Release Details

SOUTH PLAINFIELD, NJ – May 21, 2014 –PTC Therapeutics, Inc. (NASDAQ: PTCT) today announced that they will present a company overview at the Jefferies 2014 Global Healthcare Conference on Wednesday, June 4th at 2:00 pm ET at the Grand Hyatt in New York City.

The presentation will be webcast live on the Events and Presentations page under the investor relations section of PTC Therapeutics' website at www.ptcbio.com. The presentation will be archived for two weeks following the presentation. It is recommended that users connect to PTC's website several minutes prior to the start of the webcast to ensure a timely connection. PTC's current Investor Presentation slide deck is available at the same website location.

ABOUT PTC THERAPEUTICS, INC. PTC is a biopharmaceutical company focused on the discovery and development of orally administered, proprietary small molecule drugs that target post-transcriptional control processes. Post-transcriptional control processes regulate the rate and timing of protein production and are essential to proper cellular function. PTC's internally discovered pipeline addresses multiple therapeutic areas, including rare disorders, oncology and infectious diseases. PTC has developed proprietary technologies that it applies in its drug discovery activities and which form the basis for collaborations with leading biopharmaceutical companies. For more information on the company, please visit our website www.ptcbio.com.

FOR MORE INFORMATION PLEASE CONTACT Jane Baj +1 (908) 912-9167 jbaj@ptcbio.com