Effective July 30, 2021, the board of directors of Sensei Biotherapeutics, Inc. appointed Kristian Humer to serve as a director of the Company and as a member of the Company’s audit committee. Mr. Humer will serve as a Class II director whose term will expire at the 2023 annual meeting of stockholders. Kristian Humer has served as the Chief Financial Officer and Chief Business Officer of Viridian Therapeutics Inc. since July 2021.