Company: CSCIF
Filing Date: 2025-11-12
Form Type: 6-K
Source: 0001493152-25-021774
Chunk: 0

Company: COSCIENS Biopharma Inc.
Filing Date: 2025-11-12
Form: 6-K
Chunk 0
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<div align='center'>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 OF THE SECURITIES EXCHANGE ACT OF 1934

For the month of November, 2025

Commission File Number: 001-38064

COSCIENS Biopharma Inc.

(Translation of registrant’s name into English)

c/o Norton Rose Fulbright Canada, LLP, 222 Bay Street, Suite 3000, PO Box 53, Toronto ON M5K 1E7

(Address of principal executive office)</div>

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

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):

Exhibit 99.1, 99.2, 99.3, and 99.4 included with this Report on Form 6-K is hereby incorporated by reference into the Company’s Registration Statements on Form S-8 (No. 333-224737, No. 333-210561, No. 333-200834and No. 333-279844) (collectively, the “Registration Statements”) and shall be deemed to be a part thereof from the date on which this Report on Form 6-K is furnished, to the extent not superseded by documents or reports subsequently filed or furnished. The information contained on any websites referenced in Exhibit 99.2 included with this Report on Form 6-K is not incorporated by reference or deemed to be a part of this Report on Form 6-K or any of the Registration Statements.

Forward-Looking Statements

The information in this Report on Form 6-K and the exhibit attached hereto and incorporated herein by reference include forward-looking statements within the meaning of the U.S. Private Securities Litigation Reform Act of 1995, specifically Section 27A of the U.S. Securities Act of 1933, as amended, Section 21E of the U.S. Securities Exchange Act