Forum Funds

05/01/2026 | Press release | Distributed by Public on 05/01/2026 10:28

Prospectus Certification by Investment Company (Form 497J)

FORUM FUNDS

190 MIDDLE STREET, SUITE 101

PORTLAND, MAINE 04101

207-347-2000

May 01, 2026

VIA EDGAR

U.S. Securities and Exchange Commission

100 F Street, N.E.

Washington, D.C. 20549

Re: Forum Funds (the "Registrant")
File No.: 002-67052/811-03023
Filing pursuant to Rule 497(j)

Ladies and Gentlemen:

On behalf of the Registrant, a Delaware statutory trust, and pursuant to Rule 497(j) of the Securities Act of 1933, as amended, the Registrant certifies that the Prospectus and Statement of Additional Information for the Lisanti Small Cap Growth Fund, dated May 01, 2026 do not differ from those contained in the Registration Statement of the Registrant which was filed electronically via EDGAR on April 22, 2026 (accession number 0001398344-26-006851).

If you have any questions related to this filing, please do not hesitate to contact me at (207) 347-2038 or [email protected].

Sincerely,

/s/ Lindsey Dorval

Lindsey Dorval, Esq.

Vice President and Secretary to the Registrant

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