CoStar Group (CSGP) - Market capitalization

Market cap: A$43.45 Billion

As of December 2025 CoStar Group has a market cap of A$43.45 Billion. This makes CoStar Group the world's 810th 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 2025

End of year Market Cap

Year	Marketcap	Change
2025	A$43.45 B	-8.71%
2024	A$47.60 B	-9.13%
2023	A$52.38 B	13.41%
2022	A$46.18 B	7.28%
2021	A$43.05 B	-9.14%
2020	A$47.38 B	51.21%
2019	A$31.33 B	79.54%
2018	A$17.45 B	26.94%
2017	A$13.74 B	61.31%
2016	A$8.52 B	-7.6%
2015	A$9.22 B	27.2%
2014	A$7.25 B	21.47%
2013	A$5.96 B	144.87%
2012	A$2.43 B	47.85%
2011	A$1.64 B	40.16%
2010	A$1.17 B	22.72%
2009	A$0.95 B	4.05%
2008	A$0.92 B	-12.46%
2007	A$1.05 B	-18.82%
2006	A$1.29 B	17.67%
2005	A$1.10 B	0.87%
2004	A$1.09 B	8.91%
2003	A$1.00 B	93.71%
2002	A$0.51 B	-29.98%
2001	A$0.73 B	12.58%
2000	A$0.65 B	-7.21%
1999	A$0.70 B	291.45%
1998	A$0.18 B

End of Day market cap according to different sources

On Dec 13th, 2025 the market cap of CoStar Group was reported to be:

A$43.45 Billion

by Nasdaq

A$43.45 Billion

by CompaniesMarketCap

Market capitalization for similar companies or competitors

Name	Marketcap	Market cap differencediff.	Country
TechTarget TTGT	A$0.59 B	-98.62%	🇺🇸 USA
Movano MOVE	A$11.81 M	-99.97%	🇺🇸 USA
Accenture ACN	A$254.16 B	484.91%	🇮🇪 Ireland
Magellan Health MGLN	A$3.75 B	-91.35%	🇺🇸 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: A$43.45 Billion