Tranche Update on Gilead Sciences, Inc.'s Equity Buyback Plan announced on February 25, 2020.

Gilead Sciences, Inc. specializes in the development, manufacturing and marketing of therapeutic products. Net sales break down by source of income as follows: - sale of drugs (98.9%): for the treatment of HIV (63% of net sales), COVID-19 (20.4%), hepatitis C virus (6.6%), hepatitis B virus (3.6%) and other (6.4%; primarily cytomegalovirus retinitis, and advanced Kaposi sarcoma resulting from HIV); - other (1.1%): especially royalties and revenue from research and development services and from subcontracted production of therapeutic products. Net sales are distributed geographically as follows: the United States (69.2%), Europe (16.4%) and other (14.4%).