# EDGAR Filing Document

**Accession Number:** 0000783740
**File Stem:** 0001410368-26-040068
**Filing Date:** 2026-4
**Character Count:** 67054
**Document Hash:** 7803bbe0188b24988915de7ab3a9af6b
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-040068.hdr.sgml**: 20260424

**ACCESSION NUMBER**: 0001410368-26-040068

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 4

**CONFORMED PERIOD OF REPORT**: 20260228

**FILED AS OF DATE**: 20260424

**DATE AS OF CHANGE**: 20260424

**PERIOD START**: 20260531

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MFS SERIES TRUST X
- **CENTRAL INDEX KEY:** 0000783740

**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:** 811-04492
- **FILM NUMBER:** 26892050

**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 GOVERNMENT MORTGAGE FUND
- **DATE OF NAME CHANGE:** 19930408

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MFS GOVERNMENT INCOME PLUS FUND
- **DATE OF NAME CHANGE:** 19930312

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MASSACHUSETTS MFS GOVERNMENT INCOME PLUS FUND
- **DATE OF NAME CHANGE:** 19921015

## Series and Classes Contracts Data

### MFS Blended Research Value Equity Fund (Series ID: S000050660)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000160038 | A            | BRUDX           |
| C000160039 | B            | BRUEX           |
| C000160040 | C            | BRUGX           |
| C000160041 | I            | BRUHX           |
| C000160042 | R1           | BRUJX           |
| C000160043 | R2           | BRUKX           |
| C000160044 | R3           | BRULX           |
| C000160045 | R4           | BRUMX           |
| C000160046 | R6           | BRUNX           |

## Nport-Ex

BRU-Q3

![](imgab8861191.gif)

**Quarterly Report**

February 28, 2026

MFS<sup>®</sup> Blended Research<sup>®</sup> <br>Value Equity Fund

![](imgffbfbe192.gif)

------

**Portfolio of Investments**

2/28/26 (unaudited)

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

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

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – 99.7%  | Common Stocks – 99.7%  | Common Stocks – 99.7%  |
| Aerospace & Defense – 3.4% | Aerospace & Defense – 3.4% |  |
| BWX Technologies, Inc. | 16775 | &nbsp;&nbsp;&nbsp; $3455315 |
| Curtiss-Wright Corp. | 1272 | &nbsp;&nbsp;&nbsp; 890820 |
| General Dynamics Corp. | 13264 | &nbsp;&nbsp;&nbsp; 4735911 |
| Leidos Holdings, Inc. | 6863 | &nbsp;&nbsp;&nbsp; 1201711 |
| RTX Corp. | 3350 | &nbsp;&nbsp;&nbsp; 678777 |
|  |  | &nbsp;&nbsp;&nbsp; $10962534 |
| Automotive – 0.4% | Automotive – 0.4% |  |
| Aptiv PLC (a)  | 17044 | &nbsp;&nbsp;&nbsp; $1253416 |
| Biotechnology – 1.4% | Biotechnology – 1.4% |  |
| Gilead Sciences, Inc.  | 30581 | &nbsp;&nbsp;&nbsp; $4555040 |
| Broadcasting – 1.5% | Broadcasting – 1.5% |  |
| TKO Group Holdings, Inc. | 10775 | &nbsp;&nbsp;&nbsp; $2412199 |
| Walt Disney Co. | 24325 | &nbsp;&nbsp;&nbsp; 2579423 |
|  |  | &nbsp;&nbsp;&nbsp; $4991622 |
| Brokerage & Asset Managers – 4.4% | Brokerage & Asset Managers – 4.4% |  |
| Charles Schwab Corp. | 18948 | &nbsp;&nbsp;&nbsp; $1803849 |
| Citigroup, Inc. | 53452 | &nbsp;&nbsp;&nbsp; 5889876 |
| Interactive Brokers Group, Inc. | 47700 | &nbsp;&nbsp;&nbsp; 3395763 |
| Raymond James Financial, Inc. | 21510 | &nbsp;&nbsp;&nbsp; 3292751 |
|  |  | &nbsp;&nbsp;&nbsp; $14382239 |
| Business Services – 1.0% | Business Services – 1.0% |  |
| Accenture PLC, "A" | 7899 | &nbsp;&nbsp;&nbsp; $1648679 |
| Cognizant Technology Solutions Corp., "A" | 17501 | &nbsp;&nbsp;&nbsp; 1127590 |
| Dropbox, Inc. (a) | 21774 | &nbsp;&nbsp;&nbsp; 544132 |
|  |  | &nbsp;&nbsp;&nbsp; $3320401 |
| Chemicals – 0.2% | Chemicals – 0.2% |  |
| Eastman Chemical Co.  | 9800 | &nbsp;&nbsp;&nbsp; $739998 |
| Computer Software – 2.4% | Computer Software – 2.4% |  |
| Microsoft Corp. | 1570 | &nbsp;&nbsp;&nbsp; $616602 |
| Okta, Inc. (a) | 28624 | &nbsp;&nbsp;&nbsp; 2075240 |
| Salesforce, Inc. | 21051 | &nbsp;&nbsp;&nbsp; 4100524 |
| Zoom Communications, Inc. (a) | 13652 | &nbsp;&nbsp;&nbsp; 1009429 |
|  |  | &nbsp;&nbsp;&nbsp; $7801795 |
| Computer Software - Systems – 0.5% | Computer Software - Systems – 0.5% |  |
| Western Digital Corp.  | 5510 | &nbsp;&nbsp;&nbsp; $1541147 |
| Construction – 1.8% | Construction – 1.8% |  |
| CRH PLC | 30448 | &nbsp;&nbsp;&nbsp; $3653151 |
| Ferguson Enterprises, Inc. | 8583 | &nbsp;&nbsp;&nbsp; 2238103 |
|  |  | &nbsp;&nbsp;&nbsp; $5891254 |
| Consumer Products – 2.1% | Consumer Products – 2.1% |  |
| Colgate-Palmolive Co. | 42294 | &nbsp;&nbsp;&nbsp; $4193027 |
| Kimberly-Clark Corp. | 24516 | &nbsp;&nbsp;&nbsp; 2732063 |
|  |  | &nbsp;&nbsp;&nbsp; $6925090 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Consumer Services – 0.8% | Consumer Services – 0.8% |  |
| Booking Holdings, Inc. | 397 | &nbsp;&nbsp;&nbsp; $1683022 |
| Uber Technologies, Inc. (a) | 12761 | &nbsp;&nbsp;&nbsp; 962435 |
|  |  | &nbsp;&nbsp;&nbsp; $2645457 |
| Electrical Equipment – 2.4% | Electrical Equipment – 2.4% |  |
| AMETEK, Inc. | 2979 | &nbsp;&nbsp;&nbsp; $712636 |
| Amphenol Corp., "A" | 16874 | &nbsp;&nbsp;&nbsp; 2464617 |
| Eaton Corp. PLC | 12184 | &nbsp;&nbsp;&nbsp; 4580209 |
|  |  | &nbsp;&nbsp;&nbsp; $7757462 |
| Electronics – 5.3% | Electronics – 5.3% |  |
| Advanced Micro Devices (a) | 5638 | &nbsp;&nbsp;&nbsp; $1128784 |
| Analog Devices, Inc. | 6423 | &nbsp;&nbsp;&nbsp; 2285239 |
| Flex Ltd. (a) | 43478 | &nbsp;&nbsp;&nbsp; 2739984 |
| Intel Corp. (a) | 17952 | &nbsp;&nbsp;&nbsp; 818791 |
| KLA Corp. | 1415 | &nbsp;&nbsp;&nbsp; 2157238 |
| Lam Research Corp. | 14387 | &nbsp;&nbsp;&nbsp; 3364975 |
| Micron Technology, Inc. | 11490 | &nbsp;&nbsp;&nbsp; 4738131 |
|  |  | &nbsp;&nbsp;&nbsp; $17233142 |
| Energy - Independent – 4.6% | Energy - Independent – 4.6% |  |
| ConocoPhillips | 29555 | &nbsp;&nbsp;&nbsp; $3353311 |
| EOG Resources, Inc. | 33689 | &nbsp;&nbsp;&nbsp; 4180131 |
| Phillips 66 | 32246 | &nbsp;&nbsp;&nbsp; 4976525 |
| Valero Energy Corp. | 12566 | &nbsp;&nbsp;&nbsp; 2571506 |
|  |  | &nbsp;&nbsp;&nbsp; $15081473 |
| Energy - Integrated – 1.0% | Energy - Integrated – 1.0% |  |
| Exxon Mobil Corp.  | 20576 | &nbsp;&nbsp;&nbsp; $3137840 |
| Energy - Renewables – 0.6% | Energy - Renewables – 0.6% |  |
| AES Corp.  | 103599 | &nbsp;&nbsp;&nbsp; $1790191 |
| Engineering - Construction – 0.2% | Engineering - Construction – 0.2% |  |
| Jacobs Solutions, Inc.  | 4419 | &nbsp;&nbsp;&nbsp; $609203 |
| Food & Beverages – 1.1% | Food & Beverages – 1.1% |  |
| General Mills, Inc. | 24435 | &nbsp;&nbsp;&nbsp; $1105195 |
| PepsiCo, Inc. | 14509 | &nbsp;&nbsp;&nbsp; 2462758 |
|  |  | &nbsp;&nbsp;&nbsp; $3567953 |
| Food & Drug Stores – 0.4% | Food & Drug Stores – 0.4% |  |
| Albertsons Cos., Inc., "A" | 73454 | &nbsp;&nbsp;&nbsp; $1314827 |
| General Merchandise – 0.9% | General Merchandise – 0.9% |  |
| Dollar General Corp.  | 18398 | &nbsp;&nbsp;&nbsp; $2874504 |
| Health Maintenance Organizations – 1.8% | Health Maintenance Organizations – 1.8% |  |
| Cigna Group | 13807 | &nbsp;&nbsp;&nbsp; $4001545 |
| Humana, Inc. | 8940 | &nbsp;&nbsp;&nbsp; 1703427 |
|  |  | &nbsp;&nbsp;&nbsp; $5704972 |
| Insurance – 6.8% | Insurance – 6.8% |  |
| American International Group, Inc. | 30526 | &nbsp;&nbsp;&nbsp; $2457038 |
| Ameriprise Financial, Inc. | 6613 | &nbsp;&nbsp;&nbsp; 3108903 |
| Berkshire Hathaway, Inc., "B" (a) | 10218 | &nbsp;&nbsp;&nbsp; 5159579 |
| Chubb Ltd. | 16003 | &nbsp;&nbsp;&nbsp; 5454783 |
| Equitable Holdings, Inc. | 53421 | &nbsp;&nbsp;&nbsp; 2148593 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Insurance – continued | Insurance – continued |  |
| Everest Group Ltd. | 2800 | &nbsp;&nbsp;&nbsp; $939372 |
| Hartford Insurance Group, Inc. | 13703 | &nbsp;&nbsp;&nbsp; 1929793 |
| Voya Financial, Inc. | 12156 | &nbsp;&nbsp;&nbsp; 812993 |
|  |  | &nbsp;&nbsp;&nbsp; $22011054 |
| Interactive Media Services – 4.1% | Interactive Media Services – 4.1% |  |
| Alphabet, Inc., "A" | 24645 | &nbsp;&nbsp;&nbsp; $7683325 |
| Meta Platforms, Inc., "A" | 8453 | &nbsp;&nbsp;&nbsp; 5479066 |
|  |  | &nbsp;&nbsp;&nbsp; $13162391 |
| Leisure & Toys – 2.1% | Leisure & Toys – 2.1% |  |
| Brunswick Corp. | 49568 | &nbsp;&nbsp;&nbsp; $3946604 |
| Electronic Arts, Inc. | 11050 | &nbsp;&nbsp;&nbsp; 2216298 |
| Take-Two Interactive Software, Inc. (a) | 2572 | &nbsp;&nbsp;&nbsp; 543927 |
|  |  | &nbsp;&nbsp;&nbsp; $6706829 |
| Machinery & Tools – 6.2% | Machinery & Tools – 6.2% |  |
| AGCO Corp. | 29412 | &nbsp;&nbsp;&nbsp; $4014738 |
| Caterpillar, Inc. | 9386 | &nbsp;&nbsp;&nbsp; 6972202 |
| Deere & Co. | 4152 | &nbsp;&nbsp;&nbsp; 2614556 |
| Flowserve Corp. | 15637 | &nbsp;&nbsp;&nbsp; 1384187 |
| Wabtec Corp. | 19848 | &nbsp;&nbsp;&nbsp; 5238880 |
|  |  | &nbsp;&nbsp;&nbsp; $20224563 |
| Major Banks – 4.4% | Major Banks – 4.4% |  |
| Bank of America Corp. | 26625 | &nbsp;&nbsp;&nbsp; $1326724 |
| Goldman Sachs Group, Inc. | 4102 | &nbsp;&nbsp;&nbsp; 3525956 |
| JPMorgan Chase & Co. | 14699 | &nbsp;&nbsp;&nbsp; 4414109 |
| Wells Fargo & Co. | 62255 | &nbsp;&nbsp;&nbsp; 5070670 |
|  |  | &nbsp;&nbsp;&nbsp; $14337459 |
| Medical & Health Technology & Services – 1.5% | Medical & Health Technology & Services – 1.5% |  |
| IQVIA Holdings, Inc. (a) | 4453 | &nbsp;&nbsp;&nbsp; $796241 |
| McKesson Corp. | 3285 | &nbsp;&nbsp;&nbsp; 3243511 |
| Ventas, Inc., REIT | 8733 | &nbsp;&nbsp;&nbsp; 752435 |
|  |  | &nbsp;&nbsp;&nbsp; $4792187 |
| Medical Equipment – 2.6% | Medical Equipment – 2.6% |  |
| Boston Scientific Corp. (a) | 16637 | &nbsp;&nbsp;&nbsp; $1278553 |
| Envista Holdings Corp. (a) | 28885 | &nbsp;&nbsp;&nbsp; 843731 |
| Medtronic PLC | 46266 | &nbsp;&nbsp;&nbsp; 4518338 |
| Thermo Fisher Scientific, Inc. | 3512 | &nbsp;&nbsp;&nbsp; 1830138 |
|  |  | &nbsp;&nbsp;&nbsp; $8470760 |
| Metals & Mining – 0.2% | Metals & Mining – 0.2% |  |
| Freeport-McMoRan, Inc.  | 11180 | &nbsp;&nbsp;&nbsp; $761134 |
| Natural Gas - Distribution – 0.6% | Natural Gas - Distribution – 0.6% |  |
| Atmos Energy Corp.  | 10950 | &nbsp;&nbsp;&nbsp; $2045351 |
| Network & Telecom – 0.7% | Network & Telecom – 0.7% |  |
| Ciena Corp. (a) | 2670 | &nbsp;&nbsp;&nbsp; $931029 |
| Qualcomm, Inc. | 9057 | &nbsp;&nbsp;&nbsp; 1289355 |
|  |  | &nbsp;&nbsp;&nbsp; $2220384 |
| Oil Services – 1.5% | Oil Services – 1.5% |  |
| TechnipFMC PLC  | 72794 | &nbsp;&nbsp;&nbsp; $4826970 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Other Banks & Diversified Financials – 4.9% | Other Banks & Diversified Financials – 4.9% |  |
| American Express Co. | 9240 | &nbsp;&nbsp;&nbsp; $2854236 |
| Mastercard, Inc., "A" | 4177 | &nbsp;&nbsp;&nbsp; 2160386 |
| Northern Trust Corp. | 33069 | &nbsp;&nbsp;&nbsp; 4731843 |
| Popular, Inc. | 35159 | &nbsp;&nbsp;&nbsp; 4759122 |
| Visa, Inc., "A" | 4090 | &nbsp;&nbsp;&nbsp; 1309373 |
|  |  | &nbsp;&nbsp;&nbsp; $15814960 |
| Pharmaceuticals – 5.7% | Pharmaceuticals – 5.7% |  |
| Bristol-Myers Squibb Co. | 41672 | &nbsp;&nbsp;&nbsp; $2599082 |
| Johnson & Johnson | 43618 | &nbsp;&nbsp;&nbsp; 10836020 |
| Pfizer, Inc. | 185235 | &nbsp;&nbsp;&nbsp; 5121748 |
|  |  | &nbsp;&nbsp;&nbsp; $18556850 |
| Precious Metals & Minerals – 1.3% | Precious Metals & Minerals – 1.3% |  |
| AngloGold Ashanti PLC | 15875 | &nbsp;&nbsp;&nbsp; $2028349 |
| Newmont Corp. | 17108 | &nbsp;&nbsp;&nbsp; 2224040 |
|  |  | &nbsp;&nbsp;&nbsp; $4252389 |
| Railroad & Shipping – 1.1% | Railroad & Shipping – 1.1% |  |
| Union Pacific Corp.  | 13337 | &nbsp;&nbsp;&nbsp; $3534038 |
| Real Estate – 2.4% | Real Estate – 2.4% |  |
| Essential Properties Realty Trust, REIT | 90377 | &nbsp;&nbsp;&nbsp; $3067395 |
| Jones Lang LaSalle, Inc. (a) | 1874 | &nbsp;&nbsp;&nbsp; 591341 |
| Simon Property Group, Inc., REIT | 5068 | &nbsp;&nbsp;&nbsp; 1033112 |
| W.P. Carey, Inc., REIT | 43167 | &nbsp;&nbsp;&nbsp; 3222416 |
|  |  | &nbsp;&nbsp;&nbsp; $7914264 |
| Real Estate - Office – 1.3% | Real Estate - Office – 1.3% |  |
| Cousins Properties, Inc., REIT | 105738 | &nbsp;&nbsp;&nbsp; $2448892 |
| Highwoods Properties, Inc., REIT | 81845 | &nbsp;&nbsp;&nbsp; 1840694 |
|  |  | &nbsp;&nbsp;&nbsp; $4289586 |
| Restaurants – 1.2% | Restaurants – 1.2% |  |
| Aramark  | 96537 | &nbsp;&nbsp;&nbsp; $4040074 |
| Specialty Chemicals – 1.0% | Specialty Chemicals – 1.0% |  |
| Linde PLC | 3693 | &nbsp;&nbsp;&nbsp; $1876339 |
| RPM International, Inc. | 11700 | &nbsp;&nbsp;&nbsp; 1335204 |
|  |  | &nbsp;&nbsp;&nbsp; $3211543 |
| Specialty Stores – 4.6% | Specialty Stores – 4.6% |  |
| Amazon.com, Inc. (a) | 31107 | &nbsp;&nbsp;&nbsp; $6532470 |
| Home Depot, Inc. | 4031 | &nbsp;&nbsp;&nbsp; 1534682 |
| O'Reilly Automotive, Inc. (a) | 36979 | &nbsp;&nbsp;&nbsp; 3471589 |
| Target Corp. | 12770 | &nbsp;&nbsp;&nbsp; 1453098 |
| TJX Cos., Inc. | 12408 | &nbsp;&nbsp;&nbsp; 2005877 |
|  |  | &nbsp;&nbsp;&nbsp; $14997716 |
| Telecom Services – 0.6% | Telecom Services – 0.6% |  |
| AT&T, Inc.  | 70970 | &nbsp;&nbsp;&nbsp; $1987870 |
| Tobacco – 2.1% | Tobacco – 2.1% |  |
| Altria Group, Inc. | 34425 | &nbsp;&nbsp;&nbsp; $2376702 |
| Philip Morris International, Inc. | 23473 | &nbsp;&nbsp;&nbsp; 4385461 |
|  |  | &nbsp;&nbsp;&nbsp; $6762163 |
| Trucking – 0.2% | Trucking – 0.2% |  |
| J.B. Hunt Transport Services, Inc.  | 3320 | &nbsp;&nbsp;&nbsp; $774921 |

---

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*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Common Stocks – continued  | Common Stocks – continued  | Common Stocks – continued  |
| Utilities - Electric Power – 4.4% | Utilities - Electric Power – 4.4% |  |
| Duke Energy Corp. | 18287 | &nbsp;&nbsp;&nbsp; $2392854 |
| Edison International | 31316 | &nbsp;&nbsp;&nbsp; 2340558 |
| NextEra Energy, Inc. | 37732 | &nbsp;&nbsp;&nbsp; 3538130 |
| PG&E Corp. | 230496 | &nbsp;&nbsp;&nbsp; 4379424 |
| Portland General Electric Co. | 13570 | &nbsp;&nbsp;&nbsp; 732237 |
| Southern Co. | 8458 | &nbsp;&nbsp;&nbsp; 823640 |
|  |  | &nbsp;&nbsp;&nbsp; $14206843 |
| **Total Common Stocks**  |  | &nbsp;&nbsp; **$323983859** |
| Mutual Funds (h) – 0.2%  | Mutual Funds (h) – 0.2%  | Mutual Funds (h) – 0.2%  |
| Money Market Funds – 0.2% | Money Market Funds – 0.2% |  |
| MFS Institutional Money Market Portfolio, 3.7% (v)  | 755480 | &nbsp;&nbsp;&nbsp; $755556 |
| Other Assets, Less Liabilities – 0.1% |  | &nbsp;&nbsp;&nbsp; 298350 |
| **Net Assets – 100.0%** | **Net Assets – 100.0%** | &nbsp;&nbsp; **$325037765** |

---

&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 $755,556 and $323,983,859, 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**

2/28/26 (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 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 February 28, 2026 in valuing the fund's assets and liabilities:

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Financial Instruments** | **Level 1** | **Level 2** | **Level 3** | **Total** |
| Equity Securities | &nbsp;&nbsp;&nbsp; $323983859 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $323983859 |
| Investment Companies | &nbsp;&nbsp;&nbsp; 755556 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 755556 |
| Total | &nbsp;&nbsp;&nbsp; $324739415 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $324739415 |

---

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 February 28, 2026:

&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; $2013676 | &nbsp;&nbsp; $22114895 | &nbsp;&nbsp; $23373461 | &nbsp;&nbsp; $446 | &nbsp;&nbsp; $— | &nbsp;&nbsp; $755556<br>|

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

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| | | |
|:---|:---|:---|
| **Affiliated Issuers** | **Dividend** <br>**Income**<br>| **Capital Gain** <br>**Distributions**<br>|
| MFS Institutional Money Market Portfolio  | &nbsp;&nbsp; $63625 | &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 X

- **b. Investment Company Act file number:** 811-04492

- **c. CIK number of Registrant:** 0000783740

- **d. LEI of Registrant:** 5493001MUVNRNUPJY164

- **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 Blended Research Value Equity Fund

- **b. EDGAR series identifier (if any):** S000050660

- **c. LEI of Series:** 549300QL66OEPI6JSE90

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

- **a. Date of fiscal year-end:** 2026-05-31

- **b. Date as of which information is reported:** 2026-02-28

**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:** $325236679.43

**Total Liabilities:** $160442.00

**Net Assets:** $325076237.43

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000160041 | 1.07%                | 5.17%                | 2.25%                |
| Class ID C000160040 | 1.02%                | 5.05%                | 2.16%                |
| Class ID C000160042 | 1.02%                | 5.15%                | 2.20%                |
| Class ID C000160045 | 1.07%                | 5.16%                | 2.24%                |
| Class ID C000160043 | 1.01%                | 5.12%                | 2.19%                |
| Class ID C000160044 | 1.06%                | 5.12%                | 2.25%                |
| Class ID C000160046 | 1.07%                | 5.16%                | 2.24%                |
| Class ID C000160038 | 1.07%                | 5.12%                | 2.22%                |
| Class ID C000160039 | 1.01%                | 5.04%                | 2.19%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $730338.16               | $2175026.00                                |
| Month 2  | $5205046.99              | $10474280.46                               |
| Month 3  | $5793825.92              | $1015854.80                                |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| Equitable Holdings Inc                   | Equitable Holdings Inc                   | CUSIP: 29452E101<br>LEI: 549300FIBAKMNHPZ4009 | Long             | EC               | CORP              | US        |     53421 | NS      | $2148592.62   | 0.66%             |  |  |  | No            |                  1 | On Loan: No      |
| Salesforce Inc                           | Salesforce Inc                           | CUSIP: 79466L302<br>LEI: RCGZFPDMRW58VJ54VR07 | Long             | EC               | CORP              | US        |     21051 | NS      | $4100524.29   | 1.26%             |  |  |  | No            |                  1 | On Loan: No      |
| Dollar General Corp                      | Dollar General Corp                      | CUSIP: 256677105<br>LEI: OPX52SQVOZI8IVSWYU66 | Long             | EC               | CORP              | US        |     18398 | NS      | $2874503.52   | 0.88%             |  |  |  | No            |                  1 | On Loan: No      |
| Accenture PLC                            | Accenture PLC                            | CUSIP: 000000000<br>LEI: 5493000EWHDSR3MZWH98 | Long             | EC               | CORP              | IE        |      7899 | NS      | $1648679.28   | 0.51%             |  |  |  | No            |                  1 | On Loan: No      |
| AMETEK Inc                               | AMETEK Inc                               | CUSIP: 031100100<br>LEI: 549300WZDEF9KKE40E98 | Long             | EC               | CORP              | US        |      2979 | NS      | $712636.38    | 0.22%             |  |  |  | No            |                  1 | On Loan: No      |
| Western Digital Corp                     | Western Digital Corp                     | CUSIP: 958102105<br>LEI: 549300QQXOOYEF89IC56 | Long             | EC               | CORP              | US        |      5510 | NS      | $1541147.00   | 0.47%             |  |  |  | No            |                  1 | On Loan: No      |
| Jones Lang LaSalle Inc                   | Jones Lang LaSalle Inc                   | CUSIP: 48020Q107<br>LEI: 6SYKCME112RT8TQUO411 | Long             | EC               | CORP              | US        |      1874 | NS      | $591340.70    | 0.18%             |  |  |  | No            |                  1 | On Loan: No      |
| Okta Inc                                 | Okta Inc                                 | CUSIP: 679295105<br>LEI: 549300N8J06I8MRHU620 | Long             | EC               | CORP              | US        |     28624 | NS      | $2075240.00   | 0.64%             |  |  |  | No            |                  1 | On Loan: No      |
| Union Pacific Corp                       | Union Pacific Corp                       | CUSIP: 907818108<br>LEI: 549300LMMRSZZCZ8CL11 | Long             | EC               | CORP              | US        |     13337 | NS      | $3534038.26   | 1.09%             |  |  |  | No            |                  1 | On Loan: No      |
| Johnson & Johnson                        | Johnson & Johnson                        | CUSIP: 478160104<br>LEI: 549300G0CFPGEF6X2043 | Long             | EC               | CORP              | US        |     43618 | NS      | $10836019.74  | 3.33%             |  |  |  | No            |                  1 | On Loan: No      |
| Highwoods Properties Inc                 | Highwoods Properties Inc                 | CUSIP: 431284108<br>LEI: ZIIGTYKL9T0X3HLTDX53 | Long             | EC               | CORP              | US        |     81845 | NS      | $1840694.05   | 0.57%             |  |  |  | No            |                  1 | On Loan: No      |
| Philip Morris International Inc          | Philip Morris International Inc          | CUSIP: 718172109<br>LEI: HL3H1H2BGXWVG3BSWR90 | Long             | EC               | CORP              | US        |     23473 | NS      | $4385460.59   | 1.35%             |  |  |  | No            |                  1 | On Loan: No      |
| Essential Properties Realty Trust Inc    | Essential Properties Realty Trust Inc    | CUSIP: 29670E107<br>LEI: 2549009LXQLVYCGLZO50 | Long             | EC               | CORP              | US        |     90377 | NS      | $3067395.38   | 0.94%             |  |  |  | No            |                  1 | On Loan: No      |
| Valero Energy Corp                       | Valero Energy Corp                       | CUSIP: 91913Y100<br>LEI: 549300XTO5VR8SKV1V74 | Long             | EC               | CORP              | US        |     12566 | NS      | $2571506.24   | 0.79%             |  |  |  | No            |                  1 | On Loan: No      |
| Amphenol Corp                            | Amphenol Corp                            | CUSIP: 032095101<br>LEI: 549300D3L3G0R4U4VT04 | Long             | EC               | CORP              | US        |     16874 | NS      | $2464616.44   | 0.76%             |  |  |  | No            |                  1 | On Loan: No      |
| Wells Fargo & Co                         | Wells Fargo & Co                         | CUSIP: 949746101<br>LEI: PBLD0EJDB5FWOLXP3B76 | Long             | EC               | CORP              | US        |     62255 | NS      | $5070669.75   | 1.56%             |  |  |  | No            |                  1 | On Loan: No      |
| Northern Trust Corp                      | Northern Trust Corp                      | CUSIP: 665859104<br>LEI: 549300GLF98S992BC502 | Long             | EC               | CORP              | US        |     33069 | NS      | $4731843.21   | 1.46%             |  |  |  | No            |                  1 | On Loan: No      |
| NextEra Energy Inc                       | NextEra Energy Inc                       | CUSIP: 65339F101<br>LEI: 254900RHL9MEUS5NKX63 | Long             | EC               | CORP              | US        |     37732 | NS      | $3538129.64   | 1.09%             |  |  |  | No            |                  1 | On Loan: No      |
| WP Carey Inc                             | WP Carey Inc                             | CUSIP: 92936U109<br>LEI: 54930042CRNE713E3Q67 | Long             | EC               | CORP              | US        |     43167 | NS      | $3222416.55   | 0.99%             |  |  |  | No            |                  1 | On Loan: No      |
| General Mills Inc                        | General Mills Inc                        | CUSIP: 370334104<br>LEI: 2TGYMUGI08PO8X8L6150 | Long             | EC               | CORP              | US        |     24435 | NS      | $1105195.05   | 0.34%             |  |  |  | No            |                  1 | On Loan: No      |
| Interactive Brokers Group Inc            | Interactive Brokers Group Inc            | CUSIP: 45841N107<br>LEI: 5493004DT6DCDUZNDM53 | Long             | EC               | CORP              | US        |     47700 | NS      | $3395763.00   | 1.04%             |  |  |  | No            |                  1 | On Loan: No      |
| Ventas Inc                               | Ventas Inc                               | CUSIP: 92276F100<br>LEI: ORQTRC074CWLT3DKHT41 | Long             | EC               | CORP              | US        |      8733 | NS      | $752435.28    | 0.23%             |  |  |  | No            |                  1 | On Loan: No      |
| Thermo Fisher Scientific Inc             | Thermo Fisher Scientific Inc             | CUSIP: 883556102<br>LEI: HCHV7422L5HDJZCRFL38 | Long             | EC               | CORP              | US        |      3512 | NS      | $1830138.32   | 0.56%             |  |  |  | No            |                  1 | On Loan: No      |
| Anglogold Ashanti Plc                    | Anglogold Ashanti Plc                    | CUSIP: 000000000<br>LEI: 2138005YDSA7A82RNU96 | Long             | EC               | CORP              | GB        |     15875 | NS      | $2028348.75   | 0.62%             |  |  |  | No            |                  1 | On Loan: No      |
| Everest Group Ltd                        | Everest Group Ltd                        | CUSIP: 000000000<br>LEI: 549300N24XF2VV0B3570 | Long             | EC               | CORP              | BM        |      2800 | NS      | $939372.00    | 0.29%             |  |  |  | No            |                  1 | On Loan: No      |
| Uber Technologies Inc                    | Uber Technologies Inc                    | CUSIP: 90353T100<br>LEI: 549300B2FTG34FILDR98 | Long             | EC               | CORP              | US        |     12761 | NS      | $962434.62    | 0.30%             |  |  |  | No            |                  1 | On Loan: No      |
| Cognizant Technology Solutions Corp      | Cognizant Technology Solutions Corp      | CUSIP: 192446102<br>LEI: 5493006IEVQEFQO40L83 | Long             | EC               | CORP              | US        |     17501 | NS      | $1127589.43   | 0.35%             |  |  |  | No            |                  1 | On Loan: No      |
| EOG Resources Inc                        | EOG Resources Inc                        | CUSIP: 26875P101<br>LEI: XWTZDRYZPBUHIQBKDB46 | Long             | EC               | CORP              | US        |     33689 | NS      | $4180131.12   | 1.29%             |  |  |  | No            |                  1 | On Loan: No      |
| Aramark                                  | Aramark                                  | CUSIP: 03852U106<br>LEI: 549300MR6PG2DWZUIL39 | Long             | EC               | CORP              | US        |     96537 | NS      | $4040073.45   | 1.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Micron Technology Inc                    | Micron Technology Inc                    | CUSIP: 595112103<br>LEI: B3DXGBC8GAIYWI2Z0172 | Long             | EC               | CORP              | US        |     11490 | NS      | $4738131.30   | 1.46%             |  |  |  | No            |                  1 | On Loan: No      |
| Citigroup Inc                            | Citigroup Inc                            | CUSIP: 172967424<br>LEI: 6SHGI4ZSSLCXXQSBB395 | Long             | EC               | CORP              | US        |     53452 | NS      | $5889875.88   | 1.81%             |  |  |  | No            |                  1 | On Loan: No      |
| Chubb Ltd                                | Chubb Ltd                                | CUSIP: 000000000<br>LEI: E0JAN6VLUDI1HITHT809 | Long             | EC               | CORP              | CH        |     16003 | NS      | $5454782.58   | 1.68%             |  |  |  | No            |                  1 | On Loan: No      |
| General Dynamics Corp                    | General Dynamics Corp                    | CUSIP: 369550108<br>LEI: 9C1X8XOOTYY2FNYTVH06 | Long             | EC               | CORP              | US        |     13264 | NS      | $4735911.20   | 1.46%             |  |  |  | No            |                  1 | On Loan: No      |
| Atmos Energy Corp                        | Atmos Energy Corp                        | CUSIP: 049560105<br>LEI: QVLWEGTD2S8GJMO8D383 | Long             | EC               | CORP              | US        |     10950 | NS      | $2045350.50   | 0.63%             |  |  |  | No            |                  1 | On Loan: No      |
| AGCO Corp                                | AGCO Corp                                | CUSIP: 001084102<br>LEI: LYOM0B2GCF1JWXK5ZG04 | Long             | EC               | CORP              | US        |     29412 | NS      | $4014738.00   | 1.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Dropbox Inc                              | Dropbox Inc                              | CUSIP: 26210C104<br>LEI: 549300JCDF7UAR6TJR51 | Long             | EC               | CORP              | US        |     21774 | NS      | $544132.26    | 0.17%             |  |  |  | No            |                  1 | On Loan: No      |
| Medtronic PLC                            | Medtronic PLC                            | CUSIP: 000000000<br>LEI: 549300GX3ZBSQWUXY261 | Long             | EC               | CORP              | IE        |     46266 | NS      | $4518337.56   | 1.39%             |  |  |  | No            |                  1 | On Loan: No      |
| Advanced Micro Devices Inc               | Advanced Micro Devices Inc               | CUSIP: 007903107<br>LEI: R2I72C950HOYXII45366 | Long             | EC               | CORP              | US        |      5638 | NS      | $1128783.98   | 0.35%             |  |  |  | No            |                  1 | On Loan: No      |
| PepsiCo Inc                              | PepsiCo Inc                              | CUSIP: 713448108<br>LEI: FJSUNZKFNQ5YPJ5OT455 | Long             | EC               | CORP              | US        |     14509 | NS      | $2462757.66   | 0.76%             |  |  |  | No            |                  1 | On Loan: No      |
| Alphabet Inc                             | Alphabet Inc                             | CUSIP: 02079K305<br>LEI: 5493006MHB84DD0ZWV18 | Long             | EC               | CORP              | US        |     24645 | NS      | $7683325.20   | 2.36%             |  |  |  | No            |                  1 | On Loan: No      |
| Phillips 66                              | Phillips 66                              | CUSIP: 718546104<br>LEI: 5493005JBO5YSIGK1814 | Long             | EC               | CORP              | US        |     32246 | NS      | $4976525.18   | 1.53%             |  |  |  | No            |                  1 | On Loan: No      |
| Visa Inc                                 | Visa Inc                                 | CUSIP: 92826C839<br>LEI: 549300JZ4OKEHW3DPJ59 | Long             | EC               | CORP              | US        |      4090 | NS      | $1309372.60   | 0.40%             |  |  |  | No            |                  1 | On Loan: No      |
| Southern Co/The                          | Southern Co/The                          | CUSIP: 842587107<br>LEI: 549300FC3G3YU2FBZD92 | Long             | EC               | CORP              | US        |      8458 | NS      | $823640.04    | 0.25%             |  |  |  | No            |                  1 | On Loan: No      |
| Eastman Chemical Co                      | Eastman Chemical Co                      | CUSIP: 277432100<br>LEI: FDPVHDGJ1IQZFK9KH630 | Long             | EC               | CORP              | US        |      9800 | NS      | $739998.00    | 0.23%             |  |  |  | No            |                  1 | On Loan: No      |
| Boston Scientific Corp                   | Boston Scientific Corp                   | CUSIP: 101137107<br>LEI: Y6ZDD9FP4P8JSSJMW954 | Long             | EC               | CORP              | US        |     16637 | NS      | $1278553.45   | 0.39%             |  |  |  | No            |                  1 | On Loan: No      |
| Lam Research Corp                        | Lam Research Corp                        | CUSIP: 512807306<br>LEI: 549300I4GMO6D34U1T02 | Long             | EC               | CORP              | US        |     14387 | NS      | $3364975.43   | 1.04%             |  |  |  | No            |                  1 | On Loan: No      |
| Leidos Holdings Inc                      | Leidos Holdings Inc                      | CUSIP: 525327102<br>LEI: 549300IUTGTP6EJP8124 | Long             | EC               | CORP              | US        |      6863 | NS      | $1201711.30   | 0.37%             |  |  |  | No            |                  1 | On Loan: No      |
| Raymond James Financial Inc              | Raymond James Financial Inc              | CUSIP: 754730109<br>LEI: RGUZHJ05YTITL6D76949 | Long             | EC               | CORP              | US        |     21510 | NS      | $3292750.80   | 1.01%             |  |  |  | No            |                  1 | On Loan: No      |
| Edison International                     | Edison International                     | CUSIP: 281020107<br>LEI: 549300I7ROF15MAEVP56 | Long             | EC               | CORP              | US        |     31316 | NS      | $2340557.84   | 0.72%             |  |  |  | No            |                  1 | On Loan: No      |
| TKO Group Holdings Inc                   | TKO Group Holdings Inc                   | CUSIP: 87256C101<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     10775 | NS      | $2412199.25   | 0.74%             |  |  |  | No            |                  1 | On Loan: No      |
| Albertsons Cos Inc                       | Albertsons Cos Inc                       | CUSIP: 013091103<br>LEI: 549300YKWOC0AOR16R51 | Long             | EC               | CORP              | US        |     73454 | NS      | $1314826.60   | 0.40%             |  |  |  | No            |                  1 | On Loan: No      |
| Microsoft Corp                           | Microsoft Corp                           | CUSIP: 594918104<br>LEI: INR2EJN1ERAN0W5ZP974 | Long             | EC               | CORP              | US        |      1570 | NS      | $616601.80    | 0.19%             |  |  |  | No            |                  1 | On Loan: No      |
| IQVIA Holdings Inc                       | IQVIA Holdings Inc                       | CUSIP: 46266C105<br>LEI: 549300W3R20NM4KQPH86 | Long             | EC               | CORP              | US        |      4453 | NS      | $796240.93    | 0.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Aptiv PLC                                | Aptiv PLC                                | CUSIP: 000000000<br>LEI: N/A                  | Long             | EC               | CORP              | JE        |     17044 | NS      | $1253415.76   | 0.39%             |  |  |  | No            |                  1 | On Loan: No      |
| Newmont Corp                             | Newmont Corp                             | CUSIP: 651639106<br>LEI: 549300VSP3RIX7FGDZ51 | Long             | EC               | CORP              | US        |     17108 | NS      | $2224040.00   | 0.68%             |  |  |  | No            |                  1 | On Loan: No      |
| Take-Two Interactive Software Inc        | Take-Two Interactive Software Inc        | CUSIP: 874054109<br>LEI: BOMSTHHJK882EWYX3334 | Long             | EC               | CORP              | US        |      2572 | NS      | $543926.56    | 0.17%             |  |  |  | No            |                  1 | On Loan: No      |
| Cigna Group/The                          | Cigna Group/The                          | CUSIP: 125523100<br>LEI: 549300VIWYMSIGT1U456 | Long             | EC               | CORP              | US        |     13807 | NS      | $4001544.74   | 1.23%             |  |  |  | No            |                  1 | On Loan: No      |
| O'Reilly Automotive Inc                  | O'Reilly Automotive Inc                  | CUSIP: 67103H107<br>LEI: 549300K2RLMQL149Q332 | Long             | EC               | CORP              | US        |     36979 | NS      | $3471588.52   | 1.07%             |  |  |  | No            |                  1 | On Loan: No      |
| Walt Disney Co/The                       | Walt Disney Co/The                       | CUSIP: 254687106<br>LEI: 549300GZKULIZ0WOW665 | Long             | EC               | CORP              | US        |     24325 | NS      | $2579423.00   | 0.79%             |  |  |  | No            |                  1 | On Loan: No      |
| Linde PLC                                | Linde PLC                                | CUSIP: 000000000<br>LEI: 5299003QR1WT0EF88V51 | Long             | EC               | CORP              | IE        |      3693 | NS      | $1876339.44   | 0.58%             |  |  |  | No            |                  1 | On Loan: No      |
| Target Corp                              | Target Corp                              | CUSIP: 87612E106<br>LEI: 8WDDFXB5T1Z6J0XC1L66 | Long             | EC               | CORP              | US        |     12770 | NS      | $1453098.30   | 0.45%             |  |  |  | No            |                  1 | On Loan: No      |
| Exxon Mobil Corp                         | Exxon Mobil Corp                         | CUSIP: 30231G102<br>LEI: J3WHBG0MTS7O8ZVMDC91 | Long             | EC               | CORP              | US        |     20576 | NS      | $3137840.00   | 0.97%             |  |  |  | No            |                  1 | On Loan: No      |
| Flowserve Corp                           | Flowserve Corp                           | CUSIP: 34354P105<br>LEI: 6Y0GK87T6V7NJKZJVM41 | Long             | EC               | CORP              | US        |     15637 | NS      | $1384187.24   | 0.43%             |  |  |  | No            |                  1 | On Loan: No      |
| Brunswick Corp/DE                        | Brunswick Corp/DE                        | CUSIP: 117043109<br>LEI: YM4O38W15AX4YLLQKU27 | Long             | EC               | CORP              | US        |     49568 | NS      | $3946604.16   | 1.21%             |  |  |  | No            |                  1 | On Loan: No      |
| Portland General Electric Co             | Portland General Electric Co             | CUSIP: 736508847<br>LEI: GJOUP9M7C39GLSK9R870 | Long             | EC               | CORP              | US        |     13570 | NS      | $732237.20    | 0.23%             |  |  |  | No            |                  1 | On Loan: No      |
| TJX Cos Inc/The                          | TJX Cos Inc/The                          | CUSIP: 872540109<br>LEI: V167QI9I69W364E2DY52 | Long             | EC               | CORP              | US        |     12408 | NS      | $2005877.28   | 0.62%             |  |  |  | No            |                  1 | On Loan: No      |
| BWX Technologies Inc                     | BWX Technologies Inc                     | CUSIP: 05605H100<br>LEI: 549300NP85N265KWMS58 | Long             | EC               | CORP              | US        |     16775 | NS      | $3455314.50   | 1.06%             |  |  |  | No            |                  1 | On Loan: No      |
| Berkshire Hathaway Inc                   | Berkshire Hathaway Inc                   | CUSIP: 084670702<br>LEI: 5493000C01ZX7D35SD85 | Long             | EC               | CORP              | US        |     10218 | NS      | $5159579.10   | 1.59%             |  |  |  | No            |                  1 | On Loan: No      |
| Mastercard Inc                           | Mastercard Inc                           | CUSIP: 57636Q104<br>LEI: AR5L2ODV9HN37376R084 | Long             | EC               | CORP              | US        |      4177 | NS      | $2160386.17   | 0.66%             |  |  |  | No            |                  1 | On Loan: No      |
| AT&T Inc                                 | AT&T Inc                                 | CUSIP: 00206R102<br>LEI: 549300Z40J86GGSTL398 | Long             | EC               | CORP              | US        |     70970 | NS      | $1987869.70   | 0.61%             |  |  |  | No            |                  1 | On Loan: No      |
| Popular Inc                              | Popular Inc                              | CUSIP: 733174700<br>LEI: 5493008CARDZMVQ3LO89 | Long             | EC               | CORP              | PR        |     35159 | NS      | $4759122.24   | 1.46%             |  |  |  | No            |                  1 | On Loan: No      |
| Bank of America Corp                     | Bank of America Corp                     | CUSIP: 060505104<br>LEI: 9DJT3UXIJIZJI4WXO774 | Long             | EC               | CORP              | US        |     26625 | NS      | $1326723.75   | 0.41%             |  |  |  | No            |                  1 | On Loan: No      |
| Home Depot Inc/The                       | Home Depot Inc/The                       | CUSIP: 437076102<br>LEI: QEKMOTMBBKA8I816DO57 | Long             | EC               | CORP              | US        |      4031 | NS      | $1534682.32   | 0.47%             |  |  |  | No            |                  1 | On Loan: No      |
| Intel Corp                               | Intel Corp                               | CUSIP: 458140100<br>LEI: KNX4USFCNGPY45LOCE31 | Long             | EC               | CORP              | US        |     17952 | NS      | $818790.72    | 0.25%             |  |  |  | No            |                  1 | On Loan: No      |
| PG&E Corp                                | PG&E Corp                                | CUSIP: 69331C108<br>LEI: 8YQ2GSDWYZXO2EDN3511 | Long             | EC               | CORP              | US        |    230496 | NS      | $4379424.00   | 1.35%             |  |  |  | No            |                  1 | On Loan: No      |
| Jacobs Solutions Inc                     | Jacobs Solutions Inc                     | CUSIP: 46982L108<br>LEI: 254900E3KHXCC2C8K272 | Long             | EC               | CORP              | US        |      4419 | NS      | $609203.34    | 0.19%             |  |  |  | No            |                  1 | On Loan: No      |
| Flex Ltd                                 | Flex Ltd                                 | CUSIP: 000000000<br>LEI: 549300EAQH74YHD07T53 | Long             | EC               | CORP              | SG        |     43478 | NS      | $2739983.56   | 0.84%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Institutional Money Market Portfolio | MFS Institutional Money Market Portfolio | CUSIP: 55291X109<br>LEI: 5L2W638H85N8T1136O07 | Long             | EC               | RF                | US        |    751859 | NS      | $751934.06    | 0.23%             |  |  |  | No            |                  1 | On Loan: No      |
| TechnipFMC PLC                           | TechnipFMC PLC                           | CUSIP: 000000000<br>LEI: 549300D5I93QWCJTCK36 | Long             | EC               | CORP              | GB        |     72794 | NS      | $4826970.14   | 1.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Envista Holdings Corp                    | Envista Holdings Corp                    | CUSIP: 29415F104<br>LEI: 549300BX623VURJZ5269 | Long             | EC               | CORP              | US        |     28885 | NS      | $843730.85    | 0.26%             |  |  |  | No            |                  1 | On Loan: No      |
| Goldman Sachs Group Inc/The              | Goldman Sachs Group Inc/The              | CUSIP: 38141G104<br>LEI: 784F5XWPLTWKTBV3E584 | Long             | EC               | CORP              | US        |      4102 | NS      | $3525956.14   | 1.08%             |  |  |  | No            |                  1 | On Loan: No      |
| Ciena Corp                               | Ciena Corp                               | CUSIP: 171779309<br>LEI: W0CZ7N0GH8UIGXDM1H41 | Long             | EC               | CORP              | US        |      2670 | NS      | $931029.00    | 0.29%             |  |  |  | No            |                  1 | On Loan: No      |
| Freeport-McMoRan Inc                     | Freeport-McMoRan Inc                     | CUSIP: 35671D857<br>LEI: 549300IRDTHJQ1PVET45 | Long             | EC               | CORP              | US        |     11180 | NS      | $761134.40    | 0.23%             |  |  |  | No            |                  1 | On Loan: No      |
| Curtiss-Wright Corp                      | Curtiss-Wright Corp                      | CUSIP: 231561101<br>LEI: TEL51ETZWP7D0ZM4X325 | Long             | EC               | CORP              | US        |      1272 | NS      | $890819.76    | 0.27%             |  |  |  | No            |                  1 | On Loan: No      |
| Deere & Co                               | Deere & Co                               | CUSIP: 244199105<br>LEI: PWFTNG3EI0Y73OXWDH08 | Long             | EC               | CORP              | US        |      4152 | NS      | $2614555.92   | 0.80%             |  |  |  | No            |                  1 | On Loan: No      |
| Analog Devices Inc                       | Analog Devices Inc                       | CUSIP: 032654105<br>LEI: GYVOE5EZ4GDAVTU4CQ61 | Long             | EC               | CORP              | US        |      6423 | NS      | $2285239.17   | 0.70%             |  |  |  | No            |                  1 | On Loan: No      |
| Charles Schwab Corp/The                  | Charles Schwab Corp/The                  | CUSIP: 808513105<br>LEI: 549300VSGCJ7E698NM85 | Long             | EC               | CORP              | US        |     18948 | NS      | $1803849.60   | 0.55%             |  |  |  | No            |                  1 | On Loan: No      |
| Duke Energy Corp                         | Duke Energy Corp                         | CUSIP: 26441C204<br>LEI: I1BZKREC126H0VB1BL91 | Long             | EC               | CORP              | US        |     18287 | NS      | $2392853.95   | 0.74%             |  |  |  | No            |                  1 | On Loan: No      |
| Meta Platforms Inc                       | Meta Platforms Inc                       | CUSIP: 30303M102<br>LEI: BQ4BKCS1HXDV9HN80Z93 | Long             | EC               | CORP              | US        |      8453 | NS      | $5479065.54   | 1.69%             |  |  |  | No            |                  1 | On Loan: No      |
| Pfizer Inc                               | Pfizer Inc                               | CUSIP: 717081103<br>LEI: 765LHXWGK1KXCLTFYQ30 | Long             | EC               | CORP              | US        |    185235 | NS      | $5121747.75   | 1.58%             |  |  |  | No            |                  1 | On Loan: No      |
| RTX Corp                                 | RTX Corp                                 | CUSIP: 75513E101<br>LEI: I07WOS4YJ0N7YRFE7309 | Long             | EC               | CORP              | US        |      3350 | NS      | $678777.00    | 0.21%             |  |  |  | No            |                  1 | On Loan: No      |
| Voya Financial Inc                       | Voya Financial Inc                       | CUSIP: 929089100<br>LEI: 549300T065Z4KJ686G75 | Long             | EC               | CORP              | US        |     12156 | NS      | $812993.28    | 0.25%             |  |  |  | No            |                  1 | On Loan: No      |
| Altria Group Inc                         | Altria Group Inc                         | CUSIP: 02209S103<br>LEI: XSGZFLO9YTNO9VCQV219 | Long             | EC               | CORP              | US        |     34425 | NS      | $2376702.00   | 0.73%             |  |  |  | No            |                  1 | On Loan: No      |
| JB Hunt Transport Services Inc           | JB Hunt Transport Services Inc           | CUSIP: 445658107<br>LEI: 549300XCD1MPI1C5GK90 | Long             | EC               | CORP              | US        |      3320 | NS      | $774921.20    | 0.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Simon Property Group Inc                 | Simon Property Group Inc                 | CUSIP: 828806109<br>LEI: 529900GQL5X8H7AO3T64 | Long             | EC               | CORP              | US        |      5068 | NS      | $1033111.80   | 0.32%             |  |  |  | No            |                  1 | On Loan: No      |
| Zoom Communications Inc                  | Zoom Communications Inc                  | CUSIP: 98980L101<br>LEI: 549300T9GCHU0ODOM055 | Long             | EC               | CORP              | US        |     13652 | NS      | $1009428.88   | 0.31%             |  |  |  | No            |                  1 | On Loan: No      |
| Ferguson Enterprises Inc                 | Ferguson Enterprises Inc                 | CUSIP: 31488V107<br>LEI: 2138003JYQMRP3SLX189 | Long             | EC               | CORP              | US        |      8583 | NS      | $2238103.08   | 0.69%             |  |  |  | No            |                  1 | On Loan: No      |
| Caterpillar Inc                          | Caterpillar Inc                          | CUSIP: 149123101<br>LEI: WRJR7GS4GTRECRRTVX92 | Long             | EC               | CORP              | US        |      9386 | NS      | $6972202.38   | 2.14%             |  |  |  | No            |                  1 | On Loan: No      |
| QUALCOMM Inc                             | QUALCOMM Inc                             | CUSIP: 747525103<br>LEI: H1J8DDZKZP6H7RWC0H53 | Long             | EC               | CORP              | US        |      9057 | NS      | $1289354.52   | 0.40%             |  |  |  | No            |                  1 | On Loan: No      |
| Ameriprise Financial Inc                 | Ameriprise Financial Inc                 | CUSIP: 03076C106<br>LEI: 6ZLKQF7QB6JAEKQS5388 | Long             | EC               | CORP              | US        |      6613 | NS      | $3108903.56   | 0.96%             |  |  |  | No            |                  1 | On Loan: No      |
| KLA Corp                                 | KLA Corp                                 | CUSIP: 482480100<br>LEI: 549300H0BF5JCG96TJ81 | Long             | EC               | CORP              | US        |      1415 | NS      | $2157238.25   | 0.66%             |  |  |  | No            |                  1 | On Loan: No      |
| AES Corp/The                             | AES Corp                                 | CUSIP: 00130H105<br>LEI: 2NUNNB7D43COUIRE5295 | Long             | EC               | CORP              | US        |    103599 | NS      | $1790190.72   | 0.55%             |  |  |  | No            |                  1 | On Loan: No      |
| Hartford Insurance Group Inc/The         | Hartford Insurance Group Inc/The         | CUSIP: 416515104<br>LEI: IU7C3FTM7Y3BQM112U94 | Long             | EC               | CORP              | US        |     13703 | NS      | $1929793.49   | 0.59%             |  |  |  | No            |                  1 | On Loan: No      |
| Electronic Arts Inc                      | Electronic Arts Inc                      | CUSIP: 285512109<br>LEI: 549300O7A67PUEYKDL45 | Long             | EC               | CORP              | US        |     11050 | NS      | $2216298.50   | 0.68%             |  |  |  | No            |                  1 | On Loan: No      |
| McKesson Corp                            | McKesson Corp                            | CUSIP: 58155Q103<br>LEI: 549300WZWOM80UCFSF54 | Long             | EC               | CORP              | US        |      3285 | NS      | $3243510.45   | 1.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Humana Inc                               | Humana Inc                               | CUSIP: 444859102<br>LEI: 529900YLDW34GJAO4J06 | Long             | EC               | CORP              | US        |      8940 | NS      | $1703427.60   | 0.52%             |  |  |  | No            |                  1 | On Loan: No      |
| RPM International Inc                    | RPM International Inc                    | CUSIP: 749685103<br>LEI: 549300TJCKW4BRXPJ474 | Long             | EC               | CORP              | US        |     11700 | NS      | $1335204.00   | 0.41%             |  |  |  | No            |                  1 | On Loan: No      |
| Kimberly-Clark Corp                      | Kimberly-Clark Corp                      | CUSIP: 494368103<br>LEI: MP3J6QPYPGN75NVW2S34 | Long             | EC               | CORP              | US        |     24516 | NS      | $2732063.04   | 0.84%             |  |  |  | No            |                  1 | On Loan: No      |
| Booking Holdings Inc                     | Booking Holdings Inc                     | CUSIP: 09857L108<br>LEI: FXM8FAOHMYDIPD38UZ17 | Long             | EC               | CORP              | US        |       397 | NS      | $1683021.95   | 0.52%             |  |  |  | No            |                  1 | On Loan: No      |
| Cousins Properties Inc                   | Cousins Properties Inc                   | CUSIP: 222795502<br>LEI: 5493007XPYD5EJABN062 | Long             | EC               | CORP              | US        |    105738 | NS      | $2448892.08   | 0.75%             |  |  |  | No            |                  1 | On Loan: No      |
| Colgate-Palmolive Co                     | Colgate-Palmolive Co                     | CUSIP: 194162103<br>LEI: YMEGZFW4SBUSS5BQXF88 | Long             | EC               | CORP              | US        |     42294 | NS      | $4193027.16   | 1.29%             |  |  |  | No            |                  1 | On Loan: No      |
| CRH PLC                                  | CRH PLC                                  | CUSIP: 000000000<br>LEI: 549300MIDJNNTH068E74 | Long             | EC               | CORP              | IE        |     30448 | NS      | $3653151.04   | 1.12%             |  |  |  | No            |                  1 | On Loan: No      |
| JPMorgan Chase & Co                      | JPMorgan Chase & Co                      | CUSIP: 46625H100<br>LEI: 8I5DZWZKVSZI1NUHU748 | Long             | EC               | CORP              | US        |     14699 | NS      | $4414109.70   | 1.36%             |  |  |  | No            |                  1 | On Loan: No      |
| Amazon.com Inc                           | Amazon.com Inc                           | CUSIP: 023135106<br>LEI: ZXTILKJKG63JELOEG630 | Long             | EC               | CORP              | US        |     31107 | NS      | $6532470.00   | 2.01%             |  |  |  | No            |                  1 | On Loan: No      |
| Westinghouse Air Brake Technologies Corp | Westinghouse Air Brake Technologies Corp | CUSIP: 929740108<br>LEI: 06BTX5UWZD0GQ5N5Y745 | Long             | EC               | CORP              | US        |     19848 | NS      | $5238879.60   | 1.61%             |  |  |  | No            |                  1 | On Loan: No      |
| Bristol-Myers Squibb Co                  | Bristol-Myers Squibb Co                  | CUSIP: 110122108<br>LEI: HLYYNH7UQUORYSJQCN42 | Long             | EC               | CORP              | US        |     41672 | NS      | $2599082.64   | 0.80%             |  |  |  | No            |                  1 | On Loan: No      |
| American Express Co                      | American Express Co                      | CUSIP: 025816109<br>LEI: R4PP93JZOLY261QX3811 | Long             | EC               | CORP              | US        |      9240 | NS      | $2854236.00   | 0.88%             |  |  |  | No            |                  1 | On Loan: No      |
| American International Group Inc         | American International Group Inc         | CUSIP: 026874784<br>LEI: ODVCVCQG2BP6VHV36M30 | Long             | EC               | CORP              | US        |     30526 | NS      | $2457037.74   | 0.76%             |  |  |  | No            |                  1 | On Loan: No      |
| Eaton Corp PLC                           | Eaton Corp PLC                           | CUSIP: 000000000<br>LEI: 549300VDIGTMXUNT7H71 | Long             | EC               | CORP              | IE        |     12184 | NS      | $4580209.28   | 1.41%             |  |  |  | No            |                  1 | On Loan: No      |
| Gilead Sciences Inc                      | Gilead Sciences Inc                      | CUSIP: 375558103<br>LEI: 549300WTZWR07K8MNV44 | Long             | EC               | CORP              | US        |     30581 | NS      | $4555039.95   | 1.40%             |  |  |  | No            |                  1 | On Loan: No      |
| ConocoPhillips                           | ConocoPhillips                           | CUSIP: 20825C104<br>LEI: WPTL2Z3FIYTHSP5V2253 | Long             | EC               | CORP              | US        |     29555 | NS      | $3353310.30   | 1.03%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2026-03-27

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

**Signature:** James Byrne

**Name of Signer:** James Byrne

**Title:** Assistant Treasurer