Summary Prospectus
May 1, 2025
SunAmerica Series Trust
SA Morgan Stanley International Equities 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 long-term capital appreciation.
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
0.84%
0.84%
0.84%
Service (12b-1) Fees
None
0.15%
0.25%
Other Expenses
0.07%
0.07%
0.07%
Total Annual Portfolio
Operating Expenses
Before Fee Waivers and/
or Expense
Reimbursements
0.91%
1.06%
1.16%
Fee Waivers and/or
Expense
Reimbursements1
0.05%
0.05%
0.05%
 
Class 1
Class 2
Class 3
Total Annual Portfolio
Operating Expenses
After Fee Waivers and/
or Expense
Reimbursements1
0.86%
1.01%
1.11%
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 on an annual basis with respect to the Portfolio so that the advisory fee rate payable by the Portfolio to SunAmerica is equal to 0.80% of the Portfolio’s average daily net assets on the first $250 million, 0.75% of the Portfolio’s average daily net assets on the next $250 million, and 0.70% of the Portfolio’s average daily net assets over $500 million. SunAmerica may not recoup any advisory fees waived with respect to the Portfolio pursuant to the Advisory Fee Waiver Agreement. 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
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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
$88
$285
$499
$1,115
Class 2
103
332
580
1,290
Class 3
113
364
634
1,405
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 54% of the average value of its portfolio.
Principal Investment Strategies of the Portfolio
The Portfolio seeks to maintain a diversified portfolio of equity securities of non-U.S. issuers based on fundamental analysis and individual stock selection. The Portfolio emphasizes a bottom-up approach to investing that seeks to identify attractive businesses that it believes are undervalued. The Portfolio focuses on developed markets, but may invest in emerging markets. Under normal market conditions, the Portfolio will hold investments in a number of different countries outside the United States.
In assessing investment opportunities, the Portfolio typically looks for both high quality companies with competitive advantages that have the potential to generate more resilient returns on capital, and value opportunities which may be more cyclical companies with reasonable or improving returns, trading at a sufficient discount. The subadviser believes that a portfolio consisting of both types of stocks, with the flexibility to adjust the mix between the two dependent on company valuation and prospects, has the potential to generate attractive long-term returns for investors.
The Portfolio’s investment process focuses on the sustainability and direction of a company’s long term returns. Environmental, social, and governance (“ESG”) considerations are a fundamental and integrated part of this process as the subadviser believes material weaknesses or opportunities in any of the ESG areas can potentially threaten or enhance the long-term
sustainability of a company’s returns on capital. The subadviser seeks to engage directly with company management teams to assess relevant factors material to long-term sustainable returns including ESG factors. Subject to the Portfolio’s investment objective, the adviser and/or subadviser retains discretion over which investments are selected. In exercising this discretion, ESG factors are not the sole determinant of whether an investment can be made or a holding can remain in the Portfolio’s portfolio, but instead the adviser and/or subadviser considers material risks or opportunities in any of the ESG areas which could threaten or enhance the long-term sustainability or direction of a company’s returns.
The Portfolio also seeks experienced company management teams that have a history of disciplined capital allocation. The Portfolio considers value criteria with an emphasis on cash flow-based metrics and seeks to determine the intrinsic value of the security. The Portfolio generally considers selling a portfolio holding when it determines that the holding has reached its intrinsic value target or if the investment thesis for the holding has deteriorated.
Under normal circumstances, at least 80% of the Portfolio’s assets will be invested in equity securities. The Portfolio’s equity investments may include convertible securities.
The Portfolio may, but it is not required to, use derivative instruments for a variety of purposes, including hedging, risk management, portfolio management or to earn income. The Portfolio’s use of derivatives may involve the purchase and sale of derivative instruments such as futures, options, swaps, contracts for difference and other related instruments and techniques. The Portfolio may utilize foreign currency forward exchange contracts, which are also derivatives, in connection with its investments in foreign securities to protect against uncertainty in the level of future foreign currency exchange rates or to gain or modify exposure to a particular currency. Derivative instruments used by the Portfolio will be counted toward the Portfolio’s 80% policy discussed above to the extent they have economic characteristics similar to the securities included within that policy.
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,
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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.
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.
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.
Equity Securities Risk. The Portfolio invests principally in equity securities and is therefore subject to the risk that stock prices will fall and may underperform other asset classes. Individual stock prices fluctuate from day-to-day and may decline significantly.
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.
Counterparty Risk. Counterparty risk is the risk that a counterparty to a security, loan or derivative held by the Portfolio becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties. The Portfolio may experience significant delays in obtaining any recovery in a bankruptcy or other reorganization proceeding, and there may be no recovery or limited recovery in such circumstances.
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.
Forward Currency Contracts Risk. A forward foreign currency contract or “currency forward” is an agreement between parties to exchange a specified amount of currency at a specified future time at a specified rate. Currency forwards are generally used to protect against uncertainty in the level of future exchange rates. Currency forwards do not eliminate fluctuations in the prices of the underlying securities a Portfolio owns or intends to acquire, but they do fix a rate of exchange in advance. Currency forwards limit the risk of loss due to a decline in the value of the hedged currencies, but at the same time they limit any potential gain that might result should the value of the currencies increase. The use of forward contracts involves the risk of mismatching the Portfolio’s objective under a forward contract with the value of securities denominated in a particular currency. Such transactions reduce or preclude the opportunity for gain if the value of the currency should move in the direction opposite to the position taken. There is an additional risk to the effect that currency contracts create exposure to currencies in which the Portfolio’s securities are not denominated. Unanticipated changes in currency prices may result in poorer overall performance for the Portfolio than if it had not entered into such contracts.
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Convertible Securities Risk. The values of the convertible securities in which the Portfolio may invest will be affected by market interest rates, the risk that the issuer may default on interest or principal payments and the value of the underlying common stock into which these securities may be converted. Specifically, certain types of convertible securities may pay fixed interest and dividends; their values may fall if market interest rates rise and rise if market interest rates fall. Additionally, an issuer may have the right to buy back or “call” certain of the convertible securities at a time unfavorable to the Portfolio.
Small- and Mid-Cap Companies Risk. Companies with smaller market capitalizations (particularly under $1 billion depending on the market) tend to be at early stages of development with limited product lines, operating histories, market access for products, financial resources, access to new capital, or depth in management. It may be difficult to obtain reliable information and financial data about these companies. Consequently, the securities of smaller companies may not be as readily marketable and may be subject to more abrupt or erratic market movements than companies with larger capitalizations. Securities of medium-sized companies are also subject to these risks to a lesser extent.
Value Investing Risk. The subadviser’s judgment that a particular security is undervalued in relation to the company’s fundamental economic value may prove incorrect.
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 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.
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.
Affiliated Fund Rebalancing Risk. The Portfolio may be an investment option for other mutual funds for which 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.
ESG Investment Risk. The Portfolio’s adherence to its ESG criteria and application of related analyses when selecting investments may impact the Portfolio’s performance, including relative to similar funds that do not adhere to such criteria or apply such analyses. Additionally, the Portfolio’s adherence to its ESG criteria and application of related analyses in connection with identifying and selecting investments may require subjective analysis and may be more difficult if data about
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a particular company or market is limited, such as with respect to issuers in emerging markets countries. The Portfolio may invest in companies that do not reflect the beliefs and values of any particular investor. Socially responsible norms differ by country and region, and a company’s ESG practices or the subadviser’s assessment of such may change over time. ESG characteristics may not be the only factors considered in selecting investments and as a result, the Portfolio’s investments may not have favorable ESG characteristics or high ESG ratings.
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 MSCI EAFE Index (net) (a broad-based securities market index), which is relevant to the Portfolio because it has characteristics similar to the Portfolio’s investment strategies. 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.
(Class 1 Shares)
During the period shown in the bar chart:
Highest Quarterly
Return:
December 31, 2022
18.44%
Lowest Quarterly
Return:
March 31, 2020
-19.96%
Year to Date Most
Recent Quarter:
March 31, 2025
5.70%
Average Annual Total Returns (For the periods ended December 31, 2024)
 
1
Year
5
Years
10
Years
Class 1 Shares
3.01%
3.74%
4.36%
Class 2 Shares
2.75%
3.57%
4.21%
Class 3 Shares
2.66%
3.49%
4.10%
MSCI EAFE Index (net)
3.82%
4.73%
5.20%
Investment Adviser
The Portfolio’s investment adviser is SunAmerica.
The Portfolio is subadvised by Morgan Stanley Investment Management Inc. (“MSIM Inc.”). MSIM Inc. has entered into an agreement whereby it may delegate certain of its investment advisory services to Morgan Stanley Investment Management Limited, an affiliated investment adviser.
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Portfolio Managers
Name and Title
Portfolio
Manager of the
Portfolio Since
William D. Lock
Managing Director of Morgan Stanley
Investment Management Limited
and Portfolio Manager
2014
Bruno Paulson
Managing Director of Morgan Stanley
Investment Management Limited
and Portfolio Manager
2014
Marcus Watson
Managing Director of Morgan Stanley
Investment Management Limited
and Portfolio Manager
2014
Nic Sochovsky
Managing Director of Morgan Stanley
Investment Management Limited
and Portfolio Manager
2016
Alex Gabriele
Managing Director of Morgan Stanley
Investment Management Limited
and Portfolio Manager
2017
Richard Perrott
Managing Director of Morgan Stanley
Investment Management Limited
and Portfolio Manager
2017
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 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.
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