Market Cap for CoStar Group (CSGP)
According to CoStar Group's latest reported financial statements, the company's latest reported market cap is $28.21B USD. 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 .
CSGP
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Latest period
$28.21B
YoY change
-49.2%
5Y CAGR
-14.3%
Peak year (2023)
$35.56B
Latest annual
$14.36B
Market Cap history chart for CoStar Group (CSGP) from 1998 to 2026
Market Cap history table for CoStar Group (CSGP) from 1998 to 2026
| Fiscal year | Period ended | Reported | Market Cap | YoY |
|---|---|---|---|---|
| 2026 | $14.36B | -49.2% | ||
| 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 (10-Q quarterly and 10-K annual filings with the U.S. Securities and Exchange Commission). Each row shows the period end date and the date the filing was reported; YoY compares each figure to the same period one year earlier. Amounts are in USD as filed.
Analysis
As of the 2026 fiscal year, CoStar Group (CSGP) reported market cap of $14.36B – plunged 49.2% year-over-year.
Looking at the 2021–2026 (5 years) stretch, CoStar Group market cap compounded at -14.3% per year, with a net decline across the window.
CoStar Group market cap peaked at $35.56B in 2023; the latest annual figure is $14.36B in 2026 (59.6% below peak).
$35.56B stands as the all-time-high annual market cap, posted in 2023, against a low of $90.88M during 1998.
Among 8 Real Estate peers, CoStar Group (CSGP) ranks 9th; the peer median for market cap is $75.03B.
CoStar Group Market Cap by Year
CoStar Group Market Cap 2026: $14.36B
CoStar Group market cap in 2026 was $14.36B, plunged 49.2% below 2025.
CoStar Group Market Cap 2025: $28.29B
CoStar Group market cap in 2025 was $28.29B, edged down 3.1% below 2024.
CoStar Group Market Cap 2024: $29.19B
CoStar Group market cap in 2024 was $29.19B, declined 17.9% below 2023.
CoStar Group Market Cap 2023: $35.56B
CoStar Group market cap in 2023 was $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 — Market Cap
Companies in the same sector as CoStar Group, ranked by their latest market cap.
| Company | Market Cap | Sector |
|---|---|---|
| Welltower Inc. (WELL) | $150.38B | Real Estate |
| Prologis, Inc. (PLD) | $131.94B | Real Estate |
| Equinix, Inc. (EQIX) | $106.16B | Real Estate |
| American Tower Corporation (AMT) | $83.20B | Real Estate |
| Digital Realty Trust, Inc. (DLR) | $66.86B | Real Estate |
| Simon Property Group, Inc. (SPG) | $65.86B | Real Estate |
| Realty Income Corporation (O) | $59.26B | Real Estate |
| Public Storage (PSA) | $52.16B | Real Estate |
Frequently asked questions
What is CoStar Group's market cap?
- Latest reported market cap for CoStar Group (CSGP) is $28.21B (period ending December 31, 2025).
How has CoStar Group market cap changed year-over-year?
- CoStar Group (CSGP) market cap changed -49.2% year-over-year on the latest annual filing.
What is the long-term growth rate of CoStar Group market cap?
- CoStar Group (CSGP) market cap compound annual growth rate is -14.3% over the most recent 5 years available.
When did CoStar Group market cap hit its highest annual value?
- CoStar Group market cap reached its highest annual value of $35.56B in 2023.
What was CoStar Group market cap in 2025?
- CoStar Group (CSGP) market cap in 2025 was $28.29B.
What was CoStar Group market cap in 2026?
- CoStar Group (CSGP) market cap in 2026 was $14.36B.
Metrics overview
Pick a metric for charts, filings, and peers — each row shows the latest TTM or annual value with year-over-year change.
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CSGP Overview
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