Celyad Oncology SA is a clinical-stage biotechnology company, which focuses on the discovery and development of chimeric antigen receptor T cell (CAR T) therapies for cancer. It operates through the following segments: Cardiology and Immuno-Oncology. The Cardiology segment includes the company's Cardiopoiesis, Corquest, and C-Cathez platforms. The Immuno-Oncology segment consists of all assets developed based on the CAR-T cell platform. The company was founded by Michel Lussier, William Wijns, and Christian Homsy on July 24, 2007 and is headquartered in Mont-Saint-Guibert, Belgium.