# EDGAR Filing Document

**Accession Number:** 0001330967
**File Stem:** 0001752724-25-152203
**Filing Date:** 2025-6
**Character Count:** 14079
**Document Hash:** c5f9b7bc2e04ed55d3e22542daae8285
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-25-152203.hdr.sgml**: 20250624

**ACCESSION NUMBER**: 0001752724-25-152203

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250430

**FILED AS OF DATE**: 20250624

**DATE AS OF CHANGE**: 20250624

**PERIOD START**: 20250430

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MFS SERIES TRUST XII
- **CENTRAL INDEX KEY:** 0001330967

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0430

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-21780
- **FILM NUMBER:** 251066834

**BUSINESS ADDRESS:**
- **STREET 1:** 111 HUNTINGTON AVENUE
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199
- **BUSINESS PHONE:** 617-954-5000

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

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MFS Series Trust XII
- **DATE OF NAME CHANGE:** 20050622

## Series and Classes Contracts Data

### MFS Lifetime Income Fund (Series ID: S000002501)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000006793 | A            | MLLAX           |
| C000006794 | B            | MLLBX           |
| C000006795 | C            | MLLCX           |
| C000006796 | I            | MLLIX           |
| C000006797 | R1           | MLLEX           |
| C000006799 | R2           | MLLGX           |
| C000006800 | R3           | MLLHX           |
| C000006801 | R4           | MLLJX           |
| C000173225 | R6           | MLLKX           |

## 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 XII

- **b. Investment Company Act file number:** 811-21780

- **c. CIK number of Registrant:** 0001330967

- **d. LEI of Registrant:** 549300VVIIPRJRW6FR46

- **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 Lifetime Income Fund

- **b. EDGAR series identifier (if any):** S000002501

- **c. LEI of Series:** HVSHYLXT64G65WN2P306

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

- **a. Date of fiscal year-end:** 2025-04-30

- **b. Date as of which information is reported:** 2025-04-30

**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:** $554430647.35

**Total Liabilities:** $1683282.61

**Net Assets:** $552747364.74

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000006794 | 0.67%                | -0.88%               | 0.10%                |
| Class ID C000173225 | 0.77%                | -0.78%               | 0.19%                |
| Class ID C000006799 | 0.72%                | -0.84%               | 0.14%                |
| Class ID C000006793 | 0.74%                | -0.81%               | 0.16%                |
| Class ID C000006797 | 0.67%                | -0.87%               | 0.10%                |
| Class ID C000006795 | 0.67%                | -0.88%               | 0.10%                |
| Class ID C000006801 | 0.84%                | -0.88%               | 0.19%                |
| Class ID C000006796 | 0.84%                | -0.87%               | 0.19%                |
| Class ID C000006800 | 0.74%                | -0.81%               | 0.16%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-734825.90              | $3886699.45                                |
| Month 2  | $-414422.26              | $-5804093.77                               |
| Month 3  | $-1342475.99             | $663874.73                                 |

### 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 Government Securities Fund                 | MFS Government Securities Fund                 | CUSIP: 552982712<br>LEI: UWWK6TDSOPDQSQMMEB12 | Long             | EC               | RF                | US        |   6047238 | NS      | $52369085.25  | 9.47%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Emerging Markets Debt Fund                 | MFS Emerging Markets Debt Fund                 | CUSIP: 552746364<br>LEI: 509D6AOZZ4SJ08T5BZ82 | Long             | EC               | RF                | US        |    463139 | NS      | $5506720.78   | 1.00%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Research International Fund                | MFS Research International Fund                | CUSIP: 55273H361<br>LEI: UH91KW1VFNZQF5FY7237 | Long             | EC               | RF                | US        |    351796 | NS      | $8467717.64   | 1.53%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Blended Research Core Equity Fund          | MFS Blended Research Core Equity Fund          | CUSIP: 55273W483<br>LEI: SQK3NYUBFBKJ3GF1IO09 | Long             | EC               | RF                | US        |    265190 | NS      | $9096022.93   | 1.65%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Growth Fund                                | MFS Growth Fund                                | CUSIP: 552985673<br>LEI: K4ZYIH3WSXKUSPKIPM59 | Long             | EC               | RF                | US        |     48676 | NS      | $9150042.67   | 1.66%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS New Discovery Value Fund                   | MFS New Discovery Value Fund                   | CUSIP: 552982696<br>LEI: LRMRW30Z8FYTIFW1W860 | Long             | EC               | RF                | US        |    167427 | NS      | $2745809.10   | 0.50%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Blended Research Value Equity Fund         | MFS Blended Research Value Equity Fund         | CUSIP: 552746133<br>LEI: 549300QL66OEPI6JSE90 | Long             | EC               | RF                | US        |    733478 | NS      | $11156193.79  | 2.02%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS High Income Fund                           | MFS High Income Fund                           | CUSIP: 552984684<br>LEI: DMVGFZCV67YA34LSI126 | Long             | EC               | RF                | US        |   3607892 | NS      | $11004070.17  | 1.99%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Blended Research Small Cap Equity Fund     | MFS Blended Research Small Cap Equity Fund     | CUSIP: 552743684<br>LEI: 549300R0MISDFKQQMH05 | Long             | EC               | RF                | US        |    428940 | NS      | $5516163.68   | 1.00%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS International Intrinsic Value Fund         | MFS International Intrinsic Value Fund         | CUSIP: 552746349<br>LEI: 7540QFSKYNTDFH7HAK24 | Long             | EC               | RF                | US        |     70580 | NS      | $2816144.75   | 0.51%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Mid Cap Growth Fund                        | MFS Mid Cap Growth Fund                        | CUSIP: 552987554<br>LEI: XPX0WXKIO6CLKBLYF666 | Long             | EC               | RF                | US        |    280568 | NS      | $8489997.12   | 1.54%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Global Real Estate Fund                    | MFS Global Real Estate Fund                    | CUSIP: 552982720<br>LEI: ROYDM6SL56ZXYAENS860 | Long             | EC               | RF                | US        |    700048 | NS      | $11207773.56  | 2.03%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Blended Research Mid Cap Equity Fund       | MFS Blended Research Mid Cap Equity Fund       | CUSIP: 552743551<br>LEI: 549300CJNZTXTE7DBK33 | Long             | EC               | RF                | US        |   1253321 | NS      | $16706762.80  | 3.02%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS New Discovery Fund                         | MFS New Discovery Fund                         | CUSIP: 55273H346<br>LEI: ZVEMRLDGMDO1D1VDSU87 | Long             | EC               | RF                | US        |     97359 | NS      | $2817565.15   | 0.51%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Institutional Money Market Portfolio       | MFS Institutional Money Market Portfolio       | CUSIP: 55291X109<br>LEI: 5L2W638H85N8T1136O07 | Long             | EC               | RF                | US        |  13526282 | NS      | $13526282.28  | 2.45%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Blended Research Growth Equity Fund        | MFS Blended Research Growth Equity Fund        | CUSIP: 552743783<br>LEI: 549300M0GLI3GVVPMM34 | Long             | EC               | RF                | US        |    399004 | NS      | $9149164.01   | 1.66%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Research Fund                              | MFS Research Fund                              | CUSIP: 552981391<br>LEI: XFPOOG2XVG5TW1LZ8588 | Long             | EC               | RF                | US        |    168159 | NS      | $9105803.41   | 1.65%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Research Bond Fund                         | MFS Research Bond Fund                         | CUSIP: 55274K603<br>LEI: FJAEEQMSDDUK9QL2E558 | Long             | EC               | RF                | US        |  11279642 | NS      | $107382192.26 | 19.43%            |  |  |  | No            |                  1 | On Loan: No      |
| MFS Global Opportunistic Bond Fund             | MFS Global Opportunistic Bond Fund             | CUSIP: 552743882<br>LEI: XE280U8NKIY4V6K1JN70 | Long             | EC               | RF                | US        |   4723379 | NS      | $38590008.43  | 6.98%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Value Fund                                 | MFS Value Fund                                 | CUSIP: 55273H353<br>LEI: HV6C0RMURVKFUQ3UTB42 | Long             | EC               | RF                | US        |    229260 | NS      | $11162655.62  | 2.02%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Inflation Adjusted Bond Fund               | MFS Inflation Adjusted Bond Fund               | CUSIP: 55274K884<br>LEI: VOHO802M9IKG3IZTEN75 | Long             | EC               | RF                | US        |   5987535 | NS      | $55264944.33  | 10.00%            |  |  |  | No            |                  1 | On Loan: No      |
| MFS Commodity Strategy Fund                    | MFS Commodity Strategy Fund                    | CUSIP: 55276T826<br>LEI: T0OEQ8I3F6DXUJCOV412 | Long             | EC               | RF                | US        |   2954848 | NS      | $10844293.73  | 1.96%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Blended Research International Equity Fund | MFS Blended Research International Equity Fund | CUSIP: 552987448<br>LEI: 254900SJDP6D81SAVM86 | Long             | EC               | RF                | US        |    990932 | NS      | $14130692.09  | 2.56%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Ltd Maturity Fund                          | MFS Ltd Maturity Fund                          | CUSIP: 55274K801<br>LEI: 7ER38PJ2TK60L3Y32478 | Long             | EC               | RF                | US        |  18694769 | NS      | $109925238.95 | 19.89%            |  |  |  | No            |                  1 | On Loan: No      |
| MFS Mid Cap Value Fund                         | MFS Mid Cap Value Fund                         | CUSIP: 55273W475<br>LEI: BXHSCSBXYY1DOHP6E209 | Long             | EC               | RF                | US        |    278994 | NS      | $8300066.62   | 1.50%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS Emerging Markets Debt Local Currency Fund  | MFS Emerging Markets Debt Local Currency Fund  | CUSIP: 552746323<br>LEI: 5493001KPK8UJ27DMD68 | Long             | EC               | RF                | US        |    997822 | NS      | $5547890.45   | 1.00%             |  |  |  | No            |                  1 | On Loan: No      |
| MFS International Growth Fund                  | MFS International Growth Fund                  | CUSIP: 552746356<br>LEI: PTNAY8DC4VJYOKVJ5B83 | Long             | EC               | RF                | US        |     62990 | NS      | $2822587.86   | 0.51%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2025-05-15

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

**Signature:** James Byrne

**Name of Signer:** James Byrne

**Title:** Assistant Treasurer