TESARO, Inc. (TESARO) is oncology-focused biopharmaceutical company. The Company acquires, in-licenses and develops oncology product candidates. The Company has in-licensed and are developing three clinical-stage product candidates, rolapitant, niraparib and TSR-011. Rolapitant is a potent and long-acting neurokinin-1, or NK-1, receptor antagonist for the prevention of chemotherapy induced nausea and vomiting (CINV); Niraparib, formerly known as MK-4827, is an orally active and potent poly (ADP-ribose) polymerase, and TSR-011 is an orally available targeted anti-cancer agent which is a potent inhibitor of both anaplastic lymphoma kinase (ALK) and tropomyosin-related kinase (TRK). The Company is also developing immuno-oncology programs by entering into a collaboration and exclusive license agreement with AnaptysBio, Inc., for the discovery and development of antibodies for several specified immuno-oncology targets.