ImmunoGen, Inc. (ImmunoGen) is a clinical-stage biotechnology company focused on the development of targeted anticancer therapeutics. The Company's clinical and preclinical product candidates are antibody-drug conjugates (ADCs), which is a type of medicine that uses a monoclonal antibody to deliver a therapeutic agent to targeted cells. The Company has three clinical-stage anticancer compounds: mirvetuximab soravtansine (IMGN853), coltuximab ravtansine, IMGN529, and IMGN779. The Company's partners are Amgen Inc., Bayer HealthCare (a subgroup of Bayer AG), Biotest AG, Eli Lilly and Company (Lilly), Novartis Institutes for BioMedical Research, Inc. (Novartis), the Roche Group, Sanofi and Takeda. The Company's collaborative partner compounds include Kadcyla, Indatuximab ravtansine, Isatuximab, Anetumumab ravtansine, AMG 595, AMG 172, SAR566658, SAR408701, LOP628 and PCA062. All of the Company's compounds are ADCs with the exception of isatuximab, which is a therapeutic antibody.