Marathon Petroleum

MPC on NYSE. Marathon Petroleum refines crude oil into fuels and sells them to drivers and businesses. Market value $121.7bn.

Watch this stockFree. We tell you when something changes.

Price checks use the past 12 months to June 2026. Quality checks use five annual reports, the latest for the year to December 2025.

Should I look at this?

Worth a closer look

Read what could go wrong

This is not advice. Check the numbers below.

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Cash yield
past 12 months to June 2026
10.6%very high

For every $100 of what the whole company costs, it produced $10.60 of spare cash in the past 12 months. A savings account pays about $4.

Price to profit
past 12 months to June 2026
10.4×fair

You pay 10.4 years of operating profit for the business. The average large US company costs around 18.

Return on capital
five annual reports to December 2025
14.0%five-year median

Each dollar kept in the business earns 14 cents a year. Above 10 is good.

Quality score: 77 of 100. Price score: 100 of 100. Our list needs 70 on quality and 60 on price.

$433.47 a share, 168% above its 1-year low

Over the past year the price has ranged from $161.93 to $437.67.

Dividend: 0.9% a year

Paid every year for at least 5 years

Prices from Monday’s close (5 October).

Five years of cash, in billions

2.9
13.9
12.2
6.1
4.8
12.9
2021202220232024202512 monthsto Jun '26

Spare cash swings from quarter to quarter here: $12.9 billion in the past 12 months, $4.8 billion in the year to December 2025.

Revenue
$120.0bn$177.5bn$148.4bn$138.9bn$132.7bn
Operating margin
3.6%12.1%9.8%4.9%6.2%
Debt to equity
0.990.981.131.571.92
Shares outstanding
0.47bn0.38bn0.32bn0.30bn0.28bn

Health checks

  • Free cash flow positive5 of 5 years
  • Accounting looks honest (Beneish)Nothing unusual
  • Financial strength (Piotroski)6 of 8 checks we could run
  • Profit backed by cash (accruals)Yes
  • Debt1.92× equity
  • Revenue growth, five yearsStrong, 13.7% a year
  • Buying back its own sharesYes, 40% fewer since 2021

The quarter to June 2026

How the business did, compared with the same quarter a year earlier.

  • Sales: $52 billion last quarter, up 54% on a year ago.
  • Profit: $5.1 billion, up 323% on a year ago.
  • It keeps 9 cents of each $1 of sales as operating profit, up from 4 cents a year earlier.
  • Spare cash over the past 12 months: $12.9 billion, up from $3.6 billion.
  • 6% fewer shares than a year ago. Each share owns a bit more of the company.
  • Debt is $25.5 billion more than cash, down from $27.3 billion a year ago.
  • Sales grew on a year ago in 2 of the last 4 quarters.
Sales by quarter
Sales by quarter
Quarter toAmount
September 2024$35.1bn
December 2024$33.1bn
March 2025$31.5bn
June 2025$33.8bn
September 2025$34.8bn
December 2025$32.6bn
March 2026$34.2bn
June 2026$52.0bn
Profit by quarter
Profit by quarter
Quarter toAmount
September 2024$622m
December 2024$371m
March 2025-$74m
June 2025$1.2bn
September 2025$1.4bn
December 2025$1.5bn
March 2026$511m
June 2026$5.1bn

From the company's quarterly reports to the SEC.

Dates

Next results (estimated)
3 November 2026
Last annual report (10-K)
26 February 2026
Next quarterly (estimated, 10-Q)
3 November 2026

Who owns it

12 long-term investors we follow own it, unchanged from 12 last quarter. 1,945 funds in all.

Jun '25
Dec '25
Jun '26
Largest holders overall

From 13F filings for the quarter ended 30 June 2026.

Big holders and activists

3 investors own more than 5%.

From Schedule 13D and 13G filings: anyone owning more than 5% must file one.

What insiders did

No insider bought shares on the open market in the last 12 months. 5 sold $14m, $6m of it under preset trading plans.

  • Lyon Shawn M
    SVP Log & Storage, MPLX GP LLC
    Sold
    Date
    31 August 2026
    Shares
    1,000
    Price
    $375.75
    Value
    $375,750
  • Lyon Shawn M
    SVP Log & Storage, MPLX GP LLC
    Sold
    Date
    28 August 2026
    Shares
    425
    Price
    $368.51
    Value
    $156,617
  • Brzezinski Erin M
    VP and Controller
    Sold
    Date
    27 August 2026
    Shares
    570
    Price
    $362.79
    Value
    $206,790
  • Benson Molly R
    Chief Legal Ofc & Corp Sec
    Sold
    under a preset trading plan
    Date
    17 August 2026
    Shares
    17,196
    Price
    $358.57
    Value
    $6m
  • Lyon Shawn M
    SVP Log & Storage, MPLX GP LLC
    Sold
    Date
    13 August 2026
    Shares
    2,500
    Price
    $350.00
    Value
    $875,000
  • Henschen Michael A II
    Ex VP, Refining
    Sold
    Date
    12 August 2026
    Shares
    6,011
    Price
    $341.56
    Value
    $2m
  • Henschen Michael A II
    Ex VP, Refining
    Sold
    Date
    4 June 2026
    Shares
    6,336
    Price
    $268.83
    Value
    $2m
  • Hessling Ricky D.
    Chief Commercial Officer
    Sold
    Date
    13 May 2026
    Shares
    1,000
    Price
    $250.00
    Value
    $250,000
  • Hessling Ricky D.
    Chief Commercial Officer
    Sold
    Date
    13 March 2026
    Shares
    1,626
    Price
    $228.18
    Value
    $371,021
  • Hessling Ricky D.
    Chief Commercial Officer
    Sold
    Date
    12 March 2026
    Shares
    1,037
    Price
    $229.08
    Value
    $237,554

From Form 4 filings: insiders must report trades in their own company's shares within two days.

Warning signs in its filings

Problems the company itself reported to the SEC, in its own words.

None of the warning signs we check for were found.

We look for five warning signs: doubt it can keep going, weak checks on its own accounts, a notice that its past accounts can't be relied on, a change of auditor, and one customer bringing in a big share of sales. We don't check lawsuits, investigations or debt yet.

We checked the auditor's report, internal controls, restatement notices, auditor changes and big customers in the 10-K filed 26 Feb 2026, plus the 10-Q filed 4 Aug 2026 and 5 later 8-Ks.

A 10-K is the yearly report every US company files with the SEC. An 8-K is a short notice of a big event.

What could go wrong

Cheap for a reason is the question the numbers cannot answer.

Whether the price already reflects the risks is what the deep dive is for.

What changed in the risks this year

Companies must list what could hurt them each year. These are the parts that changed since last year’s report.

  • We expect to continue to incur substantial capital expenditures and operating costs to meet the requirements of evolving environmental and other laws or regulations. Changes to the federal government’s policies and operations could lead to increased regulatory uncertainty and volatility and increased state regulation, which may impact our business, financial condition and results of operations.

    Could happen
    In 2025, the U.S. presidential administration announced wide-ranging policy changes and issued numerous executive actions. The U.S. EPA and other federal agencies began proposing and promulgating regulations consistent with the administration’s policy changes. If the federal government relaxes or revokes certain environmental regulations, states may pass laws that vary in stringency and scope by state, creating a patchwork of regulation. For example, various states have passed laws regulating the use of materials containing PFAS and setting action levels for the remediation of certain PFAS. We cannot predict the extent to which states will pass such legislation, or the ultimate effect these state laws will have on our business, financial condition and results of operations.
    Read more
  • Industry, market, technological and regulatory developments regarding emissions, fuel efficiency and alternative fuel vehicles may decrease demand for liquid transportation fuels.

    Could happen
    Developments aimed at reducing vehicle emissions, increasing vehicle efficiency or reducing the sale of new internal combustion engine vehicles may decrease the demand and may increase the cost for our liquid transportation fuels. Government mandates or incentives, industry and technological developments and consumer sentiment with respect to liquid transportation fuels may alter fuels or energy preferences or make alternative fuel vehicles more desirable and result in greater market penetration of such vehicles or otherwise decrease demand for our liquid transportation fuels. For example, the federal government through NHTSA and the EPA promulgate rules that require vehicle manufacturers to increase the fuel efficiency standards of liquid transportation fuels vehicles. The EPA has finalized a rule that reduces its current vehicle standards by eliminating regulation of GHG emissions. The new, reduced standards have been challenged in court.
    Read more
  • Climate change and GHG emission regulation could affect our operations, energy consumption patterns and regulatory obligations, any of which could adversely impact our business, results of operations and financial condition.

    Could happen
    California has also enacted cap-and-invest programs, which set statewide limits on GHG emissions and caps that decline each year. CARB is currently developing regulations to implement the changes to the Cap-and-Invest program. We are unable to estimate the impact of these programs but requirements to drastically reduce GHG emissions in California could increase our operating costs, require additional capital expenditures, reduce the competitiveness of our California refinery and renewable fuel facility and our Washington refinery and affect their long term outlook.
    Read more
  • Significant acquisitions, including the Northwind Midstream Acquisition and the BANGL Acquisition, will involve the integration of new assets or businesses and may present substantial risks that could adversely affect our business, financial conditions, results of operations and cash flows.

    Could happen
    Significant acquisitions, including the Northwind Midstream Acquisition and the BANGL Acquisition, involving the addition of new assets or businesses will present risks, which may include, among others:

Read it in the annual report

The deep dive

Everything above is arithmetic on public filings. The deep dive reads the last ten years of annual reports, the proxy statements, and the earnings calls, then argues the case the way Buffett, Klarman, and Hohn would, and checks every claim against the source.

  • What the business is worth, as a range, and the margin of safety at today’s price
  • Prices to start buying, buy, and buy hard
  • The three things that would make this a mistake
  • Every number footnoted to the filing it came from
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What a finished deep dive looks like

Not advice. Numbers on this page come from SEC filings and are updated each night; prices are updated again after the US market closes. The five-year figures are rounded.