# EDGAR Filing Document

**Accession Number:** 0000063068
**File Stem:** 0001741773-25-002692
**Filing Date:** 2025-7
**Character Count:** 3014
**Document Hash:** e6f9deb133811c6286b7cfcfb068b76d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001741773-25-002692.hdr.sgml**: 20250711

**ACCESSION NUMBER**: 0001741773-25-002692

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20250711

**DATE AS OF CHANGE**: 20250711

**EFFECTIVENESS DATE**: 20250711

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MFS SERIES TRUST IV
- **CENTRAL INDEX KEY:** 0000063068

**ORGANIZATION NAME:**
- **EIN:** 046382595
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1031

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-54607
- **FILM NUMBER:** 251117621

**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 MUNICIPAL BOND FUND /MA/
- **DATE OF NAME CHANGE:** 19930910

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MASSACHUSETTS CASH MANAGEMENT TRUST
- **DATE OF NAME CHANGE:** 19920703

## Series and Classes Contracts Data

### MFS U.S. Government Money Market Fund (Series ID: S000002435)

---

|  |  |  |
|:---|:---|:---|
| Class Name                           | Ticker Symbol | Class ID   |
| MFS U.S.Government Money Market Fund | MCMXX         | C000006517 |

---

## Series and Classes Contracts Data

### MFS U.S. Government Money Market Fund (Series ID: S000002435)

| Class ID   | Class Name                           | Ticker Symbol   |
|:---|:---|:---|
| C000006517 | MFS U.S.Government Money Market Fund | MCMXX           |

![](img_0d8057eee4924f1.jpg)

SUPPLEMENT TO THE PROSPECTUS

*Supplement dated July 11, 2025, to the Prospectus dated December 27, 2024.*

## MFS <sup>®</sup> U.S. Government Money Market Fund

#### Effective immediately, the following is added after the first paragraph under the main heading entitled "How To Purchase, Redeem, and Exchange Shares":
With respect to transactions and positions held in shares of the fund through an Edward Jones platform or an account maintained at an omnibus level by Edward Jones with the fund (each an Edward Jones account), the following minimum purchase amounts and minimum balances apply:

**Minimum Purchase Amounts.** Purchases by shareholders in an Edward Jones account will be subject to a $250 initial purchase minimum and no subsequent purchase minimum.

**Minimum Balances.** Edward Jones has the right to sell at its discretion fund holdings in an Edward Jones account with a balance of $250 or less. The following are examples of Edward Jones accounts which are not subject to this minimum balance policy: (1) a fee-based account held on an Edward Jones platform; (2) a 529 account held on an Edward Jones platform; or (3) an account with an active systematic investment plan or Letter of Intent with Edward Jones.

MMM-SUP-I-071125

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