Gilead Sciences, Inc. (NASDAQ:GILD - Get Free Report) CEO Daniel Patrick O'day sold 15,000 shares of the business's stock in a transaction on Monday, June 1st. The stock was sold at an average price of $131.46, for a total value of $1,971,900.00. Following the completion of the transaction, the chief executive officer directly owned 617,567 shares of the company's stock, valued at approximately $81,185,357.82. This trade represents a 2.37% decre…