Charles Homcy, M.D. is our co-founder and has served as a member of our board of directors since June 2018, and previously served as chairman of our board of directors from June 2018 to October 2025. Dr. Homcy previously served as a partner at Third Rock Ventures, a venture capital firm, from September 2010 to October 2019 where he currently serves in an advisory capacity. Dr. Homcy is also a co-founder of BridgeBio Pharma, Inc., a publicly traded biotechnology company, and has served as a member of its board since 2018. Dr. Homcy co-founded Portola Pharmaceuticals, LLC, a clinical biotechnology company, and served as President and Chief Executive Officer until 2010. Prior to that, Dr. Homcy served as director and the President of Research and Development at Millennium Pharmaceuticals, Inc. He was previously President of the medical research division of American Cyanamid & Chemical Corporation s American Cyanamid-Lederle Laboratories. Dr. Homcy was a clinical professor of medicine at the University of California, San Francisco Medical School, and attending physician at the San Francisco Veterans Affairs Hospital from 1997 to 2008. He was previously a member of the Cardiac Unit of the Massachusetts General Hospital and an Associate Professor of Medicine at Harvard Medical School. Dr. Homcy holds an A.B. in Biology and an M.D. from Johns Hopkins University and is an Emeritus Trustee. Dr. Homcy is a co-founder of multiple privately held biotechnology companies including Global Blood Therapeutics, Inc., MyoKardia, Inc., Relay Therapeutics, Inc., Pliant Therapeutics Inc., and Marea Therapeutics. We believe Dr. Homcy is qualified to serve on our board of directors based on his significant experience building and leading successful biotechnology companies and his scientific expertise.