On March 15, 2019, Dr. Raymond Urbanski resigned his positions as a director and officer of GT Biopharma, Inc. including without limitation Chairman of the Board of Directors and Chief Executive Officer. On the same day, Anthony Cataldo was appointed Chief Executive Officer and President of the Company and Chairman of the Board of Directors. Mr. Cataldo has extensive experience with the Company, having served on the Board of Directors from July 2014 until November 2018 and from January 7, 2019 until the present.

He also served as Chief Executive Officer from November 2014 to September 2017 and Executive Chairman of the Board from September 2017 to February 2018.