Marathon Petroleum (MPC) is back in focus after a busy start to May, including first quarter 2026 earnings, an increased share repurchase authorization, and new commentary from Goldman Sachs on the company’s execution and capital returns.

The steady stream of news in early May, from first quarter 2026 results and a larger buyback authorization to fresh Goldman Sachs commentary and new leadership appointments, has arrived alongside strong share price momentum. The company has reported a 30 day share price return of 11.12%, a year to date share price return of 50.67%, and a five year total shareholder return of 367.73% at a share price of US$248.82, suggesting investors are currently rewarding the company’s execution and capital return profile.

If you are looking beyond refiners and want to see how other energy related plays are being priced, this is a good time to scan 39 power grid technology and infrastructure stocks

With first quarter 2026 earnings back in the black, an expanded buyback program and a share price that has surged more than 50% in 2026, the key question now is whether Marathon Petroleum still offers value or if the market is already pricing in future growth.

Most Popular Narrative: 3.1% Undervalued

Against the last close of $248.82, the most followed narrative points to a fair value of $256.83, framing Marathon Petroleum as modestly undervalued based on discounted future cash flows.

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, aligning with positive long-term company trends.

Curious what earnings path supports that valuation, how margins are expected to shift, and which profit multiple underpins the 2029 view? The full narrative lays out the revenue line, margin rebuild, and buyback assumptions that sit behind the model, as well as how a lower future P/E still gets to that fair value.

Result: Fair Value of $256.83 (UNDERVALUED)

However, this hinges on refined product demand and carbon policy, and faster electrification or tougher regulation could pressure volumes, margins, and future earnings power.

Another View: Market Multiple Signals Less Obvious Value

While the SWS DCF model points to Marathon Petroleum trading at a large discount to an estimated future cash flow value of $425.13, the P/E tells a cooler story. At 15.7x, the stock sits a touch above both peers at 15.5x and the wider US Oil and Gas industry at 14.5x, even though the fair ratio is 21.6x. This raises the question of whether this is a classic value gap or the market already baking in plenty of optimism.

Next Steps

With mixed signals on value and sentiment running both hot and cold, now is a good time to look through the underlying data yourself and decide where you stand. To get a clearer picture of what could go right or wrong from here, review the 3 key rewards and 3 important warning signs.

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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.