HF Sinclair Corporation (DINO)
Refiner with lubricants and pipelines, 83% U.S. Read October 20, 2026 from the annual report for the period ending December 31, 2025, filed February 27, 2026. Ranked 5 of the 38 Energy companies read so far, by the share within reach now.
Within reach now
23%
End of 2028
38%
Employees, annual report
5,165
Leading staffing pattern
Petroleum and Coal Products Manufacturing
Share of the working time within reach, long-run pace, four times in five
- Now23%
- End of 202734%
- End of 202838%
- End of 203040%
What changes for its people by the end of 2028, by its industries' figures
- Stays with people 61%
- Becomes checking a model's work 32%
- Handed over with lighter checks 5%
The filing states 5,165 employees by country and 1,588 union members, in refining, lubricants and midstream segments with nothing by segment, so the split is by description.
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: 23% now, 34% at the end of 2027, 38% at the end of 2028, 40% at the end of 2030. By the patterns, the work is about 40% desk work, 11% people work and 48% 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 61% of the working time stays with people (conversation, in-person and hands-on work), 32% 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
5,165 employees as of December 31, 2025 (stated). The filing states 4,301 of 5,165 employees in the United States, 656 in Canada and 208 in Europe.
The filing: “As of December 31, 2025, we had 5,165 employees located in the following geographies: 4,301 employees in the United States, 656 employees in Canada and 208 employees in Europe.”
The workforce as industry patterns
| Pattern | Share | Reason, from the filing |
|---|---|---|
| Petroleum and Coal Products Manufacturing | 92% | By description (c): the refining, renewables, lubricants and specialty products and marketing segments run refineries and lubricant plants, the Canadian and European employees being in lubricants; no count by segment. |
| Other Pipeline Transportation | 8% | By description (c): the midstream segment runs refined product and crude pipelines and terminals, a small part of revenue; no count by segment. |
What the filing says about the workforce: 5,165 employees: 4,301 in the United States, 656 in Canada and 208 in Europe; 1,588 covered by collective bargaining agreements expiring between 2026 and 2030.
Companies read with the same leading pattern
Other companies whose largest staffing pattern is also Petroleum and Coal Products Manufacturing, largest first, each read from its own annual report. Within reach now and at the end of 2028, long-run pace, four in five.
- Marathon Petroleum Corporation (MPC, 18,500 employees)22% now, 40% by 2028
- Phillips 66 (PSX, 12,600 employees)23% now, 39% by 2028
- Valero Energy Corporation (VLO, 9,811 employees)22% now, 39% by 2028
What the filing says about AI
5 sentences in the filing name AI. The filing names AI among cyber threats, says its vendors increasingly offer AI-powered platforms, and says it advises employees and contractors not to provide confidential information to AI models.
- “Emerging artificial intelligence ("AI") technologies may improve or expand the capabilities of malicious third parties in a way we cannot predict at this time, including being used to develop new hacking tools, exploit vulnerabilities, use phishing to trick employees into making payments or granting access to internal systems, obscure malicious activities, and increase the difficulty of detecti...”
- “Our service providers and vendors are also increasingly using and offering platforms powered by AI.”
- “While we advise our employees and contractors to refrain from providing confidential or sensitive information to any AI models or AI-powered platforms and endeavor to limit our vendors' processing of any confidential or sensitive information in an AI model, we cannot predict how an AI model will process our data or if it will inadvertently provide our data to a third-party in its outputs.”
- “Any input of our confidential or sensitive data into an AI model could result in inadvertent disclosure of this data at any time to an unknown third-party, which could subject us to litigation or regulatory actions or cause us to breach our contractual obligations.”
- “Our data protection obligations may also change as the regulatory environment governing use and development of AI technologies changes.”
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
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 | 5,165 | 2026-02-27 | 10-K |
| 2024-12-31 | 5,297 | 2025-02-20 | 10-K |
| 2023-12-31 | 5,218 | 2024-02-21 | 10-K |
| 2022-12-31 | 5,223 | 2023-02-28 | 10-K |
Limits of this reading
- No count by segment; the pipeline share is by description.
Source: the company's annual report on EDGAR, accession 0001915657-26-000016, 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 HF Sinclair 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 HF Sinclair Corporation's working time is within reach of AI?
- An estimated 23% now and 38% by the end of 2028, on METR's long-run pace at four in five, from the workforce HF Sinclair 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 HF Sinclair Corporation employ?
- 5,165 as of December 31, 2025, as its annual report for the period ending December 31, 2025 states. About 83% in the U.S.
- What kinds of work make up HF Sinclair 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 40% desk work, 11% people work and 48% body work. Each share has a one-sentence reason on this page that can be checked against the filing.
- What does HF Sinclair Corporation's annual report say about AI?
- 5 sentences in the filing name AI. Its annual reports for fiscal 2022 to 2025 name it in 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 20, 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.