Insider Sell At Interactive Brokers Group, Inc. (IBKR): Milan Galik Sells 18,000 Shares Of Class A Common Stock, At a Price Of $ 22.92 Per Share.By Isabel RollandiJune 17, 2014 Interactive Brokers Group, Inc. (NASDAQ:IBKR)’s Svp Software Development Milan Galik recently sold 18,000 shares of Class A Common Stock, at an…