Post-Effective Amendment to Post-Effective Amendment by Investment Company (Form 485BXT)

Filed with the Securities and Exchange Commission on April 2, 2026

1933 Act Registration File No. 333-200168

1940 Act Registration File No. 811-23011

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940			[	X	]
Amendment No.	92		[	X	]

(Check appropriate box or boxes.)

THE RBB FUND TRUST

(Exact Name of Registrant as Specified in Charter)

(Address of Principal Executive Offices, including Zip Code)

Registrant's Telephone Number, including Area Code: (609) 731-6256

Copies to:

It is proposed that this filing will become effective (check appropriate box)

If appropriate, check the following box:

[

X

]

This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

EXPLANATORY NOTE

Designation of New Effective Date for Previously Filed Post-Effective Amendment

Post-Effective Amendment No. 81 (the "Amendment") was filed pursuant to Rule 485(a)(2) under the Securities Act of 1933, as amended (the "1933 Act"), on January 20, 2026 and pursuant to Rule 485(a)(2) would have become effective on April 5, 2026.

This Post-Effective Amendment No. 89 is being filed pursuant to Rule 485(b)(1)(iii) under the 1933 Act for the sole purpose of designating May 5, 2026 as the new date upon which the Amendment shall become effective.

This Post-Effective Amendment No. 89 incorporates by reference the information contained in Parts A, B and C of the Amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, as amended (the "1933 Act"), and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this Post-Effective Amendment to its Registration Statement under Rule 485(b) under the 1933 Act and has duly caused this Post-Effective Amendment to its Registration Statement to be signed on its behalf by the undersigned, thereto duly authorized, in the City of Short Hills and State of New Jersey on April 2, 2026.

THE RBB FUND TRUST By: /s/ Steven Plump Steven Plump President

Pursuant to the requirements of the 1933 Act, this Amendment to Registrant's Registration Statement has been signed below by the following persons in the capacities and on the date indicated.

THE RBB FUND, INC.

(the "Company")

THE RBB FUND TRUST

(the "Trust")

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Gregory P. Chandler, hereby constitutes and appoints Jillian L. Bosmann, Edward Paz, Steven Plump, and James G. Shaw his true and lawful attorneys, to execute in his name, place, and stead, in his capacity as Director/Trustee or officer, or both, of the Company and of the Trust, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the U.S. Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in his name and on his behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as he might or could do in person, said acts of said attorneys being hereby ratified and approved.

THE RBB FUND, INC.

(the "Company")

THE RBB FUND TRUST

(the "Trust")

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Lisa A. Dolly, hereby constitutes and appoints Jillian L. Bosmann, Edward Paz, Steven Plump, and James G. Shaw her true and lawful attorneys, to execute in her name, place, and stead, in her capacity as Director/Trustee or officer, or both, of the Company and of the Trust, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the U.S. Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in her name and on her behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as she might or could do in person, said acts of said attorneys being hereby ratified and approved.

THE RBB FUND, INC.

(the "Company")

THE RBB FUND TRUST

(the "Trust")

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Nicholas A. Giordano, hereby constitutes and appoints Jillian L. Bosmann, Edward Paz, Steven Plump, and James G. Shaw his true and lawful attorneys, to execute in his name, place, and stead, in his capacity as Director/Trustee or officer, or both, of the Company and of the Trust, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the U.S. Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in his name and on his behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as he might or could do in person, said acts of said attorneys being hereby ratified and approved.

THE RBB FUND, INC.

(the "Company")

THE RBB FUND TRUST

(the "Trust")

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Arnold M. Reichman, hereby constitutes and appoints Jillian L. Bosmann, Edward Paz, Steven Plump, and James G. Shaw his true and lawful attorneys, to execute in his name, place, and stead, in his capacity as Director/Trustee or officer, or both, of the Company and of the Trust, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the U.S. Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in his name and on his behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as he might or could do in person, said acts of said attorneys being hereby ratified and approved.

THE RBB FUND, INC.

(the "Company")

THE RBB FUND TRUST

(the "Trust")

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Robert Sablowsky, hereby constitutes and appoints Jillian L. Bosmann, Edward Paz, Steven Plump, and James G. Shaw his true and lawful attorneys, to execute in his name, place, and stead, in his capacity as Director/Trustee or officer, or both, of the Company and of the Trust, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the U.S. Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in his name and on his behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as he might or could do in person, said acts of said attorneys being hereby ratified and approved.

THE RBB FUND, INC.

(the "Company")

THE RBB FUND TRUST

(the "Trust")

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Brian T. Shea, hereby constitutes and appoints Jillian L. Bosmann, Edward Paz, Steven Plump, and James G. Shaw his true and lawful attorneys, to execute in his name, place, and stead, in his capacity as Director/Trustee or officer, or both, of the Company and of the Trust, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the U.S. Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in his name and on his behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as he might or could do in person, said acts of said attorneys being hereby ratified and approved.

THE RBB FUND, INC.

(the "Company")

THE RBB FUND TRUST

(the "Trust")

POWER OF ATTORNEY

Know All Men by These Presents, that the undersigned, Martha A. Tirinnanzi, hereby constitutes and appoints Jillian L. Bosmann, Edward Paz, Steven Plump, and James G. Shaw her true and lawful attorneys, to execute in her name, place, and stead, in her capacity as Director/Trustee or officer, or both, of the Company and of the Trust, the Registration Statement and any amendments thereto and all instruments necessary or incidental in connection therewith, and to file the same with the U.S. Securities and Exchange Commission; and said attorneys shall have full power and authority to do and perform in her name and on her behalf, in any and all capacities, every act whatsoever requisite or necessary to be done in the premises, as fully and to all intents and purposes as she might or could do in person, said acts of said attorneys being hereby ratified and approved.