Verastem, Inc., a clinical stage biopharmaceutical company, focuses on discovering and developing drugs to improve outcomes for patients with cancer. Its programs target the focal adhesion kinase (FAK) and the phosphoinositide 3-kinase (PI3K)/mTOR signaling pathways. Its lead FAK inhibitor is defactinib (VS-6063), an orally available candidate for combination therapy with immuno-oncology agents and other anti-cancer compounds. The company's defactinib is in Phase 1b study for the treatment of pancreatic cancer, as well as in Phase 1/2 clinical trial for the treatment of ovarian cancer, non-small cell lung cancer, mesothelioma, and pancreatic cancer. It also engages in developing duvelisib, an investigational oral therapy that targets the PI3K signaling pathway, as well as attacks malignant B-cells and T-cells and disrupt the tumor microenvironment to help thwart their growth and proliferation for patients with lymphatic cancers through the dual inhibition of PI3K delta and gamma.