# EDGAR Filing Document

**Accession Number:** 0000778207
**File Stem:** 0001193125-26-272850
**Filing Date:** 2026-6
**Character Count:** 6886
**Document Hash:** 53302af6a3818260145f93ebb19bc743
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-272850.hdr.sgml**: 20260616

**ACCESSION NUMBER**: 0001193125-26-272850

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260616

**DATE AS OF CHANGE**: 20260616

**EFFECTIVENESS DATE**: 20260616

**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:** 261095686

**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 PineBridge Inflation Opportunities VP (Series ID: S000031958)

---

|  |  |
|:---|:---|
| Class Name | Class ID   |
| Initial    | C000099475 |
| Service    | C000099476 |

---

## Series and Classes Contracts Data

### Transamerica PineBridge Inflation Opportunities VP (Series ID: S000031958)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000099475 | Initial      |  |
| C000099476 | Service      |  |

**TRANSAMERICA SERIES TRUST** 

**Supplement to the Currently Effective Prospectus, Summary Prospectus and Statement of Additional Information** 

**Transamerica PineBridge Inflation Opportunities VP** 

\* \* \*

Effective immediately, Gunter H. Seeger no longer serves as a portfolio manager of the portfolio.

*Effective immediately, the following replaces the corresponding information for the portfolio in the "Management" section of the Prospectus and Summary Prospectus:* 

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp; **Management:** | &nbsp;&nbsp; **Management:** | &nbsp;&nbsp; **Management:** |
| &nbsp;&nbsp; *Investment Manager:* Transamerica Asset Management, Inc.  | &nbsp;&nbsp; *Investment Manager:* Transamerica Asset Management, Inc.  | &nbsp;&nbsp; *Investment Manager:* Transamerica Asset Management, Inc.  |
| &nbsp;&nbsp; *Sub-Adviser:* PineBridge Investments LLC | &nbsp;&nbsp; *Sub-Adviser:* PineBridge Investments LLC | &nbsp;&nbsp; *Sub-Adviser:* PineBridge Investments LLC |
| &nbsp;&nbsp; *Portfolio Managers:* | &nbsp;&nbsp; *Portfolio Managers:* | &nbsp;&nbsp; *Portfolio Managers:* |
| &nbsp;&nbsp; Robert A. Vanden Assem, CFA | Co-Portfolio Manager | since November 2014 |
| &nbsp;&nbsp; Roberto Coronado | Co-Portfolio Manager | since October 2016 |

---

*Effective immediately, the following replaces the corresponding information for the portfolio in the "Shareholder Information – Portfolio Manager(s)" section of the Prospectus :* 

**Transamerica PineBridge Inflation Opportunities VP** 

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;**Name** | **Sub-Adviser** | **Positions Over Past Five Years** |
| &nbsp;&nbsp;&nbsp;Robert A. Vanden Assem, CFA | PineBridge Investments LLC | Co-Portfolio Manager of the portfolio since 2014; Employee of PineBridge Investments LLC since 2001; Managing Director and Head of Investment Grade Fixed-Income |
| &nbsp;&nbsp;&nbsp;Roberto Coronado | PineBridge Investments LLC | Co-Portfolio Manager of the portfolio since 2016; Employee of PineBridge Investments LLC since 2014; Managing Director and Senior Portfolio Manager of Global Rates and Investment Grade Fixed-Income |

---

\* \* \*

*Effective immediately, the following replaces the corresponding information under the section in Appendix B of the Statement of Additional Information entitled "Portfolio Managers – PineBridge Investments LLC ("PineBridge")":* 

**Transamerica PineBridge Inflation Opportunities VP** 

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| &nbsp;&nbsp;&nbsp;**Portfolio Manager** | **Registered Investment**<br> **Companies** | **Registered Investment**<br> **Companies** | **Other Pooled Investment**<br> **Vehicles** | **Other Pooled Investment**<br> **Vehicles** | **Other Accounts** | **Other Accounts** |
| &nbsp;&nbsp;&nbsp;**Portfolio Manager** | **Number** | **Assets**<br> **Managed**  | **Number** | **Assets**<br> **Managed**  | **Number** | **Assets**<br> **Managed**  |
| &nbsp;&nbsp;&nbsp;Robert A. Vanden Assem, CFA | 5 | $1.66 billion | 13 | $5.21 billion | 17 | $5.94 billion |
| &nbsp;&nbsp;&nbsp;Roberto Coronado | 2 | $423 million | 3 | $1.14 million | 2 | $136 million |
| &nbsp;&nbsp;&nbsp; **Fee Based Accounts**<br> **(The number of accounts and the total assets in the accounts managed by each portfolio manager with**<br> **respect to which the advisory fee is based on the performance of the account.)** | &nbsp;&nbsp;&nbsp; **Fee Based Accounts**<br> **(The number of accounts and the total assets in the accounts managed by each portfolio manager with**<br> **respect to which the advisory fee is based on the performance of the account.)** | &nbsp;&nbsp;&nbsp; **Fee Based Accounts**<br> **(The number of accounts and the total assets in the accounts managed by each portfolio manager with**<br> **respect to which the advisory fee is based on the performance of the account.)** | &nbsp;&nbsp;&nbsp; **Fee Based Accounts**<br> **(The number of accounts and the total assets in the accounts managed by each portfolio manager with**<br> **respect to which the advisory fee is based on the performance of the account.)** | &nbsp;&nbsp;&nbsp; **Fee Based Accounts**<br> **(The number of accounts and the total assets in the accounts managed by each portfolio manager with**<br> **respect to which the advisory fee is based on the performance of the account.)** | &nbsp;&nbsp;&nbsp; **Fee Based Accounts**<br> **(The number of accounts and the total assets in the accounts managed by each portfolio manager with**<br> **respect to which the advisory fee is based on the performance of the account.)** | &nbsp;&nbsp;&nbsp; **Fee Based Accounts**<br> **(The number of accounts and the total assets in the accounts managed by each portfolio manager with**<br> **respect to which the advisory fee is based on the performance of the account.)** |
| &nbsp;&nbsp;&nbsp;Robert A. Vanden Assem, CFA | 0 | $0 | 0 | $0 | 3 | $849 million |
| &nbsp;&nbsp;&nbsp;Roberto Coronado | 0 | $0 | 0 | $0 | 0 | $0 |

---

\* \* \*

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

**June 16, 2026**