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

Filed with the U.S. Securities and Exchange Commission on December 16, 2025

1933 Act Registration File No. 033-12213

1940 Act File No. 811-05037

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

[

X

]

Pre-Effective Amendment No.

[

]

Post-Effective Amendment No.

897

[

X

]

and

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940

[

X

]

Amendment No.

898

[

X

]

(Check appropriate box or boxes.)

PROFESSIONALLY MANAGED PORTFOLIOS

(Exact Name of Registrant as Specified in Charter)

615 East Michigan Street

Milwaukee, Wisconsin 53202

(Address of Principal Executive Offices) (Zip Code)

Registrant's Telephone Number, Including Area Code: (626) 914-7363

Jason F. Hadler Professionally Managed Portfolios 777 East Wisconsin Avenue Milwaukee, Wisconsin 53202 (Name and Address of Agent for Service)						Copy to: Rachael Schwartz, Esq. Sullivan & Worcester LLP 1251 Avenue of the Americas, 19th Floor New York, New York 10020

As soon as practical after the effective date of this Registration Statement

Approximate Date of Proposed Public Offering

It is proposed that this filing will become effective

☐			immediately upon filing pursuant to paragraph (b)
☒			on January 14, 2026 pursuant to paragraph (b)
☐			60 days after filing pursuant to paragraph (a)(1)
☐			on __________ pursuant to paragraph (a)(1)
☐			75 days after filing pursuant to paragraph (a)(2)
☐			on __________ pursuant to paragraph (a)(2) of Rule 485.

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 Amendment

Post-Effective Amendment No. 894 (the "Amendment") was filed pursuant to Rule 485(a)(2) under the Securities Act of 1933 on October 3, 2025, and pursuant to Rule 485(a)(2) would have become effective on December 17, 2025.

This Post-Effective Amendment No. 897 is being filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating January 14, 2026, as the new date upon which the Amendment shall become effective.

This Post-Effective Amendment No. 897 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, and the Investment Company Act of 1940, as amended, the Registrant certifies that it meets all of the requirements for effectiveness of this registration statement under rule 485(b) under the Securities Act and has duly caused this Post-Effective Amendment No. 897 to its Registration Statement on Form N-1A to be signed below on its behalf by the undersigned, duly authorized, in the City of Milwaukee and State of Wisconsin, on December 16, 2025.

Professionally Managed Portfolios

By: /s/ Jason F. Hadler

Jason F. Hadler

President

Pursuant to the requirements of the 1933 Act, this Post-Effective Amendment No. 897 to its Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.

Signature			Title			Date
Kathleen T. Barr*			Trustee			December 16, 2025
Kathleen T. Barr
Eric W. Falkeis*			Trustee			December 16, 2025
Eric W. Falkeis
Steven J. Paggioli*			Trustee			December 16, 2025
Steven J. Paggioli
Ashi S. Parikh*			Trustee			December 16, 2025
Ashi S. Parikh
Cynthia M. Fornelli*			Trustee			December 16, 2025
Cynthia M. Fornelli
/s/Jason F. Hadler			President and Principal			December 16, 2025
Jason F. Hadler			Executive Officer
/s/ Craig Benton			Vice President, Treasurer and Principal			December 16, 2025
Craig Benton			Financial and Accounting Officer
*By: /s/ Elaine E. Richards						December 16, 2025
Elaine E. Richards, Attorney-In Fact pursuant to Power of Attorney