On December 29, 2021, Leonard J. LeBlanc, a member of the Board of Directors of AXT, Inc. (the Company) since April 2003 and a Class III director, notified the Board of his decision to resign from the Board and all committees thereof, effective as of December 29, 2021. Mr. LeBlanc will become a director emeritus, effective as of December 29, 2021. Effective as of Mr. LeBlanc's resignation from the Board and all committees thereof, the Board appointed Christine Russell as chair of the Audit Committee of the Board and Jesse Chen as chair of the Nominating and Corporate Governance Committee of the Board.