Teradyne, Inc. (NASDAQ:TER - Get Free Report) CEO Gregory Stephen Smith sold 4,000 shares of the firm's stock in a transaction dated Monday, June 15th. The stock was sold at an average price of $423.03, for a total transaction of $1,692,120.00. Following the completion of the sale, the chief executive officer directly owned 120,470 shares of the company's stock, valued at approximately $50,962,424.10. This represents a 3.21% decrease in their ow…