Form 485APOS Fidelity Rutland Square

Securities Act of 1933 Registration No. 333-139427

Investment Company Act of 1940 Registration No. 811-21991

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 [X]

[ ] Pre-Effective Amendment No.  ______

[X] Post-Effective Amendment No.  135

and

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 [X]

[X] Amendment No.  138

Fidelity Rutland Square Trust II

 (Exact Name of Registrant as Specified in Charter)

245 Summer Street, Boston, Massachusetts 02210

(Address of Principal Executive Offices)(Zip Code)

Registrant’s Telephone Number: 617-563-7000

It is proposed that this filing will become effective on December 26, 2025 pursuant to paragraph (a)(2) of Rule 485 at 5:30 p.m. Eastern Time.