Marathon Petroleum Corporation (MPC)
Refiner with midstream operations. Read October 19, 2026 from the annual report for the period ending December 31, 2025, filed February 26, 2026. Ranked 1 of the 9 Energy companies read so far, by the share within reach now.
Within reach now
22%
End of 2028
40%
Employees, annual report
18,500
Leading staffing pattern
Petroleum and Coal Products Manufacturing
Share of the working time within reach, long-run pace, four times in five
- Now22%
- End of 202734%
- End of 202840%
- End of 203041%
What changes for its people by the end of 2028, by its industries' figures
- Stays with people 58%
- Becomes checking a model's work 35%
- Handed over with lighter checks 5%
18,500 full-time and part-time employees at refineries and the pipelines and terminals its midstream affiliate operates, split by description since the filing counts no employees by segment.
The figures on this page come from the company's own annual report and from BLS staffing patterns for its industries, never from a roster. They are estimates with a stated method. Nothing here says what the company will do: within reach is not a forecast of jobs lost or of savings.
What follows from the reading
Share of working time within reach of AI, on the long-run pace at four in five: 22% now, 34% at the end of 2027, 40% at the end of 2028, 41% at the end of 2030. By the patterns, the work is about 42% desk work, 12% people work and 47% body work. These are the site's industry estimates weighted by the shares below: estimates with a stated method and range, not a forecast of what the company will do. By the same patterns, at the end of 2028 about 58% of the working time stays with people (conversation, in-person and hands-on work), 35% becomes checking a model's work and 5% could be handed over with lighter checks, from the industries' own figures, not the company's roles.
Headcount
18,500 employees as of December 31, 2025 (stated). The filing counts no employees by country; its refineries and midstream assets are in the United States.
The filing: “Employee Profile As of December 31, 2025, we employed approximately 18,500 people in full-time and part-time roles.”
The workforce as industry patterns
| Pattern | Share | Reason, from the filing |
|---|---|---|
| Petroleum and Coal Products Manufacturing | 75% | Refining and Marketing is 94% of revenue (c) and the filing counts no employees by segment; the refineries take most of the workforce by description, with the renewable diesel plants inside the same pattern. |
| Pipeline Transportation of Crude Oil | 25% | The pipelines, terminals and gathering and processing assets its midstream affiliate MPLX operates (4% of revenue, (c)), staffed by company employees since MPLX has none of its own, read at pipeline transportation by description above the revenue share because pipelines and terminals need people per dollar in a way a refinery's throughput does not. |
What the filing says about the workforce: About 18,500 employees in full-time and part-time roles at December 31, 2025; approximately 3,800 covered by collective bargaining agreements expiring from 2027 to 2031 (21%); all employees eligible for the annual bonus program.
What the filing says about AI
5 sentences in the filing name AI. The filing names AI in five sentences, in its risk factors: advanced artificial intelligence attacks among cybersecurity threats, business, compliance and reputational risks as it integrates artificial intelligence technologies into its processes, and advances in AI and machine learning that present new opportunities and risks.
- “Our information systems (and those of our third-party business partners and service providers), including our cloud computing environments and operational technology environments, are subject to numerous and evolving cybersecurity threats and attacks, including ransomware and other malware, phishing and social engineering schemes, supply chain attacks, and advanced artificial intelligence attac...”
- “As we integrate artificial intelligence technologies into our processes, these technologies may present business, compliance and reputational risks.”
- “Recent and continuously evolving technological advances in artificial intelligence ("AI") and machine-learning technology present new opportunities and also pose new risks.”
- “The utilization of AI could also result in loss of intellectual property and subject us to heightened risks related to intellectual property infringement or misappropriation.”
- “The use of AI can lead to unintended consequences, including generating content that is inaccurate, misleading or otherwise flawed, or that results in unintended biases and discriminatory outcomes, which could harm our reputation and expose us to risks related to inaccuracies or errors in the output of such technologies.”
Its annual reports, year by year
Sentences naming AI in each annual report, counted by one rule, beside the median report in the Index that year. Each count links its filing. Every company, by year and sector
- Fiscal 20210median 0
- Fiscal 20220median 0
- Fiscal 20231median 1
- Fiscal 20245median 4
- Fiscal 20255median 10
Headcount by filing year
As reported in each year's annual report, with the filing. A year marked not read had no figure the reading could take from the report's text.
| Period | Employees | Filed | Filing |
|---|---|---|---|
| 2025-12-31 | 18,500 | 2026-02-26 | 10-K |
| 2024-12-31 | 18,300 | 2025-02-27 | 10-K |
| 2023-12-31 | 18,200 | 2024-02-28 | 10-K |
| 2022-12-31 | 17,800 | 2023-02-23 | 10-K |
| 2021-12-31 | 17,700 | 2022-02-24 | 10-K |
| 2020-12-31 | 57,900 | 2021-02-26 | 10-K |
| 2019-12-31 | 60,910 | 2020-02-28 | 10-K |
| 2018-12-31 | 60,350 | 2019-02-28 | 10-K |
| 2017-12-31 | 43,800 | 2018-02-28 | 10-K |
| 2016-12-31 | 44,460 | 2017-02-24 | 10-K |
| 2015-12-31 | 45,440 | 2016-02-26 | 10-K |
| 2014-12-31 | 45,340 | 2015-02-27 | 10-K |
| 2013-12-31 | 29,865 | 2014-02-28 | 10-K |
| 2012-12-31 | 25,985 | 2013-02-28 | 10-K |
| 2011-12-31 | 24,210 | 2012-02-29 | 10-K |
Limits of this reading
- The filing counts no employees by segment, so the split between refining and midstream is by description (c).
- The headcount includes employees who operate MPLX's assets; MPLX itself has no employees.
Source: the company's annual report on EDGAR, accession 0001510295-26-000009, the filing. Read by Claude Fable 5.1 under rubric version 1, by the method. A company can write to info@stratussc.com to have its reading checked against its filing.
The report on Marathon Petroleum Corporation, $29
This page as a document to keep, with what it does not show: the share within reach at every date on three paces and two reliabilities, a typical workforce of this shape at the stated headcount role by role and task by task (the industries' staffing, never the company's roster), where to start, what changes for the people and what they would learn, every sentence in the filing that names AI, the headcount by year, the companies read with the same leading pattern, the method and a citation line. To print or save as a PDF, open again in your browser for a year.
See the report, $29See the sample first: Walmart's report is free
Questions about this company
- How much of Marathon Petroleum Corporation's working time is within reach of AI?
- An estimated 22% now and 40% by the end of 2028, on METR's long-run pace at four in five, from the workforce Marathon Petroleum Corporation's own annual report describes and BLS staffing patterns for its industries, never from a roster. It is an estimate with a stated method. It is not a forecast of jobs lost or of savings, and it says nothing about what the company will do.
- How many people does Marathon Petroleum Corporation employ?
- 18,500 as of December 31, 2025, as its annual report for the period ending December 31, 2025 states.
- What kinds of work make up Marathon Petroleum Corporation's workforce?
- Read from its annual report as a blend of 2 industry staffing patterns, the largest Petroleum and Coal Products Manufacturing; by those patterns the work is about 42% desk work, 12% people work and 47% body work. Each share has a one-sentence reason on this page that can be checked against the filing.
- What does Marathon Petroleum Corporation's annual report say about AI?
- 5 sentences in the filing name AI. Its annual reports for fiscal 2021 to 2025 name it in 0, 0, 1, 5 and 5 sentences, year by year. They are counted and quoted on this page, never judged: a count says how much a filing talks about AI, not what the company does with it.
- How is this estimated?
- Claude Fable 5.1 read the annual report under the Index's written rubric (version 1) on October 19, 2026: the stated headcount, the share in the U.S. when stated, and the workforce as a blend of industry staffing patterns. The estimates are the site's industry estimates weighted by those shares, from O*NET tasks with estimated lengths and METR's measurements of how long a task AI models can finish. A company can write to info@stratussc.com to have its reading checked against its filing.
Embed these figures on your site
A small card with the share of working time within reach now and at the end of 2027, 2028 and 2030, the date and a link back. Free under CC BY 4.0; the card carries the credit.