CoStar
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CoStar Group, Inc. (NASDAQ: CSGP) is the leading provider of information services to commercial real estate professionals in the United States and the United Kingdom. CoStar's suite of services offers customers access via the Internet to the most comprehensive database of commercial real estate information on 66 U.S. markets and the United Kingdom. Based in Bethesda, MD, the Company has approximately 1,000 employees throughout the United States and the United Kingdom, including the largest professional research organization in the industry.
CoStar was founded in 1987 by Andrew C. Florance and became a publicly traded company in 1998.