LOOMIS SAYLES FUNDS II

May 5, 2026

VIA EDGAR

U.S. Securities and Exchange Commission

100 F Street, NE

Washington, DC 20549

Dear Sir or Madam:

Pursuant to Rule 497(j) of the Securities Act of 1933, as amended, I hereby certify that the Statement of Additional Information, dated May 1, 2026, for the Loomis Sayles High Income Fund, Loomis Sayles International Growth Fund, Loomis Sayles Investment Grade Bond Fund and Loomis Sayles Strategic Income Fund, each a series of Loomis Sayles Funds II, do not differ from those contained in Post-Effective Amendment No. 114 that was filed electronically on April 29, 2026.

Please direct any questions or comments on the enclosed materials to me at (617) 449-2818.