CoStar Group (MIL:1CSGP) PEG Ratio: N/A (As of Jun. 27, 2026)


MIL:1CSGP CoStar Group Inc MIL:1CSGP
56 GF Score
Price €26.90
GF Value €90.73
Valuation Significantly Undervalued
! 1 Warning Sign
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What is CoStar Group PEG Ratio?

PE Ratio without NRI / 5-Year EBITDA Growth Rate*

PEG Ratio is defined as the PE Ratio without NRI divided by the growth ratio. The growth rate we use is the 5-Year EBITDA growth rate. As of today, CoStar Group's PE Ratio without NRI is 33.33. CoStar Group's 5-Year EBITDA growth rate is -22.10%. Therefore, CoStar Group's PEG Ratio for today is N/A.

* The 5-Year EBITDA Growth Rate is the 5-year average EBITDA per share growth rate. While the denominator is a percentage, we use the whole number as opposed to the decimal form for the calculation. For example, 5% would be shown as 5 as opposed to 0.05. If it's smaller than or equal to 0, then the PEG Ratio is not calculated.


The historical rank and industry rank for CoStar Group's PEG Ratio or its related term are showing as below:


During the past 13 years, CoStar Group's highest PEG Ratio was 25.01. The lowest was 1.56. And the median was 3.08.


MIL:1CSGP's PEG Ratio is not ranked *
in the Real Estate industry.
Industry Median: 0.77
* Ranked among companies with meaningful PEG Ratio only.

Peter Lynch thinks a company with a P/E ratio equal to its growth rate is fairly valued.


CoStar Group  (MIL:1CSGP) PEG Ratio Explanation

To compare stocks with different growth rates, Peter Lynch invented a ratio called PEG Ratio. PEG Ratio is defined as the P/E ratio divided by the growth ratio. He thinks a company with a P/E ratio equal to its growth rate is fairly valued. Still he said he would rather buy a company growing 20% a year with a P/E of 20, instead of a company growing 10% a year with a P/E of 10.


CoStar Group PEG Ratio Related Terms


CoStar Group PEG Ratio Historical Data

* Premium members only.

The historical data trend for CoStar Group's PEG Ratio 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 PEG Ratio Chart

CoStar Group Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
PEG Ratio
Get a 7-Day Free Trial Premium Member Only Premium Member Only 4.34 4.16 22.81 0.00 0.00

CoStar Group Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
PEG Ratio 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 0.00 0.00 0.00 0.00 0.00

MIL:1CSGP vs JLL, BEKE, COMP: PEG Ratio Comparison

For the Real Estate Services subindustry, CoStar Group's PEG Ratio, along with its competitors' market caps and PEG Ratio 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 PEG Ratio vs Real Estate Industry

For the Real Estate industry and Real Estate sector, CoStar Group's PEG Ratio distribution charts can be found below:

* The bar in red indicates where CoStar Group's PEG Ratio falls into.


MIL:1CSGP
56GF Score
CoStar Group Inc MIL:1CSGP
PEG Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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CoStar Group PEG Ratio Calculation

PEG Ratio is defined as the PE Ratio without NRI divided by the growth ratio. The ratio we use is the 5-Year EBITDA growth rate.

CoStar Group's PEG Ratio for today is calculated as

PEG Ratio=PE Ratio without NRI/5-Year EBITDA Growth Rate*
=33.333333333333/-22.10
=N/A

* 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.

* Note: The 5-Year EBITDA Growth Rate is the 5-year average EBITDA per share growth rate. While the denominator is a percentage, we use the whole number as opposed to the decimal form for the calculation. For example, 5% would be shown as 5 as opposed to 0.05. If it's smaller than or equal to 0, then the PEG Ratio is not calculated.

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 70.4% below its estimated GF Value™ of €90.73. GuruFocus considers CoStar Group to be Significantly Undervalued.

Key valuation signals for MIL:1CSGP:

  • PEG Ratio: N/A
  • GF Value™: €90.73 vs. price of €26.90 (70.4% 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

PEG Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€26.90
Price
€90.73
GF Value