# EDGAR Filing Document

**Accession Number:** 0000067160
**File Stem:** 0001752724-25-201496
**Filing Date:** 2025-8
**Character Count:** 12527
**Document Hash:** 96484660832ee70d4aeb896844b08830
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-25-201496.hdr.sgml**: 20250825

**ACCESSION NUMBER**: 0001752724-25-201496

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250630

**FILED AS OF DATE**: 20250825

**DATE AS OF CHANGE**: 20250825

**PERIOD START**: 20251231

**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:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-02224
- **FILM NUMBER:** 251249085

**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 Balanced Allocation Fund (Series ID: S000018540)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000051436 | Initial Class |  |
| C000067779 | Service Class |  |

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** MML SERIES INVESTMENT FUND

- **b. Investment Company Act file number:** 811-02224

- **c. CIK number of Registrant:** 0000067160

- **d. LEI of Registrant:** VQ1HG47DNRJG3HBJH467

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** 1295 State Street

  - **City:** Springfield

  - **State:** MA

  - **Foreign country:** US

  - **Zip / Postal Code:** 01111-0001

  - **Telephone number:** 413-744-1000

**Item A.2. Information about the Series.**

- **a. Name of Series:** MML Balanced Allocation Fund

- **b. EDGAR series identifier (if any):** S000018540

- **c. LEI of Series:** 54930063OMLROMEWP985

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2025-12-31

- **b. Date as of which information is reported:** 2025-06-30

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $282326884.51

**Total Liabilities:** $227439.64

**Net Assets:** $282099444.87

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000067779 | -0.35%               | 2.44%                | 2.61%                |
| Class ID C000051436 | -0.34%               | 2.41%                | 2.69%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-10042950.76            | $3446278.25                                |
| Month 2  | $-877715.20              | $7469770.27                                |
| Month 3  | $-248069.90              | $7596940.26                                |

### Schedule of Portfolio Investments

| Name                                                                 | Title                                                                | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| MML LARGE CAP GROWTH FD                                              | MML LARGE CAP GROWTH FD                                              | CUSIP: 553097734<br>LEI: N/A                  | Long             | EC               | RF                | US        |    607449 | NS      | $11243873.55  | 3.99%             |  |  |  | No            |                  1 | On Loan: No      |
| Fidelity VIP Emerging Markets Portfolio                              | Fidelity VIP Emerging Markets Portfolio                              | CUSIP: 922177324<br>LEI: N/A                  | Long             | EC               | RF                | US        |    205530 | NS      | $2731497.42   | 0.97%             |  |  |  | No            |                  1 | On Loan: No      |
| MML SMALL CAP GROWTH EQUITY FD                                       | MML SMALL CAP GROWTH EQUITY FD                                       | CUSIP: 553097205<br>LEI: N/A                  | Long             | EC               | RF                | US        |    165942 | NS      | $1743523.62   | 0.62%             |  |  |  | No            |                  1 | On Loan: No      |
| MML INCOME AND GROWTH FD                                             | MML INCOME AND GROWTH FD                                             | CUSIP: 553097767<br>LEI: N/A                  | Long             | EC               | RF                | US        |    469744 | NS      | $4843064.82   | 1.72%             |  |  |  | No            |                  1 | On Loan: No      |
| PIMCO Variable Insurance Trust - Long-Term U.S. Government Portfolio | PIMCO Variable Insurance Trust - Long-Term U.S. Government Portfolio | CUSIP: 693394710<br>LEI: 1HF6TMDVSLQTVB8TF611 | Long             | EC               | RF                | US        |    488533 | NS      | $3620029.19   | 1.28%             |  |  |  | No            |                  1 | On Loan: No      |
| MML FOREIGN FD                                                       | MML FOREIGN FD                                                       | CUSIP: 553097650<br>LEI: N/A                  | Long             | EC               | RF                | US        |    601095 | NS      | $6948657.83   | 2.46%             |  |  |  | No            |                  1 | On Loan: No      |
| MML MANAGED BOND FUND                                                | MML MANAGED BOND FUND                                                | CUSIP: 55312G309<br>LEI: N/A                  | Long             | EC               | RF                | US        |   5276228 | NS      | $59131512.15  | 20.96%            |  |  |  | No            |                  1 | On Loan: No      |
| MML BLUE CHIP GROWTH FD                                              | MML BLUE CHIP GROWTH FD                                              | CUSIP: 553097742<br>LEI: N/A                  | Long             | EC               | RF                | US        |    683349 | NS      | $14849167.10  | 5.26%             |  |  |  | No            |                  1 | On Loan: No      |
| MML INFLATION PROTECTED BD FD                                        | MML INFLATION PROTECTED BD FD                                        | CUSIP: 55312G200<br>LEI: N/A                  | Long             | EC               | RF                | US        |    589545 | NS      | $5282321.60   | 1.87%             |  |  |  | No            |                  1 | On Loan: No      |
| MML MID CAP GROWTH FD                                                | MML MID CAP GROWTH FD                                                | CUSIP: 553097692<br>LEI: N/A                  | Long             | EC               | RF                | US        |    727741 | NS      | $8383577.53   | 2.97%             |  |  |  | No            |                  1 | On Loan: No      |
| MML FOCUSED EQUITY FUND                                              | MML FOCUSED EQUITY FUND                                              | CUSIP: 553097197<br>LEI: N/A                  | Long             | EC               | RF                | US        |   2598883 | NS      | $20089368.57  | 7.12%             |  |  |  | No            |                  1 | On Loan: No      |
| Invesco VI Global Strategic Income Fund                              | Invesco VI Global Strategic Income Fund                              | CUSIP: 00900X884<br>LEI: 549300NCC31DI84NL880 | Long             | EC               | RF                | US        |   1039567 | NS      | $4813193.91   | 1.71%             |  |  |  | No            |                  1 | On Loan: No      |
| MML EQUITY INCOME FD                                                 | MML EQUITY INCOME FD                                                 | CUSIP: 553097775<br>LEI: N/A                  | Long             | EC               | RF                | US        |   2110407 | NS      | $22623565.55  | 8.02%             |  |  |  | No            |                  1 | On Loan: No      |
| MML SMALL COMPANY VALUE FUND                                         | MML SMALL COMPANY VALUE FUND                                         | CUSIP: 553097262<br>LEI: N/A                  | Long             | EC               | RF                | US        |    375674 | NS      | $3163173.21   | 1.12%             |  |  |  | No            |                  1 | On Loan: No      |
| MML MID CAP VALUE FD                                                 | MML MID CAP VALUE FD                                                 | CUSIP: 553097718<br>LEI: N/A                  | Long             | EC               | RF                | US        |    770877 | NS      | $6421402.59   | 2.28%             |  |  |  | No            |                  1 | On Loan: No      |
| MassMutual High Yield Fund                                           | MassMutual High Yield Fund                                           | CUSIP: 57629H327<br>LEI: AQDRLVGKF0IT8SWIC757 | Long             | EC               | RF                | US        |     86775 | NS      | $706346.46    | 0.25%             |  |  |  | No            |                  1 | On Loan: No      |
| MML GLOBAL FD                                                        | MML GLOBAL FD                                                        | CUSIP: 553097668<br>LEI: N/A                  | Long             | EC               | RF                | US        |   1611105 | NS      | $7749417.30   | 2.75%             |  |  |  | No            |                  1 | On Loan: No      |
| MML SMALL/MID CAP VALUE                                              | MML SMALL/MID CAP VALUE                                              | CUSIP: 553097684<br>LEI: N/A                  | Long             | EC               | RF                | US        |    219536 | NS      | $1982408.26   | 0.70%             |  |  |  | No            |                  1 | On Loan: No      |
| MML INTERNATIONAL EQUITY FUND                                        | MML INTERNATIONAL EQUITY FUND                                        | CUSIP: 553097155<br>LEI: N/A                  | Long             | EC               | RF                | US        |   1691317 | NS      | $20498757.69  | 7.27%             |  |  |  | No            |                  1 | On Loan: No      |
| MML FUNDAMENTAL GROWTH FUND                                          | MML FUNDAMENTAL GROWTH FUND                                          | CUSIP: 553097171<br>LEI: N/A                  | Long             | EC               | RF                | US        |    776625 | NS      | $9575790.31   | 3.39%             |  |  |  | No            |                  1 | On Loan: No      |
| MML SHORT DURATION BOND FUND                                         | MML SHORT DURATION BOND FUND                                         | CUSIP: 55312G754<br>LEI: N/A                  | Long             | EC               | RF                | US        |   1320535 | NS      | $12413033.49  | 4.40%             |  |  |  | No            |                  1 | On Loan: No      |
| MML TOTAL RETURN BOND FUND                                           | MML TOTAL RETURN BOND FUND                                           | CUSIP: 553097221<br>LEI: N/A                  | Long             | EC               | RF                | US        |   5878921 | NS      | $53498184.93  | 18.96%            |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2025-07-28

**Name of Applicant:** MML SERIES INVESTMENT FUND

**Signature:** Renee Hitchcock

**Name of Signer:** Renee Hitchcock

**Title:** CFO and Treasurer