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Exhibit 32.1

 

CERTIFICATIONS OF PRINCIPAL EXECUTIVE OFFICER AND PRINCIPAL FINANCIAL OFFICER

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

AS ADOPTED PURSUANT TO SECTION 906

OF THE SARBANES-OXLEY ACT OF 2002

 

In connection with the Quarterly Report on Form 10-Q (the “Report”) of 4D Molecular Therapeutics, Inc. (the “Company”) for the period ended June 30, 2025, David Kirn, as Chief Executive Officer of the Company, and Uneek Mehra, as Principal Financial and Accounting Officer of the Company, each hereby certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to the best of his knowledge:

 

a)
the Company’s Report for the period ended June 30, 2025 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

 

b)
the information contained in such Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

 

Dated: August 11, 2025

 

By:

/s/ David Kirn

 

David Kirn

 

Chief Executive Officer

 

(Principal Executive Officer)

 

Dated: August 11, 2025

 

By:

/s/ Uneek Mehra

 

Uneek Mehra

 

Principal Financial and Accounting Officer