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AtcoACLLF +1.36%69 Shiller PE Ratio is 22.88 as of Aug. 21, 2026, which is 62% above its 10-year median of 14.13. GuruFocus rates ACLLF with a GF Score™ of 69/100 and a GF Value™ of $38.58 (Significantly Overvalued). The stock has 12 warning signs investors should review. Among 396 Utilities - Regulated companies, Atco ranks worse than 69.7% on this metric.
As of today (2026-08-21), Atco's current share price is $55.15. Atco's E10 for the quarter that ended in Jun. 2026 was $2.41. Atco's Shiller PE Ratio for today is 22.88.
The historical rank and industry rank for Atco's Shiller PE Ratio or its related term are showing as below:
ACLLF'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 10.3 Med: 14.13 Max: 23.4
Current: 22.6
During the past years, Atco's highest Shiller PE Ratio was 23.40. The lowest was 10.30. And the median was 14.13.
ACLLF's Shiller PE Ratio is ranked worse than 69.7% of 396
companies
in the Utilities - Regulated industry
Industry Median: 16.685
vs ACLLF: 22.60
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.
Atco's adjusted earnings per share data for the three months ended in Jun. 2026 was $0.556. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $2.41 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.
Atco Shiller PE Ratio Related Terms
Atco Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for Atco'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, Atco'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.
Atco Shiller PE Ratio vs Utilities - Regulated Industry
For the Utilities - Regulated industry and Utilities sector, Atco's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Atco'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.
Atco'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.
Atco's E10 for the quarter that ended in Jun. 2026 is calculated as:
For example, Atco'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.
Atco (ACLLF) has a Shiller PE Ratio of 22.88 as of Aug. 21, 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 Atco and its competitors. This is 62% above median its historical median of 14.13. Over the past decade, Atco's Shiller PE Ratio has ranged from 10.30 to 23.40. According to the industry distribution chart, Atco ranks #276 out of 396 companies in the Utilities - Regulated industry, placing it in the top 69.7%.
Is Atco's Shiller PE Ratio too high?
Atco's current Shiller PE Ratio of 22.88 is 62% above median its 10-year median of 14.13. Over the past 10 years, this metric has ranged from a low of 10.30 to a high of 23.40. The Utilities - Regulated industry median Shiller PE Ratio is 16.69. Atco's value of 22.88 is 37.1% above this industry median. Based on the distribution chart, Atco ranks #276 out of 396 companies in the Utilities - Regulated industry, which is below the industry midpoint. Overall, Atco has a GF Score™ of 69/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Atco's Shiller PE Ratio compare to SRE and AES?
According to the Utilities - Regulated industry distribution chart, Atco ranks #276 out of 396 companies for Shiller PE Ratio. This places Atco in the lower half of its industry. The industry median Shiller PE Ratio is 16.69. Atco's value of 22.88 is 37.1% above this benchmark. Historically, Atco's own Shiller PE Ratio has ranged from 10.30 to 23.40 over the past decade. While the company's 10-year median is 14.13 vs. the industry median of 16.69, Atco 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 16.69, 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. Atco's current Shiller PE Ratio of 22.88 is 37.1% 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 Atco and its competitors. For the Utilities - Regulated industry, the median Shiller PE Ratio is 16.69 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Atco's current Shiller PE Ratio is 22.88, which is 62% above median its own 10-year median of 14.13. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Atco stock overvalued right now?
Based on GuruFocus' analysis, Atco (ACLLF) is currently considered Significantly Overvalued. The stock's GF Value™ is $38.58, compared to a current price of $55.15 — trading 42.9% above its estimated fair value. The current Shiller PE Ratio is 22.88, which is 62% above median its 10-year median of 14.13 and 37.1% above the Utilities - Regulated industry median of 16.69. Atco's overall GF Score™ is 69/100 with 12 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 Atco (ACLLF), the current Shiller PE Ratio is 22.88 as of Aug. 21, 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 Atco (ACLLF) Overvalued in 2026?
Based on GuruFocus' analysis, Atco stock appears to be overvalued.
The current stock price of $55.15 is trading 42.9% above its estimated GF Value™ of $38.58.
GuruFocus considers Atco to be Significantly Overvalued.
Key valuation signals for ACLLF:
Shiller PE Ratio: 22.88 (62% above median its 10-year median of 14.13)
GF Value™: $38.58 vs. price of $55.15 (42.9% above fair value)
Industry Position: 37.1% above the Utilities - Regulated median (#276 of 396)
No single metric tells the full story. See the ACLLF stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Atco Ltd is a Canada-based diversified company. The company's Structures & Logistics segment offers workforce and residential housing, modular facilities, construction, site support services, workforce lodging services, facility operations and maintenance, defense operations services, and disaster and emergency management services. The Neltume Ports segment includes the equity interest in Neltume Ports S.A., a port operator and developer based in South America. The Retail Energy segment provides electricity and natural gas retail sales and home maintenance solutions. Its Canadian Utilities Limited segment includes ATCO Energy Systems, ATCO EnPower, and ATCO Australia. It generates maximum revenue from the ATCO Energy Systems segment and earns maximum revenue from Canada.
69GF Score
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