Gilead Sciences, Inc. (NASDAQ:GILD – Get Free Report) CEO Daniel Patrick O’day sold 10,000 shares of the stock in a transaction on Wednesday, January 28th. Daniel Patrick O’day also recently made the following trade(s):Get Gilead Sciences alerts:On Friday, January 23rd, Daniel Patrick O’day sold 115,640 shares of Gilead Sciences stock. On Monday, December 29th, Daniel Patrick O’day sold 10,000 shares of Gilead Sciences stock. Gilead Sciences Stock PerformanceGILD stock traded down $0.17 during midday trading on Thursday, reaching $139.55. Further ReadingReceive News & Ratings for Gilead Sciences Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for Gilead Sciences and related companies with MarketBeat.com's FREE daily email newsletter.