Pulmatrix (PULM) 10-Q 2021 Q1 Quarterly report

Exhibit 32.1

CERTIFICATIONS UNDER SECTION 906

Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), each of the undersigned officers of Pulmatrix, Inc., a Delaware corporation (the “Company”), does hereby certify, to such officer’s knowledge and in the capacity of an officer, that:

The Quarterly Report for the quarter ended March 31, 2021 (the “Form 10-Q”) of the Company fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, and the information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Company as of, and for, the periods presented in the Form 10-Q.

Date: May 11, 2021	By:	/s/ Teofilo Raad
		Teofilo Raad
		President and Chief Executive Officer (Principal Executive Officer)
Date: May 11, 2021	By:	/s/ Michelle S. Siegert.
		Michelle S. Siegert.
		Vice President, Finance (Principal Financial Officer)