CoStar Group (CSGP) Market Cap 1998–2026

As of October 29, 2026, CoStar Group had a market cap of $11.39 billion, which increased by 2.15% compared to the previous trading day. Market capitalization, often referred to as market cap, represents the total value of a company's outstanding shares on the stock market and is a common measure of its overall size and valuation.

Data updated: Oct 29, 2026, 4:00 PM ET
CoStar Group logo

CoStar Group Inc. (CSGP)

🌍 United States 📈 NASDAQ 🏭 Real Estate 🏢 Real Estate Management & Development
Latest Market Cap
$11.39B ▲ 2.15%
Start of 2026
$28.5B ▼ 60.04%
1 Year Ago
$29.52B ▼ 61.42%
All-Time High
$41.02B ▼ 72.23%


Loading data...

Note: Each point on the chart represents the market capitalization at the end of the trading day.
Source: Data compiled from EDGAR filings, Bloomberg and Yahoo Finance.

📈 CoStar Group Market Cap History by Year and Month

CoStar Group Market Cap History by Year and Month
Year / MonthMarket Cap% Change
2026$11.39B▼ 60.04%
$11.39B▲ 2.71%
$11.09B▼ 14.56%
$12.98B▲ 11.51%
$11.64B▲ 0.95%
$11.53B▼ 12.32%
$13.15B▼ 6.94%
$14.13B▼ 16.54%
$16.93B▼ 10.52%
$18.92B▼ 27.43%
$26.07B▼ 8.53%
2025$28.5B▼ 2.78%
2024$29.316B▼ 17.85%
2023$35.687B▲ 13.55%
2022$31.429B▲ 0.70%
All market cap values reflect closing prices for the period shown.

📊 CoStar Group Market Cap and Other Industry Peers

Below are selected companies from the Real Estate sector / subsector:

  1. $37.08B
  2. $16.26B
  3. $13.72B
  4. $13.7B
  5. $13.46B
  6. $13.06B
  7. $11.49B
  8. $11.42B
  9. $11.39B
  10. $11.38B
  11. $11.36B
  12. $10.74B
  13. $10.35B
  14. $10.31B
  15. $10.05B
  16. $9.68B
  17. $9.26B
  18. $7.07B
  19. $6.97B
  20. $4.51B

Data reflect the most recent market capitalization values available.

Note: Market capitalization figures are based on available sources and may differ slightly from actual values, particularly for historical data.