ImmunoGen, Inc. engages in the research and development of antibody-based anticancer therapeutics in the United States. The company develops therapeutics for the treatment of cancer using its Targeted Antibody Payload (TAP) technology, which uses antibodies to deliver a potent cytotoxic agent. Its products include Trastuzumab-DM1, a Phase II clinical trial product for the treatment of metastatic breast cancer; IMGN901, a Phase I clinical trial product to treat hematological malignancies, including multiple myeloma, small-cell lung cancer, Merkel cell carcinoma, and other cancers of neuroendocrine origin; SAR3419, a Phase I clinical trial product for the treatment of B-cell hematological malignancies, including non-Hodgkin's lymphoma; and IMGN388 and BIIB015, which are in Phase I clinical trials for the treatment of solid tumors. The company's products also comprise BT-062, a Phase I clinical trial product targeting multiple myeloma; SAR566658, a preclinical trail product for the treatment of breast, ovarian, and other solid tumors; SAR650984, a preclinical trail product to treat hematological malignancies; and TAP and other compounds. It has licensing or collaboration agreements with sanofi-aventis; Genentech, Inc.; Biotest AG; Bayer HealthCare AG; Biogen Idec; Amgen, Inc.; Centocor, Inc.; Cytovance Biologics LLC; Laureate Pharma, Inc.; BioInvent International AB; Diosynth RTP, Inc.; and Societa Italiana Corticosteroidi S.r.l. ImmunoGen was founded in 1981 and is headquartered in Waltham, Massachusetts.