Founded in 1987 in Foster City, California, Gilead Sciences, Inc. is a research-based biopharmaceutical company focused on discovering, developing, and commercializing innovative medicines for serious diseases. Headquartered in Foster City, the company has established a leading position in virology, oncology, and inflammation, supported by a broad portfolio of more than 25 medicines and a pipeline of 53 clinical programs. As of December 31, 2025, Gilead employed approximately 17,000 people worldwide and reported full-year revenue of $29.4 billion, reflecting the scale and durability of one of the biotechnology sector’s most established innovation platforms.
Updated 2026-03-19