CoStar Group (MIL:1CSGP) Shares Outstanding (EOP): 407 Mil (As of Mar. 2026)


MIL:1CSGP CoStar Group Inc MIL:1CSGP
56 GF Score
Price €26.90
GF Value €95.81
Valuation Significantly Undervalued
! 1 Warning Sign
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What is CoStar Group Shares Outstanding (EOP)?

CoStar Group MIL:1CSGP 56 Shares Outstanding (EOP) is 407 Mil as of Mar. 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.

Shares outstanding are shares that have been authorized, issued, and purchased by investors and are held by them. CoStar Group's shares outstanding for the quarter that ended in Mar. 2026 was 407 Mil.

CoStar Group's quarterly shares outstanding declined from Dec. 2025 (418 Mil) to Mar. 2026 (407 Mil). It means CoStar Group bought back shares from Dec. 2025 to Mar. 2026 .

CoStar Group's annual shares outstanding increased from Dec. 2024 (410 Mil) to Dec. 2025 (418 Mil). It means CoStar Group issued new shares from Dec. 2024 to Dec. 2025 .


CoStar Group  (MIL:1CSGP) Shares Outstanding (EOP) Explanation

A company may buy back shares or issue shares in any fiscal period. If a company buys back shares, we should observe that the total number of shares decline. If the company issues new shares, the number of shares outstanding increases.

Usually the presence of treasury shares and a history of buyback are good indicators that company has competitive advantage. But studies have shown that companies usually buy back at wrong time. Buying back shares below its intrinsic value increases value for remaining shareholders. Buying back overvalued shares destroys value for existing shareholders.


Be Aware

Warren Buffett looks for consistency and upward long term trend. Because of share repurchase it is possible for net earnings trend to differ from EPS trend. He preferred net income over EPS. The companies with durable competitive advantage companies report higher % net earnings to total revenues.

Important: If a company is showing net earnings history greater than 20% on total revenues, it is probably benefiting from a long term competitive advantage.

If net earnings is less than 10%, likely to be in a highly competitive business.


CoStar Group Shares Outstanding (EOP) Related Terms


CoStar Group Shares Outstanding (EOP) Historical Data

* Premium members only.

The historical data trend for CoStar Group's Shares Outstanding (EOP) 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.

CoStar Group Shares Outstanding (EOP) Chart

CoStar Group Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Shares Outstanding (EOP)
Get a 7-Day Free Trial Premium Member Only Premium Member Only 394.94 406.67 408.10 409.50 417.90

CoStar Group Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Shares Outstanding (EOP) Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 409.50 424.10 424.90 417.90 407.10

MIL:1CSGP vs JLL, BEKE, COMP: Shares Outstanding (EOP) Comparison

For the Real Estate Services subindustry, CoStar Group's Shares Outstanding (EOP), along with its competitors' market caps and Shares Outstanding (EOP) 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 Shares Outstanding (EOP) vs Real Estate Industry

For the Real Estate industry and Real Estate sector, CoStar Group's Shares Outstanding (EOP) distribution charts can be found below:

* The bar in red indicates where CoStar Group's Shares Outstanding (EOP) falls into.


MIL:1CSGP
56GF Score
CoStar Group Inc MIL:1CSGP
Shares Outstanding (EOP) is just one metric. See GF Score™, valuation, warning signs, and more.
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CoStar Group Shares Outstanding (EOP) Calculation

Shares outstanding are shares that have been authorized, issued, and purchased by investors and are held by them. They have voting rights and represent ownership in the corporation by the person that holds the shares. They should be distinguished from treasury shares, which are shares held by the corporation itself, having no exercisable rights.

Shares outstanding can be calculated as either basic or fully diluted. The fully diluted shares outstanding count includes diluting securities, such as options, warrants or convertibles.

Please note: GuruFocus named Shares Outstanding (EOP) is the shares for that end of period. It is usually used to calculate balance sheet related items, such as Book Value per Share, etc. While Shares Outstanding (Diluted Average) and Shares Outstanding (Basic Average) are the weighted average shares over a period of time (a year, a quarter, or so). They are usually used to calculate income statement or cashflow statement related items, such as Earnings per Share (Diluted), etc.

What does a Shares Outstanding (EOP) of 407 Mil mean?
CoStar Group (MIL:1CSGP) has a Shares Outstanding (EOP) of 407 Mil as of Mar. 2026. The total shares a company has outstanding, at period-end. View historical data on CoStar Group and its competitors.
Is CoStar Group's Shares Outstanding (EOP) too high?
CoStar Group's current Shares Outstanding (EOP) is 407 Mil. 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 Shares Outstanding (EOP) compare to JLL and BEKE?
CoStar Group's Shares Outstanding (EOP) of 407 Mil can be compared against companies in the Real Estate industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Shares Outstanding (EOP) for a Real Estate company?
A good Shares Outstanding (EOP) depends on the Real Estate industry context. However, Shares Outstanding (EOP) 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 Shares Outstanding (EOP) mean?
A high Shares Outstanding (EOP) can signal that a stock is expensive relative to its fundamentals. The total shares a company has outstanding, at period-end. View historical data on CoStar Group and its competitors. CoStar Group's current Shares Outstanding (EOP) is 407 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 Shares Outstanding (EOP) is 407 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 Shares Outstanding (EOP) calculated?
Shares Outstanding (EOP) is calculated from a company's financial statements. For CoStar Group (MIL:1CSGP), the current Shares Outstanding (EOP) is 407 Mil as of Mar. 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:

  • Shares Outstanding (EOP): 407 Mil
  • GF Value™: €95.81 vs. price of €26.90 (71.9% below fair value)
  • GF Score™: 56/100 with 1 warning sign

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 Business Description

Address 1201 Wilson Boulevard, Arlington, VA, USA, 22209
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

Get the complete analysis for MIL:1CSGP

Shares Outstanding (EOP) is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€26.90
Price
€95.81
GF Value