 CAMBRIDGE, Mass., May 21, 2021 GLOBE NEWSWIRE -- Cullinan Oncology, Inc. Nasdaq: CGEM Cullinan, an oncology company seeking to drive shareholder returns by focusing on the patient, today announced that Jon Wigginton, M.D. is stepping down from his day-to-day role as Chief Medical Officer, and will assume the role of Chairman of the companys Scientific Advisory Board SAB and Senior Advisor to the CEO. 