FOSTER CITY, Calif.--(BUSINESS WIRE)--Gilead Sciences, Inc. (Nasdaq:GILD) announced today that its Board of Directors has approved a two-for-one stock split of the company’s outstanding common stock to be effected through a stock dividend. Stockholders of record as of the close of business on January 7, 2013 will be entitled to a stock dividend of one additional share of common stock for every share of common stock they own. Based on the total number of shares of common stock outstanding as of November 30, 2012, the stock split will increase the total number of shares of common stock outstanding from approximately 759,335,932 to 1,518,671,864, out of the 2,800,000,000 shares of common stock currently authorized.