Prospectus Certification by Investment Company (Form 497J)

May 4, 2026

VIA EDGAR SYSTEM

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

Ladies & Gentlemen:

The undersigned officer of Parnassus Funds (the "Registrant") does hereby certify pursuant to Rule 497(j) promulgated under the Securities Act of 1933, as amended (the "1933 Act"):

1.  that the form of prospectus and statement of additional information that would have been filed under paragraph (c) of Rule 497 promulgated under the 1933 Act, would not have differed from that contained in Post-Effective Amendment No. 64 to the Form N-1A registration statement under the 1933 Act filed by the Registrant on April 30, 2026, which became effective on April 30, 2026, and is the most recent amendment to such registration statement; and

2.  that the text of Post-Effective Amendment No. 64 was filed with the Securities and Exchange Commission by direct transmittal through the EDGAR system on April 30, 2026.

Very truly yours,

PARNASSUS FUNDS

By: /s/ John V. Skidmore II

John V. Skidmore II

Chief Compliance Officer