ImmunoGen, Inc. (ImmunoGen) develops targeted, antibody-based therapeutics for the treatment of cancer. ImmunoGen designs linkers that enable antibody-based therapeutics for the treatment of cancer agents to remain stably attached to the antibodies while in the blood stream and be released in their fully active form after delivery to a cancer cell. An anticancer compound made using the Company�s Targeted Antibody Payload (TAP), technology consists of a monoclonal antibody. The Company's TAP technology is designed to enable the creation of well-tolerated anticancer products. As of June 30, 2012, ImmunoGen had three wholly owned clinical-stage product candidates included IMGN901, IMGN853, and IMGN529, and other TAP compounds in earlier stages of development.