Preliminary Proxy Statement (Form PRE 14A)

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934 (Amendment No. [●])

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

SEASONS SERIES TRUST

SUNAMERICA SERIES TRUST

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

SEASONS SERIES TRUST

SUNAMERICA SERIES TRUST

5300 Memorial Drive, Suite 1150

Houston, TX 77007

[●], 2026

Dear Contract Owner:

The Board of Trustees (the "Board" and the members of which are referred to as "Trustees") of each of Seasons Series Trust ("SST") and SunAmerica Series Trust ("SAST" and together with SST, the "Trusts" and each, a "Trust") is pleased to invite you to a joint special meeting (the "Special Meeting") of the shareholders of each portfolio organized as a series of the Trusts (each, a "Portfolio" and collectively, the "Portfolios") to be held on Tuesday, November 24, 2026, at 11:00 a.m. Eastern Time. The Special Meeting will be held in a virtual meeting format only. You will not be able to attend the Special Meeting in person, but you will be able to view the Special Meeting live and provide your voting instructions or cast your vote(s), as applicable, by accessing an event link.

Although you are not directly a shareholder of any Portfolio, as the owner of a variable annuity contract or a variable life insurance policy (a "Variable Contract") issued by the separate accounts of American General Life Insurance Company, The United States Life Insurance Company in the City of New York, The Variable Annuity Life Insurance Company or Nassau Life Insurance Company (collectively, the "Life Companies"), you have the right to instruct the Life Companies how to vote shares of the Portfolio(s) that are attributable to your Variable Contract at the Special Meeting.

SunAmerica Asset Management, LLC ("SunAmerica") serves as the investment adviser for each Portfolio.

At the Special Meeting, shareholders will be asked to consider and vote on the following proposals:

As an owner of a Variable Contract who indirectly invests in one or more of the Portfolios, you are being asked to provide voting instructions on each applicable proposal. The Board of each Trust has determined that each of the proposals is in the best interests of the Trust and each Portfolio to which it applies, its shareholders and owners of Variable Contracts such as you and unanimously recommends that you vote in favor of each proposal relating to your Portfolio(s).

SunAmerica has attached a "Questions & Answers" section to assist you in evaluating each proposal. We encourage you to review the enclosed materials carefully. You may vote prior to the Special Meeting in one of the following ways:

You may also vote during the Special Meeting by following the instructions that will be available on the Special Meeting website during the Special Meeting.

As always, we appreciate your support.

TABLE OF CONTENTS

OVERVIEW OF THE PROPOSALS - QUESTIONS & ANSWERS

The following questions and answers provide an overview of the proposals on which you are being asked to vote. The accompanying proxy statement (the "Proxy Statement") contains more detailed information, and we encourage you to read it in its entirety before voting. Your vote is important.

For convenience, we refer to Contract Owners as "shareholders." Additionally, any reference to Contract Owners owning "shares" of a Portfolio refers to owning accumulation units of the subaccount that invests in such Portfolio.

PROPOSAL 1: TO ELECT TEN (10) TRUSTEES TO THE BOARDS OF EACH TRUST EFFECTIVE JANUARY 1, 2027

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PROPOSAL 2: TO APPROVE A CHANGE IN SUB-CLASSIFICATION FROM DIVERSIFIED TO NON-DIVERIFIED OF EACH OF THE SA AB GROWTH PORTFOLIO, SA FRANKLIN SYSTEMATIC U.S. LARGE CAP CORE PORTFOLIO, SA JPMORGAN EMERGING MARKETS PORTFOLIO, SA JPMORGAN LARGE CAP CORE PORTFOLIO, AND SA WELLINGTON CAPITAL APPRECIATION PORTFOLIO, EACH A SERIES OF SAST.

Each of the Portfolios has seen their benchmark indices become more concentrated over time. Over the past several months, certain stocks contained in each Portfolio's benchmark have experienced increases in their market capitalizations. A Portfolio's benchmark index is not limited by the 1940 Act diversification requirement. As a result, the benchmark indices have become much more concentrated at the individual stock level. This level of index concentration coupled with the limitations placed on a diversified investment company can, at times, constrain a Portfolio's ability to fully achieve target exposures to individual securities. The current diversified status of each Portfolio limits its ability to invest above 5% in certain issuers and could require a Portfolio to be underweight at least some of the top holdings in its benchmark, even if the Portfolio management team finds them to be attractive investment opportunities. This limitation can ultimately inhibit the opportunity for a Portfolio to implement its principal investment strategy and can hinder its ability to outperform its benchmark.

VOTING PROCEDURES

Each Board believes that approval of each proposal is in the best interests of its respective Trust and Portfolios, as well as being in the best interests of shareholders.

Shares of certain Portfolios are held by other Portfolios that are operated as "funds-of-funds" under the 1940 Act. The Portfolios that are "funds-of-funds" do not pass through the voting rights with respect to their underlying Portfolios through to the contract holders that own their shares. Those Portfolios will vote their shares of the underlying Portfolios according to their own proxy voting policies.

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You can authorize a proxy to vote your shares by (1) using the telephone or Internet as described on your proxy card or voting instruction card, or (2) completing and signing the enclosed proxy card or voting instruction card and mailing it in the enclosed postage-paid envelope, or you can vote during the Special Meeting by following the instructions that will be available on the Special Meeting website during the Special Meeting.

The Special Meeting will be held in a virtual meeting format only. You will not be able to attend the Special Meeting in person, but you will be able to view the Special Meeting live and cast your vote(s) or provide voting instructions by accessing a unique event link that will be provided to you prior to the Special Meeting. To register to attend the virtual meeting, please send an email to the proxy solicitor, EQ, at [email protected]. Please include "Venerable Funds" in the subject line and provide your control number located on your proxy card/voting instruction card, your full name, and your email address. Requests for registration must be received no later than 12:00 p.m. Eastern Time, on Monday November 23, 2026. Upon completion of the registration process, you will receive a confirmation of your registration via email. On the day of the Special Meeting, you will receive an email with your unique Special Meeting attendance link. Further instructions to access the Special Meeting and to vote your shares, if you have not already done so, will be included in the email.

For shareholders who own shares through a Variable Contract, no matter how large or small your holdings may be, your vote counts, since the Life Companies will vote Portfolio shares in the same proportions as the instructions received from all Contract Owners with assets invested in the Portfolio. Shares for which the Life Companies receive either no timely voting instructions or an unsigned voting instruction card from a Contract Owner will be voted by the Life Companies as for, against, or abstain, in the same proportion as the shares for which voting instructions were received from Contract Owners, even if only a small number of Contract Owners provide voting instructions. The effect of proportional voting is that if a large number of Contract Owners fail to give voting instructions, a small number of Contract Owners may determine the outcome of the vote.

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IF VOTING BY MAIL

INSTRUCTIONS FOR SIGNING VOTING INSTRUCTION CARDS OR PROXY CARDS

The following general rules for signing voting instruction cards or proxy cards may be of assistance to you.

Important additional information about the proposals is set forth in the accompanying Proxy Statement.

Please read it carefully.

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SEASONS SERIES TRUST

SUNAMERICA SERIES TRUST

5300 Memorial Drive, Suite 1150

Houston, TX 77007

(800) 445-7862

NOTICE OF JOINT SPECIAL MEETING OF SHAREHOLDERS

TO BE HELD ON [●]

NOTICE IS HEREBY GIVEN that a joint special meeting (the "Special Meeting") of the shareholders of each of the various investment portfolios listed below (each, a "Portfolio" and collectively, the "Portfolios") will be held on [●], at [●] Eastern Time. The Special Meeting will be held in a virtual meeting format only. You will not be able to attend the Special Meeting in person, but you will be able to view the Special Meeting live and cast your vote(s) or provide voting instructions by accessing an event link, as detailed below.

SunAmerica Asset Management, LLC ("SunAmerica") serves as the investment adviser for each Portfolio.

The Special Meeting is being held to consider and vote on the following proposals:

The Board of each Trust has fixed the close of business on September 4, 2026 (the "Record Date") as the record date for determination of shareholders of each relevant Portfolio entitled to notice of, and to vote at, the Special Meeting and any postponements and adjournments thereof.

The Special Meeting will be held in a virtual meeting format only. You will not be able to attend the Special Meeting in person, but you will be able to view the Special Meeting live and cast your vote(s) or provide voting instructions by accessing an event link. To register to attend the virtual meeting, please send an email to the proxy solicitor, EQ, at [email protected]. Please include "Venerable Funds" in the subject line and provide your control number located on your proxy card/voting instruction card, your full name, and your email address. Requests for registration must be received no later than 12:00 p.m. Eastern Time, on Monday November 23, 2026. Upon completion of the registration process, you will receive a confirmation of your registration via email. On the day of the Special Meeting, you will receive an email with your unique Special Meeting attendance link. Further instructions to access the Special Meeting and to vote your shares, if you have not already done so, will be included in the email.

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Although you are not directly a shareholder of the Portfolios, as the owner of a variable annuity contract or a variable life insurance policy (a "Variable Contract") issued by the separate accounts (the "Separate Accounts") of American General Life Insurance Company, The United States Life Insurance Company in the City of New York, The Variable Annuity Life Insurance Company or Nassau Life Insurance Company (collectively, the "Life Companies" and each, a "Life Company"), you have the right to instruct the Life Companies how to vote shares of the Portfolio(s) that are attributable to your Variable Contract at the Special Meeting of shareholders. The Life Companies, through the Separate Accounts, are the record owners of the Portfolios' shares and will vote the shares of the Portfolios at the Special Meeting. The rights accompanying shares of the Portfolios are legally vested in the Variable Contracts offered by the Separate Accounts. However, in accordance with current law and interpretations thereof, the Life Companies will vote shares held in the Separate Accounts for which voting instructions are timely received from the holders of the Variable Contracts in a manner consistent with those instructions. A signed voting instruction form by a holder that does not specify how the holder's shares should be voted on a proposal may be deemed an instruction to vote such shares in favor of the proposal. Those persons who have a voting interest at the close of business on the Record Date will be entitled to submit instructions to their Life Company. Each Life Company will vote Portfolio shares held in Separate Accounts for which no timely instructions or signed voting instruction forms are received from the holders of the Variable Contracts, as well as shares the Life Company owns, in the same proportion as those shares for which such Life Company receives voting instructions. This practice is commonly referred to as "echo voting." Certain Portfolios that are operated as "funds-of-funds" also hold shares of other Portfolios and will vote their shares of the underlying Portfolios according to their own proxy voting policies.

A Proxy Statement is attached to this Notice that describes the proposals to be voted upon at the Special Meeting and any postponements and adjournments thereof. For purposes of the enclosed Proxy Statement, the term "shareholder" (when used to refer to the beneficial holder of ownership interests in a Portfolio) shall also be deemed to include holders of the Variable Contract.

Your vote is important regardless of the size of your holdings in the Portfolio(s). Whether or not you expect to be present at the Special Meeting virtually, please complete and sign the enclosed proxy card or voting instruction card and return it promptly in the enclosed postage-paid envelope. You may also vote by telephone or over the Internet; please see pages [●] of the enclosed Proxy Statement for details. If you vote by proxy and then desire to change your vote or vote at the Special Meeting, you may revoke your proxy at any time prior to its exercise at the Special Meeting. Please refer to the section of the enclosed Proxy Statement entitled "Voting Information" for more information.

Important Notice Regarding the Availability of Proxy Materials for the Special Meeting: This notice and the accompanying Proxy Statement are available on the Internet at https://vote.proxyonline.com/Venerable/docs/proxy2026.

THE BOARD OF EACH TRUST UNANIMOUSLY RECOMMENDS THAT YOU VOTE "FOR" EACH OF THE PROPOSALS WITH RESPECT TO YOUR PORTFOLIO(S), AS APPLICABLE.

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Portfolios Holding Joint Special Meeting of Shareholders on [●]

Seasons Series Trust

SunAmerica Series Trust

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SEASONS SERIES TRUST

SUNAMERICA SERIES TRUST

5300 Memorial Drive, Suite 1150

Houston, TX 77007

(800) 445-7862

JOINT PROXY STATEMENT

This joint proxy statement (the "Proxy Statement") is being furnished on behalf of the Boards of Trustees (each, a "Board" and together, the "Boards" and the members of which are referred to as "Trustees") of each of Seasons Series Trust ("SST") and SunAmerica Series Trust ("SAST" and together with SST, the "Trusts" and each, a "Trust") in connection with the joint special meeting (the "Special Meeting") of shareholders of each of the various investment portfolios of the Trusts listed in the accompanying Notice of Joint Special Meeting of Shareholders (each, a "Portfolio" and collectively, the "Portfolios") to be held on [●], at [●] Eastern Time. The Special Meeting will be held in a virtual meeting format only. You will not be able to attend the Special Meeting in person, but you will be able to view the Special Meeting live and cast your vote(s) or provide voting instructions by accessing an event link.

Shareholders of record of each Portfolio at the close of business on September 4, 2026 (the "Record Date") are entitled to notice of, and to vote at, the Special Meeting and any postponements and adjournments thereof. This Proxy Statement, proxy card/voting instruction card and accompanying Notice of Joint Special Meeting of Shareholders are being mailed to shareholders of each Portfolio on or about [●]. Each Board requests that shareholders vote their shares by completing and returning the enclosed proxy card or voting instruction card.

To register to attend the virtual meeting, please send an email to the proxy solicitor, EQ, at [email protected]. Please include "Venerable Funds" in the subject line and provide your control number located on your proxy card/voting instruction card, your full name, and your email address. Requests for registration must be received no later than 12:00 p.m. Eastern Time, on Monday November 23, 2026. Upon completion of the registration process, you will receive a confirmation of your registration via email. On the day of the Special Meeting, you will receive an email with your unique Special Meeting attendance link. Further instructions to access the Special Meeting and to vote your shares, if you have not already done so, will be included in the email. You may vote during the Special Meeting.

The purpose of the Special Meeting is for shareholders to consider and vote on the proposals affecting the Portfolios listed below and as more fully described herein (not all proposals apply to each Portfolio).

SunAmerica Asset Management, LLC ("SunAmerica") serves as the investment adviser for each Portfolio.

The Special Meeting is being held to consider and vote on the following proposals:

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Although you are not directly a shareholder of the Portfolios, as the owner of a variable annuity contract or a variable life insurance policy (a "Variable Contract") issued by the separate accounts (the "Separate Accounts") of American General Life Insurance Company, The United States Life Insurance Company in the City of New York, The Variable Annuity Life Insurance Company or Nassau Life Insurance Company (collectively, the "Life Companies" and each, a "Life Company"), you have the right to instruct the Life Companies how to vote shares of the Portfolio(s) that are attributable to your Variable Contract at the Special Meeting. The Life Companies, through the Separate Accounts, are the record owners of the Portfolios' shares and will vote the shares of the Portfolios at the Special Meeting. The rights accompanying shares of the Portfolios are legally vested in the Variable Contracts offered by the Separate Accounts. However, in accordance with current law and interpretations thereof, the Life Companies will vote shares held in the Separate Accounts for which voting instructions are timely received from the holders of the Variable Contracts in a manner consistent with those instructions. A signed voting instruction form by a holder that does not specify how the holder's shares should be voted on a proposal may be deemed an instruction to vote such shares in favor of the proposal. Those persons who have a voting interest at the close of business on the Record Date will be entitled to submit instructions to their Life Company. Each Life Company will vote Portfolio shares held in Separate Accounts for which no timely instructions or signed voting instruction forms are received from the holders of the Variable Contracts, as well as shares the Life Company owns, in the same proportion as those shares for which such Life Company receives voting instructions. This practice is commonly referred to as "echo voting." Certain Portfolios that are operated as "funds-of-funds" also hold shares of other Portfolios and will vote their shares of the underlying Portfolios according to their own proxy voting policies.

For ease of reference, throughout this Proxy Statement, the term "shareholder" (when used to refer to the beneficial holder of ownership interests in a Portfolio) shall also be deemed to include holders of the Variable Contract.

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SUMMARY OF PROPOSALS AND PORTFOLIOS VOTING

The following chart shows the proposals that shareholders of each of the Portfolios will be asked to vote on at the Special Meeting.

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* SA American Funds® Asset Allocation Portfolio, SA American Funds® Global Growth Portfolio, SA American Funds® Growth Portfolio, SA American Funds® Growth-Income Portfolio, and SA American Funds® VCP Managed Allocation Portfolio are collectively referred to herein as the "SAST Master Feeder Portfolios."

** SA Goldman Sachs Government and Quality Bond Portfolio, SA Wellington Capital Appreciation Portfolio, and SA Wellington Strategic Multi-Asset Portfolio are collectively referred to herein as the "SAST 12/31 Portfolios."

Copies of each Portfolio's most recent Annual Report and Semi-Annual Report to shareholders will be furnished without charge upon request by writing to Seasons Series Trust or SunAmerica Series Trust, as applicable, at 5300 Memorial Drive, Suite 1150, Houston, Texas 77007, or by calling 1-800-445-7862.

Important Notice Regarding the Availability of Proxy Materials for the Joint Special Meeting of Shareholders to be held on [●]:

This Proxy Statement is available on the Internet at https://vote.proxyonline.com/Venerable/docs/proxy2026. Any additional solicitation materials sent to shareholders will be made available at the same website.

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PROPOSAL 1

ELECTION OF TRUSTEES

SHAREHOLDERS OF ALL PORTFOLIOS OF A TRUST VOTING TOGETHER

Background

Each Board currently consists of eight (8) Trustees. Six (6) of the current Trustees are "Independent Trustees," meaning they are not "interested persons" (as that term is defined in Section 2(a)(19) of the Investment Company Act of 1940 (the "1940 Act")) of the Trusts and SunAmerica. Two (2) of the current Trustees are "Interested Trustees," meaning they are deemed "interested persons" of the Trusts due to their positions with SunAmerica and its affiliates.

Each Board is presenting for election the following ten (10) nominees, effective January 1, 2027: Sherilyn Anderson, Tracey C. Doi, John T. Genoy, Christianne F. Kerns, Michal Levy, Jane Mancini, Charles H. Self III, Julian Sluyters, Martha B. Willis and Bonnie Wongtrakcool.

Mses. Anderson, Mancini and Wongtrakcool and Mr. Sluyters would be new Independent Trustees. The other Trustee nominees currently serve as Trustees and would continue to serve as Trustees.

Mses. Doi and Willis and Mr. Self, as well as Ms. Jane Jelenko and Mr. Bruce Willison, are Independent Trustees who were elected to the Boards by the applicable Trust's shareholders on January 19, 2023. Ms. Kerns is an Independent Trustee who was appointed to the Boards on October 12, 2023. Mr. Genoy is an Interested Trustee who was elected to the Boards by the applicable Trust's shareholders on January 19, 2023. Mr. Levy is an Interested Trustee who was appointed to the Boards on June 4, 2026.

Ms. Jelenko and Mr. Willison, who currently serve as Independent Trustees, are scheduled to retire at the end of this year in accordance with the Trusts' Independent Trustee Retirement Policy and are not standing for reelection.

Each nominee has consented to serving as a Trustee of the Trusts if elected and has also consented to being named in this Proxy Statement. If all Trustee nominees are elected, each Board will be comprised of ten (10) Trustees, eight (8) of whom will be Independent Trustees, effective January 1, 2027. Trustees serve until their successors are duly elected, qualified and serving, or until their resignation, retirement, removal, incapacity or death.

Proposal 1 is asking shareholders of the Trusts to elect the nominees as Trustees so that all members of the Boards will have been elected by the Trusts' shareholders. The 1940 Act requires that immediately after any vacancy on a registered investment company's board of directors is filled (in a manner other than election by shareholders), at least two-thirds of the directors then holding office have been elected by the fund's shareholders. The 1940 Act also provides that, in the event that at any time less than a majority of the directors of a fund are elected by shareholders, a shareholder meeting must be held as promptly as possible for the purpose of electing directors to fill any vacancies. If the nominees are elected by shareholders at the Special Meeting, then in the event of any future vacancies, the remaining Trustees may appoint additional Board members, subject to the requirements of the 1940 Act.

In addition to the foregoing, in order to rely on certain exemptive rules promulgated by the U.S. Securities and Exchange Commission (the "SEC"), the Trusts must comply with certain requirements, including the requirement that a majority of the Trustees on each Board be Independent Trustees. The Boards believe that it is in the best interests of the Trusts and their Portfolios' shareholders, including owners of Variable Contracts indirectly invested in the Portfolios of the Trusts, to be able to rely on such exemptive rules. The Boards also believe that good governance practices involve having a majority of their members be Independent Trustees.

Information Regarding the Nominees

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The following table lists the nominees for Trustee, their ages, current position(s) held with the Trusts, length of time served, principal occupations during the past five years, number of funds overseen within the Fund Complex and other directorships/trusteeships held outside of the Fund Complex. The nominees include the current Trustees of the Trusts and four (4) additional nominees, as indicated in the table. The Nomination and Governance Committee (the "Nomination Committee") of the Board of each Trust has evaluated the qualifications of, and nominated, each Trustee nominee for Board approval, and the Board has approved and recommended shareholder approval of each Trustee nominee. Martha B. Willis serves as the Chair of each Board. Unless otherwise noted, the address of each Trustee is 5300 Memorial Drive, Suite 1150, Houston, TX 77007. Information about the officers of the Trusts is provided in Exhibit A.

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Boards' Consideration of Each Nominee's Qualifications, Experience, Attributes or Skills

The Board of each Trust believes that the significance of each nominee's experience, qualifications, attributes or skills is an individual matter (meaning that experience or knowledge that is important for one nominee may not have the same value for another) and that these factors are best evaluated at the Board level, with no single factor being a controlling factor. Among the attributes common to all nominees are their ability to review critically, evaluate, question and discuss information provided to them, to interact effectively with the other Trustees (in the case of nominees who currently serve as Trustees), SunAmerica, sub-advisers, other service providers, legal counsel and the independent registered public accounting firm, and to exercise effective business judgment in the performance of their duties as Trustees. A nominee's ability to perform his or her duties effectively may have been attained through the nominee's executive, business, consulting, public service and/or academic positions; experience from service as a Trustee of the Trusts (in the case of nominees who currently serve as Trustees) and the other funds in the Fund Complex (and/or in other capacities), other investment funds, public companies or non-profit entities or other organizations; educational background or professional training; and/or other life experiences.

Additional information about each Trustee and the four additional nominees is set forth below, which supplements the information provided in the tables above and describes some of the specific experiences, qualifications, attributes or skills that each nominee possesses that the Board of each Trust believes prepares such nominee to be an effective Trustee.

Independent Trustees

Martha B. Willis. Ms. Willis has served as a Trustee since 2023 and as Chair of the Board since December 10, 2025. She has over 40 years of experience in the financial services industry, including serving as Executive Vice President and Chief Marketing Officer of TIAA and Nuveen from 2016 to 2022, where she led enterprise marketing, branding and corporate communications across TIAA Retirement, TIAA Bank and Nuveen. She served as a director and chair of Nuveen's UCITS funds from 2019 to 2021. She previously served as Chief Marketing Officer of Oppenheimer Funds from 2009 to 2016.

Sherilyn Anderson. Ms. Anderson was nominated in 2026 to serve as a Trustee of the Trusts starting on January 1, 2027. Ms. Anderson has a background in the financial services industry, has held senior management positions with asset management companies, and has multiple years of service on the boards of public and private

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companies and organizations. She currently serves as an Independent Trustee on the board of Venerable Variable Insurance Trust, an affiliate of the Trusts.

Tracey C. Doi. Ms. Doi has served as a Trustee since 2021. She retired as Chief Financial Officer and Group Vice President of Toyota Motor North America. She currently serves on the board of Pentair plc and Quest Diagnostics. Previously she served on the board of City National Bank. Ms. Doi has extensive executive experience, including in corporate finance, general management, strategic planning, operations, risk, cybersecurity and technology with a multinational corporation operating in a complex, highly regulated industry.

Christianne F. Kerns. Ms. Kerns has served as a Trustee since 2023. She has over 30 years of legal practice focusing on a broad range of corporate legal and business matters, including financing, commercial real estate, and structuring and negotiating complex business arrangements. She has significant corporate governance expertise and regularly advises boards and chief executive officers regarding management issues and initiatives, fiduciary duties and conflicts of interest.

Jane Mancini. Ms. Mancini was nominated in 2026 to serve as a Trustee of the Trusts starting on January 1, 2027. Ms. Mancini has nearly 40 years of experience in the investment management industry, with substantial experience in distribution and marketing activities of investment management products and services.

Charles H. Self III. Mr. Self has served as a Trustee since 2021. He has over 30 years of experience in the investment management industry, including serving as Chief Operating Officer, Chief Compliance Officer and Chief Investment Officer of an investment management firm.

Julian Sluyters. Mr. Sluyters was nominated in 2026 to serve as a Trustee of the Trusts starting on January 1, 2027. Mr. Sluyters has a background in the financial services industry, has held senior management positions with asset management companies, and has multiple years of service on the boards of other registered investment companies. He currently serves as an Independent Trustee on the board of Venerable Variable Insurance Trust, an affiliate of the Trusts.

Bonnie Wongtrakcool. Ms. Wongtrakcool was nominated in 2026 to serve as a Trustee of the Trusts starting on January 1, 2027. Ms. Wongtrakcool has many years of experience in the investment management industry, with substantial experience as a portfolio manager for fixed-income strategies and experience with sustainable investing.

The Board has adopted an Independent Trustee Retirement Policy under which Independent Trustees retire from service at the end of the calendar year in which he or she turns 78 years of age. Exceptions may be made for temporary transition periods, as approved by the Board and agreed to by the retiring Independent Trustee.

Interested Trustees

John T. Genoy. Mr. Genoy has served as a Trustee since 2021, and as President of the Trusts since 2007. He currently serves as Chief Operating Officer of SunAmerica (2006-Present). He has also served as President of SunAmerica from 2021-2026, as well as Chief Financial Officer and Director (2002-2021) and Senior Vice President (2003-2021). He also served as Chairman of AIG Federal Savings Bank (2013-2023). He joined SunAmerica in 1995. Prior to joining SunAmerica, he was a member of the financial services group at PricewaterhouseCoopers LLP. Mr. Genoy received a B.S. in Accounting from Villanova University and is a Certified Public Accountant.

Michal Levy. Ms. Levy has served as a Trustee since 2026, as well as President of SunAmerica since 2026. She has a background in the financial services industry, senior management experience with a registered investment adviser and registered investment companies, and multiple years of service as an officer of other registered investment companies, including those serving as investment options for variable contracts.

Leadership Structure and Oversight Responsibilities

Overall responsibility for oversight of the Trusts and their Portfolios rests with the Boards. The Trusts, on behalf of the Portfolios, have engaged SunAmerica and, for certain Portfolios, have engaged a subadviser, to manage

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the Portfolios on a day-to-day basis. The Board of each Trust is responsible for overseeing SunAmerica, the subadvisers and any other service providers in the operations of the Portfolios in accordance with the provisions of the 1940 Act, applicable provisions of state and other laws, the Trust's Declaration of Trust and By-laws, and each Portfolio's investment objectives and strategies. The Board of each Trust is presently composed of eight (8) members, six (6) of whom are Independent Trustees. If all nominees are elected, effective January 1, 2027, the Board of each Trust will be composed of ten (10) members, a majority of whom will be Independent Trustees. The Board currently conducts regular in-person meetings at least quarterly and holds special in-person or telephonic meetings, or informal conference calls, to discuss specific matters that may arise or require action between regular Board meetings. The Independent Trustees also meet at least quarterly in executive sessions, at which no Trustee who is an interested person of SunAmerica is present. The Independent Trustees have engaged independent legal counsel to assist them in performing their oversight responsibilities.

The Board of each Trust has appointed Ms. Willis, an Independent Trustee, to serve as Chair of the Board. The Chair's role is to preside at all meetings of the Board and to act as a liaison with service providers, including SunAmerica, officers, attorneys, and other Trustees generally, between meetings. The Chair may also perform such other functions as may be delegated by the Board from time to time. The Board of each Trust has established three committees, i.e., the Audit Committee, Nomination and Governance Committee, and Compliance and Risk Committee (each, a "Committee"), to assist the Board in the oversight and direction of the business and affairs of the Portfolios, and from time to time may establish informal working groups to review and address the policies and practices of the Portfolios with respect to certain specified matters. The Committee system facilitates the timely and efficient consideration of matters by the Trustees and facilitates effective oversight of compliance with legal and regulatory requirements and of the Portfolios' activities and associated risks. The standing Committees currently conduct an annual review of their charters, which includes a review of their responsibilities and operations. The Nomination and Governance Committee and the Board of each Trust as a whole also conduct an annual evaluation of the performance of the Board, including consideration of the effectiveness of the Board's committee structure. The Board of each Trust has determined that the Board's leadership structure is appropriate because it allows the Board to exercise informed and independent judgment over the matters under its purview and it allocates areas of responsibility among the Committees and the full Board in a manner that enhances efficient and effective oversight.

The Portfolios are subject to a number of risks, including, among others, investment, compliance, operational and valuation risks. Risk oversight forms part of each Board's general oversight of its Portfolios and is addressed as part of various Board and Committee activities. Day-to-day risk management functions are subsumed within the responsibilities of SunAmerica, which carries out the Portfolios' investment management and business affairs, and also by the Portfolios' sub-advisers and other service providers in connection with the services they provide to the Portfolios. Each of SunAmerica, the sub-advisers and other service providers has its own independent interest in risk management, and its policies and methods of risk management will depend on its functions and business models. As part of its regular oversight of the Portfolios, the Board, directly and/or through a Committee, interacts with and/or reviews reports from, among others, SunAmerica, the sub-advisers and the Portfolios' other service providers, the Portfolios' Chief Compliance Officer, the independent registered public accounting firm for the Portfolios, legal counsel to the Portfolios, and internal auditors for SunAmerica or its affiliates, as appropriate, relating to the operations of the Portfolios. The Board of each Trust recognizes that it may not be possible to identify all of the risks that may affect the Portfolios or to develop processes and controls to eliminate or mitigate their occurrence or effects. The Board of each Trust may, at any time and in its discretion, change the manner in which it conducts risk oversight.

Each Trust pays no salaries or compensation to any of its officers, all of whom are officers or employees of SunAmerica or its affiliates. For the Trusts, an annual fee and expenses are paid to each Trustee who is not an officer or employee of Venerable or its affiliates for attendance at meetings of the Board. Effective January 1, 2026, the annual fee paid to each Independent Trustee is $275,000. Trustees are compensated $3,000 for special in-person or telephonic Board meetings. The Independent Chair receives an additional retainer fee of $115,000. These expenses are allocated on the basis of the relative net assets of each Portfolio of the Trusts. Mr. Genoy and Ms. Levy, who are Interested Trustees by virtue of their employment relationship with SunAmerica, receive no remuneration from the Trust.

Each Independent Trustee serves on each Committee of each Trust's Board. Members of each Committee serve without compensation, except that Mr. Self, as Audit Committee Chair, receives an additional retainer fee of

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$35,000. Ms. Doi, as Nomination Committee Chair, receives an additional retainer fee of $25,000, and Ms. Kerns, as Compliance and Risk Committee Chair, receives an additional retainer fee of $25,000.

The Audit Committee is charged with selecting, overseeing and setting the compensation of the Portfolios' independent registered public accounting firm. The Audit Committee is responsible for pre-approving all audit and non-audit services performed by the independent public accounting firm for the Portfolios and, should it be necessary, for pre-approving certain non-audit services performed by the independent registered public accounting firm for SunAmerica and certain control persons of SunAmerica. The Audit Committee is also responsible for reviewing with the independent registered public accounting firm the audit plan and results of the audit along with other matters. The Audit Committee of SAST's Board met four times during SAST's fiscal years ended January 31, 2026 and December 31, 2025, as applicable. The Audit Committee of SST's Board met five times during the fiscal year ended March 31, 2026. The Board of each Trust has adopted an Audit Committee charter, a copy of which is found in Exhibit B.

The Nomination and Governance Committee of each Trust's Board recommends to the Trustees those persons to be nominated as candidates to serve as Trustees and voted upon by shareholders and selects and proposes nominees for election by the Trustees to the Board between shareholders' meetings. The Nomination and Governance Committee of each Trust will consider candidates proposed by shareholders for election as Trustees. Any such recommendations from shareholders should be directed to the attention of the Secretary of the Trust at One World Trade Center, Suite J, 49th Floor, New York, NY 10007. The Nomination and Governance Committee reviews at least annually the independence of the Independent Trustees and the independence of legal counsel to the Independent Trustees. The Nomination and Governance Committee also reviews and makes recommendations with respect to the size and composition of the Board and its Committees and monitors and evaluates the functioning of the Committees. The Nomination and Governance Committee of SAST's Board met three times during SAST's fiscal years ended January 31, 2026 and December 31, 2025, as applicable. The Nomination and Governance Committee of SST's Board met four times during the fiscal year ended March 31, 2026. The Board of each Trust has adopted a Nomination and Governance Committee charter, a copy of which is found in Exhibit C.

The Compliance and Risk Committee of each Trust's Board is responsible for assisting the Board in its oversight of the Trust's compliance with regulatory requirements, material operating risks, and promotion of honest and ethical conduct in the Trust's affairs. Ms. Kerns serves as the Chair of the Compliance and Risk Committee. The Compliance and Risk Committee of SAST's Board met three times during SAST's fiscal years ended January 31, 2026 and December 31, 2025, as applicable. The Compliance and Risk Committee of SST's Board met four times during the fiscal year ended March 31, 2026.

Compensation of Independent Trustees

The following table sets forth the aggregate compensation paid to each Independent Trustee (or nominee, as applicable) by each Trust for his or her service as Trustee during its most recently completed fiscal year(s) and by the Trusts and/or other registered investment companies in the Fund Complex for the most recently completed calendar year. The information presented reflects compensation arrangements in effect as of January 1, 2026. Interested Trustees are not eligible for compensation or retirement benefits and, therefore, are not shown below.

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Trustee Ownership of Portfolio Shares

The following table shows the dollar range of shares beneficially owned by the Trustee nominees that they are nominated to oversee as of June 30, 2026.

As of June 30, 2026, the Trustees and officers of the Trusts owned in the aggregate less than 1% of the total outstanding shares of each Portfolio of the Trusts which they oversee (or are nominated to oversee).

As of June 30, 2026, no Independent Trustee or Independent Trustee nominee, nor any of his or her immediate family members, owned beneficially or of record any securities in SunAmerica, any subadviser, the distributor or any person other than a registered investment company, directly or indirectly, controlling, controlled by or under common control with any such entity.

Shareholder Communications with the Boards

Shareholders wishing to communicate with members of a Board may submit a written communication to the Board of Trustees, c/o the Secretary of Seasons Series Trust or SunAmerica Series Trust, as applicable, at One World Trade Center, Suite J, 49th Floor, New York, NY 10007.

Other Board-Related Matters

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During SST's fiscal year ended March 31, 2026, the Board held six meetings (including regularly scheduled and special meetings), and each Trustee who currently serves on the Board and is proposed for election or re-election at the Special Meeting attended at least 75% of the meetings of the Board and all committees of which he or she was a member.

During SAST's fiscal years ended December 31, 2025 and January 31, 2026, the Board held five meetings (including regularly scheduled and special meetings), and each Trustee who currently serves on the Board and is proposed for election or re-election at the Special Meeting attended at least 75% of the meetings of the Board and all committees of which he or she was a member.

Fees Paid to Independent Registered Public Accounting Firm

PricewaterhouseCoopers LLP ("PwC") serves as the independent registered public accounting firm for the Portfolios. In addition, PwC prepares each Portfolio's federal and state annual income tax returns and provides certain non-audit services. The Audit Committee of each Board has selected PwC as the Portfolios' independent registered public accounting firm for the current fiscal year, and such selection has been ratified by the Board. Representatives of PwC are not expected to be present at the Special Meeting, but have been given the opportunity to make a statement if they so desire and will be available should any matter arise requiring their presence. PwC has informed the Trusts that it has no material direct or indirect financial interest in any Portfolio.

The table below sets forth the aggregate fees billed by PwC for each Portfolio's most recent two fiscal years for (1) professional services rendered for audit services, including the audit or review of each Portfolio's financial statements and services normally provided in connection with statutory and regulatory filings or engagements for those fiscal years; (2) audit-related services reasonably related to the audit or review of each Portfolio's financial statements not reported under (1); (3) professional services rendered for tax compliance, tax advice and tax planning; and (4) other products and services not reported under (1) through (3).

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There were no fees for audit-related services, tax services or other services approved by the Audit Committee pursuant to Rule 2-01(c)(7)(i)(C) of Regulation S-X for the 2025 or 2026 fiscal years. Fees for audit-related services, tax services or other services required to be approved by the Audit Committee pursuant to Rule 2-01(c)(7)(ii) of Regulation S-X for the 2025 and 2026 fiscal years were $488,000 and $786,000, respectively.

There were no fees billed by PwC to SunAmerica or any entity controlling, controlled by, or under common control with SunAmerica (the "SunAmerica Affiliates") for the 2025 or 2026 fiscal years that are required by Rule 2-01(c)(7)(i) to be pre-approved by the Audit Committee.

The Audit Committee pre-approves all audit services provided by PwC to the Trusts and approves all non-audit services provided by PwC to the Trusts, SunAmerica, and SunAmerica Affiliates, if an engagement by SunAmerica or a SunAmerica Affiliate relates directly to the operations and financial reporting of the Trusts. The Audit Committee has not established any pre-approval policies and procedures that permit the pre-approval of the above services other than by the full Audit Committee. Certain de minimis exceptions are permitted for non-audit services in accordance with Rule 2-01(c)(7)(i)(C) of Regulation S-X.

No fees billed to the Trusts, SunAmerica or SunAmerica Affiliates for audit-related services, tax services, or other services were approved pursuant to Rule 2-01(c)(7)(i)(C) of Regulation S-X.

PwC billed aggregate fees for non-audit services rendered to SST, SunAmerica, and SunAmerica Affiliates that provide ongoing services to SST of $983,533 for the 2025 fiscal year and $628,891 for the 2026 fiscal year. It

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billed aggregate fees for non-audit services rendered to SAST, SunAmerica, and SunAmerica Affiliates that provide ongoing services to SAST of $1,527,391 for the 2025 fiscal year and $993,783 for the 2026 fiscal year.

PwC billed aggregate fees for non audit services rendered to the SAST Master Feeder Portfolios, the SAST 12/31 Portfolios, SunAmerica, and SunAmerica Affiliates that provide ongoing services to the SAST Master Feeder Portfolios and the SAST 12/31 Portfolios of $976,124 for the 2024 fiscal year and $574,636 for the 2025 fiscal year. The Audit Committee was not required to consider whether non audit services provided by PwC to SunAmerica, or to SunAmerica Affiliates that provide ongoing services to the Trusts, that were not pre approved pursuant to Rule 2 01(c)(7)(ii) of Regulation S X, were compatible with maintaining PwC's independence.

YOUR BOARD UNANIMOUSLY RECOMMENDS THAT YOU VOTE "FOR" THE ELECTION OF EACH NOMINEE TO THE BOARD OF YOUR TRUST.

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PROPOSAL 2

TO APPROVE A CHANGE IN SUB-CLASSIFICATION FROM DIVERSIFIED TO NON-DIVERSIFIED OF EACH OF THE SA AB GROWTH PORTFOLIO, SA FRANKLIN SYSTEMATIC U.S. LARGE CAP CORE PORTFOLIO, SA JPMORGAN EMERGING MARKETS PORTFOLIO, SA JPMORGAN LARGE CAP CORE PORTFOLIO, AND SA WELLINGTON CAPITAL APPRECIATION PORTFOLIO, EACH A SERIES OF SAST

SHAREHOLDERS OF THE PORTFOLIOS VOTING SEPARATELY WITH RESPECT TO THEIR PORTFOLIO

Proposal 2 is asking shareholders of the SA AB Growth Portfolio, SA Franklin Systematic U.S. Large Cap Core Portfolio, SA JPMorgan Emerging Markets Portfolio, SA JPMorgan Large Cap Core Portfolio, and SA Wellington Capital Appreciation Portfolio (the "Portfolios"), each a series of SAST, to review and consider changing the sub-classification of their respective Portfolio(s) from "diversified" to "non-diversified" as defined by the 1940 Act.

The Board of SAST (the "Board"), including its Independent Trustees, was provided with information regarding the Proposal via written consent (the "Consent") and considered whether to recommend that shareholders vote for the Proposal. Based on information provided to the Board during and in advance of receiving the Consent, the Board unanimously voted, within the context of its full deliberations, to recommend that shareholders of the Portfolios vote in favor of reclassifying the diversification status of the Portfolios from diversified to non-diversified.

Section 5(b)(1) of the 1940 Act defines the sub-classifications funds operate under as either "diversified" or "non-diversified." Currently, each Portfolio is classified as a "diversified" fund and is limited as to the amount it may invest in any single issuer. Under the 1940 Act, a diversified fund may not, with respect to 75% of the value of its total assets, invest in securities of any one issuer if, as a result of such investment (i) more than 5% of the value of the fund's total assets would be invested in securities of such issuer, or (ii) the fund would hold more than 10% of the outstanding voting securities of such issuer.

The percentage limitations noted above do not apply to securities issued or guaranteed by the U.S. government, its agencies or instrumentalities, or to securities issued by other investment companies. With respect to the remaining 25% of the value of its total assets, a diversified fund may invest more than 5% of the value of its total assets in the securities of one issuer. These limits apply at the time a diversified fund purchases a security; a diversified fund may exceed these limits if positions it already holds increase in value relative to the rest of the fund's holdings. In contrast, a non-diversified fund is not subject to the limits applicable to a diversified fund and may invest a greater percentage of its assets in a single issuer or a fewer number of issuers.

Section 13(a)(1) of the 1940 Act requires shareholder approval for a change in a fund's sub-classification from a diversified to non-diversified by the affirmative vote of a majority of the fund's outstanding voting securities.

If the Proposal is approved by shareholders, the following disclosure regarding diversification classification would be revised to no longer apply to the SA AB Growth Portfolio, SA JPMorgan Emerging Markets Portfolio, SA JPMorgan Large Cap Core Portfolio, and SA Franklin Systematic U.S. Large Cap Core Portfolio:

Each of the Portfolios, except the SA Fidelity Institutional AM^® Real Estate Portfolio, SA Janus Focused Growth Portfolio, SA MFS Large Cap Growth Portfolio and SA PIMCO Global Bond Opportunities Portfolio is currently classified as a diversified fund under the 1940 Act. This means that a Portfolio (other than the SA Fidelity Institutional AM^® Real Estate Portfolio, SA Janus Focused Growth Portfolio, SA MFS Large Cap Growth Portfolio and SA PIMCO Global Bond Opportunities Portfolio) may not purchase securities of an issuer (other than obligations issued or guaranteed by the U.S. government, its agencies or instrumentalities and securities of other investment companies) if, with respect to 75% of its total assets, (a) more than 5% of the Portfolio's total assets would be invested in securities of that issuer (except, in the case of the SA Large Cap Growth Index Portfolio, as may be necessary to approximate the composition of its benchmark index) or (b) the Portfolio would hold more than 10% of the outstanding voting securities of that issuer. With respect to the remaining 25% of its total assets, the Portfolio can invest more than 5% of its assets in one issuer. Under the 1940 Act, a Portfolio cannot change its classification from diversified to non-diversified without shareholder approval.

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If the Proposal is approved by shareholders, the following disclosure regarding diversification classification would be revised to no longer apply to the SA Wellington Capital Appreciation Portfolio:

Each of the Portfolios is currently classified as a diversified fund under the 1940 Act. This means that a Portfolio may not purchase securities of an issuer (other than obligations issued or guaranteed by the U.S. government, its agencies or instrumentalities and securities of other investment companies) if, with respect to 75% of its total assets, (a) more than 5% of the Portfolio's total assets would be invested in securities of that issuer or (b) the Portfolio would hold more than 10% of the outstanding voting securities of that issuer. With respect to the remaining 25% of its total assets, the Portfolio can invest more than 5% of its assets in one issuer. Under the 1940 Act, a Portfolio cannot change its classification from diversified to non-diversified without shareholder approval.

All other investment policies will remain unchanged.

The change to non-diversified status would allow each Portfolio to hold positions over 5% in single issuers that, in the aggregate, exceed 25% of the Portfolio's assets. SunAmerica believes that this increased investment flexibility may provide opportunities to enhance each Portfolio's performance and would allow each Portfolio to acquire and hold larger positions in the securities of a single issuer only if and when it believes doing so justifies the risks involved. SunAmerica further believes this flexibility would allow it to better align each Portfolio's portfolio with SunAmerica's or the applicable sub-adviser's philosophy and portfolio construction process with respect to the Portfolio's particular investment strategy.

Each of the Portfolios has seen their benchmark indices become more concentrated over time. Over the past several months, certain stocks contained in each Portfolio's benchmark have experienced increases in their market capitalizations. A Portfolio's benchmark index is not limited by the 1940 Act diversification requirement. As a result, the benchmark indices have become much more concentrated at the individual stock level. This level of index concentration coupled with the limitations placed on a diversified investment company can, at times, constrain a Portfolio's ability to fully achieve target exposures to individual securities. The current diversified status of each Portfolio limits its ability to invest above 5% in certain issuers and could require a Portfolio to be underweight at least some of the top holdings in its benchmark, even if the Portfolio management team finds them to be attractive investment opportunities. This limitation can ultimately inhibit the opportunity for a Portfolio to implement its principal investment strategy and can hinder its ability to outperform its benchmark.

Due to the 1940 Act diversification requirements, SunAmerica and/or a sub-adviser may have to underweight certain holdings of diversified portfolios relative to SunAmerica's and/or the sub-adviser's desired portfolio weight. As a result, SunAmerica and/or a sub-adviser may be unable to equal or overweight positions relative to a Portfolio's benchmark even if, in accordance with the Portfolio's investment objective and principal investment strategy, SunAmerica and/or the sub-adviser determines that those positions represent the best available investment opportunity. SunAmerica believes that this limitation may constrain its and/or a sub-adviser's ability to fully implement attractive investment opportunities and potentially outperform the applicable benchmark. This limitation may inhibit a Portfolio's ability to implement its principal investment strategy and may hinder its ability to outperform its benchmark or place the Portfolio at a competitive disadvantage relative to its peer funds that have similar investment strategies and operate as non-diversified investment companies. Therefore, SunAmerica believes that reclassifying each Portfolio as non-diversified is in the best interests of the Portfolio and its shareholders. SunAmerica and/or the sub-adviser anticipate that each Portfolio would better reflect its assessment of appropriate weightings based on an issuer's market capitalization, growth characteristics and potential risk-adjusted performance. While approval of the Proposal would provide SunAmerica with greater long-term flexibility in executing each Portfolio's investment strategy by allowing increased exposures to certain holdings, it is not otherwise expected to affect the way the Portfolio is currently managed. The investment objective and investment strategies for the Portfolios would not change due to approval of the Proposal.

Generally, diversification reduces risk and non-diversification increases risk. Shareholders of each Portfolio are being asked to change the Portfolio from diversified to non-diversified, which could change the Portfolio's risk profile or make it a riskier fund. For example, because a non-diversified fund may invest its assets in the securities of fewer issuers, such fund's shares may become more volatile. That is, the value of a fund's shares may increase or decrease more rapidly than if the fund had remained diversified. Nonetheless, SunAmerica and/or the Portfolio's sub-adviser(s)

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will perform extensive analysis on all securities in an effort to manage this risk. In addition, SunAmerica and/or a sub-adviser anticipates that, even as a non-diversified Portfolio, each Portfolio would continue to hold securities from a substantial variety of different issuers. Finally, each Portfolio intends to continue to meet the tax diversification requirements applicable to regulated investment companies under Subchapter M of the Internal Revenue Code.

There is a risk that some Portfolio shareholders may not be in favor of a less diversified Portfolio, which could result in possible investor outflows in response to the proposed change. Also, portfolio turnover is anticipated to increase to align with a more concentrated portfolio, which creates the potential for realizing capital gains (if they are not offset by capital losses). This risk may adversely impact taxable shareholders.

A non-diversified fund may from time to time temporarily operate in a diversified manner without losing its non-diversified status and, as a result, at times, if the Proposal is approved, a Portfolio may not take advantage of the greater flexibility afforded to a non-diversified fund. SunAmerica will reserve the freedom of action to operate a Portfolio as non-diversified only if and when it believes that doing so would be in shareholders' best interests, provided that if a Portfolio does not operate as non-diversified within three years of shareholder approval, the 1940 Act will require the Portfolio to again seek shareholder approval to reserve the freedom of action to operate as non-diversified.

For the reasons discussed above, the Board and SunAmerica believe that reclassifying each Portfolio as non-diversified would be in the best interests of the Portfolio and its shareholders because operating as a non-diversified investment company would provide the Portfolio's investment team with increased investment flexibility and the potential for better investment performance over time.

If shareholders approve the Proposal, it is expected that the change would be effective on or about [●].

THE BOARD OF SAST UNANIMOUSLY RECOMMENDS THAT SHAREHOLDERS OF EACH PORTFOLIO VOTE "FOR" PROPOSAL 2.

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VOTING INFORMATION

General

SST and SAST are Massachusetts business trusts organized on October 10, 1995, and September 11, 1992, respectively. They are registered with the SEC under the 1940 Act as open-end management investment companies. SST currently offers 14 Portfolios. SAST currently offers 59 Portfolios. Shares of the Trusts are offered primarily to the Separate Accounts of the Life Companies as investment options under the Variable Contracts. Certain Portfolios that are operated as "funds-of-funds" hold shares of other Portfolios.

Shareholder Information

As of the close of business on the Record Date, each of the Portfolios has the number of shares outstanding as set forth in Exhibit D, which in each case equals the number of votes that shareholders of the Portfolio are entitled to cast. Exhibit E lists the record and/or beneficial owners of 5% or more of the shares of each class of each Portfolio outstanding on the Record Date.

As of the Record Date, there were no Variable Contract owners who beneficially owned a 5% or greater voting interest in any Portfolio, and officers and Trustees of the Trusts and members of their families, as a group, beneficially owned (i.e., as owners of Variable Contracts) less than 1% of each Portfolio's shares.

As of the Record Date, the Funds-of-Funds identified in Exhibit E owned a 5% or greater voting interest in certain Underlying Portfolios (as defined below).

Shareholder Approval

The number of shares of beneficial interest in a Portfolio for which a Variable Contract owner may give voting instructions is equal to the number of shares, or fraction of shares, held in the Separate Account attributable to the owner's Variable Contract on the Record Date. Each outstanding share of a Portfolio is entitled to one vote, and each fractional share is entitled to a fractional vote on matters on which that Portfolio is voting.

For Proposal 1, the nominees for election as Trustees of each Trust will be elected by a plurality of the votes cast by shareholders of that Trust that are present in person or by proxy at the Special Meeting, provided a quorum is present. Abstentions will have no effect on the outcome of Proposal 1. A "plurality" vote means that the Trustee nominees who receive the largest number of votes cast (even if they receive less than a majority) will be elected as Board members. Since the Trustee nominees are running unopposed, each Trustee nominee only needs one vote to be elected if there is a quorum present at the Special Meeting.

For Proposal 2, for each applicable Portfolio, the affirmative vote of a majority of the outstanding voting securities of the Portfolio, as defined under the 1940 Act, that are present in person or by proxy, is required to approve the proposal. Shareholders of each Portfolio will vote separately with respect to that Portfolio, with all classes of that Portfolio voting together. The 1940 Act defines such vote as the lesser of (i) 67% or more of the total number of shares of all classes of a Portfolio present or represented by proxy at the Special Meeting, voting together as a single class, if holders of more than 50% of the outstanding shares of all classes, taken as a single class, are present or represented by proxy at the Special Meeting; or (ii) more than 50% of the total number of outstanding shares of all classes of a Portfolio, voting together as a single class. Abstentions and broker non-votes, if any, will not count as votes in favor of Proposal 2 but will be counted for quorum purposes.

If a proxy authorization ("Proxy") is properly given in time for a vote at the Special Meeting, or any adjournment thereof (either by returning the paper voting instruction card or by submitting a Proxy by telephone or over the Internet), the shares of the Portfolio represented thereby will be voted at the Special Meeting in accordance with the shareholder's instructions. If no instructions are provided on a properly submitted voting instruction or Proxy, the shares represented thereby will be voted in favor of each applicable Proposal. The Proxy grants discretion to the

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persons named therein, as proxies, to take such further action as they may determine appropriate in connection with any other matter that may properly come before the Special Meeting and any postponements or adjournments thereof.

The presence in person or by proxy of the holders of shares entitled to vote and representing at least thirty percent (30%) of the shares of a Trust, with respect to Proposal 1, or a Portfolio, with respect to Proposal 2, will constitute a quorum at the Special Meeting with respect to that Proposal. Notwithstanding the foregoing, because Proposal 2 requires approval by a majority of the outstanding voting securities of a Portfolio, as defined under the 1940 Act, more than fifty percent (50%) of the shares of the Portfolio entitled to vote at the Special Meeting must be present in person or by proxy to act on Proposal 2.

The Special Meeting may be adjourned with respect to one or more proposals to be considered, or one or more Portfolios, by the Chair of the Special Meeting, whether or not a quorum is present with respect to that proposal or Portfolio. If the time and place for the adjourned meeting is announced at the Special Meeting, no further notice need be given. The quorum requirements are likely to be attained due to "echo voting" described below.

All properly executed Proxies received prior to the Special Meeting or any postponement or adjournment thereof will be voted in accordance with the instructions marked thereon or otherwise as provided therein. For purposes of determining the presence of a quorum for transacting business at the Special Meeting and determining whether sufficient votes have been received for approval of any proposal to be acted upon at the Special Meeting, abstentions and broker non-votes, if any, will be treated as shares that are present at the Special Meeting and entitled to vote on the proposal, but that have not been voted. Unless instructions to the contrary are marked, properly executed Proxies will be voted "For" the approval of each applicable Proposal.

Manner of Voting

In addition to voting at the virtual Special Meeting, shareholders may vote prior to the Special Meeting by promptly returning the enclosed proxy card or voting instruction card or by casting their vote or providing their voting instructions via telephone or over the Internet using the instructions provided on the enclosed proxy card or voting instruction card.

Any shareholder who has given a Proxy, whether in written form, by telephone or over the Internet, may revoke it at any time prior to its exercise by submitting a subsequent written, telephonic or electronic vote, or by giving written notice of revocation to the Secretary of the applicable Trust.

Voting by the Life Companies. Shares of the Portfolios are sold to the Separate Accounts and are used as investment options under Variable Contracts. Contract Owners who select a Portfolio for investment through a Variable Contract have a beneficial interest in the Portfolio, but do not invest directly in or hold shares of the Portfolio. The Life Companies use the Portfolios as funding vehicles and are, in most cases, the legal shareholders of the Portfolios. As such, the Life Companies will have sole voting power with respect to the shares, but generally will pass through any voting rights to Contract Owners. Therefore, for a Separate Account that is registered with the SEC, a Life Company will request voting instructions from the Contract Owner and will vote shares or other interests in the Separate Account for which voting instructions are received as directed by the Contract Owner.

If an executed voting instruction card is received that does not specify a choice as to a Proposal, a Life Company will consider its timely receipt as an instruction to vote in favor of the Proposal. In the event that any Contract Owner fails to submit voting instructions with respect to the Separate Account or submits an unsigned voting instruction card, the Separate Account will vote the shares attributable to those Contract Owners for, against, or abstain in the same proportion as the shares for which voting instructions were received from Contract Owners investing through the same Separate Account, even if only a small number of Contract Owners provide voting instructions. The effect of proportional voting is that if a large number of Contract Owners fail to give voting instructions, a small number of Contract Owners may determine the outcome of the vote. The Life Companies will also proportionally vote any shares held for their own account. Consistent with the foregoing, other than Proposal 1, voting instructions with respect to a Proposal to abstain will have the same effect as votes against the Proposal. Because each Trust requires the affirmative vote of a plurality of votes to elect each of the Board nominees, abstentions, if any, will not have an effect on the outcome of Proposal 1. In certain circumstances, a Life Company has the right to disregard voting

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instructions from owners of certain Variable Contracts, although each Life Company does not believe that these circumstances exist with respect to the proposals to be voted on at the Special Meeting.

The Life Companies do not require that a specified number of Variable Contract owners submit voting instructions before the Life Companies will vote the shares of the Portfolios held by their respective Separate Accounts at the Special Meeting. Therefore, a small number of Variable Contract owners may determine whether or not a proposal is approved. In determining to vote the shares of a Portfolio held by its Separate Account(s) at the Special Meeting, a Life Company, in its sole discretion, may consider such factors as (1) the percentage of votes represented by voting instructions received by the Life Company, and (2) the percentage of Variable Contracts represented by voting instructions received by the Life Company. When such determination has been made, the Life Company will vote the shares of the Portfolios held by its Separate Accounts as outlined in the preceding paragraph.

Voting by Funds-of-Funds. The SA Global Index Allocation 60/40 Portfolio, SA Global Index Allocation 75/25 Portfolio, SA Global Index Allocation 90/10 Portfolio, SA Index Allocation 60/40 Portfolio, SA Index Allocation 80/20 Portfolio, SA Index Allocation 90/10 Portfolio, SA VCP Dynamic Allocation Portfolio, SA VCP Dynamic Strategy Portfolio, and SA VCP Index Allocation Portfolio of SAST, and the SA Allocation Aggressive Portfolio, SA Allocation Moderately Aggressive Portfolio, SA Allocation Moderate Portfolio, and SA Allocation Balanced Portfolio of SST are structured as "funds-of-funds," which means that they generally pursue their investment goals by investing in shares of other portfolios of SAST and SST (the "Underlying Portfolios") as part of their investment strategies (collectively, the "Funds-of-Funds"). The Funds-of-Funds will vote the shares of the Underlying Portfolios according to the Funds-of-Funds' proxy voting policies and procedures.

Voting by Mail. To vote by mail, you should date and sign the proxy card or voting instruction card, as applicable, included with this Proxy Statement, indicate your vote on the Proposals, and return the form in the envelope provided. Please mail it early enough to be delivered prior to the Special Meeting.

Voting by Telephone. You may use the automated touch-tone voting method by calling the toll-free number provided on the proxy card or voting instruction card, as applicable. At the prompt, follow the menu instructions. Prior to calling, you should read this Proxy Statement and have your proxy card or voting instruction card at hand.

Internet Voting Prior to the Special Meeting. To vote over the Internet prior to the Special Meeting, please log on to the website listed on your proxy card or voting instruction card, as applicable, and click on the proxy voting button. Prior to logging on, you should read this Proxy Statement and have your proxy card or voting instruction card at hand. After logging on, follow the instructions on the screen. If you receive more than one proxy card or voting instruction card, you may vote each card during the same session.

Additional Information. Shareholders voting their Proxies by telephone or Internet need not return their proxy card or voting instruction card by mail.

A person submitting votes by telephone or Internet is deemed to represent that he or she is authorized to vote on behalf of all owners of the account, including spouses or other joint owners. By using the telephone or the Internet to submit voting instructions, the shareholder is authorizing EQ Fund Solutions, LLC ("EQ"), as proxy solicitor, and its agents to execute a Proxy to vote the shareholder's shares at the Special Meeting as the shareholder has indicated.

Each Portfolio believes that the procedures for authorizing the execution of a Proxy by telephone or Internet set forth above are reasonably designed to ensure that the identity of the shareholder authorizing the vote is accurately determined and that the voting instructions of the shareholder are accurately recorded.

You are requested to fill in, sign and return the enclosed proxy card or voting instruction card, as applicable, promptly. No postage is necessary if mailed in the United States.

HOUSEHOLDING

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Please note that only one copy of the Proxy Statement and other shareholder documents may be delivered to a shareholder or to multiple shareholders of the Portfolios whose accounts are registered under the same client identification number and the same address, unless the Portfolios have received instructions to the contrary. This practice is commonly called "householding," and it is intended to reduce expenses and eliminate duplicate mailings of shareholder documents. Mailings of your shareholder documents may be householded indefinitely unless you instruct us otherwise.

To request a separate copy of the Proxy Statement or any other shareholder document, or for instructions as to how to request a separate copy of these documents or how to request a single copy if multiple copies of these documents are received, shareholders should contact the applicable Trust at the address and phone number set forth on the first page of the Notice of Joint Special Meeting.

OTHER INFORMATION

Solicitation of Proxies

Solicitations of proxies are being made on behalf of each of the Portfolios and the applicable Board primarily by the mailing of the Notice and this Proxy Statement, with its enclosures, on or about [●]. In addition to the solicitation of proxies by mail, employees of the Portfolios and their affiliates may, without additional compensation, solicit proxies in person or by telephone or other oral communication.

The tabulation and solicitation expenses in connection with the proposals are estimated to be approximately $[ ], and other expenses of the proposals, including legal, audit, filing fees and other related expenses, are estimated to be approximately $[ ]. Such costs will be borne equally by the Portfolios. Any additional costs that may be incurred in connection with contacting those shareholders who have not voted in the event of a need for re-solicitation of votes will be borne by the Portfolios and SunAmerica or its affiliates in the same manner.

SunAmerica has retained EQ to serve as a proxy solicitation firm on behalf of the Portfolios. EQ, among other things, is (i) required to maintain the confidentiality of all shareholder information, (ii) prohibited from selling or otherwise disclosing shareholder information to any third party, and (iii) required to comply with applicable telemarketing laws.

Questions about the Proposals should be directed to EQ by telephone at (800) 859-8511.

Reports to Shareholders

Copies of each Portfolio's most recent Annual Report and Semi-Annual Report to shareholders will be furnished without charge upon request in writing to Seasons Series Trust or SunAmerica Series Trust, as applicable, P.O. Box 15570, Amarillo, Texas 79105-5570, or by calling 1-800-445-7862.

Shareholder Proposals

The Portfolios do not hold regular or annual meetings of shareholders. The Portfolios hold meetings of shareholders whenever (a) the 1940 Act requires shareholders to act upon certain proposals, including (i) election of Trustees, (ii) approval of a management agreement, (iii) approval of a distribution agreement, (iv) changes to fundamental restrictions, and (v) certain reorganizations, and (b) when required under the Trust's Declaration of Trust.

Shareholders who would like to submit proposals for consideration at future shareholder meetings should send written proposals to Kristina Magolis, Chief Legal Officer, Vice President and Secretary of SunAmerica Series Trust and Seasons Series Trust, One World Trade Center, Suite J, 49th Floor, New York, NY 10007. To be considered for presentation at a shareholders' meeting, rules promulgated by the SEC require that, among other things, a shareholder's proposal must be received at the offices of the applicable Trust within a reasonable time before a solicitation is made. Timely submission of a proposal does not necessarily mean that such proposal will be included.

Other Business

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SunAmerica, the Life Companies and the Trusts know of no business to be presented at the Special Meeting other than the proposals set forth in this Proxy Statement. Should any other proposal requiring the vote of shareholders arise, the proxies will vote thereon according to their best judgment in the interests of the Trusts and the Portfolios.

Service Providers

SunAmerica, the Portfolios' investment adviser and manager, is located at One World Trade Center, Suite J, 49th Floor, New York, NY 10007.

Directed Services LLC, the principal underwriter for each Trust, is located at 1475 Dunwoody Drive, Suite 200, West Chester, PA 19380.

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EXHIBIT A

Information About Current Officers of the Trusts

The following table lists the officers of the Trusts, their ages, current position(s) held with the Trusts, length of time served and principal occupations during the past five years. Unless otherwise noted, the address of each executive officer is 5300 Memorial Drive, Suite 1150, Houston, TX 77007.

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A-2

EXHIBIT B

SUNAMERICA SERIES TRUST

SEASONS SERIES TRUST

AUDIT COMMITTEE CHARTER

Mission

The mission of the Audit Committees (each, a "Committee") of the Boards of Trustees (each, a "Board") of SunAmerica Series Trust and Seasons Series Trust (each, a "Trust") is to oversee: (i) each Trust's accounting and financial reporting policies and practices; (ii) each Trust's internal controls and, as appropriate, the internal controls of certain service providers;

(iii) the integrity, quality and objectivity of each Trust's financial statements and the independent audit thereof; including, but not limited to, oversight of the qualifications and independence of the Trust's independent registered public accounting firm (the "Independent Auditor").

The Committee will act as a liaison between the Independent Auditor and the Board and will assist the Board in its oversight of the Trust's compliance with legal and regulatory requirements related to the Trust's financial reporting, internal controls and independent audits. The Committee will also report to the Board, if necessary, any relationships between the Independent Auditor and the Trust, or any other relationships, that come to the Committee's attention and that may adversely affect the independence of the Independent Auditor.

The function of the Committee is to provide oversight; it is the responsibility of each Trust and the Trust's management to maintain appropriate systems for accounting and internal control, and it is the responsibility of the Trust's Independent Auditor to plan and carry out the Trust's audit in accordance with auditing standards generally accepted in the United States ("GAAS").

Specifically, the Trust's management is responsible for: (i) the preparation, presentation and integrity of the Trust's financial statements; (ii) the maintenance of appropriate accounting and financial reporting principles and policies; and (iii) the maintenance of internal control over financial reporting and other procedures designed to ensure compliance with accounting standards and related laws and regulations. The Independent Auditor is responsible for planning and carrying out an audit consistent with GAAS and the terms of its engagement letter.

The review of the Trust's financial statements by the Committee is not an audit, nor does the Committee's review substitute for the responsibilities of the Trust's management for preparing, or the Independent Auditor for auditing, the Trust's financial statements. Similarly, the review of management's processes to assess and manage risk with respect to accounting and financial reporting matters is not an audit nor does the Committee's review substitute for the responsibilities of the Trust's management in this area. Members of the Committee are not full- time employees of the Trust, and, in serving on the Committee, are not, and do not hold themselves out to be, acting as accountants or auditors. It is not the duty or responsibility of the Committee or its members to conduct "field work" such as auditing, accounting or risk management reviews or procedures.

In discharging their responsibilities, the members of the Committee are entitled to rely on information, opinions, reports or statements, including financial statements and other financial and risk management data, if prepared or presented by: (i) one or more officers of the Trust whom the Committee reasonably believes to be reliable and competent in the matters presented; or (ii) legal counsel, public accountants, or other persons as to matters the Committee reasonably believes are within those persons' professional or expert competence.

The Independent Auditor is directly accountable to the Committee and must report to the Committee. Nothing in this Charter shall be construed to reduce the responsibilities or liabilities of the Trust's service providers, including the Independent Auditor.

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Committee Membership, Composition and Qualifications

The size of the Committee shall be determined by the Board from time to time in accordance with the Trust's charter. The Board may replace members of the Committee for any reason. No member of the Committee shall be an "interested person" of the Trust as that term is defined in Section 2(a)(19) of the Investment Company Act of 1940, as amended (the "1940 Act"). Members of the Committee must be members of the Board and should be free of any relationships that would interfere with the exercise of independent judgment, including that they may not, other than in their capacity as members of the Audit Committee, the Board, or any other Board committee, accept directly or indirectly any consulting, advisory or other compensatory fee from the Trust or any affiliated person of the Trust. A list of members of the Committee is attached hereto as Appendix A.

The President and Treasurer of the Trust, although not members of the Committee, will nonetheless be expected to have a significant role in assisting the Committee to discharge its responsibilities, including ensuring adequate access to, and support from, the staff of the Trust's investment adviser, SunAmerica Asset Management, LLC.

All Committee members shall be financially literate, as such qualification is interpreted by the Board in its business judgment. The Board shall determine annually whether any member of the Committee is an "audit committee financial expert" ("ACFE") and whether any such expert is "independent"1 as those terms are defined in Item 3 of Form N-CSR. If the Trust does not have at least one member of the Committee who is an ACFE the Trust's periodic reports on Form N- CSR shall disclose the reason for not having such an expert. A Committee member designated as an ACFE shall not be subject to a different or higher degree of individual responsibility, care or obligation than other members of the Committee not so designated.

The members of the Committee shall designate a Chair by majority vote of the full Committee membership.

Operations of the Committee

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Duties and Responsibilities

In accordance with its mission, the Committee shall, to the extent it deems appropriate, carry out the following functions:

Independent Auditor

Financial Reporting Processes

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Ethical and Legal Compliance

B-4

Other Powers and Responsibilities

Amended: December 3, 2020

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APPENDIX A

AUDIT COMMITTEE MEMBERSHIP

Chair

Charles H. Self III

Members

Tracey C. Doi

Jane Jelenko

Christianne F. Kerns

Martha B. Willis

Bruce G. Willison

Amended: December 10, 2025

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EXHIBIT C

SUNAMERICA SERIES TRUST

SEASONS SERIES TRUST

NOMINATION AND GOVERNANCE COMMITTEE

CHARTER

The primary duties and responsibilities of the Nomination and Governance Committees (each, a "Committee") of the Boards of Trustees (each, a "Board") of SunAmerica Series Trust and Seasons Series Trust (each, a "Trust") are to:

The Committee shall be composed entirely of members of the Board who are not considered "interested persons" of the Trust (the "Independent Trustees") as defined in the Investment Company Act of 1940, as amended (the "1940 Act"). A list of members of the Committee is attached hereto as Appendix A.

The Board will appoint the members of the Committee. The members of the Committee shall designate a Chair by majority vote of the full Committee membership.

The Committee shall meet in person or telephonically at least once annually and is empowered to hold special meetings as circumstances require. A majority of the members of the Committee shall constitute a quorum for the transaction of business at any meeting of the Committee. The action of a majority of the members of the Committee present at a meeting at which a quorum is present shall be the action of the Committee. The Committee may meet in person, by telephone, or by other electronic communication method so long as all persons participating in the meeting can hear each other at the same time.

The Committee shall report its activities to the Board and make such recommendations as the Committee may deem necessary or appropriate. The Committee shall cause minutes of each meeting of the Committee to be prepared,

C-1

which minutes shall be approved by the Committee or the Board at a future meeting. The Committee may ask legal counsel, representatives of the Trust's manager or investment adviser, or others to attend Committee meetings and provide pertinent information as necessary.

To fulfill its responsibilities and duties, the Committee shall:

Board Nomination Functions

Ongoing Trustee Independence

Independent Legal Counsel

Committee Nomination Functions

C-2

Compensation Functions

Documents/Reports

Other Powers and Responsibilities

The Committee shall have the resources and authority appropriate to discharge its responsibilities, including authority to utilize Trust counsel and to retain special counsel, experts or other persons with specific competence at the expense of the Trust, as it deems necessary and proper.

Approved March 23, 2017

Amended March 27, 2018

Amended March 27, 2019

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APPENDIX A

NOMINATION AND GOVERNANCE COMMITTEE MEMBERSHIP

Chair

Tracey C. Doi

Members

Jane Jelenko

Christianne F. Kerns

Charles H. Self III

Martha B. Willis

Bruce G. Willison

Amended: October 12, 2023

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APPENDIX B

NOMINATION AND GOVERNANCE COMMITTEE

POLICY REGARDING SELECTION OF TRUSTEE NOMINEES

When a vacancy on the Board exists or is anticipated, or when the Nomination and Governance Committee (the "Committee") deems it desirable to select a new or additional trustee, the Committee will consider any candidate for trustee recommended by a current shareholder if the Committee is required by law to do so. Any such recommendation must contain sufficient background information concerning the candidate to enable the Committee to make a proper judgment as to the candidate's qualifications. However, the Committee will not be required to solicit recommendations from a Trust's shareholders.

The Committee has not established specific, minimum qualifications that must be met by an individual for the Committee to recommend that individual for nomination as a trustee. In seeking candidates to consider for nomination to fill a vacancy on the Board, or when the Committee deems it desirable to select a new or additional trustee, the Committee expects to seek referrals from a variety of sources, including current Trustees, management of the Trusts and counsel to the Trusts and/or the Independent Trustees. The Committee may also engage a search firm to identify or evaluate or assist in identifying or evaluating candidates.

In evaluating candidates for a position on the Board, the Committee considers a variety of factors, including, as appropriate:

Overall, the Committee will seek to identify the most qualified candidates, and in doing so may consider the above factors, or such others factors as it may identify from time to time, as it deems appropriate in its sole discretion. For example, the Board, in its sole discretion, may consider how the candidate would complement the existing diversity of the Board, and would contribute to the Board as a whole, both in terms of viewpoint, professional experience, education, skills and other individual qualities and attributes, as well as in terms of race, gender, national origin, culture and geography. Prior to making a final recommendation to the Board, the Committee may conduct personal interviews with

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the candidates it concludes are the most qualified. Any candidates recommended by shareholders will be evaluated in the same manner.

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EXHIBIT D

SHARES OUTSTANDING AS OF THE RECORD DATE

As of the Record Date, the following number of shares of each Portfolio were outstanding and entitled to vote:

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