On March 10, 2023, Dr. Felix Baker notified Talis Biomedical Corporation of his resignation from the Company's board of directors, effective as of March 10, 2023. Dr. Baker's resignation was not due to any disagreement with the Company on any matter related to the Company's operations, policies or practices. Also on March 10, 2023, Dr. Raymond Cheong was appointed to the Board to fill the BBI vacancy created by Dr. Baker's resignation and serve as a Class I Director with a term expiring at the Company's 2025 annual meeting of stockholders and until his successor is elected and qualified or his earlier resignation or removal.

Dr. Cheong was nominated to the Board by BBI pursuant to the Nominating Agreement and had served as the BBI Observer to the Board since June 2022. Dr. Cheong had previously served as a director of the Company from June 2020 until June 2022. Dr. Cheong is a Managing Director at Baker Bros.

Advisors LP, where he has worked since 2013. Dr. Cheong also serves on the board of directors of Istari Oncology Inc., a private biotechnology company focused on immuno-oncology and immunotherapy platforms, since December 2018. Dr. Cheong received a B.S. in Chemical Engineering from the University of Maryland, College Park, and an M.D. and a Ph.D. in Biomedical Engineering from Johns Hopkins University, where he was awarded the Michael A. Shanoff Award for best thesis research.