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Italgas SpAMIL:IG +0.07%71 Shiller PE Ratio is 18.01 as of Sep. 12, 2026, which is 19% below its 10-year median of 22.17. GuruFocus rates MIL:IG with a GF Score™ of 71/100 and a GF Value™ of €7.39 (Modestly Overvalued). The stock has 5 warning signs investors should review. Among 397 Utilities - Regulated companies, Italgas SpA ranks worse than 55.16% on this metric.
As of today (2026-09-12), Italgas SpA's current share price is €8.284. Italgas SpA's E10 for the fiscal year that ended in Dec25 was €0.46. Italgas SpA's Shiller PE Ratio for today is 18.01.
The historical rank and industry rank for Italgas SpA's Shiller PE Ratio or its related term are showing as below:
MIL:IG'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 18.09 Med: 22.17 Max: 23.8
Current: 18.09
During the past 10 years, Italgas SpA's highest Shiller PE Ratio was 23.80. The lowest was 18.09. And the median was 22.17.
MIL:IG's Shiller PE Ratio is ranked worse than 55.16% of 397
companies
in the Utilities - Regulated industry
Industry Median: 16.82
vs MIL:IG: 18.09
E10 is a concept invented by Prof. Robert Shiller, who uses E10 for his Shiller PE Ratio calculation. E10 is the average of the inflation adjusted earnings of a company over the past 10 years.
Italgas SpA's adjusted earnings per share data of for the fiscal year that ended in Dec25 was €0.720. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is €0.46 for the trailing ten years ended in Dec25.
Shiller PE for Stocks: The True Measure of Stock Valuation
Compared with the regular PE Ratio, which works poorly for cyclical businesses, the Shiller PE Ratio smoothed out the fluctuations of profit margins during business cycles. Therefore it is more accurate in reflecting the valuation of the company.
If a company has consistent business performance, the Shiller PE Ratio should give similar results to regular PE Ratio.
Compared with the PS Ratio, the Shiller PE Ratio makes the comparison between different industries more meaningful.
Be Aware
Shiller PE Ratio assumes that over the long term, businesses and profitability revert to their means. If a company's business model does not work in the future compared with the past, Shiller PE Ratio and PS Ratio will give false valuations.
Italgas SpA Shiller PE Ratio Related Terms
Italgas SpA Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for Italgas SpA's Shiller PE 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.
MIL:IG vs ATO, NI, UGI: Shiller PE Ratio Comparison
For the Utilities - Regulated Gas subindustry, Italgas SpA's Shiller PE Ratio, along with its competitors' market caps and Shiller PE 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.
Italgas SpA Shiller PE Ratio vs Utilities - Regulated Industry
For the Utilities - Regulated industry and Utilities sector, Italgas SpA's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Italgas SpA's Shiller PE Ratio falls into.
For Shiller PE Ratio, the earnings of the past 10 years are inflation-adjusted and averaged. The result is used for P/E calculation. Since it looks at the average over the last 10 years, the Shiller PE Ratio is also called PE10.
The Shiller PE Ratio was first used by professor Robert Shiller to measure the valuation of the overall market. The same calculation is applied here to individual companies.
Italgas SpA's Shiller PE Ratio for today 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.
Italgas SpA's E10 for the fiscal year that ended in Dec25 is calculated as:
For example, Italgas SpA's adjusted earnings per share data for the fiscal year that ended in Dec25 was:
Add all the adjusted EPS together and divide 10 will get our E10.
Please note that we use the CPI data of the country/region where the company is headquartered. If the CPI data for that country/region is not available, then we will use the CPI data of the United States as default.
Italgas SpA (MIL:IG) has a Shiller PE Ratio of 18.01 as of Sep. 12, 2026. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Italgas SpA and its competitors. This is 19% below median its historical median of 22.17. Over the past decade, Italgas SpA's Shiller PE Ratio has ranged from 18.09 to 23.80. According to the industry distribution chart, Italgas SpA ranks #219 out of 397 companies in the Utilities - Regulated industry, placing it in the top 55.2%.
Is Italgas SpA's Shiller PE Ratio too high?
Italgas SpA's current Shiller PE Ratio of 18.01 is 19% below median its 10-year median of 22.17. Over the past 10 years, this metric has ranged from a low of 18.09 to a high of 23.80. The Utilities - Regulated industry median Shiller PE Ratio is 16.82. Italgas SpA's value of 18.01 is 7.1% above this industry median. Based on the distribution chart, Italgas SpA ranks #219 out of 397 companies in the Utilities - Regulated industry, which is below the industry midpoint. Overall, Italgas SpA has a GF Score™ of 71/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Italgas SpA's Shiller PE Ratio compare to ATO and NI?
According to the Utilities - Regulated industry distribution chart, Italgas SpA ranks #219 out of 397 companies for Shiller PE Ratio. This places Italgas SpA in the lower half of its industry. The industry median Shiller PE Ratio is 16.82. Italgas SpA's value of 18.01 is 7.1% above this benchmark. Historically, Italgas SpA's own Shiller PE Ratio has ranged from 18.09 to 23.80 over the past decade. While the company's 10-year median is 22.17 vs. the industry median of 16.82, Italgas SpA has consistently been above the industry average. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Shiller PE Ratio for an Utilities - Regulated company?
The median Shiller PE Ratio among Utilities - Regulated companies is 16.82, based on 397 companies in the industry. Companies in the top quartile (top 25%) have a Shiller PE Ratio significantly above this median, while those in the bottom quartile fall well below. However, Shiller PE Ratio should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Italgas SpA's current Shiller PE Ratio of 18.01 is 7.1% above the industry median. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Shiller PE Ratio mean?
A high Shiller PE Ratio can signal that a stock is expensive relative to its fundamentals. Shiller price-earnings ratio is the ratio of share price to a company's inflation-adjusted earnings over a 10-year period. View historical data on Italgas SpA and its competitors. For the Utilities - Regulated industry, the median Shiller PE Ratio is 16.82 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Italgas SpA's current Shiller PE Ratio is 18.01, which is 19% below median its own 10-year median of 22.17. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Italgas SpA stock overvalued right now?
Based on GuruFocus' analysis, Italgas SpA (MIL:IG) is currently considered Modestly Overvalued. The stock's GF Value™ is €7.39, compared to a current price of €8.28 — trading 12.1% above its estimated fair value. The current Shiller PE Ratio is 18.01, which is 19% below median its 10-year median of 22.17 and 7.1% above the Utilities - Regulated industry median of 16.82. Italgas SpA's overall GF Score™ is 71/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Shiller PE Ratio calculated?
Shiller PE Ratio is calculated from a company's financial statements. For Italgas SpA (MIL:IG), the current Shiller PE Ratio is 18.01 as of Sep. 12, 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 Italgas SpA (MIL:IG) Overvalued in 2026?
Based on GuruFocus' analysis, Italgas SpA stock appears to be overvalued.
The current stock price of €8.28 is trading 12.1% above its estimated GF Value™ of €7.39.
GuruFocus considers Italgas SpA to be Modestly Overvalued.
Key valuation signals for MIL:IG:
Shiller PE Ratio: 18.01 (19% below median its 10-year median of 22.17)
GF Value™: €7.39 vs. price of €8.28 (12.1% above fair value)
Industry Position: 7.1% above the Utilities - Regulated median (#219 of 397)
No single metric tells the full story. See the MIL:IG stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Italgas SpA is an Italy-based company engaged in the business of natural gas distribution. The distribution service consists of transporting gas through local pipeline networks, from points of delivery at the reduction and measurement stations interconnected with the transport networks up to the final delivery points to customers. In addition, the company is also engaged in metering activities, which consist of determining, gathering, making available, and archiving metering data on natural gas withdrawn over the distribution networks. It derives a majority of its revenue from natural gas distribution activity. The other activities of the company are the distribution and sale of water and providing technical, engineering, IT assistance, and other services.
71GF Score
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