Effective September 29, 2021, the board of directors of bluebird bio, Inc. appointed Sarah Glickman to the Board as a Class II director and Najoh Tita-Reid to the Board as a Class III director, and increased the size of the board to eleven. Ms. Tita-Reid has been appointed as a member of the Nominating and Corporate Governance Committee and the Compensation Committee of the Board, effective upon the consummation of the planned separation of the Company's oncology programs and portfolio from its severe genetic disease programs and portfolio through the spinoff of 2seventy bio, Inc. as an independent, publicly-traded Delaware corporation (the Separation). Glickman has not been appointed to any committees of the Board. Since September 2020, Sarah Glickman has served as the Chief Financial Officer for Criteo. Since April 2021, Najoh Tita-Reid has served as Global Chief Marketing Officer for Logitech.