CoStar Group is a provider of information, analytics, online marketplace and auction services to the commercial real estate and related business community through its proprietary database of commercial real estate information and related tools. Co. provides online marketplaces for commercial real estate, apartment rentals, residential real estate, land for sale and businesses for sale, and its services are typically distributed to its clients under subscription-based agreements that typically renew automatically. Co. operates within two operating segments, North America, which includes the U.S. and Canada, and International, which primarily includes Europe, Asia-Pacific and Latin America.