# EDGAR Filing Document

**Accession Number:** 0000798244
**File Stem:** 0001410368-26-007037
**Filing Date:** 2026-1
**Character Count:** 69253
**Document Hash:** 28c222d5691b737a6fdbb5dd69037fc7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-007037.hdr.sgml**: 20260126

**ACCESSION NUMBER**: 0001410368-26-007037

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 4

**CONFORMED PERIOD OF REPORT**: 20251130

**FILED AS OF DATE**: 20260126

**DATE AS OF CHANGE**: 20260126

**PERIOD START**: 20260831

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MFS SERIES TRUST I
- **CENTRAL INDEX KEY:** 0000798244

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1130

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-04777
- **FILM NUMBER:** 26558561

**BUSINESS ADDRESS:**
- **STREET 1:** 111 HUNTINGTON AVENUE
- **STREET 2:** 21ST FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199
- **BUSINESS PHONE:** 18006372929

**MAIL ADDRESS:**
- **STREET 1:** 111 HUNTINGTON AVENUE
- **STREET 2:** 21ST FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MFS SERIES TRUST I /MA/
- **DATE OF NAME CHANGE:** 19940427

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MFS LIFETIME MANAGED SECTORS FUND
- **DATE OF NAME CHANGE:** 19930408

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** LIFETIME MANAGED SECTORS TRUST
- **DATE OF NAME CHANGE:** 19920703

## Series and Classes Contracts Data

### MFS Research International Fund (Series ID: S000000766)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000002223 | A            | MRSAX           |
| C000002224 | R4           | MRSJX           |
| C000002228 | B            | MRIBX           |
| C000002229 | C            | MRICX           |
| C000002230 | I            | MRSIX           |
| C000002232 | R1           | MRSGX           |
| C000002234 | R2           | MRSRX           |
| C000002235 | R3           | MRSHX           |
| C000034436 | R6           | MRSKX           |

## Nport-Ex

RIF-Q1

![](img9294ec831.gif)

**Quarterly Report**

November 30, 2025

MFS<sup>®</sup> Research <br>International Fund

![](img7f3f74eb2.gif)

------

**Portfolio of Investments**

11/30/25 (unaudited)

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

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – 99.0%  | Common Stocks – 99.0%  | Common Stocks – 99.0%  |
| Aerospace & Defense – 2.6% | Aerospace & Defense – 2.6% |  |
| Babcock International Group PLC | 5333618 | &nbsp;&nbsp;&nbsp; $80039380 |
| MTU Aero Engines Holding AG | 536808 | &nbsp;&nbsp;&nbsp; 219376243 |
| Thales S.A. | 649713 | &nbsp;&nbsp;&nbsp; 169876553 |
|  |  | &nbsp;&nbsp;&nbsp; $469292176 |
| Airlines – 0.7% | Airlines – 0.7% |  |
| Qantas Airways Ltd. | 10242186 | &nbsp;&nbsp;&nbsp; $66952126 |
| Ryanair Holdings PLC, ADR | 945926 | &nbsp;&nbsp;&nbsp; 64474316 |
|  |  | &nbsp;&nbsp;&nbsp; $131426442 |
| Alcoholic Beverages – 2.1% | Alcoholic Beverages – 2.1% |  |
| Davide Campari-Milano N.V. | 16409367 | &nbsp;&nbsp;&nbsp; $111658518 |
| Kirin Holdings Co. Ltd. | 6321600 | &nbsp;&nbsp;&nbsp; 99334223 |
| Pernod Ricard S.A. | 1804295 | &nbsp;&nbsp;&nbsp; 162373552 |
|  |  | &nbsp;&nbsp;&nbsp; $373366293 |
| Apparel Manufacturers – 2.7% | Apparel Manufacturers – 2.7% |  |
| Burberry Group PLC (a) | 2535071 | &nbsp;&nbsp;&nbsp; $38261003 |
| Compagnie Financiere Richemont S.A. | 907836 | &nbsp;&nbsp;&nbsp; 192461684 |
| LVMH Moet Hennessy Louis Vuitton SE | 339765 | &nbsp;&nbsp;&nbsp; 250467953 |
|  |  | &nbsp;&nbsp;&nbsp; $481190640 |
| Automotive – 2.0% | Automotive – 2.0% |  |
| Compagnie Generale des Etablissements Michelin | 2611781 | &nbsp;&nbsp;&nbsp; $85285093 |
| Suzuki Motor Corp. | 11007500 | &nbsp;&nbsp;&nbsp; 172084716 |
| Toyota Industries Corp. | 809800 | &nbsp;&nbsp;&nbsp; 90657769 |
|  |  | &nbsp;&nbsp;&nbsp; $348027578 |
| Biotechnology – 0.8% | Biotechnology – 0.8% |  |
| CSL Ltd.  | 1165788 | &nbsp;&nbsp;&nbsp; $142256988 |
| Broadcasting – 0.8% | Broadcasting – 0.8% |  |
| Spotify Technology S.A. (a)  | 226539 | &nbsp;&nbsp;&nbsp; $135667411 |
| Brokerage & Asset Managers – 5.3% | Brokerage & Asset Managers – 5.3% |  |
| B3 S.A. - Brasil Bolsa Balcao | 45637600 | &nbsp;&nbsp;&nbsp; $127991469 |
| Barclays PLC | 61094947 | &nbsp;&nbsp;&nbsp; 348159355 |
| Euronext N.V. | 1816893 | &nbsp;&nbsp;&nbsp; 278834924 |
| London Stock Exchange Group PLC | 1492783 | &nbsp;&nbsp;&nbsp; 176128156 |
|  |  | &nbsp;&nbsp;&nbsp; $931113904 |
| Business Services – 0.8% | Business Services – 0.8% |  |
| Fujitsu Ltd.  | 5283400 | &nbsp;&nbsp;&nbsp; $140324451 |
| Chemicals – 0.4% | Chemicals – 0.4% |  |
| FUJIFILM Holdings Corp.  | 3547400 | &nbsp;&nbsp;&nbsp; $76337031 |
| Computer Software – 2.0% | Computer Software – 2.0% |  |
| Cadence Design Systems, Inc. (a) | 500484 | &nbsp;&nbsp;&nbsp; $156070931 |
| Constellation Software, Inc. | 68876 | &nbsp;&nbsp;&nbsp; 166736464 |
| SAP SE | 111434 | &nbsp;&nbsp;&nbsp; 26957889 |
|  |  | &nbsp;&nbsp;&nbsp; $349765284 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Computer Software - Systems – 4.3% | Computer Software - Systems – 4.3% |  |
| Amadeus IT Group S.A. | 1959300 | &nbsp;&nbsp;&nbsp; $143958386 |
| Hitachi Ltd. | 14791900 | &nbsp;&nbsp;&nbsp; 470642752 |
| Samsung Electronics Co. Ltd. | 2047108 | &nbsp;&nbsp;&nbsp; 139893485 |
|  |  | &nbsp;&nbsp;&nbsp; $754494623 |
| Construction – 1.7% | Construction – 1.7% |  |
| James Hardie Industries PLC, GDR (a) | 4762749 | &nbsp;&nbsp;&nbsp; $94742243 |
| Sika AG | 446290 | &nbsp;&nbsp;&nbsp; 87919074 |
| Techtronic Industries Co. Ltd. | 10357000 | &nbsp;&nbsp;&nbsp; 121185068 |
|  |  | &nbsp;&nbsp;&nbsp; $303846385 |
| Consumer Products – 2.7% | Consumer Products – 2.7% |  |
| Beiersdorf AG | 1482812 | &nbsp;&nbsp;&nbsp; $159380931 |
| Haleon PLC | 49942031 | &nbsp;&nbsp;&nbsp; 245343712 |
| Kao Corp. | 2043600 | &nbsp;&nbsp;&nbsp; 82639236 |
|  |  | &nbsp;&nbsp;&nbsp; $487363879 |
| Electrical Equipment – 4.9% | Electrical Equipment – 4.9% |  |
| Legrand S.A. | 1526946 | &nbsp;&nbsp;&nbsp; $231237639 |
| Mitsubishi Electric Corp. | 5940900 | &nbsp;&nbsp;&nbsp; 160679011 |
| Schneider Electric SE | 1756326 | &nbsp;&nbsp;&nbsp; 470625096 |
|  |  | &nbsp;&nbsp;&nbsp; $862541746 |
| Electronics – 4.5% | Electronics – 4.5% |  |
| ASML Holding N.V. | 268878 | &nbsp;&nbsp;&nbsp; $281769076 |
| DISCO Corp. | 127300 | &nbsp;&nbsp;&nbsp; 35652805 |
| Taiwan Semiconductor Manufacturing Co. Ltd. | 6304326 | &nbsp;&nbsp;&nbsp; 289253766 |
| Tokyo Electron Ltd. | 919600 | &nbsp;&nbsp;&nbsp; 187288843 |
|  |  | &nbsp;&nbsp;&nbsp; $793964490 |
| Energy - Independent – 0.5% | Energy - Independent – 0.5% |  |
| Reliance Industries Ltd.  | 5610542 | &nbsp;&nbsp;&nbsp; $98320519 |
| Energy - Integrated – 3.6% | Energy - Integrated – 3.6% |  |
| Eni S.p.A. (l) | 9538870 | &nbsp;&nbsp;&nbsp; $178502012 |
| Galp Energia SGPS S.A., "B" | 8791820 | &nbsp;&nbsp;&nbsp; 177097140 |
| TotalEnergies SE | 4164424 | &nbsp;&nbsp;&nbsp; 274385557 |
|  |  | &nbsp;&nbsp;&nbsp; $629984709 |
| Engineering - Construction – 0.7% | Engineering - Construction – 0.7% |  |
| Taisei Corp.  | 1513200 | &nbsp;&nbsp;&nbsp; $129378891 |
| Food & Beverages – 0.5% | Food & Beverages – 0.5% |  |
| Novozymes A.S.  | 1407055 | &nbsp;&nbsp;&nbsp; $87768831 |
| Food & Drug Stores – 0.8% | Food & Drug Stores – 0.8% |  |
| Alimentation Couche-Tard, Inc. | 860932 | &nbsp;&nbsp;&nbsp; $47034992 |
| Jeronimo Martins SGPS S.A. | 4374134 | &nbsp;&nbsp;&nbsp; 103712463 |
|  |  | &nbsp;&nbsp;&nbsp; $150747455 |
| Gaming & Lodging – 1.2% | Gaming & Lodging – 1.2% |  |
| Accor S.A. | 1649463 | &nbsp;&nbsp;&nbsp; $89201636 |
| Aristocrat Leisure Ltd. | 2008983 | &nbsp;&nbsp;&nbsp; 76768642 |
| Sands China Ltd. | 16470800 | &nbsp;&nbsp;&nbsp; 44848437 |
|  |  | &nbsp;&nbsp;&nbsp; $210818715 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Insurance – 5.8% | Insurance – 5.8% |  |
| AIA Group Ltd. | 18281400 | &nbsp;&nbsp;&nbsp; $189252336 |
| Aon PLC | 520495 | &nbsp;&nbsp;&nbsp; 184213590 |
| Beazley PLC | 18685588 | &nbsp;&nbsp;&nbsp; 197373735 |
| Hiscox Ltd. | 8178208 | &nbsp;&nbsp;&nbsp; 145149267 |
| Samsung Fire & Marine Insurance Co. Ltd. | 209622 | &nbsp;&nbsp;&nbsp; 68631553 |
| Sompo Holdings, Inc. | 3497200 | &nbsp;&nbsp;&nbsp; 110936542 |
| Willis Towers Watson PLC | 393642 | &nbsp;&nbsp;&nbsp; 126359082 |
|  |  | &nbsp;&nbsp;&nbsp; $1021916105 |
| Leisure & Toys – 1.6% | Leisure & Toys – 1.6% |  |
| Capcom Co. Ltd. | 1752500 | &nbsp;&nbsp;&nbsp; $42908976 |
| Sony Group Corp. | 7984900 | &nbsp;&nbsp;&nbsp; 233962582 |
|  |  | &nbsp;&nbsp;&nbsp; $276871558 |
| Machinery & Tools – 5.1% | Machinery & Tools – 5.1% |  |
| Atlas Copco AB, "A" | 9760273 | &nbsp;&nbsp;&nbsp; $165618474 |
| Daikin Industries Ltd. | 1076600 | &nbsp;&nbsp;&nbsp; 139866985 |
| GEA Group AG | 1832739 | &nbsp;&nbsp;&nbsp; 124157066 |
| Keyence Corp. | 375900 | &nbsp;&nbsp;&nbsp; 127932151 |
| RB Global, Inc. | 1202326 | &nbsp;&nbsp;&nbsp; 117810134 |
| Spirax Group PLC | 1171441 | &nbsp;&nbsp;&nbsp; 104032995 |
| Weir Group PLC | 3280838 | &nbsp;&nbsp;&nbsp; 120456408 |
|  |  | &nbsp;&nbsp;&nbsp; $899874213 |
| Major Banks – 13.2% | Major Banks – 13.2% |  |
| ABN AMRO Group N.V., GDR | 8420487 | &nbsp;&nbsp;&nbsp; $284730336 |
| Banco Bradesco S.A., ADR | 39946895 | &nbsp;&nbsp;&nbsp; 147803511 |
| Bank of Ireland Group PLC | 17591738 | &nbsp;&nbsp;&nbsp; 325686387 |
| BNP Paribas S.A. | 2140025 | &nbsp;&nbsp;&nbsp; 182930186 |
| Erste Group Bank AG | 1099087 | &nbsp;&nbsp;&nbsp; 120035683 |
| Mizuho Financial Group, Inc. | 13540300 | &nbsp;&nbsp;&nbsp; 474612924 |
| NatWest Group PLC | 42800728 | &nbsp;&nbsp;&nbsp; 358391372 |
| Toronto-Dominion Bank | 2662859 | &nbsp;&nbsp;&nbsp; 224231730 |
| UBS Group AG | 5640060 | &nbsp;&nbsp;&nbsp; 217794922 |
|  |  | &nbsp;&nbsp;&nbsp; $2336217051 |
| Medical Equipment – 2.5% | Medical Equipment – 2.5% |  |
| Alcon, Inc. | 1351506 | &nbsp;&nbsp;&nbsp; $107440773 |
| ConvaTec Group PLC | 36419613 | &nbsp;&nbsp;&nbsp; 113648187 |
| QIAGEN N.V. | 3060600 | &nbsp;&nbsp;&nbsp; 146005917 |
| Terumo Corp. | 4881800 | &nbsp;&nbsp;&nbsp; 76287896 |
|  |  | &nbsp;&nbsp;&nbsp; $443382773 |
| Metals & Mining – 2.6% | Metals & Mining – 2.6% |  |
| Glencore PLC | 31109464 | &nbsp;&nbsp;&nbsp; $148665760 |
| Mitsui & Co. Ltd. | 6488200 | &nbsp;&nbsp;&nbsp; 172323334 |
| Rio Tinto PLC | 1937124 | &nbsp;&nbsp;&nbsp; 139113358 |
|  |  | &nbsp;&nbsp;&nbsp; $460102452 |
| Natural Gas - Distribution – 0.2% | Natural Gas - Distribution – 0.2% |  |
| China Resources Gas Group Ltd.  | 15742900 | &nbsp;&nbsp;&nbsp; $46142076 |
| Natural Gas - Pipeline – 0.3% | Natural Gas - Pipeline – 0.3% |  |
| APA Group  | 8684873 | &nbsp;&nbsp;&nbsp; $52676345 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Other Banks & Diversified Financials – 2.2% | Other Banks & Diversified Financials – 2.2% |  |
| HDFC Bank Ltd. | 16177602 | &nbsp;&nbsp;&nbsp; $182235968 |
| Mastercard, Inc., "A" | 367815 | &nbsp;&nbsp;&nbsp; 202493192 |
|  |  | &nbsp;&nbsp;&nbsp; $384729160 |
| Pharmaceuticals – 6.8% | Pharmaceuticals – 6.8% |  |
| Daiichi Sankyo Co. Ltd. | 8453300 | &nbsp;&nbsp;&nbsp; $209194000 |
| Merck KGaA | 1091236 | &nbsp;&nbsp;&nbsp; 146836711 |
| Novo Nordisk A.S., "B" | 2759988 | &nbsp;&nbsp;&nbsp; 135894535 |
| Roche Holding AG | 1332096 | &nbsp;&nbsp;&nbsp; 509755148 |
| Sanofi S.A. | 1974769 | &nbsp;&nbsp;&nbsp; 196453172 |
|  |  | &nbsp;&nbsp;&nbsp; $1198133566 |
| Printing & Publishing – 0.6% | Printing & Publishing – 0.6% |  |
| Wolters Kluwer N.V.  | 1006263 | &nbsp;&nbsp;&nbsp; $106921477 |
| Real Estate – 0.3% | Real Estate – 0.3% |  |
| LEG Immobilien SE  | 655247 | &nbsp;&nbsp;&nbsp; $49253604 |
| Specialty Chemicals – 3.9% | Specialty Chemicals – 3.9% |  |
| Akzo Nobel N.V. | 1262021 | &nbsp;&nbsp;&nbsp; $82039439 |
| Croda International PLC | 2365840 | &nbsp;&nbsp;&nbsp; 85295357 |
| Linde PLC | 693989 | &nbsp;&nbsp;&nbsp; 284757566 |
| Shin-Etsu Chemical Co. Ltd. | 4643100 | &nbsp;&nbsp;&nbsp; 139822315 |
| Symrise AG | 1124128 | &nbsp;&nbsp;&nbsp; 93156933 |
|  |  | &nbsp;&nbsp;&nbsp; $685071610 |
| Specialty Stores – 1.7% | Specialty Stores – 1.7% |  |
| NEXT PLC | 614314 | &nbsp;&nbsp;&nbsp; $114888618 |
| Nitori Co. Ltd. | 2612000 | &nbsp;&nbsp;&nbsp; 45200615 |
| Pan Pacific International Holdings Corp. | 22512400 | &nbsp;&nbsp;&nbsp; 136553696 |
|  |  | &nbsp;&nbsp;&nbsp; $296642929 |
| Telecom - Infrastructure – 0.6% | Telecom - Infrastructure – 0.6% |  |
| Cellnex Telecom S.A.  | 3532687 | &nbsp;&nbsp;&nbsp; $105972127 |
| Telecom Services – 2.3% | Telecom Services – 2.3% |  |
| Advanced Info Service Public Co. Ltd. | 9852300 | &nbsp;&nbsp;&nbsp; $93948008 |
| Hellenic Telecommunications Organization S.A. | 1442864 | &nbsp;&nbsp;&nbsp; 28637386 |
| KDDI Corp. | 9849600 | &nbsp;&nbsp;&nbsp; 169658635 |
| Koninklijke KPN N.V. | 24686944 | &nbsp;&nbsp;&nbsp; 112829204 |
|  |  | &nbsp;&nbsp;&nbsp; $405073233 |
| Tobacco – 1.5% | Tobacco – 1.5% |  |
| British American Tobacco PLC  | 4566618 | &nbsp;&nbsp;&nbsp; $267403506 |
| Utilities - Electric Power – 2.2% | Utilities - Electric Power – 2.2% |  |
| CLP Holdings Ltd. | 6306000 | &nbsp;&nbsp;&nbsp; $55075650 |
| E.ON SE | 6245926 | &nbsp;&nbsp;&nbsp; 111214954 |
| National Grid PLC | 14440982 | &nbsp;&nbsp;&nbsp; 219291947 |
|  |  | &nbsp;&nbsp;&nbsp; $385582551 |
| **Total Common Stocks**  |  | &nbsp;&nbsp; **$17509964777** |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

------

*Portfolio of Investments (unaudited) – continued*

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Issuer** | **Strike** <br>**Price**<br>| &nbsp;&nbsp; **First** <br>**Exercise**<br>| **Shares/Par** | **Value ($)** |
| Warrants – 0.0% |  |  |  |  |
| Computer Software – 0.0% | Computer Software – 0.0% | Computer Software – 0.0% | Computer Software – 0.0% | Computer Software – 0.0% |
| Constellation Software, Inc. (CAD 100 principal amount of Series 2 Debentures for 1 warrant, <br> Expiration 3/31/40) (a)<br>| CAD 11.5 | N/A | &nbsp;&nbsp;&nbsp;&nbsp; 105955 | &nbsp;&nbsp;&nbsp; $0 |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| Mutual Funds (h) – 0.9%  | Mutual Funds (h) – 0.9%  | Mutual Funds (h) – 0.9%  |
| Money Market Funds – 0.9% | Money Market Funds – 0.9% |  |
| MFS Institutional Money Market Portfolio, 4.01% (v)  | 148588396 | &nbsp;&nbsp;&nbsp; $148618114 |
| Collateral for Securities Loaned – 0.4%  | Collateral for Securities Loaned – 0.4%  | Collateral for Securities Loaned – 0.4%  |
| JPMorgan U.S. Government Money Market Fund - Class IM Shares, 3.93% (j)  | 77522788 | &nbsp;&nbsp;&nbsp; $77522788 |
| Other Assets, Less Liabilities – (0.3)% |  | &nbsp;&nbsp;&nbsp; (51715676)<br>|
| **Net Assets – 100.0%** | **Net Assets – 100.0%** | &nbsp;&nbsp; **$17684390003** |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;(a) Non-income producing security.

&nbsp;&nbsp;&nbsp;&nbsp;(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 $148,618,114 and $17,587,487,565, respectively.

&nbsp;&nbsp;&nbsp;&nbsp;(j) The rate quoted is the annualized seven-day yield of the fund at period end.

&nbsp;&nbsp;&nbsp;&nbsp;(l) A portion of this security is on loan.

&nbsp;&nbsp;&nbsp;&nbsp;(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.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | |
|:---|:---|
| The following abbreviations are used in this report and are defined: | The following abbreviations are used in this report and are defined: |
| ADR | American Depositary Receipt |
| GDR | Global Depositary Receipt |
| Abbreviations indicate amounts shown in currencies other than the U.S. dollar. All amounts are stated in U.S. dollars unless otherwise <br> indicated. A list of abbreviations is shown below: | Abbreviations indicate amounts shown in currencies other than the U.S. dollar. All amounts are stated in U.S. dollars unless otherwise <br> indicated. A list of abbreviations is shown below: |
| CAD | Canadian Dollar |

---

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

------

**Supplemental Information**

11/30/25 (unaudited)

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.

**(1) Investment Valuations**

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

Under the fund's valuation policy and procedures, equity securities, including restricted equity securities, are generally valued at the last sale or official closing price on their primary market or exchange as provided by a third-party pricing service. Equity securities, for which there were no sales reported that day, are generally valued at the last quoted daily bid quotation on their primary market or exchange as provided

by a third-party pricing service. Short-term instruments with a maturity at issuance of 60 days or less may be valued at amortized cost, which

approximates market value. Open-end investment companies are generally valued at net asset value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

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

------

*Supplemental Information (unaudited) – continued*

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 November 30, 2025 in valuing the fund's assets and liabilities:

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Financial Instruments** | **Level 1** | **Level 2** | **Level 3** | **Total** |
| Equity Securities: |  |  |  |  |
| &nbsp;&nbsp;&nbsp; Japan | &nbsp;&nbsp;&nbsp; $3724280379 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $3724280379 |
| &nbsp;&nbsp;&nbsp; United Kingdom | &nbsp;&nbsp;&nbsp; 2901642116 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 2901642116 |
| &nbsp;&nbsp;&nbsp; France | &nbsp;&nbsp;&nbsp; 2391671361 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 2391671361 |
| &nbsp;&nbsp;&nbsp; Switzerland | &nbsp;&nbsp;&nbsp; 1115371601 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 1115371601 |
| &nbsp;&nbsp;&nbsp; Germany | &nbsp;&nbsp;&nbsp; 1076340248 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 1076340248 |
| &nbsp;&nbsp;&nbsp; United States | &nbsp;&nbsp;&nbsp; 953894361 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 953894361 |
| &nbsp;&nbsp;&nbsp; Netherlands | &nbsp;&nbsp;&nbsp; 868289532 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 868289532 |
| &nbsp;&nbsp;&nbsp; Canada | &nbsp;&nbsp;&nbsp; 555813320 | &nbsp;&nbsp;&nbsp; 0 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 555813320 |
| &nbsp;&nbsp;&nbsp; Australia | &nbsp;&nbsp;&nbsp; 433396344 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 433396344 |
| &nbsp;&nbsp;&nbsp; Other Countries | &nbsp;&nbsp;&nbsp; 3395317507 | &nbsp;&nbsp;&nbsp; 93948008 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 3489265515 |
| Investment Companies | &nbsp;&nbsp;&nbsp; 226140902 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 226140902 |
| Total | &nbsp;&nbsp;&nbsp; $17642157671 | &nbsp;&nbsp;&nbsp; $93948008 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $17736105679 |

---

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

**(2) 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 period ended November 30, 2025:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| **Affiliated Issuers** | **Beginning** <br>**Value**<br>| **Purchases** | **Sales** <br>**Proceeds**<br>| **Realized** <br>**Gain** <br>**(Loss)**<br>| **Change in** <br>**Unrealized** <br>**Appreciation or** <br>**Depreciation**<br>| **Ending** <br>**Value**<br>|
| MFS Institutional Money Market Portfolio  | $290703125 | &nbsp;&nbsp; $607111571 | &nbsp;&nbsp; $749225279 | &nbsp;&nbsp; $30385 | &nbsp;&nbsp; $(1688)<br>| &nbsp;&nbsp; $148618114<br>|

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| **Affiliated Issuers** | **Dividend** <br>**Income**<br>| **Capital Gain** <br>**Distributions**<br>|
| MFS Institutional Money Market Portfolio  | &nbsp;&nbsp; $2866769 | &nbsp;&nbsp; $— |

---

**(3) Issuer Country Weightings**

Issuer country weighting percentages of portfolio holdings based on net assets, as of November 30, 2025, are as follows:

---

| | |
|:---|:---|
| Japan | 21.1% |
| United Kingdom | 16.4% |
| France | 13.5% |
| Switzerland | 6.3% |
| United States | 6.2% |
| Germany | 6.1% |
| Netherlands | 4.9% |
| Canada | 3.1% |
| Australia | 2.5% |
| Other Countries | 19.9% |

---

------

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** MFS SERIES TRUST I

- **b. Investment Company Act file number:** 811-04777

- **c. CIK number of Registrant:** 0000798244

- **d. LEI of Registrant:** 549300QRB5FQ35HH3533

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** 111 HUNTINGTON AVENUE

  - **City:** BOSTON

  - **State:** MA

  - **Foreign country:** US

  - **Zip / Postal Code:** 02199

  - **Telephone number:** 617-954-5000

**Item A.2. Information about the Series.**

- **a. Name of Series:** MFS Research International Fund

- **b. EDGAR series identifier (if any):** S000000766

- **c. LEI of Series:** UH91KW1VFNZQF5FY7237

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2026-08-31

- **b. Date as of which information is reported:** 2025-11-30

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $17826430780.07

**Total Liabilities:** $137213007.19

**Net Assets:** $17689217772.88

**Cash Not Reported:** $63239.44

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000002223 | 2.05%                | 0.72%                | 0.98%                |
| Class ID C000002224 | 2.08%                | 0.72%                | 1.01%                |
| Class ID C000002228 | 1.99%                | 0.66%                | 0.93%                |
| Class ID C000002229 | 1.99%                | 0.65%                | 0.93%                |
| Class ID C000002230 | 2.04%                | 0.77%                | 1.01%                |
| Class ID C000002232 | 1.99%                | 0.66%                | 0.91%                |
| Class ID C000002234 | 2.01%                | 0.71%                | 0.98%                |
| Class ID C000002235 | 2.04%                | 0.73%                | 0.99%                |
| Class ID C000034436 | 2.06%                | 0.76%                | 1.02%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $48782198.58             | $254088732.20                              |
| Month 2  | $334448618.71            | $-218425516.95                             |
| Month 3  | $165998233.14            | $8963956.91                                |

### Schedule of Portfolio Investments

| Name                                         | Title                                        | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   | Fair Value Level   | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| Alimentation Couche-Tard Inc                 | Alimentation Couche-Tard Inc                 | CUSIP: 01626P148<br>LEI: 549300OSW32RVX8CCZ87 | Long             | EC               | CORP              | CA        |    860932 | NS      | $46870876.64  | 0.26%             |  |  |  | No            | 1                  | On Loan: No      |
| British American Tobacco PLC                 | British American Tobacco PLC                 | CUSIP: 000000000<br>LEI: 213800FKA5MF17RJKT63 | Long             | EC               | CORP              | GB        |   4566618 | NS      | $267242099.20 | 1.51%             |  |  |  | No            | 1                  | On Loan: No      |
| Banco Bradesco SA                            | Banco Bradesco SA                            | CUSIP: 059460303<br>LEI: 549300CTUU1RFXHQJE44 | Long             | EC               | CORP              | BR        |  39946895 | NS      | $147803511.50 | 0.84%             |  |  |  | No            | 1                  | On Loan: No      |
| Rio Tinto PLC                                | Rio Tinto PLC                                | CUSIP: 000000000<br>LEI: 213800YOEO5OQ72G2R82 | Long             | EC               | CORP              | GB        |   1937124 | NS      | $139029387.84 | 0.79%             |  |  |  | No            | 1                  | On Loan: No      |
| Weir Group PLC/The                           | Weir Group PLC/The                           | CUSIP: 000000000<br>LEI: 549300KDR56WHY9I3D10 | Long             | EC               | CORP              | GB        |   3280838 | NS      | $120383700.17 | 0.68%             |  |  |  | No            | 1                  | On Loan: No      |
| Babcock International Group PLC              | Babcock International Group PLC              | CUSIP: 000000000<br>LEI: 213800TSKOLX4EU6L377 | Long             | EC               | CORP              | GB        |   5333618 | NS      | $79991067.59  | 0.45%             |  |  |  | No            | 1                  | On Loan: No      |
| Cadence Design Systems Inc                   | Cadence Design Systems Inc                   | CUSIP: 127387108<br>LEI: GCT7RXJOGLXPV0NXZY22 | Long             | EC               | CORP              | US        |    500484 | NS      | $156070930.56 | 0.88%             |  |  |  | No            | 1                  | On Loan: No      |
| Constellation Software Inc/Canada            | Constellation Software Inc/Canada            | CUSIP: 21037X100<br>LEI: 549300B6PYHMCTDWQV29 | Long             | EC               | CORP              | CA        |     68876 | NS      | $168561250.85 | 0.95%             |  |  |  | No            | 1                  | On Loan: No      |
| CONSTELLATION SOFTWARE INC                   | CONSTELLATION SOFTWARE INC                   | CUSIP: 000000000<br>LEI: 549300B6PYHMCTDWQV29 | N/A              | DE               |  | CA        |    105955 | NS      | $0.00         | 0.00%             |  |  |  | No            | 2                  | On Loan: No      |
| Barclays PLC                                 | Barclays PLC                                 | CUSIP: 000000000<br>LEI: 213800LBQA1Y9L22JB70 | Long             | EC               | CORP              | GB        |  61094947 | NS      | $347949203.62 | 1.97%             |  |  |  | No            | 1                  | On Loan: No      |
| Burberry Group PLC                           | Burberry Group PLC                           | CUSIP: 000000000<br>LEI: 213800PE1KEFCNFR1R50 | Long             | EC               | CORP              | GB        |   2535071 | NS      | $38237908.73  | 0.22%             |  |  |  | No            | 1                  | On Loan: No      |
| Next PLC                                     | Next PLC                                     | CUSIP: 000000000<br>LEI: 213800WQD8ECPZP9PH98 | Long             | EC               | CORP              | GB        |    614314 | NS      | $114819270.96 | 0.65%             |  |  |  | No            | 1                  | On Loan: No      |
| LVMH Moet Hennessy Louis Vuitton SE          | LVMH Moet Hennessy Louis Vuitton SE          | CUSIP: 000000000<br>LEI: IOG4E947OATN0KJYSD45 | Long             | EC               | CORP              | FR        |    339765 | NS      | $250543516.60 | 1.42%             |  |  |  | No            | 1                  | On Loan: No      |
| Thales SA                                    | Thales SA                                    | CUSIP: 000000000<br>LEI: 529900FNDVTQJOVVPZ19 | Long             | EC               | CORP              | FR        |    649713 | NS      | $169927803.26 | 0.96%             |  |  |  | No            | 1                  | On Loan: No      |
| GEA Group AG                                 | GEA Group AG                                 | CUSIP: 000000000<br>LEI: 549300PHUU0ZZWO8EO07 | Long             | EC               | CORP              | DE        |   1832739 | NS      | $124194522.92 | 0.70%             |  |  |  | No            | 1                  | On Loan: No      |
| Pernod Ricard SA                             | Pernod Ricard SA                             | CUSIP: 000000000<br>LEI: 52990097YFPX9J0H5D87 | Long             | EC               | CORP              | FR        |   1804295 | NS      | $162422539.22 | 0.92%             |  |  |  | No            | 1                  | On Loan: No      |
| Merck KGaA                                   | Merck KGaA                                   | CUSIP: 000000000<br>LEI: 529900OAREIS0MOPTW25 | Long             | EC               | CORP              | DE        |   1091236 | NS      | $146881009.60 | 0.83%             |  |  |  | No            | 1                  | On Loan: No      |
| Schneider Electric SE                        | Schneider Electric SE                        | CUSIP: 000000000<br>LEI: 969500A1YF1XUYYXS284 | Long             | EC               | CORP              | FR        |   1756326 | NS      | $470767079.48 | 2.66%             |  |  |  | No            | 1                  | On Loan: No      |
| SAP SE                                       | SAP SE                                       | CUSIP: 000000000<br>LEI: 529900D6BF99LW9R2E68 | Long             | EC               | CORP              | DE        |    111434 | NS      | $26966022.29  | 0.15%             |  |  |  | No            | 1                  | On Loan: No      |
| E.ON SE                                      | E.ON SE                                      | CUSIP: 000000000<br>LEI: Q9MAIUP40P25UFBFG033 | Long             | EC               | CORP              | DE        |   6245926 | NS      | $111248506.46 | 0.63%             |  |  |  | No            | 1                  | On Loan: No      |
| Hellenic Telecommunications Organization SA  | Hellenic Telecommunications Organization SA  | CUSIP: 000000000<br>LEI: ELPUFM0XZRZO4LFXW404 | Long             | EC               | CORP              | GR        |   1442864 | NS      | $28646026.02  | 0.16%             |  |  |  | No            | 1                  | On Loan: No      |
| Beiersdorf AG                                | Beiersdorf AG                                | CUSIP: 000000000<br>LEI: L47NHHI0Z9X22DV46U41 | Long             | EC               | CORP              | DE        |   1482812 | NS      | $159429014.92 | 0.90%             |  |  |  | No            | 1                  | On Loan: No      |
| Erste Group Bank AG                          | Erste Group Bank AG                          | CUSIP: 000000000<br>LEI: PQOH26KWDF7CG10L6792 | Long             | EC               | CORP              | AT        |   1099087 | NS      | $120071896.50 | 0.68%             |  |  |  | No            | 1                  | On Loan: No      |
| MFS Institutional Money Market Portfolio     | MFS Institutional Money Market Portfolio     | CUSIP: 55291X109<br>LEI: 5L2W638H85N8T1136O07 | Long             | EC               | RF                | US        | 147819348 | NS      | $147848911.64 | 0.84%             |  |  |  | No            | 1                  | On Loan: No      |
| Wolters Kluwer NV                            | Wolters Kluwer NV                            | CUSIP: 000000000<br>LEI: 724500TEM53I0U077B74 | Long             | EC               | CORP              | NL        |   1006263 | NS      | $106953734.30 | 0.60%             |  |  |  | No            | 1                  | On Loan: No      |
| Sanofi SA                                    | Sanofi SA                                    | CUSIP: 000000000<br>LEI: 549300E9PC51EN656011 | Long             | EC               | CORP              | FR        |   1974769 | NS      | $196512440.04 | 1.11%             |  |  |  | No            | 1                  | On Loan: No      |
| Mastercard Inc                               | Mastercard Inc                               | CUSIP: 57636Q104<br>LEI: AR5L2ODV9HN37376R084 | Long             | EC               | CORP              | US        |    367815 | NS      | $202493191.95 | 1.14%             |  |  |  | No            | 1                  | On Loan: No      |
| Accor SA                                     | Accor SA                                     | CUSIP: 000000000<br>LEI: 969500QZC2Q0TK11NV07 | Long             | EC               | CORP              | FR        |   1649463 | NS      | $89228547.23  | 0.50%             |  |  |  | No            | 1                  | On Loan: No      |
| Koninklijke KPN NV                           | Koninklijke KPN NV                           | CUSIP: 000000000<br>LEI: 549300YO0JZHAL7FVP81 | Long             | EC               | CORP              | NL        |  24686944 | NS      | $112863243.90 | 0.64%             |  |  |  | No            | 1                  | On Loan: No      |
| CLP Holdings Ltd                             | CLP Holdings Ltd                             | CUSIP: 000000000<br>LEI: 25490002BUTSMP94GO68 | Long             | EC               | CORP              | HK        |   6306000 | NS      | $55076711.64  | 0.31%             |  |  |  | No            | 1                  | On Loan: No      |
| Reliance Industries Ltd                      | Reliance Industries Ltd                      | CUSIP: 000000000<br>LEI: 5493003UOETFYRONLG31 | Long             | EC               | CORP              | IN        |   5610542 | NS      | $98320518.57  | 0.56%             |  |  |  | No            | 1                  | On Loan: No      |
| Samsung Fire & Marine Insurance Co Ltd       | Samsung Fire & Marine Insurance Co Ltd       | CUSIP: 000000000<br>LEI: 988400JMBDK47EW0Z936 | Long             | EC               | CORP              | KR        |    209622 | NS      | $68631552.71  | 0.39%             |  |  |  | No            | 1                  | On Loan: No      |
| Capcom Co Ltd                                | Capcom Co Ltd                                | CUSIP: 000000000<br>LEI: 529900JJWQKXS3TC8744 | Long             | EC               | CORP              | JP        |   1752500 | NS      | $42891120.64  | 0.24%             |  |  |  | No            | 1                  | On Loan: No      |
| CSL Ltd                                      | CSL Ltd                                      | CUSIP: 000000000<br>LEI: 529900ECSECK5ZDQTE14 | Long             | EC               | CORP              | AU        |   1165788 | NS      | $142289608.01 | 0.80%             |  |  |  | No            | 1                  | On Loan: No      |
| APA Group                                    | APA Group                                    | CUSIP: 000000000<br>LEI: 549300T9RBSX164T8H40 | Long             | EC               | CORP              | AU        |   8684873 | NS      | $52688423.75  | 0.30%             |  |  |  | No            | 1                  | On Loan: No      |
| KDDI Corp                                    | KDDI Corp                                    | CUSIP: 000000000<br>LEI: 5299003FU7V4I45FU310 | Long             | EC               | CORP              | JP        |   9849600 | NS      | $169588036.23 | 0.96%             |  |  |  | No            | 1                  | On Loan: No      |
| Daikin Industries Ltd                        | Daikin Industries Ltd                        | CUSIP: 000000000<br>LEI: 549300Y7FWSTSHMW5Y57 | Long             | EC               | CORP              | JP        |   1076600 | NS      | $139808783.33 | 0.79%             |  |  |  | No            | 1                  | On Loan: No      |
| Aristocrat Leisure Ltd                       | Aristocrat Leisure Ltd                       | CUSIP: 000000000<br>LEI: 529900TE2HO3OZKYKC27 | Long             | EC               | CORP              | AU        |   2008983 | NS      | $76786245.66  | 0.43%             |  |  |  | No            | 1                  | On Loan: No      |
| Pan Pacific International Holdings Corp      | Pan Pacific International Holdings Corp      | CUSIP: 000000000<br>LEI: 529900QLHJM2E18A5763 | Long             | EC               | CORP              | JP        |  22512400 | NS      | $136496872.96 | 0.77%             |  |  |  | No            | 1                  | On Loan: No      |
| Disco Corp                                   | Disco Corp                                   | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | JP        |    127300 | NS      | $35637969.34  | 0.20%             |  |  |  | No            | 1                  | On Loan: No      |
| FUJIFILM Holdings Corp                       | FUJIFILM Holdings Corp                       | CUSIP: 000000000<br>LEI: 529900UBKMFM0ST6H474 | Long             | EC               | CORP              | JP        |   3547400 | NS      | $76305265.52  | 0.43%             |  |  |  | No            | 1                  | On Loan: No      |
| Fujitsu Ltd                                  | Fujitsu Ltd                                  | CUSIP: 000000000<br>LEI: 3538000246DHJLRTUZ24 | Long             | EC               | CORP              | JP        |   5283400 | NS      | $140266059.35 | 0.79%             |  |  |  | No            | 1                  | On Loan: No      |
| Advanced Info Service PCL                    | Advanced Info Service PCL                    | CUSIP: 000000000<br>LEI: 529900DU2YW1NO5RMU78 | Long             | EC               | CORP              | TH        |   9852300 | NS      | $93948007.45  | 0.53%             |  |  |  | No            | 2                  | On Loan: No      |
| James Hardie Industries PLC                  | James Hardie Industries PLC                  | CUSIP: 000000000<br>LEI: 635400NSGXKTVOO7JU45 | Long             | EC               | CORP              | IE        |   4762749 | NS      | $94763967.23  | 0.54%             |  |  |  | No            | 1                  | On Loan: No      |
| Hitachi Ltd                                  | Hitachi Ltd                                  | CUSIP: 000000000<br>LEI: 549300T6IPOCDWLKC615 | Long             | EC               | CORP              | JP        |  14791900 | NS      | $470446907.59 | 2.66%             |  |  |  | No            | 1                  | On Loan: No      |
| Kao Corp                                     | Kao Corp                                     | CUSIP: 000000000<br>LEI: 353800HM38HFCB8RGL63 | Long             | EC               | CORP              | JP        |   2043600 | NS      | $82604848.76  | 0.47%             |  |  |  | No            | 1                  | On Loan: No      |
| Keyence Corp                                 | Keyence Corp                                 | CUSIP: 000000000<br>LEI: 529900M7PQBS7A89DZ11 | Long             | EC               | CORP              | JP        |    375900 | NS      | $127878915.53 | 0.72%             |  |  |  | No            | 1                  | On Loan: No      |
| Kirin Holdings Co Ltd                        | Kirin Holdings Co Ltd                        | CUSIP: 000000000<br>LEI: 353800GBVL72LLMTYM96 | Long             | EC               | CORP              | JP        |   6321600 | NS      | $99292888.19  | 0.56%             |  |  |  | No            | 1                  | On Loan: No      |
| China Resources Gas Group Ltd                | China Resources Gas Group Ltd                | CUSIP: 000000000<br>LEI: 529900A0E1J5JSOKEK83 | Long             | EC               | CORP              | BM        |  15742900 | NS      | $46142965.33  | 0.26%             |  |  |  | No            | 1                  | On Loan: No      |
| Mizuho Financial Group Inc                   | Mizuho Financial Group Inc                   | CUSIP: 000000000<br>LEI: 353800CI5L6DDAN5XZ33 | Long             | EC               | CORP              | JP        |  13540300 | NS      | $474415427.80 | 2.68%             |  |  |  | No            | 1                  | On Loan: No      |
| Mitsubishi Electric Corp                     | Mitsubishi Electric Corp                     | CUSIP: 000000000<br>LEI: 549300TRXM9Y6561AX39 | Long             | EC               | CORP              | JP        |   5940900 | NS      | $160612148.78 | 0.91%             |  |  |  | No            | 1                  | On Loan: No      |
| Mitsui & Co Ltd                              | Mitsui & Co Ltd                              | CUSIP: 000000000<br>LEI: 2NRSB4GOU9DD6CNW5R48 | Long             | EC               | CORP              | JP        |   6488200 | NS      | $172251627.03 | 0.97%             |  |  |  | No            | 1                  | On Loan: No      |
| Nitori Holdings Co Ltd                       | Nitori Holdings Co Ltd                       | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | JP        |   2612000 | NS      | $45181805.96  | 0.26%             |  |  |  | No            | 1                  | On Loan: No      |
| Qantas Airways Ltd                           | Qantas Airways Ltd                           | CUSIP: 000000000<br>LEI: YLXNW6TI6QSK1H8H0N82 | Long             | EC               | CORP              | AU        |  10242186 | NS      | $66967478.54  | 0.38%             |  |  |  | No            | 1                  | On Loan: No      |
| Samsung Electronics Co Ltd                   | Samsung Electronics Co Ltd                   | CUSIP: 000000000<br>LEI: 9884007ER46L6N7EI764 | Long             | EC               | CORP              | KR        |   2047108 | NS      | $139893485.19 | 0.79%             |  |  |  | No            | 1                  | On Loan: No      |
| Shin-Etsu Chemical Co Ltd                    | Shin-Etsu Chemical Co Ltd                    | CUSIP: 000000000<br>LEI: 353800PX8Q64N86H5W41 | Long             | EC               | CORP              | JP        |   4643100 | NS      | $139764131.75 | 0.79%             |  |  |  | No            | 1                  | On Loan: No      |
| Sony Group Corp                              | Sony Group Corp                              | CUSIP: 000000000<br>LEI: 529900R5WX9N2OI2N910 | Long             | EC               | CORP              | JP        |   7984900 | NS      | $233865225.18 | 1.32%             |  |  |  | No            | 1                  | On Loan: No      |
| Suzuki Motor Corp                            | Suzuki Motor Corp                            | CUSIP: 000000000<br>LEI: 353800D83H0V3ZV1SV24 | Long             | EC               | CORP              | JP        |  11007500 | NS      | $172013107.78 | 0.97%             |  |  |  | No            | 1                  | On Loan: No      |
| Taisei Corp                                  | Taisei Corp                                  | CUSIP: 000000000<br>LEI: 529900TF7XJKIOWMLQ79 | Long             | EC               | CORP              | JP        |   1513200 | NS      | $129325053.62 | 0.73%             |  |  |  | No            | 1                  | On Loan: No      |
| Terumo Corp                                  | Terumo Corp                                  | CUSIP: 000000000<br>LEI: 353800JX1R4582QVK932 | Long             | EC               | CORP              | JP        |   4881800 | NS      | $76256150.57  | 0.43%             |  |  |  | No            | 1                  | On Loan: No      |
| Taiwan Semiconductor Manufacturing Co Ltd    | Taiwan Semiconductor Manufacturing Co Ltd    | CUSIP: 000000000<br>LEI: 549300KB6NK5SBD14S87 | Long             | EC               | CORP              | TW        |   6304326 | NS      | $289253765.81 | 1.64%             |  |  |  | No            | 1                  | On Loan: No      |
| Tokyo Electron Ltd                           | Tokyo Electron Ltd                           | CUSIP: 000000000<br>LEI: 549300H5LSF8DP3RIJ34 | Long             | EC               | CORP              | JP        |    919600 | NS      | $187210908.74 | 1.06%             |  |  |  | No            | 1                  | On Loan: No      |
| Toyota Industries Corp                       | Toyota Industries Corp                       | CUSIP: 000000000<br>LEI: 35380000WKGEAHEMW830 | Long             | EC               | CORP              | JP        |    809800 | NS      | $90620044.17  | 0.51%             |  |  |  | No            | 1                  | On Loan: No      |
| Roche Holding AG                             | Roche Holding AG                             | CUSIP: 000000000<br>LEI: 549300U41AUUVOAAOB37 | Long             | EC               | CORP              | CH        |   1332096 | NS      | $509882094.88 | 2.88%             |  |  |  | No            | 1                  | On Loan: No      |
| Eni SpA                                      | Eni SpA                                      | CUSIP: 000000000<br>LEI: BUCRF72VH5RBN7X3VL35 | Long             | EC               | CORP              | IT        |   9538870 | NS      | $178555864.28 | 1.01%             |  |  |  | No            | 1                  | On Loan: —       |
| BNP Paribas SA                               | BNP Paribas SA                               | CUSIP: 000000000<br>LEI: R0MUWSFPU8MPRO8K5P83 | Long             | EC               | CORP              | FR        |   2140025 | NS      | $182985374.08 | 1.03%             |  |  |  | No            | 1                  | On Loan: No      |
| RB Global Inc                                | RB Global Inc                                | CUSIP: 74935Q107<br>LEI: 5493002H8U24DJXQ4886 | Long             | EC               | CORP              | CA        |   1202326 | NS      | $118189217.95 | 0.67%             |  |  |  | No            | 1                  | On Loan: No      |
| Ryanair Holdings PLC                         | Ryanair Holdings PLC                         | CUSIP: 783513203<br>LEI: 635400BR2ROC1FVEBQ56 | Long             | EC               | CORP              | IE        |    945926 | NS      | $64474316.16  | 0.36%             |  |  |  | No            | 1                  | On Loan: No      |
| Toronto-Dominion Bank/The                    | Toronto-Dominion Bank/The                    | CUSIP: 891160509<br>LEI: PT3QB789TSUIDF371261 | Long             | EC               | CORP              | CA        |   2662859 | NS      | $223650048.90 | 1.26%             |  |  |  | No            | 1                  | On Loan: No      |
| JP Morgan US Government Money Market Fund    | JP Morgan US Government Money Market Fund    | CUSIP: 4812C2270<br>LEI: 549300NQ5E5B7ZV4T516 | Long             | STIV             | RF                | US        |  77522788 | NS      | $77522788.00  | 0.44%             |  |  |  | No            | 1                  | On Loan: No      |
| ASML Holding NV                              | ASML Holding NV                              | CUSIP: 000000000<br>LEI: 724500Y6DUVHQD6OXN27 | Long             | EC               | CORP              | NL        |    268878 | NS      | $281854082.75 | 1.59%             |  |  |  | No            | 1                  | On Loan: No      |
| Cie Financiere Richemont SA                  | Cie Financiere Richemont SA                  | CUSIP: 000000000<br>LEI: 549300YIPGJ6UX2QPS51 | Long             | EC               | CORP              | CH        |    907836 | NS      | $192509613.75 | 1.09%             |  |  |  | No            | 1                  | On Loan: No      |
| UBS Group AG                                 | UBS Group AG                                 | CUSIP: 000000000<br>LEI: 549300SZJ9VS8SGXAN81 | Long             | EC               | CORP              | CH        |   5640060 | NS      | $217849161.00 | 1.23%             |  |  |  | No            | 1                  | On Loan: No      |
| Sika AG                                      | Sika AG                                      | CUSIP: 000000000<br>LEI: 549300R3N69ECGYPU434 | Long             | EC               | CORP              | CH        |    446290 | NS      | $87940969.37  | 0.50%             |  |  |  | No            | 1                  | On Loan: No      |
| Alcon AG                                     | Alcon AG                                     | CUSIP: 000000000<br>LEI: 549300LDT5AP8S0NBM78 | Long             | EC               | CORP              | CH        |   1351506 | NS      | $107467529.77 | 0.61%             |  |  |  | No            | 1                  | On Loan: No      |
| Techtronic Industries Co Ltd                 | Techtronic Industries Co Ltd                 | CUSIP: 000000000<br>LEI: 549300HZW2SBE758OK89 | Long             | EC               | CORP              | HK        |  10357000 | NS      | $121187402.46 | 0.69%             |  |  |  | No            | 1                  | On Loan: No      |
| MTU Aero Engines AG                          | MTU Aero Engines AG                          | CUSIP: 000000000<br>LEI: 529900807L67JY81RD65 | Long             | EC               | CORP              | DE        |    536808 | NS      | $219442426.80 | 1.24%             |  |  |  | No            | 1                  | On Loan: No      |
| Daiichi Sankyo Co Ltd                        | Daiichi Sankyo Co Ltd                        | CUSIP: 000000000<br>LEI: 353800XGIU2IHQGC9504 | Long             | EC               | CORP              | JP        |   8453300 | NS      | $209106950.48 | 1.18%             |  |  |  | No            | 1                  | On Loan: No      |
| London Stock Exchange Group PLC              | London Stock Exchange Group PLC              | CUSIP: 000000000<br>LEI: 213800QAUUUP6I445N30 | Long             | EC               | CORP              | GB        |   1492783 | NS      | $176021843.23 | 1.00%             |  |  |  | No            | 1                  | On Loan: No      |
| Legrand SA                                   | Legrand SA                                   | CUSIP: 000000000<br>LEI: 969500XXRPGD7HCAFA90 | Long             | EC               | CORP              | FR        |   1526946 | NS      | $231307401.41 | 1.31%             |  |  |  | No            | 1                  | On Loan: No      |
| TotalEnergies SE                             | TotalEnergies SE                             | CUSIP: 000000000<br>LEI: 529900S21EQ1BO4ESM68 | Long             | EC               | CORP              | FR        |   4164424 | NS      | $274468337.18 | 1.55%             |  |  |  | No            | 1                  | On Loan: No      |
| Galp Energia SGPS SA                         | Galp Energia SGPS SA                         | CUSIP: 000000000<br>LEI: 2138003319Y7NM75FG53 | Long             | EC               | CORP              | PT        |   8791820 | NS      | $177150568.51 | 1.00%             |  |  |  | No            | 1                  | On Loan: No      |
| Symrise AG                                   | Symrise AG                                   | CUSIP: 000000000<br>LEI: 529900D82I6R9601CF26 | Long             | EC               | CORP              | DE        |   1124128 | NS      | $93185037.89  | 0.53%             |  |  |  | No            | 1                  | On Loan: No      |
| Jeronimo Martins SGPS SA                     | Jeronimo Martins SGPS SA                     | CUSIP: 000000000<br>LEI: 259400A8SZP10GB5IB19 | Long             | EC               | CORP              | PT        |   4374134 | NS      | $103743751.76 | 0.59%             |  |  |  | No            | 1                  | On Loan: No      |
| Amadeus IT Group SA                          | Amadeus IT Group SA                          | CUSIP: 000000000<br>LEI: 9598004A3FTY3TEHHN09 | Long             | EC               | CORP              | ES        |   1959300 | NS      | $144001817.11 | 0.81%             |  |  |  | No            | 1                  | On Loan: No      |
| Glencore PLC                                 | Glencore PLC                                 | CUSIP: 000000000<br>LEI: 2138002658CPO9NBH955 | Long             | EC               | CORP              | JE        |  31109464 | NS      | $148576024.23 | 0.84%             |  |  |  | No            | 1                  | On Loan: No      |
| AIA Group Ltd                                | AIA Group Ltd                                | CUSIP: 000000000<br>LEI: ZP5ILWVSYE4LJGMMVD57 | Long             | EC               | CORP              | HK        |  18281400 | NS      | $189255982.48 | 1.07%             |  |  |  | No            | 1                  | On Loan: No      |
| Sands China Ltd                              | Sands China Ltd                              | CUSIP: 000000000<br>LEI: 549300EVO6UZDGY05787 | Long             | EC               | CORP              | KY        |  16470800 | NS      | $44849300.96  | 0.25%             |  |  |  | No            | 1                  | On Loan: No      |
| Sompo Holdings Inc                           | Sompo Holdings Inc                           | CUSIP: 000000000<br>LEI: 353800CWW4SRGEYEB512 | Long             | EC               | CORP              | JP        |   3497200 | NS      | $110890378.67 | 0.63%             |  |  |  | No            | 1                  | On Loan: No      |
| Novonesis Novozymes B                        | Novonesis Novozymes B                        | CUSIP: 000000000<br>LEI: 529900T6WNZXD2R3JW38 | Long             | EC               | CORP              | DK        |   1407055 | NS      | $87795422.49  | 0.50%             |  |  |  | No            | 1                  | On Loan: No      |
| LEG Immobilien SE                            | LEG Immobilien SE                            | CUSIP: 000000000<br>LEI: 391200SO40AKONBO0Z96 | Long             | EC               | CORP              | DE        |    655247 | NS      | $49268463.89  | 0.28%             |  |  |  | No            | 1                  | On Loan: No      |
| Bank of Ireland Group PLC                    | Bank of Ireland Group PLC                    | CUSIP: 000000000<br>LEI: 635400C8EK6DRI12LJ39 | Long             | EC               | CORP              | IE        |  17591738 | NS      | $325784644.25 | 1.84%             |  |  |  | No            | 1                  | On Loan: No      |
| Convatec Group PLC                           | Convatec Group PLC                           | CUSIP: 000000000<br>LEI: 213800LS272L4FIDOH92 | Long             | EC               | CORP              | GB        |  36419613 | NS      | $113579587.79 | 0.64%             |  |  |  | No            | 1                  | On Loan: No      |
| National Grid PLC                            | National Grid PLC                            | CUSIP: 000000000<br>LEI: 8R95QZMKZLJX5Q2XR704 | Long             | EC               | CORP              | GB        |  14440982 | NS      | $219159580.85 | 1.24%             |  |  |  | No            | 1                  | On Loan: No      |
| B3 SA - Brasil Bolsa Balcao                  | B3 SA - Brasil Bolsa Balcao                  | CUSIP: 000000000<br>LEI: 4GTK5S46E6H318LMDS44 | Long             | EC               | CORP              | BR        |  45637600 | NS      | $128760129.27 | 0.73%             |  |  |  | No            | 1                  | On Loan: No      |
| Akzo Nobel NV                                | Akzo Nobel NV                                | CUSIP: 000000000<br>LEI: 724500XYIJUGXAA5QD70 | Long             | EC               | CORP              | NL        |   1262021 | NS      | $82064189.21  | 0.46%             |  |  |  | No            | 1                  | On Loan: No      |
| Croda International PLC                      | Croda International PLC                      | CUSIP: 000000000<br>LEI: 2138004WCNBFJEEOXV26 | Long             | EC               | CORP              | GB        |   2365840 | NS      | $85243871.66  | 0.48%             |  |  |  | No            | 1                  | On Loan: No      |
| HDFC Bank Ltd                                | HDFC Bank Ltd                                | CUSIP: 000000000<br>LEI: 335800ZQ6I4E2JXENC50 | Long             | EC               | CORP              | IN        |  16177602 | NS      | $182235968.31 | 1.03%             |  |  |  | No            | 1                  | On Loan: No      |
| Atlas Copco AB                               | Atlas Copco AB                               | CUSIP: 000000000<br>LEI: 213800T8PC8Q4FYJZR07 | Long             | EC               | CORP              | SE        |   9760273 | NS      | $165614965.83 | 0.94%             |  |  |  | No            | 1                  | On Loan: No      |
| NatWest Group PLC                            | NatWest Group PLC                            | CUSIP: 000000000<br>LEI: 2138005O9XJIJN4JPN90 | Long             | EC               | CORP              | GB        |  42800728 | NS      | $358175044.04 | 2.02%             |  |  |  | No            | 1                  | On Loan: No      |
| Davide Campari-Milano NV                     | Davide Campari-Milano NV                     | CUSIP: 000000000<br>LEI: 213800ED5AN2J56N6Z02 | Long             | EC               | CORP              | NL        |  16409367 | NS      | $111692204.21 | 0.63%             |  |  |  | No            | 1                  | On Loan: No      |
| Haleon PLC                                   | Haleon PLC                                   | CUSIP: 000000000<br>LEI: 549300PSB3WWEODCUP19 | Long             | EC               | CORP              | GB        |  49942031 | NS      | $245195620.38 | 1.39%             |  |  |  | No            | 1                  | On Loan: No      |
| Euronext NV                                  | Euronext NV                                  | CUSIP: 000000000<br>LEI: 724500QJ4QSZ3H9QU415 | Long             | EC               | CORP              | NL        |   1816893 | NS      | $278919045.75 | 1.58%             |  |  |  | No            | 1                  | On Loan: No      |
| QIAGEN NV                                    | QIAGEN NV                                    | CUSIP: 000000000<br>LEI: 54930036WK3GMCN17Z57 | Long             | EC               | CORP              | NL        |   3060600 | NS      | $146049965.83 | 0.83%             |  |  |  | No            | 1                  | On Loan: No      |
| Novo Nordisk A/S                             | Novo Nordisk A/S                             | CUSIP: 000000000<br>LEI: 549300DAQ1CVT6CXN342 | Long             | EC               | CORP              | DK        |   2759988 | NS      | $135935707.28 | 0.77%             |  |  |  | No            | 1                  | On Loan: No      |
| Cie Generale des Etablissements Michelin SCA | Cie Generale des Etablissements Michelin SCA | CUSIP: 000000000<br>LEI: 549300SOSI58J6VIW052 | Long             | EC               | CORP              | FR        |   2611781 | NS      | $85310823.11  | 0.48%             |  |  |  | No            | 1                  | On Loan: No      |
| Hiscox Ltd                                   | Hiscox Ltd                                   | CUSIP: 000000000<br>LEI: 5493007JXOLJ0QCY2D70 | Long             | EC               | CORP              | BM        |   8178208 | NS      | $145061654.25 | 0.82%             |  |  |  | No            | 1                  | On Loan: No      |
| Spirax Group PLC                             | Spirax Group PLC                             | CUSIP: 000000000<br>LEI: 213800WFVZQMHOZP2W17 | Long             | EC               | CORP              | GB        |   1171441 | NS      | $103970199.60 | 0.59%             |  |  |  | No            | 1                  | On Loan: No      |
| Cellnex Telecom SA                           | Cellnex Telecom SA                           | CUSIP: 000000000<br>LEI: 5493008T4YG3AQUI7P67 | Long             | EC               | CORP              | ES        |   3532687 | NS      | $106004098.15 | 0.60%             |  |  |  | No            | 1                  | On Loan: No      |
| Beazley PLC                                  | Beazley PLC                                  | CUSIP: 000000000<br>LEI: 213800VTOMUWD41GIT12 | Long             | EC               | CORP              | GB        |  18685588 | NS      | $197254598.27 | 1.12%             |  |  |  | No            | 1                  | On Loan: No      |
| ABN AMRO Bank NV                             | ABN AMRO Bank NV                             | CUSIP: 000000000<br>LEI: BFXS5XCH7N0Y05NIXW11 | Long             | EC               | CORP              | NL        |   8420487 | NS      | $284816236.60 | 1.61%             |  |  |  | No            | 1                  | On Loan: No      |
| EURO CURRENCY                                | EURO CURRENCY                                | CUSIP: 000000000<br>LEI: N/A                  | Short            |  |  | N/A       |   -229590 | NS      | $-266405.05   | -0.00%            |  |  |  | No            | N/A                | On Loan: No      |
| Aon PLC                                      | Aon PLC                                      | CUSIP: 000000000<br>LEI: 635400FALWQYX5E6QC64 | Long             | EC               | CORP              | IE        |    520495 | NS      | $184213590.40 | 1.04%             |  |  |  | No            | 1                  | On Loan: No      |
| Linde PLC                                    | Linde PLC                                    | CUSIP: 000000000<br>LEI: 5299003QR1WT0EF88V51 | Long             | EC               | CORP              | IE        |    693989 | NS      | $284757566.48 | 1.61%             |  |  |  | No            | 1                  | On Loan: No      |
| Willis Towers Watson PLC                     | Willis Towers Watson PLC                     | CUSIP: 000000000<br>LEI: 549300WHC56FF48KL350 | Long             | EC               | CORP              | IE        |    393642 | NS      | $126359082.00 | 0.71%             |  |  |  | No            | 1                  | On Loan: No      |
| JAPANESE YEN                                 | JAPANESE YEN                                 | CUSIP: 000000000<br>LEI: N/A                  | Long             |  |  | JP        | 737953200 | NS      | $4724261.07   | 0.03%             |  |  |  | No            | N/A                | On Loan: No      |
| Spotify Technology SA                        | Spotify Technology SA                        | CUSIP: 000000000<br>LEI: 549300B4X0JHWV0DTD60 | Long             | EC               | CORP              | LU        |    226539 | NS      | $135667410.93 | 0.77%             |  |  |  | No            | 1                  | On Loan: No      |

### Signature

**Date Signed:** 2025-12-30

**Name of Applicant:** MFS SERIES TRUST I

**Signature:** James Byrne

**Name of Signer:** James Byrne

**Title:** Assistant Treasurer