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Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, Jodie Morrison, Chief Executive Officer of Q32 Bio, Inc. (the “Company”) hereby certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1)
The Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2024 (the “Report”) fully complies with the requirements of Sections 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and
(2)
The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 

Date: March 11, 2025

By:

/s/ Jodie Morrison

Jodie Morrison

Chief Executive Officer and Director

(principal executive officer)