Xilio is a Waltham, Massachusetts-based clinical-stage biopharmaceutical company focused on defeating cancer. The company’s proprietary technology enables the explosion of therapeutic activity specifically within the tumor while reducing toxicity throughout the body – a nod to the company name, Xilio, derived from the Latin term, Ex Nihilo, meaning creation or big-bang. Xilio is applying its technology to build a broad pipeline of engineered antibodies, cytokines and chemokines as potential new options for people living with cancer.