Summary Prospectus
May 1, 2025
SunAmerica Series Trust
SA PIMCO Global Bond Opportunities Portfolio
(Class 1, Class 2 and Class 3 Shares)
SunAmerica Series Trust’s Statutory Prospectus and Statement of Additional Information, each dated May 1, 2025, as amended and supplemented from time to time, and the most recent shareholder reports are incorporated into and made part of this Summary Prospectus by reference. The Portfolio is offered only to the separate accounts of certain affiliated and unaffiliated life insurance companies and to other mutual funds. This Summary Prospectus is not intended for use by other investors.
Before you invest, you may want to review SunAmerica Series Trust’s Statutory Prospectus, which contains more information about the Portfolio and its risks. You can find the Statutory Prospectus and the above-incorporated information online at https://www.corebridgefinancial.com/getprospectus. You can also get this information at no cost by calling (800) 445-7862 or by sending an e-mail request to fundprospectus@corebridgefinancial.com.
The Securities and Exchange Commission has not approved or disapproved these securities, nor has it determined that this Summary Prospectus is accurate or complete. It is a criminal offense to state otherwise.
Investment Goal
The Portfolio’s investment goal is to seek maximum total return, consistent with preservation of capital.
Fees and Expenses of the Portfolio
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Portfolio. The table and the example below do not reflect the separate account fees charged in the variable annuity or variable life insurance policy (“Variable Contracts”) in which the Portfolio is offered. If separate account fees were shown, the Portfolio’s annual operating expenses would be higher. Please see your Variable Contract prospectus for more details on the separate account fees.
Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)  
 
 
Class 1
 
Class 2
 
Class 3
Management Fees
0.64
%
0.64
%
0.64
%
Service (12b-1) Fees
None
0.15
%
0.25
%
Other Expenses
0.37
%
0.36
%
0.37
%
Interest Expenses
0.18
%
0.18
%
0.18
%
Miscellaneous Other
Expenses
0.19
%
0.18
%
0.19
%
Total Annual Portfolio
Operating Expenses
1.01
%
1.15
%
1.26
%
Fee Waivers and/or
Expense
Reimbursements1
0.02
%
0.02
%
0.02
%
Total Annual Portfolio
Operating Expenses
After Fee Waivers and/
or Expense
Reimbursements1
0.99
%
1.13
%
1.24
%
1
Pursuant to an Advisory Fee Waiver Agreement, effective through April 30, 2026, SunAmerica Asset Management, LLC (“SunAmerica”) is contractually obligated to waive a portion of its advisory fee under the Investment Advisory and Management Agreement with respect to the Portfolio so that the advisory fee payable by the Portfolio is equal to 0.730% on the first $50 million, 0.630% on the next $100 million, 0.580% on the next $100 million and 0.530% thereafter. This agreement may be modified or discontinued prior to April 30, 2026 only with the approval of the Board of Trustees of SunAmerica Series Trust (the “Trust”), including a majority of the trustees who are not “interested persons” of the Trust as defined in the Investment
Company Act of 1940, as amended.
Expense 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 or hold all of your 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 (except that the Example incorporates any applicable fee waiver and/or expense limitation arrangements for only the first year). The Example does not reflect charges imposed by the Variable Contract. If the Variable Contract fees were reflected, the expenses would be higher. See the Variable Contract prospectus for information on such charges. Although your actual costs may be higher or lower, based on these assumptions and the net expenses shown in the fee table, your costs would be: 
 
1 Year
3 Years
5 Years
10 Years
Class 1
$101
$320
$556
$1,234
Class 2
115
363
631
1,396
Class 3
126
398
690
1,521
SunAmerica Series Trust
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SA PIMCO Global Bond Opportunities Portfolio
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’s portfolio turnover rate was 282% of the average value of its portfolio.
Principal Investment Strategies of the Portfolio
The Portfolio attempts to achieve its investment goal by investing, under normal circumstances, at least 80% of its net assets in Fixed Income Instruments and related forwards or derivatives such as options, futures contracts or swap agreements, with similar economic and risk characteristics. “Fixed Income Instruments” include: securities issued or guaranteed by the U.S. Government, its agencies or government-sponsored enterprises (“U.S. Government Securities”); corporate debt securities of U.S. and non-U.S. issuers, including convertible securities and corporate commercial paper; mortgage-backed and other asset-backed securities; inflation-indexed bonds issued both by governments and corporations; structured notes, including hybrid or “indexed” securities and event-linked bonds; bank capital and trust preferred securities; loan participations and assignments; delayed funding loans and revolving credit facilities; bank certificates of deposit, fixed time deposits and bankers’ acceptances; repurchase agreements on Fixed Income Instruments and reverse repurchase agreements on Fixed Income Instruments; debt securities issued by states or local governments and their agencies, authorities and other government-sponsored enterprises; obligations of non-U.S. governments or their subdivisions, agencies and government-sponsored enterprises; obligations of international agencies or supranational entities; and derivatives on Fixed Income Instruments.
The Portfolio invests primarily in investment grade debt investments, but may invest up to 20% of its total assets in high yield investments (“junk bonds”). The Portfolio may invest, without limitation, in derivative instruments, such as options, futures contracts or swap agreements. The Portfolio may purchase or sell securities on a when-issued, delayed delivery or forward commitment basis and may engage in short sales.
The Portfolio will invest in securities that are economically tied to at least three countries (one of which may be the United States), which may be represented by forwards or
derivatives such as options, futures contracts or swap agreements. The Portfolio normally invests at least 25% of its net assets in instruments that are economically tied to foreign (non-U.S.) countries. Securities may be denominated in major foreign currencies or the U.S. dollar. The Portfolio will normally hedge its foreign currency exposure (from non-U.S. dollar denominated securities or currencies) but may tactically seek foreign currency exposure up to 20% of its total assets.
The average portfolio duration normally varies between two and eight years. Duration is a measure of interest rate risk that indicates how price-sensitive a bond is to changes in interest rates. For example, a bond with a duration of three years will decrease in value by approximately 3% if interest rates increase by 1%. The Portfolio may also invest up to 10% of its total assets in preferred securities. The subadviser may engage in frequent and active trading of portfolio securities.
The Portfolio is non-diversified, which means that it may invest its assets in a smaller number of issuers than a diversified portfolio. The Portfolio, from time to time, may have significant investments in one or more countries or in particular sectors.
Principal Risks of Investing in the Portfolio
As with any mutual fund, there can be no assurance that the Portfolio’s investment goal will be met or that the net return on an investment in the Portfolio will exceed what could have been obtained through other investment or savings vehicles. Shares of the Portfolio are not bank deposits and are not guaranteed or insured by any bank, government entity or the Federal Deposit Insurance Corporation. If the value of the assets of the Portfolio goes down, you could lose money.
The following is a summary of the principal risks of investing in the Portfolio.
Active Trading Risk. The Portfolio may engage in frequent trading of securities to achieve its investment goal. Active trading may result in high portfolio turnover and correspondingly greater brokerage commissions and other transaction costs, which will be borne directly by the Portfolio and could affect its performance. During periods of increased market volatility, active trading may be more pronounced.
Bonds Risk. The value of your investment in the Portfolio may go up or down in response to changes in interest rates or defaults (or even the potential for future defaults) by bond issuers. Fixed income securities may be subject to volatility due to changes in interest rates.
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SA PIMCO Global Bond Opportunities Portfolio
Interest Rate Risk. Fixed income securities may be subject to volatility due to changes in interest rates. The value of fixed-income securities may decline when interest rates go up or increase when interest rates go down. The interest earned on fixed-income securities may decline when interest rates go down or increase when interest rates go up. Duration is a measure of interest rate risk that indicates how price-sensitive a bond is to changes in interest rates. Longer-term and lower coupon bonds tend to be more sensitive to changes in interest rates. For example, a bond with a duration of three years will decrease in value by approximately 3% if interest rates increase by 1%. Changing interest rates may have unpredictable effects on markets, may result in heightened market volatility, and could negatively impact the Portfolio’s performance. Any future changes in monetary policy made by central banks and/or their governments are likely to affect the level of interest rates.
Foreign Investment Risk. The Portfolio’s investments in the securities of foreign issuers or issuers with significant exposure to foreign markets involve additional risk. Foreign countries in which the Portfolio invests may have markets that are less liquid, less regulated and more volatile than U.S. markets. The value of the Portfolio’s investments may decline because of factors affecting the particular issuer as well as foreign markets and issuers generally, such as unfavorable government actions, and political or financial instability and other conditions or events (including, for example, military confrontations, war, terrorism, sanctions, disease/virus, outbreaks and epidemics). Lack of relevant data and reliable public information may also affect the value of these securities. The risks of foreign investments are heightened when investing in issuers in emerging market countries.
Foreign Sovereign Debt Risk. Foreign sovereign debt securities are subject to the risk that a governmental entity may delay or refuse to pay interest or to 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.
Junk Bonds Risk. The Portfolio may invest significantly in junk bonds, which are considered speculative. Junk bonds carry a substantial risk of default or changes in the issuer’s creditworthiness, or they may already be in default at the time of purchase.
Derivatives Risk. A derivative is any financial instrument whose value is based on, and determined by, another security, index, rate or benchmark (i.e., stock options, futures, caps, floors, etc.). To the extent a derivative contract is used to hedge another position in the Portfolio, the Portfolio will be exposed to the risks associated with hedging described below. To the extent an option, futures
contract, swap, or other derivative is used to enhance return, rather than as a hedge, the Portfolio will be directly exposed to the risks of the contract. Unfavorable changes in the value of the underlying security, index, rate or benchmark may cause sudden losses. Gains or losses from the Portfolio’s use of derivatives may be substantially greater than the amount of the Portfolio’s investment. Certain derivatives have the potential for undefined loss. Derivatives are also associated with various other risks, including market risk, leverage risk, hedging risk, counterparty risk, valuation risk, regulatory risk, illiquidity risk and interest rate fluctuations risk. The primary risks associated with the Portfolio’s use of derivatives are market risk, counterparty risk and hedging risk.
Hedging Risk. While hedging strategies can be very useful and inexpensive ways of reducing risk, they are sometimes ineffective due to unexpected changes in the market. Hedging also involves the risk that changes in the value of the related security will not match those of the instruments being hedged as expected, in which case any losses on the instruments being hedged may not be reduced. For gross currency hedges, there is an additional risk, to the extent that these transactions create exposure to currencies in which the Portfolio’s securities are not denominated.
Leverage Risk. The Portfolio may engage in certain transactions that may expose it to leverage risk, such as reverse repurchase agreements, loans of portfolio securities, and the use of when-issued, delayed delivery or forward commitment transactions and derivatives. The use of leverage may cause the Portfolio to liquidate portfolio positions at inopportune times in order to meet regulatory asset coverage requirements, fulfill leverage contract terms, or for other reasons. Leveraging, including borrowing, tends to increase the Portfolio’s exposure to market risk, interest rate risk or other risks, and thus may cause the Portfolio to be more volatile than if the Portfolio had not utilized leverage.
Emerging Markets Risk. Risks associated with investments in emerging markets may include: delays in settling portfolio securities transactions; currency and capital controls; greater sensitivity to interest rate changes; pervasive corruption and crime; exchange rate volatility; inflation, deflation or currency devaluation; violent military or political conflicts; confiscations and other government restrictions by the United States or other governments; and government instability. As a result, investments in emerging market securities tend to be more volatile than investments in developed countries.
Foreign Currency Risk. The value of the Portfolio’s foreign investments may fluctuate due to changes in
SunAmerica Series Trust
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SA PIMCO Global Bond Opportunities Portfolio
currency exchange rates. A decline in the value of foreign currencies relative to the U.S. dollar generally can be expected to depress the value of the Portfolio’s non-U.S. dollar-denominated securities.
Credit Risk. Credit risk applies to most debt securities, but is generally not a factor for obligations backed by the “full faith and credit” of the U.S. Government. The Portfolio could lose money if the issuer of a debt security is unable or perceived to be unable to pay interest or to repay principal when it becomes due.

An issuer with a lower credit rating will be more likely than a higher rated issuer to default or otherwise become unable to honor its financial obligations. Issuers with low credit ratings typically issue junk bonds. In addition to the risk of default, junk bonds may be more volatile, less liquid, more difficult to value and more susceptible to adverse economic conditions or investor perceptions than other bonds.
Non-Diversification Risk. The Portfolio is organized as a “non-diversified” fund. A non-diversified fund may invest a larger portion of assets in the securities of a single company than a diversified fund. By concentrating in a smaller number of issuers, the Portfolio’s risk may be increased because the effect of each security on the Portfolio’s performance is greater.
Call Risk. The risk that an issuer will exercise its right to pay principal on a debt obligation (such as a mortgage-backed security or convertible security) that is held by the Portfolio earlier than expected. This may happen when there is a decline in interest rates. Under these circumstances, the Portfolio may be unable to recoup all of its initial investment and will also suffer from having to reinvest in lower-yielding securities.
Management Risk. The Portfolio is subject to management risk because it is an actively-managed investment portfolio. The Portfolio’s portfolio managers apply investment techniques and risk analyses in making investment decisions, but there can be no guarantee that these decisions or the individual securities selected by the portfolio managers will produce the desired results.
Market Risk. The Portfolio’s share price or the market as a whole can decline for many reasons or be adversely affected by a number of factors, including, without limitation: weakness in the broad market, a particular industry, or specific holdings; adverse political, regulatory or economic developments in the United States or abroad; changes in investor psychology; heavy institutional selling; military confrontations, war, terrorism and other armed conflicts, disease/virus outbreaks and epidemics; recessions; taxation and international tax treaties;
currency, interest rate and price fluctuations; and other conditions or events. In addition, the subadviser’s assessment of securities held in the Portfolio may prove incorrect, resulting in losses or poor performance even in a rising market.
Mortgage- and Asset-Backed Securities Risk. The characteristics of mortgage-backed and asset-backed securities differ from traditional fixed income securities. Mortgage-backed securities are subject to “prepayment risk” and “extension risk.” Prepayment risk is the risk that, when interest rates fall, certain types of obligations will be paid off by the obligor more quickly than originally anticipated and the Portfolio may have to invest the proceeds in securities with lower yields. Extension risk is the risk that, when interest rates rise, certain obligations will be paid off by the obligor more slowly than anticipated, causing the value of these securities to fall. Small movements in interest rates (both increases and decreases) may quickly and significantly reduce the value of certain mortgage-backed and asset-backed securities. Mortgage-backed and asset-backed securities are also subject to credit risk.
Non-Hedging Foreign Currency Trading Risk. The Portfolio may engage in forward foreign currency transactions for speculative purposes. The Portfolio may purchase or sell foreign currencies through the use of forward contracts based on the subadviser’s judgment regarding the direction of the market for a particular foreign currency or currencies. In pursuing this strategy, the subadviser seeks to profit from anticipated movements in currency rates by establishing “long” and/or “short” positions in forward contracts on various foreign currencies. Foreign exchange rates can be extremely volatile and a variance in the degree of volatility of the market or in the direction of the market from the subadviser’s expectations may produce significant losses for the Portfolio. Some of the transactions may also be subject to interest rate risk.
Illiquidity Risk. An illiquid investment is any investment that the Portfolio reasonably expects cannot be sold or disposed of in current market conditions in seven calendar days or less without the sale or disposition significantly changing the market value of the investment. Illiquidity risk exists when particular investments are difficult to sell. Although most of the Portfolio’s investments must be liquid at the time of investment, investments may lack liquidity after purchase by the Portfolio, particularly during periods of market turmoil. When the Portfolio holds illiquid investments, its investments may be harder to value, especially in changing markets, and if the Portfolio is forced to sell these investments to meet redemption requests or for other cash needs, the Portfolio may suffer
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SA PIMCO Global Bond Opportunities Portfolio
a loss. In addition, when there is illiquidity in the market for certain investments, the Portfolio, due to limitations on illiquid investments, may be unable to achieve its desired level of exposure to a certain sector. When there is little or no active trading market for specific types of securities, it can become more difficult to sell the securities at or near their perceived value. In such a market, the value of such securities and the Portfolio’s share price may fall dramatically. Portfolios that invest in non-investment grade fixed income securities and emerging market country issuers will be especially subject to the risk that during certain periods, the liquidity of particular issuers or industries, or all securities within a particular investment category, will shrink or disappear suddenly and without warning as a  result of adverse economic, market or political events, or adverse investor perceptions.
Issuer Risk. The value of a security may decline for a number of reasons directly related to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods and services.
Sector Risk. Sector risk is the possibility that a certain sector may underperform other sectors or the market as a whole. As a Portfolio allocates more of its portfolio holdings to a particular sector, the Portfolio’s performance will be more susceptible to any economic, business or other developments which generally affect that sector.
Short Sales Risk. Short sales by the Portfolio involve certain risks and special considerations. Possible losses from short sales differ from losses that could be incurred from a purchase of a security, because losses from short sales are potentially unlimited, whereas losses from purchases can be no greater than the total amount invested.
When-Issued and Delayed Delivery Transactions Risk. When-issued and delayed delivery securities involve the risk that the security the Portfolio buys will lose value prior to its delivery. There also is the risk that the security will not be issued or that the other party to the transaction will not meet its obligation. If this occurs, the Portfolio may lose both the investment opportunity for the assets it set aside to pay for the security and any gain in the security’s price.
Preferred Stock Risk. Preferred stockholders’ liquidation rights are subordinate to the company’s debt holders and
creditors. If interest rates rise, the fixed dividend on preferred stocks may be less attractive and the price of preferred stocks may decline. Deferred dividend payments by an issuer of preferred stock could have adverse tax consequences for the Portfolio and may cause the preferred stock to lose substantial value.
Affiliated Fund Rebalancing Risk. The Portfolio may be an investment option for other mutual funds for which SunAmerica Asset Management, LLC (“SunAmerica”) serves as investment adviser that are managed as “funds of funds.” From time to time, the Portfolio may experience relatively large redemptions or investments due to the rebalancing of a fund of funds. In the event of such redemptions or investments, the Portfolio could be required to sell securities or to invest cash at a time when it is not advantageous to do so.
Performance Information
The following bar chart illustrates the risks of investing in the Portfolio by showing changes in the Portfolio’s performance from calendar year to calendar year and the table compares the Portfolio’s average annual returns to those of the Bloomberg Global Aggregate Index (a broad-based securities market index) and the Bloomberg Global Aggregate Index (USD-hedged), which is relevant to the Portfolio because it has characteristics similar to the Portfolio’s investment strategies. The Portfolio’s returns prior to April 29, 2024, as reflected in the bar chart and table, are the returns of the Portfolio when it followed different investment strategies under the name “SA Goldman Sachs Global Bond Portfolio.” Fees and expenses incurred at the contract level are not reflected in the bar chart or table. If these amounts were reflected, returns would be less than those shown. Of course, past performance is not necessarily an indication of how the Portfolio will perform in the future.
Effective April 29, 2024, Pacific Investment Management Company, LLC (“PIMCO”) replaced Goldman Sachs Asset Management International (“GSAM”) as subadviser to the Portfolio. Prior to April 29, 2024, GSAM served as subadviser.
SunAmerica Series Trust
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SA PIMCO Global Bond Opportunities Portfolio
(Class 1 Shares)
 
During the period shown in the bar chart: 
Highest Quarterly
Return:
December 31, 2023
8.69%
Lowest Quarterly
Return:
June 30, 2022
-9.32%
Year to Date Most
Recent Quarter:
March 31, 2025
2.62%
Average Annual Total Returns (For the periods ended December 31, 2024)  
 
1
Year
5
Years
10
Years
Class 1 Shares
-1.42%
-2.88%
-0.55%
Class 2 Shares
-1.50%
-3.04%
-0.70%
Class 3 Shares
-1.59%
-3.12%
-0.79%
Bloomberg Global Aggregate (reflects no
deduction for fees, expenses or taxes)
-1.69%
-1.96%
0.15%
Bloomberg Global Aggregate (hdg)
(reflects no deduction for fees,
expenses or taxes)
3.40%
0.48%
2.01%
Investment Adviser
The Portfolio’s investment adviser is SunAmerica.
The Portfolio is subadvised by PIMCO.
Portfolio Managers 
Name and Title
Portfolio
Manager of the
Portfolio Since
Andrew Balls
CIO Global Fixed Income, Managing
Director, Portfolio Manager and Head
of Global Specialists
2024
Sachin Gupta
Portfolio Manager, Managing Director
and Head of Global Desk
2024
Lorenzo Pagani
Managing Director, Portfolio Manager
and Head of European Rates Desk
2024
Purchases and Sales of Portfolio Shares
Shares of the Portfolios may only be purchased or redeemed through Variable Contracts offered by the separate accounts of participating life insurance companies and by other portfolios of the Trust and Seasons Series Trust. Shares of a Portfolio may be purchased and redeemed each day the New York Stock Exchange is open, at the Portfolio’s net asset value determined after receipt of a request in good order.
The Portfolios do not have any initial or subsequent investment minimums. However, your insurance company may impose investment or account minimums. Please consult the prospectus (or other offering document) for your Variable Contract which may contain additional information about purchases and redemptions of Portfolio shares.
Tax Information
The Portfolios will not be subject to U.S. federal income tax so long as they qualify as regulated investment companies and distribute their income and gains each year to their shareholders. However, contractholders may be subject to U.S. federal income tax (and a U.S. federal Medicare tax
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SA PIMCO Global Bond Opportunities Portfolio
of 3.8% that applies to net investment income, including taxable annuity payments, if applicable) upon withdrawal from a Variable Contract. Contractholders should consult the prospectus (or other offering document) for the Variable Contract for additional information regarding taxation.
Payments to Broker-Dealers and
Other Financial Intermediaries
The Portfolios are not sold directly to the general public but instead are offered as an underlying investment option for Variable Contracts and to other portfolios of the Trust and
Seasons Series Trust. A Portfolio and its related companies may make payments to the sponsoring insurance company (or its affiliates) for distribution and/or other services. These payments may create a conflict of interest as they may be a factor that the insurance company considers in including a Portfolio as an underlying investment option in the Variable Contract. The prospectus (or other offering document) for your Variable Contract may contain additional information about these payments.
SunAmerica Series Trust
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CSP-86703T_600_386_378.9 (4/25)
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