After a very strong run over the past five years, Marathon Petroleum is trading around US$297.75. The intrinsic value estimate based on a Discounted Cash Flow (DCF) approach still points to meaningful upside, and the broader valuation checks also lean cheap.

• Marathon Petroleum has delivered a very large 5 year return of 466.9%, which makes the current valuation especially important for anyone considering new capital or thinking about taking profits.
• Recent profit growth driven by wider refining margins and higher throughput can support expectations for cash flow, while higher growth capital spending may add execution risk if future returns on that investment fall short of expectations.
• The stock screens as undervalued in 5 of 6 checks on Simply Wall St, which suggests the broader metrics currently point to Marathon Petroleum looking cheap on fundamentals relative to its recent share price performance.

For investors, the debate is whether Marathon Petroleum's current price still leaves enough margin between market value and intrinsic value to justify the recent gains.

Is Marathon Petroleum a Bargain on Cash Flow?

The Discounted Cash Flow (DCF) model estimates what Marathon Petroleum is worth based on the cash it can return to shareholders over time. For Marathon Petroleum, the model uses the latest twelve month free cash flow of about $13.9b and assumes cash flows ease back from recent levels rather than compound aggressively higher.

Using those inputs, the DCF model points to an estimated intrinsic value of about $401 per share, compared with the current price around $297.75. On this basis, the stock appears 25.8% undervalued within this cash flow framework. Because second quarter 2026 profit was lifted by very strong refining margins, the model effectively treats that strength as hard to repeat in full. This helps explain why the valuation still appears conservative relative to the recent results.

Overall, the DCF analysis suggests Marathon Petroleum stock currently looks undervalued relative to the cash flows analysts expect it to generate.

Our Discounted Cash Flow (DCF) analysis suggests Marathon Petroleum is undervalued by 25.8%. Track this in your watchlist or portfolio, or discover 51 more high quality undervalued stocks.

Does Marathon Petroleum Look Undervalued on Earnings?

The P/E ratio is a useful cross check for Marathon Petroleum because earnings matter directly for shareholder returns in this kind of cyclic refining business. Marathon Petroleum currently trades on a P/E of about 9.8x, compared with an Oil and Gas industry average of roughly 13.1x and a peer group average of about 11.5x. On raw comparisons, the stock sits at a discount to both the wider industry and closer listed peers.

A more tailored fair P/E, which accounts for factors such as the company’s scale, profitability profile and risk, is about 12.8x. That figure is several turns above the current 9.8x multiple. The gap indicates that the market is valuing Marathon Petroleum below what this framework implies, even after the strong profit performance reported for 2026 so far.

On the P/E multiple alone, Marathon Petroleum stock appears undervalued relative to both sector benchmarks and its modelled fair ratio.

The Marathon Petroleum Narrative: What Would Justify Today's Price?

Simply Wall St Narratives for Marathon Petroleum extend the valuation work you have just seen by spelling out which assumptions about Marathon Petroleum's future growth, margins and earnings would need to hold for the stock to be worth materially more or less than today's price, and they sit on Simply Wall St's Community page. Where a single ratio or model gives one number, Narratives lay out the specific future that number relies on so you can watch how reality compares over time.

One of the top community narratives on Marathon Petroleum: roughly fairly valued

"Disciplined capital allocation through continued share buybacks, increasing MPLX distributions, and maintenance of an investment-grade balance sheet are set to drive higher earnings per share and sustained shareholder returns..."

Do you think there's more to the story for Marathon Petroleum? Head over to our Community to see what others are saying!

The Bottom Line

The Discounted Cash Flow (DCF) intrinsic value estimate and the earnings multiple view both point to Marathon Petroleum looking undervalued, even after a very large 5 year return. That alignment, supported by broader valuation checks, indicates that the current price still embeds a discount to the cash flows and earnings profile implied by recent results.

The key question from here is whether Marathon Petroleum can continue turning its refining margin profile and higher growth capital spending into solid, repeatable cash flows. The outcome of that will determine whether today’s discount reflects an opportunity or the market accurately pricing execution risk.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.