CoStar Group Market Cap

CoStar Group has a market cap or net worth of $12.89 billion as of November 5, 2026. It is the 1,727th most valuable company in the world and the 639th biggest in the United States. Its market cap has decreased by 56.40% in one year.

Market Cap

12.89B

Enterprise Value

13.57B

1-Year Change

-56.40%

Global Rank

#1,727

Country Rank

#639 United States

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Since December 1, 1998, CoStar Group's market cap has increased from $74.60M to $12.89B, an increase of 17,185.40%. That is a compound annual growth rate of 20.24%.

Market Cap History

Date	Market Cap	% Change
Nov 5, 2026	12.89B	-54.75%
Dec 31, 2025	28.50B	-2.90%
Dec 31, 2024	29.35B	-17.76%
Dec 29, 2023	35.69B	13.55%
Dec 30, 2022	31.43B	0.70%
Dec 31, 2021	31.21B	-14.33%
Dec 31, 2020	36.43B	66.22%
Dec 31, 2019	21.92B	78.41%
Dec 31, 2018	12.29B	14.46%
Dec 29, 2017	10.73B	74.71%
Dec 30, 2016	6.14B	-8.51%
Dec 31, 2015	6.72B	13.04%
Dec 31, 2014	5.94B	11.92%
Dec 31, 2013	5.31B	110.16%
Dec 31, 2012	2.53B	49.38%
Dec 30, 2011	1.69B	41.59%
Dec 31, 2010	1.19B	38.96%
Dec 31, 2009	859.30M	32.20%
Dec 31, 2008	650.00M	-28.67%
Dec 31, 2007	911.30M	-10.14%
Dec 29, 2006	1.01B	26.18%
Dec 30, 2005	803.70M	-4.89%
Dec 31, 2004	845.00M	15.25%
Dec 31, 2003	733.20M	151.61%
Dec 31, 2002	291.40M	-22.66%

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Market Capitalization

Market capitalization, also called net worth, is the total value of all of a company's outstanding shares. It is calculated by multiplying the stock price by the number of shares outstanding.

Formula: Market Cap = Stock Price * Shares Outstanding

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