On September 18, 2018, the Board of Directors of CTI BioPharma Corp. accepted Dr. Telling's resignation from the Board, effective immediately after the next regularly scheduled Board meeting, which is scheduled to occur on December 13, 2018 (the Resignation Date"). Additionally, the Board accepted Dr. Telling's resignation from the Nominating and Governance Committee of the Board (the Nominating Committee"), effective immediately. Dr. Telling will also step down from his role as Chairman of the Audit Committee of the Board (the Audit Committee"), and will continue to serve as a member of the Audit Committee until the earlier of the Resignation Date or the appointment of Dr. Telling's replacement by the Board. Director Michael Metzger will assume the role as Audit Committee Chairman.