[1]

Management Fees include advisory fees paid to both Abbey Capital Limited (the “Adviser”) and one or more trading advisers (the “Trading Advisers”). There are no performance fees charged by the Adviser or Trading Advisers either at the Fund or at the Fund’s wholly-owned Subsidiaries.

[2]

The Adviser has contractually agreed to waive its advisory fee and/or reimburse expenses in order to limit Total Annual Fund Operating Expenses (excluding certain items discussed below) to 1.79%, 2.04%, 2.79% and 2.04% of the Fund’s average daily net assets attributable to Class I Shares, Class A Shares, Class C Shares and Class T Shares, respectively. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total Annual Fund Operating Expenses to exceed 1.79%, 2.04%, 2.79% or 2.04%, as applicable: acquired fund fees and expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation is in effect until December 31, 2026 for Class I Shares, Class A Shares, Class C Shares and Class T Shares, and may not be terminated prior to that date without the approval of the Board of Directors of The RBB Fund, Inc. (the “Company”). If at any time the Fund’s Total Annual Fund Operating Expenses (not including acquired fund fees and expenses, brokerage commissions, extraordinary items, interest or taxes) for a year are less than 1.79%, 2.04%, 2.79% and 2.04%, as applicable, the Adviser may recoup any waived or reimbursed amounts from the Fund within three years from the date on which such waiver or reimbursement was made by the Adviser, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[3]

“Other Expenses” for Class T Shares, which had not commenced operations as of the date of this Prospectus, are estimated for the current fiscal year.

[4]

Management Fees include advisory fees paid to both Abbey Capital Limited (the “Adviser”) and one or more trading advisers (the “Trading Advisers”). There are no performance fees charged by the Adviser or Trading Advisers either at the Fund or at the Fund’s wholly-owned Subsidiaries.

[5]

Acquired Fund Fees and Expenses (“AFFE”) are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. AFFE are estimated for the current fiscal year.

[6]

Total Annual Fund Operating Expenses and Total Annual Fund Operating Expenses after Fee Waivers and/or Expense Reimbursements shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as AFFE. Without AFFE, the Total Annual Fund Operating Expenses after Fee Waivers and/or Expense Reimbursements would be 1.79%, 2.04% and 2.79% of the Fund’s average daily net assets attributable to Class I Shares, Class A Shares and Class C Shares, respectively.

[7]

The Adviser has contractually agreed to waive its advisory fee and/or reimburse expenses in order to limit Total Annual Fund Operating Expenses (excluding certain items discussed below) to 1.79%, 2.04% and 2.79% of the Fund’s average daily net assets attributable to Class I Shares, Class A Shares and Class C Shares, respectively. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total Annual Fund Operating Expenses to exceed 1.79%, 2.04% or 2.79%, as applicable: acquired fund fees and expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation is in effect until December 31, 2026 for Class I Shares, Class A Shares and Class C Shares, and may not be terminated prior to that date without the approval of the Board of Directors of The RBB Fund, Inc. (the “Company”). If at any time the Fund’s Total Annual Fund Operating Expenses (not including acquired fund fees and expenses, brokerage commissions, extraordinary items, interest or taxes) for a year are less than 1.79%, 2.04% and 2.79%, as applicable, the Adviser may recoup any waived or reimbursed amounts from the Fund within three years from the date on which such waiver or reimbursement was made by the Adviser, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[8]

The Fund is currently only available to clients of the Fund’s investment adviser, Altair Advisers LLC (the “Adviser”) and to other investors at the Fund’s discretion. Investors in the Fund who are also clients of the Adviser will incur additional fees based on the total assets of the client under management with the Adviser. The Adviser does not receive a separate management fee from the Fund, although the Adviser is reimbursed for out-of-pocket expenses in connection with its compliance monitoring of Fund trading, up to 0.01% of the Fund’s average daily net assets. The management fee shown above reflects the aggregate fees paid by the Fund to the Sub-Advisers for the fiscal year ended August 31, 2025, plus reimbursements to the Adviser for out-of-pocket expenses. Investors in the Fund who are also clients of the Adviser should review the information provided separately by the Adviser for a discussion of fees and expenses charged by the Adviser.

[9]

The Fund is currently only available to clients of the Fund’s investment adviser, Altair Advisers LLC (the “Adviser”) and to other investors at the Fund’s discretion. Investors in the Fund who are also clients of the Adviser will incur additional fees based on the total assets of the client under management with the Adviser. The Adviser does not receive a separate management fee from the Fund, although the Adviser is reimbursed for compliance expenses in connection with managing the Fund, up to 0.03% of the Fund’s average daily net assets. The management fee shown above reflects the aggregate fees paid by the Fund to the Sub-Advisers for the fiscal year ended August 31, 2025, plus reimbursements to the Adviser for out-of-pocket expenses. Investors in the Fund who are also clients of the Adviser should review the information provided separately by the Adviser for a discussion of fees and expenses charged by the Adviser.

[10]

The Fund’s investment adviser, Boston Partners Global Investors, Inc. (the “Adviser”), has contractually agreed to waive all or a portion of its advisory fee and/or reimburse expenses in an aggregate amount equal to the amount by which the Total annual Fund operating expenses (excluding certain items discussed below) exceeds 0.80% or 1.05% of the average daily net assets attributable to the Fund’s Institutional Class shares or Investor Class shares of the Fund, respectively. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total annual Fund operating expenses to exceed 0.80% or 1.05% of the average daily net assets attributable to the Fund’s Institutional Class shares or Investor Class shares of the Fund, respectively: short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation is in effect until December 31, 2026, and may not be terminated without the approval of the Board of Directors of The RBB Fund, Inc. If at any time the Total annual fund operating expenses (not including short sale dividend expense, brokerage commissions, extraordinary items, interest or taxes) for a year for Institutional Class or Investor Class shares are less than 0.80% or 1.05%, respectively, or the expense cap then in effect, whichever is less, the Adviser is entitled to reimbursement by the Fund of the advisory fees forgone and other payments remitted by the Adviser to the Fund within three years from the date on which such waiver or reimbursement was made, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[11]

The Fund’s investment adviser, Boston Partners Global Investors, Inc. (the “Adviser”) has contractually agreed to waive all or a portion of its advisory fee and/or reimburse expenses in an aggregate amount equal to the amount by which the Total annual Fund operating expenses (excluding certain items discussed below) for the Fund’s Institutional Class shares exceeds 0.95% of the average daily net assets attributable to the Fund’s Institutional Class shares. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total annual Fund operating expenses to exceed 0.95%: short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation is in effect until December 31, 2026, and may not be terminated without the approval of the Board of Directors of The RBB Fund, Inc. If at any time the Fund’s Total annual Fund operating expenses (not including short sale dividend expense, brokerage commissions, extraordinary items, interest or taxes) for a year are less than 0.95% or the expense cap then in effect, or whichever is less, the Adviser is entitled to reimbursement by the Fund of the advisory fees waived and other payments remitted by the Adviser to the Fund within three years from the date on which such waiver or reimbursement was made, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[12]

The Fund’s investment adviser, Boston Partners Global Investors, Inc. (the “Adviser”) has contractually agreed to waive all or a portion of its advisory fee and/or reimburse expenses in an aggregate amount equal to the amount by which the Total annual Fund operating expenses (excluding certain items discussed below) for the Fund’s Institutional Class shares exceeds 0.90% of the average daily net assets attributable to the Fund’s Institutional Class shares. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total annual Fund operating expenses to exceed 0.90%: short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation is in effect until December 31, 2026, and may not be terminated without the approval of the Board of Directors of The RBB Fund, Inc. (the “Board”). If at any time the Fund’s Total annual Fund operating expenses (not including short sale dividend expense, brokerage commissions, extraordinary items, interest or taxes) for a year are less than 0.90% or the expense cap then in effect, or whichever is less, the Adviser is entitled to reimbursement by the Fund of the advisory fees waived and other payments remitted by the Adviser to the Fund within three years from the date on which such waiver or reimbursement was made, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[13]

The Fund’s investment adviser, Boston Partners Global Investors, Inc. (the “Adviser”), has contractually agreed to waive all or a portion of its advisory fee and/or reimburse expenses in an aggregate amount equal to the amount by which the Total annual Fund operating expenses (excluding certain items discussed below) exceeds 1.96% or 2.21% of the average daily net assets attributable to the Fund’s Institutional Class shares or Investor Class shares of the Fund, respectively. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total annual Fund operating expenses to exceed 1.96% or 2.21% of the average daily net assets attributable to the Fund’s Institutional Class shares or Investor Class shares of the Fund, respectively: short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation is in effect until December 31, 2026, and may not be terminated without the approval of the Board of Directors of The RBB Fund, Inc. If at any time the Total annual fund operating expenses (not including short sale dividend expense, brokerage commissions, extraordinary items, interest or taxes) for a year for Institutional Class or Investor Class shares are less than 1.96% or 2.21%, respectively, or the expense cap then in effect, whichever is less, the Adviser is entitled to reimbursement by the Fund of the advisory fees forgone and other payments remitted by the Adviser to the Fund within three years from the date on which such waiver or reimbursement was made, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[14]

The Fund’s investment adviser, Boston Partners Global Investors, Inc. (the “Adviser”), has contractually agreed to waive all or a portion of its advisory fee and/or reimburse expenses in an aggregate amount equal to the amount by which the Total annual Fund operating expenses (excluding certain items discussed below) exceeds 1.50% or 1.75% of the average daily net assets attributable to the Fund’s Institutional Class shares or Investor Class shares of the Fund, respectively. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total annual Fund operating expenses to exceed 1.50% or 1.75% of the average daily net assets attributable to the Fund’s Institutional Class shares or Investor Class shares of the Fund, respectively: short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation is in effect until December 31, 2026, and may not be terminated without the approval of the Board of Directors of The RBB Fund, Inc. If at any time the Total annual fund operating expenses (not including short sale dividend expense, brokerage commissions, extraordinary items, interest or taxes) for a year for Institutional Class or Investor Class shares are less than 1.50% or 1.75%, respectively, or the expense cap then in effect, whichever is less, the Adviser is entitled to reimbursement by the Fund of the advisory fees forgone and other payments remitted by the Adviser to the Fund within three years from the date on which such waiver or reimbursement was made, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[15]

Acquired Fund Fees and Expenses (“AFFE”) are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses and Total Annual Fund Operating Expenses after Fee Waiver/Expense Reimbursements shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as AFFE.

[16]

The Fund’s investment adviser, Boston Partners Global Investors, Inc. (the “Adviser”) has contractually agreed to waive all or a portion of its advisory fee and/or reimburse expenses in an aggregate amount equal to the amount by which the Total annual Fund operating expenses (excluding certain items discussed below) for the Fund’s Institutional Class shares exceeds 1.10% of the average daily net assets attributable to the Fund’s Institutional Class shares. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total annual Fund operating expenses to exceed 1.10%: short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation is in effect until December 31, 2026, and may not be terminated without the approval of the Board of Directors of The RBB Fund, Inc. If at any time, the Fund’s total annual fund operating expenses (not including short sale dividend expense, brokerage commissions, extraordinary items, interest or taxes) for a year are less than 1.10% or the expense cap then in effect, whichever is less, the Adviser is entitled to reimbursement by the Fund of the advisory fees forgone and other payments remitted by the Adviser to the Fund within three years from the date on which such waiver or reimbursement was made, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[17]

The Fund’s investment adviser, Boston Partners Global Investors, Inc. (the “Adviser”) has contractually agreed to waive all or a portion of its advisory fee and/or reimburse expenses in an aggregate amount equal to the amount by which the Total annual Fund operating expenses (excluding certain items discussed below) for the Fund’s Institutional Class shares exceeds 1.10% of the average daily net assets attributable to the Fund’s Institutional Class shares. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total annual Fund operating expenses to exceed 1.10%: short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation is in effect until December 31, 2026, and may not be terminated without the approval of the Board of Directors of The RBB Fund, Inc. If at any time, the Fund’s total annual fund operating expenses (not including short sale dividend expense, brokerage commissions, extraordinary items, interest or taxes) for a year are less than 1.10% or the expense cap then in effect, whichever is less, the Adviser is entitled to reimbursement by the Fund of the advisory fees forgone and other payments remitted by the Adviser to the Fund within three years from the date on which such waiver or reimbursement was made, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[18]

The Fund has adopted a distribution plan for Class A Shares and Class C Shares pursuant to Rule 12b-1 (“Rule 12b-1 Plan”) under the Investment Company Act of 1940, as amended (the “1940 Act”) that permits payments of up to 0.25% as a percentage of average daily net assets of the Fund’s Class A Shares and payments of up to 1.00% as a percentage of average daily net assets of the Fund’s Class C Shares.

[19]

“Other Expenses” includes Acquired Fund Fees and Expenses (“AFFE), which are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as AFFE.

[20]

Campbell & Company Investment Adviser LLC (“Campbell” or the “Adviser”) has contractually agreed to waive its advisory fee and/or reimburse expenses in order to limit Total Annual Fund Operating Expenses (excluding certain items discussed below) to 2.00%, 1.75%, and 2.75% of the Fund’s average daily net assets for Class A Shares, Class I Shares, and Class C Shares, respectively. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total Annual Fund Operating Expenses to exceed 2.00%, 1.75%, and 2.75%, as applicable: acquired fund fees and expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation is in effect until December 31, 2026 and may not be terminated without the approval of the Board of Directors of The RBB Fund, Inc. If at any time the Fund’s Total Annual Fund Operating Expenses (not including acquired fund fees and expenses, brokerage commissions, extraordinary items, interest or taxes) for a year are less than 2.00%, 1.75%, and 2.75%, as applicable, the Adviser may recoup from the Fund any waived amount or other payments remitted by the Adviser within three years from the date on which such waiver or reimbursement was made, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement and the expense limitations that are current in effect.

[21]

The Fund’s investment adviser, F/m Investments LLC (the “Adviser”), has contractually agreed to waive all or a portion of its advisory fee and/or reimburse expenses in an aggregate amount equal to the amount by which the Total Annual Fund Operating Expenses (excluding certain items discussed below) for the Fund’s Shares exceeds 0.54% of the average daily net assets attributable to the Fund’s Shares. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total Annual Fund Operating Expenses to exceed 0.54%: acquired fund fees and expenses, short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation is in effect until December 31, 2026 and may not be terminated without the approval of the Board of Directors of The RBB Fund, Inc. If at any time the Fund’s Total Annual Fund Operating Expenses (not including acquired fund fees and expenses, short sale dividend expense, brokerage commissions, extraordinary items, interest or taxes) for a year are less than 0.54% or the expense cap then in effect, whichever is less, the Adviser may recoup any waived or reimbursed amounts from the Fund within three years from the date on which such waiver or reimbursement was made by the Adviser, provided such reimbursement does not cause the Fund to exceed (i) expense limitations that were in effect at the time of the waiver or reimbursement, or (ii) the current expense limitations.

[22]

Acquired Fund Fees and Expenses are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as Acquired Fund Fees and Expenses.

[23]

Acquired Fund Fees and Expenses are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as Acquired Fund Fees and Expenses.

[24]

Acquired Fund Fees and Expenses are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as Acquired Fund Fees and Expenses.

[25]

Acquired Fund Fees and Expenses are indirect fees and expenses that the Portfolio incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Portfolio Operating Expenses shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Portfolio and does not include indirect expenses such as Acquired Fund Fees and Expenses.

[26]

Acquired Fund Fees and Expenses are indirect fees and expenses that the Portfolio incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Portfolio Operating Expenses shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Portfolio and does not include indirect expenses such as Acquired Fund Fees and Expenses.

[27]

Acquired Fund Fees and Expenses are indirect fees and expenses that the Portfolio incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Portfolio and does not include indirect expenses such as Acquired Fund Fees and Expenses.

[28]

Under the terms of the expense limitation agreement entered into by The RBB Fund, Inc. (the “Company”) and F/m Investments LLC (the “Adviser”), contractually agreed to reduce Management Fees and to absorb Other Expenses to the extent necessary to limit Total Annual Fund Operating Expenses (excluding brokerage costs, taxes, borrowing costs, interest, acquired fund fees and expenses and extraordinary expenses’) to an amount not exceeding 0.60% and 0.85% of the Fund’s average daily net assets attributable to the Institutional Class Shares and Retail Class Shares, respectively, to December 31, 2026. Management fee reductions and Other Expenses absorbed by the Adviser are subject to repayment by the Fund for a period of 3 years following the date such fees and expenses were waived or reimbursed, provided that the repayments do not cause Total Annual Fund Operating Expenses (excluding brokerage costs, taxes, borrowing costs, interest, acquired fund fees and expenses and extraordinary expenses’) to exceed either: (i) the expense limitation in effect at the time such fees and expenses were waived or absorbed; or (ii) any expense limitation in effect at the time the Adviser seeks reimbursement of such fees and expenses. This agreement may be terminated by either party upon 60 days’ prior written notice, provided, however, the Adviser may not terminate this agreement without the approval of the Board of Directors of the Company and this agreement will terminate automatically if the Adviser ceases to serve as investment adviser to the Fund.

[29]

The Fund has adopted a distribution plan for Investor Class Shares pursuant to Rule 12b-1 (“Rule 12b-1 Plan”) under the Investment Company Act of 1940, as amended (the “1940 Act”) that permits payments of up to 0.25% as a percentage of average daily net assets of the Fund’s Investor Class Shares.

[30]

“Acquired Fund Fees and Expenses” (“AFFE”) are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses and Total Annual Fund Operating Expenses after Fee Waivers and/or Expense Reimbursements shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as AFFE.

[31]

Optima Asset Management LLC (the “Adviser”) has contractually agreed to waive its advisory fee and/or reimburse expenses in order to limit Total Annual Fund Operating Expenses (excluding certain items discussed below) to 1.25% and 1.50% of the Fund’s average daily net assets attributable to Founders Class Shares and Investor Class Shares, respectively. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and could cause net Total Annual Fund Operating Expenses to exceed 1.25% and 1.50%, as applicable: acquired fund fees and expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation is in effect until December 31, 2026, for Founders Class Shares and Investor Class Shares and may not be terminated without the approval of the Board of Directors (the “Board”) of The RBB Fund, Inc (the “Company”). If at any time the Fund’s Total Annual Fund Operating Expenses (not including acquired fund fees and expenses, brokerage commissions, extraordinary items, interest or taxes) for a year are less than 1.25% or 1.50%, as applicable, the Adviser may recoup from the Fund any waived amount or other payments remitted by the Adviser within three years from the date on which such waiver or reimbursement was made, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[32]

“Other Expenses” and “Dividend and Interest Expenses” for Investor Class Shares, which had not commenced operations as of the date of this Prospectus, are estimated for the current fiscal year.

[33]

Summit Global Investments, LLC (the “Adviser”), the Fund’s investment adviser, has contractually agreed to waive management fees and reimburse expenses through December 31, 2026 to the extent that Total Annual Fund Operating Expenses (excluding certain items discussed below) exceed 0.98%, 1.23% and 1.98% of the Fund’s average daily net assets attributable to Class I Shares, Class A and Class C Shares, respectively. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and are expected to cause net Total Annual Fund Operating Expenses to exceed 0.98%, 1.23% or 1.98%, as applicable: acquired fund fees and expenses, short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation may not be terminated before December 31, 2026 without the approval of the Board of Directors of the Company. If at any time the Fund’s Total Annual Fund Operating Expenses (not including acquired fund fees and expenses, short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes) for a year are less than 0.98%, 1.23% and 1.98% of the Fund’s average daily net assets attributable to Class I Shares, Class A Shares and Class C Shares, respectively, the Adviser is entitled to reimbursement by the Fund of the advisory fees forgone and other payments remitted by the Adviser to the Fund within three years from the date on which such waiver or reimbursement was made, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[34]

“Other Expenses” for Class A Shares and Class C Shares, which had not commenced operations as of the date of this Prospectus, are estimated based on Class I Shares for the current fiscal year.

[35]

Summit Global Investments, LLC (the “Adviser”), the Fund’s investment adviser, has contractually agreed to waive management fees and reimburse expenses through December 31, 2026, to the extent that Total Annual Fund Operating Expenses (excluding certain items discussed below) exceed 0.84%, 1.09%, and 1.84% of the Fund’s average daily net assets attributable to Class I Shares, Class A Shares and Class C Shares, respectively. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and are expected to cause net Total Annual Fund Operating Expenses to exceed 0.84%,1.09% or 1.84%, as applicable: acquired fund fees and expenses, short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation may not be terminated before

[36]

Summit Global Investments, LLC (the “Adviser”), the Fund’s investment adviser, has contractually agreed to waive management fees and reimburse expenses through December 31, 2026, to the extent that Total Annual Fund Operating Expenses (excluding certain items discussed below) exceed 1.23% of the Fund’s average daily net assets attributable to Class I Shares. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account and are expected to cause net Total Annual Fund Operating Expenses to exceed 1.23%: Acquired Fund Fees and Expenses (“AFFE”), short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation may not be terminated before December 31, 2026, without the approval of the Board of Directors of the Company. If at any time the Fund’s Total Annual Fund Operating Expenses (not including AFFE, short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes) for a year are less than 1.23% of the Fund’s average daily net assets attributable to Class I Shares, the Adviser is entitled to reimbursement by the Fund of the advisory fees forgone and other payments remitted by the Adviser to the Fund within three years from the date on which such waiver or reimbursement was made, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[37]

“Other Expenses” are estimated for the current fiscal year.

[38]

Acquired Fund Fees and Expenses are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as Acquired Fund Fees and Expenses.

[39]

Summit Global Investments, LLC (the “Adviser”), the Fund’s investment adviser, has contractually agreed to waive management fees and reimburse expenses through December 31, 2026 to the extent that Total Annual Fund Operating Expenses (excluding certain items discussed below) exceed 1.95% of the average daily net assets attributable to the Fund’s Class I Shares. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account: fund services administrative fee, short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation may not be terminated before December 31, 2026 without the approval of the Board of Directors of the Company. If at any time the Fund’s Total Annual Fund Operating Expenses (not including fund services administrative fee, short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes) for a year are less than 1.95% of the average daily net assets attributable to the Fund’s Class I Shares, the Adviser is entitled to reimbursement by the Fund of the advisory fees forgone and other payments remitted by the Adviser to the Fund within three years from the date on which such waiver or reimbursement was made, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[40]

Acquired Fund Fees and Expenses are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as Acquired Fund Fees and Expenses. Acquired Fund Fees and Expenses have been restated for the current fiscal year.

[41]

Summit Global Investments, LLC (the “Adviser”), the Fund’s investment adviser, has contractually agreed to waive management fees and reimburse expenses through December 31, 2026 to the extent that Total Annual Fund Operating Expenses (excluding certain items discussed below) exceed 1.95% of the average daily net assets attributable to the Fund’s Class I Shares. In determining the Adviser’s obligation to waive advisory fees and/or reimburse expenses, the following expenses are not taken into account: fund services administrative fee, short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes. This contractual limitation may not be terminated before December 31, 2026 without the approval of the Board of Directors of the Company. If at any time the Fund’s Total Annual Fund Operating Expenses (not including fund services administrative fee, short sale dividend expenses, brokerage commissions, extraordinary items, interest or taxes) for a year are less than 1.95% of the average daily net assets attributable to the Fund’s Class I Shares, the Adviser is entitled to reimbursement by the Fund of the advisory fees forgone and other payments remitted by the Adviser to the Fund within three years from the date on which such waiver or reimbursement was made, provided such reimbursement does not cause the Fund to exceed expense limitations that were in effect at the time of the waiver or reimbursement.

[42]

Acquired Fund Fees and Expenses are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as Acquired Fund Fees and Expenses.

[43]

Acquired Fund Fees and Expenses are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as Acquired Fund Fees and Expenses.

[44]

Acquired Fund Fees and Expenses are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as Acquired Fund Fees and Expenses.

[45]

“Other Expenses” are estimated for the current fiscal year.

[46]

“Other Expenses” have been estimated to reflect expenses to be incurred during the current fiscal year.

[47]

“Other Expenses” have been estimated to reflect expenses to be incurred during the current fiscal year.

[48]

“Other Expenses” have been estimated to reflect expenses to be incurred during the current fiscal year.

[49]

“Other Expenses” have been estimated to reflect expenses to be incurred during the current fiscal year.

[50]

“Other Expenses” have been estimated to reflect expenses to be incurred during the current fiscal year.

[51]

“Other Expenses” have been estimated to reflect expenses to be incurred during the current fiscal year.

[52]

“Other Expenses” have been estimated to reflect expenses to be incurred during the current fiscal year.

[53]

“Acquired Fund Fees and Expenses” (“AFFE”) are indirect fees and expenses that the Fund incurs from investing in the shares of other investment companies. Total Annual Fund Operating Expenses do not correlate to the expense ratio in the Fund’s Financial Highlights because the Financial Highlights include only the direct operating expenses incurred by the Fund, and exclude AFFE.

[54]

F/m Investments LLC (the “Adviser”) has contractually agreed to waive and/or reimburse certain fees and expenses so that the total annual fund operating expenses (excluding AFFE, brokerage commissions, extraordinary items, interest or taxes) is limited to 0.25% of the Fund’s average daily net assets. This contractual limitation is in effect until December 31, 2026, and may not be terminated prior to that date without the approval of the Board of Directors of The RBB Fund, Inc.

[55]

“Acquired Fund Fees and Expenses” (“AFFE”) are indirect fees and expenses that the Fund incurs from investing in the shares of other investment companies. AFFE is estimated for the current fiscal year.

[56]

“Acquired Fund Fees and Expenses” (“AFFE”) are indirect fees and expenses that the Fund incurs from investing in the shares of other investment companies. Total Annual Fund Operating Expenses do not correlate to the expense ratio in the Fund’s Financial Highlights because the Financial Highlights include only the direct operating expenses incurred by the Fund, and exclude AFFE.

[57]

F/m Investments LLC (the “Adviser”) has contractually agreed to waive and/or reimburse certain fees and expenses so that the total annual fund operating expenses (excluding AFFE, brokerage commissions, extraordinary items, interest or taxes) is limited to 0.25% of the Fund’s average daily net assets. This contractual limitation is in effect until December 31, 2026, and may not be terminated prior to that date without the approval of the Board of Directors of The RBB Fund, Inc.

[58]

“Other Expenses” have been estimated to reflect expenses to be incurred during the current fiscal year.

[59]

“Other Expenses” have been estimated to reflect expenses to be incurred during the current fiscal year.

[60]

“Other Expenses” have been estimated to reflect expenses to be incurred during the current fiscal year.

[61]

“Other Expenses” have been estimated to reflect expenses to be incurred during the current fiscal year.

[62]

“Other Expenses” have been estimated to reflect expenses to be incurred during the current fiscal year.

[63]

Prior to September 15, 2025, the unitary management fee was 0.25%.

[64]

“Other Expenses” have been estimated to reflect expenses to be incurred during the current fiscal year.

[65]

Acquired Fund Fees and Expenses (“AFFE”) are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as AFFE.

[66]

Acquired Fund Fees and Expenses (“AFFE”) are indirect fees and expenses that the Fund incurs from investing in the shares of other mutual funds, including money market funds and exchange traded funds. Please note that the amount of Total Annual Fund Operating Expenses and Total Annual Fund Operating Expenses after Fee Waiver/Expense Reimbursements shown in the above table will differ from the “Financial Highlights” section of the Prospectus, which reflects the operating expenses of the Fund and does not include indirect expenses such as AFFE.

[67]

F/m Investments LLC (the “Adviser”) has contractually agreed to reduce its investment advisory fee and to absorb Fund expenses (a “Waiver/Reimbursement”) to the extent necessary to limit total annual operating expenses (excluding interest, taxes, AFFE, distribution and/or service fees, brokerage commissions, dividend expenses on short sales, and other expenditures which are capitalized in accordance with generally accepted accounting principles and other extraordinary expenses not incurred in the ordinary course of the Fund’s business) to an amount not exceeding a percentage of average daily net assets of 1.15% for Investor Class shares and 0.90% for Institutional Class shares through December 31, 2026. Any such Waiver/Reimbursement is subject to repayment by the Fund for a period of 3 years following the date of the Waiver/Reimbursement but only if such recoupment can be achieved without exceeding the expense limitation in place at the time of the Waiver/Reimbursement.