6-K - Biophytis SA (0001768946) (Filer)

UNITED STATES SECURITIES

AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Date of report: October 23, 2026

Commission File Number: 001-38974

BIOPHYTIS S.A.

(Translation of registrant’s name into English)

Stanislas Veillet
Biophytis S.A.

Silver Innov

54 rue Molière

94200 Ivry sur Seine, France

+33 1 76 28 40 83

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F:

x Form 20-F ¨ Form 40-F

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨

On October 22, 2026, Biophytis S.A. issued a press release announcing that Biophytis’ Ordinary and Extraordinary General Meeting will be held on November 12, 2026. A copy of the press release is attached as Exhibit 99.1 to this Form 6-K.

EXHIBIT LIST

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.