# EDGAR Filing Document

**Accession Number:** 0000916053
**File Stem:** 0001133228-26-002968
**Filing Date:** 2026-3
**Character Count:** 3193
**Document Hash:** 9616badf553ab4f578592f0adbf9bed7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001133228-26-002968.hdr.sgml**: 20260304

**ACCESSION NUMBER**: 0001133228-26-002968

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260304

**DATE AS OF CHANGE**: 20260304

**EFFECTIVENESS DATE**: 20260304

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MASSMUTUAL SELECT FUNDS
- **CENTRAL INDEX KEY:** 0000916053

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-73824
- **FILM NUMBER:** 26721576

**BUSINESS ADDRESS:**
- **STREET 1:** 1295 STATE STREET
- **CITY:** SPRINGFIELD
- **STATE:** MA
- **ZIP:** 01111
- **BUSINESS PHONE:** 413-744-1000

**MAIL ADDRESS:**
- **STREET 1:** 1295 STATE STREET
- **CITY:** SPRINGFIELD
- **STATE:** MA
- **ZIP:** 01111

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MASSMUTUAL INSTITUTIONAL FUNDS
- **DATE OF NAME CHANGE:** 19931213

## Series and Classes Contracts Data

### MassMutual Small Cap Growth Equity Fund (Series ID: S000003668)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000010227 | Class A              | MMGEX           |
| C000010228 | Administrative Class | MSGLX           |
| C000010229 | Class R3             | MSGNX           |
| C000010230 | Class R5             | MSGSX           |
| C000010231 | Service Class        | MSCYX           |
| C000093671 | Class I              | MSGZX           |
| C000140361 | Class R4             | MSERX           |
| C000240793 | Class Y              | MMNJX           |

#### MASSMUTUAL FUNDS<br>

#### MassMutual Small Cap Growth Equity Fund<br>

#### Supplement dated March 4, 2026 to the<br>

#### Prospectus dated February 1, 2026 and the<br>

#### Summary Prospectus dated February 1, 2026
This supplement provides new and additional information beyond that contained in the Prospectus and Summary Prospectus. It should be retained and read in conjunction with the Prospectus and Summary Prospectus.

*Effective immediately, the following information supplements the information found under the heading **Portfolio Manager(s)** in the section titled **Management** (on page 30 of the Prospectus):* 

#### Justin Livengood, CFA is a Portfolio Manager at Invesco Advisers. He has managed the Fund since February 2026.
*Effective immediately, the following information supplements the information for **Invesco Advisers, Inc.** found under the heading **Subadvisers and Portfolio Managers** in the section titled **Management of the Funds** on page 51 of the Prospectus:* 

#### Justin Livengood, CFA <br>
**is a portfolio manager of the *MassMutual Small Cap Growth Equity Fund.* Mr. Livengood is a Portfolio Manager at Invesco Advisers. He has been associated with Invesco Advisers and/or its affiliates since 2019. Prior to 2019, he was a Senior Portfolio Manager of OppenheimerFunds, Inc. ("OFI") since 2006. Prior to joining OFI, Mr. Livengood was a Vice President and Fund Analyst with Merrill Lynch Investment Managers.** 

#### PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE

#### SELPRO-26-01 <br>

#### SCGE-26-01