Gilead Sciences, Inc. is a biopharmaceutical company, which engages in the research, development, and commercialization of medicines in areas of unmet medical need. The company is headquartered in Foster City, California and currently employs 17,600 full-time employees. The company is engaged in advancing medicines to prevent and treat life-threatening diseases, including HIV, viral hepatitis, COVID-19, cancer, and inflammation. The company is focused on discovering, developing, and delivering medicines to address unmet medical needs in virology, oncology, and other therapeutic areas. Its portfolio of marketed products includes Biktarvy, Genvoya, Descovy, Complera/Eviplera, Symtuza, Truvada, Stribild, Sunlenca, Epclusa, Vemlidy, Harvoni, Viread, Livdelzi, Veklury, Yescarta, Tecartus, Trodelvy, AmBisome, and Letairis. Its product candidates include Bulevirtide, Lenacapavir, Axicabtagene ciloleucel, Sacituzumab govitecan-hziy, and others. The company also develops the HB-400 program and the HB-500 program. The company develops therapies that are intended to provide functional cures for hepatitis B virus and human immunodeficiency virus-1. The company has a cancer program, namely TREX1. The company operates in more than 35 countries worldwide.