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Label Element Value
Prospectus [Line Items] rr_ProspectusLineItems  
Document Type dei_DocumentType 497
Document Period End Date dei_DocumentPeriodEndDate Aug. 31, 2024
Entity Registrant Name dei_EntityRegistrantName THE RBB FUND, INC.
Entity Central Index Key dei_EntityCentralIndexKey 0000831114
Entity Inv Company Type dei_EntityInvCompanyType N-1A
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate May 20, 2025
Document Effective Date dei_DocumentEffectiveDate May 20, 2025
Prospectus Date rr_ProspectusDate Feb. 28, 2025
Campbell Systematic Macro Fund  
Prospectus [Line Items] rr_ProspectusLineItems  
Supplement to Prospectus [Text Block] rr_SupplementToProspectusTextBlock

 

THE RBB FUND, INC.

Campbell Systematic Macro Fund (the “Fund”)

 

 

  

Supplement dated May 20, 2025

to the Prospectus dated February 28, 2025

 

 

 

1.Effective June 1, 2025, the sales load structure for the Fund’s Class A Shares will be modified for purchases exceeding $250,000. Accordingly, please note the following:

 

A.The section entitled “Summary Section – Expenses and Fees” is amended and restated in its entirety as shown below:
Expense [Heading] rr_ExpenseHeading Expenses and Fees
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund (the "Shares"). You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below. You may qualify for sales charge discounts if you invest at least $25,000 in Class A Shares of the Fund. More information about these discounts is available from your financial professional, in the section of this Prospectus entitled “Shareholder Information – Sales Charges” and in the section of the Fund’s Statement of Additional Information (“SAI”) entitled “Purchase and Redemption Information – Reducing or Eliminating the Front End Sales Charge.” Financial Intermediaries may impose different sales charge waivers for Class A Shares, and these variations are described in the section of this Prospectus entitled “Shareholder – Information – Sales Charges”.
Shareholder Fees Caption [Text] rr_ShareholderFeesCaption SHAREHOLDER FEES (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption ANNUAL FUND OPERATING EXPENSES (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination December 31, 2026
Expense Breakpoint Discounts [Text] rr_ExpenseBreakpointDiscounts You may qualify for sales charge discounts if you invest at least $25,000 in Class A Shares of the Fund.
Expense Breakpoint, Minimum Investment Required [Amount] rr_ExpenseBreakpointMinimumInvestmentRequiredAmount $ 25,000
Campbell Systematic Macro Fund | Class A  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice 3.50%
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 1.64%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25% [2]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.20%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.09%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [3]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.00%
Campbell Systematic Macro Fund | Class I  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice none [1]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 1.64%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none [2]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.20%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.84%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [3]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.75%
Campbell Systematic Macro Fund | Class C  
Prospectus [Line Items] rr_ProspectusLineItems  
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price) rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice none
Maximum Deferred Sales Charge (as a percentage of Offering Price) rr_MaximumDeferredSalesChargeOverOfferingPrice 1.00% [1]
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 1.64%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 1.00% [2]
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.20%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 2.84%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.09%) [3]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 2.75%
[1] A contingent deferred sales charge (“CDSC”) of 1.00% is assessed on redemptions of Class C shares made within twelve months after a purchase of Class C Shares.
[2] 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.
[3] 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.