PTC Therapeutics, Inc. (Nasdaq: PTCT) announced today that it is commencing a public offering of $100.0 million of shares of its common stock. PTC intends to grant the underwriter an option for a period of 30 days to purchase up to an additional $15.0 million of shares of common stock. The offering is subject to market conditions and other factors, and there can be no assurance as to whether or when the offering may be completed.

Credit Suisse is acting as the sole bookrunning manager for the public offering of common stock.

About PTC Therapeutics, Inc.

PTC is a science-led, global biopharmaceutical company focused on the discovery, development and commercialization of clinically-differentiated medicines that provide benefits to patients with rare disorders. PTC's ability to globally commercialize products is the foundation that drives investment in a robust pipeline of transformative medicines and our mission to provide access to best-in-class treatments for patients who have an unmet medical need.