PTC Therapeutics, Inc. (NASDAQ:PTCT - Get Free Report) Director Michael Schmertzler sold 10,000 shares of the firm's stock in a transaction on Wednesday, September 16th. The shares were sold at an average price of $67.12, for a total value of $671,200.00. Following the transaction, the director directly owned 1,306,594 shares of the company's stock, valued at $87,698,589.28. This represents a 0.76% decrease in their position. The sale was disclo…