Form 8-A12B RBB FUND, INC.

Title of each class of securities to be registered	Name of each exchange on which each class is to be registered
F/m Accumulator Ultrashort U.S. Treasury Fund	The Nasdaq Stock Market LLC

If this form relates to the registration of a class of securities pursuant to Section 12(b) of the Exchange Act and is effective pursuant to General Instruction A.(c), check the following box.	☑
If this form relates to the registration of a class of securities pursuant to Section 12(g) of the Exchange Act and is effective pursuant to General Instruction A.(d), check the following box.	☐
Securities Act Registration file number to which this form relates:  033-20827
Securities to be registered pursuant to Section 12(g) of the Act:  Not applicable.

Title of Each Class of Securities to be Registered	IRS Employer ID Number
F/m Accumulator Ultrashort U.S. Treasury Fund	42-2285226

A.	Registrant’s Articles of Incorporation are incorporated herein by reference to Exhibit (a) to the Registrant’s Registration Statement on Form N-1A (File Nos. 033-20827 and 811-05518), as filed with the SEC via EDGAR on October 30, 1998 (Accession Number: 0000925069-98-000189).
B.	Articles Supplementary of Registrant are incorporated herein by reference to Exhibit (a)(139) to the Registrant’s Registration Statement on Form N-1A (File Nos. 033-20827 and 811-05518), as filed with the SEC via EDGAR on June 9, 2026 (Accession No. 0001398344-26-010640).

C.	Registrant’s By-Laws are incorporated herein by reference to Exhibit (b)(1) to the Registrant’s Registration Statement on Form N-1A (File Nos. 033-20827 and 811-05518), as filed with the SEC via EDGAR on September 27, 2021 (Accession No. 0001398344-21-019227).

The RBB Fund, Inc.

June 9, 2026

/s/ James G. Shaw

James G. Shaw Chief Financial Officer, Chief Operating Officer, and Secretary

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