FINANCIAL HIGHLIGHTS

The table below sets forth certain financial information for the periods indicated, including per share information results for a single I Share of the Fund. The term “Total investment return” indicates how much your investment would have increased or decreased during this period of time and assumes that you have reinvested all dividends and distributions. This information has been derived from the Fund’s financial statements audited by [               ], the Fund’s independent registered public accounting firm. This information should be read in conjunction with the Fund’s financial statements which, together with the report of the independent registered public accounting firm, are included in the Fund’s annual report, which is available upon request (see back cover for ordering instructions).

(1)  The Fund commenced investment operations on September 30, 2010.

(2)  Calculated based on average shares outstanding for the period.

(3)  The amount shown may not correlate with the change in the aggregate gains and losses presented on the Statement of Operations due to the timing of sales and purchases of the Fund’s shares in relation to fluctuating market values for the Fund’s portfolio.

(4)  Total investment return is calculated assuming a purchase of shares on the first day and a sale of shares on the last day of each period reported and includes reinvestments of dividends and distributions, if any.

(5)  Annualized.

(6)  Not Annualized

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S1 Fund

of
The RBB Fund, Inc.

(1-866-882-1226)
www.S1Fund.com

For More Information:

This Prospectus contains important information you should know before you invest. Read it carefully and keep it for future reference. More information about the S1 Fund is available free of charge, upon request, including:

Annual/Semi-Annual Reports

These reports contain additional information about the Fund’s investments, describe the Fund’s performance, list portfolio holdings, and discuss recent market conditions and economic trends. The annual report includes fund strategies that significantly affected the Fund’s performance during its last fiscal year.

When available, the annual and semi-annual reports to shareholders may be obtained by visiting www.S1Fund.com

S1 Fund

of The RBB Fund, Inc.

Ticker Symbol: SONRX

R Shares

Prospectus

December 31, 2012

i

2

SUMMARY SECTION

If at any time during the first three years the Fund’s Advisory Agreement with the Adviser is in effect, the Fund’s Total Annual Fund Operating Expenses for that year are less than 3.20%, the Adviser is entitled to reimbursement by the Fund of the advisory fees forgone and other payments remitted by the Adviser to the Fund during such three-year period if such reimbursement by the Fund does not cause the Fund to exceed existing expense limitations.

Example

This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.

The Example assumes that you invest $10,000 in the Fund 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 Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Portfolio Turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in Total Annual Fund Operating Expenses or in the Example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was [  ]%.

credit quality or maturity of debt securities. These securities can be rated investment grade, rated below investment grade, or high yield securities (also known as “junk bonds”), which are below Baa3 by Moody’s, BBB- by S&P or BBB- by Fitch or unrated. The Fund may invest in securities of the lowest rating category, including securities in default. There is no limit to the amount the Fund may invest in junk bonds. The Sub-Advisers may make margin purchases of securities and, in connection with the purchases, borrow money from banks and other financial institutions for investment purposes. The Sub-Advisers may also sell securities short, which is a form of leverage.

The Adviser has primary responsibility for allocating Fund assets in a manner that attempts to diversify the Fund’s portfolio across multiple strategies and investment styles that the Adviser believes are complementary and, when combined, will produce enhanced risk-adjusted returns. The Adviser reviews a range of qualitative and quantitative factors when determining the allocations and reallocations to Sub-Advisers, including, but not limited to, the Sub-Adviser’s style, historical performance and the characteristics of each Sub-Adviser’s allocated assets (including investment process and statistical analysis). The Adviser will allocate Fund assets among strategies of the Sub-Advisers that it believes offer the potential for attractive long-term investment returns individually and are expected to blend within the Fund’s portfolio so that it will have low correlation and low volatility relative to the broader stock and bond markets. The Adviser may direct a Sub-Adviser to reduce or limit its investment in certain assets or asset classes in order to achieve the desired composition of the Fund’s overall portfolio. The Adviser retains the discretion to invest the Fund’s assets in securities and other instruments directly and may do so in certain circumstances including pending allocation to a Sub-Adviser, to hedge against overall Fund exposure created by the Sub-Advisers, or to increase or reduce the Fund’s exposure to a particular issuer, sector, industry or general market risk, including interest rate risk.

·    Asset-Backed Securities. The risks of investing in asset-backed securities include interest rate risk, prepayment risk and the risk that the Fund could lose money if there are defaults on the loans underlying these securities.

·    Mortgaged-Backed Securities. The risks of investing in mortgaged-backed securities include interest rate risk, prepayment risk and the risk that the Fund could lose money if there are defaults on the mortgage loans underlying these securities.

·    High Yield Debt Obligations. The Fund may invest in high yield debt obligations, such as bonds and debentures, issued by corporations and other business organizations. An issuer of debt obligations may default on its obligation to pay interest and repay principal. Also, changes in the financial strength of an issuer or changes in the credit rating of a security may affect its value. Such high yield debt obligations are referred to as “junk bonds” and are not considered to be investment grade.

·    Foreign Investments. International investing is subject to special risks, including currency exchange rate volatility, political, social or economic instability, and differences in taxation, auditing and other financial practices.

·    Emerging Markets. Investment in emerging market securities involves greater risk than that associated with investment in foreign securities of developed foreign countries. These risks include volatile currency exchange rates, periods of high inflation, increased risk of default, greater social, economic and political uncertainty and instability, less governmental supervision and regulation of securities markets, weaker auditing and financial reporting standards, lack of liquidity in the markets, and the significantly smaller market capitalizations of emerging market issuers.

·    Leverage. The Fund may make margin purchases of securities and, in connection with the purchases, borrow money from banks and other financial institutions for investment purposes. The Fund may also engage in selling securities short, which is a form of leverage. Although the use of leverage by the Fund may create an opportunity for increased return, it also results in additional risks and can magnify the effect of any losses. There is no assurance that the use of leverage as an investment strategy will be successful.

·    Derivatives. The Fund’s investments in derivative instruments such as options, forward currency exchange contracts, swaps and futures, which may be leveraged, may result in losses. Investments in derivative instruments may result in losses exceeding the amounts invested.

·    Commodity Sector Risk. Exposure to the commodities markets may subject the Fund to greater volatility than investments in traditional securities. The value of commodity-linked derivative instruments may be affected by changes in overall market movements, commodity index volatility, changes in interest rates, or factors affecting a particular industry or commodity, such as drought, floods, weather, livestock disease, embargoes, tariffs and international economic, political and regulatory developments. The prices of energy, industrial metals, precious metals, agriculture and livestock sector commodities may fluctuate widely due to factors such as changes in value, supply and demand and governmental regulatory policies. The commodity-linked securities in which the Fund invests may be issued by companies in the financial services sector, and events affecting the financial services sector may cause the Fund’s share value to fluctuate.

·    Convertible Securities. Securities that can be converted into common stock, such as certain securities and preferred stock, are subject to the usual risks associated with fixed income investments, such as interest rate risk and credit risk. In addition, because they react to changes in the value of the equity securities into which they will convert, convertible securities are also subject to the risks associated with equity securities.

·    Valuation. Portfolio securities that have been valued using techniques other than market quotations may have valuations that are different from those produced using market quotations, and the security may be sold at a discount to the value established by the Fund.

·    Redemptions. The Fund could experience a loss when selling securities to meet redemption requests by shareholders if the redemption requests are unusually large or frequent, occur in times of overall market turmoil or declining prices for the securities sold, or when the securities the Fund wishes to or is required to sell are illiquid.

·    Portfolio Turnover. The Fund frequently trades its portfolio securities. High portfolio turnover will cause the Fund to incur higher brokerage commissions and transaction costs, which could lower the Fund’s performance. In addition to lower performance, high portfolio turnover could result in taxable capital gains.

·    Exchange Traded Funds. ETFs are a type of investment company bought and sold on a securities exchange. An ETF represents a fixed portfolio of securities designed to track a particular market index. The risks of owning an ETF generally reflect

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the risks of owning the underlying securities that the ETF is designed to track, although lack of liquidity in an ETF could result in its being more volatile. The Fund may incur brokerage fees in connection with its purchase of ETF shares.

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You can only purchase and redeem Shares of the Fund on days the New York Stock Exchange is open. Shares of the Fund may be available through certain brokerage firms, financial institutions and other industry professions (collectively, “Service Organizations”). Shares of the Fund may also be purchased and redeemed directly through The RBB Fund, Inc. by the means described below.

Credit Biased

These strategies invest primarily in the following sectors: secured leveraged loans, high yield bonds, distressed debt, structured credit, and global debt (typically less efficient areas of the global fixed income markets than traditional fixed income strategies). Generally these sectors may include wide credit rating ranges (including leveraged buyouts), may include distressed debt strategies and may include restricted securities and securities that may not be registered for which a market may not be readily available.

Mortgage Backed Securities

This strategy is designed to exploit perceived mispricings in mortgage back securities. Such mispricings can result from periods of market illiquidity and distress or from analytical anomalies. The strategy will invest in both conventional and complex mortgage backed securities.

Opportunistic Equities

This strategy is designed to capitalize on underpriced equity securities or on positive market trends and may focus in certain securities markets, industries, company sizes, or geographical areas. Strategies are primarily managed for absolute return and Sub-Advisers assess risk and opportunity on an absolute, not an index-relative basis, by focusing on relatively few investments that the manager believes are undervalued and either offer a margin-of-safety, or offer high growth opportunities. Selective hedging through the use of short sales or options may be utilized to manage risk exposure. Strategies may also focus on special situations or events, including distressed equities.

decline in value of the security should be wholly or partially offset by a corresponding gain in the short position. Any potential gains in the security, however, would be wholly or partially offset by a corresponding loss in the short position. Short sales that are not “against the box” involve a form of investment leverage, and the amount of the Fund’s loss on a short sale is potentially unlimited.

Equity and Equity-Related Securities. The Fund invests in all types of equity securities. Equity securities include exchange-traded and over-the-counter common and preferred stocks, warrants, rights, convertible securities, depositary receipts and shares, trust certificates, limited partnership interests, shares of other investment companies and real estate investment trusts (“REITs”), and equity participations. The number of issuers in the Fund’s portfolio will vary over time.

Fixed Income Investments. The Fund invests a portion of its assets in fixed income securities. Fixed income investments include bonds, notes (including structured notes), mortgage-backed securities, asset-backed securities, convertible securities, Eurodollar and Yankee dollar instruments, preferred stocks and money market instruments. Fixed income securities may be issued by corporate and governmental issuers and may have all types of interest rate payment and reset terms, including (without limitation) fixed rate, adjustable rate, zero coupon, contingent, deferred, payment-in-kind and auction rate features. The principal debt investments of the Fund will be fixed and floating rate securities with no reset terms.

The credit quality of securities held in the Fund’s portfolio is determined at the time of investment. If a security is rated differently by multiple ratings organizations, the Fund treats the security as being rated in the higher rating category.

Mortgage-Backed Securities. Mortgage-backed securities may be issued by private companies or by agencies of the U.S. government. Mortgage-backed securities represent direct or indirect participation in, or are collateralized by and payable from, mortgage loans secured by real property.

Certain debt instruments may only pay principal at maturity or may only represent the right to receive payments of principal or payments of interest on underlying pools of mortgage or government securities, but not both. The value of these types of instruments may change more drastically than debt securities that pay both principal and interest during periods of changing interest rates. Principal only mortgage-backed securities are particularly subject to prepayment risk. The Fund may obtain a below market yield or incur a loss on such instruments during periods of declining interest rates. Interest only instruments are particularly subject to extension risk, i.e. the risk that an issuer will exercise its right to pay later than expected. This may occur when there is a rise in interest rates. Mortgage derivatives and structured securities often employ features that have the effect of leverage. As a result, small changes in interest or prepayment rates may cause large and sudden price movements, especially compared to an investment in a security that is not leveraged. Mortgage derivatives can also become illiquid and hard to value in declining markets.

Mortgage-backed securities that are collateralized by a portfolio of mortgages or mortgage-related securities depend on the payments of principal and interest made by or through the underlying assets, which may not be sufficient to meet the payment obligations of the mortgage-backed securities. Prepayments of principal, which occur more frequently in falling interest rate conditions, may shorten the term and reduce the value of these securities. The quality and value of the underlying collateral may decline, or default, which has become a significant risk for collateral related to sub-prime mortgage loans, especially in a declining residential real estate market. Further, these securities generally are privately sold and may not be readily marketable, particularly after a rapid decrease in value. Investments in mortgage-backed securities may also be subject to valuation risk.

The Fund may also use mortgage dollar rolls to finance the purchase of additional investments. Dollar rolls expose the Fund to the risk that it will lose money if the additional investments do not produce enough income to cover the Fund’s dollar roll obligations. In addition, if the Adviser’s or Sub-Advisers’ prepayment assumptions are incorrect, the Fund may have performed better had the Fund not entered into the mortgage dollar roll. Unless covered, investing in dollar rolls creates leverage and dollar rolls are subject to the general risks involved in leveraging.

Foreign Securities. The Fund may invest in securities of foreign issuers that are traded or denominated in U.S. dollars (including equity securities of foreign issuers trading in U.S. markets) through American Depositary Receipts (“ADRs”), Global Depositary Receipts (“GDRs”), European Depositary Receipts (“EDRs”) or International Depositary Receipts (“IDRs”). In addition, the Fund may invest in securities traded or denominated in foreign currencies and in multinational currencies such as the Euro. The Fund will value its securities and other assets in U.S. dollars. Investments in securities of foreign entities and securities denominated or traded in foreign currencies involve special risks. These include possible political and economic instability and the possible imposition of exchange controls or other restrictions on investments. Changes in foreign currency rates relative to the U.S. dollar will affect the U.S. dollar value of the Fund’s assets denominated or quoted in currencies other than the U.S. dollar. Emerging market investments offer the potential for significant gains but also involve greater risks than

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investing in more developed countries. Political or economic instability, lack of market liquidity and government actions such as currency controls or seizure of private business or property may be more likely in emerging markets.

Valuation. Portfolio securities may be valued using techniques other than market quotations. The value established for a portfolio security may be different than what would be produced through the use of another methodology or if it had been priced using market quotations. Portfolio securities that are valued using techniques other than market quotations, including “fair valued” securities, may be subject to greater fluctuation in their value from one day to the next than would be the case if market quotations were used. In addition, there is no assurance that the Fund could sell a portfolio security for the value established for it at any time and it is possible that the Fund would incur a loss because a portfolio security is sold at a discount to its established value.

Interest Rate Risk. During periods of rising interest rates, the market value of the Fund’s fixed-income securities will tend to be lower than prevailing market interest rates. In periods of falling interest rates, the market value of the Fund’s fixed-income securities generally will tend to be higher than prevailing market interest rates. Prices of longer-term fixed income securities are typically more sensitive to changes in interest rates than prices of shorter-term fixed-income securities.

Credit/Default Risk. The credit rating of an issuer or guarantor of a security in which the Fund invests may be lowered or an issuer or guarantor of a security or the counterparty to a derivatives contract or a repurchase agreement may default on its payment obligations.

Liquidity Risk. Liquidity risk exists when particular investments are difficult to purchase or sell. The Fund’s investments in illiquid securities may reduce the returns of the Fund because it may be unable to sell the illiquid securities at an advantageous time or price. Liquid securities may also become illiquid because of market events or uncertainties. Illiquidity can be caused by a drop in overall market trading volume, an inability to find a ready buyer, or legal restrictions on the securities’ resale. Certain securities that were liquid when purchased may later become illiquid, particularly in times of overall economic distress.

Leveraging Risks. The use of leverage by the Adviser and Sub-Advisers may increase the volatility of the Fund. These leveraged instruments may result in losses to the Fund or may adversely affect the Fund’s net asset value or total return, because instruments that contain leverage are more sensitive to changes in interest rates. The Fund may also use borrowed funds to create leverage. Although the use of leverage by the Fund may create an opportunity for increased return, it also results in additional risks and can magnify the effect of any losses. If the income and gains earned on the securities and instruments purchased with leverage proceeds are greater than the cost of the leverage, the Fund’s return will be greater than if leverage had not been used. Conversely, if the income and gains from the securities and instruments purchased with such proceeds does not cover the cost of leverage, the Fund’s return will be less than if leverage had not been used. In the event of a sudden, precipitous drop in value of the Fund’s assets, the Fund may not be able to liquidate assets quickly enough to pay off its borrowing. Short sales of securities also involve the use of leverage. Using this investment technique may adversely affect the Fund’s net asset value or total return.

To limit leverage risk, the Fund will segregate assets determined by the Adviser to be liquid in accordance with procedures established by the Board of Directors, or, when permissible, enter into offsetting transactions, to cover its obligations resulting from its use of derivative instruments. Securities held in a segregated account cannot be sold while the futures contract, option or other derivative is outstanding, unless they are replaced with other suitable assets. As a result, it is possible that segregating a large percentage of the Fund’s assets could impede portfolio management or its ability to meet redemption requests or other current obligations.

Interest Rate Swaps, Total Return Swaps, Credit Default Swaps, Options on Swaps and Interest Rate Caps, Floors and Collars.

·    Interest rate swaps involve the exchange by the Fund with another party of their respective commitments to pay or receive interest, such as an exchange of fixed-rate payments for floating rate payments.

·    Total return swaps are contracts that obligate a party to pay or receive interest in exchange for payment by the other party of the total return generated by a security, a basket of securities, an index, or an index component.

·    Credit default swaps are contracts whereby one party makes periodic payments to a counterparty in exchange for the right to receive from the counterparty a payment equal to the par (or other agreed-upon) value of a referenced debt obligation in the event of a default by the issuer of the debt obligation.

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·    Options on swaps (“swaptions”) are options to enter into a swap agreement. The Fund may also purchase and write (sell) swaptions. Like other types of options, the buyer of a swaption pays a non-refundable premium for the option and obtains the right, but not the obligation, to enter into an underlying swap on agreed-upon terms. The seller of a swaption, in exchange for the premium, becomes obligated (if the option is exercised) to enter into an underlying swap on agreed-upon terms.

·    Interest rate caps entitle the purchaser, to the extent that a specified index exceeds a predetermined interest rate, to receive payment of interest on a notional principal amount from the party selling such interest rate cap.

·    Interest rate floors entitle the purchaser, to the extent that a specified index falls below a predetermined interest rate, to receive payments of interest on a notional principal amount from the party selling the interest rate floor.

·    Interest rate collars combine a cap and a floor that are designed to preserve a certain return within a predetermined range of interest rates.

The Fund may enter into the transactions described above for hedging purposes or to seek to increase total return (which is considered a speculative activity). The use of swaps, swaptions, and interest rate caps, floors and collars is a highly specialized activity which involves investment techniques and risks different from those associated with ordinary portfolio securities transactions. If the Adviser or a Sub-Adviser is incorrect in its forecasts of market values and interest rates, the investment performance of the Fund would be less favorable than it would have been if these investment techniques were not used.

Counterparties. To the extent the Fund invests in loans or securities traded over-the-counter, swaps, “synthetic” or derivative instruments, repurchase agreements, certain types of options or other customized financial instruments, the Fund takes the risk of non-performance by the other party to the contract. This risk may include credit risk of the counterparty and the risk of settlement default. This risk may differ materially from those entailed in exchange-traded transactions that generally are supported by guarantees of clearing organizations, daily marking-to-market and settlement, and segregation and minimum capital requirements applicable to intermediaries. Transactions entered directly between two counterparties generally do not benefit from such protections and expose the parties to the risk of counterparty default.

Convertible Securities Risk. Convertible securities have characteristics of both equity and fixed-income securities. The value of a convertible security tends to move with the market value of the underlying stock, but may also be affected by interest rates, credit quality of the issuer and any call provisions. In particular, when interest rates rise, fixed-income securities will decline in value. Convertible securities frequently have speculative characteristics and may be acquired without regard to minimum quality ratings. Lower quality convertible securities, also known as “junk bonds,” involve greater risk of default or price changes due to the issuer’s creditworthiness. The market prices of these securities may fluctuate more than those of higher quality securities and may decline significantly in periods of general economic difficulty, which may follow periods of rising interest rates. Securities in the lowest quality category may present the risk of default, or may be in default.

Tax Risk. The Fund may seek to gain exposure to the commodity markets through investments in commodity-linked notes. The Fund has not requested or received a ruling from the Internal Revenue Service (“IRS”) regarding their treatment for purposes of the Fund’s qualification as a regulated investment company under the Internal Revenue Code (“Code”). Additionally, the tax treatment of commodity-linked notes and other commodity-linked derivatives may be adversely affected by future legislation, U.S. Treasury Regulations and/or guidance issued by the IRS that could affect the character, timing and/or amount of the Fund’s taxable income or any gains and distributions made by the Fund.

Exchange-Traded Funds (ETFs). The Fund may invest up to 25% of its assets in ETFs. ETFs are registered investment companies whose shares are listed and traded on U.S. stock exchanges or otherwise traded in the over-the-counter market. In general, ETFs seek to track a specified securities index or a basket of securities that an “index provider,” such as Standard & Poor’s, selects as representative of a market, market segment or industry sector. An ETF portfolio generally holds the same stocks or bonds as the index it tracks or it may hold a representative sample of such securities. Thus, an ETF is designed so that its performance will correspond closely with that of the index it tracks. As a shareholder in an ETF, the Fund will bear its pro rata portion of an ETF’s expenses, including advisory fees, in addition to its own expenses.

Other Investment Companies. The Fund may invest up to 10% of its total assets in the securities of other investment companies, but may not invest more than 5% of its total assets in the securities of any one investment company or acquire more than 3% of the voting securities of any other investment company. Among other things, the Fund may invest in money market mutual funds for cash management purposes by “sweeping” excess cash balances into such funds until the cash is invested or otherwise utilized. The Fund will indirectly bear its proportionate share of any management fees and other expenses paid by investment companies in which it invests in addition to the advisory and administration fees paid by the Fund.

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Redemptions. The Fund may need to sell its holdings in order to meet shareholder redemption requests. The Fund could experience a loss when selling securities to meet redemption requests if the redemption requests are unusually large or frequent, occur in times of overall market turmoil or declining prices for the securities sold, or when the securities the Fund wishes to or is required to sell are illiquid. The Fund may be unable to sell illiquid securities at its desired time or price. Illiquidity can be caused by a drop in overall market trading volume, an inability to find a ready buyer, or legal restrictions on the securities’ resale. Certain securities that were liquid when purchased may later become illiquid, particularly in times of overall economic distress.

Portfolio Turnover. The Fund may engage in active and frequent trading, resulting in high portfolio turnover. This may lead to the realization and distribution to shareholders of higher capital gains, increasing their tax liability. Frequent trading may also increase transaction costs, which could detract from the Fund’s performance.

Temporary Investments. The Fund may depart from its principal investment strategy in response to adverse market, economic, political or other conditions by taking temporary defensive positions (up to 100% of its assets) in all types of money market and short-term debt securities. If the Fund were to take a temporary defensive position, it may be unable for a time to achieve its investment objective.

Disclosure of Portfolio Holdings

A description of the Company’s policies and procedures with respect to the disclosure of the Fund’s portfolio securities is available in the SAI. The SAI is incorporated herein.

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Columbia Business School in 1990 and a BA degree from Vanderbilt University in 1985. Blue Lion employs a long/short equity strategy with a value-oriented bias in managing its portion of the Fund. The Fund is the only mutual fund for which the Sub-Adviser provides advisory services.

Courage Capital Management, LLC (“Courage Capital”) , a registered investment adviser located at 4400 Harding Road, Ste. 503, Nashville, Tennessee 37205, has served as a Sub-Adviser to the Fund since its inception. Courage Capital was founded in 1998 by Richard C. Patton, who is also the portfolio manager primarily responsible for the day-to-day management of the portion of the Fund sub-advised by Courage Capital. Mr. Patton is also Chief Investment Adviser of Courage Capital. Prior to founding Courage Capital, Mr. Patton co-founded and operated Woodmont Capital, LLC. Mr. Patton serves on the American Red Cross Board of Governors. Mr. Patton earned a B.S. in Economics from Vanderbilt University and an M.B.A. from Harvard Business School. Courage Capital employs an event driven investment strategy, including investments in special situations companies and distressed securities, in managing its portion of the Fund. The Fund is the only mutual fund for which the Sub-Adviser provides advisory services.

Lauren Templeton Capital Management, LLC (“LT”) , a registered investment adviser located at 633 Chestnut Street, Suite 820, Chattanooga, TN 37450, has served as a Sub-Adviser to the Fund since its inception. LT was founded in 2001 by Lauren C. Templeton. Ms. Templeton and Scott Phillips have responsibility for the day-to-day management of the portion of the Fund sub-advised by LT. Ms. Templeton is managing member and Chief Compliance Officer of LT. Ms. Templeton is also founder and director of the Southeastern Hedge Fund Association. In addition to these responsibilities Ms. Templeton also serves the following organizations; The Atlanta Hedge Fund Roundtable (President), the Board of Trustees at the Baylor School, the Pre-Business Advisory Council at the University of the South, Sewanee (Board Member), and the Finance Advisory Board of the University of Tennessee Chattanooga. Ms. Templeton is a published book author having written “Investing the Templeton Way” released by McGraw Hill in 2008. Investing the Templeton Way is a value investor’s guide to the successful methods employed by her mentor, Sir John Templeton. Ms. Templeton received a B.A. in Economics from the University of the South. Mr. Phillips joined LT in 2007 and serves as Portfolio Manager and Head of Research. Prior to joining LT, Mr. Phillips founded Cumberland Capital Corp, located in Chattanooga, Tennessee in 2004, where he provided equity research services to Green Cay Asset Management, a hedge fund management company located in Nassau, Bahamas. Mr. Phillips received his B.A. in English from the University of the South. Mr. Phillips co-authored “Investing the Templeton Way.” LT uses a global value investment strategy in managing its portion of the Fund. The Fund is the only mutual fund for which the Sub-Adviser provides advisory services.

Maerisland Capital, LLC (“Maerisland”) , a registered investment adviser located at 500 Newport Center Drive, Suite 600, Newport Beach, CA 92660, has served as a Sub-Adviser to the Fund since January 1, 2012. Maerisland was formed in September of 2011 by Mark Beder, who is also the portfolio manager primarily responsible for the day-to-day management of the portion of the Fund sub-advised by Maerisland. Mr. Beder has over 18 years of investment experience as a fundamental, bottoms-up investor and has managed global equity portfolios with long-only, market-neutral and long/short hedged strategies. Prior to forming Maerisland, Mr. Beder was a partner with the Tremblant Capital Group (“Tremblant”) from September 1, 2005 through 2010. Mr. Beder was the founding member and sole portfolio manager of the Tremblant-Trident Funds. Following Tremblant’s restructuring in late 2008, Mr. Beder was named a partner at Tremblant, managed a generalist book within Tremblant’s main fund, and served on the Investment and the Risk Management Committees. Prior to his work at Tremblant, Mr. Beder was a co-founder and co-portfolio manager of KiCap Management Funds (“KiCap”), series market neutral hedge funds. Mr. Beder and his co-portfolio manager at KiCap began their work together while co-heading the global telecom and media team at Tiger Management, LLC. Mr. Beder and his partner managed a book of over $300 million of assets within Tiger Management’s main fund. Prior to joining Tiger Management in 1999, Mr. Beder spent 6 years with The Capital Group Companies where he managed a $1.4 billion global telecom portfolio and was the lead manager to an additional $6 billion in global telecom assets. Prior to entering the investment industry, Mr. Beder was a Lieutenant Commander and Assault Team Leader with the United States Navy SEAL Team. Mr. Beder holds a Masters of Business Administration degree from the Harvard Business School and a Bachelor of Science degree in Mechanical Engineering from the Massachusetts Institute of Technology. Mr. Beder serves as a Trustee for Harbor Day School and is a Board Member for Second Harvest Food Bank of Orange County. Maerisland uses a long/short global investment strategy that focuses on proprietary research in managing its portion of the Fund.

Starwood Real Estate Securities, LLC (“SRES”) , a registered investment adviser located at 591 West Putnam Avenue, Greenwich, Connecticut 06830, has served as a Sub-Adviser to the Fund since its inception. SRES was launched in 2004. SRES is jointly owned by Barry Sternlicht, Chairman and Advisor, and Matthew C. Gilman, Chief Executive Officer and Portfolio Manager. Over the past 19 years, Mr. Sternlicht has structured more than 400 investment transactions with an asset value of more than $40 billion. From 1995 through 2005, Mr. Sternlicht was Chairman and CEO of Starwood Hotels & Resorts Worldwide, Inc., a company he founded in 1995. Mr. Gilman is the portfolio manager primarily responsible for the day-to-day management of the portion of the Fund sub-advised by SRES. Mr. Gilman joined Starwood Real Estate Securities LLC at its founding in 2004. From 1999 to 2004, Mr. Gilman was Senior Portfolio Manager at ABP Investments US, Inc., the US subsidiary of the Dutch Civil Service Pension Fund, regarded as one of the largest in the world. Mr. Gilman covered real estate securities at

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JP Morgan Investment Management from 1995 to 1999 and for one year at Genesis Realty Advisors from 1994 to 1995. Mr. Gilman began his career at Wellsford Residential Properties in 1992, a multi-family real estate investment trust. Mr. Gilman is a graduate of Dartmouth College and is a member of the National Association of Real Estate Investment Trusts. SRES employs a long/short equity investment strategy, with a focus on public real estate securities, in managing its portion of the Fund. The Fund is the only mutual fund for which the Sub-Adviser provides advisory services.

Trellus Management Co., LLC (“Trellus”) , a registered investment adviser located at 350 Madison Avenue, New York, New York 10017 has served as a Sub-Adviser to the Fund since its inception. Trellus was founded in 1994 by Adam Usdan, the sole owner of Trellus. Mr. Usdan is the portfolio manager primarily responsible for the day-to-day management of the portion of the Fund sub-advised by Trellus. Mr. Usdan is the President, Chief Investment Officer and Portfolio Manager of Trellus. Mr. Usdan earned an MBA in Finance, Accounting & Marketing from the Kellogg Graduate School of Management, Northwestern University and a BA in English, from Wesleyan University. Trellus employs a long/short equity investment strategy in managing its portion of the Fund. The Fund is the only mutual fund for which the Sub-Adviser provides advisory services.

The SAI provides additional information about the portfolio managers’ compensation, other accounts managed by the portfolio managers and the portfolio managers’ ownership of securities in the Fund.

A discussion regarding the basis for the Company’s Board of Directors approval of the Fund’s investment advisory agreement with the Adviser and sub-advisory agreements with the Sub-Advisers is available in the Fund’s annual report for the year ended August 31, 2012 (except for Maerisland). The discussion regarding the basis for the Company’s Board of Directors approval of the Fund’s sub-advisory agreement with Maerisland is in the Fund’s semi-annual report for the period ended February 29, 2012.

Marketing Arrangement

The Adviser or its affiliates may pay additional compensation, out of profits derived from the Adviser’s management fee and not as an additional charge to the Fund, to certain financial institutions (which may include banks, securities dealers and other industry professionals) for the sale and/or distribution of Fund shares or the retention and/or servicing of Fund investors and Fund shares (“revenue sharing”). These payments are in addition to any distribution or servicing fees payable under a 12b-1 distribution and/or service plan of the Fund, any record keeping or sub-transfer agency fees payable by the Fund, or other fees described in the fee table or elsewhere in the Prospectus or SAI. Examples of “revenue sharing” payments include, but are not limited to, payment to financial institutions for “shelf space” or access to a third party platform or fund offering list or other marketing programs, including, but not limited to, inclusion of the Fund on preferred or recommended sales lists, mutual fund “supermarket” platforms and other formal sales programs; granting the Adviser access to the financial institution’s sales force; granting the Adviser access to the financial institution’s conferences and meetings; assistance in training and educating the financial institution’s personnel; and obtaining other forms of marketing support. The level of revenue sharing payments made to financial institutions may be a fixed fee or based upon one or more of the following factors: gross sales, current assets and/or number of accounts of the Fund attributable to the financial institution, or other factors as agreed to by the Adviser and the financial institution or any combination thereof. The amount of these revenue sharing payments is determined at the discretion of the Adviser from time to time, may be substantial, and may be different for different financial institutions depending upon the services provided by the financial institution. Such payments may provide an incentive for the financial institution to make shares of the Fund available to its customers and may allow the Fund greater access to the financial institution’s customers.

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financial intermediary. It is currently expected that a shareholder would receive notice that its purchase order or exchange has been rejected within 48 hours after such purchase order or exchange has been received by the Company in good order. The Company and the Adviser will not be liable for any loss resulting from rejected purchase orders. To minimize harm to the Company and its shareholders (or the Adviser), the Company (or the Adviser) will exercise its right if, in the Company’s (or the Adviser’s) judgment, an investor has a history of excessive trading or if an investor’s trading, in the judgment of the Company or the Adviser, has been or may be disruptive to the Fund. No waivers of the provisions of the policy established to detect and deter market timing and other excessive trading activity are permitted that would harm the Fund and its shareholders or would subordinate the interests of the Fund and its shareholders to those of the Adviser or any affiliated person or associated person of the Adviser.

Pursuant to the policy adopted by the Board of Directors, the Adviser has developed criteria that it uses to identify trading activity that may be excessive. The Adviser reviews on a regular, periodic basis available information related to the trading activity in the Fund in order to assess the likelihood that the Fund may be the target of excessive trading. As part of its excessive trading surveillance process, the Adviser, on a periodic basis, examines transactions that exceed certain monetary thresholds or numerical limits within a period of time. If, in its judgment, the Adviser detects excessive, short-term trading, it may reject or restrict a purchase request and may further seek to close an investor’s account with the Fund. The Adviser may modify its surveillance procedures and criteria from time to time without prior notice regarding the detection of excessive trading or to address specific circumstances. The Adviser will apply the criteria in a manner that, in its judgment, will be uniform.

If necessary, the Company may prohibit additional purchases of Fund shares by a financial intermediary or by certain customers of the financial intermediary. Financial intermediaries may also monitor their customers’ trading activities in the Fund. The criteria used by intermediaries to monitor for excessive trading may differ from the criteria used by the Company. If a financial intermediary fails to enforce the Company’s excessive trading policies, the Company may take certain actions, including terminating the relationship.

There is no assurance that the Fund will be able to identify market timers, particularly if they are investing through intermediaries.

Purchase of Fund Shares

Shares representing interests in the Fund are offered continuously for sale by Foreside Funds Distributors, LLC, formerly known as BNY Mellon Distributors Inc. (the “Distributor”). R Shares of the Fund have not commenced operations as of the date of this Prospectus.

General. You may purchase Shares of the Fund at the NAV per Share next calculated after your order is received by the Transfer Agent in good order as described below. The Fund’s NAV is calculated once daily at the close of regular trading hours on the NYSE (generally 4:00 p.m. Eastern time) on each day the NYSE is open. After an initial purchase is made, the Transfer Agent will set up an account for you on the Company records. The minimum initial investment in the Fund is $250,000. There is no minimum for subsequent investments. The Fund may accept initial investments of smaller amounts in its sole discretion. You can only purchase Shares of the Fund on days the NYSE is open and through the means described below.

Purchases Through Intermediaries. Shares of the Fund may also be available through certain brokerage firms, financial institutions and other industry professionals (collectively, “Service Organizations”). Certain features of the Shares, such as the initial and subsequent investment minimums and certain trading restrictions, may be modified or waived by Service Organizations. Service Organizations may impose transaction or administrative charges or other direct fees, which charges and fees would not be imposed if Shares are purchased directly from the Company. Therefore, you should contact the Service Organization acting on your behalf concerning the fees (if any) charged in connection with a purchase or redemption of Shares and should read this Prospectus in light of the terms governing your accounts with the Service Organization. Service Organizations will be responsible for promptly transmitting client or customer purchase and redemption orders to the Company in accordance with their agreements with the Company or its agent and with clients or customers. Service Organizations or, if applicable, their designees that have entered into agreements with the Company or its agent may enter confirmed purchase orders on behalf of clients and customers, with payment to follow no later than the Company’s pricing on the following Business Day. If payment is not received by such time, the Service Organization could be held liable for resulting fees or losses. The Company will be deemed to have received a purchase or redemption order when a Service Organization, or, if applicable, its authorized designee, accepts a purchase or redemption order in good order if the order is actually received by the Company in good order not later than the next business morning. If a purchase order is not received by the Fund in good order, BNY Mellon Investment Servicing (US) Inc. (the “Transfer Agent”) will contact the financial intermediary to determine the status of the purchase order. Orders received by the Company in good order will be priced at the Fund’s NAV next computed after they are deemed to have been received by the Service Organization or its authorized designee.

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For administration, subaccounting, transfer agency and/or other services, the Adviser may pay Service Organizations and certain recordkeeping organizations a fee (the “Service Fee”) of the average annual net asset value of accounts with the Company maintained by such Service Organization or recordkeepers. The Service Fee payable to any one Service Organization is determined based upon a number of factors, including the nature and quality of services provided, the operations processing requirements of the relationship and the standardized fee schedule of the Service Organization or recordkeeper.

Initial Investment By Mail. An account may be opened by completing and signing the application included with this Prospectus and mailing it to the Transfer Agent at the address noted below, together with a check ($250,000 minimum) payable to the Fund. Third party checks will not be accepted.

The name of the Fund should be designated on the application and should appear on the check. Payment for the purchase of Shares received by mail will be credited to a shareholder’s account at the NAV per share of the Fund next determined after receipt of payment in good order.

Initial Investment By Wire. Shares of the Fund may be purchased by wiring federal funds to The Bank of New York Mellon. A completed application must be forwarded to the Transfer Agent at the address noted above under “Initial Investment by Mail” in advance of the wire. For the Fund, notification must be given to the Transfer Agent at 1-866-882-1226 prior to 4:00 p.m., Eastern time, on the wire date. (Prior notification must also be received from investors with existing accounts.) Request account information and routing instructions by calling the Transfer Agent at 1-866-882-1226.

Federal funds wire purchases will be accepted only on days when the NYSE and The Bank of New York Mellon are open for business.

Additional Investments. Additional investments may be made at any time by purchasing Shares of the Fund at the NAV per Share of the Fund by mailing a check to the Transfer Agent at the address noted under “Initial Investment by Mail” (payable to S1 Fund) or by wiring monies to The Bank of New York Mellon as outlined under “Initial Investment by Wire.” Notification must be given to the Transfer Agent at 1-866-882-1226 prior to 4:00 p.m., Eastern time, on the wire date. Initial and additional purchases made by check cannot be redeemed until payment of the purchase has been collected. This may take up to 15 calendar days from the date of purchase.

Automatic Investment Plan. Additional investments in Shares of the Fund may be made automatically by authorizing the Transfer Agent to withdraw funds from your bank account through an Automatic Investment Plan ($250 minimum). Investors desiring to participate in an Automatic Investment Plan should call the Transfer Agent at 1-866-882-1226.

Retirement Plans/IRA Accounts. Shares may be purchased in conjunction with individual retirement accounts (“IRAs”) and rollover IRAs. A $15.00 custodial maintenance fee is charged per IRA account per year. For further information as to applications and annual fees, contact the Transfer Agent at 1-866-882-1226. To determine whether the benefits of an IRA are available and/or appropriate, you should consult with a tax advisor.

Purchases in Kind. In certain circumstances, Shares of the Fund may be purchased “in kind” (i.e. in exchange for securities, rather than cash). The securities rendered in connection with an in-kind purchase must be liquid securities that are not restricted as to transfer and have a value that is readily ascertainable in accordance with the Company’s valuation procedures. Securities accepted by the Fund will be valued, as set forth in this Prospectus, as of the time of the next determination of net asset value after such acceptance. The Shares of the Fund that are issued to the investor in exchange for the securities will be determined as of the same time. All dividend, subscription, or other rights that are reflected in the market price of accepted securities at the time of valuation become the property of the Fund and must be delivered to the Fund by the investor upon receipt from the issuer. The Fund will not accept securities in exchange for its Shares unless such securities are, at the time of the exchange,

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eligible to be held by the Fund and satisfy such other conditions as may be imposed by the Adviser or the Company. Purchases in-kind may result in the recognition of gain or loss for federal income tax purposes on the securities transferred to the Fund.

Other Purchase Information. The Company reserves the right, in its sole discretion, to suspend the offering of shares or to reject purchase orders when, in the judgment of management, such suspension or rejection is in the best interest of the Fund. The Adviser will monitor the Fund’s total assets and may, subject to Board approval, decide to close the Fund at any time to new investments or to new accounts due to concerns that a significant increase in the size of the Fund may adversely affect the implementation of the Fund’s strategy. The Adviser, subject to Board approval, may also choose to reopen the Fund to new investments at any time, and may subsequently close the Fund again should concerns regarding the Fund’s size recur. If the Fund closes to new investments, the Fund may be offered only to certain existing shareholders of the Fund and certain other persons who may be subject to cumulative, maximum purchase amounts, as follows:

a.  Persons who already hold Shares of the closed Fund directly or through accounts maintained by brokers by arrangement with the Company,

b.  Existing and future clients of financial advisers and planners whose clients already hold Shares of the closed Fund,

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c.  Employees of the Adviser and their spouses, parents and children, and

d.  Directors of the Company.

Distributions to all shareholders of the closed Fund will continue to be reinvested unless a shareholder elects otherwise. The Adviser, subject to the Board of Directors’ discretion, reserves the right to implement other purchase limitations at the time of closing, including limitations on current shareholders.

Purchases of the Fund’s Shares will be made in full and fractional shares of the Fund calculated to three decimal places.

The Company’s officers are authorized to waive the minimum initial and subsequent investment requirements.

Good Order. A purchase request is considered to be in good order when all necessary information is provided and all required documents are properly completed, signed and delivered. Purchase requests not in good order may be rejected.

Customer Identification Program. Federal law requires the Company to obtain, verify and record identifying information, which may include the name, residential or business street address, date of birth (for an individual), social security or taxpayer identification number or other identifying information for each investor who opens or reopens an account with the Company. Applications without the required information, or without any indication that a social security or taxpayer identification number has been applied for, may not be accepted. After acceptance, to the extent permitted by applicable law or its customer identification program, the Company reserves the right (a) to place limits on transactions in any account until the identity of the investor is verified; or (b) to refuse an investment in a Company portfolio or to involuntarily redeem an investor’s Shares and close an account in the event that an investor’s identity is not verified. The Company and its agents will not be responsible for any loss in an investor’s account resulting from the investor’s delay in providing all required identifying information or from closing an account and redeeming an investor’s Shares when an investor’s identity cannot be verified.

Redemption of Fund Shares

You may redeem Fund Shares at the next NAV calculated after a redemption request is received by the Transfer Agent in good order. The Fund’s NAV is calculated once daily at the close of regular trading hours on the NYSE (generally 4:00 p.m. Eastern time) on each day the NYSE is open. You can only redeem Shares of the Fund on days the NYSE is open and through the means described below. You may redeem Fund Shares by mail, or, if you are authorized, by telephone. The value of Shares redeemed may be more or less than the purchase price, depending on the market value of the investment securities held by the Fund.

Redemption By Mail. Your redemption requests should be addressed to S1 Fund, c/o BNY Mellon Investment Servicing (US) Inc., P.O. Box 9869, Providence, RI 02940; for overnight delivery, requests should be addressed to S1 Fund, c/o BNY Mellon Investment Servicing (US) Inc., 4400 Computer Drive, Westborough, MA 01581 and must include:

a.  Name of the Fund;

b.  Account number;

c.  Your Share certificates, if any, properly endorsed or with proper powers of attorney;

d.  A letter of instruction specifying the number of Shares or dollar amount to be redeemed, signed by all registered owners of the Shares in the exact names in which they are registered;

e.  Medallion signature guarantees are required when (i) the redemption proceeds are to be sent to someone other than the registered shareholder(s) or (ii) the redemption request is for $50,000 or more. A signature guarantee may be obtained from a domestic bank or trust company, broker, dealer, clearing agency or savings association who are participants in a Medallion Program recognized by the Securities Transfer Association. The three recognized Medallion Programs are Securities Transfer Agent Medallion Program (STAMP), Stock Exchanges Medallion Program (SEMP) and New York Stock Exchange, Inc. Medallion Program (MSP). Signature guarantees which are not a part of these programs will not be accepted. Please note that a notary public stamp or seal is not acceptable; and

f.  Other supporting legal documents, if required, in the case of estates, trusts, guardianships, custodianships, corporations, pension and profit sharing plans and other organizations.

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Redemption By Telephone. In order to utilize the telephone redemption option, you must indicate that option on your Account Application. Please note that the telephone redemption option is not available for retirement accounts. You may then initiate a redemption of Shares by calling the Transfer Agent at 1-866-882-1226 and requesting that the redemption proceeds be mailed to the primary registration address or wired per the authorized instructions. A wire charge of $7.50 is assessed and charged to the shareholder. If the telephone redemption option is authorized, the Transfer Agent may act on telephone instructions from any person representing himself or herself to be a shareholder and believed by the Transfer Agent to be genuine. The Transfer Agent’s records of such instructions are binding and shareholders, not the Fund or its Transfer Agent, bear the risk of loss in the event of unauthorized instructions reasonably believed by the Fund or its Transfer Agent to be genuine. The Fund and the Transfer Agent will employ reasonable procedures to confirm that instructions communicated are genuine and, if it does not, it may be liable for any losses due to unauthorized or fraudulent instructions. The procedures employed by the Fund and the Transfer Agent in connection with transactions initiated by telephone include tape recording of telephone instructions and requiring some form of personal identification prior to acting upon instructions received by telephone.

Involuntary Redemption. The Fund reserves the right to redeem a shareholder’s account in the Fund at any time the value of the account in the Fund falls below $5,000 as the result of a redemption or an exchange request. Shareholders will be notified in writing that the value of their account in the Fund is less than $5,000 and will be allowed 30 days to make additional investments before the redemption is processed. The transaction fee applicable to the Fund will not be charged when Shares are involuntarily redeemed.

The Fund may assert the right to redeem your shares at current NAV at any time and without prior notice if, and to the extent that, such redemption is necessary to reimburse the Fund for any loss sustained by reason of your failure to make full payment for shares of the Fund you previously purchased or subscribed for.

Other Redemption Information. Redemption proceeds for Shares of the Fund recently purchased by check may not be distributed until payment for the purchase has been collected, which may take up to fifteen days from the purchase date. Shareholders can avoid this delay by utilizing the wire purchase option.

Other than as described above, payment of the redemption proceeds will be made within seven days after receipt of an order for a redemption. The Company may suspend the right of redemption or postpone the date at times when the NYSE is closed or under any emergency circumstances as determined by the SEC.

If the Board of Directors determines that it would be detrimental to the best interests of the remaining shareholders of the Fund to make payment wholly or partly in cash, redemption proceeds may be paid in whole or in part by an in-kind distribution of readily marketable securities held by the Fund instead of cash in conformity with applicable rules of the SEC. If a shareholder receives redemption proceeds in-kind, the shareholder will bear the market risk of the securities received in the redemption until their disposition and should expect to incur transaction costs upon the disposition of the securities. The Company has elected, however, to be governed by Rule 18f-1 under the 1940 Act, so that the Fund is obligated to redeem its Shares solely in cash up to the lesser of $250,000 or 1% of its NAV during any 90-day period for any one shareholder of the Fund.

Good Order. A redemption request is considered to be in good order when all necessary information is provided and all required documents are properly completed, signed and delivered. Redemption requests not in good order may be delayed.

The Fund may pay additional distributions and dividends at other times if necessary for the Fund to avoid U.S. federal tax. The Fund’s distributions and dividends, whether received in cash or reinvested in additional Fund Shares, are subject to U.S. federal income tax.

More Information About Taxes

The following is a summary of certain United States tax considerations relevant under current law, which may be subject to change in the future. Except where otherwise indicated, the discussion relates to investors who are individual United States citizens or residents. You should consult your tax adviser for further information regarding federal, state, local and/or foreign tax consequences relevant to your specific situation.

Federal Taxes. The Fund contemplates distributing as dividends each year all or substantially all of its taxable income, including its net capital gain (the excess of net long-term capital gain over net short-term capital loss). Except as otherwise discussed below, you will be subject to federal income tax on Fund distributions regardless of whether they are paid in cash or reinvested in additional shares. Fund distributions attributable to short-term capital gains and net investment income will generally be taxable to you as ordinary income, except as discussed below.

Distributions attributable to the net capital gain of the Fund will be taxable to you as long-term capital gain, no matter how long you have owned your Fund shares. The maximum long-term capital gain rate applicable to individuals, estates, and trusts is currently 15%. You will be notified annually of the tax status of distributions to you.

Distributions of “qualifying dividends” will also generally be taxable to you at long-term capital gain rates as long as certain requirements are met. In general, if 95% or more of the gross income of the Fund (other than net capital gain) consists of dividends received from domestic corporations or “qualified” foreign corporations (“qualifying dividends”), then all distributions paid by the Fund to individual shareholders will be taxed at long-term capital gains rates. But if less than 95% of the gross income of the Fund (other than net capital gain) consists of qualifying dividends, then distributions paid by the Fund to individual shareholders will be qualifying dividends only to the extent they are derived from qualifying dividends earned by the Fund. For the lower rates to apply, you must have owned your Fund shares for at least 61 days during the 121-day period beginning on the date that is 60 days before the Fund’s ex-dividend date (and the Fund will need to have met a similar holding period requirement with respect to the shares of the corporation paying the qualifying dividend). The amount of the Fund’s distributions that qualify for this favorable treatment may be reduced as a result of the Fund’s securities lending activities (if any), a high portfolio turnover rate or investments in debt securities or “non-qualified” foreign corporations.

Distributions from the Fund will generally be taxable to you in the taxable year in which they are paid, with one exception. Distributions declared by the Fund in October, November or December and paid in January of the following year are taxed as though they were paid on December 31.

A portion of distributions paid by the Fund to shareholders that are corporations may also qualify for the dividends-received deduction for corporations, subject to certain holding period requirements and debt financing limitations.

If you purchase shares just before a distribution, the purchase price will reflect the amount of the upcoming distribution, but you will be taxed on the entire amount of the distribution received, even though, as an economic matter, the distribution simply constitutes a return of capital. This is known as “buying into a dividend.”

Sales and Exchanges. You will generally recognize taxable gain or loss for federal income tax purposes on a sale, exchange or redemption of your shares, including an exchange for shares of another Simple Alternatives Fund, based on the difference between your tax basis in the shares and the amount you receive for them. Generally, you will recognize long-term capital gain or loss if you have held your Fund shares for over twelve months at the time you dispose of them. (To aid in computing your tax basis, you should retain your account statements for the periods during which you held shares.)

Any loss realized on shares held for six months or less will be treated as a long-term capital loss to the extent of any capital gain dividends that were received on the shares. Additionally, any loss realized on a disposition of shares of the Fund may be disallowed under “wash sale” rules to the extent the shares disposed of are replaced with other shares of the Fund within a period of 61 days beginning 30 days before and ending 30 days after the shares are disposed of, such as pursuant to a dividend reinvestment in shares of the Fund. If disallowed, the loss will be reflected in an upward adjustment to the basis of the shares acquired.

IRAs and Other Tax-Qualified Plans. The one major exception to the preceding tax principles is that distributions on, and sales, exchanges and redemptions of, shares held in an IRA (or other tax-qualified plan) will not be currently taxable.

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Backup Withholding. The Fund may be required in certain cases to withhold and remit to the Internal Revenue Service a percentage of taxable dividends or gross proceeds realized upon sale payable to shareholders who have failed to provide a correct tax identification number in the manner required, or who are subject to withholding by the Internal Revenue Service for failure to properly include on their return payments of taxable interest or dividends, or who have failed to certify to the Fund that they are not subject to backup withholding when required to do so or that they are “exempt recipients.” The current withholding rate is 28%.

U.S. Tax Treatment of Foreign Shareholders. Generally, nonresident aliens, foreign corporations and other foreign investors are subject to a 30% withholding tax on dividends paid by a U.S. corporation, although the rate may be reduced for an investor that is a qualified resident of a foreign country with an applicable tax treaty with the United States. In the case of a regulated investment company such as the Fund, however, certain categories of dividends are exempt from the 30% withholding tax. These generally include dividends attributable to the Fund’s net capital gains (the excess of net long-term capital gains over net short-term capital loss) and, for taxable years of the Fund beginning before January 1, 2012, dividends attributable to the Fund’s interest income from U.S. obligors and dividends attributable to net short-term capital gains of the Fund.

In contrast, if a foreign investor conducts a trade or business in the United States and the investment in the Fund is effectively connected with that trade or business, or a foreign individual investor is present in the United States for 183 days or more in a calendar year, then the foreign investor’s income from the Fund will generally be subject to U.S. federal income tax at graduated rates in a manner similar to the income of a U.S. citizen or resident.

In addition, beginning January 1, 2014, the Fund will be required to withhold 30% tax on payments to foreign entities that do not meet specified information reporting requirements under the Foreign Account Tax Compliance Act.

Foreign shareholders will generally not be subject to U.S. tax on gains realized on sale, exchange or redemption of shares in the Fund.

All foreign investors should consult their own tax advisors regarding the tax consequences in their country of residence of an investment in the Fund.

State and Local Taxes. You may also be subject to state and local taxes on income and gain from Fund shares. State income taxes may not apply, however, to the portions of the Fund’s distributions, if any, that are attributable to interest on U.S. government securities. You should consult your tax adviser regarding the tax status of distributions in your state and locality.

Future Tax Treatment. Some of the tax provisions described above are subject to sunset provisions. Specifically, a sunset provision provides that the 15% long-term capital gain rate, the taxation of dividends at the long-term capital gain rate and the backup withholding rate will change after 2012.

More information about taxes is contained in the SAI.

Multi-Class Structure

The Fund also offers I Shares, which are offered directly to institutional investors without distribution fees in a separate prospectus. Shares of each class of the Fund represent equal pro rata interests in the Fund and accrue dividends and calculate NAV and performance quotations in the same manner. The performance of each class is quoted separately due to different actual expenses. The total return on R Shares of the Fund can be expected to differ from the total return on I Shares of the Fund. Information concerning other classes of the Fund can be requested by calling the Fund at 1-866-882-1226 .

NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR MAKE ANY REPRESENTATIONS NOT CONTAINED IN THIS PROSPECTUS OR IN THE FUND’S SAI INCORPORATED HEREIN BY REFERENCE, IN CONNECTION WITH THE OFFERING MADE BY THIS PROSPECTUS AND, IF GIVEN OR MADE, SUCH REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE COMPANY OR ITS DISTRIBUTOR. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFERING BY THE COMPANY OR BY THE DISTRIBUTOR IN ANY JURISDICTION IN WHICH SUCH OFFERING MAY NOT LAWFULLY BE MADE.

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S1 Fund

of
The RBB Fund, Inc.

(1-866-882-1226)
www.S1Fund.com

For More Information:

This Prospectus contains important information you should know before you invest. Read it carefully and keep it for future reference. More information about the S1 Fund is available free of charge, upon request, including:

Annual/Semi-Annual Reports

These reports contain additional information about the Fund’s investments, describe the Fund’s performance, list portfolio holdings, and discuss recent market conditions and economic trends. The annual report includes fund strategies that significantly affected the Fund’s performance during its last fiscal year.

When available, the annual and semi-annual reports to shareholders may be obtained by visiting www.S1Fund.com.