FOSTER CITY, Calif.--(BUSINESS WIRE)--Gilead Sciences, Inc. (Nasdaq:GILD) today announced the establishment of a new stock trading plan under Rule 10b5-1 of the Securities Exchange Act of 1934 on May 22, 2008 by John C. Martin, PhD, Chairman and Chief Executive Officer of Gilead. Commencing in September 2008, Dr. Martin’s plan provides for the exercise and sale of certain options each month on pre-determined dates through July 2010.