Sandra J. Horning, M.D. has served as a member of our Board of Directors since November 2020. Dr. Horning served as the Chief Medical Officer and Global Head of Product Development of Roche, Inc., a healthcare company, from January 2014 until her retirement in October 2019, and prior to that as Global Head of Oncology Product Development of Roche, Inc. from September 2009 to December 2013. From July 1980 until August 2009, Dr. Horning was a practicing oncologist, investigator and tenured professor at Stanford University School of Medicine, where she remains a professor of medicine emerita. From 2005 to 2006, Dr. Horning served as the President of the American Society of Clinical Oncology. Dr. Horning served as a member of the board of directors of Foundation Medicine, Inc., a molecular information company, from April 2015 to July 2018, and EQRx, Inc., a biotechnology company, from August 2020 to November 2023. She has also served as a member of the board of directors of Moderna, Inc., a pharmaceutical and biotechnology company, since March 2020, Gilead Sciences, Inc., a biopharmaceutical company, since January 2020, and Revolution Medicines, Inc., a biotechnology company, since November 2023. Dr. Horning received an M.D. from the University of Iowa School of Medicine and completed her internal medicine training at the University of Rochester and a fellowship in Oncology and Cancer Biology at Stanford University. We believe that Dr. Horning is qualified to serve on our Board of Directors due to her significant experience in the field of oncology and her product development leadership experience.