# EDGAR Filing Document

**Accession Number:** 0000356349
**File Stem:** 0000912938-23-000024
**Filing Date:** 2023-1
**Character Count:** 9681
**Document Hash:** 6be3d5e6c0a7a821cdef00fa3caf4813
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000912938-23-000024.hdr.sgml**: 20230124

**ACCESSION NUMBER**: 0000912938-23-000024

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20230124

**DATE AS OF CHANGE**: 20230124

**EFFECTIVENESS DATE**: 20230124

**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:** 23545941

**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 January 24, 2023, to the Prospectus dated June 28, 2022.*

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

------

#### Effective immediately, the sub-section entitled "Portfolio Manager(s)" under the main heading entitled "Summary of Key Information" is restated in its entirety as follows:

#### Portfolio Manager(s)

---

| | | |
|:---|:---|:---|
| **&nbsp;&nbsp;&nbsp;&nbsp;Portfolio Manager** | &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; **Since** | &nbsp;&nbsp;&nbsp; **Title** |
| &nbsp;&nbsp; Robert Almeida | &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; 2018 | &nbsp;&nbsp;&nbsp; Investment Officer of MFS |
| &nbsp;&nbsp; Neeraj Arora | &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; 2019 | &nbsp;&nbsp;&nbsp; Investment Officer of MFS |
| &nbsp;&nbsp; David Cole | &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; 2006 | &nbsp;&nbsp;&nbsp; Investment Officer of MFS |
| &nbsp;&nbsp; Rick Gable | &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; 2006 | &nbsp;&nbsp;&nbsp; Investment Officer of MFS |
| &nbsp;&nbsp; Alexander Mackey | &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; 2021 | &nbsp;&nbsp;&nbsp; Investment Officer of MFS |
| &nbsp;&nbsp; John Mitchell | &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; January 20, 2023 | &nbsp;&nbsp;&nbsp; Investment Officer of MFS |
| &nbsp;&nbsp; Matt Ryan | &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; 2006 | &nbsp;&nbsp;&nbsp; Investment Officer of MFS |
| &nbsp;&nbsp; Jonathan Sage | &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; 2006 | &nbsp;&nbsp;&nbsp; Investment Officer of MFS |
| &nbsp;&nbsp; Geoffrey Schechter | &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; 2006 | &nbsp;&nbsp;&nbsp; Investment Officer of MFS |
| &nbsp;&nbsp; Michael Skatrud | &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; 2018 | &nbsp;&nbsp;&nbsp; Investment Officer of MFS |

---

#### <br>

#### Effective immediately, the sub-section entitled "Portfolio Manager(s)" under the main heading entitled "Management of the Fund" is restated in its entirety as follows:

#### Portfolio Manager(s)
Information regarding the portfolio manager(s) of the fund is set forth below. Further information regarding the portfolio manager(s), including other accounts managed, compensation, ownership of fund shares, and possible conflicts of interest, is available in the fund's SAI.

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp; **Portfolio Manager** | &nbsp;&nbsp; **Primary Role** | &nbsp;&nbsp; **Five Year History** |
| &nbsp;&nbsp; Robert Almeida | &nbsp;&nbsp; Lead Portfolio Manager | &nbsp;&nbsp; Employed in the investment area of MFS since 2007 |
| &nbsp;&nbsp; Neeraj Arora | &nbsp;&nbsp; Emerging Markets Debt Instruments Portfolio Manager | &nbsp;&nbsp; Employed in the investment area of MFS since 2011 |
| &nbsp;&nbsp; David Cole | &nbsp;&nbsp; Below Investment Grade Debt Instruments Portfolio Manager | &nbsp;&nbsp; Employed in the investment area of MFS since 2004 |
| &nbsp;&nbsp; Rick Gable | &nbsp;&nbsp; Real Estate Related Investments Portfolio Manager | &nbsp;&nbsp; Employed in the investment area of MFS since 2011 |
| &nbsp;&nbsp; Alexander Mackey | &nbsp;&nbsp; Investment Grade Debt Instruments Portfolio Manager | &nbsp;&nbsp; Employed in the investment area of MFS since 2001 |
| &nbsp;&nbsp; John Mitchell | &nbsp;&nbsp; Investment Grade Debt Instruments Portfolio Manager | &nbsp;&nbsp; Employed in the investment area of MFS since 2003 |
| &nbsp;&nbsp; Matt Ryan | &nbsp;&nbsp; Emerging Markets Debt Instruments Portfolio Manager | &nbsp;&nbsp; Employed in the investment area of MFS since 1997 |
| &nbsp;&nbsp; Jonathan Sage | &nbsp;&nbsp; Equity Securities Portfolio Manager | &nbsp;&nbsp; Employed in the investment area of MFS since 2000 |
| &nbsp;&nbsp; Geoffrey Schechter | &nbsp;&nbsp; U.S. Government Securities Portfolio Manager | &nbsp;&nbsp; Employed in the investment area of MFS since 1993 |
| &nbsp;&nbsp; Michael Skatrud | &nbsp;&nbsp; Below Investment Grade Debt Instruments Portfolio Manager | &nbsp;&nbsp; Employed in the investment area of MFS since 2013 |

---

1050287 &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;&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;&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-012423