On June 18, 2019, Daniel Janney notified Sutro Biopharma, Inc. of his decision to resign from the Company’s Board of Directors, including as the Chair of the Board and from the Compensation Committee and the Nominating and Governance Committee, effective June 24, 2019. On June 21, 2019, the Board appointed Connie Matsui as a Class II director, Chair of the Board, Chair and member of the Nominating and Governance Committee and member of the Compensation Committee, effective as of June 24, 2019.