CoStar Group, Inc. (NASDAQ:CSGP - Get Free Report) CEO Andrew Florance purchased 83,300 shares of the company's stock in a transaction dated Tuesday, August 4th. The stock was purchased at an average price of $29.89 per share, with a total value of $2,489,837.00. Following the transaction, the chief executive officer owned 1,806,165 shares of the company's stock, valued at approximately $53,986,271.85. This represents a 4.83% increase in their ownership of the stock. The acquisition was disclose