Pulmatrix, Inc. (NASDAQ: PULM) today announced the closing of its previously announced underwritten public offering of an aggregate of 1,719,554 common units and 8,947,112 pre-funded units at a price to the public of $1.35 per common unit and $1.34 per pre-funded unit, as well as the purchase of an additional 1,599,999 shares of common stock and common warrants to purchase an additional 1,599,999 shares of common stock purchased pursuant to the exercise in full of the underwriter's option to purchase additional securities. Each common unit contains one share of common stock (or, in the case of the pre-funded units, one pre-funded warrant) and one common warrant to purchase a share of common stock.

H.C. Wainwright & Co. acted as the sole book-running manager for the offering.

The gross proceeds of the offering are expected to be approximately $16.6 million, including the full exercise of the underwriter's option to purchase additional securities and assuming the receipt of the proceeds from the full exercise of the pre-funded warrants, but prior to deducting underwriting discounts and commissions and other offering expenses. The Company intends to use the net proceeds of this offering for research and development of its therapeutic candidates, particularly the development of Pulmazole, as well as for working capital and general corporate purposes.

Each common warrant has an exercise price of $1.35 per share, is exercisable immediately and will expire five years from the date of issuance. Each pre-funded warrant has an exercise price of $0.01 per share and is exercisable until all other pre-funded warrants have been exercised in full.

About Pulmatrix

Pulmatrix is a clinical stage biopharmaceutical company developing innovative inhaled therapies to address serious pulmonary disease using its patented iSPERSE™ technology. The Company's proprietary product pipeline is focused on advancing treatments for serious lung diseases, including Pulmazole, inhaled anti-fungal itraconazole for patients with ABPA, and PUR1800, a narrow spectrum kinase inhibitor for patients with obstructive lung diseases including asthma and chronic obstructive pulmonary disease ("COPD"). Pulmatrix's product candidates are based on iSPERSE™, its proprietary engineered dry powder delivery platform, which seeks to improve therapeutic delivery to the lungs by maximizing local concentrations and reducing systemic side effects to improve patient outcomes.