THE RBB FUND INC.

Abbey Capital Multi Asset Fund (the “Fund”)

Class I Shares (Ticker: MAFIX)
Class A Shares (Ticker: MAFAX)
Class C Shares (Ticker: MAFCX)

_____________________________________________________________________

Supplement dated May 16, 2025

to the Statutory Prospectus, Summary Prospectus and

Statement of Additional Information (“SAI”) dated December 31, 2024

______________________________________________________________________

Effective June 2, 2025 the mailing address for the Fund has changed. Going forward, please send written requests to obtain Fund documentation, or to purchase, redeem, or exchange shares of the Fund to:  

Regular Mail:

Abbey Capital Multi Asset Fund

c/o U.S. Bank Global Fund Services 

PO Box 219252 

Kansas City, MO 64121-9252 

Overnight Delivery: 

Abbey Capital Multi Asset Fund

c/o U.S. Bank Global Fund Services 

801 Pennsylvania Ave, Suite 219252 

Kansas City, MO 64105-1307 

If you have any questions, please call the Funds at 1-844-261-6484.

Investors should retain this supplement for future reference.

THE RBB FUND INC.

Abbey Capital Futures Strategy Fund (the “Fund”)

Class I Shares (Ticker: ABYIX)

Class A Shares (Ticker: ABYAX)

Class C Shares (Ticker: ABYCX)

_____________________________________________________________________

Supplement dated May 16, 2025

to the Statutory Prospectus, Summary Prospectus and

Statement of Additional Information (“SAI”) dated December 31, 2024

______________________________________________________________________

Effective June 2, 2025, the mailing address for the Fund has changed. Going forward, please send written requests to obtain Fund documentation, or to purchase, redeem, or exchange shares of the Fund to:  

Regular Mail:

Abbey Capital Futures Strategy Fund

c/o U.S. Bank Global Fund Services 

PO Box 219252 

Kansas City, MO 64121-9252 

Overnight Delivery: 

Abbey Capital Futures Strategy Fund

c/o U.S. Bank Global Fund Services 

801 Pennsylvania Ave, Suite 219252 

Kansas City, MO 64105-1307 

If you have any questions, please call the Funds at 1-844-261-6484.

Investors should retain this supplement for future reference.