CoStar Group, Inc. (NASDAQ: CSGP) is the leading provider of commercial real estate information, analytics and online marketplaces. Founded in 1987, CoStar conducts expansive, ongoing research to produce and maintain the largest and most comprehensive database of commercial real estate information. Our suite of online services enables clients to analyze, interpret and gain unmatched insight on commercial property values, market conditions and current availabilities. LoopNet is the most heavily trafficked commercial real estate marketplace online with nearly 11 million registered members. Apartments.com, ApartmentFinder.com, ApartmentHomeLiving.com and Westside Rentals form the premier online apartment resource for renters seeking great apartment homes and provide property managers and owners a proven platform for marketing their properties. Through an exclusive partnership with Move, a subsidiary of News Corporation, Apartments.com is the exclusive provider of apartment community listings across Move's family of websites, which include realtor.com®, doorsteps.com and move.com. CoStar Group's websites attracted an average of over 33 million unique monthly visitors in aggregate in the first quarter of 2017. Headquartered in Washington, DC, CoStar maintains offices throughout the U.S. and in Europe and Canada with a staff of over 3,200 worldwide, including the industry's largest professional research organization. For more information, visit www.costargroup.com.