UNITED STATES SECURITIES AND EXCHANGE COMMISSION ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2025 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from ___________ to __________ Commission file number: 001-36199 Washington, D.C. 20549 FORM 10-Q (Mark One) PULMATRIX, INC. (Exact name of registrant as specified in its charter) Delaware 46-1821392 (St ...