communication Services 1.1%

Top ten holdings

Plains GP Holdings LP 1.4%
Cathay General Bancorp, Inc. 1.3%
United Community Bank, Inc. 1.2%
Prosperity Bancshares, Inc. 1.2%
Hancock Whitney Corp. 1.2%
First Interstate BancSystem, Inc. 1.2%
Columbia Banking System, Inc. 1.2%
CVB Financial Corp. 1.1%
M/I Homes, Inc. 1.1%
Popular, Inc. 1.1%

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

NDVR4-SEM

MFSLOGO_RED.EPS

MFS® New Discovery
Value Fund

TSR_Ribbon_red

Class R6-NDVVX

Semiannual Shareholder Report

This semiannual shareholder report contains important information about MFS New Discovery Value Fund for the period of March 1, 2026 to August 31, 2026. You can find additional information about the fund at funds.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)
Class Name Costs of a $10,000 investment Costs paid as a percentage of a $10,000 investment (annualized)
R6 $45 0.87%

FUND STATISTICS AS OF 8/31/26

Net Assets ($): 2,285,841,364 Portfolio Turnover Rate (%): 31
Total Number of Holdings: 146

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 97.6%
Money Market Funds 2.4%

Equity sectors

Financials 25.0%
Health Care 12.6%
Industrials 11.6%
Consumer Discretionary 9.1%
Information Technology 8.8%
Energy 7.9%
Real Estate 7.8%
Utilities 6.0%
Materials 5.7%
Consumer Staples 2.0%
Communication Services 1.1%

Top ten holdings

Plains GP Holdings LP 1.4%
Cathay General Bancorp, Inc. 1.3%
United Community Bank, Inc. 1.2%
Prosperity Bancshares, Inc. 1.2%
Hancock Whitney Corp. 1.2%
First Interstate BancSystem, Inc. 1.2%
Columbia Banking System, Inc. 1.2%
CVB Financial Corp. 1.1%
M/I Homes, Inc. 1.1%
Popular, Inc. 1.1%

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 funds.mfs.com. Proxy voting information is available without charge by calling 1‑800‑225‑2606, 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 1-800-225-2606 or the shareholder's financial intermediary to request that copies of these reports and summary prospectuses be sent personally to that shareholder.

NDVR6-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 to the Registrant.

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 Diversified Income Fund

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

MFS Diversified Income Fund

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 – 37.9%

Aerospace & Defense – 0.2%

Boeing Co., 5.15%, 5/01/2030 

$

561,000

$562,622

Boeing Co., 5.805%, 5/01/2050 

1,882,000

1,774,067

Honeywell Aerospace, Inc., 4.6%, 3/16/2033 

668,000

645,895

Honeywell Aerospace, Inc., 4.95%, 3/16/2036 

668,000

641,712

Honeywell Aerospace, Inc., 5.732%, 3/16/2056 

307,000

291,710

Huntington Ingalls Industries, Inc., 5.749%, 1/15/2035 

324,000

326,808

$4,242,814

Asset-Backed & Securitized – 1.4%

3650R Commercial Mortgage Trust, 2021-PF1, “XA”, 1.096%, 11/15/2054 (i)

$

6,315,709

$187,716

Affirm, Inc., 2026-X1, “A”, 4.27%, 4/15/2031 (n)

224,106

224,023

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

484,477

484,056

Angel Oak Mortgage Trust, 2024-13, “A1”, 5.464%, 12/26/2069 (n)

661,173

659,000

ARDN Mortgage Trust, 2025-ARCP, “A”, FLR, 5.389% (SOFR - 1mo. + 1.75%), 6/15/2035 (n)

1,097,000

1,098,714

AREIT 2022-CRE6 Trust, “AS”, FLR, 5.286% (SOFR - 30 day + 1.65%), 1/20/2037 (n)

946,500

945,371

ARI Fleet Lease Trust, 2023-B, “A2”, 6.05%, 7/15/2032 (n)

20,089

20,128

AutoNation Finance Trust, 2026-N1A, “A2”, 4.48%, 2/15/2029 (n)

195,000

194,825

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

900,000

901,317

BBCMS Mortgage Trust, 2021-C9, “XA”, 1.659%, 2/15/2054 (i)

3,311,847

178,890

BBCMS Mortgage Trust, 2022-C18, “XA”, 0.656%, 12/15/2055 (i)

4,143,352

124,421

BDS Ltd., 2024-FL13, “A”, FLR, 5.223% (SOFR - 1mo. + 1.5762%), 9/19/2039 (n)

333,076

333,229

Benchmark 2021-B24 Mortgage Trust, “XA”, 1.19%, 3/15/2054 (i)

6,160,910

206,574

Benchmark 2021-B26 Mortgage Trust, “XA”, 0.934%, 6/15/2054 (i)

6,102,573

168,012

Benchmark 2021-B27 Mortgage Trust, “XA”, 1.343%, 7/15/2054 (i)

7,215,688

292,632

Benchmark 2022-B36 Mortgage Trust, “XA”, 0.808%, 7/15/2055 (i)

6,928,501

240,233

Business Jet Securities LLC, 2024-1A, “A”, 6.197%, 5/15/2039 (n)

125,700

126,584

BX Trust, 2026-CLS, “A”, 5.039%, 5/15/2043 (n)

399,000

399,499

BX Trust, 2026-LBTY, “A”, FLR, 4.9% (SOFR - 1mo. + 1.25%), 8/15/2048 (n)

289,509

289,507

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

147,000

146,946

Citigroup Commercial Mortgage Trust, 2019-XA, “C7”, 0.938%, 12/15/2072 (i)(n)

8,316,892

193,907

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

478,438

476,699

Commercial Mortgage Pass-Through Certificates, 2021-BN32, “XA”, 0.811%, 4/15/2054 (i)

4,528,375

114,125

Commercial Mortgage Pass-Through Certificates, 2022-BN43, “XA”, 1.067%, 8/15/2055 (i)

7,850,482

334,674

Commercial Mortgage Pass-Through Certificates, 2024-CBM, “A2”, 5.867%, 12/10/2041 (n)

201,342

201,969

CPS Auto Receivables Trust, 2026-C, “A”, 4.52%, 4/15/2030 (n)

171,490

171,456

ELM Trust, 2024-ELM, “A10”, 5.994%, 6/10/2039 (n)

1,030,787

1,029,768

EQT Trust, 2024-EXTR, “B”, 5.655%, 7/05/2041 (n)

234,585

234,850

Exeter Automobile Receivables Trust, 2026-2A, “A2”, 4.31%, 11/15/2028 

492,365

492,397

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

243,889

243,678

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

186,000

185,943

Home Owner Mortgage Enhanced, 5.077%, 8/25/2060 (n)

399,022

391,723

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)

322,874

322,275

KREF 2018-FT1 Ltd., “AS”, FLR, 5.054% ((SOFR - 1mo. + 0.11448%) + 1.3%), 2/15/2039 (n)

9,159

9,158

LAD Select Auto Receivables Trust, 2026-A, “A2”, 4.59%, 4/16/2029 (n)

258,000

257,973

MF1 2021-FL7 Ltd., “A”, FLR, 4.833% ((SOFR - 1mo. + 0.11448%) + 1.08%), 10/16/2036 (n)

146,247

146,243

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

471,359

471,356

MF1 2024-FL5 LLC, “A”, FLR, 5.327% (SOFR - 1mo. + 1.688%), 8/18/2041 (n)

1,151,000

1,151,707

Morgan Stanley Capital I Trust, 2018-H4, “XA”, 0.966%, 12/15/2051 (i)

8,451,064

124,450

DIFFS-SEM

1


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Asset-Backed & Securitized – continued

Morgan Stanley Capital I Trust, 2021-L5, “XA”, 1.301%, 5/15/2054 (i)

$

2,338,360

$97,016

Morgan Stanley Residential Mortgage Loan Trust, 2024-NQM3, “A1”, 5.044%, 7/25/2069 (n)

224,452

222,449

Morgan Stanley Residential Mortgage Loan Trust, 2025-NQM3, “A1”, 5.53%, 5/25/2070 (n)

289,795

288,738

Morgan Stanley Residential Mortgage Loan Trust, 2026-INV1, “A9”, FLR, 4.793% (SOFR - 1mo. + 1.15%), 2/25/2061 (n)

238,418

236,626

MTN Commercial Mortgage Trust, 2026-LPFX, “A”, 5.153%, 5/15/2043 (n)

100,000

98,715

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

455,625

446,859

New Residential Mortgage Loan Trust, 2026-NQM8, “A1”, 5.564%, 8/25/2066 (n)

310,055

308,542

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

918,899

902,645

OBX Trust, 2024-NQM1, “A1”, 5.928%, 11/25/2063 (n)

196,497

196,301

OBX Trust, 2024-NQM1, “A2”, 6.253%, 11/25/2063 (n)

53,038

52,989

OBX Trust, 2024-NQM15, “A1”, 5.316%, 10/25/2064 (n)

124,582

124,295

OBX Trust, 2024-NQM16, “A1”, 5.53%, 10/25/2064 (n)

224,256

224,105

OBX Trust, 2024-NQM3, “A1”, 6.129%, 12/25/2063 (n)

238,909

238,931

OBX Trust, 2025-NQM8, “A1”, 5.472%, 3/25/2065 (n)

218,387

217,701

Ocwen Loan Investment Trust, 2026-HB3, “A”, 3%, 6/25/2039 (n)

191,325

187,410

Palmer Square Loan Funding, 2024-3A Ltd., “A2R”, FLR, 4.907% (SOFR - 3mo. + 1.15%), 8/08/2032 (n)

250,000

250,052

Palmer Square Loan Funding, 2025-2A Ltd., “A2”, FLR, 5.153% (SOFR - 3mo. + 1.4%), 7/15/2033 (n)

1,225,000

1,225,167

PFS Financing Corp., 2023-C, “B”, 5.91%, 10/15/2028 (n)

208,000

208,346

PFS Financing Corp., 2025-A, “A”, FLR, 4.286% (SOFR - 1mo. + 0.65%), 1/15/2029 (n)

692,000

692,200

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

169,264

168,889

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

919,584

912,652

Provident Funding Mortgage Trust, 2024-1, “A3”, 5.5%, 12/25/2054 (n)

296,946

295,420

Provident Funding Mortgage Trust, 2025-3, “A4”, 5.5%, 8/25/2055 (n)

697,800

694,105

RCKT Trust, 2025-1A, “A”, 4.9%, 7/25/2034 (n)

32,561

32,587

Santander Drive Auto Receivables Trust, 2026-1, “A2”, 4.04%, 3/15/2029 

229,863

229,665

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

387,461

383,954

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

948,207

948,349

Verus Securitization Trust, 2024-1, “A2”, 5.915%, 1/25/2069 (n)

102,971

102,816

Virginia Power Fuel Securitization LLC, 5.088%, 5/01/2027 

135,902

136,121

Wells Fargo Commercial Mortgage Trust, 2018-C48, “XA”, 1.098%, 1/15/2052 (i)(n)

4,775,566

76,251

$24,125,572

Auto & Auto Components – 0.1%

Ford Motor Credit Co. LLC, 5.753%, 4/06/2033 

$

580,000

$570,775

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

661,000

684,380

Stellantis Financial Services US Corp., 5.4%, 6/15/2029 (n)

643,000

635,138

$1,890,293

Brokerage & Asset Managers – 0.4%

Blue Owl Finance LLC, 6.75%, 8/18/2036 

$

579,000

$577,633

Carlyle Group, Inc., 5.05%, 9/19/2035 

441,000

416,843

Charles Schwab Corp., 6.136% to 8/24/2033, FLR (SOFR - 1 day + 2.01%) to 8/24/2034 

500,000

520,755

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

762,000

724,868

Charles Schwab Corp., 5.493% to 5/21/2036, FLR (SOFR - 1 day + 1.28%) to 5/21/2037 

924,000

910,875

Citadel Securities Global Holdings LLC, 5.5%, 6/18/2030 (n)

643,000

644,466

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

800,000

776,350

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

469,000

458,664

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

753,000

713,023

LPL Holdings, Inc., 4.625%, 11/15/2027 (n)

440,000

436,964

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

724,000

689,172

LPL Holdings, Inc., 5.65%, 3/15/2035 

902,000

883,465

$7,753,078

2


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Building – 0.3%

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

$

1,167,000

$1,130,222

JH North America Holdings, Inc., 5.875%, 1/31/2031 (n)

565,000

568,611

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

516,000

520,541

Martin Marietta Materials, Inc., 5.625%, 8/15/2036 

573,000

573,043

Martin Marietta Materials, Inc., 5.5%, 12/01/2054 

216,000

196,933

Martin Marietta Materials, Inc., 6.375%, 8/15/2056 

564,000

576,018

Vulcan Materials Co., 4.5%, 6/15/2047 

419,000

340,148

Vulcan Materials Co., 5.7%, 12/01/2054 

581,000

550,951

$4,456,467

Business Services – 0.2%

Automatic Data Processing, Inc., 5%, 5/07/2036 

$

594,000

$576,745

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

692,000

656,782

Experian PLC, 5.35%, 8/24/2036 (n)

640,000

623,113

Paychex, Inc., 5.35%, 4/15/2032 

897,000

896,200

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

541,000

489,537

$3,242,377

Cable TV – 0.2%

Charter Communications Operating LLC/Charter Communications Operating Capital Corp., 6.384%, 10/23/2035 

$

444,000

$432,839

Charter Communications Operating LLC/Charter Communications Operating Capital Corp., 7.087%, 9/01/2038 (n)

345,000

341,566

Comcast Corp., 5.35%, 5/15/2053 

844,000

694,519

United Group B.V., 6.25%, 1/31/2032 (n)

EUR

520,000

606,471

Videotron Ltd., 3.625%, 6/15/2029 (n)

$

483,000

464,768

Videotron Ltd., 5.7%, 1/15/2035 (n)

726,000

712,087

$3,252,250

Chemicals – 0.1%

Dangote Fertiliser Ltd., 7.75%, 5/05/2031 (n)

$

834,000

$837,033

ICL Group Ltd., 6.036%, 6/16/2036 (n)

731,000

720,925

Maxam Prill S.à r.l., 7.75%, 7/15/2030 (n)

705,000

728,694

$2,286,652

Conglomerates – 0.3%

Eaton Corp. PLC, 4.5%, 3/06/2033 

$

794,000

$764,733

Eaton Corp. PLC, 4.8%, 3/06/2036 

484,000

462,619

GE Vernova, Inc., 4.875%, 2/04/2036 

699,000

670,878

nVent Finance S.à r.l., 5.65%, 5/15/2033 

855,000

864,708

Regal Rexnord Corp., 6.05%, 4/15/2028 

903,000

918,411

Regal Rexnord Corp., 6.3%, 2/15/2030 

171,000

176,272

Regal Rexnord Corp., 6.4%, 4/15/2033 

258,000

267,914

Westinghouse Air Brake Technologies Corp., 4.7%, 9/15/2028 

563,000

561,779

Westinghouse Air Brake Technologies Corp., 5.611%, 3/11/2034 

527,000

531,714

$5,219,028

Consumer Products – 0.1%

Haleon US Capital LLC, 3.625%, 3/24/2032 

$

685,000

$634,812

Haleon US Capital LLC, 5.375%, 8/21/2036 

1,009,000

1,002,291

$1,637,103

3


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Consumer Services – 0.2%

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

$

768,000

$782,447

Meituan, 4.5%, 5/05/2031 (n)

786,000

754,725

Rentokil Terminix Funding PLC, 4.625%, 4/23/2031 (n)

200,000

194,093

Rentokil Terminix LLC, 5%, 4/28/2030 (n)

923,000

916,366

$2,647,631

Containers – 0.1%

San Miguel Industrias PET S.A., 3.75%, 8/02/2028 (n)

$

2,000,000

$1,940,000

Diversified Financial Services – 0.5%

Avolon Holdings Funding Ltd., 2.75%, 2/21/2028 (n)

$

1,192,000

$1,154,857

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

625,000

602,334

Blackstone Secured Lending Fund, 5.35%, 4/13/2028 

416,000

414,772

Blackstone Secured Lending Fund, 5.9%, 5/21/2031 

381,000

373,505

Blue Owl Credit Income Corp., 6.55%, 10/15/2031 (n)

932,000

926,006

Goldman Sachs Private Credit Corp., 6.15%, 6/16/2031 (n)

536,000

530,270

IIFL Finance Ltd., 7.6%, 9/10/2029 (n)

729,000

737,840

Macquarie AirFinance Holdings Ltd., 5.15%, 3/17/2030 (n)

939,000

930,089

Muangthai Capital PCL, 7.55%, 7/21/2030 (n)

403,000

407,745

Muthoot Finance Ltd., 7.125%, 2/14/2028 (n)

714,000

720,767

Muthoot Finance Ltd., 6.375%, 3/02/2030 (n)

669,000

668,195

SMBC Aviation Capital Finance DAC, 5.3%, 4/03/2029 (n)

911,000

917,240

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

530,000

509,143

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

480,000

474,172

Tata Capital Ltd., 5.332%, 1/21/2030 

200,000

199,638

$9,566,573

Electrical Equipment – 0.0%

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

$

785,000

$793,442

Emerging Market Quasi-Sovereign – 3.5%

Abu Dhabi Crude Oil Pipeline, 4.6%, 11/02/2047 

$

870,000

$750,823

Al Jawaher Assets Co. SPC (Sultanate of Oman), 4.662%, 10/29/2030 (n)

803,000

781,744

Aloqabank JSC (Republic of Uzbekistan), 7.7%, 5/18/2031 (n)

427,000

425,483

Avilease Capital Ltd. (Kingdom of Saudi Arabia), 4.75%, 11/12/2030 (n)

1,002,000

972,148

Baiterek National Investment Holding JSC (Republic of Kazakhstan), 5.45%, 5/08/2028 (n)

640,000

644,055

Baiterek National Investment Holding JSC (Republic of Kazakhstan), 4.65%, 10/01/2030 (n)

306,000

300,063

Baiterek National Investment Holding JSC (Republic of Kazakhstan), 5.2%, 5/06/2033 (n)

772,000

761,964

Banco Nacional de Comercio Exterior, S.N.C. (United Mexican States), 6%, 5/14/2036 (n)

619,000

613,119

Bank Gospodarstwa Krajowego (Republic of Poland), 5.375%, 5/22/2033 (n)

1,041,000

1,040,056

Bank Gospodarstwa Krajowego (Republic of Poland), 4.25%, 3/18/2037 

EUR

364,000

422,172

Bulgarian Energy Holding EAD, 2.45%, 7/22/2028 

1,054,000

1,183,594

Bulgarian Energy Holding EAD, 4.25%, 6/19/2030 

515,000

590,628

Chile Electricity Lux MPC II S.à r.l., 6.01%, 1/20/2033 (n)

$

395,175

404,082

Chile Electricity Lux MPC II S.à r.l., 5.58%, 10/20/2035 (n)

664,703

662,709

Chile Electricity Lux MPC II S.à r.l., 5.672%, 10/20/2035 (n)

708,736

712,230

Codelco, Inc. (Republic of Chile), 6.33%, 1/13/2035 (n)

720,000

740,448

Codelco, Inc. (Republic of Chile), 6.44%, 1/26/2036 (n)

597,000

621,854

Codelco, Inc. (Republic of Chile), 5.529%, 1/30/2037 (n)

688,000

666,528

Codelco, Inc. (Republic of Chile), 6.78%, 1/13/2055 (n)

817,000

840,856

Comisión Ejecutiva Hidroeléctrica del Río Lempa (Republic of El Salvador), 8.65%, 1/24/2033 (n)

330,000

356,235

Comision Federal de Electricidad (United Mexican States), 6.045%, 1/28/2034 (n)

824,000

802,164

Corporacion Financiera de Desarrollo S.A. (Republic of Peru), 5.95%, 4/30/2029 (n)

1,013,000

1,033,371

Corporacion Financiera de Desarrollo S.A. (Republic of Peru), 5.5%, 5/06/2030 (n)

423,000

425,940

4


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Emerging Market Quasi-Sovereign – continued

DAE Funding LLC (United Arab Emirates), 4.95%, 1/15/2033 (n)

$

700,000

$669,196

DAE Sukuk (DIFC) Ltd. (United Arab Emirates), 4.5%, 10/16/2030 (n)

735,000

711,473

Danantara Investment (Republic of Indonesia), 5.35%, 6/18/2031 (n)

619,000

614,198

Danantara Investment (Republic of Indonesia), 5.95%, 6/18/2036 (n)

627,000

617,579

Dhafrah PV2 Energy Co. LLC (United Arab Emirates), 5.794%, 6/30/2053 (n)

812,744

785,293

Dua Capital Ltd. (Federation of Malaysia), 2.78%, 5/11/2031 

878,000

795,227

Ecopetrol S.A. (Republic of Colombia), 8.375%, 1/19/2036 

724,000

765,749

El Fondo Mivivienda S.A. (Republic of Peru), 5.4%, 3/31/2031 (n)

840,000

840,611

Empresa Nacional del Petroleo (Republic of Chile), 5.25%, 11/06/2029 

495,000

496,486

Empresa Nacional del Petroleo (Republic of Chile), 5.95%, 7/30/2034 (n)

487,000

488,706

Empresa Nacional del Petroleo (Republic of Chile), 4.5%, 9/14/2047 

895,000

708,768

Eskom Holdings SOC Ltd. (Republic of South Africa), 6.35%, 8/10/2028 (n)

684,000

694,996

Export-Import Bank of India, 5.5%, 1/18/2033 (n)

1,143,000

1,146,734

Export-Import Bank of India, 5.5%, 1/13/2035 (n)

1,099,000

1,094,971

Export-Import Bank of India, 5%, 1/12/2036 (n)

1,048,000

1,000,997

Export-Import Bank of India, 5.75%, 1/12/2056 (n)

455,000

433,344

GACI First Investment Co. (Kingdom of Saudi Arabia), 5.25%, 5/14/2033 

874,000

864,540

Grupo Energia Bogota S.A. ESP (Republic of Colombia), 5.75%, 10/22/2035 (n)

687,000

671,062

Indian Railway Finance Corp., 2.8%, 2/10/2031 (n)

1,354,000

1,218,803

JSC National Co. Kazakhstan Temir Zholy, 4.875%, 4/29/2031 (n)

518,000

505,192

JSC National Co. Kazakhstan Temir Zholy, 5.25%, 4/29/2036 (n)

468,000

447,676

JSC National Co. QazaqGaz (Republic of Kazakhstan), 5.625%, 5/08/2036 (n)

695,000

680,369

JSCB Agrobank (Republic of Uzbekistan), 9.25%, 10/02/2029 (n)

399,000

430,762

Ma'aden Sukuk Ltd. (Kingdom of Saudi Arabia), 5.25%, 2/13/2030 (n)

1,287,000

1,285,010

Ma'aden Sukuk Ltd. (Kingdom of Saudi Arabia), 5.25%, 1/29/2036 (n)

1,211,000

1,177,868

Magyar Export-Import Bank PLC (Republic of Hungary), 6.125%, 12/04/2027 (n)

798,000

807,689

Magyar Fejlesztesi Bank Zrt. (Republic of Hungary), 4.375%, 6/27/2030 

EUR

523,000

618,546

MVM Energetika Zartkoruen Mukodo Reszvenytarsasag (Republic of Hungary), 6.5%, 3/13/2031 

$

852,000

884,236

National Bank of Uzbekistan, 8.5%, 7/05/2029 

668,000

706,388

Navoi Mining & Metallurgical Co. (Republic of Uzbekistan), 6.75%, 5/14/2030 (n)

1,234,000

1,271,665

Navoi Mining & Metallurgical Co. (Republic of Uzbekistan), 6.95%, 10/17/2031 (n)

752,000

787,998

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

675,000

700,472

Office Cherifien des Phosphates S.A. (Kingdom of Morocco), 6.7%, 3/01/2036 (n)

723,000

743,120

Office Cherifien des Phosphates S.A. (Kingdom of Morocco), 7.5%, 5/02/2054 (n)

407,000

423,788

Office Cherifien des Phosphates S.A. (Kingdom of Morocco), 6.741%, 4/22/2174 (n)

879,000

870,197

Ooredoo International Finance Ltd. (State of Qatar), 4.625%, 10/10/2034 (n)

662,000

642,235

Petroleos de Venezuela S.A., 6%, 11/15/2026 (a)(d)

1,796,000

717,502

Petroleos de Venezuela S.A., 6%, 5/16/2027 (a)(d)

1,810,568

716,985

Petroleos Mexicanos, 6.75%, 9/21/2047 

1,119,000

939,345

Petroleos Mexicanos, 7.69%, 1/23/2050 

1,582,000

1,441,321

Petroleos Mexicanos, 6.95%, 1/28/2060 

335,000

274,700

PETRONAS Capital Ltd. (Federation of Malaysia), 4.95%, 1/03/2031 (n)

1,199,000

1,198,543

PETRONAS Capital Ltd. (Federation of Malaysia), 5.34%, 4/03/2035 (n)

1,187,000

1,189,806

PETRONAS Capital Ltd. (Federation of Malaysia), 5.848%, 4/03/2055 (n)

319,000

314,357

PT Bank Mandiri Tbk (Republic of Indonesia), 5.25%, 4/10/2031 

720,000

713,003

PT Pertamina Hulu Energi (Republic of Indonesia), 5.25%, 5/21/2030 (n)

858,000

851,672

PT Perusahaan Listrik Negara (Republic of Indonesia), 5.45%, 2/03/2036 (n)

920,000

867,019

QNB Finance Ltd. (State of Qatar), 2.75%, 2/12/2027 

1,129,000

1,119,540

SA Global Sukuk Ltd. (Kingdom of Saudi Arabia), 4.125%, 9/17/2030 (n)

1,023,000

983,371

Saudi Arabian Oil Co., 5%, 2/02/2036 (n)

726,000

697,971

Saudi Arabian Oil Co., 5.75%, 7/17/2054 (n)

638,000

576,725

Sonangol Finance Ltd. (Republic of Angola), 10%, 1/29/2031 (n)

1,019,000

1,047,086

State Oil Co. of the Azerbaijan Republic, 5.83%, 7/07/2035 

574,000

570,186

State Oil Co. of the Azerbaijan Republic, 6.57%, 7/07/2056 

571,000

566,906

5


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Emerging Market Quasi-Sovereign – continued

STC Sukuk Co. II Ltd. (Kingdom of Saudi Arabia), 4.489%, 1/15/2031 (n)

$

507,000

$495,136

STC Sukuk Co. II Ltd. (Kingdom of Saudi Arabia), 5.083%, 1/15/2036 (n)

510,000

499,698

T.C. Ziraat Bankasi A.S. (Republic of Turkey), 7.25%, 2/04/2030 (n)

586,000

589,142

Telecommunications Co. (Republic of Serbia), 7%, 10/28/2029 (n)

886,000

882,210

Turkiye Ihracat Kredi Bankasi A.S., 6.125%, 5/02/2029 (n)

415,000

409,911

Turkiye Vakiflar Bankasi T.A.O., 6.875%, 1/07/2030 (n)

712,000

708,743

Uzbekneftegaz JSC (Republic of Uzbekistan), 4.75%, 11/16/2028 (n)

324,000

314,621

$62,039,709

Emerging Market Sovereign – 8.7%

Arab Republic of Egypt, 0%, 11/10/2026 

EGP

60,800,000

$1,144,242

Arab Republic of Egypt, 0%, 12/29/2026 

40,650,000

741,729

Arab Republic of Egypt, 5.875%, 2/16/2031 

$

1,366,000

1,320,646

Arab Republic of Egypt, 7.903%, 2/21/2048 

1,528,000

1,358,079

Arab Republic of Egypt, 8.875%, 5/29/2050 

1,830,000

1,794,287

Benin Sukuk S.A., 6.2%, 1/29/2033 (n)

433,000

420,548

Commonwealth of Bahamas, 8.25%, 6/24/2036 (n)

522,000

575,421

Democratic Socialist Republic of Sri Lanka, 3.35%, 3/15/2033 (n)

1,630,525

1,564,024

Democratic Socialist Republic of Sri Lanka, 3.6%, 5/15/2036 (n)

565,350

577,864

Democratic Socialist Republic of Sri Lanka, 3.6%, 2/15/2038 (n)

498,971

511,671

Dominican Republic, 7.05%, 2/03/2031 (n)

1,196,000

1,252,212

Dominican Republic, 4.875%, 9/23/2032 (n)

839,000

789,919

Dominican Republic, 4.875%, 9/23/2032 

824,000

775,796

Dominican Republic, 6%, 2/22/2033 (n)

610,000

606,950

Dominican Republic, 6.15%, 5/17/2038 (n)

755,000

733,105

Eagle Funding LuxCo S.à r.l. (United Mexican States), 5.5%, 8/17/2030 (n)

1,109,000

1,107,336

Federal Republic of Nigeria, 0%, 9/22/2026 

NGN

1,132,434,000

837,350

Federal Republic of Nigeria, 0%, 10/20/2026 

1,168,112,000

851,028

Federal Republic of Nigeria, 0%, 10/27/2026 

1,062,282,000

770,972

Federal Republic of Nigeria, 7.875%, 2/16/2032 

$

704,000

739,691

Federal Republic of Nigeria, 7.375%, 9/28/2033 

1,553,000

1,584,851

Federal Republic of Nigeria, 8.631%, 1/13/2036 (n)

703,000

760,930

Federal Republic of Nigeria, 7.696%, 2/23/2038 

595,000

603,201

Federative Republic of Brazil, 6.625%, 3/15/2035 

684,000

690,635

Federative Republic of Brazil, 6.25%, 5/22/2036 

846,000

819,774

Federative Republic of Brazil, 7.25%, 1/12/2056 

474,000

454,898

Gabonese Republic, 9.375%, 8/05/2033 (n)

436,000

391,925

Government of Honduras, 6.4%, 7/29/2036 (n)

929,000

931,787

Government of Ukraine, 4%, 2/01/2032 (n)

2,512,960

2,061,247

Government of Ukraine, 0%, 2/01/2034 (n)

779,905

432,580

Government of Ukraine, 4.5%, 2/01/2034 (n)

188,729

129,345

Government of Ukraine, 0%, 2/01/2035 (n)

217,038

124,950

Government of Ukraine, 4.5%, 2/01/2035 (n)

440,367

296,351

Government of Ukraine, 4.5%, 2/01/2036 (n)

629,096

417,742

Hazine Mustesarligi Varlik Kiralama A.S. (Republic of Turkey), 6.5%, 4/26/2030 (n)

631,000

631,277

Hazine Mustesarligi Varlik Kiralama A.S. (Republic of Turkey), 6.75%, 9/01/2030 (n)

672,000

674,927

Hazine Mustesarligi Varlik Kiralama A.S. (Republic of Turkey), 6.7%, 7/02/2032 (n)

729,000

724,646

Islamic Republic of Pakistan, 6.975%, 4/24/2029 (n)

842,000

844,310

Kingdom of Saudi Arabia, 4.875%, 1/12/2036 (n)

835,000

802,439

Kingdom of Saudi Arabia, 4.625%, 10/04/2047 

697,000

557,670

Kingdom of Saudi Arabia, 3.25%, 11/17/2051 (n)

736,000

452,252

Kingdom of Saudi Arabia, 5.875%, 1/12/2056 (n)

968,000

896,538

Oriental Republic of Uruguay, 8%, 10/29/2035 

UYU

25,941,309

649,675

Oriental Republic of Uruguay, 5.442%, 2/14/2037 

$

967,000

963,132

6


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Emerging Market Sovereign – continued

Oriental Republic of Uruguay, 4.975%, 4/20/2055 

$

753,000

$641,933

Oriental Republic of Uruguay, 5.25%, 9/10/2060 

940,742

824,560

Republic of Angola, 9.244%, 1/15/2031 (n)

679,000

712,797

Republic of Angola, 8.75%, 4/14/2032 (n)

782,000

798,871

Republic of Angola, 9.375%, 3/31/2033 (n)

1,039,000

1,075,367

Republic of Angola, 9.875%, 3/31/2037 (n)

849,000

878,451

Republic of Angola, 9.375%, 5/08/2048 

349,000

332,451

Republic of Angola, 9.125%, 11/26/2049 

1,922,000

1,778,862

Republic of Argentina, 4.125%, 7/09/2035 

4,857,000

3,669,463

Republic of Argentina, 5%, 1/09/2038 

3,749,000

2,972,957

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

4,236,000

2,981,297

Republic of Barbados, 8%, 6/26/2035 (n)

690,000

730,820

Republic of Benin, 7.96%, 2/13/2038 (n)

816,000

862,219

Republic of Benin, 8.375%, 1/23/2041 (n)

533,000

573,780

Republic of Chile, 5.65%, 1/13/2037 

1,491,000

1,508,892

Republic of Chile, 4.375%, 8/03/2038 

EUR

728,481

836,193

Republic of Chile, 4.75%, 8/03/2046 

620,138

717,457

Republic of Colombia, 6.125%, 1/21/2031 

$

632,000

630,926

Republic of Colombia, 6.5%, 1/21/2033 

894,000

892,212

Republic of Colombia, 6.25%, 7/09/2036 

COP

4,064,700,000

816,520

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

$

2,791,000

2,968,228

Republic of Colombia, 12.75%, 11/28/2040 

COP

2,870,400,000

886,434

Republic of Colombia, 9.25%, 5/28/2042 

3,940,600,000

938,228

Republic of Congo, 8.75%, 4/16/2032 (n)

$

366,000

377,579

Republic of Congo, 9.5%, 4/16/2037 (n)

442,000

461,681

Republic of Costa Rica, 7%, 4/04/2044 

272,000

286,862

Republic of Costa Rica, 7.158%, 3/12/2045 

1,215,000

1,293,939

Republic of Costa Rica, 7.3%, 11/13/2054 (n)

1,185,000

1,279,575

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

1,331,000

1,413,982

Republic of Cote d'Ivoire, 8.075%, 4/01/2036 (n)

1,090,000

1,173,225

Republic of Cote d'Ivoire, 8.25%, 1/30/2037 (n)

1,910,000

2,069,361

Republic of Cote d'Ivoire, 6.75%, 2/25/2041 (n)

623,000

589,897

Republic of Ecuador, 8.75%, 1/29/2034 (n)

1,086,000

1,083,285

Republic of Ecuador, 6.9%, 7/31/2035 

3,195,789

2,922,549

Republic of Ecuador, 9.25%, 1/29/2039 (n)

1,012,000

1,020,602

Republic of Ecuador, 5.5%, 7/31/2040 

2,239,000

1,830,382

Republic of El Salvador, 7.65%, 6/15/2035 

273,000

282,823

Republic of El Salvador, 9.65%, 11/21/2054 (n)

619,000

703,351

Republic of Guatemala, 3.7%, 10/07/2033 

936,000

821,948

Republic of Guatemala, 6.6%, 6/13/2036 (n)

703,000

733,693

Republic of Guatemala, 6.25%, 8/15/2036 (n)

1,013,000

1,035,955

Republic of Guatemala, 6.25%, 8/15/2036 

312,000

319,070

Republic of Guatemala, 6.55%, 2/06/2037 (n)

794,000

826,046

Republic of Guatemala, 6.875%, 8/15/2055 (n)

491,000

514,106

Republic of Honduras, 8.625%, 11/27/2034 

788,000

905,002

Republic of Hungary, 5.375%, 9/26/2030 (n)

698,000

703,418

Republic of Hungary, 5.5%, 6/16/2034 (n)

1,509,000

1,511,788

Republic of Hungary, 6%, 9/26/2035 (n)

454,000

463,624

Republic of Hungary, 6%, 9/26/2035 

2,123,000

2,168,005

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

903,000

889,282

Republic of Hungary, 5.5%, 3/26/2036 

1,173,000

1,155,181

Republic of Hungary, 4.25%, 5/21/2037 

EUR

888,000

996,880

Republic of Hungary, 6.25%, 9/23/2037 

HUF

291,060,000

970,518

Republic of Hungary, 3%, 10/27/2038 

281,500,000

688,361

7


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Emerging Market Sovereign – continued

Republic of Hungary, 6.75%, 9/23/2055 (n)

$

1,396,000

$1,444,798

Republic of Indonesia, 4.1%, 3/04/2034 

EUR

515,000

578,309

Republic of Indonesia, 5.69%, 5/29/2036 

$

519,000

518,582

Republic of Indonesia, 4.46%, 3/04/2038 

EUR

430,000

473,130

Republic of Montenegro, 4.875%, 4/01/2032 (n)

198,000

230,443

Republic of Panama, 5.227%, 2/23/2034 

$

895,000

865,197

Republic of Panama, 6.4%, 2/14/2035 

906,000

938,616

Republic of Panama, 6.7%, 1/26/2036 

336,000

352,649

Republic of Panama, 5.662%, 2/23/2038 

746,000

725,858

Republic of Panama, 8%, 3/01/2038 

952,000

1,089,136

Republic of Panama, 4.5%, 1/19/2063 

1,037,000

757,529

Republic of Paraguay, 8.5%, 4/04/2038 (n)

PYG

6,685,000,000

1,088,123

Republic of Paraguay, 5.4%, 3/30/2050 (n)

$

1,713,000

1,495,483

Republic of Peru, 6.9%, 8/12/2037 

PEN

2,846,000

859,270

Republic of Peru, 7.6%, 8/12/2039 

1,827,000

576,483

Republic of Peru, 5.875%, 8/08/2054 

$

173,000

164,264

Republic of Peru, 6.2%, 6/30/2055 

264,000

260,726

Republic of Philippines, 8%, 7/19/2031 

PHP

42,335,000

706,912

Republic of Philippines, 5%, 1/27/2036 

$

978,000

940,682

Republic of Poland, 5.375%, 2/12/2035 

1,349,000

1,340,263

Republic of Poland, 5.375%, 4/14/2036 

1,156,000

1,139,544

Republic of Poland, 6.125%, 4/14/2056 

1,926,000

1,854,777

Republic of Romania, 3.625%, 3/27/2032 

1,082,000

963,292

Republic of Romania, 7.5%, 7/27/2033 

RON

2,380,000

541,085

Republic of Romania, 6.375%, 1/30/2034 (n)

$

554,000

551,897

Republic of Romania, 6%, 5/25/2034 (n)

928,000

905,272

Republic of Romania, 5.75%, 3/24/2035 

1,220,000

1,160,955

Republic of Romania, 6.625%, 5/16/2036 (n)

1,680,000

1,681,839

Republic of Romania, 5.75%, 7/04/2036 (n)

1,074,000

1,009,429

Republic of Romania, 7.5%, 2/10/2037 (n)

610,000

648,787

Republic of Romania, 6.5%, 10/07/2045 (n)

EUR

446,000

505,891

Republic of Serbia, 6%, 6/12/2034 (n)

$

854,000

853,274

Republic of Serbia, 5.5%, 5/06/2036 (n)

1,069,000

1,022,241

Republic of South Africa, 7.1%, 11/19/2036 (n)

1,486,000

1,583,270

Republic of South Africa, 6.125%, 12/11/2037 (n)

1,159,000

1,129,865

Republic of South Africa, 6.5%, 2/28/2041 

ZAR

23,183,000

1,127,501

Republic of South Africa, 8.75%, 1/31/2044 

4,876,000

287,199

Republic of South Africa, 7.3%, 4/20/2052 

$

1,812,000

1,779,072

Republic of South Africa, 7.95%, 11/19/2054 (n)

1,529,000

1,613,737

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

879,000

854,950

Republic of Suriname, 7.7%, 11/06/2030 (n)

336,000

345,223

Republic of Suriname, 8.5%, 11/06/2035 (n)

443,000

477,448

Republic of Turkey, 6.375%, 5/22/2031 

738,000

730,560

Republic of Turkey, 5.875%, 6/26/2031 

1,529,000

1,487,146

Republic of Turkey, 6.5%, 1/03/2035 

592,000

571,098

Republic of Turkey, 6.95%, 9/16/2035 

1,186,000

1,168,231

Republic of Turkey, 4.875%, 4/16/2043 

580,000

427,629

Republic of Turkey, 5.75%, 5/11/2047 

1,575,000

1,244,079

Republic of Uzbekistan, 5.375%, 2/20/2029 

1,081,000

1,078,941

Republic of Uzbekistan, 6.947%, 5/25/2032 (n)

771,000

814,835

Republic of Venezuela, 7.65%, 4/21/2027 (a)(d)

882,000

425,565

Republic of Venezuela, 9.25%, 9/15/2027 (a)(d)

3,699,000

1,914,232

Republic of Venezuela, 11.95%, 8/05/2031 (a)(d)

1,291,000

739,098

Republic of Zambia, 5.75%, 6/30/2033 

290,171

284,966

8


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Emerging Market Sovereign – continued

State of Kuwait, 5.509%, 7/29/2036 (n)

$

712,000

$712,165

Sultanate of Oman, 6.5%, 3/08/2047 

809,000

820,172

Sultanate of Oman, 6.75%, 1/17/2048 

1,657,000

1,724,141

United Mexican States, 5.85%, 7/02/2032 

1,166,000

1,169,381

United Mexican States, 5.625%, 2/09/2034 

1,401,000

1,359,040

United Mexican States, 5.625%, 9/22/2035 

914,000

875,155

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

703,000

722,051

United Mexican States, 6.25%, 8/27/2037 

834,000

818,154

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

698,000

699,047

United Mexican States, 6.125%, 2/09/2038 

1,030,000

992,405

United Mexican States, 6.338%, 5/04/2053 

622,000

559,178

$154,671,110

Energy - Independent – 0.2%

APA Corp., 6.1%, 2/15/2035 

$

212,000

$216,477

APA Corp., 6.75%, 2/15/2055 

385,000

395,425

Azule Energy Finance PLC, 8.25%, 1/22/2031 (n)

488,000

495,203

Azule Energy Finance PLC, 8.625%, 1/22/2033 (n)

280,000

287,058

Occidental Petroleum Corp., 4.4%, 4/15/2046 

625,000

503,248

Pioneer Natural Resources Co., 1.9%, 8/15/2030 

717,000

640,243

Pioneer Natural Resources Co., 2.15%, 1/15/2031 

501,000

446,159

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

381,000

405,922

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

321,000

316,473

SierraCol Energy Andina LLC/SierraCol Energy, 9%, 11/14/2030 (n)

628,000

640,303

$4,346,511

Energy - Integrated – 0.1%

BP Capital Markets America, Inc., 3.001%, 3/17/2052 

$

1,126,000

$690,539

Eni S.p.A., 6%, 5/18/2056 (n)

671,000

640,593

$1,331,132

Entertainment & Leisure – 0.1%

Carnival Corp., 5.875%, 6/15/2031 (n)

$

508,000

$509,737

Carnival Corp., 5.75%, 8/01/2032 (n)

227,000

224,645

Carnival Corp., 6.125%, 2/15/2033 (n)

377,000

377,914

Royal Caribbean Cruises Ltd., 5.625%, 9/30/2031 (n)

590,000

590,887

$1,703,183

Food & Beverages – 0.6%

Anheuser-Busch InBev Worldwide, Inc., 5.55%, 1/23/2049 

$

1,859,000

$1,753,681

Bacardi Ltd., 5.15%, 5/15/2038 (n)

1,632,000

1,491,044

Central American Bottling Corp., 5.25%, 4/27/2029 (n)

1,214,000

1,192,440

Flowers Foods, Inc., 5.75%, 3/15/2035 

418,000

393,850

JBS N.V./JBS USA Foods Group Holdings, Inc./JBS USA Food Co., 3%, 2/02/2029 

360,000

344,344

JBS N.V./JBS USA Foods Group Holdings, Inc./JBS USA Food Co., 3.75%, 12/01/2031 

242,000

223,903

JBS N.V./JBS USA Foods Group Holdings, Inc./JBS USA Food Co., 3.625%, 1/15/2032 

371,000

340,817

JBS N.V./JBS USA Foods Group Holdings, Inc./JBS USA Food Co., 6.5%, 12/01/2052 

399,000

386,739

Kraft Heinz Foods Co., 4.875%, 10/01/2049 

406,000

330,681

Kraft Heinz Foods Co., 5.5%, 6/01/2050 

511,000

451,420

Mars, Inc., 4.75%, 4/20/2033 (n)

1,024,000

994,916

Mars, Inc., 3.95%, 4/01/2049 (n)

758,000

570,538

Mars, Inc., 5.7%, 5/01/2055 (n)

932,000

880,688

9


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Food & Beverages – continued

SYSCO Corp., 4.45%, 3/15/2048 

$

640,000

$499,580

$9,854,641

Global Systemically Important Banks – 1.8%

Bank of America Corp., 3.419% to 12/20/2027, FLR ((SOFR - 3mo. + 0.26161%) + 1.04%) to 12/20/2028 

$

1,704,000

$1,676,821

Bank of America Corp., 5.819% to 9/15/2028, FLR (SOFR - 1 day + 1.57%) to 9/15/2029 

989,000

1,007,458

Bank of America Corp., 2.687% to 4/22/2031, FLR (SOFR - 1 day + 1.32%) to 4/22/2032 

2,307,000

2,067,194

Bank of New York Mellon Corp., 5.182% to 8/12/2033, FLR (SOFR - 1 day + 1.035%) to 8/12/2034 

813,000

806,664

BNP Paribas S.A., 6.875% to 12/15/2033, FLR (CMT - 5yr. + 2.853%) to 6/15/2174 (n)

732,000

717,032

Goldman Sachs Group, Inc., 4.692% to 10/23/2029, FLR (SOFR - 1 day + 1.135%) to 10/23/2030 

704,000

695,643

Goldman Sachs Group, Inc., 4.972% to 6/03/2031, FLR (SOFR - 1 day + 1.03%) to 6/03/2032 

580,000

570,968

Goldman Sachs Group, Inc., 5.24% to 7/21/2031, FLR (SOFR - 1 day + 1.17%) to 7/21/2032 

591,000

587,608

Goldman Sachs Group, Inc., 5.016% to 10/23/2034, FLR (SOFR - 1 day + 1.42%) to 10/23/2035 

471,000

452,171

Goldman Sachs Group, Inc., 5.065% to 1/21/2036, FLR (SOFR - 1 day + 1.19%) to 1/21/2037 

840,000

797,589

HSBC Holdings PLC, 5.13% to 3/03/2030, FLR (SOFR - 1 day + 1.29%) to 3/03/2031 

342,000

341,152

HSBC Holdings PLC, 2.357% to 8/18/2030, FLR (SOFR - 1 day + 1.947%) to 8/18/2031 

554,000

497,605

HSBC Holdings PLC, 5.208% to 5/12/2033, FLR (SOFR - 1 day + 1.32%) to 5/12/2034 

528,000

516,739

HSBC Holdings PLC, 5.279% to 3/10/2036, FLR (SOFR - 1 day + 1.55%) to 3/10/2037 

650,000

624,846

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

350,000

347,300

JPMorgan Chase & Co., 5.581% to 4/22/2029, FLR (SOFR - 1 day + 1.16%) to 4/22/2030 

788,000

800,266

JPMorgan Chase & Co., 2.545% to 11/08/2031, FLR (SOFR - 1 day + 1.18%) to 11/08/2032 

3,189,000

2,803,014

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

499,000

482,878

JPMorgan Chase & Co., 4.898% to 1/22/2036, FLR (SOFR - 1 day + 1.07%) to 1/22/2037 

887,000

843,412

JPMorgan Chase & Co., 5.803% to 7/23/2036, FLR (CMT - 5yr. + 1.25%) to 7/23/2041 

906,000

896,078

Mitsubishi UFJ Financial Group, Inc., 1.64% to 10/13/2026, FLR (CMT - 1yr. + 0.67%) to 10/13/2027 

2,438,000

2,430,056

Mitsubishi UFJ Financial Group, Inc., 2.494% to 10/13/2031, FLR (CMT - 1yr. + 0.97%) to 10/13/2032 

2,019,000

1,765,371

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

705,000

712,271

Morgan Stanley, 5.424% to 7/21/2033, FLR (SOFR - 1 day + 1.88%) to 7/21/2034 

450,000

447,873

Morgan Stanley, 5.073% to 1/30/2036, FLR (SOFR - 1 day + 1.184%) to 1/30/2037 

1,580,000

1,506,264

Royal Bank of Canada, 4.95%, 8/05/2032 

1,188,000

1,174,858

Sumitomo Mitsui Financial Group, Inc., 1.71%, 1/12/2031 

1,589,000

1,379,379

UBS Group AG, 5.58%, 5/09/2036 (n)

2,681,000

2,666,251

UBS Group AG, 3.179% to 2/11/2042, FLR (CMT - 1yr. + 1.1%) to 2/11/2043 (n)

633,000

456,506

UBS Group AG, 7% to 8/05/2035, FLR (USD SOFR ICE Swap Rate - 5yr. + 3.296%) to 8/05/2172 (n)

413,000

412,084

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

569,000

576,759

$31,060,110

Hardware, Peripherals, & Assembly – 0.0%

Apple, Inc., 2.65%, 5/11/2050 

$

1,169,000

$681,563

Industrial – 0.2%

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

$

508,000

$499,958

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

530,000

525,465

Jacobs Solutions, Inc., 5.375%, 3/03/2036 

770,000

737,355

WSP Global, Inc., 5.039%, 9/18/2031 (n)

470,000

460,488

WSP Global, Inc., 5.714%, 9/18/2036 (n)

836,000

806,038

$3,029,304

Insurance – 0.3%

Athene Holding Ltd., 6.15%, 8/15/2036 

$

707,000

$699,477

Corebridge Financial, Inc., 3.9%, 4/05/2032 

369,000

341,473

Corebridge Financial, Inc., 4.35%, 4/05/2042 

862,000

709,736

Corebridge Global Funding, 4.9%, 8/21/2032 (n)

518,000

503,450

10


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Insurance – continued

Equitable America Global Funding, 5.125%, 6/15/2031 (n)

$

921,000

$911,600

Northwestern Mutual Life Insurance Co., 6.17%, 5/29/2055 (n)

752,000

741,377

Pacific Life Insurance Co., 5.95%, 9/15/2055 (n)

696,000

658,239

Sammons Financial Group, Inc., 4.75%, 4/08/2032 (n)

859,000

808,373

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

116,000

110,707

$5,484,432

Insurance - Health – 0.2%

Elevance Health, Inc., 5.65%, 6/15/2054 

$

559,000

$512,566

Horseshoe Funding Trust II, 6.887%, 11/15/2055 (n)

601,000

604,156

Humana, Inc., 5.375%, 4/15/2031 

341,000

341,648

Humana, Inc., 5.55%, 5/01/2035 

346,000

339,006

Humana, Inc., 4.95%, 10/01/2044 

560,000

470,811

UnitedHealth Group, Inc., 2.3%, 5/15/2031 

438,000

388,506

UnitedHealth Group, Inc., 5.5%, 7/15/2044 

529,000

499,341

UnitedHealth Group, Inc., 5.875%, 2/15/2053 

569,000

546,811

$3,702,845

Insurance - Property & Casualty – 0.3%

Arthur J. Gallagher & Co., 6.5%, 2/15/2034 

$

381,000

$402,612

Arthur J. Gallagher & Co., 6.75%, 2/15/2054 

731,000

769,926

Brown & Brown, Inc., 5.25%, 6/23/2032 

261,000

256,896

Brown & Brown, Inc., 6.25%, 6/23/2055 

154,000

147,967

Fairfax Financial Holdings Ltd., 3.375%, 3/03/2031 

197,000

182,054

Fairfax Financial Holdings Ltd., 5.625%, 8/16/2032 

312,000

314,431

Fairfax Financial Holdings Ltd., 6.5%, 5/20/2055 

888,000

885,925

Marsh & McLennan Cos., Inc., 4.85%, 11/15/2031 

347,000

342,612

Marsh & McLennan Cos., Inc., 2.9%, 12/15/2051 

431,000

256,224

Marsh & McLennan Cos., Inc., 5.4%, 3/15/2055 

430,000

386,484

Progressive Corp., 5.15%, 3/26/2036 

577,000

563,279

$4,508,410

International Market Quasi-Sovereign – 0.1%

Israel Electric Corp. Ltd., 5.633%, 1/28/2038 (n)

$

721,000

$691,119

NBN Co. Ltd. (Commonwealth of Australia), 5.75%, 10/06/2028 (n)

811,000

826,757

Ontario Teachers' Cadillac Fairview Properties, 2.5%, 10/15/2031 (n)

921,000

806,106

$2,323,982

International Market Sovereign – 0.3%

Government of Bermuda, 5%, 7/15/2032 (n)

$

1,832,000

$1,809,118

State of Israel, 5%, 1/13/2036 

575,000

553,259

State of Israel, 5.875%, 1/13/2056 

3,608,000

3,367,414

$5,729,791

Internet – 0.0%

Alphabet, Inc., 5.45%, 8/15/2036 

$

571,000

$566,500

Local Authorities – 0.1%

Province of Córdoba, 8.6%, 2/03/2035 (n)

$

740,000

$728,900

Provincia de Neuquen Argentina, 7.35%, 8/25/2034 (n)

620,000

609,975

Republic of Argentina, 8.1%, 12/11/2034 (n)

666,000

664,335

$2,003,210

11


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Machinery & Tools – 0.1%

Ashtead Capital, Inc., 5.55%, 5/30/2033 (n)

$

839,000

$834,959

CNH Industrial Capital LLC, 5.5%, 1/12/2029 

446,000

450,828

Sunbelt Rentals Holdings, Inc., 5.65%, 8/12/2036 (n)

347,000

339,679

$1,625,466

Media – 0.2%

Prosus N.V., 4.193%, 1/19/2032 (n)

$

625,000

$588,447

Prosus N.V., 5.873%, 7/13/2036 (n)

853,000

845,933

Prosus N.V., 4.027%, 8/03/2050 (n)

852,000

582,306

Walt Disney Co., 3.5%, 5/13/2040 

738,000

587,778

Walt Disney Co., 3.8%, 5/13/2060 

561,000

388,192

WMG Acquisition Corp., 3.75%, 12/01/2029 (n)

600,000

570,924

WMG Acquisition Corp., 3.875%, 7/15/2030 (n)

654,000

615,135

$4,178,715

Medical & Health Technology & Services – 0.4%

Alcon Finance Corp., 2.75%, 9/23/2026 (n)

$

2,224,000

$2,221,628

Baxter International, Inc., 4.9%, 12/15/2030 

255,000

250,432

Baxter International, Inc., 5.65%, 12/15/2035 

328,000

320,115

CommonSpirit Health, 5.548%, 12/01/2054 

314,000

285,982

CommonSpirit Health, 5.662%, 9/01/2055 

475,000

438,495

HCA, Inc., 4.9%, 11/15/2035 

239,000

226,028

HCA, Inc., 5.7%, 11/15/2055 

541,000

488,748

ICON Investments Six DAC, 5.421%, 8/13/2031 (n)

510,000

507,383

ICON Investments Six DAC, 5.995%, 8/13/2036 (n)

873,000

870,424

Marin General Hospital, 7.242%, 8/01/2045 

839,000

869,591

Thermo Fisher Scientific, Inc., 4.473%, 10/07/2032 

712,000

689,368

Thermo Fisher Scientific, Inc., 2.8%, 10/15/2041 

632,000

444,389

$7,612,583

Medical Equipment – 0.2%

Abbott Laboratories, 4.65%, 3/15/2036 

$

996,000

$943,329

Augusta SpinCo Corp., 4.945%, 3/23/2033 

445,000

435,294

Augusta SpinCo Corp., 5.245%, 3/23/2036 

489,000

476,720

Danaher Corp., 2.6%, 10/01/2050 

1,155,000

657,962

Stryker Corp., 4.625%, 9/11/2034 

942,000

900,579

$3,413,884

Metals & Mining – 0.2%

First Quantum Minerals Ltd., 8%, 3/01/2033 (n)

$

329,000

$342,968

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

1,119,000

1,138,795

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)

1,224,073

1,225,247

$2,707,010

Midstream – 0.6%

Cheniere Energy Partners LP, 5.55%, 10/30/2035 

$

684,000

$681,191

Cheniere Energy Partners LP, 5.35%, 11/30/2036 (n)

352,000

342,327

Columbia Pipelines Operating Co. LLC, 6.497%, 8/15/2043 (n)

781,000

804,300

Eastern Energy Gas Holdings LLC, 5.65%, 10/15/2054 

628,000

572,445

Energy Transfer LP, 4%, 10/01/2027 

465,000

461,838

Energy Transfer LP, 5.95%, 5/15/2054 

900,000

834,566

Enterprise Products Operating LLC, 4.85%, 1/31/2034 

786,000

765,521

12


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Midstream – continued

Esentia Energy Development S.A.B. de C.V., 6.125%, 7/30/2033 (n)

$

830,000

$817,882

Esentia Energy Development S.A.B. de C.V., 6.5%, 7/30/2038 (n)

696,000

674,424

Galaxy Pipeline Assets Bidco Ltd., 1.75%, 9/30/2027 (n)

376,116

369,562

Green Palm Bidco S.à r.l., 5.957%, 6/30/2041 (n)

1,027,000

1,006,109

Plains All American Pipeline LP, 5.95%, 6/15/2035 

998,000

1,010,211

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

363,000

357,684

Targa Resources Corp., 4.95%, 4/15/2052 

1,352,000

1,112,534

Western Midstream Operating LP, 5.7%, 7/01/2036 

699,000

688,320

$10,498,914

Mortgage-Backed – 5.8%

Fannie Mae, 3%, 11/01/2028 - 9/01/2046 

$

1,529,135

$1,415,734

Fannie Mae, 3.5%, 1/25/2030 - 12/01/2047 

2,295,189

2,115,307

Fannie Mae, 2.5%, 11/01/2031 - 10/01/2046 

384,431

330,397

Fannie Mae, 3.5%, 12/25/2031 - 2/25/2036 (i)

196,566

13,612

Fannie Mae, 6.5%, 1/01/2033 - 10/01/2037 

26,462

27,445

Fannie Mae, 3%, 2/25/2033 (i)

285,611

18,970

Fannie Mae, 5.5%, 5/01/2033 - 5/01/2044 

1,421,299

1,433,992

Fannie Mae, 5%, 11/01/2033 - 3/25/2042 

1,917,605

1,899,613

Fannie Mae, 4.5%, 3/01/2034 - 11/25/2042 

958,878

930,322

Fannie Mae, 4.208%, 4/25/2034 

3,092

3,091

Fannie Mae, 6%, 8/01/2034 - 6/01/2038 

68,835

70,774

Fannie Mae, 4%, 9/01/2040 - 7/01/2043 

2,630,701

2,494,783

Fannie Mae, 1%, 3/25/2041 

185,335

162,173

Fannie Mae, 4.108%, 3/25/2041 

23,769

23,703

Fannie Mae, 2.25%, 4/25/2041 

285,128

274,261

Fannie Mae, 4.258%, 7/25/2041 

29,481

29,300

Fannie Mae, 2%, 8/25/2044 

142,185

132,514

Fannie Mae, 4.058%, 12/25/2045 

72,316

71,501

Fannie Mae, 2.242%, 8/25/2046 (i)

670,015

49,432

Fannie Mae, 2.442%, 12/25/2047 (i)

166,296

15,911

Fannie Mae, 4.5%, 3/15/2048 (i)

123,360

28,370

Fannie Mae, 2.392%, 10/25/2048 (i)

414,421

37,123

Fannie Mae, 2.292%, 6/25/2050 (i)

399,577

37,845

Fannie Mae, 2%, 9/25/2050 - 11/25/2051 (i)

481,492

57,066

Fannie Mae, 4%, 9/25/2050 (i)

386,275

73,474

Fannie Mae, 2.5%, 2/25/2051 (i)

174,098

23,396

Fannie Mae, 5.093%, 11/25/2053 

464,384

473,399

Fannie Mae, 5.643%, 11/25/2053 

319,487

328,165

Fannie Mae, 4.543%, 12/25/2053 

125,040

125,527

Fannie Mae, 6.643%, 7/25/2054 

327,540

339,610

Fannie Mae, 4.793%, 10/25/2054 

368,445

368,974

Fannie Mae, 4.993%, 11/25/2054 

808,461

812,987

Fannie Mae, 4.643%, 12/25/2054 

685,144

689,228

Fannie Mae, 5.043%, 12/25/2054 

790,175

795,470

Fannie Mae, 5.143%, 12/25/2054 

845,242

852,600

Fannie Mae, 4.943%, 1/25/2055 

692,232

695,408

Fannie Mae, 6.083%, 3/25/2055 

486,868

487,199

Fannie Mae, UMBS, 2.5%, 8/01/2036 - 9/01/2052 

7,468,283

6,241,454

Fannie Mae, UMBS, 5.5%, 8/01/2038 - 11/01/2052 

490,632

496,489

Fannie Mae, UMBS, 1.5%, 2/01/2042 - 9/01/2051 

1,747,196

1,306,426

Fannie Mae, UMBS, 2%, 2/01/2042 - 2/01/2052 

3,172,589

2,550,688

Fannie Mae, UMBS, 3.5%, 5/01/2049 

318,563

289,695

Fannie Mae, UMBS, 3%, 8/01/2050 - 8/01/2052 

2,437,613

2,094,812

13


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Mortgage-Backed – continued

Fannie Mae, UMBS, 4%, 8/01/2051 

$

327,943

$303,805

Fannie Mae, UMBS, 5%, 8/01/2052 - 3/01/2053 

1,914,095

1,861,190

Fannie Mae, UMBS, 6.5%, 6/01/2053 - 1/01/2054 

450,389

464,304

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

1,974,469

2,005,342

Freddie Mac, 1.486%, 3/25/2027 (i)

2,188,000

11,510

Freddie Mac, 0.692%, 7/25/2027 (i)

41,804,842

132,187

Freddie Mac, 0.53%, 8/25/2027 (i)

31,083,344

102,734

Freddie Mac, 0.476%, 12/25/2027 (i)

183,645

741

Freddie Mac, 0.431%, 1/25/2028 (i)

56,607,800

192,597

Freddie Mac, 0.432%, 1/25/2028 - 5/25/2033 (i)

26,356,928

130,615

Freddie Mac, 0.249%, 2/25/2028 (i)

69,699,500

123,159

Freddie Mac, 0.246%, 4/25/2028 (i)

46,679,303

93,821

Freddie Mac, 0.617%, 10/25/2028 (i)

6,087,848

51,011

Freddie Mac, 0.6%, 5/25/2029 (i)

6,523,706

67,880

Freddie Mac, 1.005%, 7/25/2029 (i)

4,906,286

106,256

Freddie Mac, 1.207%, 7/25/2029 (i)

7,737,161

205,557

Freddie Mac, 1.256%, 8/25/2029 (i)

13,685,551

382,454

Freddie Mac, 0.733%, 1/25/2030 (i)

2,474,430

39,641

Freddie Mac, 1.434%, 1/25/2030 - 6/25/2030 (i)

7,970,982

331,487

Freddie Mac, 1.913%, 4/25/2030 (i)

3,344,437

194,894

Freddie Mac, 1.954%, 4/25/2030 (i)

8,166,315

483,153

Freddie Mac, 1.769%, 5/25/2030 (i)

4,373,949

247,998

Freddie Mac, 1.908%, 5/25/2030 (i)

9,928,903

593,048

Freddie Mac, 5.5%, 6/01/2030 - 9/01/2041 

491,246

497,912

Freddie Mac, 1.2%, 6/25/2030 (i)

3,036,462

107,283

Freddie Mac, 1.701%, 8/25/2030 (i)

3,506,241

193,906

Freddie Mac, 1.261%, 9/25/2030 (i)

2,193,674

91,965

Freddie Mac, 0.404%, 1/25/2031 (i)

12,490,986

130,150

Freddie Mac, 0.87%, 1/25/2031 (i)

4,987,462

156,410

Freddie Mac, 5.481%, 2/25/2031 (i)

2,871,045

49,794

Freddie Mac, 1.321%, 7/25/2031 (i)

3,953,830

208,022

Freddie Mac, 0.954%, 9/25/2031 (i)

5,826,990

217,713

Freddie Mac, 0.434%, 6/25/2032 (i)

17,860,106

308,051

Freddie Mac, 4.101%, 10/15/2032 

19,354

19,343

Freddie Mac, 0.302%, 11/25/2032 (i)

11,453,817

126,853

Freddie Mac, 0.3%, 8/25/2033 (i)

12,475,897

134,690

Freddie Mac, 0.363%, 10/25/2033 (i)

11,781,459

171,060

Freddie Mac, 5%, 5/01/2034 - 12/01/2044 

931,313

926,023

Freddie Mac, 6%, 8/01/2034 - 10/01/2038 

304,132

312,136

Freddie Mac, 1.092%, 9/25/2034 (i)

1,508,629

94,926

Freddie Mac, 0.22%, 1/25/2035 (i)

17,854,931

146,289

Freddie Mac, 0.427%, 1/25/2035 (i)

6,569,974

136,119

Freddie Mac, 3.951%, 4/15/2035 

10,121

10,061

Freddie Mac, 5.5%, 2/15/2036 (i)

87,032

12,998

Freddie Mac, 6.5%, 5/01/2037 

3,290

3,408

Freddie Mac, 4%, 8/01/2037 - 4/15/2044 

1,337,237

1,289,035

Freddie Mac, 4.451%, 5/15/2039 

24,987

25,047

Freddie Mac, 4.5%, 7/01/2039 - 5/01/2042 

533,687

517,520

Freddie Mac, 3%, 7/15/2039 - 10/01/2046 

2,315,587

2,059,483

Freddie Mac, 4.5%, 12/15/2040 (i)

10,904

987

Freddie Mac, 3.5%, 2/01/2042 - 10/25/2058 

1,886,218

1,746,312

Freddie Mac, 4.151%, 8/15/2046 

38,951

38,602

Freddie Mac, 2.249%, 11/15/2048 (i)

785,918

60,489

Freddie Mac, 3%, 2/25/2049 - 10/25/2052 (i)

500,838

59,947

14


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Mortgage-Backed – continued

Freddie Mac, 2.292%, 8/25/2049 (i)

$

319,786

$29,856

Freddie Mac, 2.5%, 11/25/2050 - 3/25/2051 (i)

1,433,286

229,425

Freddie Mac, 2%, 2/25/2051 - 3/25/2052 (i)

1,089,677

135,996

Freddie Mac, 4.843%, 9/25/2053 

813,613

820,128

Freddie Mac, 5.093%, 10/25/2053 

619,057

631,076

Freddie Mac, 5.643%, 11/25/2053 

912,201

937,000

Freddie Mac, 5.873%, 12/25/2053 

448,194

449,232

Freddie Mac, 4.943%, 1/25/2054 - 12/25/2054 

1,605,581

1,620,404

Freddie Mac, 4.743%, 9/25/2054 

680,408

683,706

Freddie Mac, 5.143%, 12/25/2054 

976,520

983,998

Freddie Mac, 6.093%, 1/25/2055 

299,253

301,894

Freddie Mac, 7.593%, 9/25/2055 

87,265

90,140

Freddie Mac, 2.349%, 8/15/2057 (i)

279,425

29,498

Freddie Mac, 3.25%, 11/25/2061 

674,856

618,997

Freddie Mac, UMBS, 2.5%, 3/01/2037 - 9/01/2052 

1,686,279

1,411,383

Freddie Mac, UMBS, 2%, 2/01/2042 - 2/01/2052 

3,591,281

2,865,866

Freddie Mac, UMBS, 3%, 3/01/2047 - 9/01/2052 

1,529,096

1,333,384

Freddie Mac, UMBS, 1.5%, 11/01/2051 

32,414

24,187

Freddie Mac, UMBS, 3.5%, 5/01/2052 

114,050

102,302

Freddie Mac, UMBS, 6%, 10/01/2052 - 7/01/2054 

139,872

141,601

Freddie Mac, UMBS, 5.5%, 4/01/2053 

246,079

247,508

Freddie Mac, UMBS, 6.5%, 11/01/2054 

321,842

333,335

Ginnie Mae, 3.5%, 8/20/2029 - 1/20/2043 (i)

777,168

93,242

Ginnie Mae, 5.5%, 5/15/2033 - 2/20/2053 

2,269,334

2,268,664

Ginnie Mae, 4.5%, 7/20/2033 - 9/20/2041 

1,353,875

1,311,568

Ginnie Mae, 5.646%, 8/20/2034 

161,692

162,904

Ginnie Mae, 4%, 5/16/2039 - 7/20/2052 

405,952

390,206

Ginnie Mae, 5%, 8/20/2039 - 1/20/2053 

893,580

876,600

Ginnie Mae, 4%, 12/20/2039 - 8/16/2042 (i)

252,116

40,203

Ginnie Mae, 1.983%, 3/20/2040 (i)

600,299

37,738

Ginnie Mae, 3.867%, 9/20/2041 

861,341

839,716

Ginnie Mae, 3.5%, 12/15/2041 - 4/20/2047 

2,046,151

1,874,955

Ginnie Mae, 2.5%, 6/20/2042 - 11/20/2051 

2,069,471

1,739,432

Ginnie Mae, 2.433%, 8/20/2044 - 7/20/2050 (i)

807,089

78,891

Ginnie Mae, 2.383%, 12/20/2044 (i)

164,445

10,726

Ginnie Mae, 3%, 4/20/2045 - 2/20/2052 

2,993,336

2,624,174

Ginnie Mae, 1.883%, 10/20/2045 (i)

567,268

39,704

Ginnie Mae, 2.283%, 4/20/2046 (i)

444,389

38,953

Ginnie Mae, 2.496%, 2/16/2048 (i)

331,613

27,789

Ginnie Mae, 2.233%, 2/20/2049 (i)

512,272

37,428

Ginnie Mae, 2.5%, 10/20/2050 - 2/20/2051 (i)

1,171,232

170,756

Ginnie Mae, 2.561%, 5/20/2051 (i)

297,254

34,214

Ginnie Mae, 2.533%, 6/20/2051 (i)

1,073,396

114,979

Ginnie Mae, 2.361%, 7/20/2051 (i)

318,788

31,734

Ginnie Mae, 3%, 2/20/2052 (i)

209,958

34,231

Ginnie Mae, 2%, 3/20/2052 

143,955

115,622

Ginnie Mae, 4.689%, 7/20/2053 - 10/20/2054 

1,722,668

1,729,050

Ginnie Mae, 4.539%, 8/20/2053 

704,251

704,872

Ginnie Mae, 4.639%, 8/20/2053 - 12/20/2064 

2,832,361

2,834,141

Ginnie Mae, 4.889%, 8/20/2053 - 4/20/2055 

1,118,154

1,127,994

Ginnie Mae, 4.989%, 9/20/2053 - 5/20/2055 

2,116,029

2,138,329

Ginnie Mae, 5.039%, 9/20/2053 

848,450

859,661

Ginnie Mae, 4.939%, 10/20/2053 

788,198

796,533

Ginnie Mae, 4.289%, 11/20/2053 

568,237

566,968

15


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Mortgage-Backed – continued

Ginnie Mae, 4.739%, 11/20/2053 - 11/20/2054 

$

3,003,961

$3,022,728

Ginnie Mae, 4.839%, 12/20/2053 - 4/20/2064 

3,508,290

3,527,801

Ginnie Mae, 4.589%, 3/20/2054 

152,035

152,010

Ginnie Mae, 4.838%, 3/20/2054 

702,207

704,526

Ginnie Mae, 4.789%, 6/20/2054 - 3/20/2064 

1,398,101

1,404,177

Ginnie Mae, 5.139%, 5/20/2055 

861,875

869,221

Ginnie Mae, 7.589%, 5/20/2055 

174,305

176,930

Ginnie Mae, 6.117%, 6/20/2055 

511,383

485,844

Ginnie Mae, 6.192%, 6/20/2055 

239,354

227,522

Ginnie Mae, 1.711%, 7/20/2055 (i)

332,621

14,390

Ginnie Mae, 6%, 11/20/2055 

340,893

347,304

Ginnie Mae, 4.369%, 2/20/2056 

263,877

263,297

Ginnie Mae, 2.099%, 12/20/2062 (i)

469,936

20,132

Ginnie Mae, 2.461%, 5/20/2064 (i)

588,508

25,630

Ginnie Mae, 4.462%, 7/20/2064 

61,205

61,335

Ginnie Mae, 4.439%, 8/20/2065 - 2/20/2066 

1,090,621

1,085,639

Ginnie Mae, 4.488%, 9/20/2065 

546,589

547,941

Ginnie Mae, 4.532%, 10/20/2066 

80,732

81,007

Ginnie Mae, 4.552%, 10/20/2066 

199,711

200,505

Ginnie Mae, 4.541%, 1/20/2067 

182,737

183,490

Ginnie Mae, 4.392%, 2/20/2067 

157,322

157,645

Ginnie Mae, 4.506%, 3/20/2067 

309,679

310,452

Ginnie Mae, 4.089%, 5/20/2067 

622,892

621,713

Ginnie Mae, 5.041%, 7/20/2067 

391,530

393,787

Ginnie Mae, 4.232%, 11/20/2067 

128,715

128,438

Ginnie Mae, 4.298%, 4/20/2068 

641,204

641,342

UMBS, TBA, 2.5%, 9/25/2056 

550,000

448,551

UMBS, TBA, 3%, 9/25/2056 

1,025,000

873,363

$103,445,771

Municipals – 0.1%

Kentucky Higher Education Student Loan Corp. Rev., Taxable, “A-2”, 6.195%, 6/01/2040 

$

830,000

$851,480

New Hampshire National Finance Authority, Utility Refunding Rev., Taxable (Wheeling Power Co. Project), “A”,

6.89%, 4/01/2034 

630,000

651,519

$1,502,999

Natural Gas - Distribution – 0.1%

Boston Gas Co., 5.843%, 1/10/2035 (n)

$

920,000

$933,044

Natural Gas - Pipeline – 0.2%

APA Infrastructure Ltd., 5%, 3/23/2035 (n)

$

236,000

$226,232

APA Infrastructure Ltd., 5.75%, 9/16/2044 (n)

1,083,000

1,038,552

Promigas S.A. /Gases del Pacifico S.A.C., 7.75%, 6/24/2056 (n)

517,000

525,996

Spire, Inc., 4.6%, 9/01/2031 

1,118,000

1,087,161

Spire, Inc., 6.25%, 6/01/2056 

757,000

754,530

$3,632,471

Network & Telecom – 0.0%

NTT Finance Corp., 5.171%, 7/16/2032 (n)

$

798,000

$785,147

16


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Non-Global Systemically Important Banks – 1.4%

AIB Group PLC, 6.608% to 9/13/2028, FLR (SOFR - 1 day + 2.33%) to 9/13/2029 (n)

$

994,000

$1,024,844

Banco de Crédito del Perú, 6.45% to 7/30/2030, FLR (CMT - 5yr. + 2.486%) to 7/30/2035 (n)

829,000

846,094

Banco Internacional del Peru S.A.A. (Interbank), 4.8%, 7/15/2031 (n)

734,000

714,975

Banco Mercantil del Norte S.A., 8.45%, 9/24/2174 (n)

733,000

734,099

Banco Mercantil del Norte S.A., 8%, 10/24/2174 (n)

620,000

620,620

Banco Santander Chile, 4.55%, 11/20/2030 (n)

725,000

710,761

Bangkok Bank Public Co. Ltd. (Hong Kong), 3.733% to 9/25/2029, FLR (CMT - 5yr. + 1.9%) to 9/25/2034 

605,000

571,075

Bank Hapoalim B.M., 4.722%, 7/14/2029 (n)

1,229,000

1,206,936

Bank Leumi le-Israel B.M., 5.642%, 6/29/2033 (n)

756,000

756,771

Bank Polska Kasa Opieki S.A., 3.625%, 6/03/2030 

EUR

511,000

588,656

BBVA Bancomer S.A. (Texas), 8.125%, 1/08/2039 (n)

$

476,000

503,935

BBVA Mexico S.A. (CoCo), 8.45% to 6/29/2033, FLR (CMT - 5yr. + 4.661%) to 6/29/2038 (n)

362,000

389,638

BBVA Mexico S.A. Institucion de Banca Multiple Grupo, 5.4%, 6/03/2031 (n)

832,000

823,680

BBVA Mexico S.A. Institucion de Banca Multiple Grupo, 7.625%, 2/11/2035 (n)

485,000

500,035

CaixaBank S.A., 6.84% to 9/13/2033, FLR (SOFR - 1 day + 2.77%) to 9/13/2034 (n)

1,010,000

1,080,187

Commonwealth Bank of Australia, 3.61% to 9/12/2029, FLR (CMT - 1yr. + 2.05%) to 9/12/2034 (n)

818,000

780,162

Commonwealth Bank of Australia, 3.305%, 3/11/2041 (n)

751,000

556,366

Deutsche Bank AG, 5.706% to 2/08/2027, FLR (SOFR - 1 day + 1.594%) to 2/08/2028 

1,091,000

1,095,814

Deutsche Bank AG, 5.373% to 1/10/2028, FLR (SOFR - 1 day + 1.21%) to 1/10/2029 

564,000

567,661

Deutsche Bank AG, 4.95% to 8/04/2030, FLR (SOFR - 1 day + 1.3%) to 8/04/2031 

484,000

476,785

HDFC Bank Ltd./GIFT City, 5.401%, 8/26/2031 (n)

711,000

709,275

ICICI Bank Ltd., 5.459%, 7/30/2031 (n)

719,000

719,640

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

423,000

423,211

Intesa Sanpaolo S.p.A., 7.2%, 11/28/2033 (n)

620,000

684,112

Intesa Sanpaolo S.p.A., 6.005%, 6/29/2037 (n)

457,000

447,586

M&T Bank Corp., 5.053% to 1/27/2033, FLR (SOFR - 1 day + 1.850%) to 1/27/2034 

494,000

480,251

Mizrahi Tefahot Bank Ltd., 5.837%, 4/15/2036 (n)

757,000

753,950

National Australia Bank Ltd., 3.347% to 1/12/2032, FLR (CMT - 5yr. + 1.7%) to 1/12/2037 (n)

1,931,000

1,724,996

Nationwide Building Society, 4.351%, 9/30/2030 (n)

819,000

795,417

NBK SPC Ltd. (State of Kuwait), 5.5% to 6/06/2029, FLR (SOFR - 1 day + 1.16%) to 6/06/2030 (n)

426,000

427,967

Pinnacle Financial Partners, Inc., 5.596% to 5/19/2031, FLR (SOFR - 1 day + 1.7%) to 5/19/2032 

1,377,000

1,361,179

PNC Financial Services Group, Inc., 5.676% to 1/22/2034, FLR (SOFR - 1 day + 1.902%) to 1/22/2035 

698,000

705,421

PNC Financial Services Group, Inc., 5.575% to 1/29/2035, FLR (SOFR - 1 day + 1.394%) to 1/29/2036 

292,000

292,294

$24,074,393

Pharmaceuticals & Biotechnology – 0.4%

AbbVie, Inc., 5.35%, 3/15/2044 

$

1,063,000

$1,002,441

AbbVie, Inc., 5.4%, 3/15/2054 

468,000

428,396

AbbVie, Inc., 6%, 9/15/2056 

360,000

357,742

Bayer U.S. Finance LLC, 5.375%, 7/20/2033 (n)

584,000

576,830

Biocon Biologics Global PLC, 6.67%, 10/09/2029 (n)

751,000

755,124

Eli Lilly & Co., 4.7%, 2/09/2034 

1,155,000

1,127,071

Eli Lilly & Co., 5.5%, 2/12/2055 

272,000

256,178

Merck & Co., Inc., 4.75%, 12/04/2035 

748,000

714,144

Mylan, Inc., 5.2%, 4/15/2048 

271,000

218,946

Pfizer Investment Enterprises Pte. Ltd., 5.3%, 5/19/2053 

275,000

245,913

Pfizer, Inc., 2.55%, 5/28/2040 

715,000

501,295

Viatris, Inc., 4%, 6/22/2050 

774,000

518,233

$6,702,313

Pollution Control – 0.0%

Ambipar Lux S.à r.l., 10.875%, 2/05/2033 (a)(d)(n)

$

488,000

$172,020

17


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Railroads – 0.1%

Burlington Northern Santa Fe LLC, 5.2%, 4/15/2054 

$

1,172,000

$1,044,314

Burlington Northern Santa Fe LLC, 5.5%, 3/15/2055 

356,000

330,916

Canadian Pacific Railway Co., 3.1%, 12/02/2051 

1,362,000

849,677

$2,224,907

Real Estate - Apartment – 0.1%

American Homes 4 Rent LP, REIT, 5.25%, 3/15/2035 

$

1,248,000

$1,214,882

Real Estate - Healthcare – 0.0%

Alexandria Real Estate Equities, Inc., REIT, 7.25% to 2/15/2032, FLR (CMT - 5yr. + 2.889%) to 2/15/2057 

$

567,000

$566,774

Real Estate - Other – 0.0%

Prologis LP, REIT, 5.125%, 1/15/2034 

$

453,000

$447,726

Real Estate - Retail – 0.2%

NNN REIT, Inc., 5.6%, 10/15/2033 

$

449,000

$452,921

Realty Income Corp., REIT, 5.375%, 9/01/2054 

951,000

882,196

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

325,000

320,801

STORE Capital Corp., REIT, 2.75%, 11/18/2030 

1,030,000

922,890

$2,578,808

Real Estate - Storage & Office – 0.2%

Boston Properties LP, REIT, 2.75%, 10/01/2026 

$

637,000

$636,210

COPT Defense Properties, REIT, 2%, 1/15/2029 

494,000

461,733

COPT Defense Properties, REIT, 2.75%, 4/15/2031 

363,000

325,574

Highwoods Realty LP, 4.2%, 4/15/2029 

501,000

488,792

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

908,000

888,559

$2,800,868

Refining – 0.1%

Dangote Petroleum Refinery, 7.5%, 7/16/2031 

$

589,000

$588,431

Raizen Fuels Finance S.A., 6.25%, 7/08/2032 (a)(d)(z)

1,517,000

864,902

$1,453,333

Retail & E-commerce – 0.2%

Alimentation Couche-Tard, Inc., 3.8%, 1/25/2050 (n)

$

683,000

$481,368

Amazon.com, Inc., 5.65%, 3/13/2046 

1,020,000

956,323

Dick's Sporting Goods, 4.1%, 1/15/2052 

967,000

658,670

Home Depot, Inc., 3.9%, 6/15/2047 

1,234,000

928,541

$3,024,902

Semiconductor & Electronic Components – 0.1%

Broadcom, Inc., 5.2%, 7/15/2035 

$

530,000

$505,075

Broadcom, Inc., 4.8%, 2/15/2036 

384,000

352,383

Broadcom, Inc., 5.7%, 1/15/2056 

446,000

401,770

Intel Corp., 5.7%, 2/10/2053 

488,000

435,678

$1,694,906

Software – 0.3%

Kaspi.kz JSC, 6.25%, 3/26/2030 (n)

$

1,064,000

$1,075,313

Microsoft Corp., 2.525%, 6/01/2050 

1,014,000

570,877

Microsoft Corp., 2.5%, 9/15/2050 

1,010,000

565,664

Oracle Corp., 4.95%, 2/04/2031 

584,000

559,608

18


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Software – continued

Oracle Corp., 4.8%, 9/26/2032 

$

273,000

$252,413

Oracle Corp., 5.35%, 5/04/2033 

704,000

663,357

Oracle Corp., 5.7%, 2/04/2036 

572,000

528,896

Oracle Corp., 4%, 7/15/2046 

598,000

383,474

Oracle Corp., 5.55%, 2/06/2053 

538,000

407,101

Salesforce, Inc., 5.55%, 3/15/2036 

766,000

751,993

$5,758,696

Supermarkets – 0.0%

Kroger Co., 5.5%, 9/15/2054 

$

384,000

$344,560

Supranational – 0.1%

African Development Bank, 5.875% to 8/07/2035, FLR (CMT - 5yr. + 1.653%) to 8/07/2174 

$

821,000

$802,650

African Export-Import Bank, 6.25%, 1/23/2032 (n)

717,000

716,046

Corporación Andina de Fomento, 6.75%, 12/17/2173 (n)

613,000

626,792

$2,145,488

Telecommunications - Wireless – 0.3%

American Tower Corp., 5.2%, 2/15/2029 

$

541,000

$544,489

American Tower Corp., 5.45%, 2/15/2034 

305,000

303,715

Cellnex Finance Co. S.A., 3.875%, 7/07/2041 (n)

519,000

402,178

HTA Group Ltd./Mauritius, 6.75%, 4/01/2031 (n)

453,000

457,826

Rogers Communications, Inc., 4.5%, 3/15/2042 

779,000

640,524

T-Mobile USA, Inc., 5.05%, 7/15/2033 

572,000

560,031

T-Mobile USA, Inc., 4.5%, 4/15/2050 

428,000

326,663

T-Mobile USA, Inc., 5.75%, 1/15/2054 

427,000

385,239

Veon Midco B.V., 6.95%, 6/01/2031 (n)

434,000

433,519

Veon Midco B.V., 7.45%, 6/01/2033 (n)

311,000

311,008

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

864,000

773,756

$5,138,948

Tobacco – 0.1%

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

$

639,000

$667,488

Japan Tobacco, Inc., 5.25%, 6/15/2030 (n)

536,000

541,038

$1,208,526

Transportation & Logistics – 0.3%

Adani Ports & Special Economic Zone Ltd., 5%, 8/02/2041 (n)

$

865,000

$745,573

Aeropuertos Dominicanos Siglo XXI S.A., 7%, 6/30/2034 (n)

632,000

654,474

Corporación Quiport S.A. (Republic of Ecuador), 9%, 12/15/2037 (n)

323,000

356,107

Element Fleet Management Corp., 6.319%, 12/04/2028 (n)

898,000

925,396

ERAC USA Finance LLC, 4.7%, 4/30/2031 (n)

533,000

525,569

ERAC USA Finance LLC, 5.25%, 4/30/2036 (n)

494,000

483,468

IRB Infrastructure Developers Ltd., 7.11%, 3/11/2032 (n)

751,000

760,283

Kingston Airport Revenue Ltd., 6.75%, 12/15/2036 (n)

446,538

445,199

Montego Bay Airport Revenue Finance Ltd., 6.6%, 6/15/2035 (n)

543,000

532,846

$5,428,915

Travel, Gaming, & Lodging – 0.2%

Flutter Treasury DAC, 6.375%, 4/29/2029 (n)

$

709,000

$716,930

Flutter Treasury DAC, 5.875%, 6/04/2031 (n)

446,000

438,294

Las Vegas Sands Corp., 5.3%, 5/15/2031 

329,000

325,074

Las Vegas Sands Corp., 6.2%, 8/15/2034 

594,000

600,658

19


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Travel, Gaming, & Lodging – continued

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

$

378,000

$343,149

Marriott International, Inc., 3.5%, 10/15/2032 

347,000

314,897

Sands China Ltd., 2.85%, 3/08/2029 

683,000

646,136

Wynn Macau Ltd., 6.75%, 2/15/2034 (n)

707,000

700,373

$4,085,511

U.S. Government Agencies and Equivalents – 0.0%

Small Business Administration, 5.16%, 2/01/2028 

$

3,388

$3,389

Small Business Administration, 2.21%, 2/01/2033 

40,825

37,779

Small Business Administration, 2.22%, 3/01/2033 

81,951

76,379

Small Business Administration, 3.15%, 7/01/2033 

83,246

79,152

Small Business Administration, 3.16%, 8/01/2033 

103,973

98,159

Small Business Administration, 3.62%, 9/01/2033 

77,646

74,850

$369,708

U.S. Treasury Obligations – 3.8%

U.S. Treasury Bonds, 6.375%, 8/15/2027 

$

106,000

$108,132

U.S. Treasury Bonds, 2.375%, 2/15/2042 

5,989,000

4,229,731

U.S. Treasury Bonds, 3.25%, 5/15/2042 

1,714,000

1,366,580

U.S. Treasury Bonds, 2.875%, 5/15/2043 

6,853,400

5,084,902

U.S. Treasury Bonds, 4.75%, 11/15/2043 

2,027,000

1,926,442

U.S. Treasury Bonds, 4.75%, 2/15/2045 

5,301,000

5,002,612

U.S. Treasury Bonds, 5%, 5/15/2045 

2,193,000

2,132,864

U.S. Treasury Bonds, 5%, 5/15/2046 

2,790,000

2,707,608

U.S. Treasury Bonds, 2.875%, 11/15/2046 (f)

2,136,000

1,498,454

U.S. Treasury Bonds, 4.75%, 2/15/2056 

619,000

573,155

U.S. Treasury Bonds, 5%, 5/15/2056 

2,377,000

2,290,834

U.S. Treasury Notes, 3.625%, 3/31/2028 (f)

8,375,000

8,286,016

U.S. Treasury Notes, 2.375%, 5/15/2029 

6,034,500

5,726,646

U.S. Treasury Notes, 4.5%, 5/31/2029 

2,740,000

2,746,850

U.S. Treasury Notes, 3.875%, 9/30/2029 

4,658,000

4,585,765

U.S. Treasury Notes, 4.625%, 4/30/2031 

2,748,000

2,762,706

U.S. Treasury Notes, 1.625%, 5/15/2031 

4,940,000

4,344,112

U.S. Treasury Notes, 1.875%, 2/15/2032 

5,550,000

4,840,857

U.S. Treasury Notes, 2.75%, 8/15/2032 (f)

7,333,000

6,644,672

$66,858,938

Utilities – 1.4%

Adani Electricity Mumbai Ltd., 3.867%, 7/22/2031 (n)

$

1,362,000

$1,240,359

Adani Transmission Step-One Ltd., 4.25%, 5/21/2036 (n)

1,984,375

1,776,386

AEP Texas, Inc., 5.7%, 5/15/2034 

1,043,000

1,053,149

AEP Transmission Co. LLC, 5.375%, 6/15/2035 

229,000

228,021

AEP Transmission Co. LLC, 5.4%, 3/15/2053 

1,016,000

925,858

AES Andes S.A., 6.25%, 3/14/2032 (n)

456,000

467,247

AES Andes S.A., 8.15% to 6/10/2030, FLR (CMT - 5yr. + 3.835%) to 6/10/2035, FLR (CMT - 5yr. + 4.085%) to 6/10/2050,

FLR (CMT - 5yr. + 4.835%) to 6/10/2055 (n)

434,000

459,020

Alfa Desarrollo S.p.A., 4.55%, 9/27/2051 (n)

1,011,272

792,908

American Transmission Systems, Inc., 2.65%, 1/15/2032 (n)

257,000

226,543

Berkshire Hathaway Energy Co., 5.15%, 11/15/2043 

292,000

264,556

Berkshire Hathaway Energy Co., 4.6%, 5/01/2053 

139,000

110,155

CFE FIBRA E Banco Citi Mexico S.A., 5.875%, 9/23/2040 (n)

715,957

690,398

Cox Asset Mexico S.A. de C.V., 7.125%, 1/08/2032 (n)

279,000

279,755

Cox Asset Mexico S.A. de C.V., 7.75%, 5/08/2036 (n)

240,000

241,416

Duke Energy Carolinas LLC, 2.85%, 3/15/2032 

383,000

341,594

20


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Utilities – continued

Duke Energy Florida LLC, 3.4%, 10/01/2046 

$

388,000

$270,568

Duke Energy Florida LLC, 6.2%, 11/15/2053 

791,000

803,452

Enel Finance International N.V., 7.75%, 10/14/2052 (n)

1,023,000

1,185,622

Energuate Trust, 6.35%, 9/15/2035 (n)

795,000

779,378

Eversource Energy, 4.45%, 12/15/2030 

413,000

401,957

Eversource Energy, 5.5%, 1/01/2034 

413,000

412,490

FirstEnergy Corp., 2.65%, 3/01/2030 

750,000

691,050

Florida Power & Light Co., 3.95%, 3/01/2048 

1,477,000

1,110,038

Georgia Power Co., 4.7%, 5/15/2032 

434,000

426,135

Georgia Power Co., 5.125%, 5/15/2052 

703,000

618,681

Jersey Central Power & Light Co., 2.75%, 3/01/2032 (n)

1,114,000

980,234

MidAmerican Energy Co., 5.85%, 9/15/2054 

806,000

777,970

NextEra Energy Capital Holdings, Inc., 2.44%, 1/15/2032 

470,000

408,830

NextEra Energy, Inc., 6% to 10/01/2031, FLR (CMT - 5yr. + 1.84%) to 10/01/2056 

496,000

489,735

NextEra Energy, Inc., 6.2% to 10/01/2036, FLR (CMT - 5yr. + 1.765%) to 10/01/2056 

331,000

322,580

Northern States Power Co. of Minnesota, 5.05%, 5/15/2035 

577,000

564,709

Pacific Gas & Electric Co., 2.5%, 2/01/2031 

274,000

243,983

Pacific Gas & Electric Co., 4%, 12/01/2046 

503,000

361,647

PSEG Power LLC, 5.2%, 5/15/2030 (n)

688,000

688,769

PSEG Power LLC, 5.75%, 5/15/2035 (n)

569,000

567,543

Public Service Electric & Gas Co., 5.5%, 3/01/2055 

518,000

478,479

Saavi Energia S.à r.l., 8.875%, 2/10/2035 (n)

595,000

654,441

Sociedad Transmisora Metropolitana S.p.A., 6.385%, 12/15/2055 (n)

719,000

715,729

Vistra Operations Co. LLC, 4.7%, 1/31/2031 (n)

699,000

678,226

Vistra Operations Co. LLC, 5.35%, 1/31/2036 (n)

699,000

667,637

Xcel Energy, Inc., 4.6%, 6/01/2032 

615,000

594,689

$24,991,937

Utilities - Other – 0.1%

Aegea Finance S.à r.l., 7.625%, 1/20/2036 (n)

$

693,000

$567,840

National Central Cooling Co. PJSC, 2.5%, 10/21/2027 

957,000

928,750

Nova Securitisation S.à r.l., 5.75%, 2/03/2031 (n)

616,000

590,919

$2,087,509

Total Bonds (Identified Cost, $680,616,974)

$671,800,285

Common Stocks – 35.9%

Aerospace & Defense – 0.5%

General Dynamics Corp.

14,020

$5,206,327

Leidos Holdings, Inc.

22,831

3,201,135

$8,407,462

Alcoholic Beverages – 0.5%

Ambev S.A.

3,328,000

$9,653,451

Apparel, Footwear, & Accessories – 0.2%

Columbia Sportswear Co.

15,987

$917,654

Compagnie Financiere Richemont S.A.

3,633

863,587

LVMH Moet Hennessy Louis Vuitton SE

3,961

2,085,588

$3,866,829

21


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Auto & Auto Components – 0.3%

Compagnie Generale des Etablissements Michelin

105,365

$4,283,535

PT Astra International Tbk

6,861,200

1,859,089

$6,142,624

Brokerage & Asset Managers – 0.8%

Northern Trust Corp.

77,630

$14,405,023

Business Services – 0.2%

Cognizant Technology Solutions Corp., “A”

21,858

$1,411,590

Tata Consultancy Services Ltd.

68,380

1,718,741

Verisk Analytics, Inc., “A”

5,375

1,041,568

$4,171,899

Construction – 2.2%

American Homes 4 Rent LP, REIT

138,123

$4,599,496

Anhui Conch Cement Co. Ltd.

662,000

1,426,066

Compagnie de Saint-Gobain S.A.

30,935

2,814,237

Equity Lifestyle Properties, Inc., REIT

63,220

4,011,309

Equity Residential, REIT

135,478

8,825,037

Essex Property Trust, Inc., REIT

24,976

7,067,209

Meritage Homes Corp.

28,793

1,999,098

Mid-America Apartment Communities, Inc., REIT

46,809

6,031,340

Midea Group Co. Ltd., “A”

148,300

1,936,109

Techtronic Industries Co. Ltd.

48,500

835,746

$39,545,647

Consumer Products – 1.1%

Colgate-Palmolive Co.

129,893

$11,666,989

Kimberly-Clark Corp.

68,911

7,438,943

$19,105,932

Consumer Services – 0.0%

Localiza Rent a Car S.A.

99,700

$674,794

Containers – 0.1%

Smurfit Westrock PLC

25,488

$1,195,387

Diversified Financial Services – 0.1%

IG Group Holdings PLC

70,823

$1,336,793

Energy - Independent – 2.6%

Cenovus Energy, Inc.

44,734

$1,436,962

ConocoPhillips

28,814

3,817,567

Eni S.p.A.

325,091

8,800,188

ExxonMobil Holdings Corp.

12,166

1,958,118

PetroChina Co. Ltd.

4,502,000

5,859,988

Suncor Energy, Inc.

107,748

7,209,114

TotalEnergies SE

74,101

6,501,019

Valero Energy Corp.

15,068

5,408,207

Woodside Energy Group Ltd.

209,666

4,883,038

$45,874,201

22


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Engineering - Construction – 0.2%

Doosan Bobcat, Inc.

58,900

$2,670,206

Entertainment & Leisure – 0.8%

Brunswick Corp.

68,629

$5,208,941

Lamar Advertising Co., REIT

32,886

4,900,343

NetEase, Inc.

140,200

3,415,087

$13,524,371

Food & Beverages – 0.4%

Inner Mongolia Yili Industrial Group Co. Ltd., “A”

211,800

$835,242

Nomad Foods Ltd.

149,057

1,735,023

PepsiCo, Inc.

17,717

2,486,404

WH Group Ltd.

1,633,000

1,544,782

$6,601,451

Food & Drug Stores – 0.7%

Jeronimo Martins SGPS S.A.

110,668

$2,313,835

Tesco PLC

1,573,752

9,718,632

$12,032,467

Global Systemically Important Banks – 1.2%

BNP Paribas S.A.

68,701

$8,201,808

China Construction Bank Corp.

7,523,000

9,099,931

ING Groep N.V.

89,162

3,157,213

$20,458,952

Hardware, Peripherals, & Assembly – 0.9%

Hon Hai Precision Industry Co. Ltd.

876,000

$6,877,271

Lenovo Group Ltd.

746,000

2,858,963

Seagate Technology Holdings PLC

4,650

3,851,967

SK Square Co. Ltd.

4,145

3,107,031

$16,695,232

Health Maintenance Organizations – 0.7%

Cigna Group

43,684

$12,060,279

Insurance – 1.3%

American International Group, Inc.

37,945

$2,897,480

Hartford Insurance Group, Inc.

25,733

3,535,200

Lincoln National Corp.

76,262

3,247,999

Manulife Financial Corp.

41,771

1,771,866

MetLife, Inc.

60,761

5,782,624

Sompo Holdings, Inc.

107,700

4,606,692

Zurich Insurance Group AG

2,385

1,748,439

$23,590,300

Machinery & Tools – 0.4%

AGCO Corp.

17,023

$2,013,991

GEA Group AG

24,021

1,874,987

Wabtec Corp.

9,286

2,655,146

$6,544,124

23


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Media – 0.2%

Omnicom Group, Inc.

44,341

$3,881,168

Medical & Health Technology & Services – 1.4%

Healthcare Realty Trust, Inc., REIT

292,841

$5,575,693

Healthpeak Properties, Inc., REIT

351,562

7,319,521

Ventas, Inc., REIT

123,412

11,251,472

$24,146,686

Medical Equipment – 0.1%

Medtronic PLC

28,135

$2,550,438

Metals & Mining – 0.7%

Rio Tinto PLC

63,951

$6,567,533

Toyota Tsusho Corp.

134,800

6,310,074

$12,877,607

Network & Telecom – 0.3%

LM Ericsson Telephone Co., “B”

541,567

$5,469,020

Non-Global Systemically Important Banks – 0.8%

AIB Group PLC

172,826

$2,201,180

DBS Group Holdings Ltd.

27,340

1,664,791

Grupo Financiero Banorte S.A. de C.V.

232,688

2,634,852

M&T Bank Corp.

9,200

2,152,248

Popular, Inc.

20,640

3,471,442

Regions Financial Corp.

49,986

1,493,582

$13,618,095

Oil Services – 0.3%

Tenaris S.A.

162,863

$4,526,922

Pharmaceuticals & Biotechnology – 4.0%

AbbVie, Inc.

17,723

$4,544,532

Gilead Sciences, Inc.

105,910

15,498,869

Johnson & Johnson

85,461

22,719,807

Novartis AG

60,073

9,160,139

Pfizer, Inc.

541,358

15,407,049

Sanofi S.A.

39,768

3,548,047

$70,878,443

Real Estate – 2.8%

Acadia Realty Trust, REIT

232,363

$4,756,471

Essential Properties Realty Trust, REIT

195,344

5,860,320

Federal Realty Investment Trust, REIT

45,430

5,271,243

Janus Living, Inc., “A”, REIT

152,800

4,545,800

Kimco Realty Corp., REIT

121,353

2,877,280

NNN REIT, Inc.

121,096

5,473,539

Regency Centers Corp., REIT

71,802

5,368,635

Simon Property Group, Inc., REIT

70,295

14,925,034

$49,078,322

24


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Real Estate - Storage & Office – 3.8%

Americold Realty Trust, Inc., REIT

302,382

$4,520,611

BXP, Inc., REIT

134,910

9,172,531

Cousins Properties, Inc., REIT

230,120

6,671,179

Extra Space Storage, Inc., REIT

49,890

7,039,479

Highwoods Properties, Inc., REIT

241,558

7,391,675

Prologis, Inc., REIT

174,343

24,394,072

Rexford Industrial Realty, Inc., REIT

202,038

7,483,487

$66,673,034

Restaurants – 0.5%

Aramark

172,888

$9,735,323

Retail & E-commerce – 0.3%

Home Depot, Inc.

3,427

$1,123,473

Ross Stores, Inc.

13,425

3,068,150

Shimamura Co. Ltd. (l)

96,900

1,985,919

$6,177,542

Semiconductor & Electronic Components – 0.1%

NVIDIA Corp.

10,457

$2,308,696

Telecom - Infrastructure – 1.9%

Blackstone Digital Infrastructure Trust, Inc., REIT (a)

105,210

$2,110,513

Digital Realty Trust, Inc., REIT

74,445

13,816,247

Equinix, Inc., REIT

16,803

17,588,036

$33,514,796

Telecom Services – 0.6%

KDDI Corp.

410,000

$7,595,587

Koninklijke KPN N.V.

229,821

1,103,032

PT Telekom Indonesia

9,476,900

1,386,798

$10,085,417

Tobacco – 0.9%

Altria Group, Inc.

42,351

$2,900,196

British American Tobacco PLC

136,626

7,597,317

Imperial Brands PLC

63,999

2,186,566

Philip Morris International, Inc.

18,711

3,504,570

$16,188,649

Transportation & Logistics – 0.3%

Union Pacific Corp.

6,198

$1,863,553

Yangzijiang Shipbuilding Holdings Ltd.

725,900

2,758,773

$4,622,326

Travel, Gaming, & Lodging – 0.8%

Japan Airlines Co. Ltd.

204,100

$3,830,874

Ryman Hospitality Properties, Inc., REIT

25,851

3,276,873

VICI Properties, Inc., REIT

292,700

7,507,755

$14,615,502

25


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Utilities – 0.9%

Ameren Corp.

9,965

$1,056,390

Atmos Energy Corp.

33,689

5,596,753

CLP Holdings Ltd.

295,500

2,963,405

Edison International

83,807

4,523,902

Xcel Energy, Inc.

23,020

1,742,384

$15,882,834

Total Common Stocks (Identified Cost, $492,595,766)

$635,388,244

Convertible Preferred Stocks – 0.5%

Utilities – 0.5%

NextEra Energy, Inc., 7.234%

107,185

$5,133,090

PG&E Corp., 6%

97,379

3,299,200

Total Convertible Preferred Stocks (Identified Cost, $9,268,658)

$8,432,290

Preferred Stocks – 0.2%

Hardware, Peripherals, & Assembly – 0.2%

Samsung Electronics Co. Ltd. (Identified Cost, $1,482,424)

28,156

$3,836,836

Convertible Bonds – 0.1%

Utilities – 0.1%

PG&E Corp., 4.25%, 12/01/2027  (Identified Cost, $950,000)

$

950,000

$939,550

Mutual Funds (h) – 24.9%

Bond Funds – 24.0%

MFS High Yield Pooled Portfolio (v)

51,807,742

$425,859,642

Money Market Funds – 0.9%

MFS Institutional Money Market Portfolio, 3.75% (v)

15,847,117

$15,848,702

Total Mutual Funds (Identified Cost, $432,113,876)

$441,708,344

Underlying/Expiration Date/Exercise Price (Rate)

Counterparty

Notional

Amount

Par Amount/

Number of

Contracts

Purchased Options – 0.1%

Market Index Securities – 0.0%

Put - S&P 500 Index – 9/18/2026 @ $5,400

Goldman Sachs International

$80,747,625

105

$3,675

Put - S&P 500 Index – 12/18/2026 @ $5,500

Goldman Sachs International

130,734,250

170

249,900

$253,575

26


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Underlying/Expiration Date/Exercise Price (Rate)

Counterparty

Notional

Amount

Par Amount/

Number of

Contracts

Value ($)

Purchased Options – continued

Medical & Health Technology & Services – 0.1%

Call - Welltower, Inc. – 1/15/2027 @ $240

Merrill Lynch International

$19,418,928

822

$1,059,558

Call - Welltower, Inc. – 2/19/2027 @ $270

Morgan Stanley Capital Services LLC

8,929,872

378

170,100

$1,229,658

Total Purchased Options

(Premiums Paid, $4,297,939)

$1,483,233

Other Assets, Less Liabilities – 0.4%

7,426,068

Net Assets – 100.0%

$1,771,014,850

(a)

Non-income producing security.

(d)

In default.

(f)

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

(h)

An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under

common control. At period end, the aggregate values of the fund's investments in affiliated issuers and in unaffiliated issuers were $441,708,344 and

$1,321,880,438, respectively.

(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.

(l)

A portion of this security is on loan. See Note 2 for additional information.

(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

$240,766,801, representing 13.6% of net assets.

(p)

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

(v)

Affiliated issuer that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the

annualized seven-day yield of the fund at period end.

(z)

Restricted securities are not registered under the Securities Act of 1933 and are subject to legal restrictions on resale. These securities generally may be

resold in transactions exempt from registration or to the public if the securities are subsequently registered. Disposal of these securities may involve

time-consuming negotiations and prompt sale at an acceptable price may be difficult. The fund holds the following restricted securities:

Restricted Securities

Acquisition

Date

Cost

Value

Raizen Fuels Finance S.A., 6.25%, 7/08/2032

6/26/25

$1,500,394

$864,902

% of Net assets

0.0%

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

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.

ICE

Intercontinental Exchange

REIT

Real Estate Investment Trust

SOFR

Secured Overnight Financing Rate

TBA

To Be Announced

UMBS

Uniform Mortgage-Backed Security

Abbreviations indicate amounts shown in currencies other than the U.S. dollar. All amounts are stated in U.S. dollars unless otherwise indicated. A list of

abbreviations is shown below:

BRL

Brazilian Real

COP

Colombian Peso

CZK

Czech Koruna

EGP

Egypt Pound

EUR

Euro

HUF

Hungarian Forint

27


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

INR

Indian Rupee

MXN

Mexican Peso

NGN

Nigerian Naira

PEN

Peruvian Nuevo Sol

PHP

Philippine Peso

PYG

Paraguayan Guarani

RON

Romanian New Leu

TRY

Turkish Lira

UYU

Uruguayan Peso

ZAR

South African Rand

Derivative Contracts at 8/31/26

Forward Foreign Currency Exchange Contracts

Currency

Purchased

Currency

Sold

Counterparty

Settlement

Date

Unrealized

Appreciation

(Depreciation)

Asset Derivatives

CZK

18,388,265

USD

867,406

Citibank N.A.

10/16/2026

$16,909

EUR

346,808

USD

397,643

Barclays Bank PLC

10/16/2026

5,888

EUR

400,145

USD

458,075

HSBC Bank

10/16/2026

7,516

EUR

544,413

USD

624,443

JPMorgan Chase Bank N.A.

10/16/2026

9,013

EUR

429,231

USD

490,012

State Street Corp.

10/16/2026

9,423

EUR

705,269

USD

814,927

UBS AG

10/16/2026

5,694

HUF

10,107,743

USD

31,439

HSBC Bank

10/16/2026

647

HUF

183,940,428

USD

579,060

Merrill Lynch International

10/16/2026

4,835

HUF

87,621,603

USD

277,630

State Street Corp.

10/16/2026

513

INR

83,538,023

USD

873,527

JPMorgan Chase Bank N.A.

10/09/2026

1,816

MXN

12,480,064

USD

721,110

Deutsche Bank AG

10/16/2026

10,583

MXN

4,678,238

USD

273,313

State Street Corp.

10/16/2026

967

RON

2,550,518

USD

559,663

UBS AG

10/16/2026

2,430

TRY

21,014,861

USD

417,508

BNP Paribas

10/16/2026

3,085

TRY

33,942,218

USD

670,126

Citibank N.A.

10/16/2026

9,196

ZAR

711,947

USD

42,912

Deutsche Bank AG

10/16/2026

1,150

ZAR

9,688,234

USD

588,014

HSBC Bank

10/16/2026

11,593

ZAR

6,907,073

USD

427,297

State Street Corp.

10/16/2026

183

USD

715,441

PHP

43,971,000

JPMorgan Chase Bank N.A.

11/05/2026

10,269

$111,710

Liability Derivatives

BRL

3,706,203

USD

706,480

Barclays Bank PLC

11/24/2026

$(3,424

)

EUR

864,180

USD

1,011,450

BNP Paribas

10/16/2026

(5,927

)

EUR

612,043

USD

715,648

HSBC Bank

10/16/2026

(3,500

)

EUR

488,719

USD

571,546

NatWest Markets PLC

10/16/2026

(2,894

)

EUR

535,913

USD

626,030

State Street Corp.

10/16/2026

(2,464

)

USD

1,345,440

COP

4,417,752,653

Goldman Sachs International

10/30/2026

(8,848

)

USD

11,166,498

EUR

9,723,802

Deutsche Bank AG

10/16/2026

(147,704

)

USD

1,533,196

EUR

1,344,641

HSBC Bank

10/16/2026

(31,371

)

USD

1,015,477

EUR

885,247

JPMorgan Chase Bank N.A.

10/16/2026

(14,559

)

USD

282,415

EUR

246,720

State Street Corp.

10/16/2026

(4,658

)

USD

848,194

HUF

269,702,550

HSBC Bank

10/16/2026

(7,941

)

USD

892,299

HUF

283,831,408

Merrill Lynch International

10/16/2026

(8,686

)

USD

287,926

INR

27,971,942

JPMorgan Chase Bank N.A.

10/09/2026

(5,175

)

USD

399,607

PEN

1,366,312

Goldman Sachs International

10/22/2026

(5,759

)

USD

554,176

RON

2,550,518

Deutsche Bank AG

10/16/2026

(7,917

)

USD

420,304

ZAR

6,970,848

Deutsche Bank AG

10/16/2026

(11,124

)

USD

1,479,935

ZAR

24,481,579

State Street Corp.

10/16/2026

(35,235

)

$(307,186

)

28


MFS Diversified Income Fund

Portfolio of Investments (unaudited) – continued

Futures Contracts

Description

Long/

Short

Currency

Contracts

Notional

Amount

Expiration

Date

Value/Unrealized

Appreciation

(Depreciation)

Asset Derivatives

Interest Rate Futures

Euro-Bund 10 yr

Short

EUR

78

$11,167,467

September – 2026

$263,912

U.S. Treasury Bond 30 yr

Long

USD

3

325,875

December – 2026

762

U.S. Treasury Ultra Note 10 yr

Short

USD

82

8,972,594

December – 2026

21,721

$286,395

Liability Derivatives

Interest Rate Futures

U.S. Treasury Note 10 yr

Long

USD

87

$9,366,094

December – 2026

$(23,150

)

U.S. Treasury Note 2 yr

Long

USD

366

75,115,782

December – 2026

(144,858

)

U.S. Treasury Note 5 yr

Long

USD

293

30,971,016

December – 2026

(131,514

)

U.S. Treasury Ultra Bond 30 yr

Long

USD

18

1,980,562

December – 2026

(10,670

)

$(310,192

)

Cleared Swap Agreements

Maturity

Date

Notional

Amount

Counterparty

Cash Flows

to Receive/

Frequency

Cash Flows

to Pay/

Frequency

Unrealized

Appreciation

(Depreciation)

Net

Unamortized

Upfront

Payments

(Receipts)

Value

Liability Derivatives

Interest Rate Swaps

5/01/28

USD

19,850,000

centrally cleared

1-day SOFR / Annually

3.719% / Annually

$241,887

$—

$241,887

8/31/28

USD

31,625,000

centrally cleared

1-day SOFR / Annually

4.089% / Annually

74,401

—

74,401

1/09/29

USD

9,850,000

centrally cleared

1-day SOFR / Annually

3.35% / Annually

205,915

—

205,915

4/30/29

USD

9,960,000

centrally cleared

1-day SOFR / Annually

3.637% / Annually

144,321

—

144,321

1/14/31

USD

5,904,000

centrally cleared

1-day SOFR / Annually

3.511% / Annually

171,849

—

171,849

6/12/33

USD

4,785,000

centrally cleared

1-day SOFR / Annually

4.036% / Annually

61,858

—

61,858

$900,231

$—

$900,231

At August 31, 2026, the fund had liquid securities collateral with an aggregate value of $2,591,151 to cover any collateral or margin obligations for certain derivative contracts.

See Notes to Financial Statements

29


MFS Diversified Income Fund

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 $1,462,931 of securities on loan (identified cost, $1,189,211,761)

$1,321,880,438

Investments in affiliated issuers, at value (identified cost, $432,113,876)

441,708,344

Cash

754,368

Foreign currency, at value (identified cost, $47,379)

47,395

Receivables for

Net daily variation margin on open cleared swap agreements

109,107

Forward foreign currency exchange contracts

111,710

Net daily variation margin on open futures contracts

6,536

Investments sold

5,958,558

TBA sale commitments

445,696

Fund shares sold

321,711

Interest and dividends

10,118,749

Other assets

52,403

Total assets

$1,781,515,015

Liabilities

Payables for

Distributions

$586,944

Forward foreign currency exchange contracts

307,186

Investments purchased

4,721,575

TBA purchase commitments

1,326,566

Fund shares reacquired

2,865,260

Payable to affiliates

Investment adviser

9,500

Administrative services fee

2,738

Shareholder servicing costs

417,380

Distribution and service fees

34,441

Accrued expenses and other liabilities

228,575

Total liabilities

$10,500,165

Net assets

$1,771,014,850

Net assets consist of

Paid-in capital

$1,645,531,010

Total distributable earnings (loss)

125,483,840

Net assets

$1,771,014,850

Shares of beneficial interest outstanding

137,750,409

Net assets

Shares

outstanding

Net asset value

per share (a)

Class A

$1,041,659,495

81,010,021

$12.86

Class C

52,198,652

4,060,926

12.85

Class I

489,682,627

38,097,633

12.85

Class R1

209,124

16,279

12.85

Class R2

787,792

61,293

12.85

Class R3

1,985,631

154,300

12.87

Class R4

1,721,107

133,859

12.86

Class R6

182,770,422

14,216,098

12.86

(a)

Maximum offering price per share was equal to the net asset value per share for all share classes, except for Class A, for which the maximum

offering price per share was $13.43 [100 / 95.75 x $12.86]. On sales of $100,000 or more, the maximum offering price of Class A shares is

reduced. A contingent deferred sales charge may be imposed on redemptions of Class A and Class C shares. Redemption price per share was

equal to the net asset value per share for Classes I, R1, R2, R3, R4, and R6.

See Notes to Financial Statements

30


MFS Diversified Income Fund

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

$20,123,475

Dividends from affiliated issuers

17,091,823

Dividends from unaffiliated issuers

12,998,255

Other

28,088

Income on securities loaned

11,243

Foreign taxes withheld

(432,811

)

Total investment income

$49,820,073

Expenses

Management fee

$5,002,762

Distribution and service fees

1,630,209

Shareholder servicing costs

859,271

Administrative services fee

127,936

Independent Trustees' compensation

18,810

Custodian fee

130,184

Shareholder communications

51,168

Audit and tax fees

49,910

Legal fees

4,521

Miscellaneous

122,873

Total expenses

$7,997,644

Fees paid indirectly

(883

)

Reduction of expenses by investment adviser and distributor

(628,155

)

Net expenses

$7,368,606

Net investment income (loss)

$42,451,467

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers

$37,589,048

Affiliated issuers

(466,639

)

Futures contracts

(2,650,564

)

Swap agreements

211,095

Forward foreign currency exchange contracts

(76,993

)

Foreign currency

(85,134

)

Net realized gain (loss)

$34,520,813

Change in unrealized appreciation or depreciation

Unaffiliated issuers (includes $47,500 decrease in deferred foreign capital gains tax)

$(37,690,427

)

Affiliated issuers

(10,447,999

)

Futures contracts

(173,511

)

Swap agreements

1,027,672

Forward foreign currency exchange contracts

(23,065

)

Translation of assets and liabilities in foreign currencies

(46,277

)

Net unrealized gain (loss)

$(47,353,607

)

Net realized and unrealized gain (loss)

$(12,832,794

)

Change in net assets from operations

$29,618,673

See Notes to Financial Statements

31


MFS Diversified Income Fund

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)

$42,451,467

$83,744,143

Net realized gain (loss)

34,520,813

32,670,533

Net unrealized gain (loss)

(47,353,607

)

81,464,381

Change in net assets from operations

$29,618,673

$197,879,057

Total distributions to shareholders

$(43,834,857

)

$(106,781,199

)

Change in net assets from fund share transactions

$(92,265,240

)

$(227,526,942

)

Total change in net assets

$(106,481,424

)

$(136,429,084

)

Net assets

At beginning of period

1,877,496,274

2,013,925,358

At end of period

$1,771,014,850

$1,877,496,274

See Notes to Financial Statements

32


MFS Diversified Income Fund

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. 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 share class (assuming reinvestment of all distributions) held for the entire period. 

Class A 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$12.95

$12.33

$11.88

$11.48

$12.91

$13.14

Income (loss) from investment operations

Net investment income (loss) (d)

$0.30

$0.54

$0.52

$0.47

$0.41

$0.38

Net realized and unrealized gain (loss)

(0.08

)

0.77

0.48

0.36

(1.31

)

0.07

Total from investment operations

$0.22

$1.31

$1.00

$0.83

$(0.90

)

$0.45

Less distributions declared to shareholders

From net investment income

$(0.31

)

$(0.69

)

$(0.55

)

$(0.43

)

$(0.38

)

$(0.41

)

From net realized gain

—

—

—

—

(0.15

)

(0.27

)

Total distributions declared to shareholders

$(0.31

)

$(0.69

)

$(0.55

)

$(0.43

)

$(0.53

)

$(0.68

)

Net asset value, end of period (x)

$12.86

$12.95

$12.33

$11.88

$11.48

$12.91

Total return (%) (r)(s)(t)(x)

1.70

(n)

11.00

8.52

7.40

(6.96

)

3.22

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)(h)

0.96

(a)

0.95

0.96

0.95

0.97

0.99

Expenses after expense reductions (f)(h)

0.89

(a)

0.89

0.89

0.89

0.93

0.98

Net investment income (loss)

4.59

(a)

4.34

4.23

4.11

3.46

2.78

Portfolio turnover rate

22

(n)

43

48

60

62

72

Net assets at end of period (000 omitted)

$1,041,659

$1,100,504

$1,147,997

$1,220,302

$1,300,451

$1,563,027

See Notes to Financial Statements

33


MFS Diversified Income Fund

Financial Highlights - continued

Class C 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$12.94

$12.32

$11.87

$11.47

$12.91

$13.14

Income (loss) from investment operations

Net investment income (loss) (d)

$0.25

$0.45

$0.43

$0.39

$0.32

$0.28

Net realized and unrealized gain (loss)

(0.08

)

0.77

0.47

0.35

(1.32

)

0.06

Total from investment operations

$0.17

$1.22

$0.90

$0.74

$(1.00

)

$0.34

Less distributions declared to shareholders

From net investment income

$(0.26

)

$(0.60

)

$(0.45

)

$(0.34

)

$(0.29

)

$(0.30

)

From net realized gain

—

—

—

—

(0.15

)

(0.27

)

Total distributions declared to shareholders

$(0.26

)

$(0.60

)

$(0.45

)

$(0.34

)

$(0.44

)

$(0.57

)

Net asset value, end of period (x)

$12.85

$12.94

$12.32

$11.87

$11.47

$12.91

Total return (%) (r)(s)(t)(x)

1.32

(n)

10.18

7.71

6.61

(7.74

)

2.44

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)(h)

1.71

(a)

1.70

1.70

1.70

1.72

1.74

Expenses after expense reductions (f)(h)

1.64

(a)

1.64

1.64

1.64

1.69

1.73

Net investment income (loss)

3.84

(a)

3.62

3.51

3.40

2.71

2.05

Portfolio turnover rate

22

(n)

43

48

60

62

72

Net assets at end of period (000 omitted)

$52,199

$60,503

$87,071

$139,682

$220,775

$355,639

Class I 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$12.95

$12.32

$11.87

$11.47

$12.91

$13.14

Income (loss) from investment operations

Net investment income (loss) (d)

$0.31

$0.57

$0.55

$0.50

$0.44

$0.41

Net realized and unrealized gain (loss)

(0.09

)

0.78

0.48

0.36

(1.32

)

0.07

Total from investment operations

$0.22

$1.35

$1.03

$0.86

$(0.88

)

$0.48

Less distributions declared to shareholders

From net investment income

$(0.32

)

$(0.72

)

$(0.58

)

$(0.46

)

$(0.41

)

$(0.44

)

From net realized gain

—

—

—

—

(0.15

)

(0.27

)

Total distributions declared to shareholders

$(0.32

)

$(0.72

)

$(0.58

)

$(0.46

)

$(0.56

)

$(0.71

)

Net asset value, end of period (x)

$12.85

$12.95

$12.32

$11.87

$11.47

$12.91

Total return (%) (r)(s)(t)(x)

1.75

(n)

11.37

8.79

7.67

(6.81

)

3.47

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)(h)

0.71

(a)

0.70

0.71

0.70

0.72

0.74

Expenses after expense reductions (f)(h)

0.64

(a)

0.64

0.64

0.64

0.69

0.73

Net investment income (loss)

4.84

(a)

4.59

4.48

4.37

3.70

3.03

Portfolio turnover rate

22

(n)

43

48

60

62

72

Net assets at end of period (000 omitted)

$489,683

$514,348

$558,991

$664,290

$816,791

$1,145,617

See Notes to Financial Statements

34


MFS Diversified Income Fund

Financial Highlights - continued

Class R1 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$12.94

$12.32

$11.87

$11.46

$12.90

$13.13

Income (loss) from investment operations

Net investment income (loss) (d)

$0.25

$0.44

$0.42

$0.39

$0.32

$0.28

Net realized and unrealized gain (loss)

(0.08

)

0.78

0.48

0.36

(1.32

)

0.06

Total from investment operations

$0.17

$1.22

$0.90

$0.75

$(1.00

)

$0.34

Less distributions declared to shareholders

From net investment income

$(0.26

)

$(0.60

)

$(0.45

)

$(0.34

)

$(0.29

)

$(0.30

)

From net realized gain

—

—

—

—

(0.15

)

(0.27

)

Total distributions declared to shareholders

$(0.26

)

$(0.60

)

$(0.45

)

$(0.34

)

$(0.44

)

$(0.57

)

Net asset value, end of period (x)

$12.85

$12.94

$12.32

$11.87

$11.46

$12.90

Total return (%) (r)(s)(t)(x)

1.32

(n)

10.19

7.72

6.70

(7.75

)

2.44

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)(h)

1.71

(a)

1.70

1.70

1.70

1.72

1.74

Expenses after expense reductions (f)(h)

1.64

(a)

1.64

1.64

1.64

1.69

1.73

Net investment income (loss)

3.85

(a)

3.57

3.47

3.36

2.70

2.03

Portfolio turnover rate

22

(n)

43

48

60

62

72

Net assets at end of period (000 omitted)

$209

$215

$189

$178

$180

$225

Class R2 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$12.95

$12.32

$11.88

$11.47

$12.91

$13.14

Income (loss) from investment operations

Net investment income (loss) (d)

$0.28

$0.51

$0.49

$0.45

$0.38

$0.34

Net realized and unrealized gain (loss)

(0.09

)

0.78

0.47

0.36

(1.32

)

0.07

Total from investment operations

$0.19

$1.29

$0.96

$0.81

$(0.94

)

$0.41

Less distributions declared to shareholders

From net investment income

$(0.29

)

$(0.66

)

$(0.52

)

$(0.40

)

$(0.35

)

$(0.37

)

From net realized gain

—

—

—

—

(0.15

)

(0.27

)

Total distributions declared to shareholders

$(0.29

)

$(0.66

)

$(0.52

)

$(0.40

)

$(0.50

)

$(0.64

)

Net asset value, end of period (x)

$12.85

$12.95

$12.32

$11.88

$11.47

$12.91

Total return (%) (r)(s)(t)(x)

1.50

(n)

10.82

8.16

7.23

(7.28

)

2.96

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)(h)

1.21

(a)

1.20

1.21

1.20

1.22

1.24

Expenses after expense reductions (f)(h)

1.14

(a)

1.14

1.14

1.14

1.18

1.23

Net investment income (loss)

4.34

(a)

4.09

3.99

3.88

3.21

2.53

Portfolio turnover rate

22

(n)

43

48

60

62

72

Net assets at end of period (000 omitted)

$788

$855

$883

$997

$1,289

$1,647

See Notes to Financial Statements

35


MFS Diversified Income Fund

Financial Highlights - continued

Class R3 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$12.96

$12.33

$11.88

$11.48

$12.92

$13.15

Income (loss) from investment operations

Net investment income (loss) (d)

$0.30

$0.54

$0.52

$0.48

$0.41

$0.38

Net realized and unrealized gain (loss)

(0.08

)

0.78

0.48

0.35

(1.32

)

0.07

Total from investment operations

$0.22

$1.32

$1.00

$0.83

$(0.91

)

$0.45

Less distributions declared to shareholders

From net investment income

$(0.31

)

$(0.69

)

$(0.55

)

$(0.43

)

$(0.38

)

$(0.41

)

From net realized gain

—

—

—

—

(0.15

)

(0.27

)

Total distributions declared to shareholders

$(0.31

)

$(0.69

)

$(0.55

)

$(0.43

)

$(0.53

)

$(0.68

)

Net asset value, end of period (x)

$12.87

$12.96

$12.33

$11.88

$11.48

$12.92

Total return (%) (r)(s)(t)(x)

1.70

(n)

11.09

8.52

7.40

(7.04

)

3.21

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)(h)

0.96

(a)

0.95

0.96

0.95

0.97

0.99

Expenses after expense reductions (f)(h)

0.89

(a)

0.89

0.89

0.89

0.93

0.98

Net investment income (loss)

4.60

(a)

4.34

4.25

4.19

3.45

2.78

Portfolio turnover rate

22

(n)

43

48

60

62

72

Net assets at end of period (000 omitted)

$1,986

$7,410

$7,885

$10,443

$21,712

$22,253

Class R4 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$12.95

$12.33

$11.88

$11.48

$12.92

$13.15

Income (loss) from investment operations

Net investment income (loss) (d)

$0.32

$0.59

$0.55

$0.49

$0.44

$0.42

Net realized and unrealized gain (loss)

(0.09

)

0.75

0.48

0.37

(1.32

)

0.06

Total from investment operations

$0.23

$1.34

$1.03

$0.86

$(0.88

)

$0.48

Less distributions declared to shareholders

From net investment income

$(0.32

)

$(0.72

)

$(0.58

)

$(0.46

)

$(0.41

)

$(0.44

)

From net realized gain

—

—

—

—

(0.15

)

(0.27

)

Total distributions declared to shareholders

$(0.32

)

$(0.72

)

$(0.58

)

$(0.46

)

$(0.56

)

$(0.71

)

Net asset value, end of period (x)

$12.86

$12.95

$12.33

$11.88

$11.48

$12.92

Total return (%) (r)(s)(t)(x)

1.83

(n)

11.28

8.79

7.67

(6.80

)

3.47

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)(h)

0.71

(a)

0.70

0.71

0.69

0.72

0.74

Expenses after expense reductions (f)(h)

0.64

(a)

0.64

0.64

0.64

0.69

0.73

Net investment income (loss)

4.90

(a)

4.85

4.47

4.27

3.71

3.05

Portfolio turnover rate

22

(n)

43

48

60

62

72

Net assets at end of period (000 omitted)

$1,721

$2,706

$17,456

$16,613

$4,146

$5,995

See Notes to Financial Statements

36


MFS Diversified Income Fund

Financial Highlights - continued

Class R6 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$12.95

$12.33

$11.88

$11.48

$12.91

$13.14

Income (loss) from investment operations

Net investment income (loss) (d)

$0.32

$0.58

$0.56

$0.51

$0.45

$0.42

Net realized and unrealized gain (loss)

(0.08

)

0.77

0.48

0.36

(1.31

)

0.07

Total from investment operations

$0.24

$1.35

$1.04

$0.87

$(0.86

)

$0.49

Less distributions declared to shareholders

From net investment income

$(0.33

)

$(0.73

)

$(0.59

)

$(0.47

)

$(0.42

)

$(0.45

)

From net realized gain

—

—

—

—

(0.15

)

(0.27

)

Total distributions declared to shareholders

$(0.33

)

$(0.73

)

$(0.59

)

$(0.47

)

$(0.57

)

$(0.72

)

Net asset value, end of period (x)

$12.86

$12.95

$12.33

$11.88

$11.48

$12.91

Total return (%) (r)(s)(t)(x)

1.87

(n)

11.38

8.88

7.77

(6.64

)

3.57

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)(h)

0.62

(a)

0.61

0.62

0.61

0.63

0.65

Expenses after expense reductions (f)(h)

0.55

(a)

0.55

0.55

0.55

0.59

0.64

Net investment income (loss)

4.93

(a)

4.67

4.57

4.45

3.79

3.12

Portfolio turnover rate

22

(n)

43

48

60

62

72

Net assets at end of period (000 omitted)

$182,770

$190,956

$193,454

$209,338

$223,996

$260,384

(a)

Annualized.

(d)

Per share data is based on average shares outstanding.

(f)

Ratios do not reflect reductions from fees paid indirectly, if applicable. See Note 2 in the Notes to Financial Statements for additional information.

(h)

In addition to the fees and expenses which the fund bears directly, the fund indirectly bears a pro rata share of the fees and expenses of the underlying

affiliated funds in which the fund invests. Accordingly, the expense ratio for the fund reflects only those fees and expenses borne directly by the fund.

Because the underlying affiliated funds have varied expense and fee levels and the fund may own different proportions of the underlying affiliated funds

at different times, the amount of fees and expenses incurred indirectly by the fund will vary.

(n)

Not annualized.

(r)

Certain expenses have been reduced without which performance would have been lower.

(s)

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

(t)

Total returns do not include any applicable sales charges.

(x)

The net asset values and total returns 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

37


MFS Diversified Income Fund

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS Diversified Income Fund (the fund) is a diversified series of MFS Series Trust XIII (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 the MFS High Yield Pooled Portfolio (“High Yield Pooled Portfolio”). MFS does not receive a management fee from the High Yield Pooled Portfolio. The High Yield Pooled Portfolio’s investment objective is to seek total return with an emphasis on high current income, but also considering capital appreciation. The accounting policies of the High Yield Pooled Portfolio are outlined in its financial statements, which is available without charge by calling 1-800-225-2606 and on the Securities and Exchange Commission (SEC) web site at http://www.sec.gov. The accounting policies detailed in the Significant Accounting Policies note cover both the fund and the High Yield Pooled Portfolio. For purposes of this policy disclosure, “fund” refers to both the fund and the High Yield Pooled Portfolio in which the fund invests. The High Yield Pooled Portfolio’s financial statements are not covered by this report. The fund and the High Yield Pooled Portfolio invest in high-yield securities rated below investment grade. Investments in below investment grade quality securities can involve a substantially greater risk of default or can already be in default, and their values can decline significantly. Below investment grade quality securities tend to be more sensitive to adverse news about the issuer, or the market or economy in general, than higher quality debt instruments. The fund and the High Yield Pooled Portfolio invest 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. The fund invests a significant amount of its net assets in U.S. and foreign real estate related investments and as a result is subject to certain risks associated with the direct ownership of real estate and the real estate industry in general. These include risks related to general, regional and local economic conditions; difficulties in valuing and disposing of real estate; fluctuations in interest rates and property tax rates, shifts in zoning laws, environmental regulations and other governmental action; cash flow dependency; increased operating expenses; lack of availability of mortgage funds; losses due to natural disasters; overbuilding; losses due to casualty or condemnation; changes in property values and rental rates; the management skill and creditworthiness of the manager; and other factors. The fund invests in emerging market issuers. 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

38


MFS Diversified Income Fund

Notes to Financial Statements (unaudited) - continued 

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 — The investments of the fund and the High Yield Pooled Portfolio are valued as described below.

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. 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. Exchange-traded options are generally valued at the last sale or official closing price on their primary exchange as provided by a third-party pricing service. Exchange-traded options for which there were no sales reported that day are generally valued at the last daily bid quotation on their primary exchange as provided by a third-party pricing service. For put options, the position may be valued at the last daily ask quotation if there are no trades reported during the day. Options not traded on an exchange are generally valued at a broker/dealer bid quotation. Foreign currency options are generally valued at valuations provided by a third-party pricing service. 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. Forward foreign currency exchange contracts are generally valued at the mean of bid and asked prices for the time period interpolated from rates provided by a third-party pricing service for proximate time periods. Swap agreements are generally valued using valuations provided by a third-party pricing service, which for cleared swaps includes an evaluation of any trading activity at the clearinghouses. 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. 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. Events that occur after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund’s net asset value may be deemed to have a material effect on the value of securities traded in foreign markets. Accordingly, the fund’s foreign equity securities may often be valued at fair value. 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

39


MFS Diversified Income Fund

Notes to Financial Statements (unaudited) - continued 

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, forward foreign currency exchange contracts, and swap agreements. 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:

United States

$440,614,652

$—

$—

$440,614,652

United Kingdom

1,735,023

27,406,841

—

29,141,864

France

27,434,234

—

—

27,434,234

China

5,630,314

19,801,072

—

25,431,386

Japan

15,891,580

8,437,566

—

24,329,146

Italy

13,327,110

—

—

13,327,110

Switzerland

11,772,165

—

—

11,772,165

Canada

10,417,942

—

—

10,417,942

Brazil

10,328,245

—

—

10,328,245

Other Countries

27,659,617

27,201,009

—

54,860,626

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

Agencies & Equivalents

—

67,228,646

—

67,228,646

Non - U.S. Sovereign Debt

—

226,910,080

—

226,910,080

Municipal Bonds

—

1,502,999

—

1,502,999

U.S. Corporate Bonds

—

149,056,613

—

149,056,613

Residential Mortgage-Backed Securities

—

111,650,543

—

111,650,543

Commercial Mortgage-Backed Securities

—

6,970,523

—

6,970,523

Asset-Backed Securities (including CDOs)

—

8,950,277

—

8,950,277

Foreign Bonds

—

100,470,154

—

100,470,154

Purchased Options

253,575

1,229,658

—

1,483,233

Investment Companies

441,708,344

—

—

441,708,344

Total

$1,006,772,801

$756,815,981

$—

$1,763,588,782

Other Financial Instruments

Futures Contracts – Assets

$286,395

$—

$—

$286,395

Futures Contracts – Liabilities

(310,192

)

—

—

(310,192

)

Forward Foreign Currency Exchange

Contracts – Assets

—

111,710

—

111,710

Forward Foreign Currency Exchange

Contracts – Liabilities

—

(307,186

)

—

(307,186

)

Swap Agreements – Liabilities

—

900,231

—

900,231

For further information regarding security characteristics, see the Portfolio of Investments. Please refer to the High Yield Pooled Portfolio's financial statements for further information regarding the levels used in valuing its assets and liabilities.

The following is a reconciliation of level 3 assets for which significant unobservable inputs were used to determine fair value. The table presents the activity of level 3 securities held at the beginning and the end of the period. 

40


MFS Diversified Income Fund

Notes to Financial Statements (unaudited) - continued 

Equity

Securities

Balance as of 2/28/26

$0

Realized gain (loss)

(4,704,768)

Change in unrealized appreciation or depreciation

6,264,489

Sales

(1,559,721)

Balance as of 8/31/26

$—

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.

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 purchased options, futures contracts, forward foreign currency exchange contracts, and swap agreements. 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.

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

Equity

Purchased Option Contracts

$1,483,233

$—

Interest Rate

Futures Contracts

286,395

(310,192)

Foreign Exchange

Forward Foreign Currency Exchange Contracts

111,710

(307,186)

Interest Rate

Cleared Swap Agreements

900,231

—

Total

$2,781,569

$(617,378)

(a) The value of purchased options outstanding is included in investments in unaffiliated issuers, at value, within the Statement of Assets and Liabilities. Values presented in this table for futures contracts and cleared swap agreements correspond to the values reported in the Portfolio of Investments. Only the current day net variation margin for futures contracts and cleared swap agreements 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

Swap

Agreements

Forward Foreign

Currency

Exchange

Contracts

Unaffiliated Issuers

(Purchased

Options)

Interest Rate

$(2,650,564

)

$211,095

$—

$—

Foreign Exchange

—

—

(76,993

)

—

Equity

—

—

—

756,795

Credit

—

—

—

(1,467

)

Total

$(2,650,564

)

$211,095

$(76,993

)

$755,328

41


MFS Diversified Income Fund

Notes to Financial Statements (unaudited) - continued 

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

Swap

Agreements

Forward Foreign

Currency

Exchange

Contracts

Unaffiliated Issuers

(Purchased

Options)

Interest Rate

$(173,511

)

$1,027,672

$—

$—

Foreign Exchange

—

—

(23,065

)

—

Equity

—

—

—

(2,989,659

)

Credit

—

—

—

9,546

Total

$(173,511

)

$1,027,672

$(23,065

)

$(2,980,113

)

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.

Purchased Options — The fund purchased call and put options for a premium. Purchased call and put options entitle the holder to buy and sell a specified number of shares or units of a particular security, currency or index at a specified price at a specified date or within a specified period of time. Purchasing call options may hedge against an anticipated increase in the dollar cost of securities or currency to be acquired or increase the fund’s exposure to an underlying instrument. Purchasing put options may hedge against an anticipated decline in the value of portfolio securities or currency or decrease the fund's exposure to an underlying instrument.

A purchased swaption represents an option that gives the fund as purchaser the right, but not the obligation, to enter into a pre-defined interest rate or credit default swap agreement with the counterparty at a specified rate at a specified date or within a specified period of time. The fund enters into swaptions primarily to preserve a return or spread on a particular investment or portion of the fund’s investments, to adjust the fund’s sensitivity to underlying risk factors or to protect against an increase or decrease in the price of securities.

The premium paid is initially recorded as an investment in the Statement of Assets and Liabilities. That investment is subsequently marked-to-market daily with the difference between the premium paid and the market value of the purchased option being recorded as unrealized appreciation or depreciation. Premiums paid for purchased call and put options which have expired are treated as realized losses on investments in the Statement of Operations. Upon the exercise or closing of a purchased call option, the premium paid is added to the cost of the security or financial instrument purchased.  Upon the exercise or closing of a purchased put option, the premium paid is offset against the proceeds on the sale of the underlying security or financial instrument in order to determine the realized gain or loss on investments.

42


MFS Diversified Income Fund

Notes to Financial Statements (unaudited) - continued 

Whether or not the option is exercised, the fund's maximum risk of loss from purchasing an option is the amount of premium paid.  All option contracts involve credit risk if the counterparty to the option contract fails to perform. For uncleared options, this risk is mitigated in cases where there is an ISDA Master Agreement between the fund and the counterparty providing for netting as described above and, where applicable, by the posting of collateral by the counterparty to the fund to cover the fund’s exposure to the counterparty under such ISDA Master Agreement.

Futures Contracts — The fund entered into futures contracts which may be used to hedge against or obtain broad market exposure, interest rate exposure, currency 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, exchange 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.

Forward Foreign Currency Exchange Contracts — The fund entered into forward foreign currency exchange contracts for the purchase or sale of a specific foreign currency at a fixed price on a future date. These contracts may be used to hedge the fund’s currency risk or for non-hedging purposes. For hedging purposes, the fund may enter into contracts to deliver or receive foreign currency that the fund will receive from or use in its normal investment activities. The fund may also use contracts to hedge against declines in the value of foreign currency denominated securities due to unfavorable exchange rate movements. For non-hedging purposes, the fund may enter into contracts with the intent of changing the relative exposure of the fund’s portfolio of securities to different currencies to take advantage of anticipated exchange rate changes.

Forward foreign currency exchange contracts are adjusted by the daily exchange rate of the underlying currency and any unrealized gains or losses are recorded as a receivable or payable for forward foreign currency exchange contracts until the contract settlement date. On contract settlement date, any gain or loss on the contract is recorded as realized gains or losses on forward foreign currency exchange contracts.

Risks may arise upon entering into these contracts from unanticipated movements in the value of the contract and from the potential inability of counterparties to meet the terms of their contracts. Generally, the fund’s maximum risk due to counterparty credit risk is the unrealized gain on the contract due to the use of Continuous Linked Settlement, a multicurrency cash settlement system for the centralized settlement of foreign transactions. This risk is mitigated in cases where there is an ISDA Master Agreement between the fund and the counterparty providing for netting as described above and, where applicable, by the posting of collateral by the counterparty to the fund to cover the fund’s exposure to the counterparty under such ISDA Master Agreement.

Swap Agreements — The fund entered into swap agreements which generally involve a periodic exchange of cash payments on a net basis, at specified intervals or upon the occurrence of specified events, between the fund and a counterparty. Certain swap agreements may be entered into as a bilateral contract (“uncleared swaps”) while others are required to be centrally cleared (“cleared swaps”). 

Both cleared and uncleared swap agreements are marked to market daily.  The value of uncleared swap agreements is reported in the Statement of Assets and Liabilities as “Uncleared swaps, at value” which includes any related interest accruals to be paid or received by the fund.  For cleared swaps, payments (variation margin) are made or received by the fund each day, depending on the daily fluctuations in the value of the cleared swap, such that only the current day net receivable or payable for variation margin is reported in the Statement of Assets and Liabilities.

For both cleared and uncleared swaps, premiums paid or received at the inception of the agreements are amortized over the term of the agreement as realized gain or loss on swap agreements in the Statement of Operations. The periodic exchange of net cash payments, as well as any liquidation payment received or made upon early termination, are recorded as a realized gain or loss on swap agreements in the Statement of Operations. The change in unrealized appreciation or depreciation on swap agreements in the Statement of Operations reflects the aggregate change over the reporting period in the value of swaps net of any unamortized premiums paid or received.

43


MFS Diversified Income Fund

Notes to Financial Statements (unaudited) - continued 

Risks related to swap agreements include the possible lack of a liquid market, unfavorable market and interest rate movements of the underlying instrument and the failure of the counterparty to perform under the terms of the agreements. The fund's maximum risk of loss from counterparty credit risk is the discounted net value of the cash flows to be received from/paid to the counterparty over the contract's remaining life, to the extent that the amount is positive. To address counterparty risk, uncleared swap agreements are limited to only highly-rated counterparties.  Risk is further reduced by having an ISDA Master Agreement (“ISDA”) between the fund and the counterparty and, where applicable, by the posting of collateral by the counterparty to the fund to cover the fund’s exposure to the counterparty under such ISDA. The fund's counterparty risk due to cleared swaps is mitigated by the fact that the clearinghouse is the counterparty to the transaction and the regulatory requirement safeguards in the event of a clearing broker bankruptcy.

The fund entered into interest rate swap agreements in order to manage its exposure to interest rate fluctuations.  Interest rate swap agreements involve the periodic exchange of cash flows, between the fund and a counterparty, based on the difference between two interest rates applied to a notional principal amount. The two interest rates exchanged may either be a fixed rate and a floating rate or two floating rates based on different indices.

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.

Security Loans — Under its Securities Lending Agency Agreement with the fund, JPMorgan Chase and Co., 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 three business days. The loans are collateralized by cash and/or U.S. Treasury and federal agency obligations 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, when such purchase is commercially impracticable, 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, 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 $1,462,931. The fair value of the fund's investment securities on loan is presented gross in the Statement of Assets and Liabilities. These loans were collateralized by U.S. Treasury Obligations of $1,543,606 held by the custodian or a triparty custodian. The collateral on securities loaned exceeded the value of securities on loan at period end. 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. Treasury and/or federal agency obligations, 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. All premium and discount is amortized or accreted for financial statement purposes in accordance with U.S. generally accepted accounting principles. 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. Distributions from REITs may be characterized as ordinary income, net capital gain, or a return of capital to the fund. The proper characterization of REIT distributions is generally not known until after the end of each calendar year. As such, estimates are used in reporting the character of income and distributions for financial statement purposes. The fund receives substantial distributions from

44


MFS Diversified Income Fund

Notes to Financial Statements (unaudited) - continued 

holdings in REITs. Debt obligations may be placed on non-accrual status or set to accrue at a rate of interest less than the contractual coupon when the collection of all or a portion of interest has become doubtful. Interest income for those debt obligations may be further reduced by the write-off of the related interest receivables when deemed uncollectible.

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.

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.

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.

Fees Paid Indirectly — The fund's custody fee may be reduced by a credit earned under an arrangement that measures the value of U.S. dollars deposited with the custodian by the fund. The amount of the credit, for the six months ended August 31, 2026, is shown as a reduction of total expenses in the Statement of Operations.

45


MFS Diversified Income Fund

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, passive foreign investment companies, wash sale loss deferrals, straddle loss deferrals, and derivative transactions.

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)

$106,781,199

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

As of 8/31/26

Cost of investments

$1,651,317,610

Gross appreciation

150,704,073

Gross depreciation

(38,432,901

)

Net unrealized appreciation (depreciation)

$112,271,172

As of 2/28/26

Undistributed ordinary income

10,022,479

Capital loss carryforwards

(22,974,268

)

Other temporary differences

(8,400,661

)

Net unrealized appreciation (depreciation)

161,052,474

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

$(22,974,268

)

Multiple Classes of Shares of Beneficial Interest — The fund offers multiple classes of shares, which differ in their respective distribution and service fees. The fund's income and common expenses are allocated to shareholders based on the value of settled shares outstanding of each class. The fund's realized and unrealized gain (loss) are allocated to shareholders based on the daily net assets of each class. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class C shares will convert to Class A shares approximately eight years after purchase. The fund’s distributions declared to shareholders as reported in the Statements of Changes in Net Assets are presented by class as follows: 

46


MFS Diversified Income Fund

Notes to Financial Statements (unaudited) - continued 

Six months

ended

8/31/26

Year

ended

2/28/26

Class A

$25,357,115

$61,035,181

Class C

1,132,179

3,384,226

Class I

12,398,898

30,424,798

Class R1

4,094

9,472

Class R2

18,150

44,245

Class R3

135,673

439,674

Class R4

52,091

361,126

Class R6

4,736,657

11,082,477

Total

$43,834,857

$106,781,199

(3) Transactions with Affiliates

Investment Adviser — The fund has an investment advisory 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 the following annual rates based on the fund's average daily net assets: 

Up to $5 billion

0.55%

In excess of $5 billion

0.50%

MFS has agreed in writing to reduce its management fee by a specified amount if certain MFS mutual fund assets exceed thresholds agreed to by MFS and the fund's Board of Trustees. MFS has also agreed in writing to waive at least 0.01% of its management fee as part of this agreement. The agreement to waive at least 0.01% of the management fee will continue until modified by the fund's Board of Trustees, but such agreement will continue at least until June 30, 2027. For the six months ended August 31, 2026, this management fee reduction amounted to $125,909, which is included in the reduction of total expenses in the Statement of Operations. The management fee incurred for the six months ended August 31, 2026 was equivalent to an annual effective rate of 0.54% of the fund's average daily net assets.

The investment adviser has agreed in writing to pay a portion of the fund’s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses (such as fees and expenses associated with investments in investment companies and other similar investment vehicles), such that total fund operating expenses do not exceed the following rates annually of each class’s average daily net assets: 

Classes

A

C

I

R1

R2

R3

R4

R6

0.89%

1.64%

0.64%

1.64%

1.14%

0.89%

0.64%

0.55%

This written agreement will continue until modified by the fund’s Board of Trustees, but such agreement will continue at least until June 30, 2028. For the six months ended August 31, 2026, this reduction amounted to $502,198, which is included in the reduction of total expenses in the Statement of Operations.

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $5,821 for the six months ended August 31, 2026, as its portion of the initial sales charge on sales of Class A shares of the fund.

The Board of Trustees has adopted a distribution plan for certain share classes pursuant to Rule 12b-1 of the Investment Company Act of 1940.

The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. The distribution and service fees are computed daily and paid monthly.

47


MFS Diversified Income Fund

Notes to Financial Statements (unaudited) - continued 

Distribution Plan Fee Table: 

Distribution

Fee Rate (d)

Service

Fee Rate (d)

Total

Distribution

Plan (d)

Annual

Effective

Rate (e)

Distribution

and Service

Fee

Class A

—

0.25%

0.25%

0.25%

$1,337,447

Class C

0.75%

0.25%

1.00%

1.00%

282,753

Class R1

0.75%

0.25%

1.00%

1.00%

1,027

Class R2

0.25%

0.25%

0.50%

0.50%

2,018

Class R3

—

0.25%

0.25%

0.25%

6,964

Total Distribution and Service Fees

$1,630,209

(d)

 In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees equal to these annual percentage rates of each

class’s average daily net assets. The distribution and service fee rates disclosed by class represent the current rates in effect at the end of the reporting

period. Any rate changes, if applicable, are detailed below.

(e)

 The annual effective rates represent actual fees incurred under the distribution plan for the six months ended August 31, 2026 based on each class's average daily net assets.  MFD has voluntarily agreed to rebate a portion of each class's 0.25% service fee attributable to accounts for which there is no financial intermediary specified on the account except for accounts attributable to MFS or its affiliates' seed money. For the six months ended August 31, 2026, this rebate amounted to $22 and $26 for Class A and Class R3 shares, respectively, and is included in the reduction of total expenses in the Statement of Operations.

Certain Class A shares are subject to a contingent deferred sales charge (CDSC) in the event of a shareholder redemption within 18 months of purchase. Class C shares are subject to a CDSC in the event of a shareholder redemption within 12 months of purchase. All contingent deferred sales charges are paid to MFD and during the six months ended August 31, 2026, were as follows: 

Amount

Class A

$2,374

Class C

383

Shareholder Servicing Agent — MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average daily net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the six months ended August 31, 2026, the fee was $101,455, which equated to 0.0112% annually of the fund's average daily net assets. MFSC also receives reimbursement from the fund for out-of-pocket expenses, sub-accounting and other shareholder servicing costs which may be paid to affiliated and unaffiliated service providers. Class R6 shares do not incur sub-accounting fees. For the six months ended August 31, 2026, these out-of-pocket expenses, sub-accounting and other shareholder servicing costs amounted to $757,816.

Administrator — MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund. Under an administrative services agreement, the fund reimburses MFS the costs incurred to provide these services. The fund is charged an annual fixed amount of $17,500 plus a fee based on average daily net assets. The administrative services fee is computed daily and paid monthly. The administrative services fee incurred for the six months ended August 31, 2026 was equivalent to an annual effective rate of 0.0141% of the fund's average daily net assets.

Trustees’ and Officers’ Compensation — The fund pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. Independent Trustees’ compensation is accrued daily and paid subsequent to each Trustee Board meeting. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration from MFS for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC.

Other — The fund invests in the MFS Institutional Money Market Portfolio which is managed by MFS and seeks current income consistent with preservation of capital and liquidity. This money market fund does not pay a management fee to MFS but does incur investment and operating costs.

The fund invests in the MFS High Yield Pooled Portfolio, which is a mutual fund advised by MFS that does not pay management fees to MFS and does not pay distribution and/or service fees to MFD, but does incur investment and operating costs. The fund invests in MFS High Yield Pooled Portfolio to gain exposure to high income debt instruments, rather than investing in high income debt instruments directly. Income earned on this investment is included in “Dividends from affiliated issuers” in the Statement of Operations.

48


MFS Diversified Income Fund

Notes to Financial Statements (unaudited) - continued 

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 $15,668, 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 purchased options with an expiration date of less than one year from the time of purchase, were as follows: 

Purchases

Sales

U.S. Government securities

$106,204,383

$120,091,056

Non-U.S. Government securities

291,816,439

395,840,009

(5) Shares of Beneficial Interest

The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows: 

Six months ended

8/31/26

Year ended

2/28/26

Shares

Amount

Shares

Amount

Shares sold

Class A

2,158,902

$27,631,952

5,270,398

$65,287,466

Class C

116,527

1,485,342

210,600

2,613,608

Class I

2,349,729

30,107,838

5,680,554

69,977,514

Class R1

458

5,877

874

10,825

Class R2

2,520

32,231

5,480

67,455

Class R3

70,733

894,174

88,628

1,097,347

Class R4

68,252

873,762

60,508

741,377

Class R6

1,090,874

13,957,933

2,296,527

28,546,192

5,857,995

$74,989,109

13,613,569

$168,341,784

Shares issued to shareholders

in reinvestment of distributions

Class A

1,889,795

$24,153,812

4,672,937

$58,135,234

Class C

85,455

1,091,642

262,139

3,255,933

Class I

786,496

10,047,190

2,005,660

24,934,099

Class R1

320

4,085

761

9,466

Class R2

1,421

18,145

3,506

43,590

Class R3

9,052

115,411

35,263

438,921

Class R4

4,041

51,511

29,354

361,075

Class R6

358,391

4,580,952

862,318

10,728,164

3,134,971

$40,062,748

7,871,938

$97,906,482

Shares reacquired

Class A

(7,993,850

)

$(102,319,201

)

(18,098,120

)

$(224,150,180

)

Class C

(815,828

)

(10,431,147

)

(2,865,355

)

(35,378,295

)

Class I

(4,763,606

)

(60,879,865

)

(13,320,438

)

(164,958,467

)

Class R1

(1,106

)

(14,115

)

(336

)

(4,094

)

Class R2

(8,649

)

(110,766

)

(14,658

)

(179,707

)

Class R3

(497,304

)

(6,409,200

)

(191,343

)

(2,389,228

)

Class R4

(147,404

)

(1,861,150

)

(1,296,524

)

(15,778,466

)

Class R6

(1,976,433

)

(25,291,653

)

(4,107,773

)

(50,936,771

)

(16,204,180

)

$(207,317,097

)

(39,894,547

)

$(493,775,208

)

49


MFS Diversified Income Fund

Notes to Financial Statements (unaudited) - continued 

Six months ended

8/31/26

Year ended

2/28/26

Shares

Amount

Shares

Amount

Net change

Class A

(3,945,153

)

$(50,533,437

)

(8,154,785

)

$(100,727,480

)

Class C

(613,846

)

(7,854,163

)

(2,392,616

)

(29,508,754

)

Class I

(1,627,381

)

(20,724,837

)

(5,634,224

)

(70,046,854

)

Class R1

(328

)

(4,153

)

1,299

16,197

Class R2

(4,708

)

(60,390

)

(5,672

)

(68,662

)

Class R3

(417,519

)

(5,399,615

)

(67,452

)

(852,960

)

Class R4

(75,111

)

(935,877

)

(1,206,662

)

(14,676,014

)

Class R6

(527,168

)

(6,752,768

)

(948,928

)

(11,662,415

)

(7,211,214

)

$(92,265,240

)

(18,409,040

)

$(227,526,942

)

Effective September 29, 2023, purchases of the fund's Class R1 and Class R2 shares were closed to new eligible investors.

(6) Line of Credit

The fund and certain other funds managed by MFS participate in a $1.45 billion unsecured committed line of credit of which $1.2 billion is reserved for use by the fund and certain other MFS U.S. funds. The line of credit is provided by a syndicate of banks under a credit agreement. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the highest of 1) Daily Simple SOFR (Secured Overnight Financing Rate), 2) the Federal Funds Effective Rate, or 3) the Overnight Bank Funding Rate, each plus an agreed upon spread. A commitment fee, based on the average daily unused portion of the committed line of credit, is allocated among the participating funds. The line of credit expires on March 11, 2027 unless extended or renewed. In addition, the fund and other funds managed by MFS have established unsecured uncommitted borrowing arrangements with certain banks for temporary financing needs. Interest is charged to each fund, based on its borrowings, at rates equal to customary reference rates plus an agreed upon spread. For the six months ended August 31, 2026, the fund’s commitment fee and interest expense were $4,257 and $0, respectively, and are included in “Miscellaneous” expense in the Statement of Operations.

(7) Investments in Affiliated Issuers

An affiliated issuer may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. The following were affiliated issuers for the six months ended August 31, 2026: 

Affiliated Issuers

Beginning

Value

Purchases

Sales

Proceeds

Realized

Gain

(Loss)

Change in

Unrealized

Appreciation

or

Depreciation

Ending

Value

MFS High Yield Pooled Portfolio

$412,340,130

$56,156,616

$31,719,221

$(469,858

)

$(10,448,025

)

$425,859,642

MFS Institutional Money Market

Portfolio

15,461,052

194,543,405

194,159,000

3,219

26

15,848,702

$427,801,182

$250,700,021

$225,878,221

$(466,639

)

$(10,447,999

)

$441,708,344

Affiliated Issuers

Dividend

Income

Capital Gain

Distributions

MFS High Yield Pooled Portfolio

$16,826,336

$—

MFS Institutional Money Market Portfolio

265,487

—

$17,091,823

$—

(8) Russia and Ukraine Conflict

The fund invests in securities and/or derivative instruments that are economically tied to Russia and/or Ukraine. Escalation of the conflict between Russia and Ukraine in late February 2022 caused market volatility and disruption in the tradability of Russian securities, including closure of the local securities market, temporary restriction on securities sales by non-residents, and disruptions to clearance and payment systems. To the extent that the fund is unable to sell securities, whether due to market constraints or to

50


MFS Diversified Income Fund

Notes to Financial Statements (unaudited) - continued 

the sanctions imposed on Russia by the United States and other countries, those securities are considered illiquid and the value of those securities reflects their illiquid classification. Additionally, since there is no assurance on collectability of dividends declared by certain Russian issuers, all such dividends, related receivables, and/or currency denominated in Rubles, if applicable, have been valued at $0. Management continues to monitor these events and to evaluate the related impacts on fund performance.

(9) Subsequent Event

On September 23, 2026, the Board of Trustees of the High Yield Pooled Portfolio approved the liquidation of the High Yield Pooled Portfolio and the distribution of the High Yield Pooled Portfolio’s assets on or around October 30, 2026.  The fund is the sole shareholder of the High Yield Pooled Portfolio.  It is anticipated that the fund will receive the High Yield Pooled Portfolio’s assets through an in-kind transfer of portfolio securities, where possible, and cash on this date.

51


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

There is nothing to report for this item for MFS Diversified Income Fund.

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

There is nothing to report for this item for MFS Diversified Income Fund.

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 Diversified Income Fund. 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.

52


MFS Diversified Income Fund

Board Review of Investment Advisory Agreement

MFS Diversified Income Fund

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 advisory 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 advisory 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 advisory 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 advisory 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 advisory 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 advisory agreement and other arrangements with the Fund.

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 various time periods 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 advisory fees and other expenses 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 and other clients, (iv) information as to whether and to what extent applicable expense waivers, reimbursements or fee “breakpoints” are observed for the Fund, (v) 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, (vi) MFS’ views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vii) descriptions of various functions performed by MFS for the Funds, such as compliance monitoring and portfolio trading practices, and (viii) 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 advisory 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 various time periods.  The Trustees placed particular emphasis on the total return performance of the Fund’s Class I shares in comparison to the performance of funds in its Broadridge performance universe over the five-year period ended December 31, 2025, which the Trustees believed was a long enough period to reflect differing market conditions.  The total return performance of the Fund’s Class I shares was in the 4th quintile relative to the other funds in the universe for this five-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers).  The total return performance of the Fund’s Class I shares was in the 5th quintile for each of the one- and three-year periods ended December 31, 2025 relative to the Broadridge performance universe.  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.

The Trustees expressed continued concern to MFS about the substandard investment performance of the Fund. 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, as to MFS’ efforts to improve the Fund’s performance. In addition, the Trustees requested that they receive a separate update on the Fund’s performance at each of their regular meetings. After reviewing these and related factors, the Trustees concluded, within the context

53


MFS Diversified Income Fund

Board Review of Investment Advisory Agreement - continued

of their overall conclusions regarding the investment advisory agreement, that MFS’s responses and efforts and plans to improve investment performance were sufficient to support approval of the continuance of the investment advisory agreement for an additional one-year period, but that they would continue to closely monitor the performance of the Fund.

In assessing the reasonableness of the Fund’s advisory fee, the Trustees considered, among other information, the Fund’s advisory fee and the total expense ratio of the Fund’s Class I shares as a percentage of average daily net assets and the advisory fee and total expense ratios of the Broadridge expense group based on information provided by Broadridge.  The Trustees considered that MFS currently observes an expense limitation for the Fund, which may not be changed without the Trustees’ approval.  The Trustees also considered that, according to the data provided by Broadridge (which takes into account any fee reductions or expense limitations that were in effect during the Fund’s last fiscal year), the Fund’s effective advisory fee rate and total expense ratio were each approximately at the 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 also considered whether the Fund may benefit from any economies of scale in the management of the Fund in the event of growth in assets of the Fund and/or growth in assets of the MFS Funds as a whole.  They noted that the Fund’s advisory fee rate schedule is subject to a contractual breakpoint that reduces the Fund’s advisory fee rate on average daily net assets over $5 billion.  The Trustees also noted that MFS has agreed in writing to waive a portion of the management fees of certain MFS Funds, including the Fund, if the total combined assets of certain funds within the MFS Funds’ complex increase above agreed upon thresholds (the “group fee waiver”), enabling the Fund’s shareholders to share in the benefits from any economies of scale at the complex level.  The group fee waiver is reviewed and renewed annually between the Board and MFS.  The Trustees concluded that the breakpoint and the group fee waiver were sufficient to allow the Fund to benefit from economies of scale as its assets and overall complex assets grow.

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 advisory agreement, that the advisory fees charged to the Fund represent 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 advisory agreement, including any 12b-1 fees the Fund pays to MFS Fund Distributors, Inc., an affiliate of MFS.  The Trustees also considered the nature, extent and quality of certain other services MFS performs or arranges 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 advisory agreement with MFS should be continued for an additional one-year period, commencing August 1, 2026.

54


MFS Government Securities Fund

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

MFS Government Securities Fund

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 – 93.0%

Asset-Backed & Securitized – 7.9%

3650R Commercial Mortgage Trust, 2021-PF1, “XA”, 1.096%, 11/15/2054 (i)

$

21,301,201

$633,114

ACREC 2021-FL1 Ltd., “AS”, FLR, 5.253% ((SOFR - 1mo. + 0.11448%) + 1.5%), 10/16/2036 (n)

1,977,559

1,977,553

Affirm, Inc., 2026-X1, “A”, 4.27%, 4/15/2031 (n)

2,201,686

2,200,879

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

4,948,079

4,943,777

AREIT 2022-CRE6 Trust, “AS”, FLR, 5.286% (SOFR - 30 day + 1.65%), 1/20/2037 (n)

7,155,500

7,146,966

ARI Fleet Lease Trust, 2023-B, “A2”, 6.05%, 7/15/2032 (n)

126,996

127,246

AutoNation Finance Trust, 2026-N1A, “A2”, 4.48%, 2/15/2029 (n)

2,124,000

2,122,095

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

5,500,000

5,508,046

BBCMS Mortgage Trust, 2021-C10, “XA”, 1.306%, 7/15/2054 (i)

18,262,336

791,354

BBCMS Mortgage Trust, 2021-C9, “XA”, 1.659%, 2/15/2054 (i)

12,976,524

700,928

BBCMS Mortgage Trust, 2022-C18, “XA”, 0.656%, 12/15/2055 (i)

22,297,816

669,583

BDS Ltd., 2024-FL13, “A”, FLR, 5.223% (SOFR - 1mo. + 1.5762%), 9/19/2039 (n)

1,419,789

1,420,438

Benchmark 2021-B23 Mortgage Trust, “XA”, 1.352%, 2/15/2054 (i)

42,355,766

1,661,024

Benchmark 2021-B24 Mortgage Trust, “XA”, 1.19%, 3/15/2054 (i)

24,251,265

813,140

Benchmark 2021-B26 Mortgage Trust, “XA”, 0.934%, 6/15/2054 (i)

35,795,997

985,514

Benchmark 2021-B27 Mortgage Trust, “XA”, 1.343%, 7/15/2054 (i)

32,008,774

1,298,113

Benchmark 2021-B28 Mortgage Trust, “XA”, 1.327%, 8/15/2054 (i)

37,668,840

1,602,455

Benchmark 2021-B29 Mortgage Trust, “XA”, 1.097%, 9/15/2054 (i)

43,462,641

1,292,266

Business Jet Securities LLC, 2024-1A, “A”, 6.197%, 5/15/2039 (n)

808,671

814,360

BX Trust, 2026-CLS, “A”, 5.039%, 5/15/2043 (n)

3,995,000

3,999,994

BX Trust, 2026-LBTY, “A”, FLR, 4.9% (SOFR - 1mo. + 1.25%), 8/15/2048 (n)

3,135,053

3,135,031

BXMT 2021-FL4 Ltd., “AS”, FLR, 5.304% ((SOFR - 1mo. + 0.11448%) + 1.3%), 5/15/2038 (n)

7,779,500

7,739,319

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

1,463,000

1,462,467

Citigroup Commercial Mortgage Trust, 2019-XA, “C7”, 0.938%, 12/15/2072 (i)(n)

20,647,974

481,403

Commercial Mortgage Pass-Through Certificates, 2021-BN31, “XA”, 1.385%, 2/15/2054 (i)

32,175,059

1,388,141

Commercial Mortgage Pass-Through Certificates, 2021-BN32, “XA”, 0.811%, 4/15/2054 (i)

17,868,993

450,340

Commercial Mortgage Pass-Through Certificates, 2021-BN35, “XA”, 1.108%, 6/15/2064 (i)

12,182,613

444,194

Commercial Mortgage Pass-Through Certificates, 2024-CBM, “A2”, 5.867%, 12/10/2041 (n)

1,395,974

1,400,323

CPS Auto Receivables Trust, 2026-C, “A”, 4.52%, 4/15/2030 (n)

1,857,014

1,856,646

EQT Trust, 2024-EXTR, “B”, 5.655%, 7/05/2041 (n)

1,503,054

1,504,753

Exeter Automobile Receivables Trust, 2026-2A, “A2”, 4.31%, 11/15/2028 

5,374,560

5,374,905

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

2,512,983

2,510,814

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

2,020,000

2,019,381

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

1,527,450

1,496,483

KREF 2018-FT1 Ltd., “AS”, FLR, 5.054% ((SOFR - 1mo. + 0.11448%) + 1.3%), 2/15/2039 (n)

13,217

13,214

LAD Select Auto Receivables Trust, 2026-A, “A2”, 4.59%, 4/16/2029 (n)

2,802,000

2,801,703

MF1 2021-FL7 Ltd., “A”, FLR, 4.833% ((SOFR - 1mo. + 0.11448%) + 1.08%), 10/16/2036 (n)

971,106

971,075

Morgan Stanley Capital I Trust, 2018-H4, “XA”, 0.966%, 12/15/2051 (i)

21,049,409

309,974

Morgan Stanley Capital I Trust, 2021-L5, “XA”, 1.301%, 5/15/2054 (i)

14,568,904

604,449

Morgan Stanley Capital I Trust, 2021-L6, “XA”, 1.209%, 6/15/2054 (i)

16,668,719

576,878

Morgan Stanley Capital I Trust, 2021-L7, “XA”, 1.171%, 10/15/2054 (i)

74,389,392

2,545,270

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

1,693,846

1,662,206

Morgan Stanley Residential Mortgage Loan Trust, 2024-NQM3, “A1”, 5.044%, 7/25/2069 (n)

1,149,351

1,139,093

Morgan Stanley Residential Mortgage Loan Trust, 2025-NQM3, “A1”, 5.53%, 5/25/2070 (n)

2,073,148

2,065,587

Morgan Stanley Residential Mortgage Loan Trust, 2026-INV1, “A9”, FLR, 4.793% (SOFR - 1mo. + 1.15%), 2/25/2061 (n)

2,461,493

2,442,988

MTN Commercial Mortgage Trust, 2026-LPFX, “A”, 5.153%, 5/15/2043 (n)

641,696

633,453

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

4,692,735

4,602,452

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

9,509,619

9,341,410

OBX Trust, 2024-NQM1, “A2”, 6.253%, 11/25/2063 (n)

341,757

341,441

MFGFS-SEM

1


MFS Government Securities Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Asset-Backed & Securitized – continued

OBX Trust, 2025-NQM8, “A1”, 5.472%, 3/25/2065 (n)

$

1,562,308

$1,557,397

Ocwen Loan Investment Trust, 2026-HB3, “A”, 3%, 6/25/2039 (n)

1,904,147

1,865,180

Palmer Square Loan Funding, 2024-3A Ltd., “A2R”, FLR, 4.907% (SOFR - 3mo. + 1.15%), 8/08/2032 (n)

1,530,612

1,530,930

Palmer Square Loan Funding, 2025-2A Ltd., “A2”, FLR, 5.153% (SOFR - 3mo. + 1.4%), 7/15/2033 (n)

8,550,000

8,551,163

PFS Financing Corp., 2023-C, “B”, 5.91%, 10/15/2028 (n)

1,302,000

1,304,163

PFS Financing Corp., 2025-A, “A”, FLR, 4.286% (SOFR - 1mo. + 0.65%), 1/15/2029 (n)

4,611,000

4,612,333

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

1,982,244

1,982,685

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

1,737,210

1,733,358

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

9,470,708

9,399,314

Provident Funding Mortgage Trust, 2024-1, “A3”, 5.5%, 12/25/2054 (n)

1,945,433

1,935,437

RCKT Trust, 2025-1A, “A”, 4.9%, 7/25/2034 (n)

232,350

232,534

Santander Drive Auto Receivables Trust, 2026-1, “A2”, 4.04%, 3/15/2029 

2,379,543

2,377,502

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

4,206,270

4,168,200

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

6,434,263

6,435,228

Verus Securitization Trust, 2024-1, “A2”, 5.915%, 1/25/2069 (n)

666,112

665,111

Wells Fargo Commercial Mortgage Trust, 2018-C48, “XA”, 1.098%, 1/15/2052 (i)(n)

11,761,890

187,802

Wells Fargo Commercial Mortgage Trust, 2021-C60, “XA”, 1.624%, 8/15/2054 (i)

18,204,978

1,035,352

$151,597,927

Consumer Services – 0.1%

Conservation Fund, 3.474%, 12/15/2029 

$

2,018,000

$1,904,355

Mortgage-Backed – 57.5%

Fannie Mae, 3%, 11/01/2028 - 9/01/2046 

$

6,291,632

$5,847,948

Fannie Mae, 3.5%, 1/25/2030 - 12/01/2047 

17,722,536

16,223,377

Fannie Mae, 2.5%, 11/01/2031 - 10/01/2046 

2,004,447

1,820,325

Fannie Mae, 3.5%, 12/25/2031 - 2/25/2036 (i)

582,651

40,848

Fannie Mae, 6.5%, 1/01/2032 - 10/01/2037 

325,908

336,715

Fannie Mae, 6%, 1/01/2033 - 12/01/2037 

896,516

915,097

Fannie Mae, 3%, 2/25/2033 - 1/25/2052 (i)

1,138,771

115,775

Fannie Mae, 5.5%, 5/01/2033 - 5/01/2044 

4,559,299

4,593,105

Fannie Mae, 5%, 11/01/2033 - 3/25/2042 

5,915,158

5,860,934

Fannie Mae, 4.5%, 3/01/2034 - 6/01/2044 

12,333,247

11,959,116

Fannie Mae, 4.208%, 4/25/2034 

19,900

19,895

Fannie Mae, 4%, 9/01/2040 - 7/01/2047 

24,576,006

23,283,851

Fannie Mae, 1%, 3/25/2041 

1,208,706

1,057,651

Fannie Mae, 4.108%, 3/25/2041 

216,051

215,450

Fannie Mae, 2.25%, 4/25/2041 

934,773

899,147

Fannie Mae, 4.258%, 7/25/2041 

208,495

207,212

Fannie Mae, 1.75%, 9/25/2041 

644,404

622,876

Fannie Mae, 2.75%, 9/25/2042 

666,578

642,656

Fannie Mae, 0.000%, 10/25/2043 

1,862,755

1,372,730

Fannie Mae, 2%, 8/25/2044 - 4/25/2046 

1,548,675

1,435,156

Fannie Mae, 4.058%, 12/25/2045 

463,466

458,245

Fannie Mae, 2.242%, 8/25/2046 - 9/25/2046 (i)

8,738,313

657,323

Fannie Mae, 2.442%, 12/25/2047 (i)

1,822,531

174,383

Fannie Mae, 4.5%, 3/15/2048 (i)

1,230,672

283,029

Fannie Mae, 2.392%, 10/25/2048 (i)

4,541,870

406,854

Fannie Mae, 2.292%, 6/25/2050 (i)

4,330,214

410,128

Fannie Mae, 2%, 9/25/2050 - 11/25/2051 (i)

5,338,444

639,115

Fannie Mae, 4%, 9/25/2050 (i)

2,569,195

488,688

Fannie Mae, 2.5%, 2/25/2051 (i)

1,769,482

237,795

Fannie Mae, 5.093%, 11/25/2053 

3,092,285

3,152,315

Fannie Mae, 5.543%, 11/25/2053 

2,329,851

2,386,568

2


MFS Government Securities Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Mortgage-Backed – continued

Fannie Mae, 5.643%, 11/25/2053 

$

6,744,727

$6,927,919

Fannie Mae, 4.543%, 12/25/2053 

1,294,034

1,299,067

Fannie Mae, 6.643%, 7/25/2054 

2,267,743

2,351,305

Fannie Mae, 4.793%, 10/25/2054 

2,417,704

2,421,177

Fannie Mae, 4.593%, 11/25/2054 

4,985,767

4,991,013

Fannie Mae, 4.993%, 11/25/2054 

8,488,837

8,536,366

Fannie Mae, 4.643%, 12/25/2054 

7,069,697

7,111,841

Fannie Mae, 5.043%, 12/25/2054 

5,644,105

5,681,927

Fannie Mae, 5.143%, 12/25/2054 

8,360,241

8,433,017

Fannie Mae, 4.943%, 1/25/2055 

6,922,325

6,954,082

Fannie Mae, 6.083%, 3/25/2055 

3,370,849

3,373,141

Fannie Mae, UMBS, 2.5%, 5/01/2036 - 8/01/2052 

79,353,077

66,186,325

Fannie Mae, UMBS, 5.5%, 10/01/2038 - 5/01/2055 

24,630,852

24,467,363

Fannie Mae, UMBS, 1.5%, 2/01/2042 - 3/01/2051 

1,276,412

986,757

Fannie Mae, UMBS, 2%, 2/01/2042 - 4/01/2052 

44,372,977

35,359,601

Fannie Mae, UMBS, 3.5%, 5/01/2049 - 2/01/2052 

1,601,077

1,440,091

Fannie Mae, UMBS, 3%, 6/01/2051 - 8/01/2052 

14,058,588

12,145,586

Fannie Mae, UMBS, 4%, 8/01/2051 - 2/01/2053 

4,743,144

4,382,059

Fannie Mae, UMBS, 4.5%, 9/01/2052 - 10/01/2055 

3,218,586

3,039,976

Fannie Mae, UMBS, 5%, 9/01/2052 - 11/01/2054 

860,869

832,380

Fannie Mae, UMBS, 6%, 2/01/2053 - 12/01/2054 

9,984,189

10,129,886

Freddie Mac, 3.12%, 9/25/2026 

7,133,384

7,113,674

Freddie Mac, 2.525%, 10/25/2026 

4,871,124

4,851,546

Freddie Mac, 3.413%, 12/25/2026 

15,946,877

15,881,425

Freddie Mac, 1.486%, 3/25/2027 (i)

5,583,000

29,368

Freddie Mac, 3.243%, 4/25/2027 

10,090,226

10,014,926

Freddie Mac, 3.117%, 6/25/2027 

20,236,646

20,047,166

Freddie Mac, 0.692%, 7/25/2027 (i)

97,448,673

308,133

Freddie Mac, 0.53%, 8/25/2027 (i)

75,230,522

248,644

Freddie Mac, 0.476%, 12/25/2027 (i)

1,188,569

4,794

Freddie Mac, 0.431%, 1/25/2028 (i)

134,107,728

456,275

Freddie Mac, 0.432%, 1/25/2028 - 5/25/2033 (i)

120,310,068

1,384,813

Freddie Mac, 0.249%, 2/25/2028 (i)

156,574,489

276,667

Freddie Mac, 0.246%, 4/25/2028 (i)

104,965,666

210,970

Freddie Mac, 0.617%, 10/25/2028 (i)

39,406,657

330,196

Freddie Mac, 0.6%, 5/25/2029 - 3/25/2031 (i)

95,570,350

1,315,982

Freddie Mac, 1.005%, 7/25/2029 (i)

31,354,116

679,039

Freddie Mac, 1.207%, 7/25/2029 (i)

18,485,852

491,123

Freddie Mac, 1.256%, 8/25/2029 (i)

32,564,151

910,031

Freddie Mac, 0.733%, 1/25/2030 (i)

17,877,823

286,410

Freddie Mac, 1.434%, 1/25/2030 - 6/25/2030 (i)

37,069,954

1,491,777

Freddie Mac, 1.697%, 1/25/2030 (i)

19,001,797

863,216

Freddie Mac, 1.913%, 4/25/2030 (i)

14,430,646

840,933

Freddie Mac, 1.954%, 4/25/2030 (i)

20,077,463

1,187,867

Freddie Mac, 0.579%, 5/25/2030 (i)

25,611,748

357,105

Freddie Mac, 1.769%, 5/25/2030 (i)

12,033,779

682,302

Freddie Mac, 1.908%, 5/25/2030 (i)

26,880,424

1,605,554

Freddie Mac, 5.5%, 6/01/2030 - 9/01/2041 

1,952,793

1,979,868

Freddie Mac, 1.2%, 6/25/2030 (i)

19,629,922

693,559

Freddie Mac, 1.467%, 6/25/2030 (i)

28,880,806

1,216,636

Freddie Mac, 1.701%, 8/25/2030 (i)

10,235,210

566,039

Freddie Mac, 1.261%, 9/25/2030 (i)

6,568,138

275,355

Freddie Mac, 1.17%, 11/25/2030 (i)

13,158,725

532,306

Freddie Mac, 0.404%, 1/25/2031 (i)

49,249,574

513,156

3


MFS Government Securities Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Mortgage-Backed – continued

Freddie Mac, 0.626%, 1/25/2031 (i)

$

70,182,335

$1,515,686

Freddie Mac, 0.87%, 1/25/2031 (i)

19,512,958

611,940

Freddie Mac, 1.025%, 1/25/2031 (i)

14,681,587

529,933

Freddie Mac, 5.481%, 2/25/2031 (i)

18,431,877

319,673

Freddie Mac, 0.827%, 3/25/2031 (i)

17,260,719

523,202

Freddie Mac, 1.321%, 5/25/2031 - 7/25/2031 (i)

29,681,096

1,539,801

Freddie Mac, 1.039%, 7/25/2031 (i)

11,674,001

481,003

Freddie Mac, 0.602%, 8/25/2031 (i)

14,770,824

310,239

Freddie Mac, 0.632%, 9/25/2031 (i)

50,814,178

1,211,918

Freddie Mac, 0.954%, 9/25/2031 (i)

48,419,608

1,809,092

Freddie Mac, 0.441%, 11/25/2031 (i)

73,361,326

1,184,859

Freddie Mac, 0.595%, 12/25/2031 (i)

73,957,916

1,641,171

Freddie Mac, 0.664%, 12/25/2031 (i)

12,187,459

303,378

Freddie Mac, 0.869%, 2/25/2032 (i)

49,680,895

1,828,292

Freddie Mac, 0.434%, 6/25/2032 (i)

116,203,070

2,004,271

Freddie Mac, 4.201%, 11/15/2032 

30,789

30,756

Freddie Mac, 0.302%, 11/25/2032 (i)

74,026,378

819,857

Freddie Mac, 4.2%, 4/25/2033 

27,000,000

25,943,806

Freddie Mac, 0.3%, 8/25/2033 (i)

78,666,400

849,282

Freddie Mac, 0.363%, 10/25/2033 (i)

75,772,703

1,100,174

Freddie Mac, 5%, 5/01/2034 - 12/01/2044 

5,424,635

5,394,406

Freddie Mac, 6%, 8/01/2034 - 10/01/2038 

1,931,419

1,981,084

Freddie Mac, 1.092%, 9/25/2034 (i)

9,883,118

621,864

Freddie Mac, 0.22%, 1/25/2035 (i)

119,066,272

975,534

Freddie Mac, 0.427%, 1/25/2035 (i)

47,468,092

983,463

Freddie Mac, 0.214%, 12/25/2035 (i)

114,495,340

953,105

Freddie Mac, 5.5%, 2/15/2036 (i)

206,995

30,913

Freddie Mac, 0.277%, 5/25/2036 (i)

107,309,007

1,391,755

Freddie Mac, 6.5%, 5/01/2037 

71,701

74,261

Freddie Mac, 4%, 8/01/2037 - 4/01/2044 

2,697,460

2,569,567

Freddie Mac, 3.5%, 11/01/2037 - 10/25/2058 

14,579,897

13,497,970

Freddie Mac, 3%, 1/01/2038 - 2/25/2059 

11,679,526

10,488,392

Freddie Mac, 4.5%, 7/01/2039 - 5/01/2042 

1,886,873

1,830,746

Freddie Mac, 4.5%, 12/15/2040 (i)

25,948

2,349

Freddie Mac, 1.75%, 8/15/2041 

523,325

498,291

Freddie Mac, 4.151%, 11/15/2043 - 8/15/2046 

1,399,710

1,388,714

Freddie Mac, 2.249%, 11/15/2048 (i)

8,994,227

692,256

Freddie Mac, 3%, 2/25/2049 - 10/25/2052 (i)

6,766,206

790,586

Freddie Mac, 2.292%, 8/25/2049 (i)

3,189,235

297,755

Freddie Mac, 2.5%, 11/25/2050 - 3/25/2051 (i)

10,643,315

1,707,370

Freddie Mac, 2%, 2/25/2051 - 3/25/2052 (i)

11,762,880

1,468,373

Freddie Mac, 4.843%, 9/25/2053 

8,136,135

8,201,281

Freddie Mac, 5.093%, 10/25/2053 

6,346,257

6,469,468

Freddie Mac, 5.643%, 11/25/2053 

9,072,296

9,318,941

Freddie Mac, 5.873%, 12/25/2053 

2,931,951

2,938,741

Freddie Mac, 4.743%, 1/25/2054 - 9/25/2054 

8,012,202

8,054,781

Freddie Mac, 4.943%, 1/25/2054 - 12/25/2054 

16,432,266

16,583,053

Freddie Mac, 5.143%, 12/25/2054 

10,103,331

10,180,703

Freddie Mac, 6.093%, 1/25/2055 

1,957,631

1,974,904

Freddie Mac, 7.593%, 9/25/2055 

782,068

807,843

Freddie Mac, 2.349%, 8/15/2057 (i)

2,794,252

294,978

Freddie Mac, 0.39%, 3/25/2061 (i)

64,696,386

688,792

Freddie Mac, 3.25%, 11/25/2061 

3,815,882

3,500,034

Freddie Mac, UMBS, 2.5%, 3/01/2037 - 9/01/2052 

21,133,806

17,488,002

4


MFS Government Securities Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Mortgage-Backed – continued

Freddie Mac, UMBS, 2%, 2/01/2042 - 3/01/2052 

$

15,931,688

$12,861,554

Freddie Mac, UMBS, 3.5%, 12/01/2046 - 5/01/2052 

2,146,557

1,938,225

Freddie Mac, UMBS, 3%, 2/01/2050 - 8/01/2052 

25,987,390

22,246,035

Freddie Mac, UMBS, 1.5%, 10/01/2051 - 11/01/2051 

476,777

355,774

Freddie Mac, UMBS, 4%, 5/01/2052 

3,467,615

3,192,531

Freddie Mac, UMBS, 5%, 11/01/2052 - 12/01/2054 

7,390,971

7,169,635

Freddie Mac, UMBS, 5.5%, 12/01/2052 - 7/01/2055 

14,346,559

14,279,966

Freddie Mac, UMBS, 6%, 2/01/2053 - 2/01/2055 

9,175,076

9,315,333

Freddie Mac, UMBS, 6.5%, 4/01/2054 - 11/01/2054 

3,260,550

3,378,773

Freddie Mac, UMBS, 4.5%, 11/01/2054 - 8/01/2055 

1,204,453

1,131,645

Ginnie Mae, 3.5%, 8/20/2029 - 1/20/2043 (i)

4,299,160

510,568

Ginnie Mae, 5.5%, 3/15/2033 - 10/20/2053 

2,125,592

2,130,159

Ginnie Mae, 4.5%, 7/20/2033 - 10/20/2052 

22,190,821

21,146,594

Ginnie Mae, 5.646%, 8/20/2034 

483,555

487,183

Ginnie Mae, 4%, 5/16/2039 - 7/20/2056 

2,964,795

2,746,648

Ginnie Mae, 5%, 8/20/2039 - 6/20/2056 

12,102,858

11,795,401

Ginnie Mae, 4%, 12/20/2039 - 9/20/2047 (i)

1,383,716

229,808

Ginnie Mae, 1.983%, 3/20/2040 (i)

6,013,638

378,053

Ginnie Mae, 1.633%, 5/20/2041 (i)

2,368,770

132,374

Ginnie Mae, 3.867%, 9/20/2041 

5,552,734

5,413,327

Ginnie Mae, 2.396%, 11/16/2041 (i)

1,414,272

39,648

Ginnie Mae, 3.5%, 12/15/2041 - 7/20/2043 

5,413,313

4,961,123

Ginnie Mae, 2.5%, 6/20/2042 - 1/20/2066 

20,102,934

16,853,753

Ginnie Mae, 3%, 2/20/2043 - 10/20/2052 

38,935,370

33,990,978

Ginnie Mae, 2.433%, 8/20/2044 - 7/20/2050 (i)

8,590,714

843,978

Ginnie Mae, 2.383%, 12/20/2044 - 4/20/2047 (i)

2,199,611

155,220

Ginnie Mae, 1.883%, 10/20/2045 (i)

5,554,918

388,793

Ginnie Mae, 2.283%, 4/20/2046 - 1/20/2049 (i)

5,111,984

448,732

Ginnie Mae, 2.496%, 2/16/2048 (i)

3,634,330

304,553

Ginnie Mae, 2.233%, 2/20/2049 (i)

5,550,132

405,508

Ginnie Mae, 2.5%, 10/20/2050 - 2/20/2051 (i)

10,971,190

1,615,565

Ginnie Mae, 2%, 11/20/2050 (i)

169,294

19,443

Ginnie Mae, 2.583%, 3/20/2051 (i)

3,599,907

415,484

Ginnie Mae, 2.561%, 5/20/2051 (i)

3,225,056

371,207

Ginnie Mae, 2.533%, 6/20/2051 (i)

10,998,707

1,176,864

Ginnie Mae, 2.361%, 7/20/2051 (i)

3,458,699

344,304

Ginnie Mae, 2%, 1/20/2052 - 11/20/2052 

31,480,497

25,285,497

Ginnie Mae, 3%, 2/20/2052 (i)

2,271,764

370,387

Ginnie Mae, 4.689%, 7/20/2053 - 10/20/2054 

15,883,108

15,942,501

Ginnie Mae, 4.539%, 8/20/2053 

6,999,983

7,006,152

Ginnie Mae, 4.639%, 8/20/2053 - 12/20/2064 

28,731,625

28,749,828

Ginnie Mae, 4.889%, 8/20/2053 - 4/20/2055 

10,926,000

11,021,289

Ginnie Mae, 4.989%, 9/20/2053 - 5/20/2055 

21,655,494

21,884,570

Ginnie Mae, 5.039%, 9/20/2053 

8,616,410

8,730,258

Ginnie Mae, 4.939%, 10/20/2053 

8,113,803

8,199,605

Ginnie Mae, 4.289%, 11/20/2053 - 8/20/2074 

9,203,897

9,199,303

Ginnie Mae, 4.739%, 11/20/2053 - 11/20/2054 

30,582,675

30,775,309

Ginnie Mae, 4.839%, 12/20/2053 - 4/20/2064 

35,573,749

35,773,478

Ginnie Mae, 4.589%, 3/20/2054 

7,449,693

7,448,509

Ginnie Mae, 4.838%, 3/20/2054 

7,022,068

7,045,260

Ginnie Mae, 4.789%, 6/20/2054 - 3/20/2064 

13,483,977

13,541,381

Ginnie Mae, 5.139%, 5/20/2055 

8,557,331

8,630,263

Ginnie Mae, 7.589%, 5/20/2055 

1,743,053

1,769,300

Ginnie Mae, 6.117%, 6/20/2055 

3,433,575

3,262,094

5


MFS Government Securities Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

Mortgage-Backed – continued

Ginnie Mae, 6.192%, 6/20/2055 

$

1,550,598

$1,473,948

Ginnie Mae, 1.711%, 7/20/2055 (i)

3,326,210

143,898

Ginnie Mae, 6%, 11/20/2055 

2,160,708

2,201,344

Ginnie Mae, 4.369%, 2/20/2056 

6,157,130

6,143,590

Ginnie Mae, 4.182%, 12/20/2060 

5,647

5,633

Ginnie Mae, 4.262%, 3/20/2061 - 10/20/2064 

133,715

133,489

Ginnie Mae, 4.282%, 3/20/2061 - 3/20/2070 

4,245,772

4,244,145

Ginnie Mae, 2.099%, 12/20/2062 (i)

3,144,080

134,692

Ginnie Mae, 4.232%, 4/20/2063 - 11/20/2067 

956,092

954,040

Ginnie Mae, 2.461%, 5/20/2064 (i)

6,393,546

278,445

Ginnie Mae, 4.462%, 7/20/2064 

408,125

408,991

Ginnie Mae, 4.382%, 3/20/2065 

22,416

22,441

Ginnie Mae, 4.439%, 8/20/2065 - 2/20/2066 

19,227,118

19,145,370

Ginnie Mae, 4.488%, 9/20/2065 

8,142,291

8,162,436

Ginnie Mae, 4.832%, 2/20/2066 

66,913

67,318

Ginnie Mae, 2.255%, 3/20/2066 (i)

906,891

31,251

Ginnie Mae, 4.532%, 10/20/2066 

538,330

540,167

Ginnie Mae, 4.552%, 10/20/2066 

1,445,069

1,450,810

Ginnie Mae, 4.541%, 1/20/2067 

1,294,920

1,300,255

Ginnie Mae, 4.392%, 2/20/2067 

1,044,419

1,046,567

Ginnie Mae, 4.506%, 3/20/2067 

2,069,795

2,074,957

Ginnie Mae, 4.089%, 5/20/2067 

5,970,559

5,959,257

Ginnie Mae, 5.041%, 7/20/2067 

2,616,857

2,631,942

Ginnie Mae, 4.139%, 8/20/2067 

8,032,345

8,016,071

Ginnie Mae, 4.298%, 4/20/2068 

4,717,402

4,718,423

Ginnie Mae, 4.039%, 12/20/2071 

1,719,606

1,713,563

Ginnie Mae, 4.545%, 12/20/2071 

437,365

433,672

Ginnie Mae, 3.639%, 11/20/2074 

1,552,706

1,537,816

UMBS, TBA, 1.5%, 9/25/2056 

5,050,000

3,762,861

UMBS, TBA, 2%, 9/25/2056 

31,125,000

24,271,542

UMBS, TBA, 2.5%, 9/25/2056 

12,154,000

9,912,173

$1,100,891,479

U.S. Government Agencies and Equivalents – 0.1%

Small Business Administration, 2.21%, 2/01/2033 

$

324,884

$300,639

Small Business Administration, 2.22%, 3/01/2033 

624,944

582,447

Small Business Administration, 3.15%, 7/01/2033 

521,289

495,655

Small Business Administration, 3.16%, 8/01/2033 

207,947

196,318

Small Business Administration, 3.62%, 9/01/2033 

194,114

187,125

$1,762,184

U.S. Treasury Obligations – 27.4%

U.S. Treasury Bonds, 6.375%, 8/15/2027 

$

2,309,000

$2,355,451

U.S. Treasury Bonds, 4.375%, 2/15/2038 

2,078,000

2,010,709

U.S. Treasury Bonds, 3.125%, 2/15/2043 

9,748,800

7,538,564

U.S. Treasury Bonds, 2.875%, 5/15/2043 

27,528,200

20,424,634

U.S. Treasury Bonds, 4.75%, 11/15/2043 

11,168,000

10,613,962

U.S. Treasury Bonds, 2.5%, 2/15/2045 

97,983,000

66,111,733

U.S. Treasury Bonds, 4.75%, 2/15/2045 

36,531,000

34,474,704

U.S. Treasury Bonds, 5%, 5/15/2045 

4,336,000

4,217,099

U.S. Treasury Bonds, 4.625%, 5/15/2054 

11,176,000

10,130,869

U.S. Treasury Bonds, 4.625%, 2/15/2055 

11,722,000

10,624,436

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

6,088,000

5,631,638

U.S. Treasury Bonds, 5%, 5/15/2056 

25,843,400

24,906,577

6


MFS Government Securities Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Bonds – continued

U.S. Treasury Obligations – continued

U.S. Treasury Notes, 3.375%, 11/30/2027 

$

21,069,000

$20,836,912

U.S. Treasury Notes, 3.375%, 12/31/2027 

7,056,000

6,972,210

U.S. Treasury Notes, 2.75%, 2/15/2028 

54,157,000

52,978,662

U.S. Treasury Notes, 3.625%, 3/31/2028 (f)

65,576,000

64,879,255

U.S. Treasury Notes, 1%, 7/31/2028 

32,248,000

30,285,407

U.S. Treasury Notes, 2.375%, 5/15/2029 

19,515,500

18,519,905

U.S. Treasury Notes, 3.5%, 4/30/2030 

18,675,000

18,079,734

U.S. Treasury Notes, 4.125%, 8/31/2030 

37,647,000

37,174,942

U.S. Treasury Notes, 1.625%, 5/15/2031 

41,833,000

36,786,894

U.S. Treasury Notes, 1.375%, 11/15/2031 

11,425,300

9,768,185

U.S. Treasury Notes, 4.25%, 8/15/2035 

31,630,000

30,563,723

$525,886,205

Total Bonds (Identified Cost, $1,885,670,923)

$1,782,042,150

Mutual Funds (h) – 8.3%

Money Market Funds – 8.3%

MFS Institutional Money Market Portfolio, 3.75% (v) (Identified Cost, $159,900,949)

159,892,483

$159,908,472

Other Assets, Less Liabilities – (1.3)%

(25,804,589)

Net Assets – 100.0%

$1,916,146,033

(f)

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

(h)

An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under

common control. At period end, the aggregate values of the fund's investments in affiliated issuers and in unaffiliated issuers were $159,908,472 and

$1,782,042,150, respectively.

(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.

(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

$124,580,964, representing 6.5% of net assets.

(v)

Affiliated issuer that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio is the

annualized seven-day yield of the fund at period end.

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

CLO

Collateralized Loan Obligation

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.

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 Note 10 yr

Short

USD

212

$23,197,437

December – 2026

$111,844

Liability Derivatives

Interest Rate Futures

U.S. Treasury Note 10 yr

Long

USD

2,299

$247,501,719

December – 2026

$(741,886

)

7


MFS Government Securities Fund

Portfolio of Investments (unaudited) – continued

Futures Contracts - continued

Description

Long/

Short

Currency

Contracts

Notional

Amount

Expiration

Date

Value/Unrealized

Appreciation

(Depreciation)

Liability Derivatives - continued

Interest Rate Futures - continued

U.S. Treasury Note 2 yr

Long

USD

3,023

$620,423,519

December – 2026

$(1,197,993

)

U.S. Treasury Note 5 yr

Long

USD

2,661

281,276,015

December – 2026

(1,194,403

)

U.S. Treasury Ultra Bond 30 yr

Long

USD

344

37,850,750

December – 2026

(264,238

)

$(3,398,520

)

Cleared Swap Agreements

Maturity

Date

Notional

Amount

Counterparty

Cash Flows

to Receive/

Frequency

Cash Flows

to Pay/

Frequency

Unrealized

Appreciation

(Depreciation)

Net

Unamortized

Upfront

Payments

(Receipts)

Value

Asset Derivatives

Interest Rate Swaps

5/01/28

USD

194,750,000

centrally cleared

1-day SOFR / Annually

3.7185% / Annually

$2,373,173

$—

$2,373,173

8/31/28

USD

302,043,000

centrally cleared

1-day SOFR / Annually

4.089% / Annually

710,583

—

710,583

1/09/29

USD

100,500,000

centrally cleared

1-day SOFR / Annually

3.35% / Annually

2,100,961

—

2,100,961

4/30/29

USD

97,620,000

centrally cleared

1-day SOFR / Annually

3.637% / Annually

1,414,518

—

1,414,518

1/14/31

USD

60,400,000

centrally cleared

1-day SOFR / Annually

3.5105% / Annually

1,758,080

—

1,758,080

6/12/33

USD

47,552,000

centrally cleared

1-day SOFR / Annually

4.036% / Annually

614,733

—

614,733

$8,972,048

$—

$8,972,048

At August 31, 2026, the fund had liquid securities collateral with an aggregate value of $25,974,193 to cover any collateral or margin obligations for certain derivative contracts.

See Notes to Financial Statements

8


MFS Government Securities Fund

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, $1,885,670,923)

$1,782,042,150

Investments in affiliated issuers, at value (identified cost, $159,900,949)

159,908,472

Receivables for

Net daily variation margin on open cleared swap agreements

1,070,885

Investments sold

6,500,337

Fund shares sold

508,379

Interest

8,016,572

Other assets

13,534

Total assets

$1,958,060,329

Liabilities

Payable to custodian

$64,751

Payables for

Distributions

183,595

Due to cleared swap brokers

162,850

Net daily variation margin on open futures contracts

867,068

Investments purchased

1,236,340

TBA purchase commitments

38,001,771

Fund shares reacquired

1,002,388

Payable to affiliates

Investment adviser

76,013

Administrative services fee

2,945

Shareholder servicing costs

188,926

Distribution and service fees

10,723

Accrued expenses and other liabilities

116,926

Total liabilities

$41,914,296

Net assets

$1,916,146,033

Net assets consist of

Paid-in capital

$2,361,506,144

Total distributable earnings (loss)

(445,360,111

)

Net assets

$1,916,146,033

Shares of beneficial interest outstanding

227,217,065

Net assets

Shares

outstanding

Net asset value

per share (a)

Class A

$295,113,440

34,957,315

$8.44

Class B

134,983

16,012

8.43

Class C

3,664,728

433,305

8.46

Class I

244,415,680

29,003,094

8.43

Class R1

588,934

69,820

8.44

Class R2

32,460,998

3,849,372

8.43

Class R3

14,234,194

1,686,851

8.44

Class R4

22,262,105

2,637,817

8.44

Class R6

1,303,270,971

154,563,479

8.43

(a)

Maximum offering price per share was equal to the net asset value per share for all share classes, except for Class A, for which the maximum

offering price per share was $8.81 [100 / 95.75 x $8.44]. On sales of $100,000 or more, the maximum offering price of Class A shares is

reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, and Class C shares. Redemption price per

share was equal to the net asset value per share for Classes I, R1, R2, R3, R4, and R6.

See Notes to Financial Statements

9


MFS Government Securities Fund

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

$38,963,147

Dividends from affiliated issuers

1,395,551

Total investment income

$40,358,698

Expenses

Management fee

$3,669,118

Distribution and service fees

513,744

Shareholder servicing costs

478,671

Administrative services fee

136,922

Independent Trustees' compensation

20,295

Custodian fee

66,557

Shareholder communications

23,178

Audit and tax fees

42,624

Legal fees

4,657

Miscellaneous

139,680

Total expenses

$5,095,446

Fees paid indirectly

(639

)

Reduction of expenses by investment adviser and distributor

(135,403

)

Net expenses

$4,959,404

Net investment income (loss)

$35,399,294

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers

$(6,233,524

)

Affiliated issuers

15,725

Futures contracts

(31,375,851

)

Swap agreements

1,925,809

Foreign currency

(3

)

Net realized gain (loss)

$(35,667,844

)

Change in unrealized appreciation or depreciation

Unaffiliated issuers

$(53,112,086

)

Affiliated issuers

2,978

Futures contracts

(7,638,114

)

Swap agreements

10,266,530

Net unrealized gain (loss)

$(50,480,692

)

Net realized and unrealized gain (loss)

$(86,148,536

)

Change in net assets from operations

$(50,749,242

)

See Notes to Financial Statements

10


MFS Government Securities Fund

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)

$35,399,294

$69,476,210

Net realized gain (loss)

(35,667,844

)

6,714,110

Net unrealized gain (loss)

(50,480,692

)

36,959,563

Change in net assets from operations

$(50,749,242

)

$113,149,883

Total distributions to shareholders

$(37,481,697

)

$(73,481,884

)

Change in net assets from fund share transactions

$(17,604,454

)

$(20,315,781

)

Total change in net assets

$(105,835,393

)

$19,352,218

Net assets

At beginning of period

2,021,981,426

2,002,629,208

At end of period

$1,916,146,033

$2,021,981,426

See Notes to Financial Statements

11


MFS Government Securities Fund

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. 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 share class (assuming reinvestment of all distributions) held for the entire period. 

Class A 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$8.83

$8.66

$8.54

$8.69

$9.81

$10.15

Income (loss) from investment operations

Net investment income (loss) (d)

$0.15

$0.28

$0.28

$0.25

$0.15

$0.07

Net realized and unrealized gain (loss)

(0.39

)

0.19

0.16

(0.12

)

(1.11

)

(0.31

)

Total from investment operations

$(0.24

)

$0.47

$0.44

$0.13

$(0.96

)

$(0.24

)

Less distributions declared to shareholders

From net investment income

$(0.15

)

$(0.30

)

$(0.32

)

$(0.28

)

$(0.16

)

$(0.10

)

Net asset value, end of period (x)

$8.44

$8.83

$8.66

$8.54

$8.69

$9.81

Total return (%) (r)(s)(t)(x)

(2.67

)(n)

5.57

5.23

1.51

(9.83

)

(2.43

)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)

0.78

(a)

0.78

0.78

0.78

0.78

0.79

Expenses after expense reductions (f)

0.77

(a)

0.76

0.77

0.77

0.76

0.78

Net investment income (loss)

3.36

(a)

3.29

3.26

2.89

1.63

0.73

Portfolio turnover rate

87

(n)

139

195

195

198

398

Net assets at end of period (000 omitted)

$295,113

$330,362

$367,305

$415,010

$468,595

$589,493

Supplemental Rate:

Portfolio turnover rate (excluding TBA transactions) (e)

32

(n)

53

66

73

N/A

N/A

See Notes to Financial Statements

12


MFS Government Securities Fund

Financial Highlights - continued

Class B 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$8.82

$8.65

$8.53

$8.68

$9.80

$10.14

Income (loss) from investment operations

Net investment income (loss) (d)

$0.11

$0.22

$0.22

$0.18

$0.08

$(0.00

)(w)

Net realized and unrealized gain (loss)

(0.38

)

0.19

0.15

(0.12

)

(1.11

)

(0.32

)

Total from investment operations

$(0.27

)

$0.41

$0.37

$0.06

$(1.03

)

$(0.32

)

Less distributions declared to shareholders

From net investment income

$(0.12

)

$(0.24

)

$(0.25

)

$(0.21

)

$(0.09

)

$(0.02

)

Net asset value, end of period (x)

$8.43

$8.82

$8.65

$8.53

$8.68

$9.80

Total return (%) (r)(s)(t)(x)

(3.04

)(n)

4.79

4.45

0.75

(10.52

)

(3.16

)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)

1.53

(a)

1.53

1.53

1.53

1.53

1.54

Expenses after expense reductions (f)

1.52

(a)

1.52

1.52

1.52

1.51

1.53

Net investment income (loss)

2.61

(a)

2.55

2.51

2.12

0.83

(0.02

)

Portfolio turnover rate

87

(n)

139

195

195

198

398

Net assets at end of period (000 omitted)

$135

$234

$535

$936

$1,529

$2,757

Supplemental Rate:

Portfolio turnover rate (excluding TBA transactions) (e)

32

(n)

53

66

73

N/A

N/A

Class C 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$8.85

$8.67

$8.55

$8.70

$9.83

$10.17

Income (loss) from investment operations

Net investment income (loss) (d)

$0.11

$0.22

$0.22

$0.18

$0.07

$(0.00

)(w)

Net realized and unrealized gain (loss)

(0.38

)

0.20

0.15

(0.12

)

(1.11

)

(0.32

)

Total from investment operations

$(0.27

)

$0.42

$0.37

$0.06

$(1.04

)

$(0.32

)

Less distributions declared to shareholders

From net investment income

$(0.12

)

$(0.24

)

$(0.25

)

$(0.21

)

$(0.09

)

$(0.02

)

Net asset value, end of period (x)

$8.46

$8.85

$8.67

$8.55

$8.70

$9.83

Total return (%) (r)(s)(t)(x)

(3.03

)(n)

4.90

4.44

0.76

(10.58

)

(3.15

)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)

1.53

(a)

1.53

1.53

1.53

1.53

1.54

Expenses after expense reductions (f)

1.52

(a)

1.51

1.52

1.52

1.51

1.53

Net investment income (loss)

2.61

(a)

2.53

2.51

2.13

0.83

(0.01

)

Portfolio turnover rate

87

(n)

139

195

195

198

398

Net assets at end of period (000 omitted)

$3,665

$3,454

$2,910

$3,704

$5,146

$10,187

Supplemental Rate:

Portfolio turnover rate (excluding TBA transactions) (e)

32

(n)

53

66

73

N/A

N/A

See Notes to Financial Statements

13


MFS Government Securities Fund

Financial Highlights - continued

Class I 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$8.82

$8.64

$8.52

$8.67

$9.80

$10.14

Income (loss) from investment operations

Net investment income (loss) (d)

$0.16

$0.31

$0.30

$0.27

$0.17

$0.10

Net realized and unrealized gain (loss)

(0.38

)

0.19

0.16

(0.12

)

(1.12

)

(0.32

)

Total from investment operations

$(0.22

)

$0.50

$0.46

$0.15

$(0.95

)

$(0.22

)

Less distributions declared to shareholders

From net investment income

$(0.17

)

$(0.32

)

$(0.34

)

$(0.30

)

$(0.18

)

$(0.12

)

Net asset value, end of period (x)

$8.43

$8.82

$8.64

$8.52

$8.67

$9.80

Total return (%) (r)(s)(t)(x)

(2.56

)(n)

5.95

5.49

1.76

(9.71

)

(2.18

)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)

0.53

(a)

0.53

0.53

0.53

0.53

0.53

Expenses after expense reductions (f)

0.52

(a)

0.51

0.52

0.52

0.51

0.52

Net investment income (loss)

3.61

(a)

3.53

3.51

3.15

1.88

0.97

Portfolio turnover rate

87

(n)

139

195

195

198

398

Net assets at end of period (000 omitted)

$244,416

$257,737

$234,727

$358,416

$233,540

$274,851

Supplemental Rate:

Portfolio turnover rate (excluding TBA transactions) (e)

32

(n)

53

66

73

N/A

N/A

Class R1 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$8.82

$8.65

$8.53

$8.68

$9.80

$10.14

Income (loss) from investment operations

Net investment income (loss) (d)

$0.11

$0.22

$0.22

$0.18

$0.08

$(0.00

)(w)

Net realized and unrealized gain (loss)

(0.37

)

0.19

0.15

(0.12

)

(1.11

)

(0.32

)

Total from investment operations

$(0.26

)

$0.41

$0.37

$0.06

$(1.03

)

$(0.32

)

Less distributions declared to shareholders

From net investment income

$(0.12

)

$(0.24

)

$(0.25

)

$(0.21

)

$(0.09

)

$(0.02

)

Net asset value, end of period (x)

$8.44

$8.82

$8.65

$8.53

$8.68

$9.80

Total return (%) (r)(s)(t)(x)

(2.93

)(n)

4.79

4.45

0.75

(10.52

)

(3.16

)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)

1.54

(a)

1.53

1.53

1.53

1.53

1.54

Expenses after expense reductions (f)

1.52

(a)

1.52

1.52

1.52

1.51

1.53

Net investment income (loss)

2.63

(a)

2.58

2.51

2.15

0.89

(0.02

)

Portfolio turnover rate

87

(n)

139

195

195

198

398

Net assets at end of period (000 omitted)

$589

$782

$1,501

$1,592

$1,587

$1,960

Supplemental Rate:

Portfolio turnover rate (excluding TBA transactions) (e)

32

(n)

53

66

73

N/A

N/A

See Notes to Financial Statements

14


MFS Government Securities Fund

Financial Highlights - continued

Class R2 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$8.82

$8.65

$8.53

$8.68

$9.80

$10.14

Income (loss) from investment operations

Net investment income (loss) (d)

$0.13

$0.26

$0.26

$0.23

$0.13

$0.05

Net realized and unrealized gain (loss)

(0.38

)

0.19

0.16

(0.12

)

(1.11

)

(0.32

)

Total from investment operations

$(0.25

)

$0.45

$0.42

$0.11

$(0.98

)

$(0.27

)

Less distributions declared to shareholders

From net investment income

$(0.14

)

$(0.28

)

$(0.30

)

$(0.26

)

$(0.14

)

$(0.07

)

Net asset value, end of period (x)

$8.43

$8.82

$8.65

$8.53

$8.68

$9.80

Total return (%) (r)(s)(t)(x)

(2.80

)(n)

5.31

4.97

1.26

(10.07

)

(2.67

)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)

1.03

(a)

1.03

1.03

1.03

1.03

1.04

Expenses after expense reductions (f)

1.02

(a)

1.02

1.02

1.02

1.01

1.03

Net investment income (loss)

3.12

(a)

3.04

3.01

2.64

1.39

0.48

Portfolio turnover rate

87

(n)

139

195

195

198

398

Net assets at end of period (000 omitted)

$32,461

$33,660

$37,232

$36,279

$40,295

$49,375

Supplemental Rate:

Portfolio turnover rate (excluding TBA transactions) (e)

32

(n)

53

66

73

N/A

N/A

Class R3 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$8.83

$8.65

$8.53

$8.68

$9.81

$10.15

Income (loss) from investment operations

Net investment income (loss) (d)

$0.15

$0.29

$0.28

$0.25

$0.15

$0.07

Net realized and unrealized gain (loss)

(0.39

)

0.19

0.16

(0.12

)

(1.12

)

(0.31

)

Total from investment operations

$(0.24

)

$0.48

$0.44

$0.13

$(0.97

)

$(0.24

)

Less distributions declared to shareholders

From net investment income

$(0.15

)

$(0.30

)

$(0.32

)

$(0.28

)

$(0.16

)

$(0.10

)

Net asset value, end of period (x)

$8.44

$8.83

$8.65

$8.53

$8.68

$9.81

Total return (%) (r)(s)(t)(x)

(2.67

)(n)

5.69

5.23

1.51

(9.93

)

(2.43

)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)

0.78

(a)

0.78

0.78

0.78

0.78

0.79

Expenses after expense reductions (f)

0.77

(a)

0.77

0.77

0.77

0.76

0.78

Net investment income (loss)

3.37

(a)

3.29

3.26

2.89

1.62

0.73

Portfolio turnover rate

87

(n)

139

195

195

198

398

Net assets at end of period (000 omitted)

$14,234

$17,078

$20,145

$22,264

$27,808

$38,286

Supplemental Rate:

Portfolio turnover rate (excluding TBA transactions) (e)

32

(n)

53

66

73

N/A

N/A

See Notes to Financial Statements

15


MFS Government Securities Fund

Financial Highlights - continued

Class R4 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$8.83

$8.65

$8.54

$8.69

$9.81

$10.15

Income (loss) from investment operations

Net investment income (loss) (d)

$0.16

$0.31

$0.30

$0.27

$0.17

$0.10

Net realized and unrealized gain (loss)

(0.38

)

0.19

0.15

(0.12

)

(1.11

)

(0.32

)

Total from investment operations

$(0.22

)

$0.50

$0.45

$0.15

$(0.94

)

$(0.22

)

Less distributions declared to shareholders

From net investment income

$(0.17

)

$(0.32

)

$(0.34

)

$(0.30

)

$(0.18

)

$(0.12

)

Net asset value, end of period (x)

$8.44

$8.83

$8.65

$8.54

$8.69

$9.81

Total return (%) (r)(s)(t)(x)

(2.55

)(n)

5.95

5.36

1.76

(9.60

)

(2.18

)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)

0.53

(a)

0.53

0.53

0.53

0.53

0.54

Expenses after expense reductions (f)

0.52

(a)

0.51

0.52

0.52

0.51

0.53

Net investment income (loss)

3.62

(a)

3.53

3.51

3.14

1.87

0.98

Portfolio turnover rate

87

(n)

139

195

195

198

398

Net assets at end of period (000 omitted)

$22,262

$24,638

$23,195

$42,489

$42,785

$53,252

Supplemental Rate:

Portfolio turnover rate (excluding TBA transactions) (e)

32

(n)

53

66

73

N/A

N/A

Class R6 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$8.82

$8.65

$8.53

$8.68

$9.80

$10.14

Income (loss) from investment operations

Net investment income (loss) (d)

$0.16

$0.31

$0.31

$0.28

$0.18

$0.11

Net realized and unrealized gain (loss)

(0.38

)

0.19

0.16

(0.12

)

(1.11

)

(0.32

)

Total from investment operations

$(0.22

)

$0.50

$0.47

$0.16

$(0.93

)

$(0.21

)

Less distributions declared to shareholders

From net investment income

$(0.17

)

$(0.33

)

$(0.35

)

$(0.31

)

$(0.19

)

$(0.13

)

Net asset value, end of period (x)

$8.43

$8.82

$8.65

$8.53

$8.68

$9.80

Total return (%) (r)(s)(t)(x)

(2.51

)(n)

5.93

5.59

1.87

(9.52

)

(2.08

)

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions (f)

0.44

(a)

0.44

0.43

0.43

0.43

0.44

Expenses after expense reductions (f)

0.42

(a)

0.42

0.42

0.41

0.41

0.42

Net investment income (loss)

3.71

(a)

3.62

3.61

3.25

1.98

1.08

Portfolio turnover rate

87

(n)

139

195

195

198

398

Net assets at end of period (000 omitted)

$1,303,271

$1,354,036

$1,315,080

$1,265,255

$1,308,767

$1,561,273

Supplemental Rate:

Portfolio turnover rate (excluding TBA transactions) (e)

32

(n)

53

66

73

N/A

N/A

See Notes to Financial Statements

16


MFS Government Securities Fund

Financial Highlights - continued

(a)

Annualized.

(d)

Per share data is based on average shares outstanding.

(e)

Portfolio turnover rate (excluding TBA transactions) is disclosed beginning with the period ending February 29, 2024. Refer to Note 2 for more

information on TBA transactions and mortgage dollar rolls.

(f)

Ratios do not reflect reductions from fees paid indirectly, if applicable. See Note 2 in the Notes to Financial Statements for additional information.

(n)

Not annualized.

(r)

Certain expenses have been reduced without which performance would have been lower.

(s)

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

(t)

Total returns do not include any applicable sales charges.

(w)

Per share amount was less than $0.01.

(x)

The net asset values and total returns 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 Government Securities Fund

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS Government Securities Fund (the fund) is a diversified series of MFS Series Trust XIII (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, 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. Exchange-traded options are generally valued at the last sale or official closing price on their primary exchange as provided by a third-party pricing service. Exchange-traded options for which there were no sales reported that day are generally valued at the last daily bid quotation on their primary exchange as provided by a third-party pricing service. For put options, the position may be valued at the last daily ask quotation if there are no trades reported during the day. Options not traded on an exchange are generally valued at a broker/dealer bid quotation. Foreign currency options are generally valued at valuations provided by a third-party pricing service. 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. Swap agreements are generally valued using valuations provided by a third-party pricing service, which for cleared swaps includes an evaluation of any trading activity at the clearinghouses. 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

18


MFS Government Securities Fund

Notes to Financial Statements (unaudited) - continued 

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. Other financial instruments are derivative instruments, such as futures contracts and swap agreements. 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

$—

$527,648,389

$—

$527,648,389

U.S. Corporate Bonds

—

1,904,355

—

1,904,355

Residential Mortgage-Backed Securities

—

1,147,289,821

—

1,147,289,821

Commercial Mortgage-Backed Securities

—

45,451,571

—

45,451,571

Asset-Backed Securities (including CDOs)

—

59,748,014

—

59,748,014

Investment Companies

159,908,472

—

—

159,908,472

Total

$159,908,472

$1,782,042,150

$—

$1,941,950,622

Other Financial Instruments

Futures Contracts – Assets

$111,844

$—

$—

$111,844

Futures Contracts – Liabilities

(3,398,520

)

—

—

(3,398,520

)

Swap Agreements – Assets

—

8,972,048

—

8,972,048

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.

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.

19


MFS Government Securities Fund

Notes to Financial Statements (unaudited) - continued 

The derivative instruments used by the fund during the period were purchased options, futures contracts, and swap agreements. 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.

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

$111,844

$(3,398,520)

Interest Rate

Cleared Swap Agreements

8,972,048

—

Total

$9,083,892

$(3,398,520)

(a) Values presented in this table for futures contracts and cleared swap agreements correspond to the values reported in the Portfolio of Investments. Only the current day net variation margin for futures contracts and cleared swap agreements 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

Swap

Agreements

Unaffiliated Issuers

(Purchased

Options)

Interest Rate

$(31,375,851

)

$1,925,809

$(12,130

)

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

Swap

Agreements

Unaffiliated Issuers

(Purchased

Options)

Interest Rate

$(7,638,114

)

$10,266,530

$78,916

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.

20


MFS Government Securities Fund

Notes to Financial Statements (unaudited) - continued 

Purchased Options — The fund purchased call and put options for a premium. Purchased call and put options entitle the holder to buy and sell a specified number of shares or units of a particular security, currency or index at a specified price at a specified date or within a specified period of time. Purchasing call options may hedge against an anticipated increase in the dollar cost of securities or currency to be acquired or increase the fund’s exposure to an underlying instrument. Purchasing put options may hedge against an anticipated decline in the value of portfolio securities or currency or decrease the fund's exposure to an underlying instrument.

A purchased swaption represents an option that gives the fund as purchaser the right, but not the obligation, to enter into a pre-defined interest rate or credit default swap agreement with the counterparty at a specified rate at a specified date or within a specified period of time. The fund enters into swaptions primarily to preserve a return or spread on a particular investment or portion of the fund’s investments, to adjust the fund’s sensitivity to underlying risk factors or to protect against an increase or decrease in the price of securities.

The premium paid is initially recorded as an investment in the Statement of Assets and Liabilities. That investment is subsequently marked-to-market daily with the difference between the premium paid and the market value of the purchased option being recorded as unrealized appreciation or depreciation. Premiums paid for purchased call and put options which have expired are treated as realized losses on investments in the Statement of Operations. Upon the exercise or closing of a purchased call option, the premium paid is added to the cost of the security or financial instrument purchased.  Upon the exercise or closing of a purchased put option, the premium paid is offset against the proceeds on the sale of the underlying security or financial instrument in order to determine the realized gain or loss on investments.

Whether or not the option is exercised, the fund's maximum risk of loss from purchasing an option is the amount of premium paid.  All option contracts involve credit risk if the counterparty to the option contract fails to perform. For uncleared options, this risk is mitigated in cases where there is an ISDA Master Agreement between the fund and the counterparty providing for netting as described above and, where applicable, by the posting of collateral by the counterparty to the fund to cover the fund’s exposure to the counterparty under such ISDA Master Agreement.

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.

Swap Agreements — The fund entered into swap agreements which generally involve a periodic exchange of cash payments on a net basis, at specified intervals or upon the occurrence of specified events, between the fund and a counterparty. Certain swap agreements may be entered into as a bilateral contract (“uncleared swaps”) while others are required to be centrally cleared (“cleared swaps”). 

Both cleared and uncleared swap agreements are marked to market daily.  The value of uncleared swap agreements is reported in the Statement of Assets and Liabilities as “Uncleared swaps, at value” which includes any related interest accruals to be paid or received by the fund.  For cleared swaps, payments (variation margin) are made or received by the fund each day, depending on the daily fluctuations in the value of the cleared swap, such that only the current day net receivable or payable for variation margin is reported in the Statement of Assets and Liabilities.

For both cleared and uncleared swaps, premiums paid or received at the inception of the agreements are amortized over the term of the agreement as realized gain or loss on swap agreements in the Statement of Operations. The periodic exchange of net cash payments, as well as any liquidation payment received or made upon early termination, are recorded as a realized gain or loss on swap agreements in the Statement of Operations. The change in unrealized appreciation or depreciation on swap agreements in the Statement of Operations reflects the aggregate change over the reporting period in the value of swaps net of any unamortized premiums paid or received.

21


MFS Government Securities Fund

Notes to Financial Statements (unaudited) - continued 

Risks related to swap agreements include the possible lack of a liquid market, unfavorable market and interest rate movements of the underlying instrument and the failure of the counterparty to perform under the terms of the agreements. The fund's maximum risk of loss from counterparty credit risk is the discounted net value of the cash flows to be received from/paid to the counterparty over the contract's remaining life, to the extent that the amount is positive. To address counterparty risk, uncleared swap agreements are limited to only highly-rated counterparties.  Risk is further reduced by having an ISDA Master Agreement (“ISDA”) between the fund and the counterparty and, where applicable, by the posting of collateral by the counterparty to the fund to cover the fund’s exposure to the counterparty under such ISDA. The fund's counterparty risk due to cleared swaps is mitigated by the fact that the clearinghouse is the counterparty to the transaction and the regulatory requirement safeguards in the event of a clearing broker bankruptcy.

The fund entered into interest rate swap agreements in order to manage its exposure to interest rate fluctuations.  Interest rate swap agreements involve the periodic exchange of cash flows, between the fund and a counterparty, based on the difference between two interest rates applied to a notional principal amount. The two interest rates exchanged may either be a fixed rate and a floating rate or two floating rates based on different indices.

The fund entered into inflation swap agreements in order to manage its exposure to inflation risk.  Inflation swap agreements involve the periodic exchange of cash flows, between the fund and a counterparty, based on the difference between two rates applied to a notional principal amount. The two rates exchanged are generally a fixed rate and a floating rate based on an inflation index.

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. As such, these transactions may result in an increase to the fund’s portfolio turnover rate. Portfolio turnover rates including and excluding TBA transactions are presented in the Financial Highlights. 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.

22


MFS Government Securities Fund

Notes to Financial Statements (unaudited) - continued 

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.

Fees Paid Indirectly — The fund's custody fee may be reduced by a credit earned under an arrangement that measures the value of U.S. dollars deposited with the custodian by the fund. The amount of the credit, for the six months ended August 31, 2026, is shown as a reduction of total expenses in the Statement of Operations.

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, wash sale loss deferrals, and derivative transactions.

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)

$73,481,884

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

As of 8/31/26

Cost of investments

$2,053,886,540

Gross appreciation

1,935,498

Gross depreciation

(113,871,416

)

Net unrealized appreciation (depreciation)

$(111,935,918

)

As of 2/28/26

Undistributed ordinary income

10,906,216

Capital loss carryforwards

(301,851,066

)

Other temporary differences

(6,155,092

)

Net unrealized appreciation (depreciation)

(60,029,230

)

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

23


MFS Government Securities Fund

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

$(107,244,460

)

Long-Term

(194,606,606

)

Total

$(301,851,066

)

Multiple Classes of Shares of Beneficial Interest — The fund offers multiple classes of shares, which differ in their respective distribution and service fees. The fund's income and common expenses are allocated to shareholders based on the value of settled shares outstanding of each class. The fund's realized and unrealized gain (loss) are allocated to shareholders based on the daily net assets of each class. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B and Class C shares will convert to Class A shares approximately eight years after purchase. The fund’s distributions declared to shareholders as reported in the Statements of Changes in Net Assets are presented by class as follows: 

Six months ended

8/31/26

Year ended

2/28/26

Class A

$5,572,199

$12,066,291

Class B

2,509

10,898

Class C

50,881

84,121

Class I

4,727,561

9,080,755

Class R1

8,242

24,753

Class R2

554,355

1,140,087

Class R3

276,093

646,441

Class R4

453,006

903,396

Class R6

25,836,851

49,525,142

Total

$37,481,697

$73,481,884

(3) Transactions with Affiliates

Investment Adviser — The fund has an investment advisory 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 the following annual rates based on the fund's average daily net assets: 

Up to $1 billion

0.40%

In excess of $1 billion and up to $2.5 billion

0.35%

In excess of $2.5 billion and up to $5 billion

0.30%

In excess of $5 billion

0.29%

MFS has agreed in writing to reduce its management fee by a specified amount if certain MFS mutual fund assets exceed thresholds agreed to by MFS and the fund's Board of Trustees. MFS has also agreed in writing to waive at least 0.01% of its management fee as part of this agreement. The agreement to waive at least 0.01% of the management fee will continue until modified by the fund's Board of Trustees, but such agreement will continue at least until June 30, 2027. For the six months ended August 31, 2026, this management fee reduction amounted to $135,137, which is included in the reduction of total expenses in the Statement of Operations. The management fee incurred for the six months ended August 31, 2026 was equivalent to an annual effective rate of 0.36% of the fund's average daily net assets.

The investment adviser has agreed in writing to pay a portion of the fund’s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses, such that total fund operating expenses do not exceed the following rates annually of each class’s average daily net assets: 

Classes

A

B

C

I

R1

R2

R3

R4

R6

0.80%

1.55%

1.55%

0.55%

1.55%

1.05%

0.80%

0.55%

0.44%

24


MFS Government Securities Fund

Notes to Financial Statements (unaudited) - continued 

This written agreement will continue until modified by the fund’s Board of Trustees, but such agreement will continue at least until June 30, 2028. For the six months ended August 31, 2026, the fund’s actual operating expenses did not exceed the limit and therefore, the investment adviser did not pay any portion of the fund’s expenses related to this agreement.

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $869 for the six months ended August 31, 2026, as its portion of the initial sales charge on sales of Class A shares of the fund.

The Board of Trustees has adopted a distribution plan for certain share classes pursuant to Rule 12b-1 of the Investment Company Act of 1940.

The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. The distribution and service fees are computed daily and paid monthly.

Distribution Plan Fee Table: 

Distribution

Fee Rate (d)

Service

Fee Rate (d)

Total

Distribution

Plan (d)

Annual

Effective

Rate (e)

Distribution

and Service

Fee

Class A

—

0.25%

0.25%

0.25%

$389,424

Class B

0.75%

0.25%

1.00%

1.00%

889

Class C

0.75%

0.25%

1.00%

1.00%

17,952

Class R1

0.75%

0.25%

1.00%

1.00%

2,933

Class R2

0.25%

0.25%

0.50%

0.50%

83,237

Class R3

—

0.25%

0.25%

0.25%

19,309

Total Distribution and Service Fees

$513,744

(d)

 In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees equal to these annual percentage rates of each

class’s average daily net assets. The distribution and service fee rates disclosed by class represent the current rates in effect at the end of the reporting

period. Any rate changes, if applicable, are detailed below.

(e)

 The annual effective rates represent actual fees incurred under the distribution plan for the six months ended August 31, 2026 based on each class's average daily net assets.  MFD has voluntarily agreed to rebate a portion of each class's 0.25% service fee attributable to accounts for which there is no financial intermediary specified on the account except for accounts attributable to MFS or its affiliates' seed money. For the six months ended August 31, 2026, this rebate amounted to $266 for Class A shares and is included in the reduction of total expenses in the Statement of Operations.

Certain Class A shares are subject to a contingent deferred sales charge (CDSC) in the event of a shareholder redemption within 18 months of purchase. Class B shares are subject to a CDSC in the event of a shareholder redemption within six years of purchase. Class C shares are subject to a CDSC in the event of a shareholder redemption within 12 months of purchase. All contingent deferred sales charges are paid to MFD and during the six months ended August 31, 2026, were as follows: 

Amount

Class A

$6,179

Class B

—

Class C

1,541

Shareholder Servicing Agent — MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average daily net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the six months ended August 31, 2026, the fee was $146,473, which equated to 0.0150% annually of the fund's average daily net assets. MFSC also receives reimbursement from the fund for out-of-pocket expenses, sub-accounting and other shareholder servicing costs which may be paid to affiliated and unaffiliated service providers. Class R6 shares do not incur sub-accounting fees. For the six months ended August 31, 2026, these out-of-pocket expenses, sub-accounting and other shareholder servicing costs amounted to $332,198.

Administrator — MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund. Under an administrative services agreement, the fund reimburses MFS the costs incurred to provide these services. The fund is charged an annual fixed amount of $17,500 plus a fee based on average daily net assets. The administrative services fee is computed daily and paid monthly. The administrative services fee incurred for the six months ended August 31, 2026 was equivalent to an annual effective rate of 0.0140% of the fund's average daily net assets.

25


MFS Government Securities Fund

Notes to Financial Statements (unaudited) - continued 

Trustees’ and Officers’ Compensation — The fund pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. Independent Trustees’ compensation is accrued daily and paid subsequent to each Trustee Board meeting. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration from MFS for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC.

Other — The fund invests in the MFS Institutional Money Market Portfolio which is managed by MFS and seeks current income consistent with preservation of capital and liquidity. This money market fund does not pay a management fee to MFS but does incur investment and operating costs.

(4) Portfolio Securities

For the six months ended August 31, 2026, purchases and sales of investments, other than short-term obligations and purchased options with an expiration date of less than one year from the time of purchase, were as follows: 

Purchases

Sales

U.S. Government securities

$1,635,480,362

$1,811,475,020

Non-U.S. Government securities

34,292,589

28,214,754

(5) Shares of Beneficial Interest

The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows: 

Six months ended

8/31/26

Year ended

2/28/26

Shares

Amount

Shares

Amount

Shares sold

Class A

1,388,947

$11,901,845

3,174,979

$27,520,732

Class B

—

—

348

3,000

Class C

117,682

1,008,831

147,840

1,285,276

Class I

3,004,049

25,704,129

7,812,761

67,567,470

Class R1

8,509

72,667

8,752

75,939

Class R2

499,359

4,285,839

1,046,448

9,049,571

Class R3

275,482

2,365,583

542,563

4,707,927

Class R4

282,629

2,425,667

692,543

5,999,314

Class R6

4,924,798

42,096,341

17,467,031

151,179,531

10,501,455

$89,860,902

30,893,265

$267,388,760

Shares issued to shareholders

in reinvestment of distributions

Class A

624,517

$5,338,798

1,332,266

$11,571,999

Class B

293

2,509

1,249

10,821

Class C

5,935

50,815

9,624

83,804

Class I

545,553

4,656,061

1,029,697

8,934,877

Class R1

971

8,242

2,853

24,753

Class R2

64,858

553,760

131,285

1,139,017

Class R3

32,240

275,610

74,448

646,441

Class R4

11,595

99,177

25,894

224,885

Class R6

2,980,372

25,442,877

5,577,099

48,401,072

4,266,334

$36,427,849

8,184,415

$71,037,669

26


MFS Government Securities Fund

Notes to Financial Statements (unaudited) - continued 

Six months ended

8/31/26

Year ended

2/28/26

Shares

Amount

Shares

Amount

Shares reacquired

Class A

(4,465,124

)

$(38,317,396

)

(9,523,965

)

$(82,561,643

)

Class B

(10,804

)

(92,774

)

(36,960

)

(319,576

)

Class C

(80,750

)

(692,849

)

(102,535

)

(888,506

)

Class I

(3,783,579

)

(32,534,467

)

(6,766,118

)

(58,621,561

)

Class R1

(28,258

)

(245,795

)

(96,552

)

(834,095

)

Class R2

(530,648

)

(4,538,402

)

(1,666,971

)

(14,441,012

)

Class R3

(555,659

)

(4,769,763

)

(1,010,374

)

(8,780,997

)

Class R4

(447,216

)

(3,822,078

)

(607,633

)

(5,262,957

)

Class R6

(6,852,208

)

(58,879,681

)

(21,616,306

)

(187,031,863

)

(16,754,246

)

$(143,893,205

)

(41,427,414

)

$(358,742,210

)

Net change

Class A

(2,451,660

)

$(21,076,753

)

(5,016,720

)

$(43,468,912

)

Class B

(10,511

)

(90,265

)

(35,363

)

(305,755

)

Class C

42,867

366,797

54,929

480,574

Class I

(233,977

)

(2,174,277

)

2,076,340

17,880,786

Class R1

(18,778

)

(164,886

)

(84,947

)

(733,403

)

Class R2

33,569

301,197

(489,238

)

(4,252,424

)

Class R3

(247,937

)

(2,128,570

)

(393,363

)

(3,426,629

)

Class R4

(152,992

)

(1,297,234

)

110,804

961,242

Class R6

1,052,962

8,659,537

1,427,824

12,548,740

(1,986,457

)

$(17,604,454

)

(2,349,734

)

$(20,315,781

)

The fund is one of several mutual funds in which certain MFS funds may invest. The MFS funds do not invest in the underlying funds for the purpose of exercising management or control. At the end of the period, the MFS Moderate Allocation Fund, the MFS Conservative Allocation Fund, the MFS Lifetime Income Fund, the MFS Lifetime 2030 Fund, and the MFS Lifetime 2035 Fund were the owners of record of approximately 33%, 18%, 4%, 3%, and 3%, respectively, of the value of outstanding voting shares of the fund. In addition, the MFS Lifetime 2040 Fund was the owner of record of less than 1% of the value of outstanding voting shares of the fund.

Effective June 1, 2019, purchases of the fund’s Class B shares were closed to new and existing investors subject to certain exceptions. Effective September 29, 2023, purchases of the fund's Class R1 and Class R2 shares were closed to new eligible investors.

(6) Line of Credit

The fund and certain other funds managed by MFS participate in a $1.45 billion unsecured committed line of credit of which $1.2 billion is reserved for use by the fund and certain other MFS U.S. funds. The line of credit is provided by a syndicate of banks under a credit agreement. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the highest of 1) Daily Simple SOFR (Secured Overnight Financing Rate), 2) the Federal Funds Effective Rate, or 3) the Overnight Bank Funding Rate, each plus an agreed upon spread. A commitment fee, based on the average daily unused portion of the committed line of credit, is allocated among the participating funds. The line of credit expires on March 11, 2027 unless extended or renewed. In addition, the fund and other funds managed by MFS have established unsecured uncommitted borrowing arrangements with certain banks for temporary financing needs. Interest is charged to each fund, based on its borrowings, at rates equal to customary reference rates plus an agreed upon spread. For the six months ended August 31, 2026, the fund’s commitment fee and interest expense were $4,696 and $0, respectively, and are included in “Miscellaneous” expense in the Statement of Operations.

(7) Investments in Affiliated Issuers

An affiliated issuer may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. The following were affiliated issuers for the six months ended August 31, 2026: 

27


MFS Government Securities Fund

Notes to Financial Statements (unaudited) - continued 

Affiliated Issuers

Beginning

Value

Purchases

Sales

Proceeds

Realized

Gain

(Loss)

Change in

Unrealized

Appreciation

or

Depreciation

Ending

Value

MFS Institutional Money Market Portfolio

$66,351,406

$734,562,721

$641,024,358

$15,725

$2,978

$159,908,472

Affiliated Issuers

Dividend

Income

Capital Gain

Distributions

MFS Institutional Money Market Portfolio

$1,395,551

$—

28


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

There is nothing to report for this item for MFS Government Securities Fund.

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

There is nothing to report for this item for MFS Government Securities Fund.

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 Government Securities Fund. 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.

29


MFS Government Securities Fund

Board Review of Investment Advisory Agreement

MFS Government Securities Fund 

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 advisory 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 advisory 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 advisory 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 advisory 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 advisory 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 advisory agreement and other arrangements with the Fund.

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 various time periods 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 advisory fees and other expenses 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 and other clients, (iv) information as to whether and to what extent applicable expense waivers, reimbursements or fee “breakpoints” are observed for the Fund, (v) 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, (vi) MFS’ views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vii) descriptions of various functions performed by MFS for the Funds, such as compliance monitoring and portfolio trading practices, and (viii) 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 advisory 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 various time periods.  The Trustees placed particular emphasis on the total return performance of the Fund’s Class I shares in comparison to the performance of funds in its Broadridge performance universe over the five-year period ended December 31, 2025, which the Trustees believed was a long enough period to reflect differing market conditions.  The total return performance of the Fund’s Class I shares was in the 2nd quintile relative to the other funds in the universe for this five-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers).  The total return performance of the Fund’s Class I shares was in the 3rd quintile for each of the one- and three-year periods ended December 31, 2025 relative to the Broadridge performance universe.  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.

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 advisory agreement, that they were satisfied with MFS’ responses and efforts relating to investment performance.

30


MFS Government Securities Fund

Board Review of Investment Advisory Agreement - continued

In assessing the reasonableness of the Fund’s advisory fee, the Trustees considered, among other information, the Fund’s advisory fee and the total expense ratio of the Fund’s Class I shares as a percentage of average daily net assets and the advisory fee and total expense ratios of the Broadridge expense group based on information provided by Broadridge.  The Trustees considered that MFS currently observes an expense limitation for the Fund, which may not be changed without the Trustees’ approval.  The Trustees also considered that, according to the data provided by Broadridge (which takes into account any fee reductions or expense limitations that were in effect during the Fund’s last fiscal year), the Fund’s effective advisory fee rate was higher than the Broadridge expense group median and the Fund’s total expense ratio was approximately at the 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 also considered whether the Fund may benefit from any economies of scale in the management of the Fund in the event of growth in assets of the Fund and/or growth in assets of the MFS Funds as a whole.  They noted that the Fund’s advisory fee rate schedule is subject to contractual breakpoints that reduce the Fund’s advisory fee rate on average daily net assets over $1 billion, $2.5 billion, and $5 billion.  The Trustees also noted that MFS has agreed in writing to waive a portion of the management fees of certain MFS Funds, including the Fund, if the total combined assets of certain funds within the MFS Funds’ complex increase above agreed upon thresholds (the “group fee waiver”), enabling the Fund’s shareholders to share in the benefits from any economies of scale at the complex level.  The group fee waiver is reviewed and renewed annually between the Board and MFS.  The Trustees concluded that the breakpoints and the group fee waiver were sufficient to allow the Fund to benefit from economies of scale as its assets and overall complex assets grow.

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 advisory agreement, that the advisory fees charged to the Fund represent 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 advisory agreement, including any 12b-1 fees the Fund pays to MFS Fund Distributors, Inc., an affiliate of MFS.  The Trustees also considered the nature, extent and quality of certain other services MFS performs or arranges 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 advisory agreement with MFS should be continued for an additional one-year period, commencing August 1, 2026.

31


MFS New Discovery Value Fund

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

MFS New Discovery Value Fund

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 – 1.7%

Applied Aerospace & Defense, Inc. (a)

687,765

$9,078,498

Ducommun, Inc. (a)

59,693

10,232,574

Mirion Technologies, Inc. (a)

558,557

8,417,454

Parsons Corp. (a)

241,030

11,723,699

$39,452,225

Apparel, Footwear, & Accessories – 0.9%

Columbia Sportswear Co.

172,624

$9,908,617

Wolverine World Wide, Inc.

496,886

9,803,561

$19,712,178

Auto & Auto Components – 2.1%

Atmus Filtration Technologies, Inc.

243,512

$11,501,072

Goodyear Tire & Rubber Co. (a)

1,107,519

6,944,144

Group 1 Automotive, Inc.

56,071

15,113,377

Visteon Corp.

154,385

15,719,481

$49,278,074

Brokerage & Asset Managers – 1.2%

Lincoln International, Inc.

480,140

$12,118,733

Ridgepost Capital, Inc.

1,766,968

15,195,925

$27,314,658

Business Services – 0.6%

Morningstar, Inc.

63,440

$13,889,554

Chemicals – 3.4%

Ashland, Inc.

62,265

$4,565,893

Avient Corp.

516,989

22,778,535

CSW Industrials, Inc.

21,894

6,764,151

Element Solutions, Inc.

629,290

22,364,967

Quaker Chemical Corp.

127,093

21,072,019

$77,545,565

Construction – 3.6%

Independence Realty Trust, Inc., REIT

1,274,505

$20,621,491

M/I Homes, Inc. (a)

171,791

25,564,219

Meritage Homes Corp.

184,724

12,825,387

SiteOne Landscape Supply, Inc. (a)

186,642

18,389,836

Suncrete, Inc., “A” (a)(l)

291,752

5,003,547

$82,404,480

Consumer Products – 0.9%

Prestige Consumer Healthcare, Inc. (a)

402,158

$20,823,741

NDVFS-SEM

1


MFS New Discovery Value Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Consumer Services – 1.8%

Grand Canyon Education, Inc. (a)

95,332

$14,121,529

Life Time Group Holdings, Inc. (a)

461,073

19,374,287

Phoenix Educations Partners, Inc.

275,898

8,031,391

$41,527,207

Containers – 0.6%

Silgan Holdings, Inc.

319,325

$13,264,761

Diversified Financial Services – 1.7%

Bullish (a)(l)

304,332

$10,356,418

Riot Platforms, Inc. (a)

733,797

13,938,474

SLM Corp.

609,355

15,824,949

$40,119,841

Electrical Equipment – 2.4%

Belden, Inc.

128,358

$14,691,857

Itron, Inc. (a)

99,535

9,655,890

TriMas Corp.

327,933

12,717,242

Vontier Corp.

539,172

17,366,730

$54,431,719

Energy - Independent – 5.0%

Antero Resources Corp. (a)

509,181

$19,593,285

California Resources Corp.

301,344

15,980,272

Core Natural Resources, Inc.

139,966

14,318,522

Matador Resources Co.

351,339

20,381,175

Peabody Energy Corp.

401,175

11,910,886

Permian Resources Corp.

934,203

21,757,588

Viper Energy, Inc., “A”

224,218

10,042,724

$113,984,452

Energy - Renewables – 0.2%

Fuelcell Energy, Inc. (a)

251,637

$4,335,706

Entertainment & Leisure – 1.3%

Brunswick Corp.

180,792

$13,722,113

Patrick Industries, Inc.

184,161

15,049,637

$28,771,750

Food & Beverages – 0.7%

Nomad Foods Ltd.

1,379,044

$16,052,072

Forest & Paper Products – 0.3%

International Paper Co.

194,522

$7,378,220

Hardware, Peripherals, & Assembly – 2.1%

Core Scientific, Inc. (a)

319,421

$5,206,562

Digi International, Inc. (a)

312,428

23,413,354

Insight Enterprises, Inc. (a)

129,275

20,298,761

$48,918,677

2


MFS New Discovery Value Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Insurance – 3.8%

AXIS Capital Holdings Ltd.

160,897

$15,893,406

Hanover Insurance Group, Inc.

72,098

16,302,079

Lincoln National Corp.

441,316

18,795,649

Selective Insurance Group, Inc.

247,108

22,558,489

Stewart Information Services Corp.

197,136

13,533,386

$87,083,009

Machinery & Tools – 5.5%

Albany International Corp.

209,274

$11,600,058

Alliance Laundry Holdings, Inc. (a)

567,188

12,994,277

ESAB Corp.

212,599

16,025,713

Hayward Holdings, Inc. (a)

1,166,267

16,386,051

Hillman Solutions Corp. (a)

1,957,775

15,074,867

Kadant, Inc.

55,607

16,634,278

Terex Corp.

300,575

19,089,518

Timken Co.

149,486

18,005,589

$125,810,351

Media – 0.8%

Nexstar Media Group, Inc.

102,601

$18,686,720

Medical & Health Technology & Services – 3.5%

Azenta, Inc. (a)

439,706

$14,356,401

Lumexa Imaging Holdings, Inc. (a)

1,570,758

18,330,746

Minimed Group, Inc. (a)(l)

888,545

18,001,922

Option Care Health, Inc. (a)

499,009

11,701,761

Waystar Holding Corp. (a)

655,013

17,148,240

$79,539,070

Medical Equipment – 3.2%

Concentra Group Holdings, Inc.

618,926

$20,882,563

Envista Holdings Corp. (a)

565,525

15,348,349

Merit Medical Systems, Inc. (a)

193,022

17,499,375

UFP Technologies, Inc. (a)

63,137

18,811,669

$72,541,956

Metals & Mining – 1.0%

SSR Mining, Inc.

635,453

$23,899,387

Natural Gas - Pipeline – 1.4%

Plains GP Holdings LP

1,137,780

$32,108,152

Network & Telecom – 1.0%

Viasat, Inc. (a)

326,900

$21,990,563

Non-Global Systemically Important Banks – 18.2%

BancFirst Corp.

158,155

$17,273,689

Beacon Financial Corp.

568,462

17,650,745

Cathay General Bancorp, Inc.

471,043

28,832,542

Central Banco, Inc.

700,733

22,497,033

Columbia Banking System, Inc.

893,981

26,497,597

Community Financial System, “I”

271,348

17,027,087

CVB Financial Corp.

1,184,854

26,268,213

3


MFS New Discovery Value Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Non-Global Systemically Important Banks – continued

East West Bancorp, Inc.

131,111

$16,632,742

Eastern Bankshares, Inc.

1,105,031

24,266,481

First Hawaiian, Inc.

955,971

24,482,417

First Interstate BancSystem, Inc.

732,962

26,980,331

Hancock Whitney Corp.

364,206

27,129,705

Popular, Inc.

147,903

24,875,806

Prosperity Bancshares, Inc.

393,681

28,171,812

Simmons First National Corp.

744,962

16,821,242

Texas Capital Bancshares, Inc.

208,980

20,308,676

UMB Financial Corp.

160,930

22,792,516

United Community Bank, Inc.

812,505

28,307,674

$416,816,308

Oil Services – 1.6%

Expro Ltd. (a)

1,239,970

$22,468,257

Noble Corp. PLC

308,435

14,135,576

$36,603,833

Pharmaceuticals & Biotechnology – 5.3%

ACADIA Pharmaceuticals, Inc. (a)

480,195

$13,882,437

Cogent Biosciences, Inc. (a)

244,840

8,569,400

Collegium Pharmaceutical, Inc. (a)

354,483

8,723,827

Cytokinetics, Inc. (a)

143,763

10,194,234

Ionis Pharmaceuticals, Inc. (a)

162,362

9,800,170

Ligand Pharmaceuticals, Inc. (a)

81,704

23,212,106

Mirum Pharmaceuticals, Inc. (a)

153,297

15,030,771

Oruka Therapeutics, Inc. (a)

108,967

10,092,524

Praxis Precision Medicines, Inc. (a)

30,105

10,545,782

Tarsus Pharmaceuticals, Inc. (a)

144,421

10,721,815

$120,773,066

Pollution Control – 1.1%

GFL Environmental, Inc.

578,878

$24,480,751

Real Estate – 5.0%

Acadia Realty Trust, REIT

910,076

$18,629,256

Cushman & Wakefield Ltd. (a)

962,665

12,986,351

Essential Properties Realty Trust, REIT

657,097

19,712,910

Four Corners Property Trust, Inc., REIT

566,864

14,103,576

Janus Living, Inc., “A”, REIT

746,869

22,219,353

PennyMac Financial Services, Inc.

154,893

11,324,227

Urban Edge Properties, REIT

741,128

15,682,268

$114,657,941

Real Estate - Storage & Office – 2.1%

Cousins Properties, Inc., REIT

629,921

$18,261,410

Rexford Industrial Realty, Inc., REIT

412,068

15,262,999

SmartStop Self Storage REIT

433,469

14,074,738

$47,599,147

Restaurants – 0.8%

Chefs' Warehouse, Inc. (a)

162,457

$18,271,539

4


MFS New Discovery Value Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Common Stocks – continued

Retail & E-commerce – 2.2%

Bob's Discount Furniture (a)

791,305

$13,317,663

Ollie's Bargain Outlet Holdings, Inc. (a)

113,420

8,554,136

Rush Enterprises, Inc., “A”

188,174

14,457,409

Yesway, Inc. (a)

522,162

13,007,055

$49,336,263

Semiconductor & Electronic Components – 1.9%

Advanced Energy Industries, Inc.

46,469

$12,865,407

Benchmark Electronics, Inc.

32,622

2,292,674

Sanmina Corp. (a)

71,170

14,000,563

Synaptics, Inc. (a)

105,342

10,188,678

Wolfspeed, Inc. (a)

117,883

3,229,994

$42,577,316

Software – 1.3%

ACI Worldwide, Inc. (a)

297,766

$15,864,973

nCino, Inc. (a)

599,582

13,550,553

$29,415,526

Telecom - Infrastructure – 0.5%

Blackstone Digital Infrastructure Trust, Inc., REIT (a)

569,329

$11,420,740

Telecom Services – 0.3%

EchoStar Corp., “A” (a)

80,391

$6,948,998

Transportation & Logistics – 1.1%

ArcBest Corp.

72,876

$10,054,702

Kirby Corp. (a)

99,988

14,184,297

$24,238,999

Travel, Gaming, & Lodging – 1.5%

Alaska Air Group, Inc. (a)

236,513

$9,775,082

Brightstar Lottery PLC

971,073

10,943,993

Wyndham Hotels & Resorts, Inc.

188,940

13,917,320

$34,636,395

Utilities – 6.1%

Brookfield Infrastructure Corp. (l)

328,591

$12,558,748

MDU Resources Group, Inc.

490,790

9,776,537

NorthWestern Corp.

310,531

21,476,324

ONE Gas, Inc.

223,277

17,699,168

Portland General Electric Co.

478,037

23,356,888

Southwest Gas Holdings, Inc.

237,491

20,977,580

Spire, Inc.

247,814

20,281,097

UGI Corp.

364,044

13,997,492

$140,123,834

Total Common Stocks (Identified Cost, $1,881,169,275)

$2,278,764,744

Mutual Funds (h) – 0.6%

Money Market Funds – 0.6%

MFS Institutional Money Market Portfolio, 3.75% (v) (Identified Cost, $13,576,554)

13,575,197

$13,576,554

5


MFS New Discovery Value Fund

Portfolio of Investments (unaudited) – continued

Issuer

Shares/Par

Value ($)

Collateral for Securities Loaned – 1.8%

JPMorgan U.S. Government Money Market Fund - Class IM Shares, 3.62% (j) (Identified Cost, $42,249,413)

42,249,413

$42,249,413

Other Assets, Less Liabilities – (2.1)%

(48,749,347)

Net Assets – 100.0%

$2,285,841,364

(a)

Non-income producing security.

(h)

An affiliated issuer, which may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under

common control. At period end, the aggregate values of the fund's investments in affiliated issuers and in unaffiliated issuers were $13,576,554 and

$2,321,014,157, respectively.

(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.

(v)

Affiliated issuer that is available only to investment companies managed by MFS. The rate quoted for the MFS Institutional Money Market Portfolio 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

6


MFS New Discovery Value Fund

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 $41,329,483 of securities on loan (identified cost, $1,923,418,688)

$2,321,014,157

Investments in affiliated issuers, at value (identified cost, $13,576,554)

13,576,554

Receivables for

Investments sold

8,552,404

Fund shares sold

858,493

Interest and dividends

2,205,327

Other assets

57,247

Total assets

$2,346,264,182

Liabilities

Payables for

Investments purchased

$12,652,631

Fund shares reacquired

4,760,818

Collateral for securities loaned, at value

42,249,413

Payable to affiliates

Investment adviser

210,591

Administrative services fee

3,539

Shareholder servicing costs

339,529

Distribution and service fees

9,093

Accrued expenses and other liabilities

197,204

Total liabilities

$60,422,818

Net assets

$2,285,841,364

Net assets consist of

Paid-in capital

$1,595,665,155

Total distributable earnings (loss)

690,176,209

Net assets

$2,285,841,364

Shares of beneficial interest outstanding

123,108,872

Net assets

Shares

outstanding

Net asset value

per share (a)

Class A

$241,242,585

13,186,226

$18.30

Class B

180,642

10,798

16.73

Class C

6,610,978

399,958

16.53

Class I

655,946,522

35,344,641

18.56

Class R1

2,125,519

128,127

16.59

Class R2

3,739,733

207,594

18.01

Class R3

42,245,481

2,302,059

18.35

Class R4

53,622,412

2,882,878

18.60

Class R6

1,280,127,492

68,646,591

18.65

(a)

Maximum offering price per share was equal to the net asset value per share for all share classes, except for Class A, for which the maximum

offering price per share was $19.42 [100 / 94.25 x $18.30]. On sales of $50,000 or more, the maximum offering price of Class A shares is

reduced. A contingent deferred sales charge may be imposed on redemptions of Class A, Class B, and Class C shares. Redemption price per

share was equal to the net asset value per share for Classes I, R1, R2, R3, R4, and R6.

See Notes to Financial Statements

7


MFS New Discovery Value Fund

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

$23,249,705

Dividends from affiliated issuers

424,571

Income on securities loaned

176,046

Other

153,778

Foreign taxes withheld

(102,728

)

Total investment income

$23,901,372

Expenses

Management fee

$10,480,546

Distribution and service fees

566,127

Shareholder servicing costs

664,175

Administrative services fee

173,594

Independent Trustees' compensation

25,823

Custodian fee

60,479

Shareholder communications

96,585

Audit and tax fees

36,785

Legal fees

6,479

Miscellaneous

127,053

Total expenses

$12,237,646

Reduction of expenses by investment adviser and distributor

(172,805

)

Net expenses

$12,064,841

Net investment income (loss)

$11,836,531

Realized and unrealized gain (loss)

Realized gain (loss) (identified cost basis)

Unaffiliated issuers

$314,206,781

Affiliated issuers

5,286

Foreign currency

(584

)

Net realized gain (loss)

$314,211,483

Change in unrealized appreciation or depreciation

Unaffiliated issuers

$(184,384,846

)

Net realized and unrealized gain (loss)

$129,826,637

Change in net assets from operations

$141,663,168

See Notes to Financial Statements

8


MFS New Discovery Value Fund

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)

$11,836,531

$27,937,174

Net realized gain (loss)

314,211,483

264,358,834

Net unrealized gain (loss)

(184,384,846

)

(19,760,788

)

Change in net assets from operations

$141,663,168

$272,535,220

Total distributions to shareholders

$(77,931,713

)

$(271,323,939

)

Change in net assets from fund share transactions

$(515,248,937

)

$(482,146,563

)

Total change in net assets

$(451,517,482

)

$(480,935,282

)

Net assets

At beginning of period

2,737,358,846

3,218,294,128

At end of period

$2,285,841,364

$2,737,358,846

See Notes to Financial Statements

9


MFS New Discovery Value Fund

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. 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 share class (assuming reinvestment of all distributions) held for the entire period. 

Class A 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$17.91

$17.90

$17.28

$18.03

$20.03

$18.53

Income (loss) from investment operations

Net investment income (loss) (d)

$0.06

$0.13

$0.19

$0.16

$0.12

$0.05

Net realized and unrealized gain (loss)

0.97

1.65

1.58

0.15

(0.77

)

3.32

Total from investment operations

$1.03

$1.78

$1.77

$0.31

$(0.65

)

$3.37

Less distributions declared to shareholders

From net investment income

$—

$(0.19

)

$(0.29

)

$(0.18

)

$(0.23

)

$(0.15

)

From net realized gain

(0.64

)

(1.58

)

(0.86

)

(0.88

)

(1.12

)

(1.72

)

Total distributions declared to shareholders

$(0.64

)

$(1.77

)

$(1.15

)

$(1.06

)

$(1.35

)

$(1.87

)

Net asset value, end of period (x)

$18.30

$17.91

$17.90

$17.28

$18.03

$20.03

Total return (%) (r)(s)(t)(x)

5.75

(n)

10.86

9.88

1.96

(2.88

)

18.34

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions

1.24

(a)

1.23

1.21

1.20

1.20

1.19

Expenses after expense reductions

1.23

(a)

1.21

1.19

1.19

1.18

1.18

Net investment income (loss)

0.69

(a)

0.75

1.05

0.98

0.65

0.25

Portfolio turnover rate

31

(n)

47

34

34

30

44

Net assets at end of period (000 omitted)

$241,243

$245,209

$268,230

$275,255

$306,254

$361,165

See Notes to Financial Statements

10


MFS New Discovery Value Fund

Financial Highlights - continued

Class B 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$16.49

$16.59

$16.07

$16.83

$18.77

$17.54

Income (loss) from investment operations

Net investment income (loss) (d)

$0.00

(w)

$0.01

$0.06

$0.04

$(0.01

)

$(0.09

)

Net realized and unrealized gain (loss)

0.88

1.50

1.45

0.12

(0.73

)

3.13

Total from investment operations

$0.88

$1.51

$1.51

$0.16

$(0.74

)

$3.04

Less distributions declared to shareholders

From net investment income

$—

$(0.03

)

$(0.13

)

$(0.04

)

$(0.08

)

$(0.09

)

From net realized gain

(0.64

)

(1.58

)

(0.86

)

(0.88

)

(1.12

)

(1.72

)

Total distributions declared to shareholders

$(0.64

)

$(1.61

)

$(0.99

)

$(0.92

)

$(1.20

)

$(1.81

)

Net asset value, end of period (x)

$16.73

$16.49

$16.59

$16.07

$16.83

$18.77

Total return (%) (r)(s)(t)(x)

5.33

(n)

10.02

9.04

1.21

(3.61

)

17.45

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions

1.99

(a)

1.98

1.96

1.95

1.95

1.94

Expenses after expense reductions

1.97

(a)

1.96

1.94

1.94

1.93

1.93

Net investment income (loss)

0.01

(a)

0.07

0.35

0.23

(0.09

)

(0.49

)

Portfolio turnover rate

31

(n)

47

34

34

30

44

Net assets at end of period (000 omitted)

$181

$615

$1,567

$2,834

$4,023

$6,016

Class C 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$16.30

$16.44

$15.94

$16.70

$18.66

$17.45

Income (loss) from investment operations

Net investment income (loss) (d)

$(0.00

)(w)

$0.01

$0.06

$0.04

$(0.02

)

$(0.09

)

Net realized and unrealized gain (loss)

0.87

1.49

1.44

0.13

(0.72

)

3.11

Total from investment operations

$0.87

$1.50

$1.50

$0.17

$(0.74

)

$3.02

Less distributions declared to shareholders

From net investment income

$—

$(0.06

)

$(0.14

)

$(0.05

)

$(0.10

)

$(0.09

)

From net realized gain

(0.64

)

(1.58

)

(0.86

)

(0.88

)

(1.12

)

(1.72

)

Total distributions declared to shareholders

$(0.64

)

$(1.64

)

$(1.00

)

$(0.93

)

$(1.22

)

$(1.81

)

Net asset value, end of period (x)

$16.53

$16.30

$16.44

$15.94

$16.70

$18.66

Total return (%) (r)(s)(t)(x)

5.33

(n)

10.01

9.06

1.24

(3.65

)

17.42

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions

1.99

(a)

1.98

1.96

1.95

1.95

1.94

Expenses after expense reductions

1.98

(a)

1.96

1.94

1.94

1.93

1.93

Net investment income (loss)

(0.05

)(a)

0.03

0.34

0.23

(0.09

)

(0.48

)

Portfolio turnover rate

31

(n)

47

34

34

30

44

Net assets at end of period (000 omitted)

$6,611

$9,047

$14,699

$21,695

$29,474

$37,588

See Notes to Financial Statements

11


MFS New Discovery Value Fund

Financial Highlights - continued

Class I 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$18.13

$18.10

$17.47

$18.20

$20.22

$18.69

Income (loss) from investment operations

Net investment income (loss) (d)

$0.09

$0.18

$0.24

$0.21

$0.16

$0.10

Net realized and unrealized gain (loss)

0.98

1.66

1.59

0.16

(0.78

)

3.35

Total from investment operations

$1.07

$1.84

$1.83

$0.37

$(0.62

)

$3.45

Less distributions declared to shareholders

From net investment income

$—

$(0.23

)

$(0.34

)

$(0.22

)

$(0.28

)

$(0.20

)

From net realized gain

(0.64

)

(1.58

)

(0.86

)

(0.88

)

(1.12

)

(1.72

)

Total distributions declared to shareholders

$(0.64

)

$(1.81

)

$(1.20

)

$(1.10

)

$(1.40

)

$(1.92

)

Net asset value, end of period (x)

$18.56

$18.13

$18.10

$17.47

$18.20

$20.22

Total return (%) (r)(s)(t)(x)

5.90

(n)

11.12

10.08

2.30

(2.70

)

18.64

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions

0.99

(a)

0.98

0.96

0.95

0.95

0.94

Expenses after expense reductions

0.98

(a)

0.96

0.94

0.94

0.93

0.93

Net investment income (loss)

0.94

(a)

1.03

1.31

1.22

0.91

0.46

Portfolio turnover rate

31

(n)

47

34

34

30

44

Net assets at end of period (000 omitted)

$655,947

$832,362

$1,228,722

$1,388,622

$1,604,806

$1,795,671

Class R1 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$16.36

$16.52

$16.03

$16.80

$18.78

$17.55

Income (loss) from investment operations

Net investment income (loss) (d)

$(0.00

)(w)

$(0.00

)(w)

$0.05

$0.04

$(0.01

)

$(0.10

)

Net realized and unrealized gain (loss)

0.87

1.50

1.45

0.13

(0.74

)

3.14

Total from investment operations

$0.87

$1.50

$1.50

$0.17

$(0.75

)

$3.04

Less distributions declared to shareholders

From net investment income

$—

$(0.08

)

$(0.15

)

$(0.06

)

$(0.11

)

$(0.09

)

From net realized gain

(0.64

)

(1.58

)

(0.86

)

(0.88

)

(1.12

)

(1.72

)

Total distributions declared to shareholders

$(0.64

)

$(1.66

)

$(1.01

)

$(0.94

)

$(1.23

)

$(1.81

)

Net asset value, end of period (x)

$16.59

$16.36

$16.52

$16.03

$16.80

$18.78

Total return (%) (r)(s)(t)(x)

5.31

(n)

10.03

9.02

1.27

(3.65

)

17.45

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions

1.99

(a)

1.98

1.96

1.95

1.95

1.94

Expenses after expense reductions

1.98

(a)

1.96

1.95

1.92

1.92

1.93

Net investment income (loss)

(0.06

)(a)

(0.02

)

0.31

0.25

(0.09

)

(0.51

)

Portfolio turnover rate

31

(n)

47

34

34

30

44

Net assets at end of period (000 omitted)

$2,126

$2,115

$1,878

$1,972

$2,196

$2,224

See Notes to Financial Statements

12


MFS New Discovery Value Fund

Financial Highlights - continued

Class R2 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$17.66

$17.68

$17.09

$17.84

$19.84

$18.38

Income (loss) from investment operations

Net investment income (loss) (d)

$0.04

$0.08

$0.15

$0.12

$0.07

$0.01

Net realized and unrealized gain (loss)

0.95

1.63

1.54

0.14

(0.76

)

3.28

Total from investment operations

$0.99

$1.71

$1.69

$0.26

$(0.69

)

$3.29

Less distributions declared to shareholders

From net investment income

$—

$(0.15

)

$(0.24

)

$(0.13

)

$(0.19

)

$(0.11

)

From net realized gain

(0.64

)

(1.58

)

(0.86

)

(0.88

)

(1.12

)

(1.72

)

Total distributions declared to shareholders

$(0.64

)

$(1.73

)

$(1.10

)

$(1.01

)

$(1.31

)

$(1.83

)

Net asset value, end of period (x)

$18.01

$17.66

$17.68

$17.09

$17.84

$19.84

Total return (%) (r)(s)(t)(x)

5.60

(n)

10.57

9.54

1.73

(3.13

)

18.02

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions

1.49

(a)

1.48

1.46

1.45

1.45

1.44

Expenses after expense reductions

1.48

(a)

1.46

1.44

1.44

1.43

1.43

Net investment income (loss)

0.43

(a)

0.49

0.83

0.73

0.40

0.05

Portfolio turnover rate

31

(n)

47

34

34

30

44

Net assets at end of period (000 omitted)

$3,740

$3,868

$3,798

$5,265

$5,677

$6,251

Class R3 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$17.95

$17.94

$17.33

$18.07

$20.08

$18.57

Income (loss) from investment operations

Net investment income (loss) (d)

$0.06

$0.13

$0.19

$0.17

$0.12

$0.05

Net realized and unrealized gain (loss)

0.98

1.65

1.58

0.15

(0.78

)

3.33

Total from investment operations

$1.04

$1.78

$1.77

$0.32

$(0.66

)

$3.38

Less distributions declared to shareholders

From net investment income

$—

$(0.19

)

$(0.30

)

$(0.18

)

$(0.23

)

$(0.15

)

From net realized gain

(0.64

)

(1.58

)

(0.86

)

(0.88

)

(1.12

)

(1.72

)

Total distributions declared to shareholders

$(0.64

)

$(1.77

)

$(1.16

)

$(1.06

)

$(1.35

)

$(1.87

)

Net asset value, end of period (x)

$18.35

$17.95

$17.94

$17.33

$18.07

$20.08

Total return (%) (r)(s)(t)(x)

5.79

(n)

10.84

9.86

2.01

(2.92

)

18.36

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions

1.24

(a)

1.23

1.21

1.20

1.20

1.19

Expenses after expense reductions

1.22

(a)

1.21

1.19

1.19

1.18

1.18

Net investment income (loss)

0.66

(a)

0.74

1.00

0.98

0.65

0.24

Portfolio turnover rate

31

(n)

47

34

34

30

44

Net assets at end of period (000 omitted)

$42,245

$192,614

$204,333

$81,370

$99,012

$104,164

See Notes to Financial Statements

13


MFS New Discovery Value Fund

Financial Highlights - continued

Class R4 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$18.17

$18.14

$17.50

$18.24

$20.25

$18.72

Income (loss) from investment operations

Net investment income (loss) (d)

$0.09

$0.17

$0.24

$0.21

$0.17

$0.09

Net realized and unrealized gain (loss)

0.98

1.68

1.60

0.15

(0.78

)

3.36

Total from investment operations

$1.07

$1.85

$1.84

$0.36

$(0.61

)

$3.45

Less distributions declared to shareholders

From net investment income

$—

$(0.24

)

$(0.34

)

$(0.22

)

$(0.28

)

$(0.20

)

From net realized gain

(0.64

)

(1.58

)

(0.86

)

(0.88

)

(1.12

)

(1.72

)

Total distributions declared to shareholders

$(0.64

)

$(1.82

)

$(1.20

)

$(1.10

)

$(1.40

)

$(1.92

)

Net asset value, end of period (x)

$18.60

$18.17

$18.14

$17.50

$18.24

$20.25

Total return (%) (r)(s)(t)(x)

5.89

(n)

11.11

10.12

2.24

(2.66

)

18.60

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions

0.99

(a)

0.98

0.96

0.95

0.95

0.94

Expenses after expense reductions

0.98

(a)

0.96

0.94

0.94

0.93

0.93

Net investment income (loss)

0.94

(a)

0.99

1.30

1.24

0.91

0.45

Portfolio turnover rate

31

(n)

47

34

34

30

44

Net assets at end of period (000 omitted)

$53,622

$64,256

$63,305

$66,910

$73,846

$103,464

Class R6 

Six months

ended

Year ended

8/31/26

(unaudited)

2/28/26

2/28/25

2/29/24

2/28/23

2/28/22

Net asset value, beginning of period

$18.21

$18.17

$17.53

$18.27

$20.29

$18.75

Income (loss) from investment operations

Net investment income (loss) (d)

$0.10

$0.19

$0.26

$0.23

$0.18

$0.13

Net realized and unrealized gain (loss)

0.98

1.68

1.59

0.15

(0.78

)

3.35

Total from investment operations

$1.08

$1.87

$1.85

$0.38

$(0.60

)

$3.48

Less distributions declared to shareholders

From net investment income

$—

$(0.25

)

$(0.35

)

$(0.24

)

$(0.30

)

$(0.22

)

From net realized gain

(0.64

)

(1.58

)

(0.86

)

(0.88

)

(1.12

)

(1.72

)

Total distributions declared to shareholders

$(0.64

)

$(1.83

)

$(1.21

)

$(1.12

)

$(1.42

)

$(1.94

)

Net asset value, end of period (x)

$18.65

$18.21

$18.17

$17.53

$18.27

$20.29

Total return (%) (r)(s)(t)(x)

5.93

(n)

11.27

10.20

2.34

(2.59

)

18.75

Ratios (%) (to average net assets)

and Supplemental data:

Expenses before expense reductions

0.89

(a)

0.88

0.86

0.86

0.85

0.84

Expenses after expense reductions

0.87

(a)

0.86

0.85

0.84

0.84

0.83

Net investment income (loss)

1.05

(a)

1.10

1.40

1.32

1.00

0.62

Portfolio turnover rate

31

(n)

47

34

34

30

44

Net assets at end of period (000 omitted)

$1,280,127

$1,387,273

$1,431,761

$1,585,878

$1,728,213

$1,875,681

See Notes to Financial Statements

14


MFS New Discovery Value Fund

Financial Highlights - continued

(a)

Annualized.

(d)

Per share data is based on average shares outstanding.

(n)

Not annualized.

(r)

Certain expenses have been reduced without which performance would have been lower.

(s)

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

(t)

Total returns do not include any applicable sales charges.

(w)

Per share amount was less than $0.01.

(x)

The net asset values and total returns 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

15


MFS New Discovery Value Fund

Notes to Financial Statements (unaudited)

(1) Business and Organization

MFS New Discovery Value Fund (the fund) is a diversified series of MFS Series Trust XIII (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

16


MFS New Discovery Value Fund

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. Events that occur after foreign markets close (such as developments in foreign markets and significant movements in the U.S. markets) and prior to the determination of the fund’s net asset value may be deemed to have a material effect on the value of securities traded in foreign markets. Accordingly, the fund’s foreign equity securities may often be valued at fair value. 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

$2,278,764,744

$—

$—

$2,278,764,744

Mutual Funds

55,825,967

—

—

55,825,967

Total

$2,334,590,711

$—

$—

$2,334,590,711

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 $41,329,483.  The fair value of the fund's investment securities on loan and a related liability of $42,249,413 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

17


MFS New Discovery Value Fund

Notes to Financial Statements (unaudited) - continued 

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 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 treating a portion of the proceeds from redemptions as a distribution for tax purposes.

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)

$90,674,426

Long-term capital gains

180,649,513

Total distributions

$271,323,939

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

18


MFS New Discovery Value Fund

Notes to Financial Statements (unaudited) - continued 

As of 8/31/26

Cost of investments

$1,970,453,635

Gross appreciation

466,002,250

Gross depreciation

(101,865,174

)

Net unrealized appreciation (depreciation)

$364,137,076

As of 2/28/26

Undistributed ordinary income

5,436,888

Undistributed long-term capital gain

72,485,942

Net unrealized appreciation (depreciation)

548,521,924

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

Multiple Classes of Shares of Beneficial Interest — The fund offers multiple classes of shares, which differ in their respective distribution and service fees. The fund's income, realized and unrealized gain (loss), and common expenses are allocated to shareholders based on the daily net assets of each class. Dividends are declared separately for each class. Differences in per share dividend rates are generally due to differences in separate class expenses. Class B and Class C shares will convert to Class A shares approximately eight years after purchase. The fund’s distributions declared to shareholders as reported in the Statements of Changes in Net Assets are presented by class as follows: 

Six months

ended

8/31/26

Year

ended

2/28/26

Class A

$8,264,425

$23,885,761

Class B

8,703

77,170

Class C

270,692

1,021,360

Class I

22,374,305

83,631,459

Class R1

78,691

196,777

Class R2

131,115

376,593

Class R3

1,532,546

19,042,685

Class R4

1,802,809

6,161,094

Class R6

43,468,427

136,931,040

Total

$77,931,713

$271,323,939

(3) Transactions with Affiliates

Investment Adviser — The fund has an investment advisory 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 the following annual rates based on the fund's average daily net assets: 

Up to $1 billion

0.90%

In excess of $1 billion and up to $2.5 billion

0.80%

In excess of $2.5 billion and up to $5 billion

0.75%

In excess of $5 billion

0.70%

MFS has agreed in writing to reduce its management fee by a specified amount if certain MFS mutual fund assets exceed thresholds agreed to by MFS and the fund's Board of Trustees. MFS has also agreed in writing to waive at least 0.01% of its management fee as part of this agreement. The agreement to waive at least 0.01% of the management fee will continue until modified by the fund's Board of Trustees, but such agreement will continue at least until June 30, 2027. For the six months ended August 31, 2026, this management fee reduction amounted to $172,805, which is included in the reduction of total expenses in the Statement of Operations. The management fee incurred for the six months ended August 31, 2026 was equivalent to an annual effective rate of 0.83% of the fund's average daily net assets.

The investment adviser has agreed in writing to pay a portion of the fund’s total annual operating expenses, excluding interest, taxes, extraordinary expenses, brokerage and transaction costs, certain tax reclaim recovery expenses (including contingency fees and closing agreement expenses), and investment-related expenses, such that total fund operating expenses do not exceed the following rates annually of each class’s average daily net assets: 

19


MFS New Discovery Value Fund

Notes to Financial Statements (unaudited) - continued 

Classes

A

B

C

I

R1

R2

R3

R4

R6

1.39%

2.14%

2.14%

1.14%

2.14%

1.64%

1.39%

1.14%

1.07%

This written agreement will continue until modified by the fund’s Board of Trustees, but such agreement will continue at least until June 30, 2028. For the six months ended August 31, 2026, the fund’s actual operating expenses did not exceed the limit and therefore, the investment adviser did not pay any portion of the fund’s expenses related to this agreement.

Distributor — MFS Fund Distributors, Inc. (MFD), a wholly-owned subsidiary of MFS, as distributor, received $2,131 for the six months ended August 31, 2026, as its portion of the initial sales charge on sales of Class A shares of the fund.

The Board of Trustees has adopted a distribution plan for certain share classes pursuant to Rule 12b-1 of the Investment Company Act of 1940.

The fund's distribution plan provides that the fund will pay MFD for services provided by MFD and financial intermediaries in connection with the distribution and servicing of certain share classes. One component of the plan is a distribution fee paid to MFD and another component of the plan is a service fee paid to MFD. MFD may subsequently pay all, or a portion, of the distribution and/or service fees to financial intermediaries. The distribution and service fees are computed daily and paid monthly.

Distribution Plan Fee Table: 

Distribution

Fee Rate (d)

Service

Fee Rate (d)

Total

Distribution

Plan (d)

Annual

Effective

Rate (e)

Distribution

and Service

Fee

Class A

—

0.25%

0.25%

0.25%

$303,095

Class B

0.75%

0.25%

1.00%

1.00%

2,033

Class C

0.75%

0.25%

1.00%

1.00%

39,475

Class R1

0.75%

0.25%

1.00%

1.00%

10,415

Class R2

0.25%

0.25%

0.50%

0.50%

9,534

Class R3

—

0.25%

0.25%

0.25%

201,575

Total Distribution and Service Fees

$566,127

(d)

 In accordance with the distribution plan for certain classes, the fund pays distribution and/or service fees equal to these annual percentage rates of each

class’s average daily net assets. The distribution and service fee rates disclosed by class represent the current rates in effect at the end of the reporting

period. Any rate changes, if applicable, are detailed below.

(e)

 The annual effective rates represent actual fees incurred under the distribution plan for the six months ended August 31, 2026 based on each class's average daily net assets.  MFD has voluntarily agreed to rebate a portion of each class's 0.25% service fee attributable to accounts for which there is no financial intermediary specified on the account except for accounts attributable to MFS or its affiliates' seed money. For the six months ended August 31, 2026, there were no service fee rebates.

Certain Class A shares are subject to a contingent deferred sales charge (CDSC) in the event of a shareholder redemption within 18 months of purchase. Class B shares are subject to a CDSC in the event of a shareholder redemption within six years of purchase. Class C shares are subject to a CDSC in the event of a shareholder redemption within 12 months of purchase. All contingent deferred sales charges are paid to MFD and during the six months ended August 31, 2026, were as follows: 

Amount

Class A

$320

Class B

—

Class C

64

Shareholder Servicing Agent — MFS Service Center, Inc. (MFSC), a wholly-owned subsidiary of MFS, receives a fee from the fund for its services as shareholder servicing agent calculated as a percentage of the average daily net assets of the fund as determined periodically under the supervision of the fund's Board of Trustees. For the six months ended August 31, 2026, the fee was $37,954, which equated to 0.0030% annually of the fund's average daily net assets. MFSC also receives reimbursement from the fund for out-of-pocket expenses, sub-accounting and other shareholder servicing costs which may be paid to affiliated and unaffiliated service providers. Class R6 shares do not incur sub-accounting fees. For the six months ended August 31, 2026, these out-of-pocket expenses, sub-accounting and other shareholder servicing costs amounted to $626,221.

20


MFS New Discovery Value Fund

Notes to Financial Statements (unaudited) - continued 

Administrator — MFS provides certain financial, legal, shareholder communications, compliance, and other administrative services to the fund. Under an administrative services agreement, the fund reimburses MFS the costs incurred to provide these services. The fund is charged an annual fixed amount of $17,500 plus a fee based on average daily net assets. The administrative services fee is computed daily and paid monthly. The administrative services fee incurred for the six months ended August 31, 2026 was equivalent to an annual effective rate of 0.0139% of the fund's average daily net assets.

Trustees’ and Officers’ Compensation — The fund pays compensation to independent Trustees in the form of a retainer, attendance fees, and additional compensation to Board and Committee chairpersons. Independent Trustees’ compensation is accrued daily and paid subsequent to each Trustee Board meeting. The fund does not pay compensation directly to Trustees or officers of the fund who are also officers of the investment adviser, all of whom receive remuneration from MFS for their services to the fund. Certain officers and Trustees of the fund are officers or directors of MFS, MFD, and MFSC.

Other — The fund invests in the MFS Institutional Money Market Portfolio which is managed by MFS and seeks current income consistent with preservation of capital and liquidity. This money market fund does not pay a management fee to MFS but does incur investment and operating costs.

During the six months ended August 31, 2026, pursuant to a policy adopted by the Board of Trustees and designed to comply with Rule 17a-7 under the Investment Company Act of 1940 (the “Act”) and relevant guidance, the fund engaged in sale transactions with funds and accounts for which MFS serves as investment adviser or sub-adviser (“cross-trades”) which amounted to $3,013,498. The sales transactions resulted in net realized gains (losses) of $1,579,599.

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 $153,467, 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, aggregated $750,384,070 and $1,300,080,769, respectively.

(5) Shares of Beneficial Interest

The fund's Declaration of Trust permits the Trustees to issue an unlimited number of full and fractional shares of beneficial interest. Transactions in fund shares were as follows: 

Six months ended

8/31/26

Year ended

2/28/26

Shares

Amount

Shares

Amount

Shares sold

Class A

231,459

$4,209,847

518,587

$8,844,756

Class B

—

—

254

4,001

Class C

4,862

78,476

11,953

189,419

Class I

1,017,567

18,302,776

5,167,728

89,957,100

Class R1

2,467

40,761

6,535

103,472

Class R2

5,876

103,525

18,964

318,899

Class R3

288,375

5,225,676

1,396,891

24,075,895

Class R4

200,676

3,657,570

393,967

6,877,338

Class R6

3,046,423

56,001,964

10,618,203

179,864,840

4,797,705

$87,620,595

18,133,082

$310,235,720

21


MFS New Discovery Value Fund

Notes to Financial Statements (unaudited) - continued 

Six months ended

8/31/26

Year ended

2/28/26

Shares

Amount

Shares

Amount

Shares issued to shareholders

in reinvestment of distributions

Class A

451,472

$8,257,423

1,426,401

$23,851,179

Class B

520

8,703

4,899

75,618

Class C

16,366

270,692

66,907

1,021,277

Class I

1,192,961

22,129,428

4,868,412

82,402,405

Class R1

4,740

78,691

12,853

196,777

Class R2

7,276

131,115

22,821

376,593

Class R3

83,517

1,532,546

1,136,149

19,042,685

Class R4

96,925

1,802,809

363,231

6,161,094

Class R6

2,072,858

38,638,078

7,214,732

122,596,325

3,926,635

$72,849,485

15,116,405

$255,723,953

Shares reacquired

Class A

(1,189,519

)

$(21,538,300

)

(3,238,497

)

$(55,666,499

)

Class B

(27,037

)

(449,153

)

(62,310

)

(982,610

)

Class C

(176,348

)

(2,903,400

)

(418,113

)

(6,536,459

)

Class I

(12,765,526

)

(231,543,881

)

(32,018,033

)

(555,185,546

)

Class R1

(8,381

)

(134,281

)

(3,807

)

(60,240

)

Class R2

(24,514

)

(441,129

)

(37,615

)

(649,424

)

Class R3

(8,800,967

)

(166,207,589

)

(3,193,997

)

(55,761,136

)

Class R4

(950,413

)

(17,588,525

)

(711,351

)

(12,505,354

)

Class R6

(12,657,009

)

(234,912,759

)

(20,434,185

)

(360,758,968

)

(36,599,714

)

$(675,719,017

)

(60,117,908

)

$(1,048,106,236

)

Net change

Class A

(506,588

)

$(9,071,030

)

(1,293,509

)

$(22,970,564

)

Class B

(26,517

)

(440,450

)

(57,157

)

(902,991

)

Class C

(155,120

)

(2,554,232

)

(339,253

)

(5,325,763

)

Class I

(10,554,998

)

(191,111,677

)

(21,981,893

)

(382,826,041

)

Class R1

(1,174

)

(14,829

)

15,581

240,009

Class R2

(11,362

)

(206,489

)

4,170

46,068

Class R3

(8,429,075

)

(159,449,367

)

(660,957

)

(12,642,556

)

Class R4

(652,812

)

(12,128,146

)

45,847

533,078

Class R6

(7,537,728

)

(140,272,717

)

(2,601,250

)

(58,297,803

)

(27,875,374

)

$(515,248,937

)

(26,868,421

)

$(482,146,563

)

The fund is one of several mutual funds in which certain MFS funds may invest. The MFS funds do not invest in the underlying funds for the purpose of exercising management or control. At the end of the period, the MFS Growth Allocation Fund, the MFS Moderate Allocation Fund, the MFS Aggressive Growth Allocation Fund, and the MFS Conservative Allocation Fund were the owners of record of approximately 6%, 4%, 3%, and 2%, respectively, of the value of outstanding voting shares of the fund. In addition, the MFS Lifetime 2030 Fund, the MFS Lifetime 2035 Fund, the MFS Lifetime 2040 Fund, the MFS Lifetime 2045 Fund, the MFS Lifetime 2050 Fund, the MFS Lifetime 2055 Fund, the MFS Lifetime 2060 Fund, the MFS Lifetime 2065 Fund, the MFS Lifetime 2070 Fund, and the MFS Lifetime Income Fund were each the owners of record of less than 1% of the value of outstanding voting shares of the fund.

Effective June 1, 2019, purchases of the fund’s Class B shares were closed to new and existing investors subject to certain exceptions. Effective at the close of business on August 14, 2019, the fund was closed to new investors subject to certain exceptions. Effective September 29, 2023, purchases of the fund's Class R1 and Class R2 shares were closed to new eligible investors.

22


MFS New Discovery Value Fund

Notes to Financial Statements (unaudited) - continued 

(6) Line of Credit

The fund and certain other funds managed by MFS participate in a $1.45 billion unsecured committed line of credit of which $1.2 billion is reserved for use by the fund and certain other MFS U.S. funds. The line of credit is provided by a syndicate of banks under a credit agreement. Borrowings may be made for temporary financing needs. Interest is charged to each fund, based on its borrowings, generally at a rate equal to the highest of 1) Daily Simple SOFR (Secured Overnight Financing Rate), 2) the Federal Funds Effective Rate, or 3) the Overnight Bank Funding Rate, each plus an agreed upon spread. A commitment fee, based on the average daily unused portion of the committed line of credit, is allocated among the participating funds. The line of credit expires on March 11, 2027 unless extended or renewed. In addition, the fund and other funds managed by MFS have established unsecured uncommitted borrowing arrangements with certain banks for temporary financing needs. Interest is charged to each fund, based on its borrowings, at rates equal to customary reference rates plus an agreed upon spread. For the six months ended August 31, 2026, the fund’s commitment fee and interest expense were $6,225 and $12,861, respectively, and are included in “Miscellaneous” expense in the Statement of Operations.

(7) Investments in Affiliated Issuers

An affiliated issuer may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. The following were affiliated issuers for the six months ended August 31, 2026: 

Affiliated Issuers

Beginning

Value

Purchases

Sales

Proceeds

Realized

Gain

(Loss)

Change in

Unrealized

Appreciation

or

Depreciation

Ending

Value

MFS Institutional Money Market

Portfolio

$2,381,565

$381,567,913

$370,378,210

$5,286

$—

$13,576,554

Affiliated Issuers

Dividend

Income

Capital Gain

Distributions

MFS Institutional Money Market Portfolio

$424,571

$—

23


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

There is nothing to report for this item for MFS New Discovery Value Fund.

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

There is nothing to report for this item for MFS New Discovery Value Fund.

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 New Discovery Value Fund. 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.

24


MFS New Discovery Value Fund

Board Review of Investment Advisory Agreement

MFS New Discovery Value Fund

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 advisory 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 advisory 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 advisory 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 advisory 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 advisory 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 advisory agreement and other arrangements with the Fund. 

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 various time periods 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 advisory fees and other expenses 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 and other clients, (iv) information as to whether and to what extent applicable expense waivers, reimbursements or fee “breakpoints” are observed for the Fund, (v) 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, (vi) MFS’ views regarding the outlook for the mutual fund industry and the strategic business plans of MFS, (vii) descriptions of various functions performed by MFS for the Funds, such as compliance monitoring and portfolio trading practices, and (viii) 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 advisory 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 various time periods. The Trustees placed particular emphasis on the total return performance of the Fund’s Class I shares in comparison to the performance of funds in its Broadridge performance universe over the five-year period ended December 31, 2025, which the Trustees believed was a long enough period to reflect differing market conditions.  The total return performance of the Fund’s Class I shares was in the 4th quintile relative to the other funds in the universe for this five-year period (the 1st quintile being the best performers and the 5th quintile being the worst performers).  The total return performance of the Fund’s Class I shares was in the 4th quintile for the one-year period and the 5th quintile for the three-year period ended December 31, 2025 relative to the Broadridge performance universe.  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.

The Trustees expressed concern to MFS about the substandard investment performance of the Fund.  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, as to MFS’ efforts to improve the Fund’s performance.  In addition, the Trustees requested that they receive a separate update on the Fund’s performance at each of their regular meetings.  After reviewing these and related factors, the Trustees concluded, within the context

25


MFS New Discovery Value Fund

Board Review of Investment Advisory Agreement - continued

of their overall conclusions regarding the investment advisory agreement, that MFS’ responses and efforts and plans to improve investment performance were sufficient to support approval of the continuance of the investment advisory agreement for an additional one-year period, but that they would continue to closely monitor the performance of the Fund.

In assessing the reasonableness of the Fund’s advisory fee, the Trustees considered, among other information, the Fund’s advisory fee and the total expense ratio of the Fund’s Class I shares as a percentage of average daily net assets and the advisory fee and total expense ratios of the Broadridge expense group based on information provided by Broadridge.  The Trustees considered that MFS currently observes an expense limitation for the Fund, which may not be changed without the Trustees’ approval.  The Trustees also considered that, according to the data provided by Broadridge (which takes into account any fee reductions or expense limitations that were in effect during the Fund’s last fiscal year), the Fund’s effective advisory fee rate and total expense ratio were each approximately at the 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 also considered whether the Fund may benefit from any economies of scale in the management of the Fund in the event of growth in assets of the Fund and/or growth in assets of the MFS Funds as a whole.  They noted that the Fund’s advisory fee rate schedule is subject to contractual breakpoints that reduce the Fund’s advisory fee rate on average daily net assets over $1 billion, $2.5 billion, and $5 billion.  The Trustees also noted that MFS has agreed in writing to waive a portion of the management fees of certain MFS Funds, including the Fund, if the total combined assets of certain funds within the MFS Funds’ complex increase above agreed upon thresholds (the “group fee waiver”), enabling the Fund’s shareholders to share in the benefits from any economies of scale at the complex level.  The group fee waiver is reviewed and renewed annually between the Board and MFS.  The Trustees concluded that the breakpoints and the group fee waiver were sufficient to allow the Fund to benefit from economies of scale as its assets and overall complex assets grow.

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 advisory agreement, that the advisory fees charged to the Fund represent 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 advisory agreement, including any 12b-1 fees the Fund pays to MFS Fund Distributors, Inc., an affiliate of MFS.  The Trustees also considered the nature, extent and quality of certain other services MFS performs or arranges 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 advisory agreement with MFS should be continued for an additional one-year period, commencing August 1, 2026.

26


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 SERIES TRUST XIII                                                          

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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