# EDGAR Filing Document

**Accession Number:** 0000798244
**File Stem:** 0001410368-26-007041
**Filing Date:** 2026-1
**Character Count:** 60505
**Document Hash:** 6072821ffa5022c45c5a8a59e517bbca
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-007041.hdr.sgml**: 20260126

**ACCESSION NUMBER**: 0001410368-26-007041

**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:** 26558565

**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 Low Volatility Equity Fund (Series ID: S000042701)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000132013 | A            | MLVAX           |
| C000132014 | B            | MLVBX           |
| C000132015 | C            | MLVGX           |
| C000132016 | I            | MLVHX           |
| C000132017 | R1           | MLVMX           |
| C000132018 | R2           | MLVOX           |
| C000132019 | R3           | MLVPX           |
| C000132020 | R4           | MLVRX           |
| C000132021 | R6           | MLVTX           |

## Nport-Ex

LVU-Q1

![](img56c4e8751.gif)

**Quarterly Report**

November 30, 2025

MFS<sup>®</sup> Low Volatility <br>Equity Fund

![](imge12e202e2.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 – 99.6%  | Common Stocks – 99.6%  | Common Stocks – 99.6%  |
| Aerospace & Defense – 4.5% | Aerospace & Defense – 4.5% |  |
| CACI International, Inc., "A" (a) | 2849 | &nbsp;&nbsp;&nbsp; $1758118 |
| Curtiss-Wright Corp. | 2822 | &nbsp;&nbsp;&nbsp; 1592426 |
| General Dynamics Corp. | 6022 | &nbsp;&nbsp;&nbsp; 2057296 |
| Leidos Holdings, Inc. | 10306 | &nbsp;&nbsp;&nbsp; 1969477 |
| Teledyne Technologies, Inc. (a) | 16402 | &nbsp;&nbsp;&nbsp; 8193127 |
|  |  | &nbsp;&nbsp;&nbsp; $15570444 |
| Biotechnology – 0.6% | Biotechnology – 0.6% |  |
| Biogen, Inc. (a)  | 10801 | &nbsp;&nbsp;&nbsp; $1966754 |
| Broadcasting – 0.8% | Broadcasting – 0.8% |  |
| Omnicom Group, Inc.  | 36970 | &nbsp;&nbsp;&nbsp; $2647791 |
| Brokerage & Asset Managers – 0.8% | Brokerage & Asset Managers – 0.8% |  |
| Cboe Global Markets, Inc.  | 10899 | &nbsp;&nbsp;&nbsp; $2813795 |
| Business Services – 4.2% | Business Services – 4.2% |  |
| Accenture PLC, "A" | 21825 | &nbsp;&nbsp;&nbsp; $5456250 |
| Cognizant Technology Solutions Corp., "A" | 103381 | &nbsp;&nbsp;&nbsp; 8033737 |
| Verisk Analytics, Inc., "A" | 5527 | &nbsp;&nbsp;&nbsp; 1243962 |
|  |  | &nbsp;&nbsp;&nbsp; $14733949 |
| Computer Software – 7.2% | Computer Software – 7.2% |  |
| ACI Worldwide, Inc. (a) | 46933 | &nbsp;&nbsp;&nbsp; $2199280 |
| Autodesk, Inc. (a) | 10935 | &nbsp;&nbsp;&nbsp; 3317023 |
| Intuit, Inc. | 8582 | &nbsp;&nbsp;&nbsp; 5441675 |
| Microsoft Corp. | 17548 | &nbsp;&nbsp;&nbsp; 8633791 |
| Tyler Technologies, Inc. (a) | 11613 | &nbsp;&nbsp;&nbsp; 5453697 |
|  |  | &nbsp;&nbsp;&nbsp; $25045466 |
| Construction – 1.3% | Construction – 1.3% |  |
| Allegion PLC | 8385 | &nbsp;&nbsp;&nbsp; $1392162 |
| AvalonBay Communities, Inc., REIT | 7538 | &nbsp;&nbsp;&nbsp; 1371464 |
| Essex Property Trust, Inc., REIT | 6786 | &nbsp;&nbsp;&nbsp; 1788925 |
|  |  | &nbsp;&nbsp;&nbsp; $4552551 |
| Consumer Products – 3.4% | Consumer Products – 3.4% |  |
| Colgate-Palmolive Co. | 37595 | &nbsp;&nbsp;&nbsp; $3022262 |
| Kimberly-Clark Corp. | 12451 | &nbsp;&nbsp;&nbsp; 1358653 |
| Procter & Gamble Co. | 37940 | &nbsp;&nbsp;&nbsp; 5621190 |
| Reynolds Consumer Products, Inc. | 70222 | &nbsp;&nbsp;&nbsp; 1754146 |
|  |  | &nbsp;&nbsp;&nbsp; $11756251 |
| Consumer Services – 0.3% | Consumer Services – 0.3% |  |
| Grand Canyon Education, Inc. (a)  | 7295 | &nbsp;&nbsp;&nbsp; $1150713 |
| Electrical Equipment – 6.6% | Electrical Equipment – 6.6% |  |
| AMETEK, Inc. | 11682 | &nbsp;&nbsp;&nbsp; $2311751 |
| Amphenol Corp., "A" | 51836 | &nbsp;&nbsp;&nbsp; 7303692 |
| Corning, Inc. | 57385 | &nbsp;&nbsp;&nbsp; 4831817 |
| Eaton Corp. PLC | 6031 | &nbsp;&nbsp;&nbsp; 2086063 |
| TE Connectivity PLC | 28223 | &nbsp;&nbsp;&nbsp; 6382631 |
|  |  | &nbsp;&nbsp;&nbsp; $22915954 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Electronics – 3.5% | Electronics – 3.5% |  |
| Analog Devices, Inc. | 35635 | &nbsp;&nbsp;&nbsp; $9455391 |
| KLA Corp. | 2383 | &nbsp;&nbsp;&nbsp; 2801145 |
|  |  | &nbsp;&nbsp;&nbsp; $12256536 |
| Energy - Independent – 1.4% | Energy - Independent – 1.4% |  |
| EOG Resources, Inc. | 23004 | &nbsp;&nbsp;&nbsp; $2480981 |
| Expand Energy Corp. | 20814 | &nbsp;&nbsp;&nbsp; 2537851 |
|  |  | &nbsp;&nbsp;&nbsp; $5018832 |
| Engineering - Construction – 0.4% | Engineering - Construction – 0.4% |  |
| Jacobs Solutions, Inc.  | 11499 | &nbsp;&nbsp;&nbsp; $1550180 |
| Entertainment – 0.5% | Entertainment – 0.5% |  |
| Live Nation Entertainment, Inc. (a)  | 14012 | &nbsp;&nbsp;&nbsp; $1841877 |
| Food & Beverages – 4.7% | Food & Beverages – 4.7% |  |
| General Mills, Inc. | 132697 | &nbsp;&nbsp;&nbsp; $6283203 |
| Mondelez International, Inc. | 60468 | &nbsp;&nbsp;&nbsp; 3481143 |
| Monster Worldwide, Inc. (a) | 22340 | &nbsp;&nbsp;&nbsp; 1675277 |
| PepsiCo, Inc. | 32180 | &nbsp;&nbsp;&nbsp; 4786453 |
|  |  | &nbsp;&nbsp;&nbsp; $16226076 |
| Food & Drug Stores – 0.4% | Food & Drug Stores – 0.4% |  |
| Albertsons Cos., Inc., "A" | 79684 | &nbsp;&nbsp;&nbsp; $1460608 |
| Gaming & Lodging – 0.8% | Gaming & Lodging – 0.8% |  |
| Hilton Worldwide Holdings, Inc.  | 9141 | &nbsp;&nbsp;&nbsp; $2605459 |
| Health Maintenance Organizations – 0.9% | Health Maintenance Organizations – 0.9% |  |
| Cigna Group  | 11313 | &nbsp;&nbsp;&nbsp; $3136869 |
| Insurance – 7.9% | Insurance – 7.9% |  |
| American International Group, Inc. | 17132 | &nbsp;&nbsp;&nbsp; $1304773 |
| Ameriprise Financial, Inc. | 3432 | &nbsp;&nbsp;&nbsp; 1564100 |
| Assurant, Inc. | 11051 | &nbsp;&nbsp;&nbsp; 2521396 |
| AXIS Capital Holdings Ltd. | 14722 | &nbsp;&nbsp;&nbsp; 1505177 |
| Chubb Ltd. | 14047 | &nbsp;&nbsp;&nbsp; 4160440 |
| Equitable Holdings, Inc. | 35539 | &nbsp;&nbsp;&nbsp; 1659316 |
| Everest Group Ltd. | 14062 | &nbsp;&nbsp;&nbsp; 4419546 |
| Hanover Insurance Group, Inc. | 10973 | &nbsp;&nbsp;&nbsp; 2036040 |
| Hartford Insurance Group, Inc. | 24190 | &nbsp;&nbsp;&nbsp; 3314756 |
| MetLife, Inc. | 22518 | &nbsp;&nbsp;&nbsp; 1723978 |
| Principal Financial Group, Inc. | 22358 | &nbsp;&nbsp;&nbsp; 1896406 |
| Voya Financial, Inc. | 21775 | &nbsp;&nbsp;&nbsp; 1530783 |
|  |  | &nbsp;&nbsp;&nbsp; $27636711 |
| Interactive Media Services – 3.3% | Interactive Media Services – 3.3% |  |
| Alphabet, Inc., "A" | 36239 | &nbsp;&nbsp;&nbsp; $11603003 |
| Leisure & Toys – 0.4% | Leisure & Toys – 0.4% |  |
| Take-Two Interactive Software, Inc. (a)  | 5942 | &nbsp;&nbsp;&nbsp; $1462148 |
| Machinery & Tools – 1.8% | Machinery & Tools – 1.8% |  |
| AGCO Corp. | 13098 | &nbsp;&nbsp;&nbsp; $1387864 |
| Deere & Co. | 4161 | &nbsp;&nbsp;&nbsp; 1932743 |
| Pentair PLC | 13080 | &nbsp;&nbsp;&nbsp; 1376539 |
| Wabtec Corp. | 7827 | &nbsp;&nbsp;&nbsp; 1632321 |
|  |  | &nbsp;&nbsp;&nbsp; $6329467 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Major Banks – 0.5% | Major Banks – 0.5% |  |
| JPMorgan Chase & Co.  | 5711 | &nbsp;&nbsp;&nbsp; $1788000 |
| Medical & Health Technology & Services – 3.6% | Medical & Health Technology & Services – 3.6% |  |
| McKesson Corp. | 11897 | &nbsp;&nbsp;&nbsp; $10482685 |
| Ventas, Inc., REIT | 25738 | &nbsp;&nbsp;&nbsp; 2075255 |
|  |  | &nbsp;&nbsp;&nbsp; $12557940 |
| Medical Equipment – 4.5% | Medical Equipment – 4.5% |  |
| Abbott Laboratories | 29164 | &nbsp;&nbsp;&nbsp; $3759240 |
| Boston Scientific Corp. (a) | 14466 | &nbsp;&nbsp;&nbsp; 1469456 |
| Hologic, Inc. (a) | 29155 | &nbsp;&nbsp;&nbsp; 2185750 |
| Medtronic PLC | 42809 | &nbsp;&nbsp;&nbsp; 4509072 |
| STERIS PLC | 13607 | &nbsp;&nbsp;&nbsp; 3623272 |
|  |  | &nbsp;&nbsp;&nbsp; $15546790 |
| Natural Gas - Distribution – 0.4% | Natural Gas - Distribution – 0.4% |  |
| Atmos Energy Corp.  | 8790 | &nbsp;&nbsp;&nbsp; $1550292 |
| Network & Telecom – 2.0% | Network & Telecom – 2.0% |  |
| Motorola Solutions, Inc.  | 18913 | &nbsp;&nbsp;&nbsp; $6991758 |
| Other Banks & Diversified Financials – 3.3% | Other Banks & Diversified Financials – 3.3% |  |
| Mastercard, Inc., "A" | 4915 | &nbsp;&nbsp;&nbsp; $2705855 |
| Popular, Inc. | 11221 | &nbsp;&nbsp;&nbsp; 1287161 |
| Visa, Inc., "A" | 21859 | &nbsp;&nbsp;&nbsp; 7310524 |
|  |  | &nbsp;&nbsp;&nbsp; $11303540 |
| Pharmaceuticals – 7.7% | Pharmaceuticals – 7.7% |  |
| AbbVie, Inc. | 9055 | &nbsp;&nbsp;&nbsp; $2061824 |
| Johnson & Johnson | 62229 | &nbsp;&nbsp;&nbsp; 12876425 |
| Merck & Co., Inc. | 66357 | &nbsp;&nbsp;&nbsp; 6956204 |
| Pfizer, Inc. | 116914 | &nbsp;&nbsp;&nbsp; 3009366 |
| Vertex Pharmaceuticals, Inc. (a) | 4406 | &nbsp;&nbsp;&nbsp; 1910486 |
|  |  | &nbsp;&nbsp;&nbsp; $26814305 |
| Pollution Control – 3.4% | Pollution Control – 3.4% |  |
| Republic Services, Inc. | 26104 | &nbsp;&nbsp;&nbsp; $5666134 |
| Waste Connections, Inc. | 22036 | &nbsp;&nbsp;&nbsp; 3890456 |
| Waste Management, Inc. | 10117 | &nbsp;&nbsp;&nbsp; 2204191 |
|  |  | &nbsp;&nbsp;&nbsp; $11760781 |
| Railroad & Shipping – 0.5% | Railroad & Shipping – 0.5% |  |
| CSX Corp.  | 47342 | &nbsp;&nbsp;&nbsp; $1674013 |
| Real Estate – 2.4% | Real Estate – 2.4% |  |
| Essential Properties Realty Trust, REIT | 45609 | &nbsp;&nbsp;&nbsp; $1443981 |
| Federal Realty Investment Trust, REIT | 18329 | &nbsp;&nbsp;&nbsp; 1809622 |
| New Residential Investment Corp., REIT | 140958 | &nbsp;&nbsp;&nbsp; 1619608 |
| NNN REIT, Inc. | 36558 | &nbsp;&nbsp;&nbsp; 1511673 |
| W.P. Carey, Inc., REIT | 27186 | &nbsp;&nbsp;&nbsp; 1831521 |
|  |  | &nbsp;&nbsp;&nbsp; $8216405 |
| Real Estate - Storage – 0.4% | Real Estate - Storage – 0.4% |  |
| Public Storage, Inc., REIT  | 5615 | &nbsp;&nbsp;&nbsp; $1541542 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Restaurants – 1.6% | Restaurants – 1.6% |  |
| Aramark | 36428 | &nbsp;&nbsp;&nbsp; $1354029 |
| McDonald's Corp. | 13451 | &nbsp;&nbsp;&nbsp; 4194291 |
|  |  | &nbsp;&nbsp;&nbsp; $5548320 |
| Specialty Chemicals – 0.9% | Specialty Chemicals – 0.9% |  |
| Ecolab, Inc. | 6273 | &nbsp;&nbsp;&nbsp; $1726078 |
| RPM International, Inc. | 12931 | &nbsp;&nbsp;&nbsp; 1386850 |
|  |  | &nbsp;&nbsp;&nbsp; $3112928 |
| Specialty Stores – 4.3% | Specialty Stores – 4.3% |  |
| AutoZone, Inc. (a) | 1591 | &nbsp;&nbsp;&nbsp; $6291339 |
| Home Depot, Inc. | 5342 | &nbsp;&nbsp;&nbsp; 1906667 |
| O'Reilly Automotive, Inc. (a) | 34295 | &nbsp;&nbsp;&nbsp; 3487801 |
| Walmart Stores, Inc. | 29812 | &nbsp;&nbsp;&nbsp; 3294524 |
|  |  | &nbsp;&nbsp;&nbsp; $14980331 |
| Telecom - Infrastructure – 0.5% | Telecom - Infrastructure – 0.5% |  |
| American Tower Corp., REIT  | 10450 | &nbsp;&nbsp;&nbsp; $1894271 |
| Telecom Services – 0.6% | Telecom Services – 0.6% |  |
| Comcast Corp., "A" | 71253 | &nbsp;&nbsp;&nbsp; $1901743 |
| Trucking – 0.6% | Trucking – 0.6% |  |
| J.B. Hunt Transport Services, Inc.  | 12212 | &nbsp;&nbsp;&nbsp; $2124400 |
| Utilities - Electric Power – 6.7% | Utilities - Electric Power – 6.7% |  |
| Dominion Energy, Inc. | 27648 | &nbsp;&nbsp;&nbsp; $1735465 |
| DTE Energy Co. | 18479 | &nbsp;&nbsp;&nbsp; 2532177 |
| Duke Energy Corp. | 34368 | &nbsp;&nbsp;&nbsp; 4259570 |
| Entergy Corp. | 16389 | &nbsp;&nbsp;&nbsp; 1598255 |
| Evergy, Inc. | 64128 | &nbsp;&nbsp;&nbsp; 4979539 |
| Exelon Corp. | 85412 | &nbsp;&nbsp;&nbsp; 4024614 |
| Xcel Energy, Inc. | 50065 | &nbsp;&nbsp;&nbsp; 4110837 |
|  |  | &nbsp;&nbsp;&nbsp; $23240457 |
| **Total Common Stocks**  |  | &nbsp;&nbsp; **$346829250** |
| Mutual Funds (h) – 0.3%  | Mutual Funds (h) – 0.3%  | Mutual Funds (h) – 0.3%  |
| Money Market Funds – 0.3% | Money Market Funds – 0.3% |  |
| MFS Institutional Money Market Portfolio, 4.01% (v)  | 1123189 | &nbsp;&nbsp;&nbsp; $1123413 |
| Other Assets, Less Liabilities – 0.1% |  | &nbsp;&nbsp;&nbsp; 176405 |
| **Net Assets – 100.0%** | **Net Assets – 100.0%** | &nbsp;&nbsp; **$348129068** |

---

&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 $1,123,413 and $346,829,250, respectively.

&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: <br> REIT Real Estate Investment Trust

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.

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 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; $346829250 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $346829250 |
| Investment Companies | &nbsp;&nbsp;&nbsp; 1123413 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 1123413 |
| Total | &nbsp;&nbsp;&nbsp; $347952663 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $347952663 |

---

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

------

*Supplemental Information (unaudited) – continued*

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

**(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  | &nbsp;&nbsp; $1666651 | &nbsp;&nbsp; $12059926 | &nbsp;&nbsp; $12603123 | &nbsp;&nbsp; $(153)<br>| &nbsp;&nbsp; $112 | &nbsp;&nbsp; $1123413<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; $11813 | &nbsp;&nbsp; $— |

---

------

## 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 Low Volatility Equity Fund

- **b. EDGAR series identifier (if any):** S000042701

- **c. LEI of Series:** 549300X3ZVIZOWLC2P38

**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:** $348424851.89

**Total Liabilities:** $68580.64

**Net Assets:** $348356271.25

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000132013 | 1.81%                | -1.68%               | 2.82%                |
| Class ID C000132014 | 1.76%                | -1.74%               | 2.77%                |
| Class ID C000132015 | 1.74%                | -1.70%               | 2.74%                |
| Class ID C000132016 | 1.82%                | -1.63%               | 2.86%                |
| Class ID C000132017 | 1.75%                | -1.74%               | 2.78%                |
| Class ID C000132018 | 1.79%                | -1.67%               | 2.80%                |
| Class ID C000132019 | 1.80%                | -1.67%               | 2.81%                |
| Class ID C000132020 | 1.82%                | -1.63%               | 2.86%                |
| Class ID C000132021 | 1.84%                | -1.63%               | 2.81%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $1990105.47              | $3825936.14                                |
| Month 2  | $5934408.40              | $-11878103.26                              |
| Month 3  | $4048947.54              | $5250238.77                                |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| AGCO Corp                                | AGCO Corp                                | CUSIP: 001084102<br>LEI: LYOM0B2GCF1JWXK5ZG04 | Long             | EC               | CORP              | US        |     13098 | NS      | $1387864.08   | 0.40%             |  |  |  | No            |                  1 | On Loan: No      |
| Abbott Laboratories                      | Abbott Laboratories                      | CUSIP: 002824100<br>LEI: HQD377W2YR662HK5JX27 | Long             | EC               | CORP              | US        |     29164 | NS      | $3759239.60   | 1.08%             |  |  |  | No            |                  1 | On Loan: No      |
| AbbVie Inc                               | AbbVie Inc                               | CUSIP: 00287Y109<br>LEI: FR5LCKFTG8054YNNRU85 | Long             | EC               | CORP              | US        |      9055 | NS      | $2061823.50   | 0.59%             |  |  |  | No            |                  1 | On Loan: No      |
| ACI Worldwide Inc                        | ACI Worldwide Inc                        | CUSIP: 004498101<br>LEI: 5493003BPVMZUJ6F5C02 | Long             | EC               | CORP              | US        |     46933 | NS      | $2199280.38   | 0.63%             |  |  |  | No            |                  1 | On Loan: No      |
| Albertsons Cos Inc                       | Albertsons Cos Inc                       | CUSIP: 013091103<br>LEI: 549300YKWOC0AOR16R51 | Long             | EC               | CORP              | US        |     79684 | NS      | $1460607.72   | 0.42%             |  |  |  | No            |                  1 | On Loan: No      |
| Alphabet Inc                             | Alphabet Inc                             | CUSIP: 02079K305<br>LEI: 5493006MHB84DD0ZWV18 | Long             | EC               | CORP              | US        |     36239 | NS      | $11603003.02  | 3.33%             |  |  |  | No            |                  1 | On Loan: No      |
| American International Group Inc         | American International Group Inc         | CUSIP: 026874784<br>LEI: ODVCVCQG2BP6VHV36M30 | Long             | EC               | CORP              | US        |     17132 | NS      | $1304773.12   | 0.37%             |  |  |  | No            |                  1 | On Loan: No      |
| American Tower Corp                      | American Tower Corp                      | CUSIP: 03027X100<br>LEI: 5493006ORUSIL88JOE18 | Long             | EC               | CORP              | US        |     10450 | NS      | $1894271.50   | 0.54%             |  |  |  | No            |                  1 | On Loan: No      |
| Ameriprise Financial Inc                 | Ameriprise Financial Inc                 | CUSIP: 03076C106<br>LEI: 6ZLKQF7QB6JAEKQS5388 | Long             | EC               | CORP              | US        |      3432 | NS      | $1564099.68   | 0.45%             |  |  |  | No            |                  1 | On Loan: No      |
| AMETEK Inc                               | AMETEK Inc                               | CUSIP: 031100100<br>LEI: 549300WZDEF9KKE40E98 | Long             | EC               | CORP              | US        |     11682 | NS      | $2311750.98   | 0.66%             |  |  |  | No            |                  1 | On Loan: No      |
| Amphenol Corp                            | Amphenol Corp                            | CUSIP: 032095101<br>LEI: 549300D3L3G0R4U4VT04 | Long             | EC               | CORP              | US        |     51836 | NS      | $7303692.40   | 2.10%             |  |  |  | No            |                  1 | On Loan: No      |
| Analog Devices Inc                       | Analog Devices Inc                       | CUSIP: 032654105<br>LEI: GYVOE5EZ4GDAVTU4CQ61 | Long             | EC               | CORP              | US        |     35635 | NS      | $9455390.90   | 2.71%             |  |  |  | No            |                  1 | On Loan: No      |
| Aramark                                  | Aramark                                  | CUSIP: 03852U106<br>LEI: 549300MR6PG2DWZUIL39 | Long             | EC               | CORP              | US        |     36428 | NS      | $1354028.76   | 0.39%             |  |  |  | No            |                  1 | On Loan: No      |
| Assurant Inc                             | Assurant Inc                             | CUSIP: 04621X108<br>LEI: H3F39CAXWQRVWURFXL38 | Long             | EC               | CORP              | US        |     11051 | NS      | $2521396.16   | 0.72%             |  |  |  | No            |                  1 | On Loan: No      |
| Atmos Energy Corp                        | Atmos Energy Corp                        | CUSIP: 049560105<br>LEI: QVLWEGTD2S8GJMO8D383 | Long             | EC               | CORP              | US        |      8790 | NS      | $1550292.30   | 0.45%             |  |  |  | No            |                  1 | On Loan: No      |
| Autodesk Inc                             | Autodesk Inc                             | CUSIP: 052769106<br>LEI: FRKKVKAIQEF3FCSTPG55 | Long             | EC               | CORP              | US        |     10935 | NS      | $3317022.90   | 0.95%             |  |  |  | No            |                  1 | On Loan: No      |
| AutoZone Inc                             | AutoZone Inc                             | CUSIP: 053332102<br>LEI: GA3JGKJ41LJKXDN23E90 | Long             | EC               | CORP              | US        |      1591 | NS      | $6291339.03   | 1.81%             |  |  |  | No            |                  1 | On Loan: No      |
| AvalonBay Communities Inc                | AvalonBay Communities Inc                | CUSIP: 053484101<br>LEI: K9G90K85RBWD2LAGQX17 | Long             | EC               | CORP              | US        |      7538 | NS      | $1371463.72   | 0.39%             |  |  |  | No            |                  1 | On Loan: No      |
| Biogen Inc                               | Biogen Inc                               | CUSIP: 09062X103<br>LEI: W8J5WZB5IY3K0NDQT671 | Long             | EC               | CORP              | US        |     10801 | NS      | $1966754.09   | 0.56%             |  |  |  | No            |                  1 | On Loan: No      |
| Boston Scientific Corp                   | Boston Scientific Corp                   | CUSIP: 101137107<br>LEI: Y6ZDD9FP4P8JSSJMW954 | Long             | EC               | CORP              | US        |     14466 | NS      | $1469456.28   | 0.42%             |  |  |  | No            |                  1 | On Loan: No      |
| Cboe Global Markets Inc                  | Cboe Global Markets Inc                  | CUSIP: 12503M108<br>LEI: 529900RLNSGA90UPEH54 | Long             | EC               | CORP              | US        |     10899 | NS      | $2813794.83   | 0.81%             |  |  |  | No            |                  1 | On Loan: No      |
| Cigna Group/The                          | Cigna Group/The                          | CUSIP: 125523100<br>LEI: 549300VIWYMSIGT1U456 | Long             | EC               | CORP              | US        |     11313 | NS      | $3136868.64   | 0.90%             |  |  |  | No            |                  1 | On Loan: No      |
| CSX Corp                                 | CSX Corp                                 | CUSIP: 126408103<br>LEI: 549300JVQR4N1MMP3Q88 | Long             | EC               | CORP              | US        |     47342 | NS      | $1674013.12   | 0.48%             |  |  |  | No            |                  1 | On Loan: No      |
| CACI International Inc                   | CACI International Inc                   | CUSIP: 127190304<br>LEI: SYRPI2D1O9WRTS2WX210 | Long             | EC               | CORP              | US        |      2849 | NS      | $1758117.90   | 0.50%             |  |  |  | No            |                  1 | On Loan: No      |
| Expand Energy Corp                       | Expand Energy Corp                       | CUSIP: 165167735<br>LEI: X2MT1W32SPAZ9WSKLE78 | Long             | EC               | CORP              | US        |     20814 | NS      | $2537851.02   | 0.73%             |  |  |  | No            |                  1 | On Loan: No      |
| Cognizant Technology Solutions Corp      | Cognizant Technology Solutions Corp      | CUSIP: 192446102<br>LEI: 5493006IEVQEFQO40L83 | Long             | EC               | CORP              | US        |    103381 | NS      | $8033737.51   | 2.31%             |  |  |  | No            |                  1 | On Loan: No      |
| Colgate-Palmolive Co                     | Colgate-Palmolive Co                     | CUSIP: 194162103<br>LEI: YMEGZFW4SBUSS5BQXF88 | Long             | EC               | CORP              | US        |     37595 | NS      | $3022262.05   | 0.87%             |  |  |  | No            |                  1 | On Loan: No      |
| Comcast Corp                             | Comcast Corp                             | CUSIP: 20030N101<br>LEI: 51M0QTTNCGUN7KFCFZ59 | Long             | EC               | CORP              | US        |     71253 | NS      | $1901742.57   | 0.55%             |  |  |  | No            |                  1 | On Loan: No      |
| Corning Inc                              | Corning Inc                              | CUSIP: 219350105<br>LEI: 549300X2937PB0CJ7I56 | Long             | EC               | CORP              | US        |     57385 | NS      | $4831817.00   | 1.39%             |  |  |  | No            |                  1 | On Loan: No      |
| Curtiss-Wright Corp                      | Curtiss-Wright Corp                      | CUSIP: 231561101<br>LEI: TEL51ETZWP7D0ZM4X325 | Long             | EC               | CORP              | US        |      2822 | NS      | $1592426.38   | 0.46%             |  |  |  | No            |                  1 | On Loan: No      |
| DTE Energy Co                            | DTE Energy Co                            | CUSIP: 233331107<br>LEI: 549300IX8SD6XXD71I78 | Long             | EC               | CORP              | US        |     18479 | NS      | $2532177.37   | 0.73%             |  |  |  | No            |                  1 | On Loan: No      |
| Deere & Co                               | Deere & Co                               | CUSIP: 244199105<br>LEI: PWFTNG3EI0Y73OXWDH08 | Long             | EC               | CORP              | US        |      4161 | NS      | $1932742.89   | 0.55%             |  |  |  | No            |                  1 | On Loan: No      |
| Dominion Energy Inc                      | Dominion Energy Inc                      | CUSIP: 25746U109<br>LEI: ILUL7B6Z54MRYCF6H308 | Long             | EC               | CORP              | US        |     27648 | NS      | $1735464.96   | 0.50%             |  |  |  | No            |                  1 | On Loan: No      |
| Duke Energy Corp                         | Duke Energy Corp                         | CUSIP: 26441C204<br>LEI: I1BZKREC126H0VB1BL91 | Long             | EC               | CORP              | US        |     34368 | NS      | $4259569.92   | 1.22%             |  |  |  | No            |                  1 | On Loan: No      |
| EOG Resources Inc                        | EOG Resources Inc                        | CUSIP: 26875P101<br>LEI: XWTZDRYZPBUHIQBKDB46 | Long             | EC               | CORP              | US        |     23004 | NS      | $2480981.40   | 0.71%             |  |  |  | No            |                  1 | On Loan: No      |
| Ecolab Inc                               | Ecolab Inc                               | CUSIP: 278865100<br>LEI: 82DYEISM090VG8LTLS26 | Long             | EC               | CORP              | US        |      6273 | NS      | $1726078.68   | 0.50%             |  |  |  | No            |                  1 | On Loan: No      |
| Entergy Corp                             | Entergy Corp                             | CUSIP: 29364G103<br>LEI: 4XM3TW50JULSLG8BNC79 | Long             | EC               | CORP              | US        |     16389 | NS      | $1598255.28   | 0.46%             |  |  |  | No            |                  1 | On Loan: No      |
| Equitable Holdings Inc                   | Equitable Holdings Inc                   | CUSIP: 29452E101<br>LEI: 549300FIBAKMNHPZ4009 | Long             | EC               | CORP              | US        |     35539 | NS      | $1659315.91   | 0.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Essential Properties Realty Trust Inc    | Essential Properties Realty Trust Inc    | CUSIP: 29670E107<br>LEI: 2549009LXQLVYCGLZO50 | Long             | EC               | CORP              | US        |     45609 | NS      | $1443980.94   | 0.41%             |  |  |  | No            |                  1 | On Loan: No      |
| Essex Property Trust Inc                 | Essex Property Trust Inc                 | CUSIP: 297178105<br>LEI: 549300TR2H2VEFX0NC60 | Long             | EC               | CORP              | US        |      6786 | NS      | $1788925.32   | 0.51%             |  |  |  | No            |                  1 | On Loan: No      |
| Evergy Inc                               | Evergy Inc                               | CUSIP: 30034W106<br>LEI: 549300PGTHDQY6PSUI61 | Long             | EC               | CORP              | US        |     64128 | NS      | $4979539.20   | 1.43%             |  |  |  | No            |                  1 | On Loan: No      |
| Exelon Corp                              | Exelon Corp                              | CUSIP: 30161N101<br>LEI: 3SOUA6IRML7435B56G12 | Long             | EC               | CORP              | US        |     85412 | NS      | $4024613.44   | 1.16%             |  |  |  | No            |                  1 | On Loan: No      |
| Federal Realty Investment Trust          | Federal Realty Investment Trust          | CUSIP: 313745101<br>LEI: 549300FHEI1SLVZ0RB48 | Long             | EC               | CORP              | US        |     18329 | NS      | $1809622.17   | 0.52%             |  |  |  | No            |                  1 | On Loan: No      |
| General Dynamics Corp                    | General Dynamics Corp                    | CUSIP: 369550108<br>LEI: 9C1X8XOOTYY2FNYTVH06 | Long             | EC               | CORP              | US        |      6022 | NS      | $2057295.86   | 0.59%             |  |  |  | No            |                  1 | On Loan: No      |
| General Mills Inc                        | General Mills Inc                        | CUSIP: 370334104<br>LEI: 2TGYMUGI08PO8X8L6150 | Long             | EC               | CORP              | US        |    132697 | NS      | $6283202.95   | 1.80%             |  |  |  | No            |                  1 | On Loan: No      |
| Grand Canyon Education Inc               | Grand Canyon Education Inc               | CUSIP: 38526M106<br>LEI: 529900XFER799IYOSW74 | Long             | EC               | CORP              | US        |      7295 | NS      | $1150713.30   | 0.33%             |  |  |  | No            |                  1 | On Loan: No      |
| Hanover Insurance Group Inc/The          | Hanover Insurance Group Inc/The          | CUSIP: 410867105<br>LEI: JJYR6MFKFF6CF8DBZ078 | Long             | EC               | CORP              | US        |     10973 | NS      | $2036040.15   | 0.58%             |  |  |  | No            |                  1 | On Loan: No      |
| Hartford Insurance Group Inc/The         | Hartford Insurance Group Inc/The         | CUSIP: 416515104<br>LEI: IU7C3FTM7Y3BQM112U94 | Long             | EC               | CORP              | US        |     24190 | NS      | $3314755.70   | 0.95%             |  |  |  | No            |                  1 | On Loan: No      |
| Hilton Worldwide Holdings Inc            | Hilton Worldwide Holdings Inc            | CUSIP: 43300A203<br>LEI: 549300HVGPK36ICB0B89 | Long             | EC               | CORP              | US        |      9141 | NS      | $2605459.23   | 0.75%             |  |  |  | No            |                  1 | On Loan: No      |
| Hologic Inc                              | Hologic Inc                              | CUSIP: 436440101<br>LEI: 549300DYP6F5ZJL0LB74 | Long             | EC               | CORP              | US        |     29155 | NS      | $2185750.35   | 0.63%             |  |  |  | No            |                  1 | On Loan: No      |
| Home Depot Inc/The                       | Home Depot Inc/The                       | CUSIP: 437076102<br>LEI: QEKMOTMBBKA8I816DO57 | Long             | EC               | CORP              | US        |      5342 | NS      | $1906666.64   | 0.55%             |  |  |  | No            |                  1 | On Loan: No      |
| JB Hunt Transport Services Inc           | JB Hunt Transport Services Inc           | CUSIP: 445658107<br>LEI: 549300XCD1MPI1C5GK90 | Long             | EC               | CORP              | US        |     12212 | NS      | $2124399.52   | 0.61%             |  |  |  | No            |                  1 | On Loan: No      |
| Intuit Inc                               | Intuit Inc                               | CUSIP: 461202103<br>LEI: VI90HBPH7XSFMB9E4M29 | Long             | EC               | CORP              | US        |      8582 | NS      | $5441674.56   | 1.56%             |  |  |  | No            |                  1 | On Loan: No      |
| JPMorgan Chase & Co                      | JPMorgan Chase & Co                      | CUSIP: 46625H100<br>LEI: 8I5DZWZKVSZI1NUHU748 | Long             | EC               | CORP              | US        |      5711 | NS      | $1787999.88   | 0.51%             |  |  |  | No            |                  1 | On Loan: No      |
| Jacobs Solutions Inc                     | Jacobs Solutions Inc                     | CUSIP: 46982L108<br>LEI: 254900E3KHXCC2C8K272 | Long             | EC               | CORP              | US        |     11499 | NS      | $1550180.19   | 0.44%             |  |  |  | No            |                  1 | On Loan: No      |
| Johnson & Johnson                        | Johnson & Johnson                        | CUSIP: 478160104<br>LEI: 549300G0CFPGEF6X2043 | Long             | EC               | CORP              | US        |     62229 | NS      | $12876424.68  | 3.70%             |  |  |  | No            |                  1 | On Loan: No      |
| KLA Corp                                 | KLA Corp                                 | CUSIP: 482480100<br>LEI: 549300H0BF5JCG96TJ81 | Long             | EC               | CORP              | US        |      2383 | NS      | $2801145.01   | 0.80%             |  |  |  | No            |                  1 | On Loan: No      |
| Kimberly-Clark Corp                      | Kimberly-Clark Corp                      | CUSIP: 494368103<br>LEI: MP3J6QPYPGN75NVW2S34 | Long             | EC               | CORP              | US        |     12451 | NS      | $1358653.12   | 0.39%             |  |  |  | No            |                  1 | On Loan: No      |
| Leidos Holdings Inc                      | Leidos Holdings Inc                      | CUSIP: 525327102<br>LEI: 549300IUTGTP6EJP8124 | Long             | EC               | CORP              | US        |     10306 | NS      | $1969476.60   | 0.57%             |  |  |  | No            |                  1 | On Loan: No      |
| Live Nation Entertainment Inc            | Live Nation Entertainment Inc            | CUSIP: 538034109<br>LEI: 5493007B9BM9ZXJINO78 | Long             | EC               | CORP              | US        |     14012 | NS      | $1841877.40   | 0.53%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Institutional Money Market Portfolio | MFS Institutional Money Market Portfolio | CUSIP: 55291X109<br>LEI: 5L2W638H85N8T1136O07 | Long             | EC               | RF                | US        |   1119544 | NS      | $1119768.36   | 0.32%             |  |  |  | No            |                  1 | On Loan: No      |
| Mastercard Inc                           | Mastercard Inc                           | CUSIP: 57636Q104<br>LEI: AR5L2ODV9HN37376R084 | Long             | EC               | CORP              | US        |      4915 | NS      | $2705854.95   | 0.78%             |  |  |  | No            |                  1 | On Loan: No      |
| McDonald's Corp                          | McDonald's Corp                          | CUSIP: 580135101<br>LEI: UE2136O97NLB5BYP9H04 | Long             | EC               | CORP              | US        |     13451 | NS      | $4194290.82   | 1.20%             |  |  |  | No            |                  1 | On Loan: No      |
| McKesson Corp                            | McKesson Corp                            | CUSIP: 58155Q103<br>LEI: 549300WZWOM80UCFSF54 | Long             | EC               | CORP              | US        |     11897 | NS      | $10482684.64  | 3.01%             |  |  |  | No            |                  1 | On Loan: No      |
| Merck & Co Inc                           | Merck & Co Inc                           | CUSIP: 58933Y105<br>LEI: 4YV9Y5M8S0BRK1RP0397 | Long             | EC               | CORP              | US        |     66357 | NS      | $6956204.31   | 2.00%             |  |  |  | No            |                  1 | On Loan: No      |
| MetLife Inc                              | MetLife Inc                              | CUSIP: 59156R108<br>LEI: C4BXATY60WC6XEOZDX54 | Long             | EC               | CORP              | US        |     22518 | NS      | $1723978.08   | 0.49%             |  |  |  | No            |                  1 | On Loan: No      |
| Microsoft Corp                           | Microsoft Corp                           | CUSIP: 594918104<br>LEI: INR2EJN1ERAN0W5ZP974 | Long             | EC               | CORP              | US        |     17548 | NS      | $8633791.48   | 2.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Mondelez International Inc               | Mondelez International Inc               | CUSIP: 609207105<br>LEI: 549300DV9GIB88LZ5P30 | Long             | EC               | CORP              | US        |     60468 | NS      | $3481142.76   | 1.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Monster Beverage Corp                    | Monster Beverage Corp                    | CUSIP: 61174X109<br>LEI: 52990090AP0E7HCB6F33 | Long             | EC               | CORP              | US        |     22340 | NS      | $1675276.60   | 0.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Motorola Solutions Inc                   | Motorola Solutions Inc                   | CUSIP: 620076307<br>LEI: 6S552MUG6KGJVEBSEC55 | Long             | EC               | CORP              | US        |     18913 | NS      | $6991757.84   | 2.01%             |  |  |  | No            |                  1 | On Loan: No      |
| NNN REIT Inc                             | NNN REIT Inc                             | CUSIP: 637417106<br>LEI: 5493008JKH5SOTI0JS97 | Long             | EC               | CORP              | US        |     36558 | NS      | $1511673.30   | 0.43%             |  |  |  | No            |                  1 | On Loan: No      |
| Rithm Capital Corp                       | Rithm Capital Corp                       | CUSIP: 64828T201<br>LEI: 549300WNTHGEO5LP2G31 | Long             | EC               | CORP              | US        |    140958 | NS      | $1619607.42   | 0.46%             |  |  |  | No            |                  1 | On Loan: No      |
| O'Reilly Automotive Inc                  | O'Reilly Automotive Inc                  | CUSIP: 67103H107<br>LEI: 549300K2RLMQL149Q332 | Long             | EC               | CORP              | US        |     34295 | NS      | $3487801.50   | 1.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Omnicom Group Inc                        | Omnicom Group Inc                        | CUSIP: 681919106<br>LEI: HKUPACFHSSASQK8HLS17 | Long             | EC               | CORP              | US        |     36970 | NS      | $2647791.40   | 0.76%             |  |  |  | No            |                  1 | On Loan: No      |
| PepsiCo Inc                              | PepsiCo Inc                              | CUSIP: 713448108<br>LEI: FJSUNZKFNQ5YPJ5OT455 | Long             | EC               | CORP              | US        |     32180 | NS      | $4786453.20   | 1.37%             |  |  |  | No            |                  1 | On Loan: No      |
| Pfizer Inc                               | Pfizer Inc                               | CUSIP: 717081103<br>LEI: 765LHXWGK1KXCLTFYQ30 | Long             | EC               | CORP              | US        |    116914 | NS      | $3009366.36   | 0.86%             |  |  |  | No            |                  1 | On Loan: No      |
| Popular Inc                              | Popular Inc                              | CUSIP: 733174700<br>LEI: 5493008CARDZMVQ3LO89 | Long             | EC               | CORP              | PR        |     11221 | NS      | $1287160.91   | 0.37%             |  |  |  | No            |                  1 | On Loan: No      |
| Principal Financial Group Inc            | Principal Financial Group Inc            | CUSIP: 74251V102<br>LEI: CUMYEZJOAF02RYZ1JJ85 | Long             | EC               | CORP              | US        |     22358 | NS      | $1896405.56   | 0.54%             |  |  |  | No            |                  1 | On Loan: No      |
| Procter & Gamble Co/The                  | Procter & Gamble Co/The                  | CUSIP: 742718109<br>LEI: 2572IBTT8CCZW6AU4141 | Long             | EC               | CORP              | US        |     37940 | NS      | $5621190.40   | 1.61%             |  |  |  | No            |                  1 | On Loan: No      |
| Public Storage                           | Public Storage                           | CUSIP: 74460D109<br>LEI: 254900GLQZAD4N7N5Q19 | Long             | EC               | CORP              | US        |      5615 | NS      | $1541542.10   | 0.44%             |  |  |  | No            |                  1 | On Loan: No      |
| RPM International Inc                    | RPM International Inc                    | CUSIP: 749685103<br>LEI: 549300TJCKW4BRXPJ474 | Long             | EC               | CORP              | US        |     12931 | NS      | $1386849.75   | 0.40%             |  |  |  | No            |                  1 | On Loan: No      |
| Republic Services Inc                    | Republic Services Inc                    | CUSIP: 760759100<br>LEI: NKNQHM6BLECKVOQP7O46 | Long             | EC               | CORP              | US        |     26104 | NS      | $5666134.24   | 1.63%             |  |  |  | No            |                  1 | On Loan: No      |
| Reynolds Consumer Products Inc           | Reynolds Consumer Products Inc           | CUSIP: 76171L106<br>LEI: 894500ZQLNYY77S80A06 | Long             | EC               | CORP              | US        |     70222 | NS      | $1754145.56   | 0.50%             |  |  |  | No            |                  1 | On Loan: No      |
| Take-Two Interactive Software Inc        | Take-Two Interactive Software Inc        | CUSIP: 874054109<br>LEI: BOMSTHHJK882EWYX3334 | Long             | EC               | CORP              | US        |      5942 | NS      | $1462147.94   | 0.42%             |  |  |  | No            |                  1 | On Loan: No      |
| Teledyne Technologies Inc                | Teledyne Technologies Inc                | CUSIP: 879360105<br>LEI: 549300VSMO9KYQWDND94 | Long             | EC               | CORP              | US        |     16402 | NS      | $8193127.04   | 2.35%             |  |  |  | No            |                  1 | On Loan: No      |
| Tyler Technologies Inc                   | Tyler Technologies Inc                   | CUSIP: 902252105<br>LEI: 25490040SMU4Z8LBCW70 | Long             | EC               | CORP              | US        |     11613 | NS      | $5453697.06   | 1.57%             |  |  |  | No            |                  1 | On Loan: No      |
| Ventas Inc                               | Ventas Inc                               | CUSIP: 92276F100<br>LEI: ORQTRC074CWLT3DKHT41 | Long             | EC               | CORP              | US        |     25738 | NS      | $2075254.94   | 0.60%             |  |  |  | No            |                  1 | On Loan: No      |
| Verisk Analytics Inc                     | Verisk Analytics Inc                     | CUSIP: 92345Y106<br>LEI: 549300I1YSWNIRKBWP67 | Long             | EC               | CORP              | US        |      5527 | NS      | $1243961.89   | 0.36%             |  |  |  | No            |                  1 | On Loan: No      |
| Vertex Pharmaceuticals Inc               | Vertex Pharmaceuticals Inc               | CUSIP: 92532F100<br>LEI: 54930015RAQRRZ5ZGJ91 | Long             | EC               | CORP              | US        |      4406 | NS      | $1910485.66   | 0.55%             |  |  |  | No            |                  1 | On Loan: No      |
| Visa Inc                                 | Visa Inc                                 | CUSIP: 92826C839<br>LEI: 549300JZ4OKEHW3DPJ59 | Long             | EC               | CORP              | US        |     21859 | NS      | $7310523.96   | 2.10%             |  |  |  | No            |                  1 | On Loan: No      |
| Voya Financial Inc                       | Voya Financial Inc                       | CUSIP: 929089100<br>LEI: 549300T065Z4KJ686G75 | Long             | EC               | CORP              | US        |     21775 | NS      | $1530782.50   | 0.44%             |  |  |  | No            |                  1 | On Loan: No      |
| WP Carey Inc                             | WP Carey Inc                             | CUSIP: 92936U109<br>LEI: 54930042CRNE713E3Q67 | Long             | EC               | CORP              | US        |     27186 | NS      | $1831520.82   | 0.53%             |  |  |  | No            |                  1 | On Loan: No      |
| Westinghouse Air Brake Technologies Corp | Westinghouse Air Brake Technologies Corp | CUSIP: 929740108<br>LEI: 06BTX5UWZD0GQ5N5Y745 | Long             | EC               | CORP              | US        |      7827 | NS      | $1632320.85   | 0.47%             |  |  |  | No            |                  1 | On Loan: No      |
| Walmart Inc                              | Walmart Inc                              | CUSIP: 931142103<br>LEI: Y87794H0US1R65VBXU25 | Long             | EC               | CORP              | US        |     29812 | NS      | $3294524.12   | 0.95%             |  |  |  | No            |                  1 | On Loan: No      |
| Waste Connections Inc                    | Waste Connections Inc                    | CUSIP: 94106B101<br>LEI: 549300HDLRTPBQU69P29 | Long             | EC               | CORP              | CA        |     22036 | NS      | $3890455.80   | 1.12%             |  |  |  | No            |                  1 | On Loan: No      |
| Waste Management Inc                     | Waste Management Inc                     | CUSIP: 94106L109<br>LEI: 549300YX8JIID70NFS41 | Long             | EC               | CORP              | US        |     10117 | NS      | $2204190.79   | 0.63%             |  |  |  | No            |                  1 | On Loan: No      |
| Xcel Energy Inc                          | Xcel Energy Inc                          | CUSIP: 98389B100<br>LEI: LGJNMI9GH8XIDG5RCM61 | Long             | EC               | CORP              | US        |     50065 | NS      | $4110837.15   | 1.18%             |  |  |  | No            |                  1 | On Loan: No      |
| Allegion plc                             | Allegion plc                             | CUSIP: 000000000<br>LEI: 984500560CAC2E6FB757 | Long             | EC               | CORP              | IE        |      8385 | NS      | $1392161.55   | 0.40%             |  |  |  | No            |                  1 | On Loan: No      |
| Axis Capital Holdings Ltd                | Axis Capital Holdings Ltd                | CUSIP: 000000000<br>LEI: 635400VD2NQBYAHMEM55 | Long             | EC               | CORP              | BM        |     14722 | NS      | $1505177.28   | 0.43%             |  |  |  | No            |                  1 | On Loan: No      |
| Accenture PLC                            | Accenture PLC                            | CUSIP: 000000000<br>LEI: 5493000EWHDSR3MZWH98 | Long             | EC               | CORP              | IE        |     21825 | NS      | $5456250.00   | 1.57%             |  |  |  | No            |                  1 | On Loan: No      |
| Eaton Corp PLC                           | Eaton Corp PLC                           | CUSIP: 000000000<br>LEI: 549300VDIGTMXUNT7H71 | Long             | EC               | CORP              | IE        |      6031 | NS      | $2086062.59   | 0.60%             |  |  |  | No            |                  1 | On Loan: No      |
| Everest Group Ltd                        | Everest Group Ltd                        | CUSIP: 000000000<br>LEI: 549300N24XF2VV0B3570 | Long             | EC               | CORP              | BM        |     14062 | NS      | $4419545.98   | 1.27%             |  |  |  | No            |                  1 | On Loan: No      |
| Medtronic PLC                            | Medtronic PLC                            | CUSIP: 000000000<br>LEI: 549300GX3ZBSQWUXY261 | Long             | EC               | CORP              | IE        |     42809 | NS      | $4509071.97   | 1.29%             |  |  |  | No            |                  1 | On Loan: No      |
| Pentair PLC                              | Pentair PLC                              | CUSIP: 000000000<br>LEI: 549300EVR9D56WPSRP15 | Long             | EC               | CORP              | IE        |     13080 | NS      | $1376539.20   | 0.40%             |  |  |  | No            |                  1 | On Loan: No      |
| STERIS PLC                               | STERIS PLC                               | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | IE        |     13607 | NS      | $3623271.96   | 1.04%             |  |  |  | No            |                  1 | On Loan: No      |
| TE Connectivity PLC                      | TE Connectivity PLC                      | CUSIP: 000000000<br>LEI: 6367003TB6K484NFHE54 | Long             | EC               | CORP              | IE        |     28223 | NS      | $6382631.45   | 1.83%             |  |  |  | No            |                  1 | On Loan: No      |
| Chubb Ltd                                | Chubb Ltd                                | CUSIP: 000000000<br>LEI: E0JAN6VLUDI1HITHT809 | Long             | EC               | CORP              | CH        |     14047 | NS      | $4160440.46   | 1.19%             |  |  |  | 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