Portola Pharmaceuticals, Inc. announced that William Lis has informed the Board of Directors of his plans to retire as Chief Executive Officer and member of the board. Mr. Lis will continue to serve as CEO and member of the board through August 1, 2018 to ensure a smooth transition, after which time he will remain in an advisory role. Mr. Lis joined Portola in 2008.

In the interim, the board has appointed John T. Curnutte, M.D., Ph.D., and Mardi C. Dier as interim Co-Presidents in addition to their current positions as the Company's Executive Vice President, Research and Development and Chief Financial Officer, respectively.