Agile Therapeutics Inc. priced an underwritten public offering of 5,333,334 common shares at $3.75 apiece for gross proceeds of about $20 million.

The company also granted underwriters a 30-day option to buy up to an additional 800,000 of the shares offered.

William Blair, RBC Capital Markets and Cantor Fitzgerald & Co. are acting as joint book-running managers for the offering. Janney Montgomery Scott is also acting as lead manager, and Noble Capital Markets is acting as a co-manager.

The offering is expected to close by Aug. 8.