# EDGAR Filing Document

**Accession Number:** 0000063068
**File Stem:** 0000912938-25-000290
**Filing Date:** 2025-12
**Character Count:** 3842
**Document Hash:** bcbe75c491119d122841557645489572
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000912938-25-000290.hdr.sgml**: 20251216

**ACCESSION NUMBER**: 0000912938-25-000290

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20251216

**DATE AS OF CHANGE**: 20251216

**EFFECTIVENESS DATE**: 20251216

**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:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-54607
- **FILM NUMBER:** 251573463

**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 Blended Research International Equity Fund (Series ID: S000050657)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000160011 | A            | BRXAX           |
| C000160012 | B            | BRXBX           |
| C000160013 | C            | BRXCX           |
| C000160014 | I            | BRXIX           |
| C000160015 | R1           | BRXRX           |
| C000160016 | R2           | BRXSX           |
| C000160017 | R3           | BRXTX           |
| C000160018 | R4           | BRXUX           |
| C000160019 | R6           | BRXVX           |

![](img_3b5d12876cd24f1.jpg)

SUPPLEMENT TO THE SUMMARY PROSPECTUS

*The date of this supplement is December 16, 2025.*

---

| | |
|:---|:---|
| MFS<sup>®</sup> BLENDED RESEARCH<sup>®</sup> CORE EQUITY FUND | MFS<sup>®</sup> BLENDED RESEARCH<sup>®</sup> MID CAP EQUITY FUND |
| MFS<sup>®</sup> BLENDED RESEARCH<sup>®</sup> CORE EQUITY PORTFOLIO | MFS<sup>®</sup> BLENDED RESEARCH<sup>®</sup> SMALL CAP EQUITY FUND |
| MFS<sup>®</sup> BLENDED RESEARCH<sup>®</sup> CORE EQUITY ETF | MFS<sup>®</sup> BLENDED RESEARCH<sup>®</sup> SMALL CAP EQUITY PORTFOLIO |
| MFS<sup>®</sup> BLENDED RESEARCH<sup>®</sup> EMERGING MARKETS EQUITY ETF | MFS<sup>®</sup> BLENDED RESEARCH<sup>®</sup> VALUE EQUITY FUND |
| MFS<sup>®</sup> BLENDED RESEARCH<sup>®</sup> EMERGING MARKETS EQUITY FUND | MFS<sup>®</sup> EQUITY INCOME FUND |
| MFS<sup>®</sup> BLENDED RESEARCH<sup>®</sup> GROWTH EQUITY FUND | MFS<sup>®</sup> LOW VOLATILITY EQUITY FUND |
| MFS<sup>®</sup> BLENDED RESEARCH<sup>®</sup> INTERNATIONAL EQUITY ETF | MFS<sup>®</sup> LOW VOLATILITY GLOBAL EQUITY FUND |
| MFS<sup>®</sup> BLENDED RESEARCH<sup>®</sup> INTERNATIONAL EQUITY FUND |  |

---

**Effective January 1, 2026, the following is added to the table in the sub-section entitled "Portfolio Manager(s)" under the main heading entitled "Summary of Key Information":**

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;**Portfolio Manager** | &nbsp;&nbsp;&nbsp;**Since** | &nbsp;&nbsp;&nbsp;**Title** |
| &nbsp;&nbsp;&nbsp;Nathan Bryant | &nbsp;&nbsp;&nbsp;January 2026 | &nbsp;&nbsp;&nbsp;Investment Officer of MFS |
| &nbsp;&nbsp;&nbsp;Jenney Zhang | &nbsp;&nbsp;&nbsp;January 2026 | &nbsp;&nbsp;&nbsp;Investment Officer of MFS |

---

#### Effective immediately, the following is added after the table in the sub-section entitled "Portfolio Manager(s)" under the main heading entitled "Summary of Key Information":
Matt Krummell has announced his intention to retire effective April 7, 2027, and he will no longer be a portfolio manager of the fund as of that date.

MULTI-SUM-SUP-I-121625

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