CoStar Group, Inc. (CSGP)
NASDAQ: CSGP · Real-Time Price · USD
33.92
-1.53 (-4.32%)
At close: Oct 23, 2026, 4:00 PM EDT
33.86
-0.06 (-0.19%)
After-hours: Oct 23, 2026, 7:54 PM EDT
CoStar Group Market Cap
CoStar Group has a market cap or net worth of $13.74 billion as of October 23, 2026. It is the 1,640th most valuable company in the world and the 615th biggest in the United States. Its market cap has decreased by 57.97% in one year.
Market Cap
13.74B
Enterprise Value
13.63B
1-Year Change
-57.97%
Global Rank
Country Rank
#615 United States
Category
ChartMarket Cap Chart
Since December 1, 1998, CoStar Group's market cap has increased from $74.60M to $13.74B, an increase of 18,324.00%. That is a compound annual growth rate of 20.55%.
| Date | Market Cap | % Change |
|---|---|---|
| Oct 23, 2026 | 13.74B | -51.77% |
| 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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