 WASHINGTON--BUSINESS WIRE--CoStar Group, Inc. NASDAQ: CSGP, the leading provider of commercial real estate information, analytics and online marketplaces, today announced it ranked 29th on Fortune Magazines annual list of the 100 Fastest-Growing Companies. The prestigious designation recognizes the worlds best three-year performers in revenues, profits and stock returns. To receive this coveted distinction in a year where an unprecedented pandemic sent shockwaves through the global econo 