Michael Kranda

Vulcan Ventures, Inc.

Michael Kranda has served as a member of PTC's board of directors since December 2003. Since September 2006, Mr. Kranda has served as a consultant to Vulcan Capital, the private investment group of Vulcan Inc., and Mr. Kranda served as Managing Director of biotechnology venture investments at Vulcan Capital from September 2003 to September 2006. From July 1996 to July 2002, Mr. Kranda served as Chief Executive Officer at Oxford GlycoSciences, a biotechnology company. Prior to joining Oxford GlycoSciences, Mr. Kranda was President and Chief Operating Officer at Immunex Corporation (now Amgen), a biopharmaceutical company. Mr. Kranda currently serves as Chief Executive Officer and a director of BEAT BioTherapeutics Corporation, a gene therapy company. Mr. Kranda received a B.A. and an M.B.A from the University of Washington School of Business.