# EDGAR Filing Document

**Accession Number:** 0000067160
**File Stem:** 0001133228-25-012747
**Filing Date:** 2025-11
**Character Count:** 5175
**Document Hash:** 3b94b547123f041db3e062963064c707
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001133228-25-012747.hdr.sgml**: 20251125

**ACCESSION NUMBER**: 0001133228-25-012747

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251125

**DATE AS OF CHANGE**: 20251125

**EFFECTIVENESS DATE**: 20251125

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MML SERIES INVESTMENT FUND
- **CENTRAL INDEX KEY:** 0000067160

**ORGANIZATION NAME:**
- **EIN:** 042476032
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-39334
- **FILM NUMBER:** 251516579

**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:** MML EQUITY INVESTMENT CO INC
- **DATE OF NAME CHANGE:** 19850227

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MML INVESTMENT CO INC
- **DATE OF NAME CHANGE:** 19811109

## Series and Classes Contracts Data

### MML Moderate Allocation Fund (Series ID: S000018541)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000051437 | Initial Class |  |
| C000067780 | Service Class |  |

#### MML SERIES INVESTMENT FUND<br>

#### MML Moderate Allocation Fund<br>

#### Supplement dated November 25, 2025 to the<br>

#### Prospectus dated April 25, 2025 and<br>

#### Summary Prospectus dated April 25, 2025
This supplement provides new and additional information beyond that contained in the Prospectus and Summary Prospectus, and any previous supplements. It should be retained and read in conjunction with the Prospectus and Summary Prospectus, and any previous supplements.

*The following information replaces similar information found under the heading **Principal Investment Strategies** in the section titled **Investments, Risks, and Performance:***

The table below shows the Fund's approximate allocation, as of November 17, 2025, among various asset classes and MML Underlying Funds. MML Advisers does not intend to trade actively among MML Underlying Funds or to attempt to capture short-term market opportunities as primary activities. MML Advisers in its absolute discretion may modify the asset allocation strategy or the selection of MML Underlying Funds at any time and from time to time, and may invest the Fund's assets in additional or different MML Underlying Funds, including Funds that may be created in the future. At any given time, the Fund's allocations to MML Underlying Funds may be affected by a variety of factors (such as, for example, whether an MML Underlying Fund is accepting additional investments). Information regarding the Fund's actual allocations to MML Underlying Funds is available in the Fund's shareholder reports and at https://www.massmutual.com/funds from time to time. A brief description of the MML Underlying Funds is included in Appendix E of the Statement of Additional Information ("SAI").

---

| | |
|:---|:---|
| ***Equity Funds*** | **60.00%**  |
| **– U.S. Large Cap Equity Funds**<br>|  |
| MML Blue Chip Growth Fund | &nbsp;&nbsp; 6.66%  |
| MML Equity Income Fund | &nbsp;&nbsp; 9.63%  |
| MML Focused Equity Fund | &nbsp;&nbsp; 8.27%  |
| MML Fundamental Equity Fund | &nbsp;&nbsp; 4.24%  |
| MML Income & Growth Fund | &nbsp;&nbsp; 2.17%  |
| MML Large Cap Growth Fund | &nbsp;&nbsp; 4.85%  |
| **– U.S. Mid Cap Equity Funds**<br>|  |
| MML Invesco Discovery Mid Cap Fund | &nbsp;&nbsp; 0.68%  |
| MML Mid Cap Growth Fund | &nbsp;&nbsp; 2.75%  |
| MML Mid Cap Value Fund | &nbsp;&nbsp; 2.68%  |
| &nbsp;&nbsp; MML Small/Mid Cap Value Fund | &nbsp;&nbsp; 0.81%  |
| **– U.S. Small Cap Equity Funds**<br>|  |
| MML Small Cap Growth Equity Fund | &nbsp;&nbsp; 0.76%  |
| MML Small Company Value Fund | &nbsp;&nbsp; 1.25%  |
| **– Global Developed Funds**<br>|  |
| MML Global Fund | &nbsp;&nbsp; 3.30%  |
| **– International Developed Funds**<br>|  |
| MML Foreign Fund | &nbsp;&nbsp; 2.83%  |
| MML International Equity Fund | &nbsp;&nbsp; 8.25%  |
| **– Emerging Markets Funds**<br>|  |
| Fidelity VIP Emerging Markets Portfolio | &nbsp;&nbsp; 1.30%  |
| ***Fixed Income Funds*** | **40.00%**  |
| &nbsp;&nbsp; **– Global Bond Funds** |  |
| Invesco Global Strategic Income Fund | &nbsp;&nbsp; 1.33%  |
| **– High Yield Bond Funds**<br>|  |
| MassMutual High Yield Fund | &nbsp;&nbsp; 0.21%  |
| **– Inflation Managed Funds**<br>|  |
| MML Inflation-Protected and Income Fund | &nbsp;&nbsp; 1.44%  |
| **– U.S. Long-Term Bond Funds**<br>|  |
| PIMCO Long-Term U.S. Government Portfolio | &nbsp;&nbsp; 1.26%  |

---

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---

| | |
|:---|:---|
| **– U.S. Core/Core Plus Bond Funds**<br>|  |
| MML Managed Bond Fund | 16.81%  |
| MML Total Return Bond Fund | 15.09%  |
| **– U.S. Short-Term Bond Funds**<br>|  |
| MML Short-Duration Bond Fund | &nbsp;&nbsp; 3.42% |

---

Note: Above allocations may not sum up to 100% due to rounding.

#### PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE

#### MMLALLPRO-25-03 <br>

#### MA-25-01

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