As filed with the Securities and Exchange Commission on October 23, 2026

Securities Act File No. 333-288251

Investment Company Act File No. 811-24099

U.S. SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-1A

FIS TRUST

(Exact Name of Registrant as Specified in its Charter)

8080 North Central Expressway, Suite 1700,

Dallas, Texas 75206

(Address of Principal Executive Offices)

Registrant’s Telephone Number, including Area Code: 480.295.7020

The Corporation Trust Company

Corporation Trust Center

1209 Orange Street

New Castle County, Wilmington, DE 19801

(Name and address of agent for service)

Copy to:

Steven T. Nelson

Faith Investor Services LLC

8080 North Central Expressway, Suite 1700,

Dallas, Texas 75206

Bibb L. Strench, Esq.
Thompson Hine LLP
1919 M Street, N.W., Suite 700
Washington, D.C. 20036

Approximate Date of Proposed Public Offering: As soon as practicable after the effective date of the Registration Statement.

It is proposed that this filing will become effective:

☐ Immediately upon filing pursuant to paragraph (b)

☒ On October 28, 2026 pursuant to paragraph (b)

☐ 60 days after filing pursuant to paragraph (a)(1)

☐ On (date) pursuant to paragraph (a)(1)

☐ 75 days after filing pursuant to paragraph (a)(2)

☐ On (date) pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:

☒ This post-effective amendment designates a new effective date for a previously filed post-effective amendment

Parts A, B and C filed in Post-Effective Amendment No. 15 to the Registration Statement of FIS Trust on behalf of FIS Bright Portfolios Core Bond ETF as filed with the Securities and Exchange Commission pursuant to Rule 485(a) under the Securities Act of 1933 on August 26, 2026 (Accession Number 0001999371-26-018746), are herein incorporated by reference. This filing is being made pursuant to Rule 485(b)(1)(iii) under the Securities Act of 1933 for the sole purpose of designating October 28, 2026, as the new effective date for Post-Effective Amendment No. 15.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirement for effectiveness of this Registration Statement under rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Scottsdale, State of Arizona, on the 23^rd day of October 2026.

Pursuant to the requirements of the Securities Act, this Registration Statement has been signed below by the following persons in their indicated capacities.