Merck & Co., Inc. (NYSE:MRK - Get Free Report) EVP Chirfi Guindo sold 10,000 shares of Merck & Co., Inc. stock in a transaction that occurred on Thursday, August 13th. The shares were sold at an average price of $135.00, for a total value of $1,350,000.00. Following the completion of the transaction, the executive vice president owned 36,613 shares in the company, valued at $4,942,755. This trade represents a 21.45% decrease in their ownership o…