As filed with the Securities and Exchange Commission on August 3, 2026

1933 Act Registration No. 333-283221
1940 Act Registration No. 811-24023

United States
Securities and Exchange Commission
Washington, D.C. 20549

Form N-1A

REX ETF Trust
777 Brickell Avenue, Suite 500
Miami, Florida 33131
(203) 654-7008
(Registrant’s Exact Name, Address and Telephone Number)

Robert Rokose
Chief Financial Officer
REX Advisers, LLC
1241 Post Road
Fairfield, Connecticut 06824
(Name and Address of Agent for Service)

Copy to:

Morrison C. Warren, Esq.
Chapman and Cutler LLP
320 South Canal Street
Chicago, Illinois 60606

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

If appropriate, check the following box:

Contents of Registration Statement

This Registration Statement comprises the following papers and contents:

The Facing Sheet

The sole purpose of this filing is to delay the effectiveness of the Registrant’s Post-Effective Amendment No. 96, as it relates to the REX AI Compute Power ETF, REX 2x AI Compute Power ETF and REX -1x AI Compute Power ETF (each, a “Fund” and collectively, the “Funds”), each a series of the Registrant, until September 2, 2026. Parts A, B and C of the Registrant’s Post-Effective Amendment No. 96, filed on May 21, 2026 are incorporated by reference herein.

Signatures

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 Registration Statement to be signed on its behalf by the undersigned, duly authorized in the City of Miami, and State of Florida, on the 3rd day of August, 2026.

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities and on the date indicated:

* An original powers of attorney authorizing Gregory Collett and Robert Rokose to execute the Registrant’s Registration Statement, and amendments thereto, for each of the trustees of the Registrant on whose behalf this Registration Statement is filed, were previously executed, filed as an exhibit and are incorporated by reference herein.