Sierra Oncology, Inc. announced that on July 1, 2022, and as a result of the consummation of Merger, Justin T. Huang and Kevin Thomas Ryan became the directors of Sierra Oncology. Effective as of July 1, 2022, the following persons, who were directors of Sierra Oncology prior to the effective time of the Merger, are no longer directors of Sierra Oncology: Stephen G. Dilly, Gaurav Aggarwal, Andrew Allen, Mona Ashiya, Craig A. Collard, Jeffrey H, Cooper, Georgia L. Erbez, Christy J. Oliger, Robert Pelzer, and Andrew Sinclair.