FORM OF] SUBADVISORY AGREEMENT

Exhibit 28(d)(lvii)

[FORM OF]

SUBADVISORY AGREEMENT

This SUBADVISORY AGREEMENT is dated as of May 1, 2014 by and between SUNAMERICA ASSET MANAGEMENT, LLC, a Delaware limited liability company (the “Adviser”), and THE BOSTON COMPANY ASSET MANAGEMENT, LLC, a Massachusetts limited liability company (the “Subadviser”).

WITNESSETH:

WHEREAS, the Adviser and SunAmerica Series Trust, a Massachusetts business trust (the “Trust”), have entered into an Investment Advisory and Management Agreement dated as of January 1, 1999, as amended from time to time (the “Advisory Agreement”), pursuant to which the Adviser has agreed to provide investment management, advisory and administrative services to the Trust, and pursuant to it which the Adviser may delegate one or more of its duties to a subadviser pursuant to a written subadvisory agreement; and

WHEREAS, the Trust is registered under the Investment Company Act of 1940, as amended (the “Act”), as an open-end management investment company and may issue shares of beneficial interest, no par value per share, in separately designated portfolios representing separate funds with their own investment objectives, policies and purposes; and

WHEREAS, the Subadviser is engaged in the business of rendering investment advisory services and is registered as an investment adviser under the Investment Advisers Act of 1940, as amended; and

WHEREAS, the Adviser desires to retain the Subadviser to furnish investment advisory services to the investment portfolio(s) of the Trust listed on Schedule A attached hereto (the “Portfolio(s)”), and the Subadviser is willing to furnish such services;

NOW, THEREFORE, it is hereby agreed between the parties hereto as follows:

1. Duties of the Subadviser. The Adviser hereby engages the services of the Subadviser in furtherance of its Investment Advisory and Management Agreement with the Trust. Pursuant to this Subadvisory Agreement and subject to the oversight and review of the Adviser, the Subadviser will manage the investment and reinvestment of the assets of each Portfolio. The Subadviser will determine, in its discretion and subject to the oversight and review of the Adviser, the securities and other investments to be purchased or sold, will provide the Adviser with records concerning its activities which the Adviser or the Trust is required to maintain, and will render regular reports to the Adviser and to officers and Trustees of the Trust concerning its discharge of the foregoing responsibilities. Adviser acknowledges that Subadviser may delegate certain operational and administrative functions to qualified and reputable third parties in support of the services contemplated herein. Subadviser acknowledges that it shall be responsible for the actions of such third parties to the same extent that it would be liable to the

Adviser under the terms of this Subadvisory Agreement. The Subadviser, as agent and attorney-in-fact of the Trust, may, when it deems appropriate and without prior consultation with the Adviser, (a) buy, sell, exchange, convert and otherwise trade in any stocks, bonds and other securities including money market instruments, whether the issuer is organized in the United States or outside the United States, (b) place orders for the execution of such securities transactions with or through such brokers, dealers or issuers as the Subadviser may select and (c) purchase, sell, exchange or convert foreign currency in the spot or forward markets as necessary to facilitate transactions in international securities for the Portfolio(s). In addition, the custodian shall provide the Subadviser with daily reports regarding the cash levels in the Portfolio. The Subadviser shall discharge the foregoing responsibilities subject to the control of the officers and the Trustees of the Trust and in compliance with such policies as the Trustees of the Trust may from time to time establish, and in compliance with (a) the objectives, policies, restrictions and limitations for the Portfolio(s) as set forth in the Trust’s current prospectus and statement of additional information; and (b) applicable laws and regulations.

The Subadviser represents and warrants to the Adviser that each Portfolio will at all times be operated and managed (a) in compliance with all applicable federal and state laws, including securities, commodities and banking laws, governing its operations and investments; (b) so as not to jeopardize either the treatment of the variable annuity contracts which offer the Portfolio(s) (the “Contracts”) as annuity contracts for purposes of the Internal Revenue Code of 1986, as amended (the “Code”), or the eligibility of the Contracts to qualify for sale to the public in any state where they may otherwise be sold; and (c) to minimize any taxes and/or penalties payable by the Trust or the Portfolio(s). Without limiting the foregoing, the Subadviser represents and warrants that it will manage each Portfolio in compliance with (a) the applicable provisions of Subchapter M, chapter 1 of the Code (“Subchapter M”) for each Portfolio to be treated as a “regulated investment company” under Subchapter M; (b) the diversification requirements specified in the Internal Revenue Service’s regulations under Section 817(h) of the Code; (c) the provisions of the Act and rules adopted thereunder; (d) applicable state insurance laws; (e) the objectives, policies, restrictions and limitations for the Portfolio(s) as set forth in the Trust’s current prospectus and statement of additional information as most recently provided by the Adviser to the Subadviser; and (f) the policies and procedures as adopted by the Trustees of the Trust. The Subadviser shall furnish information to the Adviser, as requested, for purposes of compliance with the distribution requirements necessary to avoid payment of any excise tax pursuant to Section 4982 of the Code.

The Subadviser further represents and warrants that to the extent that any statements or omissions made in any Registration Statement for the Contracts or shares of the Trust, or any amendment or supplement thereto, are made in reliance upon and in conformity with information furnished by the Subadviser expressly for use therein, such Registration Statement and any amendments or supplements thereto will, when they become effective, conform in all material respects to the requirements of the Securities Act of 1933 and the rules and regulations of the Commission thereunder (the “1933 Act”) and the Act and will not contain any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading.

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The Subadviser agrees: (a) to maintain a level of errors and omissions or professional liability insurance coverage that, at all times during the course of this Agreement, is appropriate given the nature of its business, and (b) from time to time and upon reasonable request, to supply evidence of such coverage to the Adviser.

The Subadviser accepts such employment and agrees, at its own expense, to render the services set forth herein and to provide the office space, furnishings, equipment and personnel required by it to perform such services on the terms and for the compensation provided in this Agreement.

The Subadviser also represents and warrants that in furnishing services hereunder, the Subadviser will not consult with any other subadviser of the Portfolios or other series of the Trust, to the extent any other subadvisers are engaged by the Adviser, or any other subadvisers to other investments companies that are under common control with the Trust, concerning transactions of the Portfolios in securities or other assets, other than for purposes of complying with the conditions of paragraphs (a) and (b) of rule 12d3-1 under the Act.

2. Portfolio Transactions. (a) The Subadviser is responsible for decisions to buy or sell securities and other investments for the assets of each Portfolio, broker-dealers and futures commission merchants’ selection, and negotiation of brokerage commission and futures commission merchants’ rates. As a general matter, in executing portfolio transactions, the Subadviser may employ or deal with such broker-dealers or futures commission merchants as may, in the Subadviser’s best judgement, provide prompt and reliable execution of the transactions at favorable prices and reasonable commission rates. In selecting such broker-dealers or futures commission merchants, the Subadviser shall consider all relevant factors including price (including the applicable brokerage commission, dealer spread or futures commission merchant rate), the size of the order, the nature of the market for the security or other investment, the timing of the transaction, the reputation, experience and financial stability of the broker-dealer or futures commission merchant involved, the quality of the service, the difficulty of execution, the execution capabilities and operational facilities of the firm involved, and, in the case of securities, the firm’s risk in positioning a block of securities. Subject to such policies as the Trustees may determine and consistent with Section 28(e) of the Securities Exchange Act of 1934, as amended (the “1934 Act”), the Subadviser shall not be deemed to have acted unlawfully or to have breached any duty created by this Agreement or otherwise solely by reason of the Subadviser’s having caused a Portfolio to pay a member of an exchange, broker or dealer an amount of commission for effecting a securities transaction in excess of the amount of commission another member of an exchange, broker or dealer would have charged for effecting that transaction, if the Subadviser determines in good faith that such amount of commission was reasonable in relation to the value of the brokerage and research services provided by such member of an exchange, broker or dealer viewed in terms of either that particular transaction or the Subadviser’s overall responsibilities with respect to such Portfolio and to other clients as to which the Subadviser exercises investment discretion. In accordance with Section 11(a) of the 1934 Act and Rule 11a2-2(T) thereunder, and subject to any other applicable laws and regulations including Section 17(e) of the Act and Rule 17e-1 thereunder, the Subadviser may engage its affiliates, the Adviser and its affiliates or any other subadviser to the Trust and its

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respective affiliates, as broker-dealers or futures commission merchants to effect portfolio transactions in securities and other investments for a Portfolio. The Subadviser will promptly communicate to the Adviser and to the officers and the Trustees of the Trust such information relating to portfolio transactions as they may reasonably request. To the extent consistent with applicable law, the Subadviser may aggregate purchase or sell orders for the Portfolio with contemporaneous purchase or sell orders of other clients of the Subadviser or its affiliated persons. In such event, allocation of the securities so purchased or sold, as well as the expenses incurred in the transaction, will be made by the Subadviser in the manner the Subadviser determines to be equitable and consistent with its and its affiliates’ fiduciary obligations to the Portfolio and to such other clients. The Adviser hereby acknowledges that such aggregation of orders may not result in more favorable pricing or lower brokerage commissions in all instances.

(b) Notwithstanding Section 2(a) above, for such purposes as obtaining investment research products and services, covering fees and expenses, the Adviser may direct the Subadviser to effect a specific percentage of a Portfolio’s transactions in securities and other investments to certain broker-dealers and futures commission merchants’. In designating the use of a particular broker-dealer or futures commission merchant, the Adviser and Subadviser acknowledge:

(1) All brokerage transactions are subject to best execution. As such, Subadviser will use its best efforts to direct non-risk commission transactions to a particular broker-dealer or futures commission merchant designated by the Adviser provided that the Subadviser obtains best execution;

(2) Such direction may result in the Subadviser paying a higher commission, depending upon the Subadviser’s arrangements with the particular broker-dealer or futures commission merchant, or such other factors as market conditions, share values, capabilities of the particular broker-dealer or futures commission merchant, etc.;

(3) If the Subadviser directs payments of an excessive amount of commissions, the executions may not be accomplished as rapidly. In addition, the Subadviser may forfeit the possible advantage derived from the aggregation of multiple orders as a single “bunched” transaction where Subadviser would, in some instances, be in a better position to negotiate commissions; and

(4) Subadviser does not make commitments to allocate fixed or definite amounts of commissions to brokers. As such the Subadviser may be unable to fulfill the Adviser’s request for direction due to the reasons stated above.

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3. Compensation of the Subadviser. The Subadviser shall not be entitled to receive any payment from the Trust and shall look solely and exclusively to the Adviser for payment of all fees for the services rendered, facilities furnished and expenses paid by it hereunder. As full compensation for the Subadviser under this Agreement, the Adviser agrees to pay to the Subadviser a fee at the annual rates set forth in Schedule A hereto with respect to the assets managed by the Subadviser for each Portfolio listed thereon. Such fee shall be accrued daily and paid monthly as soon as practicable after the end of each month (i.e., the applicable annual fee rate divided by 365 applied to each prior days’ net assets in order to calculate the daily accrual). For purposes of calculating the Subadviser’s fee, the average daily net asset value of a Portfolio shall mean the average daily net assets for which the Subadviser actually provides advisory services, and shall be determined by taking an average of all determinations of such net asset value during the month. If the Subadviser shall provide its services under this Agreement for less than the whole of any month, the foregoing compensation shall be prorated.

4. Reports. The Trust, the Adviser and the Subadviser agree to furnish to each other, if applicable, current prospectuses, statements of additional information, proxy statements, reports of shareholders, certified copies of their financial statements, and such other information with regard to their affairs and that of the Trust as each may reasonably request.

5. Status of the Subadviser. The services of the Subadviser to the Adviser and the Trust are not to be deemed exclusive, and the Subadviser shall be free to render similar services to others so long as its services to the Trust are not impaired thereby. The Subadviser shall be deemed to be an independent contractor and shall, unless otherwise expressly provided or authorized, have no authority to act for or represent the Trust in any way or otherwise be deemed an agent of the Trust.

6. Proxy Voting. The Adviser will vote proxies relating to the Portfolio’s securities. The Adviser will vote all such proxies in accordance with such proxy voting guidelines and procedures adopted by the Board of Trustees. The Adviser may, on certain non-routine matters, consult with the Subadviser before voting proxies relating to the Portfolio’s securities. The Adviser will instruct the custodian and other parties providing services to the Trust promptly to forward to the proxy voting service copies of all proxies and shareholder communications relating to securities held by each Portfolio (other than materials relating to legal proceedings).

7. Certain Records. The Subadviser hereby undertakes and agrees to maintain, in the form and for the period required by Rule 31a-2 under the Act, all records relating to the investments of the Portfolio(s) that are required to be maintained by the Trust pursuant to the requirements of Rule 31a-1 of that Act. Any records required to be maintained and preserved pursuant to the provisions of Rule 31a-1 and Rule 31a-2 promulgated under the Act which are prepared or maintained by the Subadviser on behalf of the Trust.

The Subadviser agrees that all accounts, books and other records maintained and preserved by it as required hereby shall be subject at any time, and from time to time, to such reasonable periodic, special and other examinations by the Securities and Exchange Commission, the Trust’s auditors, the Trust or any representative of the Trust, the Adviser, or any governmental agency or other instrumentality having regulatory authority over the Trust.

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8. Reference to the Subadviser. Neither the Trust nor the Adviser or any affiliate or agent thereof shall make reference to or use the name of the Subadviser or any of its affiliates in any advertising or promotional materials without the prior approval of the Subadviser, which approval shall not be unreasonably withheld.

9. Liability of the Subadviser. (a) In the absence of willful misfeasance, bad faith, gross negligence or reckless disregard of obligations or duties (“disabling conduct”) hereunder on the part of the Subadviser (and its officers, directors/trustees, agents, employees, controlling persons, shareholders and any other person or entity affiliated with the Subadviser) the Subadviser shall not be subject to liability to the Adviser (and its officers, directors/trustees, agents, employees, controlling persons, shareholders and any other person or entity affiliated with the Adviser) or to the Trust (and its officers, directors/trustees, agents, employees, controlling persons, shareholders and any other person or entity affiliated with the Trust) for any act or omission in the course of, or connected with, rendering services hereunder, including without limitation, any error of judgment or mistake of law or for any loss suffered by any of them in connection with the matters to which this Agreement relates, except to the extent specified in Section 36(b) of the Act concerning loss resulting from a breach of fiduciary duty with respect to the receipt of compensation for services. Except for such disabling conduct, the Adviser shall indemnify the Subadviser (and its officers, directors, partners, agents, employees, controlling persons, shareholders and any other person or entity affiliated with the Subadviser) from any and all losses, claims, damages, liabilities or litigation (including reasonable legal and other expenses) arising from Subadviser’s rendering of services under this Agreement.

(b) The Subadviser agrees to indemnify and hold harmless the Adviser (and its officers, directors/trustees, agents, employees, controlling persons, shareholders and any other person or entity affiliated with the Adviser) and/or the Trust (and its officers, directors/trustees, agents, employees, controlling persons, shareholders and any other person or entity affiliated with the Trust) against any and all losses, claims, damages, liabilities or litigation (including reasonable legal and other expenses), to which the Adviser and/or the Trust and their affiliates or such directors/trustees, officers or controlling person may become subject under the Act, the 1933 Act, under other statutes, common law or otherwise, which arise from the Subadviser’s disabling conduct, including but not limited to any material failure by the Subadviser to comply with the provisions and representations and warranties set forth in Section 1 of this Agreement; provided, however, that in no case is the Subadviser’s indemnity in favor of any person deemed to protect such other persons against any liability to which such person would otherwise be subject by reasons of willful misfeasance, bad faith, or gross negligence in the performance of his, her or its duties or by reason of his, her or its reckless disregard of obligations and duties under this Agreement.

10. Permissible Interests. Trustees and agents of the Trust are or may be interested in the Subadviser (or any successor thereof) as directors/trustees, partners, officers, or shareholders, or otherwise; directors/trustees, partners, officers, agents, and shareholders of the Subadviser are or may be interested in the Trust as trustees, or otherwise; and the Subadviser (or any successor) is or may be interested in the Trust in some manner.

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11. Term of the Agreement. This Agreement shall continue in full force and effect with respect to each Portfolio until two years from the date hereof, and from year to year thereafter so long as such continuance is specifically approved at least annually (i) by the vote of a majority of those Trustees of the Trust who are not parties to this Agreement or interested persons of any such party, cast in person at a meeting called for the purpose of voting on such approval, and (ii) by the Trustees of the Trust or by vote of a majority of the outstanding voting securities of the Portfolio voting separately from any other series of the Trust.

With respect to each Portfolio, this Agreement may be terminated at any time, without payment of a penalty by the Portfolio or the Trust, by vote of a majority of the Trustees, or by vote of a majority of the outstanding voting securities (as defined in the Act) of the Portfolio, voting separately from any other series of the Trust, or by the Adviser, on not less than 30 nor more than 60 days’ written notice to the Subadviser. With respect to each Portfolio, this Agreement may be terminated by the Subadviser at any time, without the payment of any penalty, on 90 days’ written notice to the Adviser and the Trust; provided, however, that this Agreement may not be terminated by the Subadviser unless another subadvisory agreement has been approved by the Trust in accordance with the Act, or after six months’ written notice, whichever is earlier. The termination of this Agreement with respect to any Portfolio or the addition of any Portfolio to Schedule A hereto (in the manner required by the Act) shall not affect the continued effectiveness of this Agreement with respect to each other Portfolio subject hereto. This Agreement shall automatically terminate in the event of its assignment (as defined by the Act).

This Agreement will also terminate in the event that the Advisory Agreement by and between the Trust and the Adviser is terminated.

12. Severability. If any provision of this Agreement shall be held or made invalid by a court decision, statute, rule or otherwise, the remainder of this Agreement shall not be affected thereby.

13. Amendments. This Agreement may be amended by mutual consent in writing, but the consent of the Trust must be obtained in conformity with the requirements of the Act.

14. Governing Law. This Agreement shall be construed in accordance with the laws of the State of New York and the applicable provisions of the Act. To the extent the applicable laws of the State of New York, or any of the provisions herein, conflict with the applicable provisions of the Act, the latter shall control.

15. Personal Liability. The Declaration of the Trust establishing the Trust (the “Declaration”), is on file in the office of the Secretary of the Commonwealth of Massachusetts, and, in accordance with that Declaration, no Trustee, shareholder, officer, employee or agent of the Trust shall be held to any personal liability, nor shall resort be had to their private property for satisfaction of any obligation or claim or otherwise in connection with the affairs of the Trust, but the “Trust Property,” as defined in the Declaration, only shall be liable.

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16. Separate Series. Pursuant to the provisions of the Declaration, each Portfolio is a separate series of the Trust, and all debts, liabilities, obligations and expenses of a particular Portfolio shall be enforceable only against the assets of that Portfolio and not against the assets of any other Portfolio or of the Trust as a whole.

17. Confidentiality. The Subadviser will not disclose or use any records or information obtained pursuant to this Agreement in any manner whatsoever except as expressly authorized in this Agreement or as reasonably required to execute transactions on behalf of the Portfolios, and will keep confidential any non-public information obtained directly as a result of this service relationship, and the Subadviser shall disclose such non-public information only if the Adviser or the Board of Trustees has authorized such disclosure by prior written consent, or if such information is or hereafter otherwise is known by the Subadviser or has been disclosed, directly or indirectly, by the Adviser or the Trust to others becomes ascertainable from public or published information or trade sources, or if such disclosure is expressly required or requested by applicable federal or state regulatory authorities, or to the extent such disclosure is reasonably required by auditors or attorneys of the Subadviser in connection with the performance of their professional services or as may otherwise be contemplated by this Agreement. Notwithstanding the foregoing, the Subadviser may disclose the total return earned by the Portfolios and may include such total return in the calculation of composite performance information.

18. Form ADV, Part 2A & 2B. Adviser represents that Subadviser has delivered to it a copy of Part 2A and 2B of Subadviser’s current Form ADV as required by the Adviser’s Act.

19. Authorized Persons. Upon request, Adviser will provide or cause to be provided to Subadviser a list of persons authorized to give instructions under this Subadvisory Agreement. Adviser may revise the list of authorized persons from time to time by sending Subadviser a revised list. Such revised list shall be effective upon receipt by the Subadviser.

[ 20. Anti-Money Laundering Provision. Subadviser has a duty to comply with all relevant US anti-money laundering laws, regulations and rules. Subadviser must, inter alia, verify Adviser’s identity prior to providing services under the Subadvisory Agreement and report suspicious transactions to the appropriate law enforcement agencies. As of the date of this Subadvisory Agreement, Subadviser has performed sufficient due diligence to meet applicable US anti-money laundering laws, regulations and rules in all material respects.

21. Force Majeure. Notwithstanding anything in this Subadvisory Agreement to the contrary, Subadviser shall not be responsible or liable for its failure to perform under this Subadvisory Agreement or for any losses to the Portfolio(s) resulting from any event beyond the control of Subadviser or its agents, including but not limited to, nationalization, strikes, expropriation, devaluation, seizure, or similar action by any governmental authority, de facto or de jure; or enactment, promulgation, imposition or enforcement by any such governmental authority of currency restrictions, exchange controls, levies or other charges affecting the assets of the Portfolio(s); or any order or regulation of any banking or securities industry, including changes in market rules and market conditions affecting the execution or settlement of transactions; or acts of war, terrorism, insurrection or revolution; or acts of God, or any other similar event.

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22. Notices. All notices shall be in writing and deemed properly given when delivered or mailed by United States certified or registered mail, return receipt requested, postage prepaid, addressed as follows:

Subadviser:		[NAME ADDRESS]
Adviser:		SunAmerica Asset Management, LLC
		Harborside Financial Center
		0000 Xxxxx 0
		Xxxxxx Xxxx, XX 00000
		Attention:         Xxxxxxx X. Xxxxxxxx
		Senior Vice President and
		General Counsel
with a copy to:		AIG Retirement Services, Inc.
		0 XxxXxxxxxx Xxxxxx
		Xxxxxxx Xxxx
		Xxx Xxxxxxx, XX 00000-0000
		Attention:         Xxxxxxx X. Xxxxxx
		General Counsel

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IN WITNESS WHEREOF, the parties have caused their respective duly authorized officers to execute this Agreement as of the date first above written.

SUNAMERICA ASSET MANAGEMENT, LLC
By:
Name:		Xxxxx X. Xxxxxxx
Title:		President and Chief Executive Officer
THE BOSTON COMPANY ASSET MANAGEMENT, LLC
By:
Name:		[NAME]
Title:		[TITLE]

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Schedule A

Portfolio(s)		Annual Fee (as a percentage of the average daily net assets the Subadviser manages in the portfolio)
Capital Growth Portfolio1		0.30% on the first $100 million 0.25% thereafter

¹ The Subadviser shall be paid a composite fee based on the aggregate assets of the Capital Growth Portfolio of SunAmerica Series Trust and the Capital Appreciation Fund of VALIC Company II.

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