Genentech Board of Directors Arthur D. Levinson, Ph.D.
Chairman, Genentech Board of Directors

Prof. Sir John Irving Bell

William M. Burns
Chief Executive Officer, Roche Pharmaceuticals Division

Ian T. Clark
Chief Executive Officer, Genentech and Head of North American Commercial Operations

André Hoffmann

Dr. Erich Hunziker
Chief Financial Officer, Roche Group

Dr. Severin Schwan
Chief Executive Officer, Roche Group

Pascal Soriot
Chief Operating Officer, Roche Pharmaceuticals Division

Secretary to the Genentech Board of Directors Frederick C. Kentz, III
Senior Vice President, Secretary and Chief Compliance Officer, Head of Legal Affairs, North America