Ian T. Clark joined BioMarin’s Board in August 2025. Mr. Clark served as Chief Executive Officer of Genentech and a member of the company’s Board of Directors from 2010 until his retirement in 2016. Under his leadership, Genentech launched 15 new drugs. Prior to serving as CEO, Mr. Clark held a number of senior management positions at Genentech/Roche, including Head of Global Product Strategy, Executive Vice President, Commercial Operations, and Senior Vice President and General Manager of BioOncology. Before joining Genentech, Mr. Clark spent 23 years in the biopharmaceutical industry in senior roles at Novartis International AG, Sanofi S.A., Ivax Pharmaceuticals and G.D. Searle.

Mr. Clark serves as a member of the boards of directors of Olema Oncology, Takeda Pharmaceutical Company Ltd., Kyverna Therapeutics, Inc., Corvus Pharmaceuticals, Inc. and Guardant Health, Inc. Mr. Clark is currently an advisor to KKR & Co. Inc., and previously served on the Board of the Biotechnology Industry Organization, as well as a member of the 12th District Economic Advisory Council of the Federal Reserve.

Mr. Clark received a Bachelor of Science and an honorary doctorate in biological sciences from Southampton University in the United Kingdom.