Current
$12.1B
5-Year Average
$29.7B
All-Time High
$41.1B
All-Time Low
$250M
Market cap daily chart for CoStar Group (CSGP)
Aug 2, 2021 – Jul 29, 2026 · 1,253 trading days
Market Cap growth chart for CoStar Group (CSGP) from 2017 to 2026
Latest: -57.4%
Market Cap history table for CoStar Group (CSGP) from 1998 to 2026
| 2026 | $12.1B | -57.4% | -$16.2B | ||
| 2025 | $28.3B | -3.1% | -$907M | ||
| 2024 | $29.2B | -17.9% | -$6.36B | ||
| 2023 | $35.6B | +15.7% | +$4.82B | ||
| 2022 | $30.7B | -1.3% | -$412M | ||
| 2021 | $31.2B | -12.1% | -$4.27B | ||
| 2020 | $35.4B | +61.6% | +$13.5B | ||
| 2019 | $21.9B | +78.3% | +$9.62B | ||
| 2018 | $12.3B | +23.3% | +$2.33B | ||
| 2017 | $9.97B | +63.0% | +$3.85B | ||
| 2016 | $6.11B | -7.4% | -$490M | ||
| 2015 | $6.6B | +17.4% | +$978M | ||
| 2014 | $5.63B | +8.0% | +$418M | ||
| 2013 | $5.21B | +116.2% | +$2.8B | ||
| 2012 | $2.41B | +53.5% | +$840M | ||
| 2011 | $1.57B | +31.6% | +$377M | ||
| 2010 | $1.19B | +43.2% | +$360M | ||
| 2009 | $833M | +29.5% | +$190M | ||
| 2008 | $643M | -29.8% | -$273M | ||
| 2007 | $916M | -10.8% | -$111M | ||
| 2006 | $1.03B | +25.1% | +$206M | ||
| 2005 | $821M | -5.6% | -$48.7M | ||
| 2004 | $870M | +25.1% | +$175M | ||
| 2003 | $695M | +138.5% | +$404M | ||
| 2002 | $292M | -22.3% | -$83.7M | ||
| 2001 | $375M | +5.0% | +$18M | ||
| 2000 | $357M | -15.1% | -$63.8M | ||
| 1999 | $421M | +363.2% | +$330M | ||
| 1998 | $90.9M | — | — |
- 2026$12.1B-57.4%
- 2025$28.3B-3.1%
- 2024$29.2B-17.9%
- 2023$35.6B+15.7%
- 2022$30.7B-1.3%
- 2021$31.2B-12.1%
- 2020$35.4B+61.6%
- 2019$21.9B+78.3%
- 2018$12.3B+23.3%
- 2017$9.97B+63.0%
- 2016$6.11B-7.4%
- 2015$6.6B+17.4%
- 2014$5.63B+8.0%
- 2013$5.21B+116.2%
- 2012$2.41B+53.5%
- 2011$1.57B+31.6%
- 2010$1.19B+43.2%
- 2009$833M+29.5%
- 2008$643M-29.8%
- 2007$916M-10.8%
- 2006$1.03B+25.1%
- 2005$821M-5.6%
- 2004$870M+25.1%
- 2003$695M+138.5%
- 2002$292M-22.3%
- 2001$375M+5.0%
- 2000$357M-15.1%
- 1999$421M+363.2%
- 1998$90.9M—
Market Cap values are taken from CoStar Group's reported income statements (share counts) and end-of-day prices (quarterly 10-Q and annual 10-K filings with the U.S. Securities and Exchange Commission). Each row shows the period end date and the filing date. YoY compares each figure to the same period one year earlier. Amounts are in USD as filed.
About Market Cap at CoStar Group (CSGP)
According to CoStar Group's latest reported financial statements, the company's latest reported market cap is $11.5B. Market capitalization is the total dollar value of all outstanding shares — shares outstanding × stock price — and the standard measure of a company's equity value. On this page, historical market cap snaps filing-period share counts to closing prices on or before each statement date (not intraday tick data).
Headline figure above is from the reporting period ending (reported ). Chart and table below cover the full reported history back to .
As of the 2026 fiscal year, CoStar Group (CSGP) reported market cap of $12.1B – plunged 57.4% year-over-year.
Looking at the 2021–2026 (5 years) stretch, CoStar Group market cap compounded at -17.3% per year, with a net decline across the window.
CoStar Group market cap peaked at $35.6B in 2023; the latest annual figure is $12.1B in 2026 (66.1% below peak).
$35.6B stands as the all-time-high annual market cap, posted in 2023, against a low of $90.9M during 1998.
CoStar Group Market Cap by Year
CoStar Group Market Cap 2026: $12.1B
CoStar Group market cap in 2026 was $12.1B, plunged 57.4% below 2025.
CoStar Group Market Cap 2025: $28.3B
2025's market cap for CoStar Group came in at $28.3B, edged down 3.1% below 2024.
CoStar Group Market Cap 2024: $29.2B
CoStar Group posted market cap of $29.2B in 2024, declined 17.9% below 2023.
CoStar Group Market Cap 2023: $35.6B
In 2023, CoStar Group reported market cap of $35.6B, grew 15.7% from 2022. This figure represents the highest annual value in the available history.
CoStar Group Market Cap 2022: $30.7B
CoStar Group market cap in 2022 was $30.7B.
See more financial history for CoStar Group (CSGP).
Sector peers by Market Cap
Real Estate peers of CoStar Group (CSGP), ranked by their latest market cap
| $170B | |
| $136B | |
| $99.4B | |
| $83.5B | |
| $76.4B | |
| $69.6B | |
| $61.4B | |
| $61.1B |
- $170B
- $136B
- $99.4B
- $83.5B
- $61.4B
- $61.1B
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CoStar Group (CSGP) Key Financials
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