CoStar Group (CSGP) - Market capitalization

Market cap: €12.08 Billion

As of May 2026 CoStar Group has a market cap of €12.08 Billion. This makes CoStar Group the world's 1546th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.

Market cap history of CoStar Group from 1998 to 2026

End of year Market Cap

Year	Marketcap	Change
2026	€12.08 B	-50.01%
2025	€24.17 B	-15.03%
2024	€28.45 B	-11.87%
2023	€32.28 B	10.18%
2022	€29.29 B	6.31%
2021	€27.55 B	-6.96%
2020	€29.62 B	51.25%
2019	€19.58 B	82.22%
2018	€10.74 B	20.14%
2017	€8.94 B	53.16%
2016	€5.84 B	-4.96%
2015	€6.14 B	25.94%
2014	€4.87 B	26.55%
2013	€3.85 B	101.31%
2012	€1.91 B	47.11%
2011	€1.30 B	44.91%
2010	€0.89 B	49.47%
2009	€0.60 B	29.27%
2008	€0.46 B	-26.22%
2007	€0.63 B	-18.63%
2006	€0.77 B	13.81%
2005	€0.68 B	9.22%
2004	€0.62 B	5.23%
2003	€0.59 B	112.2%
2002	€0.27 B	-34.7%
2001	€0.42 B	9.61%
2000	€0.38 B	-15.67%
1999	€0.46 B	395.41%
1998	€93.31 M

End of Day market cap according to different sources

On May 1st, 2026 the market cap of CoStar Group was reported to be:

€12.08 Billion

by Nasdaq

€12.08 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
Accenture ACN	€94.33 B	680.60%	🇮🇪 Ireland
TechTarget TTGT	€0.35 B	-97.06%	🇺🇸 USA
Magellan Health MGLN	€2.13 B	-82.36%	🇺🇸 USA
Movano MOVE	€13.45 M	-99.89%	🇺🇸 USA

What is the market capitalization of a company?

The market capitalization sometimes referred as Marketcap, is the value of a publicly listed company.
In most cases it can be easily calculated by multiplying the share price with the amount of outstanding shares.

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Market capitalization of CoStar Group (CSGP)

Market cap: €12.08 Billion