On April 24, 2024, Jack B. Nielsen notified the Board of Directors of Instil Bio, Inc. (the Company) that he is resigning from the Company?s Board of Directors (Board) effective immediately for personal reasons. Mr. Nielsen?s decision is not due to any disagreement with the Company or the Board on any matter relating to the operations, policies or practices of the Company. In connection with Mr. Nielsen?s resignation, the Board appointed George Matcham, Ph.D., a member of the Board, to serve on the Audit Committee of the Board.