# EDGAR Filing Document

**Accession Number:** 0000778207
**File Stem:** 0001410368-26-017954
**Filing Date:** 2026-2
**Character Count:** 11835
**Document Hash:** 364c69faebb4695de769379055c8bff4
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-017954.hdr.sgml**: 20260225

**ACCESSION NUMBER**: 0001410368-26-017954

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260225

**DATE AS OF CHANGE**: 20260225

**PERIOD START**: 20251231

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** TRANSAMERICA SERIES TRUST
- **CENTRAL INDEX KEY:** 0000778207

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-04419
- **FILM NUMBER:** 26676210

**BUSINESS ADDRESS:**
- **STREET 1:** 1801 CALIFORNIA STREET
- **STREET 2:** SUITE 5200
- **CITY:** DENVER
- **STATE:** CO
- **ZIP:** 80202
- **BUSINESS PHONE:** 720-482-8836

**MAIL ADDRESS:**
- **STREET 1:** 1801 CALIFORNIA STREET
- **STREET 2:** SUITE 5200
- **CITY:** DENVER
- **STATE:** CO
- **ZIP:** 80202

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AEGON/TRANSAMERICA SERIES TRUST
- **DATE OF NAME CHANGE:** 20050511

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AEGON/TRANSAMERICA SERIES FUND INC
- **DATE OF NAME CHANGE:** 20010501

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** WRL SERIES FUND INC
- **DATE OF NAME CHANGE:** 19920703

## Series and Classes Contracts Data

### Transamerica Market Participation Strategy VP (Series ID: S000036845)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000112680 | Service      |  |

## Form NPORT-P: Monthly Portfolio Investments Report

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

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

- **a. Name of Registrant:** TRANSAMERICA SERIES TRUST

- **b. Investment Company Act file number:** 811-04419

- **c. CIK number of Registrant:** 0000778207

- **d. LEI of Registrant:** 5493000QR1WGXIM5V222

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

  - **Street Address 1:** 1801 CALIFORNIA STREET

  - **City:** DENVER

  - **State:** CO

  - **Foreign country:** US

  - **Zip / Postal Code:** 80202

  - **Telephone number:** 720-493-4256

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

- **a. Name of Series:** Transamerica Market Participation Strategy VP

- **b. EDGAR series identifier (if any):** S000036845

- **c. LEI of Series:** 549300ZQ8NH1BMKMLA21

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

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

- **b. Date as of which information is reported:** 2025-12-31

**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:** $313287174.06

**Total Liabilities:** $35005839.26

**Net Assets:** $278281334.80

**Cash Not Reported:** $460944.68

**Currency Risk Metrics (dv01):**

- 

**Credit Spread Risk - Investment Grade (dv01):**

- **3-Month:** -610.18000000 | **1-Year:** -8599.18000000 | **5-Year:** -9184.03000000 | **10-Year:** 0.00000000 | **30-Year:** 0.00000000

**Credit Spread Risk - Non-Investment Grade (dv01):**

- **3-Month:** 0.00000000 | **1-Year:** 0.00000000 | **5-Year:** 0.00000000 | **10-Year:** 0.00000000 | **30-Year:** 0.00000000

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000112680 | 1.71%                | 0.00%                | -0.42%               |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $0.00                    | $177293.18                                 |
| Month 2  | $0.00                    | $562060.56                                 |
| Month 3  | $0.00                    | $47858.44                                  |

**Designated Index Information**

- **Index Name:** Securities Portfolio VaR

- **Index Identifier:** Designated Reference Portfolio is the Fund's Securities Portfolio

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| EUROPEAN INVESTMENT BANK     | European Investment Bank                                                    | CUSIP: 298785JU1<br>LEI: 5493006YXS1U5GIHE750 | Long             | DBT              | NUSS              | XX        |   7000000 | PA      | $7045273.06   | 2.53%             | 2028-03-15      | Fixed         | 3.88%                 | No            |                  2 | On Loan: No      |
| FEDERAL HOME LOAN BANK       | Federal Home Loan Banks                                                     | CUSIP: 3130AFFX0<br>LEI: 2549001DPIFGXC1TOL40 | Long             | DBT              | USGSE             | US        |  29000000 | PA      | $28833352.95  | 10.36%            | 2028-11-16      | Fixed         | 3.25%                 | No            |                  2 | On Loan: —       |
| FANNIE MAE                   | Federal National Mortgage Association                                       | CUSIP: 31359MEU3<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | DBT              | USGSE             | US        |   6500000 | PA      | $7041289.06   | 2.53%             | 2029-05-15      | Fixed         | 6.25%                 | No            |                  2 | On Loan: No      |
| FANNIE MAE                   | Federal National Mortgage Association                                       | CUSIP: 31359MFP3<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | DBT              | USGSE             | US        |  10000000 | PA      | $11423221.40  | 4.10%             | 2030-05-15      | Fixed         | 7.25%                 | No            |                  2 | On Loan: No      |
| INTER-AMERICAN DEVEL BK      | Inter-American Development Bank                                             | CUSIP: 4581X0EH7<br>LEI: VKU1UKDS9E7LYLMACP54 | Long             | DBT              | NUSS              | XX        |   7000000 | PA      | $7057123.08   | 2.54%             | 2028-01-12      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| INTL BK RECON & DEVELOP      | International Bank for Reconstruction & Development                         | CUSIP: 459058JX2<br>LEI: ZTMSNXROF84AHWJNKQ93 | Long             | DBT              | NUSS              | XX        |  17000000 | PA      | $16745607.07  | 6.02%             | 2026-07-15      | Fixed         | 0.88%                 | No            |                  2 | On Loan: No      |
| Fixed Income Clearing Corp   | FIXED INC CLEARING CORP.REPO                                                | CUSIP: 000000000<br>LEI: 549300H47WTHXPU08X20 | Long             | RA               | CORP              | US        |  13610155 | PA      | $13610155.23  | 4.89%             |  |  |  | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Bills                                                         | CUSIP: 912797SE8<br>LEI: 254900HROIFWPRGM1V77 | Long             | STIV             | UST               | US        |  25000000 | PA      | $24990402.75  | 8.98%             | 2026-01-06      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Bills                                                         | CUSIP: 912797ST5<br>LEI: 254900HROIFWPRGM1V77 | Long             | STIV             | UST               | US        |  25000000 | PA      | $24851922.25  | 8.93%             | 2026-03-03      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Notes                                                         | CUSIP: 912828YQ7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  41000000 | PA      | $40349709.66  | 14.50%            | 2026-10-31      | Fixed         | 1.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Notes                                                         | CUSIP: 91282CLM1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  12000000 | PA      | $11880000.00  | 4.27%             | 2031-09-30      | Fixed         | 3.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury       | U.S. Treasury Bonds, Principal Only STRIPS                                  | CUSIP: 912833PC8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  18000000 | PA      | $17307374.76  | 6.22%             | 2027-02-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Chicago Mercantile Exchange  | Future                                                                      | CUSIP: 000000000<br>LEI: SNZ2OJLFK8MNNCLQOF39 | N/A              | DE               |  | US        |       -39 | NC      | $-47625.45    | -0.02%            |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade       | Future                                                                      | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |        69 | NC      | $-86902.88    | -0.03%            |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade       | Future                                                                      | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |       295 | NC      | $-226346.13   | -0.08%            |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade       | Future                                                                      | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |       259 | NC      | $-105645.84   | -0.04%            |  |  |  | No            |                  1 | On Loan: No      |
| UBS Securities LLC           | Option                                                                      | CUSIP: 000000000<br>LEI: T6FIZBDPKLYJKFCRVK44 | N/A              | DE               |  | US        |       135 | NC      | $30011019.59  | 10.78%            |  |  |  | No            |                  2 | On Loan: No      |
| Goldman Sachs & Co. LLC      | Option                                                                      | CUSIP: 000000000<br>LEI: FOR8UP27PHTHYVLBNG30 | N/A              | DE               |  | US        |       190 | NC      | $36651120.21  | 13.17%            |  |  |  | No            |                  2 | On Loan: No      |
| State Street Global Advisors | State Street Navigator Securities Lending Government Money Market Portfolio | CUSIP: 857509301<br>LEI: 5493008BJIBKQ5KTIF74 | Long             | STIV             | RF                | US        |  17369850 | NS      | $17369850.00  | 6.24%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2026-01-29

**Name of Applicant:** TRANSAMERICA SERIES TRUST

**Signature:** Kari Seabrands

**Name of Signer:** Kari Seabrands

**Title:** Treasurer