CoStar Group to acquire Apartments.com for $585 million By: Washington Business Journal via Business Journals March 03, 2014 at 09:59 AM EST Apartments.com can help you find a home. Now it has one of its own. D.C.-based CoStar Group Inc. (NASDAQ: CSGP) has agreed to acquire Apartments... Read More >> Related Stocks: Gannett Co SunTrust Banks