AS FILED WITH THE U.S. SECURITIES AND EXCHANGE COMMISSION ON OCTOBER 10, 2025

1933 Act Registration File No.: 333-264478

1940 Act File No.: 811-23793

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

TIDAL TRUST II

(Exact Name of Registrant as Specified in Charter)

c/o Tidal ETF Services LLC

234 West Florida Street, Suite 203

Milwaukee, Wisconsin 53204

(Address of Principal Executive Offices, Zip Code)

(Registrant’s Telephone Number, including Area Code) (855) 843-2534

The Corporation Trust Company

1209 Orange Street

Corporation Trust Center

Wilmington, DE 19801

(Name and Address of Agent for Service)

Copies to:

Approximate date of proposed public offering: As soon as practicable after the effective date of this registration statement.

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

If appropriate, check the following box:

EXPLANATORY NOTE

Designation of New Effective Date for Previously Filed Amendment

Post-Effective Amendment No. 359 (the “Amendment”) was filed pursuant to Rule 485(a)(2) under the Securities Act of 1933 on June 3, 2025, and pursuant to Rule 485(a)(2) would have become effective on August 17, 2025.

Post-Effective Amendment No. 398 was filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating September 15, 2025, as the new date upon which the Amendment would have become effective.

Post-Effective Amendment No. 426 was filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating October 13, 2025, as the new date upon which the Amendment would have become effective.

This Post-Effective Amendment No. 444 is being filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating November 12, 2025, as the new date upon which the Amendment shall become effective.

This Post-Effective Amendment No. 444 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 “Securities 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 No. 444 to its Registration Statement on Form N-1A under Rule 485(b) under the Securities Act and has duly caused this Post-Effective Amendment No. 444 to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Milwaukee, State of Wisconsin, on October 10, 2025.

Pursuant to the requirements of the Securities Act, this Post-Effective Amendment No. 444 to its Registration Statement has been signed below by the following persons in the capacities indicated on October 10, 2025.