Gilead Sciences is a Foster City-based biopharmaceutical company and corporate strategic investor backing life-sciences innovation, with a focus on biotechnology, pharmaceuticals, oncology, virology and inflammation. It invests directly in venture-stage therapeutics, vaccine, immunotherapy and cancer-therapy companies, including later-stage VC and Series B rounds, and supports research and collaboration programs tied to U.S. science and manufacturing. The firm is most relevant for founders in the United States or United Kingdom seeking strategic life-sciences capital with pharmaceutical R&D and clinical-development relevance.