Gilead Sciences, Inc., a biopharmaceutical company, discovers, develops, and commercializes medicines in the areas of unmet medical need in the United States, Europe, and internationally. The company provides Biktarvy, Genvoya, Descovy, Odefsey, Truvada, Complera/ Eviplera, Stribild, and Atripla products for the treatment of HIV/AIDS; Veklury, an injection for intravenous use, for the treatment of coronavirus disease 2019; and Epclusa, Harvoni, Vosevi, Vemlidy, and Viread for the treatment of viral hepatitis. It also offers Yescarta, Tecartus, Trodelvy, and Zydelig products for the treatment of oncology; Letairis, an oral formulation for the treatment of pulmonary arterial hypertension; and AmBisome, a liposomal formulation for the treatment of serious invasive fungal infections. Gilead Sciences, Inc. has collaboration agreements with Arcus Biosciences, Inc.; Merck & Co, Inc.; Pionyr Immunotherapeutics Inc.; Tizona Therapeutics, Inc.; Tango Therapeutics, Inc.; Jounce Therapeutics, Inc.; Galapagos NV; Janssen Sciences Ireland Unlimited Company; Japan Tobacco, Inc.; Dragonfly Therapeutics, Inc.; Merck & Co, Inc. and Tentarix Biotherapeutics Inc. The company was incorporated in 1987 and is headquartered in Foster City, California.