# EDGAR Filing Document

**Accession Number:** 0000778207
**File Stem:** 0001193125-26-197211
**Filing Date:** 2026-4
**Character Count:** 43497
**Document Hash:** f5dc63060c652f4356e03dabad4cbefe
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-197211.hdr.sgml**: 20260430

**ACCESSION NUMBER**: 0001193125-26-197211

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 4

**FILED AS OF DATE**: 20260430

**DATE AS OF CHANGE**: 20260430

**EFFECTIVENESS DATE**: 20260430

**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:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-00507
- **FILM NUMBER:** 26925213

**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 AEGON U.S. Government Securities VP (Series ID: S000007926)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000021497 | Initial      |  |
| C000021498 | Service      |  |

![](g29247tf_blacknotrust.jpg)

**Transamerica Aegon U.S. Government Securities VP** 

**Summary Prospectus May 1, 2026**

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Class Initial & Service (No Ticker)

This summary prospectus is designed to provide shareholders with key portfolio information in a clear and concise format. Before you invest, you may want to review the portfolio's prospectus, which contains more information about the portfolio and its risks. You can find the portfolio's prospectus, reports to shareholders, and other information about the portfolio, including the portfolio's statement of additional information, online at https://www.transamerica.com/financial-pro/annuities/prospectus. You can also get this information at no cost by calling 866-414-6349 or by sending an e-mail request to orders@mysummaryprospectus.com, or from your financial professional. The portfolio's prospectus and statement of additional information, both dated May 1, 2026, as supplemented from time to time, are incorporated by reference into this summary prospectus.

**Investment Objective:** Seeks to provide as high a level of total return as is consistent with prudent investment strategies.

**Fees and Expenses:** This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the portfolio, but it does not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, fees would be higher.

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**Shareholder Fees (fees paid directly from your investment)** 

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| | | |
|:---|:---|:---|
| **Class:** | **Initial**  | **Service**  |
| Maximum sales charge (load) imposed on purchases <br> (as a percentage of offering price)<br>| None | None |
| Maximum deferred sales charge (load) (as a <br> percentage of purchase price or redemption <br> proceeds, whichever is lower)<br>| None | None |

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**Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)** 

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| | | |
|:---|:---|:---|
| **Class:** | **Initial** | **Service** |
| Management fees | 0.52% | 0.52% |
| Distribution and service (12b-1) fees |  | 0.25% |
| Other expenses | 0.07% | 0.07% |
| Total annual fund operating expenses | 0.59% | 0.84% |
| Fee waiver and/or expense reimbursement<sup>1</sup> <br>| 0.03% | 0.03% |
| Total annual fund operating expenses after fee <br> waiver and/or expense reimbursement<br>| 0.56% | 0.81% |

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Contractual arrangements have been made with the portfolio's investment manager, Transamerica Asset Management, Inc. ("TAM"), through May 1, 2027 to waive fees and/or reimburse portfolio expenses to the extent that the total annual fund operating expenses exceed 0.56% for Initial Class shares and 0.81% for Service Class shares, excluding, as applicable, acquired fund fees and expenses, interest (including borrowing costs and overdraft charges), taxes, brokerage commissions, dividend and interest expenses on securities sold short, extraordinary expenses and other expenses not incurred in the ordinary course of the portfolio's business. These arrangements cannot be terminated prior to May 1, 2027 without the Board of Trustees' consent. TAM is permitted to recapture amounts waived and/or reimbursed to a class during

any of the 36 months from the date on which TAM waived fees and/or reimbursed expenses for the class if the class' total annual fund operating expenses have fallen to a level below the limits described above. In no case will TAM recapture any amount that would result, on any particular business day of the portfolio, in the class's total annual operating expenses exceeding the applicable limits described above or any other lower limit then in effect.

**Example:** This Example is intended to help you compare the cost of investing in the portfolio with the cost of investing in other mutual funds.

The Example assumes that you invest $10,000 in the portfolio for the time periods indicated and then redeem all shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the portfolio's operating expenses remain the same. The Example does not reflect charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, costs would be higher. The Example reflects applicable waivers and/or reimbursements for the duration of such arrangement(s). Although your actual costs may be higher or lower, based on these assumptions your costs would be:

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **1 year** | **3 years** | **5 years** | **10 years** |
| Initial Class | &nbsp;&nbsp; $57 | &nbsp;&nbsp; $186 | &nbsp;&nbsp; $326 | &nbsp;&nbsp; $735 |
| Service Class | &nbsp;&nbsp; $83 | &nbsp;&nbsp; $265 | &nbsp;&nbsp; $463 | &nbsp;&nbsp; $1034 |

---

**Portfolio Turnover:** The portfolio pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual portfolio operating expenses or in the Example, affect the portfolio's performance.

During the most recent fiscal year, the portfolio turnover rate for the portfolio was 78% of the average value of its portfolio.

**Principal Investment Strategies:** The portfolio's sub-adviser, Aegon USA Investment Management, LLC (the "sub-adviser"), invests, under normal circumstances, at least 80% of the portfolio's net assets (plus the amount of borrowings, if any, for investment purposes) in U.S. government debt obligations, or obligations guaranteed by U.S. government agencies or government sponsored entities and mortgage-backed securities issued or guaranteed by the U.S. government, its agencies or government-sponsored entities. These securities may include:

• U.S. Treasury obligations

• Obligations issued by or guaranteed by U.S. government agencies or government-sponsored entities, including inflation-protected bonds. Obligations guaranteed by U.S. government agencies or government-sponsored entities include issues by non-government-sponsored entities (like financial institutions) that carry direct guarantees from U.S. government agencies as part of government initiatives in response to the market crisis or otherwise

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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

• Mortgage-backed securities guaranteed by Ginnie Mae or other U.S. government agencies or government-sponsored entities such as Freddie Mac or Fannie Mae

• Collateralized mortgage obligations issued by private issuers for which the underlying mortgage-backed securities serving as collateral are backed by the U.S. government or its agencies and government-sponsored entities

The weighted average duration of the portfolio will generally range from four to eight years.

The portfolio may invest up to 20% of its net assets in investment grade corporate bonds, short-term corporate debt securities, asset-backed securities, commercial mortgage-backed securities, mortgage-backed securities not guaranteed by the U.S. government, zero coupon bonds, "interest only" or "principal only" securities, high yield debt securities, debt securities of foreign corporate or sovereign issuers in developed countries, and obligations of U.S. banks and foreign banks denominated in U.S. dollars or other currencies. Investment grade debt securities carry a rating of at least BBB from Standard & Poor's or Fitch or Baa from Moody's or are of comparable quality as determined by the portfolio's sub-adviser.

The portfolio invests in debt obligations that the sub-adviser believes offer attractive yields and are undervalued relative to issues of similar credit quality and interest rate sensitivity. In managing the portfolio's assets, the sub-adviser uses a combination of global "top-down" analysis of the macroeconomic and interest rate environment and proprietary "bottom-up" research of government debt and other debt instruments. In the sub-adviser's "top-down" approach, the sub-adviser analyzes various fundamental, technical, sentiment, and valuation factors that the sub-adviser believes affect the movement of markets and securities prices worldwide. This information helps to inform the sub-adviser's decisions regarding the portfolio's duration, yield-curve positioning and level of exposure to various asset classes. In its proprietary "bottom-up" research, the sub-adviser considers various fundamental and other factors, such as creditworthiness, cash flows, capital structure and, as applicable, collateral.

The portfolio may, but is not required to, engage in certain investment strategies involving derivatives, such as options, futures (including regularly employing interest rate futures), forward currency contracts and swaps, including, but not limited to, interest rate, total return and credit default swaps. These investment strategies may be employed as a hedging technique, as a means of altering investment characteristics of the portfolio (such as shortening or lengthening duration), in an attempt to enhance returns or for other purposes. The use of derivatives may be deemed to involve the use of leverage because the portfolio is not required to invest the full market value of the contract upon entering into the contract but participates in gains and losses on the full contract price and because the portfolio's use of derivative instruments may result in its exposure exceeding 100% of portfolio value. The portfolio may maintain a significant percentage of its assets in cash and cash equivalent instruments, some of which may serve as margin for the portfolio's obligations under derivatives transactions.

The portfolio may purchase securities on a when-issued, delayed delivery, to be announced or forward commitment basis. The portfolio may also invest in dollar rolls.

**Principal Risks:** Risk is inherent in all investing. Many factors and risks affect the portfolio's performance, including those described below. The value of your investment in the portfolio, as well as the amount of return you receive on your investment, may fluctuate significantly day to day and over time. You may lose part or all of your investment in the portfolio or your investment may not perform as well as other similar investments. The following is a summary description of principal risks (in alphabetical order after certain key risks) of investing in the portfolio. The relative significance of the key risks below may change over time and you should review each risk factor carefully. An investment in the portfolio is not a bank deposit and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. **You may lose money if you invest in this portfolio.**

**Market** – The market prices of the portfolio's securities or other assets may go up or down, sometimes rapidly or unpredictably, due to factors such as economic events, inflation, changes in interest rates, governmental actions or interventions, actions taken by the U.S. Federal Reserve or foreign central banks, market disruptions caused by tariffs, trade disputes, labor strikes, supply chain disruptions or other factors, government shutdowns, political developments, civil unrest, acts of terrorism, armed conflicts, economic sanctions, countermeasures in response to sanctions, cybersecurity events, technological developments (such as artificial intelligence and machine learning), investor sentiment, the global and domestic effects of widespread or local health, weather or climate events, and other factors that may or may not be related to the issuer of the security or other asset. The market price of a security may also fall due to specific conditions that affect a particular sector of the securities market, a particular industry or a particular issuer or group of issuers. To the extent that securities of certain issuers behave or are perceived to behave similarly to each other, the market prices of those securities (or the market as a whole) may fall in response to a decline in the price of a particular security or group of securities. If the market prices of the portfolio's securities and assets fall, the value of your investment in the portfolio could go down.

Economies and financial markets throughout the world are increasingly interconnected. Events or circumstances in one or more countries or regions could be highly disruptive to, and have profound impacts on, global economies or markets. As a result, whether or not the portfolio invests in securities of issuers located in or with significant exposure to the countries directly affected, the value and liquidity of the portfolio's investments may go down.

The long-term consequences to the U.S. economy of the continued expansion of U.S. government debt and deficits are not known. Also, raising the ceiling on U.S. government debt and periodic legislation to fund the government have become increasingly politicized. Any failure to do either could lead to a default on U.S. government obligations, with unpredictable consequences for the portfolio's investments, and generally for economies and markets in the U.S. and elsewhere.

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**Interest Rate** –The value of fixed-income securities generally goes down when interest rates rise. A rise in rates tends to have a greater impact on the prices of longer term or duration securities. Changes in interest rates can be sudden and unpredictable and may expose the markets to significant volatility, which also may affect the liquidity of the portfolio's investments and detract from portfolio performance. A variety of factors can impact interest rates, including central bank monetary policies and inflation rates. A general rise in interest rates may cause investors to sell fixed-income securities on a large scale, which could adversely affect the price and liquidity of fixed-income securities generally and could also result in increased redemptions from the portfolio. Increased redemptions could cause the portfolio to sell securities at inopportune times or depressed prices and result in further losses. Inflation and interest rates have been volatile and may increase in the future. Interest rate increases in the future may cause the value of fixed-income securities to decrease and, conversely, interest rate reductions may cause the value of fixed-income securities to increase.

**U.S. Government Securities** – U.S. government securities are subject to market risk, interest rate risk and credit risk. Securities backed by the Treasury or the full faith and credit of the U.S. government are guaranteed only as to the timely payment of interest and principal when held to maturity. Accordingly, the current market values for these securities will fluctuate with changes in interest rates and the financial condition or credit rating of the U.S. government. Notwithstanding that these securities are backed by the full faith and credit of the U.S. government, circumstances could arise that would prevent the payment of interest or principal. Securities issued by U.S. government-sponsored entities and federal agencies and instrumentalities that are not backed by the full faith and credit of the U.S. government are not funded by congressional appropriations and the securities issued by them are neither issued nor guaranteed by the U.S. government.

**Credit** – If an issuer or other obligor (such as a party providing insurance or other credit enhancement) of a security held by the portfolio or a counterparty to a financial contract with the portfolio is unable or unwilling to meet its financial obligations, or is downgraded or perceived to be less creditworthy (whether by market participants, ratings agencies, pricing services or otherwise), or if the value of any underlying assets declines, the value of your investment will typically decline. A decline may be rapid and/or significant, particularly in certain market environments. In addition, the portfolio may incur costs and may be hindered or delayed in enforcing its rights against an issuer, obligor or counterparty.

**Mortgage-Related and Asset-Backed Securities –** The value of mortgage-related and asset-backed securities will be influenced by factors affecting the housing market and the assets underlying such securities. As a result, during periods of declining asset values, difficult or frozen credit markets, swings in interest rates, or deteriorating economic conditions, mortgage-related and asset-backed securities may decline in value, face valuation difficulties, become more volatile and/or become illiquid, which could negatively impact the portfolio. Mortgage-backed securities represent direct or indirect participations in, or are collateralized by and payable from, mortgage loans secured by real property. Asset-backed securities represent participations in, or are secured by and payable from, assets such as installment sales or loan contracts, leases, credit card receivables and other categories of receivables. The value of mortgage-backed

and asset-backed securities may be affected by changes in credit quality or value of the mortgage loans or other assets that support the securities. Mortgage-backed and asset-backed securities are subject to prepayment or call and extension risks. Some of these securities may receive little or no collateral protection from the underlying assets. Privately issued mortgage-backed and asset-backed securities are not traded on an exchange and may have a limited market. Without an active trading market, these securities may be particularly difficult to value given the complexities in valuing the underlying collateral. Unlike mortgage-related securities issued or guaranteed by the U.S. government or its agencies and instrumentalities, mortgage-related securities issued by private issuers do not have a government or government-sponsored entity guarantee (but may have other credit enhancement), and may, and frequently do, have less favorable collateral, credit risk or other characteristics. Privately issued mortgage-related securities are also not subject to the same underwriting requirements for the underlying mortgages that are applicable to those mortgage-related securities that have a government or government-sponsored entity guarantee.

**Fixed-Income Securities** – Risks of fixed-income securities include credit risk, interest rate risk, counterparty risk, prepayment risk, extension risk, valuation risk, and liquidity risk. The value of fixed-income securities may go up or down, sometimes rapidly and unpredictably, due to general market conditions, such as real or perceived adverse economic or political conditions, tariffs and trade disruptions, wars, social unrest, inflation, changes in interest rates, lack of liquidity in the bond markets or adverse investor sentiment. In addition, the value of a fixed-income security may decline if the issuer or other obligor of the security fails to pay principal and/or interest, otherwise defaults or has its credit rating downgraded or is perceived to be less creditworthy, or the credit quality or value of any underlying assets declines. If the value of fixed-income securities owned by the portfolio falls, the value of your investment will go down. The portfolio may lose its entire investment in the fixed-income securities of an issuer.

**Derivatives** – The use of derivatives involves a variety of risks, which may be different from, or greater than, the risks associated with investing in traditional securities, such as stocks and bonds. Risks of derivatives include leverage risk, liquidity risk, interest rate risk, valuation risk, market risk, counterparty risk and credit risk. Use of derivatives can increase portfolio losses, increase costs, reduce opportunities for gains, increase portfolio volatility, and not produce the result intended. Certain derivatives have the potential for unlimited loss, regardless of the size of the initial investment. Even a small investment in derivatives can have a disproportionate impact on the portfolio. Derivatives may be difficult or impossible to sell, unwind or value, and the counterparty (including, if applicable, the portfolio's clearing broker, the derivatives exchange or the clearinghouse) may default on its obligations to the portfolio. In certain cases, the portfolio may incur costs and may be hindered or delayed in enforcing its rights against or closing out derivatives instruments with a counterparty, which may result in additional losses. Derivatives are also generally subject to the risks applicable to the assets, rates, indices or other indicators underlying the derivative, including market risk, credit risk, liquidity risk, management risk and valuation risk. Also, suitable derivative transactions may not be available in all circumstances or at reasonable prices. The

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value of a derivative may fluctuate more or less than, or otherwise not correlate well with, the underlying assets, rates, indices or other indicators to which it relates. Using derivatives also subjects the portfolio to certain operational and legal risks. The portfolio may segregate cash or other liquid assets to cover the funding of its obligations under derivatives contracts or make margin payments when it takes positions in derivatives involving obligations to third parties. Rule 18f-4 under the 1940 Act provides a comprehensive regulatory framework for the use of derivatives by funds and imposes requirements and restrictions on portfolios using derivatives. Rule 18f-4 could have an adverse impact on the portfolio's performance and its ability to implement its investment strategies and may increase costs related to the portfolio's use of derivatives. The rule may affect the availability, liquidity or performance of derivatives, and may not effectively limit the risk of loss from derivatives.

**Counterparty** – The portfolio could lose money if the counterparties to derivatives, repurchase agreements and/or other financial contracts entered into for the portfolio do not fulfill their contractual obligations. In addition, the portfolio may incur costs and may be hindered or delayed in enforcing its rights against a counterparty. These risks may be greater to the extent the portfolio has more contractual exposure to a counterparty.

**Extension** – When interest rates rise, payments of fixed-income securities, including asset- and mortgage-backed securities, may occur more slowly than anticipated, causing their market prices to decline.

**Prepayment or Call** – Many issuers have a right to prepay their fixed-income securities. If this happens, the portfolio will not benefit from the rise in the market price of the securities that normally accompanies a decline in interest rates and may be forced to reinvest the prepayment proceeds in securities with lower yields.

**To Be Announced (TBA) Transactions** – Although the securities that are delivered in TBA transactions must meet certain standards, there is a risk that the actual securities received by the portfolio may be less favorable than what was anticipated when entering into the transaction. TBA transactions also involve the risk that a counterparty will fail to deliver the security, exposing the portfolio to further losses.

**Dollar Rolls –** The use of dollar rolls is a speculative technique involving leverage, and can have an economic effect similar to borrowing money. Dollar roll transactions involve the risk that the market value of the securities the portfolio is required to purchase may decline below the agreed upon repurchase price of those securities. If the broker/dealer to whom the portfolio sells securities becomes insolvent, the portfolio's ability to purchase or repurchase securities may be restricted.

**Management** – The value of your investment may go down if the investment manager's or sub-adviser's judgments and decisions are incorrect or otherwise do not produce the desired results, or if the investment strategy does not work as intended. You may also suffer losses if there are imperfections, errors or limitations in the quantitative, analytic or other tools, resources, information and data used, investment techniques applied, or the analyses employed or relied on, by the investment manager or sub-adviser, if such tools, resources, information or data are used incorrectly or otherwise do not work as intended, or if the investment manager's or sub-adviser's investment style is out of favor or otherwise fails

to produce the desired results. Any of these things could cause the portfolio to lose value or its results to lag relevant benchmarks or other funds with similar objectives.

**Active Trading** – The portfolio may engage in active trading of its portfolio. Active trading will increase transaction costs and could detract from performance. Active trading may be more pronounced during periods of market volatility.

**Bank Obligations –** Investments in bank obligations may expose the portfolio to adverse developments in or related to the banking industry. Banks are sensitive to changes in money market and general economic conditions. Banks are highly regulated. Decisions by regulators may limit the loans banks make, affect the interest rates and fees they charge and reduce bank profitability.

**Currency** – The value of a portfolio's investments in securities denominated in foreign currencies increases or decreases as the rates of exchange between those currencies and the U.S. dollar change. U.S. dollar-denominated securities of foreign issuers may also be affected by currency risk. Currency exchange rates can be volatile and may fluctuate significantly over short periods of time. Currency conversion costs and currency fluctuations could reduce or eliminate investment gains or add to investment losses. A portfolio may be unable or may choose not to hedge its foreign currency exposure or any hedge may not be effective.

**Cybersecurity** – Cybersecurity incidents, both intentional and unintentional, may allow an unauthorized party to gain access to portfolio assets, portfolio or shareholder data (including private shareholder information), or proprietary information, cause the portfolio or its service providers (including, but not limited to, the portfolio's investment manager, any sub-adviser(s), transfer agent, distributor, custodian, fund accounting agent and financial intermediaries) to suffer data breaches, data corruption or loss of operational functionality, or prevent portfolio investors from purchasing, redeeming or exchanging shares, receiving distributions or receiving timely information regarding the portfolio or their investment in the portfolio. Cybersecurity incidents may render records of portfolio assets and transactions, shareholder ownership of portfolio shares, and other data integral to the functioning of the portfolio inaccessible, inaccurate or incomplete. The use of artificial intelligence and machine learning could exacerbate these risks. Cybersecurity incidents may result in financial losses to the portfolio and its shareholders, and substantial costs may be incurred in order to prevent or mitigate any future cybersecurity incidents.

**Focused Investing –** To the extent the portfolio invests a significant portion of its assets in a limited number of countries, regions, sectors, industries or market segments, in a limited number of issuers, or in issuers in related businesses or that are subject to related operating risks, the portfolio will be more susceptible to negative events affecting those countries, regions, sectors, industries, segments or issuers, and the value of its shares may be more volatile than if it invested more widely.

**Foreign Investments** – Investing in securities of foreign issuers or issuers with significant exposure to foreign markets involves additional risks. Foreign markets can be less liquid, less regulated, less transparent and more volatile than U.S. markets. The value of the portfolio's foreign investments may decline, sometimes rapidly or unpredictably, because of factors affecting the particular issuer as well as foreign markets and issuers generally, such as unfavorable government actions, including nationalization, expropriation

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or confiscatory taxation, reduction of government or central bank support, tariffs and trade disruptions, sanctions, political or financial instability, social unrest or other adverse economic or political developments. Foreign investments may also be subject to different accounting practices and different regulatory, legal, auditing, financial reporting and recordkeeping standards and practices, and may be more difficult to value than investments in U.S. issuers. Certain foreign clearance and settlement procedures may result in an inability to execute transactions or delays in settlement.

**Hedging** – The portfolio may buy and sell futures contracts, put and call options, forward contracts and other instruments as a hedge. The portfolio's hedging strategies may not work as intended, and the portfolio may be in a less favorable position than if it had not used a hedging instrument.

**High-Yield Debt Securities** – High-yield debt securities, commonly referred to as "junk" bonds, are securities that are rated below "investment grade" or are of comparable quality. Changes in interest rates, the market's perception of the issuers, the creditworthiness of the issuers and negative perceptions of the junk bond market generally may significantly affect the value of these bonds. Junk bonds are considered speculative, tend to be volatile, typically have a higher risk of default, tend to be less liquid and more difficult to value than higher grade securities, and may result in losses for the portfolio.

**Inflation –** The value of assets or income from investment may be worth less in the future as inflation decreases the value of money. As inflation increases, the real value of the portfolio's assets can decline as can the value of the portfolio's distributions.

**Inflation-Protected Securities –** Inflation-protected debt securities may react differently from other types of debt securities and tend to react to changes in "real" interest rates, which represent nominal (stated) interest rates reduced by the expected impact of inflation. In general, the price of an inflation-protected debt security can fall when real interest rates rise, and can rise when real interest rates fall. Interest payments on inflation-protected debt securities can be unpredictable and will vary as the principal and/or interest is adjusted for inflation.

**Large Shareholder –** A significant portion of the portfolio's shares may be owned by one or more investment vehicles or institutional investors. Transactions by these large shareholders may be disruptive to the management of the portfolio. For example, the portfolio may experience large redemptions and could be required to sell securities at a time when it may not otherwise desire to do so. Such transactions may increase the portfolio's brokerage and/or other transaction costs. In addition, sizeable redemptions could cause the portfolio's total expenses to increase.

**Leveraging** – To the extent that the portfolio borrows or uses derivatives or other investments, such as ETFs, that have embedded leverage, your investment may be subject to heightened volatility, risk of loss and costs. Other risks also will be compounded because leverage generally magnifies the effect of a change in the value of an asset and creates a risk of loss of value on a larger pool of assets than the portfolio would otherwise have. Use of leverage may result in the loss of a substantial amount, and possibly all, of the portfolio's assets. The portfolio also may have to sell assets at inopportune times to satisfy its obligations.

**Liquidity** – The portfolio may make investments that are illiquid or that become illiquid after purchase. Illiquid investments can be difficult to value, may trade at a discount from comparable, more liquid investments, and may be subject to wide fluctuations in value. Liquidity risk may be magnified in rising interest rate or volatile environments. If the portfolio is forced to sell an illiquid investment to meet redemption requests or other cash needs, the portfolio may be forced to sell at a substantial loss or may not be able to sell at all. Liquidity of particular investments, or even entire asset classes, including U.S. Treasury securities, can deteriorate rapidly, particularly during times of market turmoil, and those investments may be difficult or impossible for the portfolio to sell. This may prevent the portfolio from limiting losses.

**Privately Placed and Other Restricted Securities** – Restricted securities, which include private placements of private and public companies, are subject to legal or contractual restrictions on their resale. Restricted securities may be difficult to sell at the time and price a portfolio prefers. Restricted securities may be difficult to value properly and may involve greater risks than securities that are not subject to restrictions on resale, both of which may result in substantial losses. An insufficient number of eligible buyers interested in purchasing restricted securities held by a portfolio could adversely affect the marketability of such securities and a portfolio might be unable to dispose of such securities promptly or at reasonable prices, adversely affecting a portfolio's overall liquidity and performance. Restricted securities may not be listed on an exchange and may have no active trading market. A portfolio may incur additional expense when disposing of restricted securities. Restricted securities may involve a high degree of business and financial risk and may result in substantial losses to the portfolio.

**Repurchase Agreements –** In a repurchase agreement, the portfolio purchases securities from a broker-dealer or a bank, called the counterparty, upon the agreement of the counterparty to repurchase the securities from the portfolio at a later date, and at a specified price. The securities purchased serve as the portfolio's collateral for the obligation of the counterparty to repurchase the securities. If the counterparty does not repurchase the securities, the portfolio is entitled to sell the securities, but the portfolio may not be able to sell them for the price at which they were purchased, thus causing a loss. If the counterparty becomes insolvent, there is some risk that the portfolio will not have a right to the securities, or the immediate right to sell the securities.

**Sovereign Debt –** Sovereign debt instruments are subject to the risk that the governmental entity may delay or fail to pay interest or repay principal on its sovereign debt. If a governmental entity defaults, it may ask for more time in which to pay or for further loans, or the debt may be restructured. There may be no established legal process for collecting sovereign debt that a government does not pay, nor are there bankruptcy proceedings through which all or part of the sovereign debt that a governmental entity has not repaid may be collected.

**Valuation** – Certain investments may be more difficult to value than other types of investments. The sales price the portfolio could receive for any particular portfolio investment may differ from the portfolio's valuation of the investment, particularly for securities that trade in thin or volatile markets, that are priced based upon valuations provided by third party pricing services, or that are valued using a fair value methodology. These differences may

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increase significantly and affect portfolio investments more broadly during periods of market volatility. Investors who purchase or redeem portfolio shares on days when the portfolio is holding fair-valued securities may receive fewer or more shares or lower or higher redemption proceeds than they would have received if the portfolio had not fair-valued securities or had used a different valuation methodology. The portfolio's ability to value its investments may also be impacted by technological issues and/or errors by pricing services or other third party service providers. Fair value pricing involves subjective judgment, which may prove to be incorrect.

**Zero Coupon Bonds –** Zero coupon bonds pay no interest during the life of the obligation but trade at prices below their stated maturity value. Although these securities lock in a rate of return to maturity, they may be subject to greater fluctuations in market value than securities that pay interest periodically.

**Performance:** The bar chart and the table below provide some indication of the risks of investing in the portfolio. The bar chart shows how the portfolio's performance has varied from year to year. The first index in the table shows how the portfolio's average annual total returns for different periods compare to the returns of a broad measure of market performance. One or more secondary indices that the manager believes more closely reflect the market sectors and/or types of investments in which the portfolio invests also are used to measure the portfolio's performance.

The performance calculations do not reflect any charges that are, or may be, imposed under your variable life insurance policy or variable annuity contract. If such charges were reflected, performance would be lower.

Absent any applicable fee waivers and/or expense limitations, performance would be lower.

As with all mutual funds, past performance is not a prediction of future results. Updated performance information is available on our website at www.transamerica.com/annuities-performance-center or by calling 1-800-851-9777.

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**Annual Total Returns (calendar years ended December 31) - Initial Class**

![](g29247ausgsvp.jpg)

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| | | |
|:---|:---|:---|
|  | **Quarter Ended** | **Return** |
| Best Quarter: | 3/31/2020 | 6.50% |
| Worst Quarter: | 3/31/2022 | -5.68% |

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**Average Annual Total Returns (periods ended December 31, 2025)** 

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| | | | | |
|:---|:---|:---|:---|:---|
|  | **1 Year** | **5 Years** | **10 Years** | **Inception**<br> **Date**<br>|
| Initial Class  | 5.85% | -1.28% | 1.18% | 5/13/1994 |
| Service Class  | 5.56% | -1.52% | 0.94% | &nbsp;&nbsp; 5/1/2003 |
| Bloomberg US Universal Bond Index <br> (reflects no deduction for fees, <br> expenses or taxes)<br>| 7.58% | 0.06% | 2.44% |  |
| Bloomberg US Government Index <br> (reflects no deduction for fees, <br> expenses or taxes)<br>| 6.31% | -0.94% | 1.38% |  |

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**Management:** 

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| | | |
|:---|:---|:---|
| *Investment Manager:* Transamerica Asset Management, Inc.<br> *Sub-Adviser:* Aegon USA Investment Management, LLC<br> *Portfolio Managers:* | *Investment Manager:* Transamerica Asset Management, Inc.<br> *Sub-Adviser:* Aegon USA Investment Management, LLC<br> *Portfolio Managers:* | *Investment Manager:* Transamerica Asset Management, Inc.<br> *Sub-Adviser:* Aegon USA Investment Management, LLC<br> *Portfolio Managers:* |
| Tyler A. Knight, CFA | Portfolio Manager | since May 2014 |
| Sivakumar N. Rajan | Portfolio Manager | since April 2021 |

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**Purchase and Sale of Portfolio Shares:** Shares of the portfolio may only be purchased or redeemed through variable life insurance policies and variable annuity contracts offered by the separate accounts of participating life insurance companies. Please refer to the corresponding prospectus of the policy or annuity contract that you have chosen for more information about the terms of the offering. Shares of the portfolio may also be sold to the asset allocation portfolios and to other funds of funds.

The portfolio does not have any initial or subsequent investment minimums. However, your insurance company may impose investment minimums.

The portfolio will not be charged and does not intend to pay any 12b-1 fees on Initial Class shares through May 1, 2027. The maximum 12b-1 fee on Initial Class shares is 0.15%. The portfolio reserves the right to pay such fees after that date.

**Tax Information:** Distributions made by the portfolio to an insurance company separate account, and exchanges and redemptions of portfolio shares made by the separate account, ordinarily do not cause the owners of insurance policies and annuity contracts invested in the separate account to recognize income or gain for federal income tax purposes. Please refer to the corresponding prospectus of the policy or annuity contract that you have chosen for more information regarding the tax consequences of your investment.

**Payments to Broker-Dealers and Other Financial Intermediaries:** The portfolio is generally only available as an underlying investment option for separate accounts of Transamerica life insurance companies to fund benefits under variable life insurance policies and variable annuity contracts. The portfolio and/or its affiliates may make payments to a Transamerica insurance company (or its affiliates) and to broker-dealers and other financial intermediaries for the sale of variable contracts (and thus, indirectly, the portfolio's shares) and related services. These payments may create a conflict of interest by influencing the Transamerica insurance company or other intermediary to recommend the variable contracts that invest in the portfolio. Ask your salesperson or visit your financial intermediary's website for more information.

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*In an effort to reduce paper mailings and conserve natural resources, we encourage you to visit our website, www.transamerica.com, to set up an account and enroll in eDelivery.*

SPST0526AUSGS

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