Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.
Marathon PetroleumMEX:MPC -0.54%59 Shiller PE Ratio is 27.60 as of Aug. 16, 2026, which is 59% above its 10-year median of 17.40. GuruFocus rates MEX:MPC with a GF Score™ of 59/100 and a GF Value™ of MXN4,007.08 (Significantly Overvalued). The stock has 5 warning signs investors should review. Among 440 Oil & Gas companies, Marathon Petroleum ranks worse than 73.18% on this metric.
The historical rank and industry rank for Marathon Petroleum's Shiller PE Ratio or its related term are showing as below:
MEX:MPC'
s Shiller PE Ratio Range Over the Past 10 Years
Min: 4.37 Med: 17.4 Max: 28.94
Current: 28.94
During the past years, Marathon Petroleum's highest Shiller PE Ratio was 28.94. The lowest was 4.37. And the median was 17.40.
MEX:MPC's Shiller PE Ratio is ranked worse than 73.18% of 440
companies
in the Oil & Gas industry
Industry Median: 17.73
vs MEX:MPC: 28.94
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.
Marathon Petroleum's adjusted earnings per share data for the three months ended in Jun. 2026 was MXN309.371. Add all the adjusted EPS for the past 10 years together and divide 10 will get our E10, which is MXN215.95 for the trailing ten years ended in Jun. 2026.
Shiller PE for Stocks: The True Measure of Stock Valuation
Marathon Petroleum (MEX:MPC) Shiller PE Ratio Explanation
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.
Marathon Petroleum Shiller PE Ratio Related Terms
Marathon Petroleum Shiller PE Ratio Historical Data
* Premium members only.
The historical data trend for Marathon Petroleum'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:MPC vs VLO, PSX, DINO: Shiller PE Ratio Comparison
For the Oil & Gas Refining & Marketing subindustry, Marathon Petroleum'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.
Marathon Petroleum Shiller PE Ratio vs Oil & Gas Industry
For the Oil & Gas industry and Energy sector, Marathon Petroleum's Shiller PE Ratio distribution charts can be found below:
* The bar in red indicates where Marathon Petroleum'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.
* 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.
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.
Marathon Petroleum (MEX:MPC) has a Shiller PE Ratio of 27.60 as of Aug. 16, 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 Marathon Petroleum and its competitors. This is 59% above median its historical median of 17.40. Over the past decade, Marathon Petroleum's Shiller PE Ratio has ranged from 4.37 to 28.94. According to the industry distribution chart, Marathon Petroleum ranks #322 out of 440 companies in the Oil & Gas industry, placing it in the top 73.2%.
Is Marathon Petroleum's Shiller PE Ratio too high?
Marathon Petroleum's current Shiller PE Ratio of 27.60 is 59% above median its 10-year median of 17.40. Over the past 10 years, this metric has ranged from a low of 4.37 to a high of 28.94. The Oil & Gas industry median Shiller PE Ratio is 17.73. Marathon Petroleum's value of 27.60 is 55.7% above this industry median. Based on the distribution chart, Marathon Petroleum ranks #322 out of 440 companies in the Oil & Gas industry, which is below the industry midpoint. Overall, Marathon Petroleum has a GF Score™ of 59/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Marathon Petroleum's Shiller PE Ratio compare to VLO and PSX?
According to the Oil & Gas industry distribution chart, Marathon Petroleum ranks #322 out of 440 companies for Shiller PE Ratio. This places Marathon Petroleum in the lower half of its industry. The industry median Shiller PE Ratio is 17.73. Marathon Petroleum's value of 27.60 is 55.7% above this benchmark. Historically, Marathon Petroleum's own Shiller PE Ratio has ranged from 4.37 to 28.94 over the past decade. While the company's 10-year median is 17.40 vs. the industry median of 17.73, Marathon Petroleum 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 17.73, based on 440 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. Marathon Petroleum's current Shiller PE Ratio of 27.60 is 55.7% 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 Marathon Petroleum and its competitors. For the Oil & Gas industry, the median Shiller PE Ratio is 17.73 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Marathon Petroleum's current Shiller PE Ratio is 27.60, which is 59% above median its own 10-year median of 17.40. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Marathon Petroleum stock overvalued right now?
Based on GuruFocus' analysis, Marathon Petroleum (MEX:MPC) is currently considered Significantly Overvalued. The stock's GF Value™ is MXN4,007.08, compared to a current price of MXN5,960.00 — trading 48.7% above its estimated fair value. The current Shiller PE Ratio is 27.60, which is 59% above median its 10-year median of 17.40 and 55.7% above the Oil & Gas industry median of 17.73. Marathon Petroleum's overall GF Score™ is 59/100 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 Marathon Petroleum (MEX:MPC), the current Shiller PE Ratio is 27.60 as of Aug. 16, 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 Marathon Petroleum (MEX:MPC) Overvalued in 2026?
Based on GuruFocus' analysis, Marathon Petroleum stock appears to be overvalued.
The current stock price of MXN5,960.00 is trading 48.7% above its estimated GF Value™ of MXN4,007.08.
GuruFocus considers Marathon Petroleum to be Significantly Overvalued.
Key valuation signals for MEX:MPC:
Shiller PE Ratio: 27.60 (59% above median its 10-year median of 17.40)
GF Value™: MXN4,007.08 vs. price of MXN5,960.00 (48.7% above fair value)
Industry Position: 55.7% above the Oil & Gas median (#322 of 440)
No single metric tells the full story. See the MEX:MPC stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.
Marathon Petroleum is a leading integrated downstream and midstream energy company that operates 13 refineries in the Gulf Coast, Mid-Continent, and West Coast regions of the United States with an aggregate crude oil refining capacity of 3.0 million barrels per day. The company is one of the largest producers of renewable diesel in the US; its Dickinson, North Dakota facility has the capacity to produce 184 million gallons per year, and its Martinez, California, joint venture facility (a 50/50 partnership with Neste) reached its full capacity of 730 million gallons per year in late 2024. Marathon also owns the general partner and approximately 64% of MPLX LP, a large-cap master limited partnership that owns and operates midstream energy infrastructure and logistics assets.
59GF Score
Get the complete analysis for MEX:MPC
Shiller PE Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.
Quick Browse
Personalize
Premium Gurus 
Create New Portfolio
MEX:MPC has been successfully added to your 
