CoStar Group, Inc

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Company Description

CoStar Group, Inc.
Public company
Traded as
  • NASDAQ-100 component
Industry Technology, Commercial property
Founded 1987; 33 years ago (1987)
Founder Andrew Florance
Headquarters Washington, D.C., U.S.
Area served
United States, Canada, United Kingdom, France, Germany, Spain
Key people
Andrew C. Florance, President (corporate title)
Revenue Increase $1.2 billion (2018)
Net income
Increase $238 million (2018)
Total assets Increase $3.313 billion (2018)
Total equity Increase $3.022 billion (2018)
Number of employees
3,705 (2018)

CoStar Group is a provider of information, analytics and marketing services to the commercial property industry in the United States, Canada, the United Kingdom, France, Germany, and Spain. Founded in 1987 by Andrew Florance, the company has grown to include many online marketplaces, including, LoopNet, and BizBuySell.


CoStar Group was founded in 1987 by Andrew Florance in Washington, D.C.

In 1998, the company became a public company via an initial public offering on the NASDAQ, raising $22.5 million.

In 2004, CoStar Group, Inc. v. LoopNet, Inc. became a landmark case in copyright law.

In October 2009, the company acquired a building in Washington, D.C., now its headquarters, from the Mortgage Bankers Association for $41.3 million. The building had sold 2 years earlier for $79 million and the company claims it used its analytics data to know the right time to buy.

In April 2012, CoStar Group acquired LoopNet for $860 million.

In April 2014, the company acquired for $585 million.

In April 2015, the company acquired Apartment Finder for $170 million.

In July 2015, the company acquired Belbex an online marketplace and information provider for commercial property based in Spain.

In February 2017, the company acquired Westside Rentals.

In February 2018, the company acquired from Dominion Enterprises for $350 million in cash and $35 million in stock.

In October 2018, the company acquired an online marketplace for commercial property based in the United Kingdom.

In November 2018, the company acquired Cozy Services for $68 million.

In February 2019, the company announced that Oxford Economics will provide the economic data and forecasts used in CoStar’s products.

In June 2019, it was announced that CoStar Group would acquire Off Campus Partners, LLC, the leading online marketplace for off campus student housing.

In October 2019, it was announced that CoStar Group would acquire STR, Inc, a global leader in hospitality data analytics, for $450 million.


    • Official website
    • Business data for CoStar Group:
      • Google Finance
      • Yahoo! Finance
      • Bloomberg
      • Reuters
      • SEC filings

    Category:Real estate companies established in 1987 Category:1987 establishments in Washington, D.C. Category:Companies based in Washington, D.C. Category:Real estate services companies of the United States Category:1998 initial public offerings