CoStar Group is one of the leading providers of information services to commercial real estate professionals in the United States and the United Kingdom. The firms suite of services offers customers access via the Internet to a database of commercial real estate information on more than 50 markets. Based in Bethesda, Md., the company has approximately 1,000 employees, making it one the largest professional research organizations in the industry. CoStar Group is a publicly traded company listed on the NASDAQ under the symbol CSGP.