Hollings Renton has previously served as the Chief Executive Officer and President of Onyx Pharmaceuticals from 1993 to 2008 and as the Chairman of the Board from 2000 to 2008. From 1991 to 1993, Mr. Renton served as President and Chief Operating Officer of Chiron Corporation, a pharmaceutical company, following its acquisition of Cetus Corporation. He served as President of Cetus Corporation from 1990 to 1991, as Chief Operating Officer from 1987 to 1990, and as Chief Financial Officer from 1983 to 1987. Mr. Renton serves as chairman of the board of Portola Pharmaceuticals, Inc. He previously served on the boards of directors of Cepheid, Inc., Kythera Biopharmaceuticals, Inc., Rigel Pharmaceuticals, Inc., Affymax, Inc., Sangstat Medical Corporation, Special Olympics Northern California and the Biotechnology Industry Organization. Mr. Renton received a B.S. in Mathematics from Colorado State University and a M.B.A. from the University of Michigan.