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CSGP
Volume: 9.6M

CoStar Group (CSGP) Market Capitalization Overview

Market Cap: $12.23B as of Oct 30, 2026

$12.23B
$1.31B (11.95%)past month
As of Oct 30, 2026, CoStar Group (CSGP) has a market capitalization of $12.23B. Over the past 30 days, its market cap has decreased by -13.32%, while in the last 12 months, it has decreased by -57.1%.

Market capitalization represents the total value of CoStar Group as perceived by the stock market. It is calculated by multiplying the current stock price by the total number of outstanding shares.

CoStar Group (CSGP) Market Cap Formula = Stock Price * Shares Outstanding

The market cap of CoStar Group (CSGP) helps investors assess the company's size and compare it with competitors for better investment decisions.

CoStar Group (CSGP) Market Cap & Key Trends

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CoStar Group (CSGP) Market Cap History

DateMarket CapChange
Oct 1, 2026$11.24B-13.32%
Sep 1, 2026$12.96B+6.49%
Aug 3, 2026$12.17B+1.49%
Jul 1, 2026$11.99B-13.29%
Jun 1, 2026$13.83B-5.13%
May 1, 2026$14.58B-12.39%
Apr 1, 2026$16.64B-12.26%
Mar 2, 2026$18.97B-26.87%
Feb 2, 2026$25.93B-6.87%
Jan 2, 2026$27.85B-3.43%

CoStar Group (CSGP) End of Year Market Cap History

DateMarket CapChange
2026$12.23B-57.10%
2025$28.50B-2.90%
2024$29.35B-17.76%
2023$35.69B+13.55%
2022$31.43B+0.70%
2021$31.22B—

FAQs About CoStar Group (CSGP) Market Cap

As of Oct 30, 2026, the market capitalization of CoStar Group (CSGP) is $12.23B. Market cap represents the total value of a company’s outstanding shares and is a key indicator of its size in the stock market.

In the last 30 days, CoStar Group’s market capitalization has increased by 11.95%, changing from $10.93B to $12.23B as of Oct 30, 2026.

In the last 3 months, CoStar Group’s market capitalization has increased by —, changing from – to – as of –.

In the year 2025, CoStar Group’s market capitalization decreased from $29.35B in January to $28.50B in December, reflecting a -2.9% change.

In the past five years, CoStar Group (CSGP) has had a compound annual growth rate (CAGR) of -1.80% in market capitalization. This means its market cap has shrunk at an average rate of -1.80% per year.

CoStar Group (CSGP)

Volume: 9.6M

CoStar Group (CSGP) Market Cap & Key Trends

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