Panbela Therapeutics, Inc. announced that company founder, Michael T. Cullen, MD, MBA, retired as an employee of the company, effective May 25, 2021. Dr. Cullen will continue to serve as a member of the Board of Directors and as its Chair. Most recently, Dr. Cullen was Executive Chairman of Panbela's Board of Directors. Dr. Cullen, a 33-year biopharmaceutical industry veteran, co-founded the company in 2011 and has continuously served as the Chairman of the Board of Directors, prior to moving into the Executive Chairman role in 2015.