Northern Institutional Funds

04/02/2026 | Press release | Distributed by Public on 04/02/2026 12:31

Prospectus Certification by Investment Company (Form 497J)

Stradley Ronon Stevens & Young, LLP

100 Park Avenue

Suite 2000

New York, NY 10017

T: 212.812.4124

stradley.com

Jamie M. Gershkow

Partner

[email protected]

212.404.0654

April 2, 2026

VIA EDGAR TRANSMISSION

U.S. Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Re:

Northern Institutional Funds (the "Trust")

Post-Effective Amendment No. 114 (File No. 2-80543)

Amendment No. 147 (File No. 811-03605)

Ladies and Gentlemen:

In accordance with Rule 497(j) of Regulation C under the Securities Act of 1933, as amended, Northern Institutional Funds (the "Trust") certifies that:

a.

the forms of the Trust's (i) Treasury Portfolio, Treasury Instruments Portfolio, U.S. Government Portfolio and U.S. Government Select Portfolio - Shares, Service Shares and Premier Shares Prospectus; (ii) Treasury Portfolio, Treasury Instruments Portfolio and U.S. Government Select Portfolio - Siebert Williams Shank Shares Prospectus; (iii) Treasury Portfolio, Treasury Instruments Portfolio, U.S. Government Portfolio and U.S. Government Select Portfolio - Shares, Service Shares and Premier Shares Statement of Additional Information; and (iv) Treasury Portfolio, Treasury Instruments Portfolio, and U.S. Government Select Portfolio - Siebert Williams Shank Shares Statement of Additional Information that would have been filed under paragraph (c) of Rule 497 do not differ from those contained in Post-Effective Amendment No. 114 to the Trust's registration statement on From N-1A; and

b.

the text of Post-Effective Amendment No. 114 to the Trust's registration statement was filed with the Commission via EDGAR on March 27, 2026 (Accession No. 0001193125-26-128977) with an effective date of April 1, 2026.

Please direct any comments to the undersigned at (212) 404-0654, or, in my absence, Michael D. Mabry at (215) 564-8011.

  Very truly yours,

/s/ Jamie M. Gershkow

Jamie M. Gershkow

 Enclosures

cc:

Kevin P. O'Rourke

 Randal E. Rein

 Jose J. Del Real, Esq.

 Michael D. Mabry, Esq

Northern Institutional Funds published this content on April 02, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on April 02, 2026 at 18:31 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]