William Rastetter,

William H. Rastetter, Ph.D.

Lead Independent Director

Bill has served as a director since January 2014 and as lead independent director since April 2014. He is a Co-Founder of Receptos, Inc., a biopharmaceutical company, where he serves as Director and Chairman of the Board, and previously held the role of Acting Chief Executive Officer. Dr. Rastetter served as a Partner at the venture capital firm of Venrock Associates. Prior to his tenure with Venrock, Dr. Rastetter was Executive Chairman of Biogen Idec, from the merger of the two companies (Biogen and Idec Pharmaceuticals). He joined Idec Pharmaceuticals as Chairman and Chief Executive Officer. Prior to Idec, he was Director of Corporate Ventures at Genentech, Inc. and served as well in a scientific capacity at Genentech. Dr. Rastetter also serves as the Chairman of public life sciences companies Illumina, Inc., Neurocrine Biosciences, Inc. Fate Therapeutics Inc., and Receptos, Inc. and as a director of Regulus Therapeutics, Inc. Dr. Rastetter has held various faculty positions at the Massachusetts Institute of Technology and Harvard University and is an Alfred P. Sloan Fellow. Dr. Rastetter holds a B.S. from the Massachusetts Institute of Technology and received his M.A. and Ph.D. from Harvard University.