CoStar GroupMIL:1CSGP 56 Market Cap is €10,303 Mil as of Jun. 26, 2026. GuruFocus rates MIL:1CSGP with a GF Score™ of 56/100 and a GF Value™ of €95.81 (Significantly Undervalued). The stock has 1 warning sign investors should review. Among 1,847 Real Estate companies, CoStar Group ranks better than 98.48% on this metric.
Market cap is the total market value to buy the whole company. It is equal to the share price times the number of Shares Outstanding (EOP). CoStar Group's share price for the quarter that ended in Mar. 2026 was €38.23. CoStar Group's Shares Outstanding (EOP) for the quarter that ended in Mar. 2026 was 407 Mil. Therefore, CoStar Group's market cap for the quarter that ended in Mar. 2026 was €15,563 Mil.
CoStar Group's quarterly market cap
declined
from Sep. 2025 (€32,581 Mil) to Dec. 2025 (€23,950 Mil) and
declined
from Dec. 2025 (€23,950 Mil) to Mar. 2026 (€15,563 Mil).
CoStar Group's annual market cap
increased
from Dec. 2023 (€0 Mil) to Dec. 2024 (€30,168 Mil) but then
declined
from Dec. 2024 (€30,168 Mil) to Dec. 2025 (€23,950 Mil).
Enterprise Value is the theoretical takeover price. It is more comprehensive than market capitalization (market cap), which only includes common equity. Enterprise Value is calculated as the market cap plus debt and minority interest and preferred shares, minus total cash and cash equivalents. CoStar Group's Enterprise Value for Today is €10,314 Mil.
CoStar Group (MIL:1CSGP) Market Cap Explanation
Market cap is not the real price you pay for a company. If you buy the company and become its owner, you become the owner of the cash the company has, and you also assume the companys debt. The real price you pay is the Enterprise Value.
Warren Buffett uses the ratio of total market cap of all public traded companies over GDP to measure if the market is expensive. As of April 2012, the US total market cap is about $14.7 trillion, while the US GDP is about $15 trillion. The market was modestly overvalued.
CoStar Group Market Cap Related Terms
CoStar Group Market Cap Historical Data
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The historical data trend for CoStar Group's Market Cap can be seen below:
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
MIL:1CSGP vs JLL, BEKE, COMP: Market Cap Comparison
For the Real Estate Services subindustry, CoStar Group's Market Cap, along with its competitors' market caps and Market Cap data, can be viewed below:
* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.
CoStar Group Market Cap vs Real Estate Industry
For the Real Estate industry and Real Estate sector, CoStar Group's Market Cap distribution charts can be found below:
* The bar in red indicates where CoStar Group's Market Cap falls into.
Market cap is the short version of market capitalization. It is the total market value to buy the whole company. It is equal to the share price times the number of shares outstanding.
CoStar Group's Market Cap for the fiscal year that ended in Dec. 2025 is calculated as
* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD. * For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.
CoStar Group (MIL:1CSGP) has a Market Cap of €10,303 Mil as of Jun. 26, 2026. Market cap equals the total value of a company's shares: price times shares outstanding. View historical data on CoStar Group and its competitors. According to the industry distribution chart, CoStar Group ranks #28 out of 1847 companies in the Real Estate industry, placing it in the top 1.5%.
Is CoStar Group's Market Cap too high?
CoStar Group's current Market Cap is €10,303 Mil. Based on the distribution chart, CoStar Group ranks #28 out of 1847 companies in the Real Estate industry, which is in the top quartile — a strong position relative to peers. Overall, CoStar Group has a GF Score™ of 56/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does CoStar Group's Market Cap compare to JLL and BEKE?
According to the Real Estate industry distribution chart, CoStar Group ranks #28 out of 1847 companies for Market Cap. This places CoStar Group in the top 2% of its industry — outperforming the majority of peers. The industry median Market Cap is 106.06. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Market Cap for a Real Estate company?
The median Market Cap among Real Estate companies is 106.06, based on 1,847 companies in the industry. Companies in the top quartile (top 25%) have a Market Cap significantly above this median, while those in the bottom quartile fall well below. However, Market Cap should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Market Cap mean?
A high Market Cap can signal that a stock is expensive relative to its fundamentals. Market cap equals the total value of a company's shares: price times shares outstanding. View historical data on CoStar Group and its competitors. For the Real Estate industry, the median Market Cap is 106.06 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. CoStar Group's current Market Cap is €10,303 Mil. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is CoStar Group stock overvalued right now?
Based on GuruFocus' analysis, CoStar Group (MIL:1CSGP) is currently considered Significantly Undervalued. The stock's GF Value™ is €95.81, compared to a current price of €26.90 — trading 71.9% below its estimated fair value. The current Market Cap is €10,303 Mil. CoStar Group's overall GF Score™ is 56/100 with 1 warning sign to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Market Cap calculated?
Market Cap is calculated from a company's financial statements. For CoStar Group (MIL:1CSGP), the current Market Cap is €10,303 Mil as of Jun. 26, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.
Is CoStar Group (MIL:1CSGP) Overvalued in 2026?
Based on GuruFocus' analysis, CoStar Group stock appears to be undervalued.
The current stock price of €26.90 is trading 71.9% below its estimated GF Value™ of €95.81.
GuruFocus considers CoStar Group to be Significantly Undervalued.
Key valuation signals for MIL:1CSGP:
Market Cap: €10,303 Mil
GF Value™: €95.81 vs. price of €26.90 (71.9% below fair value)
No single metric tells the full story. See the MIL:1CSGP stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
CoStar Group is a global provider of proprietary information, analytics, and online marketplaces serving both commercial and residential real estate. The firm operates through a diverse portfolio of brands, including CoStar Suite for commercial real estate research, LoopNet for commercial listings, Apartments.com for multifamily rentals, and Homes.com for residential brokerage. It primarily sells high-margin software-as-a-service subscriptions that provide institutional clients with forensic property data and premium advertising visibility. With operations across North America, Europe, and Asia-Pacific, CoStar maintains the industry's most comprehensive centralized real estate database, functioning as a critical information utility for brokers, lenders, and owners worldwide.
56GF Score
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