CoStar Group, Inc. is a real estate technology and data company that provides information, analytics, and online marketplace services for commercial and residential property markets globally. The company offers an integrated suite of data products covering property inventory, lease and sales transactions, ownership details, tenant information, and market analytics across sectors such as office, retail, industrial, multifamily, hospitality, healthcare, and land. CoStar Group operates well-known digital marketplaces and brands including CoStar, LoopNet, Apartments.com, Homes.com, Ten-X, Land.com, and BizBuySell, connecting brokers, investors, landlords, buyers, and renters. Its platforms are widely used for research, marketing, listing exposure, deal execution, and performance benchmarking, including specialized tools for hotel benchmarking and real estate debt portfolio management. Headquartered in Arlington, Virginia and founded in the United States, CoStar Group plays a central role in digitizing real estate workflows and providing data-driven insights to participants across North America, Europe, the Asia-Pacific region, and Latin America.