# EDGAR Filing Document

**Accession Number:** 0000916053
**File Stem:** 0001133228-25-010038
**Filing Date:** 2025-9
**Character Count:** 3333
**Document Hash:** fd46bcb71fcaa718f367ff32794b19f1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001133228-25-010038.hdr.sgml**: 20250923

**ACCESSION NUMBER**: 0001133228-25-010038

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20250923

**DATE AS OF CHANGE**: 20250923

**EFFECTIVENESS DATE**: 20250923

**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:** 251334603

**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 Diversified Value Fund (Series ID: S000003679)

| Class ID   | Class Name           | Ticker Symbol   |
|:---|:---|:---|
| C000010282 | Class A              | MDDAX           |
| C000010283 | Administrative Class | MDDLX           |
| C000010284 | Class R3             | MDVNX           |
| C000010285 | Class R5             | MDVSX           |
| C000010286 | Service Class        | MDVYX           |
| C000140383 | Class I              | MDDIX           |
| C000140384 | Class R4             | MDDRX           |
| C000240796 | Class Y              | MMNBX           |

#### MASSMUTUAL FUNDS<br>

#### MassMutual Diversified Value Fund<br>

#### Supplement dated September 23, 2025 to the<br>

#### Summary Prospectus dated February 1, 2025
This supplement provides new and additional information beyond that contained in the Summary Prospectus and any previous supplements. It should be retained and read in conjunction with the Summary Prospectus and any previous supplements.

*Effective September 15, 2025, the reorganization of the Selling Fund listed in the table below (the "Selling Fund") with and into the Acquiring Fund listed in the table below (the "Acquiring Fund") occurred pursuant to an Agreement and Plan of Reorganization, approved by the Board of Trustees of the Selling Fund and the Acquiring Fund. The Selling Fund's assets and liabilities were transferred to the Acquiring Fund in return for shares of the Acquiring Fund with an aggregate net asset value equal to the aggregate value of the assets that it received from the Selling Fund, less the liabilities it assumed from the Selling Fund. The Acquiring Fund shares were distributed pro rata to shareholders of the Selling Fund, in liquidation of the Selling Fund. Existing shareholders of the Selling Fund thus became shareholders of the Acquiring Fund and received shares of the Acquiring Fund with a value equal to their shares of the Selling Fund at the time of the reorganization.* 

---

| | |
|:---|:---|
| **Selling Fund** | **Acquiring Fund**  |
| MassMutual Equity Opportunities Fund<br>(*a series of MassMutual Select Funds*) | MassMutual Diversified Value Fund<br>(*a series of MassMutual Select Funds*) |

---

#### PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE

#### DV-25-03