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ACEA SpAMIL:ACE 57 Shiller PE Ratio is 12.17 as of Aug. 12, 2026, which is 32% below its 10-year median of 17.89. GuruFocus rates MIL:ACE with a GF Score™ of 57/100 and a GF Value™ of €16.70 (Modestly Overvalued). The stock has 6 warning signs investors should review. Among 396 Utilities - Regulated companies, ACEA SpA ranks better than 67.93% on this metric.
As of today (2026-08-12), ACEA SpA's current share price is €21.18. ACEA SpA's E10 for the quarter that ended in Jun. 2026 was €1.74. ACEA SpA's Shiller PE Ratio for today is 12.17.
The historical rank and industry rank for ACEA SpA's Shiller PE Ratio or its related term are showing as below:
MIL:ACE'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 7.81 Med: 17.89 Max: 28.27
Current: 12.3
During the past years, ACEA SpA's highest Shiller PE Ratio was 28.27. The lowest was 7.81. And the median was 17.89.
MIL:ACE's Shiller PE Ratio is ranked better than 67.93% of 396
companies
in the Utilities - Regulated industry
Industry Median: 16.8
vs MIL:ACE: 12.30
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.
ACEA SpA's adjusted earnings per share data for the three months ended in Jun. 2026 was €1.617. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is €1.74 for the trailing ten years ended in Jun. 2026.
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.
ACEA SpA Shiller PE Ratio Related Terms
ACEA SpA Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for ACEA 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.
For the Utilities - Diversified subindustry, ACEA 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.
ACEA SpA Shiller PE Ratio vs Utilities - Regulated Industry
For the Utilities - Regulated industry and Utilities sector, ACEA SpA's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where ACEA 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.
ACEA 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.
ACEA SpA's E10 for the quarter that ended in Jun. 2026 is calculated as:
For example, ACEA SpA's adjusted earnings per share data for the three months ended in Jun. 2026 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.
ACEA SpA (MIL:ACE) has a Shiller PE Ratio of 12.17 as of Aug. 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 ACEA SpA and its competitors. This is 32% below median its historical median of 17.89. Over the past decade, ACEA SpA's Shiller PE Ratio has ranged from 7.81 to 28.27. According to the industry distribution chart, ACEA SpA ranks #127 out of 396 companies in the Utilities - Regulated industry, placing it in the top 32.1%.
Is ACEA SpA's Shiller PE Ratio too high?
ACEA SpA's current Shiller PE Ratio of 12.17 is 32% below median its 10-year median of 17.89. Over the past 10 years, this metric has ranged from a low of 7.81 to a high of 28.27. The Utilities - Regulated industry median Shiller PE Ratio is 16.80. ACEA SpA's value of 12.17 is 27.6% below this industry median. Based on the distribution chart, ACEA SpA ranks #127 out of 396 companies in the Utilities - Regulated industry, which is above the industry midpoint. Overall, ACEA SpA has a GF Score™ of 57/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does ACEA SpA's Shiller PE Ratio compare to SRE?
According to the Utilities - Regulated industry distribution chart, ACEA SpA ranks #127 out of 396 companies for Shiller PE Ratio. This puts ACEA SpA in the upper half of its industry. The industry median Shiller PE Ratio is 16.80. ACEA SpA's value of 12.17 is 27.6% below this benchmark. Historically, ACEA SpA's own Shiller PE Ratio has ranged from 7.81 to 28.27 over the past decade. While the company's 10-year median is 17.89 vs. the industry median of 16.80, ACEA SpA has consistently been below 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 16.80, based on 396 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. ACEA SpA's current Shiller PE Ratio of 12.17 is 27.6% below 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 ACEA SpA and its competitors. For the Utilities - Regulated industry, the median Shiller PE Ratio is 16.80 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. ACEA SpA's current Shiller PE Ratio is 12.17, which is 32% below median its own 10-year median of 17.89. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is ACEA SpA stock overvalued right now?
Based on GuruFocus' analysis, ACEA SpA (MIL:ACE) is currently considered Modestly Overvalued. The stock's GF Value™ is €16.70, compared to a current price of €21.18 — trading 26.8% above its estimated fair value. The current Shiller PE Ratio is 12.17, which is 32% below median its 10-year median of 17.89 and 27.6% below the Utilities - Regulated industry median of 16.80. ACEA SpA's overall GF Score™ is 57/100 with 6 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 ACEA SpA (MIL:ACE), the current Shiller PE Ratio is 12.17 as of Aug. 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 ACEA SpA (MIL:ACE) Overvalued in 2026?
Based on GuruFocus' analysis, ACEA SpA stock appears to be overvalued.
The current stock price of €21.18 is trading 26.8% above its estimated GF Value™ of €16.70.
GuruFocus considers ACEA SpA to be Modestly Overvalued.
Key valuation signals for MIL:ACE:
Shiller PE Ratio: 12.17 (32% below median its 10-year median of 17.89)
GF Value™: €16.70 vs. price of €21.18 (26.8% above fair value)
Industry Position: 27.6% below the Utilities - Regulated median (#127 of 396)
No single metric tells the full story. See the MIL:ACE stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
ACEA SpA is an Italian-based electricity and water utility company. It operates chiefly in Rome and other cities in Lazio, a central Italian region. With the help of its various subsidiaries and numerous ventures, Acea produces and sells energy, utilities, and environmental products and services. The operating segments of the firm include: Water, Networks and Public Lighting, Environment, Production, Commercial, and Engineering & Infrastructure Projects.
57GF Score
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