# EDGAR Filing Document

**Accession Number:** 0000778207
**File Stem:** 0001193125-26-269015
**Filing Date:** 2026-6
**Character Count:** 3333
**Document Hash:** 5fe6846ea2f482444d09330865775a0a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-269015.hdr.sgml**: 20260612

**ACCESSION NUMBER**: 0001193125-26-269015

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260612

**DATE AS OF CHANGE**: 20260612

**EFFECTIVENESS DATE**: 20260612

**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:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-00507
- **FILM NUMBER:** 261085832

**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 ProFund UltraBear VP (Series ID: S000025331)

---

|  |  |
|:---|:---|
| Class Name | Class ID   |
| Initial    | C000075537 |
| Service    | C000075538 |

---

## Series and Classes Contracts Data

### Transamerica ProFund UltraBear VP (Series ID: S000025331)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000075537 | Initial      |  |
| C000075538 | Service      |  |

**TRANSAMERICA SERIES TRUST** 

**Transamerica ProFund UltraBear VP** 

**Supplement to the Currently Effective Prospectus, Summary Prospectus** 

**and Statement of Additional Information** 

\* \* \*

The Board of Trustees has approved the liquidation of Transamerica ProFund UltraBear VP (the "portfolio").

The liquidation is subject to investor approval. Proxy materials describing the liquidation are expected to be mailed to investors on or about August 17, 2026. If investor approval is obtained, it is expected that the liquidation will take place on or about October 30, 2026. Effective on or about October 28, 2026, the portfolio will be closed to all investments.

In order to achieve an orderly liquidation, if the liquidation is approved by investors, the portfolio's assets may be converted into cash or cash equivalents. As the portfolio's assets are being converted to cash and through the liquidation, the portfolio will no longer be pursuing its stated investment objective.

If the liquidation is approved by investors, upon liquidation of the portfolio, your liquidation proceeds will be exchanged into the corresponding share class of Transamerica BlackRock Government Money Market VP. Additional information regarding the exchange will be provided in the proxy materials.

Effective upon the liquidation of the portfolio, all references to Transamerica ProFund UltraBear VP will be deleted in their entirety from the Prospectus and the Statement of Additional Information.

\* \* \*

**Investors Should Retain this Supplement for Future Reference** 

**June 12, 2026**