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AECOMACM -1.78%61 Shiller PE Ratio is 48.34 as of Sep. 01, 2026, which is 35% below its 10-year median of 74.55. GuruFocus rates ACM with a GF Score™ of 61/100 and a GF Value™ of $101.86 (Significantly Undervalued). The stock has 3 warning signs investors should review. Among 1,038 Construction companies, AECOM ranks worse than 85.84% on this metric.
As of today (2026-09-01), AECOM's current share price is $66.23. AECOM's E10 for the quarter that ended in Jun. 2026 was $1.37. AECOM's Shiller PE Ratio for today is 48.34.
The historical rank and industry rank for AECOM's Shiller PE Ratio or its related term are showing as below:
ACM'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 18.1 Med: 74.55 Max: 172.01
Current: 48.34
During the past years, AECOM's highest Shiller PE Ratio was 172.01. The lowest was 18.10. And the median was 74.55.
ACM's Shiller PE Ratio is ranked worse than 85.84% of 1038
companies
in the Construction industry
Industry Median: 16.975
vs ACM: 48.34
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.
AECOM's adjusted earnings per share data for the three months ended in Jun. 2026 was $-0.670. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is $1.37 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.
AECOM Shiller PE Ratio Related Terms
AECOM Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for AECOM'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 Engineering & Construction subindustry, AECOM'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.
AECOM Shiller PE Ratio vs Construction Industry
For the Construction industry and Industrials sector, AECOM's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where AECOM'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.
AECOM'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.
AECOM's E10 for the quarter that ended in Jun. 2026 is calculated as:
For example, AECOM'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.
AECOM (ACM) has a Shiller PE Ratio of 48.34 as of Sep. 01, 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 AECOM and its competitors. This is 35% below median its historical median of 74.55. Over the past decade, AECOM's Shiller PE Ratio has ranged from 18.10 to 172.01. According to the industry distribution chart, AECOM ranks #891 out of 1038 companies in the Construction industry, placing it in the top 85.8%.
Is AECOM's Shiller PE Ratio too high?
AECOM's current Shiller PE Ratio of 48.34 is 35% below median its 10-year median of 74.55. Over the past 10 years, this metric has ranged from a low of 18.10 to a high of 172.01. The Construction industry median Shiller PE Ratio is 16.98. AECOM's value of 48.34 is 184.8% above this industry median. Based on the distribution chart, AECOM ranks #891 out of 1038 companies in the Construction industry, which is in the bottom quartile relative to peers. Overall, AECOM has a GF Score™ of 61/100 and is considered Significantly Undervalued, reflecting its overall financial health beyond just this single metric.
How does AECOM's Shiller PE Ratio compare to DY and TTEK?
According to the Construction industry distribution chart, AECOM ranks #891 out of 1038 companies for Shiller PE Ratio. This places AECOM in the lower half of its industry. The industry median Shiller PE Ratio is 16.98. AECOM's value of 48.34 is 184.8% above this benchmark. Historically, AECOM's own Shiller PE Ratio has ranged from 18.10 to 172.01 over the past decade. While the company's 10-year median is 74.55 vs. the industry median of 16.98, AECOM 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 a Construction company?
The median Shiller PE Ratio among Construction companies is 16.98, based on 1,038 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. AECOM's current Shiller PE Ratio of 48.34 is 184.8% 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 AECOM and its competitors. For the Construction industry, the median Shiller PE Ratio is 16.98 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. AECOM's current Shiller PE Ratio is 48.34, which is 35% below median its own 10-year median of 74.55. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is AECOM stock overvalued right now?
Based on GuruFocus' analysis, AECOM (ACM) is currently considered Significantly Undervalued. The stock's GF Value™ is $101.86, compared to a current price of $66.23 — trading 35% below its estimated fair value. The current Shiller PE Ratio is 48.34, which is 35% below median its 10-year median of 74.55 and 184.8% above the Construction industry median of 16.98. AECOM's overall GF Score™ is 61/100 with 3 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 AECOM (ACM), the current Shiller PE Ratio is 48.34 as of Sep. 01, 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 AECOM (ACM) Overvalued in 2026?
Based on GuruFocus' analysis, AECOM stock appears to be undervalued.
The current stock price of $66.23 is trading 35% below its estimated GF Value™ of $101.86.
GuruFocus considers AECOM to be Significantly Undervalued.
Key valuation signals for ACM:
Shiller PE Ratio: 48.34 (35% below median its 10-year median of 74.55)
GF Value™: $101.86 vs. price of $66.23 (35% below fair value)
Industry Position: 184.8% above the Construction median (#891 of 1038)
No single metric tells the full story. See the ACM stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Aecom is one of the largest global providers of advisory, design, and engineering services. It serves a broad spectrum of end markets, including water, transportation, and environment. Based in Dallas, Aecom employs 51,000 people. The company generated $16.1 billion in sales in fiscal 2025.
61GF Score
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