SUMMARY PROSPECTUS

JULY 29, 2013

SEASONS SERIES TRUST

MID CAP VALUE PORTFOLIO

Seasons Series Trust’s Statutory Prospectus and Statement of Additional Information dated July 29, 2013, and the most recent shareholder reports are incorporated into and made part of this Summary Prospectus by reference. The Portfolio is offered only to the separate accounts of certain affiliated life insurance companies and is not intended for use by other investors.

Before you invest, you may want to review Seasons Series Trust’s Statutory Prospectus, which contains more information about the Portfolio and its risks. You can find the Statutory Prospectus and the above-incorporated information online at https://www.sunamerica.com/prospectuses. You can also get this information at no cost by calling (800) 445-7862 or by sending an e-mail request to fundprospectus@sunamerica.com.

The Securities and Exchange Commission has not approved or disapproved these securities or passed upon the adequacy of this Prospectus. Any representation to the contrary is a criminal offense.

Investment Goal

The Portfolio’s investment goal is long-term growth of capital.

Fees and Expenses of the Portfolio

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. The Portfolio’s annual operating expenses do not reflect the separate account fees charged in the variable annuity or variable life insurance policy (“Variable Contracts”), in which the Portfolio is offered. If the separate account’s fees were shown, the Portfolio’s annual operating expenses would be higher. Please see your Variable Contract prospectus for more details on the separate account fees.

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

	Class 1			Class 2			Class 3
Management Fees		0.85	%		0.85	%		0.85	%
Service (12b-1) Fees		None			0.15	%		0.25	%
Other Expenses		0.14	%		0.14	%		0.14	%
Total Annual Portfolio Operating Expenses		0.99	%		1.14	%		1.24	%

Expense Example

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000

in the Portfolio for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. The Example does not reflect charges imposed by the Variable Contract. If the Variable Contract fees were reflected, the expenses would be higher. See the Variable Contract prospectus for information on such charges. Although your actual costs may be higher or lower, based on these assumptions and the net expenses shown in the fee table, your costs would be:

	1 Year		3 Years		5 Years		10 Years
Class 1 Shares	$	101	$	315	$	547	$	1,213
Class 2 Shares	$	116	$	362	$	628	$	1,386
Class 3 Shares	$	126	$	393	$	681	$	1,500

Portfolio Turnover

The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover may indicate higher transaction costs. These costs, which are not reflected in annual portfolio operating expenses or in the example, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 62% of the average value of its portfolio.

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SEASONS SERIES TRUST

MID CAP VALUE PORTFOLIO

Principal Investment Strategies of the Portfolio

The Portfolio attempts to achieve its investment goal by investing, under normal circumstances, at least 80% of net assets in equity securities of medium-capitalization companies selected through a value strategy. Medium-capitalization, or mid-cap, companies will generally include companies whose market capitalizations range from the market capitalization of the smallest company included in the Russell Midcap^® Index to the market capitalization of the largest company in the Russell Midcap^® Index during the most recent 12-month period. As of the most recent annual reconstitution of the Russell Midcap^® Index on June 28, 2013, the market capitalization range of the companies in the Index was $1.8 billion to $21.5 billion.

The Portfolio may also invest in equity securities of large- and small-capitalization companies, short-term investments (up to 20%), foreign securities (up to 30%), REITs and special situations. A special situation arises when, in the opinion of a subadviser, the securities of a particular issuer will be recognized and appreciate in value due to a specific development with respect to that issuer, such as a new product or process, a technological breakthrough, or a management change or other extraordinary corporate event. The subadvisers may engage in frequent and active trading of portfolio securities.

The Portfolio is actively-managed by two subadvisers. To balance the risks of the Portfolio, a portion of the Portfolio is passively-managed by the adviser who seeks to track an index or a subset of an index.

Principal Risks of Investing in the Portfolio

There can be no assurance that the Portfolio’s investment goal will be met or that the net return on an investment in the Portfolio will exceed what could have been obtained through other investment or savings vehicles. Shares of the Portfolio are not bank deposits and are not guaranteed or insured by any bank, government entity or the Federal Deposit Insurance Corporation. As with any mutual fund, there is no guarantee that the Portfolio will be able to achieve its investment goal. If the value of the assets of the Portfolio goes down, you could lose money.

The following is a summary description of the principal risks of investing in the Portfolio.

Equity Securities Risk. The Portfolio invests principally in equity securities and is therefore subject to the risk that stock prices will fall and may underperform other asset classes. Individual stock prices fluctuate from day-to-day and may decline significantly. The prices of individual stocks may be negatively affected by poor company results or other factors affecting individual prices, as well as industry and/or

economic trends and developments affecting industries or the securities market as a whole.

Medium-Capitalization Companies Risk. Securities of medium-cap companies are usually more volatile and entail greater risks than securities of large companies.

Securities Selection Risk. A strategy used by the Portfolio, or individual securities selected by the portfolio managers, may fail to produce the intended return.

Value Investing Risk. When investing in securities which are believed to be undervalued in the market, there is a risk that the market may not recognize a security’s intrinsic value for a long period of time, or that a stock judged to be undervalued may actually be appropriately priced.

Foreign Investment Risk. The value of your investment may be affected by fluctuating currency values, changing local and regional economic, political and social conditions, and greater market volatility. In addition, foreign securities may not be as liquid as domestic securities.

Indexing Risk. The passively-managed index portion of the Portfolio generally will not sell securities in its portfolio and buy different securities over the course of a year other than in conjunction with changes in its target index, even if there are adverse developments concerning a particular security, company or industry. As a result, you may suffer losses that you would not experience with an actively-managed mutual fund.

Real Estate Industry Risks. These risks include declines in the value of real estate, risks related to general and local economic conditions, overbuilding and increased competition, increases in property taxes and operating expenses, changes in zoning laws, casualty or condemnation losses, fluctuations in rental income, changes in neighborhood values, the appeal of properties to tenants and increases in interest rates. The Portfolio also could be subject to the risks of direct ownership as a result of a default on a debt security it may own. If the Portfolio has rental income or income from the disposition of real property, the receipt of such income may adversely affect its ability to retain its tax status as a regulated investment company.

Large-Capitalization Companies Risk. Large-cap companies tend to be less volatile than companies with smaller market capitalizations. In exchange for this potentially lower risk, the Portfolio’s value may not rise as much as the value of portfolios that emphasize smaller companies.

Small-Capitalization Companies Risk. Securities of small-cap companies are usually more volatile and entail greater risks than securities of large companies.

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SEASONS SERIES TRUST

MID CAP VALUE PORTFOLIO

Active Trading Risk. A strategy used whereby the Portfolio may engage in frequent trading of portfolio securities to achieve its investment goal. Active trading may result in high portfolio turnover and correspondingly greater brokerage commissions and other transaction costs for the Portfolio.

Affiliated Fund Rebalancing Risk. The Portfolio may be an investment option for other mutual funds for which SAAMCo serves as investment adviser that are managed as “fund of funds.” From time to time, the Portfolio may experience relatively large redemptions or investments due to the rebalancing of a fund of funds. In the event of such redemptions or investments, the Portfolio could be required to sell securities or to invest cash at a time when it is not advantageous to do so.

Market Risk. The Portfolio’s share price can fall because of weakness in the broad market, a particular industry, or specific holdings. The market as a whole can decline for many reasons, including adverse political or economic developments in the U.S. or abroad, changes in investor psychology, or heavy institutional selling. The prospects for a sector, an industry or an issuer may deteriorate because of a variety of factors, including disappointing earnings or changes in the competitive environment. In addition, the adviser’s or a subadviser’s assessment of companies held in the Portfolio may prove incorrect, resulting in losses or poor performance even in a rising market. Finally, the Portfolio’s investment approach could fall out of favor with the investing public, resulting in lagging performance versus other comparable portfolios. The value of a security may decline for a number of reasons directly related to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods and services.

Performance Information

The following Risk/Return Bar Chart and Table illustrate the risks of investing in shares of the Portfolio by showing changes in the Portfolio’s performance from calendar year to calendar year and comparing the Portfolio’s average annual returns to those of the Russell Midcap^® Value Index. Fees and expenses incurred at the contract level are not reflected in the bar chart or table. If these amounts were reflected, returns would be less than those shown. Of course, past performance is not necessarily an indication of how the Portfolio will perform in the future.

Effective December 1, 2009, SunAmerica Asset Management Corp. (“SAAMCo”) assumed management of the passively-managed portion of the Portfolio, which portion was previously managed by AIG Global Investment Corp.

(Class 1 Shares)

During the 10-year period shown in the bar chart, the highest return for a quarter was 20.57% (quarter ended September 30, 2009) and the lowest return for a quarter was -23.84% (quarter ended December 31, 2008). The year-to-date calendar return as of June 30, 2013 was 14.91%.

Average Annual Total Returns (For the periods ended December 31, 2012)

	1 Year			5 Years			10 Years
Class 1 Shares		16.68	%		2.41	%		8.82	%
Class 2 Shares		16.51	%		2.25	%		8.65	%
Class 3 Shares		16.41	%		2.15	%		8.54	%
Russell Midcap® Value Index		18.51	%		3.79	%		10.63	%

Investment Adviser

The Portfolio’s investment adviser is SAAMCo. The Portfolio is subadvised by Goldman Sachs Asset Management, LP (“GSAM”) and Lord, Abbett & Co. LLC (“Lord Abbett”), and a portion of the Portfolio is managed by SAAMCo. The managers are noted below

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SEASONS SERIES TRUST

MID CAP VALUE PORTFOLIO

Portfolio Managers

Name	Portfolio Manager of the Portfolio Since	Title
SAAMCo
Timothy Campion	2012	Vice President and Portfolio Manager
GSAM
Andrew Braun	2002	Managing Director, Portfolio Manager and Co-Chief Investment Officer-Value Equity
Sean Gallagher	2002	Managing Director, Portfolio Manager and Co-Chief Investment Officer-Value Equity
Dolores Bamford, CFA	2002	Managing Director and Portfolio Manager
Lord Abbett
Robert P. Fetch, CFA	2009	Partner and Director
Jeff Diamond, CFA	2008	Portfolio Manager

Purchases and Sales of Portfolio Shares

Shares of the Portfolio may only be purchased or redeemed through Variable Contracts and variable life insurance policies offered by the separate accounts of participating life insurance companies. Shares of the Portfolio may be purchased and redeemed each day the New York Stock Exchange is open, at the Portfolio’s net asset value determined after receipt of a request in good order.

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

Tax Information

The Portfolio will not be subject to U.S. federal income tax on the net investment company taxable income or net capital gains distributed to shareholders as ordinary income dividends or capital gain dividends; however, you may be subject to federal income tax (and a federal Medicare tax of 3.8% that applies to net investment income, including taxable annuity payments, if applicable) upon withdrawal from such tax deferred arrangements. Contractholders should consult the prospectus (or other offering document) for the Variable Contract for additional information regarding taxation.

Payments to Broker-Dealers and

Other Financial Intermediaries

The Portfolio is not sold directly to the general public but instead are offered as an underlying investment option for Variable Contracts. The Portfolio and its related companies may make payments to the sponsoring insurance company (or its affiliates) for distribution and/or other services. These payments may create a conflict of interest as they may be a factor that the insurance company considers in including the Portfolio as underlying investment options in the Variable Contract. The prospectus (or other offering document) for your Variable Contract may contain additional information about these payments.

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