Purchases and Redemptions

Call your broker or (800) 888-9723.

Written Correspondence

Bedford Shares
c/o BNY Mellon Investment Servicing (US) Inc.
101 Sabin Street
Pawtucket, RI 02860-1427

Securities and Exchange Commission

You may view and copy information about the Company and the Portfolio, including the SAI, by visiting the SEC's Public Reference Room in Washington, D.C. or the EDGAR Database on the SEC's Internet site at www.sec.gov . You may also obtain copies of Portfolio documents by paying a duplicating fee and sending an electronic request to the following e-mail address: publicinfo@sec.gov , or by sending your written request and a duplicating fee to the SEC's Public Reference Section, Washington, D.C. 20549-1520. You may obtain information on the operation of the public reference room by calling the SEC at (202) 551-8090.

INVESTMENT COMPANY ACT FILE NO. 811-05518

SANSOM STREET SHARES OF THE
Money Market Portfolio

of

The RBB Fund, Inc.

Ticker: SANXX

This prospectus gives vital information about this money market mutual fund, advised by BlackRock Institutional Management Corporation ("BIMC" or the "Adviser"), including information on investment policies, risks and fees. For your own benefit and protection, please read it before you invest and keep it on hand for future reference.

Please note that the Money Market Portfolio:

n   is not a bank deposit;

n   is not federally insured;

n   is not an obligation of, or guaranteed or endorsed by PNC Bank, N.A., PFPC Trust Company or any other bank;

n   is not an obligation of, or guaranteed or endorsed or otherwise supported by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other governmental agency;

n   is not guaranteed to achieve its goals; and

n   may not be able to maintain a stable $1 share price and you may lose money.

THE SECURITIES DESCRIBED IN THIS PROSPECTUS HAVE BEEN REGISTERED WITH THE U.S. SECURITIES AND EXCHANGE COMMISSION ("SEC"). THE SEC, HOWEVER, HAS NOT JUDGED THESE SECURITIES FOR THEIR INVESTMENT MERIT AND HAS NOT DETERMINED THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANYONE WHO TELLS YOU OTHERWISE IS COMMITTING A CRIMINAL OFFENSE.

PROSPECTUS   December 31, 2010

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SUMMARY SECTION

Pricing Shares

BNY Mellon determines the Portfolio's NAV per share daily at 4:00 p.m., Eastern time, each day on which both the NYSE and the Federal Reserve Bank of Philadelphia (the "FRB") are open. These entities are generally open Monday through Friday, except national holidays. Currently, the only days on which the NYSE is open and the FRB is closed are Columbus Day and Veterans Day and the only day on which the NYSE is closed and the FRB is open is Good Friday. The Portfolio seeks to maintain a net asset value of $1.00 per share. The NAV is calculated by dividing the Portfolio's total assets, less its liabilities, by the number of shares outstanding. The Portfolio values its securities on the basis of the amortized cost method. This method values a Portfolio holding initially at its cost and then assumes a constant amortization to maturity of any discount or premium. The amortized cost method ignores any impact of changing interest rates.

During certain emergency closings of the NYSE, however, the Portfolio may open for business if it can maintain its operations. In this event, the Portfolio will determine its NAV as described above. To determine if the Portfolio is open for business on a day the NYSE is closed for an emergency, please contact us by calling the telephone number listed on the last page of this prospectus.

On any business day when the Securities Industry and Financial Markets Association ("SIFMA") recommends that the securities markets close early, the Portfolio reserves the right to close at or prior to the SIFMA recommended closing time. If the Portfolio does so, it will process purchase and redemption orders received after the Portfolio's closing time on the next business day. In 2011, the SIFMA recommends a 2:00 p.m. close on April 21, May 27, November 25, December 23 and December 30.

Market Timing

In accordance with the policy adopted by the Company's Board of Directors, the Company discourages and does not accommodate market timing and other excessive trading practices. Excessive short-term (market timing) trading practices may disrupt portfolio management strategies, increase brokerage and administrative costs, harm Portfolio performance and result in dilution in the value of Portfolio shares held by long-term shareholders. The Company and the Adviser reserve the right to (i) reject a purchase or exchange order, (ii) delay payment of immediate cash redemption proceeds for up to seven calendar days. (iii) revoke a shareholder's privilege to purchase Portfolio shares (including exchanges), or (iv) limit the amount of any exchange. An investor may receive notice that their purchase order or exchange has been rejected after the day the order is placed or after acceptance by a financial intermediary. 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 their 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 Portfolio. 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 Portfolio and its shareholders or would subordinate the interests of the Portfolio 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 Company's 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 Portfolio in order to assess the likelihood that the Portfolio 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, the Adviser may reject or restrict a purchase request and may further seek to close an investor's account with the Portfolio. The Adviser may modify its surveillance procedures and criteria from time to time

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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 the Adviser's judgment, will be uniform.

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

If necessary, the Company may prohibit additional purchases of Portfolio shares by a financial intermediary or by certain customers of the financial intermediary. Financial intermediaries may also monitor their customers' trading activities in the Portfolio. 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.

Purchase of Shares

General. Shares may be purchased through PNC Bank, N.A. or its affiliates ("PNC Bank") acting on behalf of its customers, including individuals, trusts, partnerships and corporations who maintain accounts (such as custody, trust or escrow accounts) with PNC Bank and who have authorized PNC Bank to invest in the Sansom Street Class on a customer's behalf. Shares may also be purchased through a broker-dealer that has entered into a dealer agreement with the Company's Distributor (a "Dealer"). The minimum initial investment is $1,500. There is no minimum subsequent investment. The Company in its sole discretion may accept or reject any order for purchases of Sansom Street Shares.

Purchases will be effected at the NAV next determined after BNY Mellon, the Company's transfer agent and administrative and accounting agent, has received a purchase order in good order and the Company's custodian has Federal Funds immediately available to it. In those cases where payment is made by check, Federal Funds will generally become available two business days after the check is received. A "business day" is any day that both the NYSE and the FRB are open. On any business day, orders which are accompanied by Federal Funds and received by the Company by 4:00 p.m. Eastern time, and orders as to which payment has been converted into Federal Funds by 4:00 p.m. Eastern time, will be executed as of 4:00 p.m. Eastern time on that business day. Orders which are accompanied by Federal Funds and received by the Company after the close of regular trading on the NYSE, and orders as to which payment has been converted to Federal Funds after the close of regular trading on the NYSE on a business day will be processed as of 4:00 p.m. Eastern time on the following business day. The Company's officers are authorized to waive the minimum initial and subsequent investment requirements.

Purchases through an Account with BNY Mellon or a Dealer. Sansom Street Shares may be purchased through your accounts at PNC Bank or a Dealer through procedures and requirements established by PNC Bank or a Dealer. Confirmations of Share purchases and redemptions will be sent to PNC Bank or the Dealer. Beneficial ownership of Sansom Street Shares will be recorded by PNC Bank or the Dealer and reflected in your account statements provided by them. If you wish to purchase Sansom Street Shares, contact PNC Bank or a Dealer.

PNC Bank may also impose minimum customer account requirements. Although PNC Bank does not impose a sales charge for purchases of Sansom Street Shares, depending upon the terms of your account, PNC Bank may charge account fees for automatic investment and other cash management services. Information concerning these minimum account requirements, services and any charges will be provided by PNC Bank before you authorize the initial purchase of Shares. This prospectus should be read in conjunction with any information you receive from PNC Bank.

Direct Purchases through a Dealer. You may also make an initial investment by mail by fully completing and signing an application obtained from a Dealer (an "Application") and mailing it, together with a check payable to The RBB Fund – Money Market Portfolio (Sansom Street Class), c/o BNY Mellon Investment Servicing (US) Inc., P.O. Box 9841, Providence, RI 02940; for overnight delivery mail to The RBB Fund – Money Market Portfolio (Sansom Street Class), c/o BNY Mellon Investment Servicing (US) Inc., 101 Sabin Street, Pawtucket, RI 02860-1427. An Application will be returned

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unless it contains the name of the Dealer from whom it was obtained. Subsequent purchases may be made through a Dealer or by forwarding payment to the Company's transfer agent at the address above.

Conflict of interest restrictions may apply to an institution's receipt of compensation paid by the Company in connection with the investment of fiduciary funds in Sansom Street Shares. Institutions, including banks regulated by the Comptroller of the Currency and investment advisers and other money managers subject to the jurisdiction of the SEC, the Department of Labor or state securities commissions, are urged to consult their legal advisers before investing fiduciary funds in Sansom Street Shares.

Good Order. A request to purchase Shares of the Portfolio is in good order if it includes the name of the Portfolio, the dollar amount of Shares to be purchased, and a completed Application (initial direct investment through a Dealer). Please see "Purchase of Shares" for instructions. 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.

Retirement Plans. Sansom Street Shares may be purchased in conjunction with individual retirement accounts ("IRAs") and rollover IRAs where PFPC Trust Company acts as custodian. A $15.00 retirement custodial maintenance fee is charged per IRA account per year. For further information as to applications and annual fees, contact the Distributor or your broker. To determine whether the benefits of an IRA are available and/or appropriate, you should consult with your tax advisor.

Redemption of Shares

General. Redemption orders are effected at the NAV per share next determined after receipt of the order in good order by the Company's transfer agent, BNY Mellon. The Portfolio generally calculates its NAV once daily at 4:00 p.m Eastern time on each day on which both the NYSE and the FRB are open. It is the responsibility of BNY Mellon and Dealers to transmit promptly to BNY Mellon your redemption request. If you hold share certificates, the certificates must accompany the redemption request. You may redeem all or some of your Shares in accordance with one of the procedures described below.

Redemption of Shares in an Account at PNC Bank. If you beneficially own Shares through an account at PNC Bank, you may redeem Sansom Street Shares in accordance with instructions and limitations pertaining to your account. If the redemption request is received by BNY Mellon by 4:00 p.m. Eastern time on any business day, the redemption will be effective as of 4:00 p.m. Eastern time on that day. Payment for redemption orders effected before 4:00 p.m. Eastern time will be wired the same day in Federal Funds to your account at PNC Bank, provided that the Company's custodian is open for business. If the custodian is not open, payment will be made on the next bank business day. No charge for wiring redemption payments is imposed by the Company, although PNC Bank may charge your account for redemption services.

Redemption of Shares in an Account for non-PNC Bank customers. If you beneficially own Shares through an account at a Dealer, you may redeem Shares in your account in accordance with instructions and limitations pertaining to the

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account by contacting the Dealer. If such notice is received by BNY Mellon from the broker before 4:00 p.m. Eastern time on any business day, the redemption will be effective as of 4:00 p.m. Eastern time on that day. Payment of the redemption proceeds will be made after 4:00 p.m. Eastern time on the day the redemption is effected, provided that the Company's custodian is open for business. If the custodian is not open, payment will be made on the next bank business day. If all Shares are redeemed, all accrued but unpaid dividends on those Shares will be paid with the redemption proceeds.

A Dealer may also redeem each day a sufficient number of your Shares to cover debit balances created by transactions in your account or instructions for cash disbursements. Shares will be redeemed on the same day that a transaction occurs that results in such a debit-balance or charge.

Each Dealer reserves the right to waive or modify criteria for participation in an account or to terminate participation in an account for any reason.

Redemption of Shares Owned Directly. If you own Shares directly, you may redeem any number of Shares by sending a written request to The RBB Fund – Money Market Portfolio (Sansom Street Class), c/o BNY Mellon Investment Servicing (US) Inc., P.O. Box 9841, Providence, RI 02940; for overnight delivery mail to The RBB Fund – Money Market Portfolio (Sansom Street Class), c/o BNY Mellon Investment Servicing (US) Inc., 101 Sabin Street, Pawtucket, RI 02860-1427. It is recommended that such request be sent by registered or certified mail if share certificates accompany the request. Redemption requests must be signed by each shareholder in the same manner as the Shares are registered. Redemption requests for joint accounts require the signature of each joint owner. On redemption requests of $5,000 or more, a signature guarantee is required. 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 signature guarantee program recognized by the Securities Transfer Association. A medallion imprint or medallion stamp indicates that the financial institution is a member of a medallion signature guarantee program and is an acceptable signature guarantor. The three recognized medallion programs are Securities Transfer Agents Medallion Program ("STAMP"), Stock Exchanges Medallion Program ("SEMP") and New York Stock Exchange, Inc. Medallion Signature Program ("MSP"). Signature guarantees that are not part of these programs will not be accepted.

If you are a direct investor, you may redeem Shares without charge by telephone if you have completed and returned an Application containing the appropriate telephone election. To add a telephone option to an existing account that previously did not provide for this option, you must submit a Telephone Authorization Form to BNY Mellon. This form is available from BNY Mellon. Once this election has been made, you may simply contact BNY Mellon by telephone to request a redemption by calling (800) 430-9618. Neither the Company, the Portfolio, the Distributor, BNY Mellon nor any other Company agent will be liable for any loss, liability, cost or expense for following the procedures described below or for following instructions communicated by telephone that they reasonably believe to be genuine.

The Company's telephone transaction procedures include the following measures: (1) requiring the appropriate telephone transaction privilege forms; (2) requiring the caller to provide the names of the account owners, the account social security number and the name of the Portfolio, all of which must match the Company's records; (3) requiring the Company's service representative to complete a telephone transaction form, listing all of the above caller identification information; (4) requiring that redemption proceeds be sent only by check to the account owners of record at the address of record, or by wire only to the owners of record at the bank account of record; (5) sending a written confirmation for each telephone transaction to the owners of record at the address of record within five business days of the call; and (6) maintaining tapes of telephone transactions for six months, if the Company elects to record shareholder telephone transactions. For accounts held of record by broker-dealers (other than the Distributor), financial institutions, securities dealers, financial planners or other industry professionals, additional documentation or information regarding the scope of a caller's authority is required. Finally, for telephone transactions in accounts held jointly, additional information regarding other account holders is required.

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Telephone transactions will not be permitted in connection with IRA or other retirement plan accounts or by an attorney-in-fact under power of attorney.

Proceeds of a telephone redemption request will be mailed by check to your registered address unless you have designated in the Application or telephone authorization form that such proceeds are to be sent by wire transfer to a specified checking or savings account. If proceeds are to be sent by wire transfer, a telephone redemption request received prior to the close of regular trading on the NYSE will result in redemption proceeds being wired to your bank account on the next bank business day. The minimum redemption for proceeds sent by wire transfer is $2,500. There is no maximum for proceeds sent by wire transfer. The Company may modify this redemption service at any time or charge a service fee upon prior notice to shareholders. A wire charge of $7.50 is assessed and charged to the shareholder.

Redemption by Check. If you are a direct investor or you do not have check writing privileges for your account, the Company will provide forms of drafts ("checks") payable through PNC Bank. These checks may be made payable to the order of anyone. The minimum amount of a check is $100; however, a Dealer may establish a higher minimum. If you wish to use this check writing redemption procedure, you should complete specimen signature cards (available from BNY Mellon), and forward them to BNY Mellon. BNY Mellon will then arrange for the checks to be honored by PNC Bank. If you own Shares through an account, you should contact your Dealer for signature cards. Investors with joint accounts may elect to have checks honored with a single signature. Check redemptions will be subject to PNC Bank's rules governing checks. You will be able to stop payment on a check redemption. The Company or PNC Bank may terminate this redemption service at any time, and neither shall incur any liability for honoring checks, for effecting redemptions to pay checks, or for returning checks which have not been accepted.

When a check is presented to PNC Bank for clearance, PNC Bank, as your agent, will cause the Company to redeem a sufficient number of your full and fractional Shares to cover the amount of the check. Pursuant to rules under the 1940 Act, checks may not be presented for cash payment at the offices of PNC Bank. This limitation does not affect checks used for the payment of bills or cash at other banks.

Additional Redemption Information. The Company ordinarily will make payment for all Shares redeemed within seven days after receipt by BNY Mellon of a redemption request in good order. Although the Company will redeem Shares purchased by check before the check clears, payment of redemption proceeds may be delayed for a period of up to fifteen days after their purchase, pending a determination that the check has cleared. This procedure does not apply to Shares purchased by wire payment. Investors should consider purchasing Shares using a certified or bank check or money order if they anticipate an immediate need for redemption proceeds. Redemption proceeds will ordinarily be paid within seven business days after a redemption request is received by the Transfer Agent in good order. The Portfolio may suspend the right of redemption or postpone the date at times when the NYSE or the bond market is closed or under any emergency circumstances as determined by the SEC.

The Company does not impose a charge when Shares are redeemed. The Company reserves the right to redeem any account in the Sansom Street Class involuntarily, on thirty days' notice, if that account falls below $500 as a result of redemptions, not market movement, and if during that thirty-day notice period the amount invested in the account is not increased to at least $500. Payment for Shares redeemed may be postponed or the right of redemption suspended as provided by the rules of the SEC.

If the Company's Board of Directors determines that it would be detrimental to the best interest of the remaining shareholders of the Portfolio 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 Portfolio instead of cash in conformity with applicable rules of the SEC. Investors generally will incur brokerage charges on the sale of investment securities so received in payment of redemptions. 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

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1940 Act, so that the Portfolio 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 Portfolio.

In the event of a determination by the Company's Board of Directors pursuant to Rule 22e-3 under the 1940 Act (i.e. that a deviation between the Portfolio's amortized cost price per share and its current NAV per share using available market quotations may result in a material dilution or other unfair results to shareholders), the Portfolio may suspend redemptions and postpone payment of redemption proceeds in order to facilitate an orderly liquidation of the Portfolio.

The Portfolio 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 Portfolio for any loss sustained by reason of your failure to make full payment for shares of the Portfolio you previously purchased or subscribed for.

Good Order. You must include complete and accurate required information on your redemption request. Please see "Redemption of Shares" for instructions. Redemption requests not in good order may be delayed.

Purchase and Redemption by Mail:

Purchase by Wire:

PNC Bank, N.A.
Philadelphia, Pennsylvania
ABA# 0310-0005-3
Account # 86-1282-3004
F/B/O Bogle Investment Management Small Cap Growth Fund
Ref. (Account Number)
Shareholder or Account Name

Redemption by Telephone:

Call the Transfer Agent at 1-877-264-5346

TAX INFORMATION

The Fund's distributions may be taxable as ordinary income or capital gains or a combination of the two, unless you are investing through a tax-advantaged arrangement, such as a 401(k) or IRA.

PAYMENTS TO BROKER-DEALERS AND OTHER FINANCIAL INTERMEDIARIES

If you purchase the Fund through a broker-dealer or other financial intermediary (such as a bank), the Fund and its related companies may pay the intermediary for the sale of Fund shares and related services. These payments may create a conflict of interest by influencing the broker-dealer or other intermediary and your salesperson to recommend the Fund over another investment. Ask your salesperson or visit your financial intermediary's website for more information.

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PRICING OF FUND SHARES

Shares of a class of the Fund are priced at their NAV. The NAV of a class of the Fund is calculated as follows:

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. The NYSE is generally open Monday through Friday, except national holidays. The Fund will effect purchases of Fund shares at the NAV next determined after receipt of your order or request in good order. The Fund will effect redemptions of Fund shares at the NAV next calculated after receipt of your order in good order.

The Fund's equity securities listed on any national or foreign exchange market system will be valued at the last sale price, except for the National Association of Securities Dealers Automatic Quotation System ("NASDAQ"). Equity securities listed on NASDAQ will be valued at the official closing price. Equity securities traded in the over-the-counter market are valued at their closing prices. If there were no transactions on that day, securities traded principally on an exchange or on NASDAQ will be valued at the mean of the last bid and ask prices prior to the market close. Fixed income securities having a remaining maturity of 60 days or less are valued at amortized cost, which approximates market value. Fixed income securities having a remaining maturity of greater than 60 days are valued using an independent pricing service. When prices are not available from such services or are deemed to be unreliable, securities may be valued by dealers who make markets in such securities.

If market quotations are unavailable or deemed unreliable by the Fund's administrator, in consultation with the Adviser, securities will be fair valued in accordance with procedures adopted by the Company's Board of Directors and under the Board of Directors' ultimate supervision. Relying on prices supplied by pricing services or dealers or using fair valuation involves the risk that the values used by the Fund to price its investments may be higher or lower than the values used by other investment companies and investors to price the same investments.

Investments in other open-end investment companies are valued based on the NAV of those investment companies (which may use fair value pricing as discussed in their prospectuses).

MARKET TIMING

In accordance with the policy adopted by the Company's Board of Directors, the Company discourages and does not accommodate market timing and other excessive trading practices. Purchases should be made with a view to longer-term investment only. Excessive short-term (market timing) trading practices may disrupt portfolio management strategies, increase brokerage and administrative costs, harm Fund performance and

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result in dilution in the value of Fund shares held by long-term shareholders. The Company and the Adviser reserve the right to (i) reject a purchase or exchange order, (ii) delay payment of immediate cash redemption proceeds for up to seven calendar days, (iii) revoke a shareholder's privilege to purchase Fund shares (including exchanges), or (iv) limit the amount of any exchange. An investor may receive notice that their purchase order or exchange has been rejected after the day the order is placed or after acceptance by a financial intermediary. 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 their 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 Company's 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, the Adviser 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 the Adviser's judgment, will be uniform.

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

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.

PURCHASE OF FUND SHARES

PURCHASE OF INSTITUTIONAL SHARES THROUGH AN INSTITUTIONAL ORGANIZATION

Institutional shares of the Fund may be sold to corporations or other institutions such as trusts, foundations or broker-dealers purchasing for the accounts of others ("Institutional Organizations"). If you purchase Institutional shares through an Institutional Organization, you may be charged a transaction-based fee or other fee for the services of such organization. Each Institutional Organization is responsible for transmitting to its customers a schedule of any such fees and information regarding any additional or different conditions regarding purchases. Customers of Institutional Organizations should read this Prospectus in light of the terms

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governing accounts with their Institutional Organization. The Fund does not pay compensation to or receive compensation from Institutional Organizations for the sale of Institutional shares.

Certain Institutional Organizations may have agreements with the Fund and may be responsible for promptly transmitting client or customer purchase and redemption orders to the Fund in accordance with such agreements. An Institutional Organization or, if applicable, its designee that has entered into such an agreement with the Fund or its agent may enter confirmed purchase orders on behalf of clients and customers, with payment to follow no later than the Fund's pricing on the following business day. If payment is not received by such time, the Institutional Organization could be held liable for resulting fees or losses. The Fund will be deemed to have received a purchase or redemption order when an Institutional Organization, or if applicable, its authorized designee, accepts a purchase or redemption order in good order. Orders received by the Fund in good order will be priced at the Fund's NAV next computed after they are accepted by the Institutional Organization or its authorized designee. If a purchase order is not received by the Fund in good order, BNY Mellon in its capacity as transfer agent (the "Transfer Agent") will contact the Institutional Organization to determine the status of the purchase order.

The Fund relies upon the integrity of the Institutional Organizations to ensure that orders are timely and properly submitted. The Fund cannot assure you that an Institutional Organization properly submitted to it all purchase and redemption orders received from the Institutional Organization's customers before the time for determination of the Fund's NAV in order to obtain that day's price.

PURCHASE OF INVESTOR SHARES THROUGH A SHAREHOLDER SERVICING AGENT

Purchase orders for Investor shares may be placed through a financial intermediary ("Shareholder Servicing Agent"). Investor shares are subject to such investment minimums and other terms and conditions as may be imposed by Shareholder Servicing Agents from time to time. Shareholder Servicing Agents may offer additional services to their customers. For further information as to how to direct a Shareholder Servicing Agent to purchase Investor shares of the Fund on your behalf, you should contact your Shareholder Servicing Agent or the Fund's Distributor.

Certain Shareholder Servicing Agents may have agreements with the Fund and may be responsible for promptly transmitting client or customer purchase and redemption orders to the Fund in accordance with such agreements. A Shareholder Servicing Agent or, if applicable, its designee that has entered into such an agreement with the Fund or its agent may enter confirmed purchase orders on behalf of clients and customers, with payment to follow no later than the Fund's pricing on the following business day. If payment is not received by such time, the Shareholder Servicing Agent could be held liable for resulting fees or losses. The Fund will be deemed to have received a purchase or redemption order when the Shareholder Servicing Agent, or if applicable, its authorized designee, accepts a purchase or redemption order in good order. Orders received by the Fund in good order will be priced at the Fund's NAV next computed after they are accepted by the Shareholder Servicing Agent or its authorized designee. If a purchase order is not received by the Fund in good order, the Transfer Agent will contact the Shareholder Servicing Agent to determine the status of the purchase order.

The Fund relies upon the integrity of the Shareholder Servicing Agent to ensure that orders are timely and properly submitted. The Fund cannot assure you that a Shareholder Servicing Agent properly submitted to it all purchase and redemption orders received from the Shareholder Servicing Agent's customers before the time for determination of the Fund's NAV in order to obtain that day's price.

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SHAREHOLDER SERVICING PLAN

The Fund has adopted a Shareholder Servicing Plan that allows Investor shares of the Fund to pay service fees to Shareholder Servicing Agents, including the Adviser. Under the Shareholder Servicing Plan, if a Shareholder Servicing Agent provides shareholder services, including responding to shareholder inquiries and assisting shareholders with their accounts, the Fund may pay shareholder service fees to the Shareholder Servicing Agent at an annual rate not to exceed 0.25% of the average daily net asset value of the Investor shares beneficially owned by the Shareholder Servicing Agent's clients.

PURCHASE OF INSTITUTIONAL AND INVESTOR SHARES THROUGH THE FUND'S TRANSFER AGENT

You may also purchase Institutional and Investor shares directly from the Fund at the NAV per share next calculated after your order 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. After an initial purchase is made, the Transfer Agent will set up an account for you on the Fund's records, which will show all of your transactions and the balance of the shares you own. You can only purchase shares on days the NYSE is open and through the means described below. The Fund's officers are authorized to waive the minimum initial and subsequent investment requirements.

Initial Investment By Mail. Subject to acceptance by the Fund, an account may be opened by completing and signing an Account Application and mailing it to the Fund at the address noted below, together with a check ($1,000,000 minimum for Institutional shares and $10,000 minimum for Investor shares ($2,000 minimum for IRA accounts accepted for Investor shares)) payable to Bogle Investment Management Small Cap Growth Fund:

Bogle Investment Management Small Cap Growth Fund
c/o BNY Mellon Investment Servicing (US) Inc.
P.O. Box 9809
Providence, RI 02940

or overnight to:
Bogle Investment Management Small Cap Growth Fund
c/o BNY Mellon Investment Servicing (US) Inc.
101 Sabin Street
Pawtucket, RI 02860-1427

Subject to acceptance by the Fund, 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. Such payment need not be converted into federal funds (monies credited to the Fund's custodian bank by a Federal Reserve Bank) before acceptance by the Fund. No third party endorsed checks (including checks issued by credit card companies) or foreign checks will be accepted as payment for shares.

Initial Investment By Wire. Subject to acceptance by the Fund, shares may be purchased by wiring federal funds ($1,000,000 minimum for Institutional shares and $10,000 minimum for Investor shares ($2,000 minimum for IRA accounts accepted for Investor shares)) to PNC Bank, N.A. (see instructions below). A completed Account Application should be forwarded to the Fund at the address noted above under "Initial Investment By Mail" in advance of the wire. Notification must be given to the Fund at 1-877-264-5346 prior to 4:00 p.m.,

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Eastern time, on the business day prior to the wire date. (Prior notification must also be received from investors with existing accounts.) Funds should be wired to:

PNC Bank, N.A.
Philadelphia, Pennsylvania
ABA# 0310-0005-3
Account # 86-1282-3004
F/B/O Bogle Investment Management Small Cap Growth Fund
Ref. (Account Number)
Shareholder or Account Name

Federal funds wire purchases will be accepted only on days when the Fund and PNC Bank, N.A. are open for business.

Additional Investments. Additional investments may be made at any time ($5,000 minimum for Institutional shares and $250 minimum for Investor shares ($100 minimum for IRA accounts accepted for Investor shares)) by purchasing shares at the NAV per share of the Fund by mailing a check to the Fund at the address noted under "Initial Investment By Mail" (payable to Bogle Investment Management Small Cap Growth Fund) or by wiring monies to the custodian bank as outlined above under "Initial Investment By Wire." Notification must be given to the Fund at 1-877-264-5346 prior to 4:00 p.m., Eastern time, on the business day prior to the wire date. Initial and additional purchases made by check cannot be redeemed until payment of the purchase has been collected, which may take up to fifteen calendar days from the purchase date.

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 the Automatic Investment Plan. Investors who would like to participate in the Automatic Investment Plan should call the Transfer Agent at 1-877-264-5346, or complete the appropriate section of the account application. The minimum initial investment for the Automatic Investment Plan is $10,000 for Investor shares and $1,000,000 for Institutional shares. Minimum monthly payments are $100 for Investor shares and $1,000 for Institutional shares, and minimum quarterly payments are $300 and $3,000 respectively.

Retirement Plans/IRA Accounts. A $15.00 retirement custodial maintenance fee is charged per Investor Class IRA account per year. The Adviser may reimburse a portion of this fee, thereby reducing the charge to the retirement investor. For further information as to applications and annual fees, contact the Transfer Agent at 1-877-264-5346. To determine whether the benefits of an IRA are available and/or appropriate, you should consult with a tax adviser.

OTHER PURCHASE INFORMATION

The Company reserves the right, in its sole discretion, to suspend the offering of Institutional and Investor shares or to reject purchase orders when, in the judgment of management, such suspension or rejection is in the best interests of the Fund. The Adviser will monitor the Fund's total assets and, subject to Board approval, may 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

14

investments, the Fund would 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 Fund directly or through accounts maintained by brokers by arrangement with the Adviser,

b.  existing and future clients of the Adviser and of Financial Advisers and Planners whose clients already hold shares of the Fund,

c.  employees of the Adviser and their families, and

d.  directors of the Company.

Distributions to all shareholders of the Fund will continue to be reinvested unless a shareholder elects otherwise. The Adviser, subject to Board approval, 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. In the interest of economy and convenience, certificates for shares will not be issued except at the written request of the shareholder. Certificates for fractional shares, however, will not be issued.

Shares may be purchased and subsequent investments may be made by principals and employees of the Adviser, and by their family members, either directly or through their IRAs and by any pension and profit-sharing plan of the Adviser, without being subject to the minimum investment limitation. The Company's officers are authorized to waive the minimum initial and subsequent investment requirements.

Good Order. You must include complete and accurate required information on your purchase request. Please see "Purchase of Fund Shares" for instructions. 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 Institutional and Investor shares of the Fund 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

15

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 Institutional and Investor shares of the Fund by mail, or, if you are authorized, by telephone (excluding retirement accounts where PFPC Trust Company acts as custodian). 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 Bogle Investment Management Small Cap Growth Fund, c/o BNY Mellon Investment Servicing (US) Inc., P.O. Box 9809, Providence, RI 02940, or for overnight delivery to Bogle Investment Management Small Cap Growth Fund, c/o BNY Mellon Investment Servicing (US) Inc., 101 Sabin Street, Pawtucket, RI 02860-1427 and must include:

•  the share certificates, if issued;

•  a letter of instruction, if required, or a stock assignment 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;

•  any required Medallion signature guarantees, which are required when (i) the redemption proceeds are to be sent to someone other than the registered shareholder(s), (ii) the redemption request is for $50,000 or more, or (iii) a share transfer request is made. A Medallion signature guarantee is a special signature guarantee that may be obtained from a domestic bank or trust company, broker-dealer, clearing agency or savings association which is a participant in a Medallion signature guarantee program recognized by the Securities Transfer Association. A Medallion imprint or Medallion stamp indicates that the financial institution is a member of a Medallion signature guarantee program and is an acceptable signature guarantor. The three recognized signature guarantee 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

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

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 Fund at 1-877-264-5346 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. Shares cannot be redeemed by telephone if share certificates are held for those shares. If the Telephone Redemption Option is authorized, the Fund and its Transfer Agent may act on telephone instructions from any person representing himself or herself to be a shareholder and believed by the Fund or its 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.

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Involuntary Redemption. The Fund reserves the right to redeem a shareholder's account in the Fund (other than those in an IRA account) at any time the value of the account falls below $500. Shareholders will be notified in writing that the value of their account is below $500 and will be allowed 30 days to make additional investments before the involuntary redemption is processed.

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.

INVESTOR CLASS

If you purchased Investor shares through a Shareholder Servicing Agent, you must place all redemption orders for Investor shares through that Shareholder Servicing Agent in accordance with instructions or limitations pertaining to your account with your Shareholder Servicing Agent. Redemption orders for Investor shares are effected at the NAV next determined after the order is received by the Fund's Transfer Agent. While no redemption fee is imposed by the Fund, Shareholder Servicing Agents may charge your account for redemption services. You should contact your Shareholder Servicing Agent or the Fund's Transfer Agent for further information regarding redemption of Investor shares, including the availability of wire or telephone redemption privileges, or whether you may elect to participate in a systematic withdrawal plan.

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. Redemption proceeds will ordinarily be paid within seven business days after a redemption request is received by the Transfer Agent in good order. The Fund may suspend the right of redemption or postpone the date at times when the NYSE or the bond market is closed or under any emergency circumstances as determined by the SEC.

If the Company's 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, the Fund may pay the redemption proceeds in whole or in part by a distribution in-kind of readily marketable securities held by the Fund in lieu of cash in conformity with applicable rules of the SEC. Investors generally will incur brokerage charges on the sale of portfolio securities so received in the payment of redemptions. 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 Investment Company Act of 1940, as amended, 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. You must include complete and accurate required information on your redemption request. Please see "Redemption of Fund Shares" for instructions. Redemption requests not in good order may be delayed.

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PURCHASES AND REDEMPTIONS

Call your registered representative or 1-877-264-5346.

SECURITIES AND EXCHANGE COMMISSION

You may view and copy information about the Company and the Fund, including the SAI, by visiting the SEC's Public Reference Room in Washington, D.C. or the EDGAR Database on the SEC's Internet site at www.sec.gov. You may also obtain copies of Fund documents by paying a duplicating fee and sending an electronic request to the following e-mail address: publicinfo@sec.gov , or by sending your request and a duplicating fee to the SEC's Public Reference Section, Washington, D.C. 20549-1520. You may obtain information on the operation of the Public Reference Room by calling the SEC at (202) 551-8090.

INVESTMENT COMPANY ACT FILE NO. 811-05518

SENBANC FUND

i

SENBANC FUND

SHAREHOLDER INFORMATION   Pricing of Fund Shares

Shares of the Fund are sold at their net asset value ("NAV") plus a front-end sales charge, if applicable. This is commonly referred to as the "public offering price." The NAV of the Fund is calculated as follows:

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. The NYSE is generally open Monday through Friday, except national holidays. The Fund will effect purchases of Fund shares at the public offering price next determined after receipt of your order or request in good order. The Fund will effect redemptions of Fund shares at the NAV next calculated after receipt of your order in good order.

The Fund's equity securities listed on any national or foreign exchange market system will be valued at the last sale price, except for the National Association of Securities Dealers Automatic Quotation System ("NASDAQ"). Equity securities listed on NASDAQ will be valued at the official closing price. Equity securities traded in the over-the-counter market are valued at their closing prices. If there were no transactions on that day, securities traded principally on an exchange or on NASDAQ will be valued at the mean of the last bid and ask prices prior to the market close. Fixed income securities having a remaining maturity of 60 days or less are valued at amortized cost, which approximates market value. Fixed income securities having a remaining maturity of greater than 60 days are valued using an independent pricing service. When prices are not available from such services or are deemed to be unreliable, securities may be valued by dealers who make markets in such securities.

If market quotations are unavailable or deemed unreliable by the Fund's administrator, in consultation with the Adviser, securities will be fair valued in accordance with procedures adopted by the Company's Board of Directors and under the Board of Directors ultimate supervision. Relying on prices supplied by pricing services or dealers or using fair valuation involves the risk that the values used by the Fund to price its investments may be higher or lower than the values used by other investment companies and investors to price the same investments.

Investments in other open-end investment companies are valued based on the NAV of those investment companies (which may use fair value pricing as discussed in their prospectuses).

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No sales charge is payable at the time of purchase on investments of $1 million or more; however, a 1% contingent deferred sales charge is imposed in the event of redemption within 12 months following any such purchase. See the section entitled "Contingent Deferred Sales Charge on Certain Redemptions." The Underwriter may pay a commission at the rate of 1% to certain brokerage firms, financial institutions and other industry professionals, including Hilliard Lyons investment brokers (collectively "Service Organizations"), who initiate and are responsible for purchases of $1 million or more.

Combined Purchase Privilege. Certain purchases of Fund shares made at the same time by you, your spouse and your children under age 25 may be combined for purposes of determining the "Amount of Purchase." The combined purchase privilege may also apply to certain employee benefit plans and trust estates. The following purchases may be combined for purposes of determining the "Amount of Purchase:" (a) individual purchases, if made at the same time, by a single purchaser, the purchaser's spouse and children under the age of 25 purchasing shares for their own accounts, including shares purchased by a qualified retirement plan(s) exclusively for the benefit of such individual(s) (such as an IRA, individual-type section 403(b) plan or single-participant Keogh-type plan) or by a "Company," as defined in Section 2(a)(8) of the Investment Company Act of 1940, as amended (the "1940 Act"), solely controlled, as defined in the 1940 Act, by such individual(s), or (b) individual purchases by trustees or other fiduciaries purchasing shares (i) for a single trust estate or a single fiduciary account, including an employee benefit plan, or (ii) concurrently by two or more employee benefit plans of a single employer or of employers affiliated with each other in accordance with Section 2(a)(3)(c) of

15

SENBANC FUND

the 1940 Act (excluding in either case an employee benefit plan described in (a) above), provided such trustees or other fiduciaries purchase shares in a single payment. Purchases made for nominee or street name accounts may not be combined with purchases made for such other accounts. You may also further discuss the combined purchase privilege with your investment broker or other Service Organization. In order to take advantage of the combined purchase privilege, the purchases combined must be brought to the attention of your investment broker or other Service Organization at the time of your purchase.

Cumulative Quantity Discount. You may combine the value of shares held in the Fund, along with the dollar amount of shares being purchased, to qualify for a cumulative quantity discount. The value of shares held is the higher of their cost or current net asset value. For example, if you hold shares having a value of $475,000 and purchase $25,000 of additional shares, the sales charge applicable to the additional investment would be 1.75%, the rate applicable to a single purchase of $500,000. In order to receive the cumulative quantity discount, the value of shares held must be brought to the attention of your investment broker or other Service Organization at the time of your purchase.

Letter of Intent. If you anticipate purchasing at least $500,000 of shares within a 13-month period, the shares may be purchased at a reduced sales charge by completing and returning a Letter of Intent (the "Letter"), which can be provided to you by your investment broker or other Service Organization. The reduced sales charge may also be obtained on shares purchased within the 90 days prior to the date of receipt of the Letter. Shares purchased under the Letter are eligible for the same reduced sales charge that would have been available had all the shares been purchased at the same time. There is no obligation to purchase the full amount of shares indicated in the Letter. Should you invest more or less than indicated in the Letter during the 13-month period, the sales charge will be recalculated based on the actual amount purchased. A portion of the amount of the intended purchase normally will be held in escrow in the form of Fund shares pending completion of the intended purchase.

Sales Charge Waivers. The Fund sells shares at net asset value without imposition of a sales charge to the following persons:

•  current and retired (as determined by Hilliard Lyons) employees of Hilliard Lyons and its affiliates, their spouses and children under the age of 25 and employee benefit plans for such employees, provided orders for such purchases are placed by the employee;

•  any other investment company in connection with the combination of such company with the Fund by merger, acquisition of assets or otherwise;

16

SENBANC FUND

•  Directors of the Company and registered representatives of Service Organizations;

•  existing advisory clients of the Adviser on purchases effected by transferring all or a portion of their investment management or trust account to the Fund, provided that such account had been maintained for a period of six months prior to the date of purchase of Fund shares;

•  trust companies, bank trust departments and registered investment advisers purchasing for accounts over which they exercise investment authority and which are held in a fiduciary, agency, advisory, custodial or similar capacity, provided that the amount collectively invested or to be invested in the Fund by such entity or adviser during the subsequent 13-month period totals at least $100,000;

•  employer-sponsored retirement plans with assets of at least $100,000 or 25 or more eligible participants; and

•  accounts established under a fee-based program sponsored and maintained by a registered broker-dealer or other financial intermediary and approved by the Distributor.

In order to take advantage of a sales charge waiver, a purchaser must certify to the Service Organization eligibility for a waiver and must notify the Service Organization whenever eligibility for a waiver ceases to exist. A Service Organization reserves the right to request additional information from a purchaser in order to verify that such purchaser is so eligible. Such information may include account statements or other records regarding shares of the Fund held by you or your immediate family household members.

Information regarding sales charges, discounts and waivers is available free of charge at www.hilliard.com.

Contingent Deferred Sales Charge on Certain Redemptions. Purchases of $1 million or more are not subject to an initial sales charge; however, a contingent deferred sales charge is payable on these investments in the event of a share redemption within 12 months following the share purchase, at the rate of 1% of the lesser of the value of the shares redeemed (exclusive of reinvested dividends and capital gain distributions) or the total cost of such shares. In determining whether a contingent deferred sales charge is payable, and the amount of the charge, it is assumed that shares purchased with reinvested dividends and capital gain distributions and then other shares held the longest are the first redeemed. The contingent deferred sales charge is further discussed in the SAI.

17

SENBANC FUND

Market Timing

In accordance with the policy adopted by the Company's Board of Directors, the Company discourages and does not accommodate market timing and other excessive trading practices. Purchases should be made with a view to longer-term investment only.

Excessive short-term (market timing) trading practices may disrupt portfolio management strategies, increase brokerage and administrative costs, harm Fund performance and result in dilution in the value of Fund shares held by long-term shareholders. The Company and the Adviser reserve the right to (i) reject a purchase or exchange order, (ii) delay payment of immediate cash redemption proceeds for up to seven calendar days, (iii) revoke a shareholder's privilege to purchase Fund shares (including exchanges), or (iv) limit the amount of any exchange. An investor may receive notice that their purchase order or exchange has been rejected after the day the order is placed or after acceptance by a financial intermediary.. 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 their 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, the Adviser 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 the Adviser's judgment, will be uniform.

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

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SENBANC FUND

If necessary, the Company may prohibit additional purchases of Portfolio shares by a financial intermediary or by certain customers of the financial intermediary. Financial intermediaries may also monitor their customers' trading activities in the Portfolio. 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.

Purchase of Fund Shares

Shares representing interests in the Fund are offered continuously for sale by BNY Mellon Distributors Inc. (the "Underwriter"). The Board of Directors of the Company has approved and adopted a Plan of Distribution for the Fund (the "Plan") pursuant to Rule 12b-1 under the 1940 Act. Under the Plan, the Underwriter is reimbursed from the Fund for distribution expenses actually incurred, up to 0.60% on an annualized basis of the average daily net assets of the Fund. Because these fees are paid out of the Fund's assets on an ongoing basis, over time these fees will increase the cost of your investment and may cost you more than paying other types of sales charges.

Amounts reimbursed to the Underwriter under the Plan may be for expenses in connection with the sale of shares of the Fund, including ongoing servicing and/or maintenance of the accounts of shareholders. The Underwriter may delegate some or all of these functions to Service Organizations (which may include Hilliard Lyons). See "Purchases Through Intermediaries" below.

General. Initial investments in the Fund must be at least $250, and subsequent minimum investments must be at least $100. For purposes of meeting the minimum initial purchase, clients which are part of endowments, foundations or other related groups may be aggregated. The Fund's officers are authorized to waive the minimum initial and subsequent investment requirements. After an initial purchase is made, BNY Mellon, the Fund's transfer agent (the "Transfer Agent"), will set up an account for you in the Company records.

Purchases Through Intermediaries. Shares of the Fund are available through Service Organizations, including Hilliard Lyons. Service Organizations may impose transaction or administrative charges or other direct fees, which would not be imposed if shares of the Fund were purchased directly from the Company. Therefore, investors should contact the Service Organization acting on their behalf concerning the fees, if any, charged in connection with a purchase or redemption of shares of the Fund and should read this Prospectus in light of the terms governing their 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

19

SENBANC FUND

agreements with the Company and with clients and customers. A Service Organization or, if applicable, its designee that has entered into such an agreement 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 Fund'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. Orders received by the Fund in good order will be executed at the Fund's public offering price next determined after they are accepted by the Service Organization or its authorized designee. If a purchase order is not received by the Company in good order, the Transfer Agent will contact the Service Organization to determine the status of the purchase order.

The Company relies upon the integrity of Service Organizations to ensure that orders are timely and properly submitted. The Fund cannot assure you that Service Organizations have properly submitted to it all purchase and redemption orders received from the Service Organizations' customers before the time for determination of the Fund's public offering price in order to obtain that day's price.

Automatic Investment Plan. The automatic investment plan enables you to make regular monthly or quarterly investments in shares through automatic charges to your bank account. With your authorization and bank approval, your bank account is automatically charged by your Service Organization for the amount specified ($100 minimum), which is automatically invested in shares at the public offering price on or about the date you specify. Bank accounts are charged on the day or a few days before investments are credited, depending on the bank's capabilities, and you will receive a confirmation statement showing the current transaction. To participate in the automatic investment plan, contact your Service Organization for an authorization agreement, which contains details about the automatic investment plan. If your bank account cannot be charged due to insufficient funds, a stop payment order or the closing of your account, the automatic investment plan may be terminated and the related investment reversed. You may change the amount of the investment or discontinue the automatic investment plan at any time by notifying your Service Organization.

Retirement Plans. Shares of the Fund may be purchased in connection with various retirement plans, including Individual Retirement Accounts ("IRAs"), section 403(b) plans and retirement plans for self-employed individuals, partnerships and corporations and their employees. Detailed information

20

SENBANC FUND

concerning retirement plans is available from your Service Organization. A $15.00 retirement custodial maintenance fee is charged per IRA account per year. For further information as to applications and annual fees, contact your Service Organization. To determine whether the benefits of an IRA are available and/or appropriate, you should consult with a tax advisor.

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, including the Directors of the Company, who may be subject to cumulative, maximum purchase amounts.

If the Fund closes to new investments, distributions to all shareholders of the Fund will continue to be reinvested unless a shareholder elects otherwise. The Adviser, subject to Board approval, reserves the right to implement specific 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. You must include complete and accurate required information on your purchase request. 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;

21

SENBANC FUND

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 submit redemption requests to your Service Organization in person or by telephone, mail or wire. Redemption requests are effective at the NAV next calculated, less any applicable contingent deferred sales charge, after receipt of the redemption request by your Service Organization in good order and transmission of the request to the Transfer Agent. You can only redeem shares of the Fund on days the NYSE is open. 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. Your Service Organization may refuse a telephone redemption request if it believes it is advisable to do so. You will bear the risk of loss from fraudulent or unauthorized instructions received over the telephone provided your Service Organization reasonably believes that the instructions are genuine.

Telephone Redemptions. During periods of dramatic economic or market changes, you may experience difficulty in implementing a telephone redemption with your Service Organization because of increased telephone volume.

Systematic Withdrawal Plan. If your account has a value of at least $10,000, you may establish a Systematic Withdrawal Plan and receive regular periodic payments. A request to establish a Systematic Withdrawal Plan must be submitted in writing to Senbanc Fund, 500 West Jefferson Street, Louisville, Kentucky 40202. Each withdrawal redemption will be processed on or about the 25th of the month and mailed as soon as possible thereafter. There are no service charges for maintenance; the minimum amount that you may withdraw each period is $100. (This is merely the minimum amount allowed and should not be mistaken for a recommended amount.) The holder of a Systematic Withdrawal Plan will have any income dividends and any capital gains distributions reinvested in full and fractional shares at NAV. To provide funds for payment, shares will be redeemed in such amount as is necessary at the redemption price. The systematic withdrawal of shares may reduce or possibly exhaust the shares in your account, particularly in the event of a market decline. As with other redemptions, a systematic withdrawal payment is a sale for federal income tax purposes. Payments made pursuant to a Systematic Withdrawal Plan may not be income since part of such payments could be a return of capital.

22

SENBANC FUND

You will ordinarily not be allowed to make additional investments of less than the aggregate approval withdrawals under the Systematic Withdrawal Plan during the time you have the Plan in effect. While the Systematic Withdrawal then is in effect you may not make periodic investments under the Automatic Investment Plan. You will receive a confirmation of each transaction showing the sources of the payment and the share and cash balance remaining in your account. The Systematic Withdrawal Plan may be terminated on written notice by the shareholder or by the Fund and will terminate automatically if all shares are liquidated or withdrawn from the account or upon the death or incapacity of the shareholder. You may change the amount and schedule of withdrawal payments or suspend such payments by giving written notice to the Transfer Agent at least ten business days prior to the end of the month preceding a scheduled payment.

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.

Redemption proceeds will ordinarily be paid within seven business days after a redemption request is received by the Transfer Agent in proper form. The Fund may suspend the right of redemption or postpone the date at times when the NYSE or the bond market is closed or under any emergency circumstances as determined by the Securities and Exchange Commission ("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. Investors generally will incur brokerage charges on the sale of portfolio securities so received in payment of redemptions. 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, as amended, 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. You must include complete and accurate required information on your redemption request. Redemption requests not in good order may be delayed.

23

SENBANC FUND

Involuntary Redemption. The Fund reserves the right to redeem your account at any time the value of the account falls below $500 as the result of a redemption.

You will be notified in writing that the value of your account is less than $500 and will be allowed 30 days to make additional investments before the redemption is processed.

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.

Purchases and Redemptions

Call (800) 444-1854.

Written Correspondence

Senbanc Fund
500 West Jefferson Street
Louisville, Kentucky 40202

Securities and Exchange Commission

You may view and copy information about the Company and the Fund, including the SAI, by visiting the SEC's Public Reference Room in Washington, D.C. or the EDGAR Database on the SEC's Internet site at www.sec.gov. You may also obtain copies of Fund documents by paying a duplicating fee and sending an electronic request to the following e-mail address: publicinfo@sec.gov, or by sending your written request and a duplicating fee to the SEC's Public Reference Section, Washington, D.C. 20549-1520. You may obtain information on the operation of the public reference room by calling the SEC at (202) 551-8090,

Investment Company Act File No.: 811-05518

TICKER: SENBX

PROSPECTUS
DECEMBER 31, 2010

THE SECURITIES DESCRIBED IN THIS PROSPECTUS HAVE BEEN REGISTERED WITH THE SECURITIES AND EXCHANGE COMMISSION (THE"SEC"). THE SEC, HOWEVER, HAS NOT JUDGED THESE SECURITIES FOR THEIR INVESTMENT MERIT AND HAS NOT DETERMINED THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANYONE WHO TELLS YOU OTHER WISE IS COMMITTING A CRIMINAL OFFENSE.

Marvin & Palmer
Large Cap
Growth Fund

of The RBB Fund, Inc.

TICKER: MPAUX

Prospectus

December 31, 2010

The securities described in this Prospectus have been registered with the Securities and Exchange Commission ("SEC"). The SEC, however, has not judged these securities for their investment merit and has not determined the accuracy or adequacy of this Prospectus. Anyone who tells you otherwise is committing a criminal offense.

TABLE OF CONTENTS

SUMMARY SECTION