What is CoStar Group's market cap?

CoStar Group (CSGP) has a market capitalization of $13.60B as of June 12, 2026. Market cap is the total market value of the company's outstanding shares (share price × shares outstanding), shown here in US dollars (USD).

How is CoStar Group's market cap calculated, and what currency is it in?

Market capitalization is calculated by multiplying CoStar Group's share price by its total shares outstanding. Although CoStar Group reports its financial statements in USD, market cap on this page is shown in US dollars (USD) for comparability with other companies.

What is the highest market cap CoStar Group has reached?

CoStar Group (CSGP) reached its all-time high market cap of $41.08B on August 4, 2025, based on daily closing values in our history.

What is the lowest market cap CoStar Group has reached?

CoStar Group (CSGP) recorded its all-time low market cap of $250.30M on October 30, 2002 in the available daily history.

Is CoStar Group's market cap above or below its 5-year average?

At $13.60B, CoStar Group's market cap is currently below its five-year average of $30.25B.

What was CoStar Group's market cap in 2025?

CoStar Group (CSGP) ended 2025 with a market cap of $28.29B.

What was CoStar Group's market cap in 2026?

CoStar Group (CSGP) ended 2026 with a market cap of $13.60B.

CoStar Group (CSGP) Market Cap History

Current

$13.60B

As of Jun 12, 2026

5-Year Average

$30.25B

All-Time High

$41.08B

Aug 4, 2025

All-Time Low

$250.30M

Oct 30, 2002

Market cap daily chart for CoStar Group (CSGP)

Jun 16, 2021 – Jun 12, 2026 · 1,254 trading days

Market Cap growth chart for CoStar Group (CSGP) from 1998 to 2026

Latest: -51.9%

Market Cap history table for CoStar Group (CSGP) from 1998 to 2026


2026	$13.60B	-51.9%	−$14.69B	Jun 12, 2026	Apr 29, 2026
2025	$28.29B	-3.1%	−$906.53M	Dec 31, 2025	Feb 24, 2026
2024	$29.19B	-17.9%	−$6.36B	Dec 31, 2024	Feb 20, 2025
2023	$35.56B	+15.7%	+$4.82B	Dec 31, 2023	Feb 22, 2024
2022	$30.74B	-1.3%	−$412.19M	Dec 31, 2022	Feb 22, 2023
2021	$31.15B	-12.1%	−$4.27B	Dec 31, 2021	Feb 23, 2022
2020	$35.42B	+61.6%	+$13.51B	Dec 31, 2020	Feb 24, 2021
2019	$21.92B	+78.3%	+$9.62B	Dec 31, 2019	Feb 26, 2020
2018	$12.29B	+23.3%	+$2.33B	Dec 31, 2018	Feb 28, 2019
2017	$9.97B	+63.0%	+$3.85B	Dec 31, 2017	Feb 23, 2018
2016	$6.11B	-7.4%	−$489.88M	Dec 31, 2016	Feb 24, 2017
2015	$6.60B	+17.4%	+$978.38M	Dec 31, 2015	Feb 26, 2016
2014	$5.63B	+8.0%	+$417.75M	Dec 31, 2014	Feb 26, 2015
2013	$5.21B	+116.2%	+$2.80B	Dec 31, 2013	Feb 20, 2014
2012	$2.41B	+53.5%	+$839.99M	Dec 31, 2012	Mar 1, 2013
2011	$1.57B	+31.6%	+$376.53M	Dec 31, 2011	Feb 23, 2012
2010	$1.19B	+43.2%	+$359.86M	Dec 31, 2010	Feb 25, 2011
2009	$832.87M	+29.5%	+$189.67M	Dec 31, 2009	Feb 26, 2010
2008	$643.20M	-29.8%	−$272.67M	Dec 31, 2008	Feb 24, 2009
2007	$915.87M	-10.8%	−$111.38M	Dec 31, 2007	Feb 29, 2008
2006	$1.03B	+25.1%	+$206.14M	Dec 31, 2006	Feb 28, 2007
2005	$821.10M	-5.6%	−$48.70M	Dec 31, 2005	Mar 7, 2006
2004	$869.81M	+25.1%	+$174.50M	Dec 31, 2004	Mar 11, 2005
2003	$695.31M	+138.5%	+$403.76M	Dec 31, 2003	Mar 12, 2004
2002	$291.54M	-22.3%	−$83.72M	Dec 31, 2002	Oct 15, 2003
2001	$375.26M	+5.0%	+$18.03M	Dec 31, 2001	Mar 28, 2002
2000	$357.23M	-15.1%	−$63.75M	Dec 31, 2000	Mar 30, 2001
1999	$420.98M	+363.2%	+$330.10M	Dec 31, 1999	Mar 29, 2000
1998	$90.88M	—	—	Dec 31, 1998	Mar 31, 1999

2026$13.60B-51.9%
2025$28.29B-3.1%
2024$29.19B-17.9%
2023$35.56B+15.7%
2022$30.74B-1.3%
2021$31.15B-12.1%
2020$35.42B+61.6%
2019$21.92B+78.3%
2018$12.29B+23.3%
2017$9.97B+63.0%
2016$6.11B-7.4%
2015$6.60B+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$832.87M+29.5%
2008$643.20M-29.8%
2007$915.87M-10.8%
2006$1.03B+25.1%
2005$821.10M-5.6%
2004$869.81M+25.1%
2003$695.31M+138.5%
2002$291.54M-22.3%
2001$375.26M+5.0%
2000$357.23M-15.1%
1999$420.98M+363.2%
1998$90.88M—

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 $16.70B. 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 March 31, 2026 (reported April 29, 2026). Chart and table below cover the full reported history back to 1998.

As of the 2026 fiscal year, CoStar Group (CSGP) reported market cap of $13.60B – plunged 51.9% year-over-year.

Looking at the 2021–2026 (5 years) stretch, CoStar Group market cap compounded at -15.3% per year, with a net decline across the window.

CoStar Group market cap peaked at $35.56B in 2023; the latest annual figure is $13.60B in 2026 (61.8% below peak).

$35.56B stands as the all-time-high annual market cap, posted in 2023, against a low of $90.88M during 1998.

CoStar Group Market Cap by Year

CoStar Group Market Cap 2026: $13.60B

CoStar Group market cap in 2026 was $13.60B, plunged 51.9% below 2025.

CoStar Group Market Cap 2025: $28.29B

2025's market cap for CoStar Group came in at $28.29B, edged down 3.1% below 2024.

CoStar Group Market Cap 2024: $29.19B

CoStar Group posted market cap of $29.19B in 2024, declined 17.9% below 2023.

CoStar Group Market Cap 2023: $35.56B

In 2023, CoStar Group reported market cap of $35.56B, grew 15.7% from 2022. This figure represents the highest annual value in the available history.

CoStar Group Market Cap 2022: $30.74B

CoStar Group market cap in 2022 was $30.74B.

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


Welltower (WELL)	$151.23B
Prologis (PLD)	$138.68B
Equinix (EQIX)	$104.13B
American Tower (AMT)	$87.21B
Simon Property Group (SPG)	$71.03B
Digital Realty Trust (DLR)	$64.73B
Realty Income (O)	$58.49B
Public Storage (PSA)	$57.22B

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