Transamerica Series Trust

03/24/2026 | Press release | Distributed by Public on 03/24/2026 12:22

Prospectus by Investment Company (Form 497)

TRANSAMERICA SERIES TRUST

Supplement to the Currently Effective Prospectus, Summary Prospectus

and Statement of Additional Information

Transamerica Aegon High Yield Bond VP

* * *

Effective April 1, 2026, Andrew Maslan will be added as a portfolio manager of the portfolio. Effective on or about April 28, 2026, Benjamin D. Miller, CFA, will no longer serve as a portfolio manager of the portfolio.

* * *

Effective April 1, 2026, the following will replace the corresponding information for the portfolio in the "Management" section of the Prospectus and Summary Prospectus:

 Management:

Investment Manager: Transamerica Asset Management, Inc.

 Sub-Adviser: Aegon USA Investment Management, LLC

Portfolio Managers:

 Kevin Bakker, CFA

Portfolio Manager

since November 2009

 Benjamin D. Miller, CFA1

Portfolio Manager

since November 2009

 Andrew Maslan

Portfolio Manager

since April 2026

 James K. Schaeffer, Jr.

Portfolio Manager

since March 2011

1 Effective April 28, 2026, Mr. Miller will no longer serve as a Portfolio Manager of the portfolio.

Effective April 1, 2026, the following will replace the corresponding information for the portfolio in the "Shareholder Information - Portfolio Manager(s)" section of the Prospectus:

Name

Sub-Adviser

Positions Over Past Five Years

Kevin Bakker, CFA Aegon USA Investment Management, LLC  Portfolio Manager of the portfolio since 2009; Employee with Aegon USA Investment Management, LLC since 2003, initially as a research analyst and became a portfolio manager in 2007; Head of U.S. High Yield
Benjamin D. Miller, CFA* Aegon USA Investment Management, LLC  Portfolio Manager of the portfolio since 2009; Employee with Aegon USA Investment Management, LLC since 1993, initially as a research analyst and became a portfolio manager in 2006
Andrew Maslan Aegon USA Investment Management, LLC  Portfolio Manager of the fund since 2026; Employee with Aegon USA Investment Management, LLC since 2024; Currently a portfolio manager and research team leader on the Distressed Credit team; Director, M&G Investments from 2020 to 2024; previously employed at Aegon USA Investment Management, LLC from 2015 to 2020
James K. Schaeffer, Jr. Aegon USA Investment Management, LLC Portfolio Manager of the portfolio since 2011; Employee with Aegon USA Investment Management, LLC since 2004 and held various investment management roles; Currently Head of US Leveraged Finance and Global CLOs

* Effective April 28, 2026, Mr. Miller will no longer serve as a Portfolio Manager of the portfolio.

* * *

Effective April 1, 2026, the following will replace the corresponding information for the portfolio in the "Portfolio Managers - Aegon USA Investment Management, LLC ("AUIM")" section of Appendix B of the Statement of Additional Information:

Transamerica Aegon High Yield Bond VP

Portfolio Manager Registered Investment 
Companies
Other Pooled Investment
Vehicles
Other Accounts
Number Assets
Managed
Number Assets
Managed
Number  Assets
Managed
Kevin Bakker, CFA* 1 $844 million 2 $345 million 6 $935 million 
Benjamin D. Miller, CFA* 1 $844 million 2 $345 million 6 $935 million
Andrew Maslan* 0 $0 0 $0 1 $99 million
James K. Schaeffer, Jr.* 1 $844 million 2 $345 million 9 $1.1 billion
Fee Based Accounts
(The number of accounts and the total assets in the accounts managed by each portfolio manager with
respect to which the advisory fee is based on the performance of the account.)
Kevin Bakker, CFA* 0 $0 0 $0 2 $527 million
Benjamin D. Miller, CFA* 0 $0 0 $0 2 $527 million
Andrew Maslan* 0 $0 0 $0 0 $0
James K. Schaeffer, Jr.* 0 $0 0 $0 1 $490 million

 * As of December 31, 2025

Effective April 28, 2026, Mr. Miller will no longer serve as a Portfolio Manager of the portfolio.

* * *

Investors Should Retain this Supplement for Future Reference

March 24, 2026

Transamerica Series Trust published this content on March 24, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on March 24, 2026 at 18:22 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]