Document

Pursuant to Rule 497(j) under the Securities Act of 1933, as amended, the Investment Company Act of 1940, as amended, and the regulations thereunder, the Trust on behalf of its series, the Osterweis Fund, Osterweis Strategic Income Fund, Osterweis Growth & Income Fund, and Osterweis Opportunity Fund (the “Funds”), hereby certifies that the forms of Prospectus and Statement of Additional Information that would have been filed under Rule 497(c) would not have differed from that contained in the most recent amendment for the Funds dated June 30, 2026, and filed electronically as Post-Effective Amendment No. 906 to the Funds’ Registration Statement on Form N-1A on June 30, 2026.