The NASDAQ OMX Group , Inc. is the world 's largest exchange company . It delivers trading , exchange technology and public company services across six continents , with over 3,900 listed companies . NASDAQ OMX Group offers multiple raising solutions to companies around the globe , including its U.S. listings market ; the OMX Nordic Exchange , including First North ; and the U.S. 144A sector . The company offers trading across multiple asset classes including equities , derivatives , debt , commodities , structured products and ETFs . NASDAQ OMX Group technology supports the operations of over 70 exchanges , clearing organizations and central securities depositories in more than 50 countries .