TESARO, Inc. (TESARO) is a development-stage, oncology-focused biopharmaceutical company for cancer patients. The Company focuses on rolapitant and TSR-011 product. The Company�s marketed products and product candidates in development treat cancer through non-specific damage to cellular components or alter cell metabolism or internal repair mechanisms to the demise of cancer cells. Rolapitant is a potent and long-acting neurokinin-1, or NK-1, receptor antagonist is in Phase III clinical trials for the prevention of chemotherapy induced nausea and vomiting (CINV). TSR-011 is an orally available anaplastic lymphoma kinase (ALK), inhibitor (targeted anti-cancer agent) is in preclinical development.