FOSTER CITY, Calif.--(BUSINESS WIRE)--Gilead Sciences, Inc. (Nasdaq:GILD) today announced the establishment of a stock trading plan under Rule 10b5-1 of the Securities Exchange Act of 1934 on May 16, 2007 by John F. Milligan, PhD, Chief Operating Officer and Chief Financial Officer of Gilead Sciences. Commencing in June 2007, Dr. Milligan’s plan provides for the exercise and sale of up to 30,000 stock options each quarter on pre-determined dates through December 2009.