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WilliamsMEX:WMB 72 Shiller PE Ratio is 45.07 as of Sep. 05, 2026, which is 20% above its 10-year median of 37.60. GuruFocus rates MEX:WMB with a GF Score™ of 72/100 and a GF Value™ of MXN1,073.50 (Modestly Overvalued). The stock has 10 warning signs investors should review. Among 437 Oil & Gas companies, Williams ranks worse than 85.58% on this metric.
As of today (2026-09-05), Williams's current share price is MXN1258.00. Williams's E10 for the quarter that ended in Jun. 2026 was MXN27.91. Williams's Shiller PE Ratio for today is 45.07.
The historical rank and industry rank for Williams's Shiller PE Ratio or its related term are showing as below:
MEX:WMB'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 19.88 Med: 37.6 Max: 57.36
Current: 44.74
During the past years, Williams's highest Shiller PE Ratio was 57.36. The lowest was 19.88. And the median was 37.60.
MEX:WMB's Shiller PE Ratio is ranked worse than 85.58% of 437
companies
in the Oil & Gas industry
Industry Median: 18.22
vs MEX:WMB: 44.74
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.
Williams's adjusted earnings per share data for the three months ended in Jun. 2026 was MXN11.865. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is MXN27.91 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.
Williams Shiller PE Ratio Related Terms
Williams Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for Williams'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.
MEX:WMB vs EPD, ET, KMI: Shiller PE Ratio Comparison
For the Oil & Gas Midstream subindustry, Williams'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.
Williams Shiller PE Ratio vs Oil & Gas Industry
For the Oil & Gas industry and Energy sector, Williams's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Williams'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.
Williams'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.
Williams's E10 for the quarter that ended in Jun. 2026 is calculated as:
For example, Williams'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.
Williams (MEX:WMB) has a Shiller PE Ratio of 45.07 as of Sep. 05, 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 Williams and its competitors. This is 20% above median its historical median of 37.60. Over the past decade, Williams' Shiller PE Ratio has ranged from 19.88 to 57.36. According to the industry distribution chart, Williams ranks #374 out of 437 companies in the Oil & Gas industry, placing it in the top 85.6%.
Is Williams' Shiller PE Ratio too high?
Williams' current Shiller PE Ratio of 45.07 is 20% above median its 10-year median of 37.60. Over the past 10 years, this metric has ranged from a low of 19.88 to a high of 57.36. The Oil & Gas industry median Shiller PE Ratio is 18.22. Williams' value of 45.07 is 147.4% above this industry median. Based on the distribution chart, Williams ranks #374 out of 437 companies in the Oil & Gas industry, which is in the bottom quartile relative to peers. Overall, Williams has a GF Score™ of 72/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Williams' Shiller PE Ratio compare to EPD and ET?
According to the Oil & Gas industry distribution chart, Williams ranks #374 out of 437 companies for Shiller PE Ratio. This places Williams in the lower half of its industry. The industry median Shiller PE Ratio is 18.22. Williams' value of 45.07 is 147.4% above this benchmark. Historically, Williams' own Shiller PE Ratio has ranged from 19.88 to 57.36 over the past decade. While the company's 10-year median is 37.60 vs. the industry median of 18.22, Williams 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 Oil & Gas company?
The median Shiller PE Ratio among Oil & Gas companies is 18.22, based on 437 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. Williams's current Shiller PE Ratio of 45.07 is 147.4% 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 Williams and its competitors. For the Oil & Gas industry, the median Shiller PE Ratio is 18.22 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Williams's current Shiller PE Ratio is 45.07, which is 20% above median its own 10-year median of 37.60. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Williams stock overvalued right now?
Based on GuruFocus' analysis, Williams (MEX:WMB) is currently considered Modestly Overvalued. The stock's GF Value™ is MXN1,073.50, compared to a current price of MXN1,258.00 — trading 17.2% above its estimated fair value. The current Shiller PE Ratio is 45.07, which is 20% above median its 10-year median of 37.60 and 147.4% above the Oil & Gas industry median of 18.22. Williams' overall GF Score™ is 72/100 with 10 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 Williams (MEX:WMB), the current Shiller PE Ratio is 45.07 as of Sep. 05, 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 Williams (MEX:WMB) Overvalued in 2026?
Based on GuruFocus' analysis, Williams stock appears to be overvalued.
The current stock price of MXN1,258.00 is trading 17.2% above its estimated GF Value™ of MXN1,073.50.
GuruFocus considers Williams to be Modestly Overvalued.
Key valuation signals for MEX:WMB:
Shiller PE Ratio: 45.07 (20% above median its 10-year median of 37.60)
GF Value™: MXN1,073.50 vs. price of MXN1,258.00 (17.2% above fair value)
Industry Position: 147.4% above the Oil & Gas median (#374 of 437)
No single metric tells the full story. See the MEX:WMB stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Williams operates the Transco pipeline, which connects the Gulf Coast to the Northeast United States. It has additional natural gas transmission pipelines connecting the Rockies to the Pacific Northwest and midcontinent. At the field level, it operates substantial gathering and processing assets in Appalachia and other basins. The company has also struck several power supply agreements.
72GF Score
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