On January 26, 2021, the Board of Directors of Adaptive Biotechnologies Corporation appointed Mark Adams as Chief Operating Officer of the Company, effective January 25, 2021. Dr. Adams, 53, joined the Company in April 2020 as Chief Technical Officer. On January 21, 2021, the Company and Nancy Hill agreed that her tenure as Company's Executive Vice President, Operations and Program Management will be terminated, effective March 2, 2021. Ms. Hill's termination is not the result of any material disagreement with the Company regarding its operations, policies, or practices.