On June 3, 2022, Guy Levy informed BioAtla, Inc. of his decision to resign from the Company's Board of Directors, effective June 16, 2022, the date of the Company's 2022 Annual Meeting of Shareholders. The Company expresses its appreciation to Mr. Levy for his distinguished service on the Board of Directors. Mr. Levy's decision is not due to any disagreement with the Company or the Board of Directors on any matter relating to the Company's operations, policies or practices.