SEC Form 6-K filed by Quantum Biopharma Ltd.

UNITED STATES

SECURITIES AND EXCHANGECOMMISSION

Washington, D.C. 20549

Form 6-K

REPORT OF FOREIGN PRIVATEISSUER

PURSUANT TO RULE13a-16 OR 15d-16

UNDER THESECURITIES EXCHANGEACT OF 1934

For the month of: October2024

Commission File Number: 001-39152

55 University Ave., Suite 1003

Toronto, OntarioM5J2H7, Canada

(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.

Form 20-F ☒ Form 40-F ☐

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.

EXHIBIT INDEX