On March 14, 2019, Ardelyx, Inc. appointed Geoffrey A. Block, M.D. as a member of its board of directors, effective immediately, to serve in Class II until the 2019 Annual Meeting of Stockholders and until his successor is duly elected and qualified, or until his earlier death, resignation or removal. Dr. Block was also appointed to serve as a member of the Nominating and Goverance Committee of the Board effective June 13, 2019.