CoStar Group, Inc. (CSGP)

CoStar Group Market Cap

CoStar Group has a market cap or net worth of $17.93 billion as of March 23, 2026. Its market cap has decreased by -43.13% in one year.

• Market Cap: 17.93B
• Enterprise Value: 17.52B
• 1-Year Change: -43.13%
• Ranking: #627
• Category: Large-Cap
• Stock Price: $42.70

Market Cap Chart

Since December 1, 1998, CoStar Group's market cap has increased from $74.60M to $17.93B, an increase of 23,928.38%. That is a compound annual growth rate of 22.22%.

Market Cap History

Date	Market Cap	% Change
Mar 20, 2026	18.01B	-36.81%
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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