# EDGAR Filing Document

**Accession Number:** 0000356349
**File Stem:** 0000912938-23-000229
**Filing Date:** 2023-2
**Character Count:** 3932
**Document Hash:** 9a0dc1dfaaec8b1757ff0a8ebc4dae38
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000912938-23-000229.hdr.sgml**: 20230209

**ACCESSION NUMBER**: 0000912938-23-000229

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20230209

**DATE AS OF CHANGE**: 20230209

**EFFECTIVENESS DATE**: 20230209

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MFS SERIES TRUST XIII
- **CENTRAL INDEX KEY:** 0000356349
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-74959
- **FILM NUMBER:** 23601373

**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 SECURITIES FUND
- **DATE OF NAME CHANGE:** 19930408

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MFS GOVERNMENT GUARANTEED SECURITIES TRUST
- **DATE OF NAME CHANGE:** 19910522

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** WORKING CAPITAL TRUST
- **DATE OF NAME CHANGE:** 19840529

## Series and Classes Contracts Data

### MFS Diversified Income Fund (Series ID: S000012219)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| A          | DIFAX         | C000033358 |
| C          | DIFCX         | C000033359 |
| I          | DIFIX         | C000033360 |
| R1         | DIFDX         | C000068409 |
| R2         | DIFEX         | C000068410 |
| R3         | DIFFX         | C000068411 |
| R4         | DIFGX         | C000068412 |
| R6         | DIFHX         | C000117928 |

---

## Series and Classes Contracts Data

### MFS Diversified Income Fund (Series ID: S000012219)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000033358 | A            | DIFAX           |
| C000033359 | C            | DIFCX           |
| C000033360 | I            | DIFIX           |
| C000068409 | R1           | DIFDX           |
| C000068410 | R2           | DIFEX           |
| C000068411 | R3           | DIFFX           |
| C000068412 | R4           | DIFGX           |
| C000117928 | R6           | DIFHX           |

![](image0.jpg)

SUPPLEMENT TO THE PROSPECTUS

*Supplement dated February 9, 2023, to the Prospectus dated June 28, 2022.*

MFS<sup>®</sup> Diversified Income Fund

------

**Effective immediately, the following is added after the tables in the sections entitled "Portfolio Manager(s)" under the main headings entitled "Summary of Key Information" and "Management of the Fund":**

Effective April 30, 2024, Matt Ryan will no longer be a portfolio manager of the fund.

1050242&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; DIF-SUP-I-020923

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