Board of Directors Company Overview Leadership Board of Directors David V. Goeddel, Ph.D. John Josey, Ph.D. Brett A. Ringle, J.D. William R. Sellers, M.D. Steve Winick, J.D. Board Advisors Michael S. Brown, M.D. Thilo Schroeder, Ph.D. Jim Tananbaum, M.D. McHenry T. Tichenor, Jr. Brett Zbar, M.D. Scientific Advisory Board DAVID V. GOEDDEL, PH.D. Chairman of the Board JOHN A. JOSEY, PH.D. BRETT A. RINGLE, J.D. WILLIAM R. SELLERS, M.D. STEVE WINICK, J.D. Board Advisors MICHAEL S. BROWN, M.D. THILO SCHROEDER, PH.D. JIM TANANBAUM, M.D. MCHENRY T. TICHENOR, JR. BRETT ZBAR, M.D.