# EDGAR Filing Document

**Accession Number:** 0000783740
**File Stem:** 0001752724-23-009186
**Filing Date:** 2023-1
**Character Count:** 7497
**Document Hash:** 61be0466e2a934eb654d44310178bf05
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-23-009186.hdr.sgml**: 20230124

**ACCESSION NUMBER**: 0001752724-23-009186

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20221130

**FILED AS OF DATE**: 20230124

**DATE AS OF CHANGE**: 20230124

**PERIOD START**: 20230531

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MFS SERIES TRUST X
- **CENTRAL INDEX KEY:** 0000783740
- **IRS NUMBER:** 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:** 23546041

**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 International Diversification Fund (Series ID: S000002515)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000006924 | A            | MDIDX           |
| C000006925 | R4           | MDITX           |
| C000006929 | B            | MDIFX           |
| C000006930 | C            | MDIGX           |
| C000006931 | I            | MDIJX           |
| C000006933 | R1           | MDIOX           |
| C000006935 | R2           | MDIKX           |
| C000006936 | R3           | MDIHX           |
| C000195683 | R6           | MDIZX           |

## 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 International Diversification Fund

- **b. EDGAR series identifier (if any):** S000002515

- **c. LEI of Series:** 5FYSVBMHKU2K1O39U714

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

- **a. Date of fiscal year-end:** 2023-05-31

- **b. Date as of which information is reported:** 2022-11-30

**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:** $33155040532.86

**Total Liabilities:** $34286006.47

**Net Assets:** $33120754526.39

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000006931 | -9.18%               | 2.98%                | 13.57%               |
| Class ID C000195683 | -9.17%               | 2.98%                | 13.55%               |
| Class ID C000006930 | -9.26%               | 2.94%                | 13.45%               |
| Class ID C000006933 | -9.26%               | 2.93%                | 13.45%               |
| Class ID C000006936 | -9.17%               | 2.99%                | 13.48%               |
| Class ID C000006935 | -9.22%               | 2.97%                | 13.46%               |
| Class ID C000006929 | -9.27%               | 2.95%                | 13.40%               |
| Class ID C000006924 | -9.20%               | 2.97%                | 13.53%               |
| Class ID C000006925 | -9.16%               | 2.99%                | 13.56%               |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-142754738.73           | $-2768887759.87                            |
| Month 2  | $-104373411.99           | $967890225.06                              |
| Month 3  | $-52598111.42            | $4011942797.61                             |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| MFS Research International Fund          | MFS Research International Fund          | CUSIP: 55273H361<br>LEI: UH91KW1VFNZQF5FY7237 | Long             | EC               | RF                | US        | 444229091 | NS      | $9088927192.67 | 27.44%            |  |  |  | No            |                  1 | On Loan: No      |
| MFS Emerging Markets Equity Fund         | MFS Emerging Markets Equity Fund         | CUSIP: 552746331<br>LEI: GLINMRWNKCBOHYKQ2131 | Long             | EC               | RF                | US        | 192591487 | NS      | $5806633319.42 | 17.53%            |  |  |  | No            |                  1 | On Loan: No      |
| MFS International New Discovery Fund     | MFS International New Discovery Fund     | CUSIP: 552981383<br>LEI: RC53GXLQZ5LVIZBRHR66 | Long             | EC               | RF                | US        | 105710661 | NS      | $3288658653.85 | 9.93%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS International Intrinsic Value Fund   | MFS International Intrinsic Value Fund   | CUSIP: 552746349<br>LEI: 7540QFSKYNTDFH7HAK24 | Long             | EC               | RF                | US        | 116857277 | NS      | $4940725652.41 | 14.92%            |  |  |  | No            |                  1 | On Loan: No      |
| MFS Institutional Money Market Portfolio | MFS Institutional Money Market Portfolio | CUSIP: 55291X109<br>LEI: 5L2W638H85N8T1136O07 | Long             | STIV             | RF                | US        |  53624606 | NS      | $53624605.66   | 0.16%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS International Large Cap Value Fund   | MFS International Large Cap Value Fund   | CUSIP: 552743445<br>LEI: 549300YEW2NKJCMQAR75 | Long             | EC               | RF                | US        | 403487079 | NS      | $4954821326.66 | 14.96%            |  |  |  | No            |                  1 | On Loan: No      |
| MFS International Growth Fund            | MFS International Growth Fund            | CUSIP: 552746356<br>LEI: PTNAY8DC4VJYOKVJ5B83 | Long             | EC               | RF                | US        | 129268881 | NS      | $4966510418.93 | 15.00%            |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2022-12-14

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

**Signature:** Kasey Phillips

**Name of Signer:** Kasey Phillips

**Title:** Assistant Treasurer