AS FILED WITH THE U.S. SECURITIES AND EXCHANGE COMMISSION ON JULY 2, 2026

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 700
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. 532 (the “Amendment”) was filed pursuant to Rule 485(a)(1) under the Securities Act of 1933 on February 17, 2026, and pursuant to Rule 485(a)(1) would have become effective on April 18, 2026.

Post-Effective Amendment No. 576 was filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating April 24, 2026, as the new date upon which the Amendment would have become effective.

Post-Effective Amendment No. 584 was filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating May 8, 2026, as the new date upon which the Amendment would have become effective.

Post-Effective Amendment No. 599 was filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating May 22, 2026, as the new date upon which the Amendment would have become effective.

Post-Effective Amendment No. 611 was filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating June 5, 2026, as the new date upon which the Amendment would have become effective.

Post-Effective Amendment No. 619 was filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating July 2, 2026, as the new date upon which the Amendment would have become effective.

This Post-Effective Amendment No. 657 is being filed pursuant to Rule 485(b)(1)(iii) for the sole purpose of designating July 31, 2026, as the new date upon which the Amendment shall become effective.

This Post-Effective Amendment No. 657 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. 657 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. 657 to its Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Milwaukee, State of Wisconsin, on July 2, 2026.

Pursuant to the requirements of the Securities Act, this Post-Effective Amendment No. 657 to its Registration Statement has been signed below by the following persons in the capacities indicated on July 2, 2026.