Athersys, Inc., a biotechnology company, focuses on the research and development activities in the field of regenerative medicine. Its clinical development programs are focused on treating neurological conditions, cardiovascular diseases, inflammatory and immune disorders, and pulmonary and other conditions. The company's lead platform product includes MultiStem cell therapy, an allogeneic stem cell product for the treatment of patients suffering from neurological damage from an ischemic stroke, as well as for acute respiratory distress syndrome, trauma complications, HSC transplant support, and other indications. It also develops MultiStem cell therapy to promote tissue repair and healing for animal patients. The company has license and collaboration agreements with Healios K.K. to develop and commercialize MultiStem cell therapy for ischemic stroke, acute respiratory distress syndrome, and ophthalmological indications, as well as for the treatment of liver, kidney, pancreas, and intestinal tissue diseases; and the University of Minnesota to develop MultiStem cell therapy platform. The company was founded in 1995 and is headquartered in Cleveland, Ohio. On September 24, 2024, the voluntary petition of Athersys, Inc. for reorganization under Chapter 11 was converted to Chapter 7. It had filed for Chapter 11 bankruptcy along with its affiliates on January 5, 2024.