Company lists · Data refreshed September 2026
Top 25 Refinery operators based in the United States
RevenueBase identified 566 refinery operators headquartered in the United States as of September 2026 and tracks 64,735 professional contacts across them, including 19,577 with verified work emails. Houston is the largest hub.
This list covers refinery operators headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest refinery operators based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 14,238 contacts → | ||||
Indirect evidence “Marathon Petroleum Corporation (MPC) is a leading, integrated, downstream and midstream energy company headquartered in Findlay, Ohio.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 9,405 contacts → | ||||
Indirect evidence “Valero is an international manufacturer and marketer of transportation fuels and petrochemical products.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 4,642 contacts → | ||||
Indirect evidence “Hess Corporation is a global independent energy company engaged in the exploration and production of crude oil and natural gas.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 4,396 contacts → | ||||
Indirect evidence “CITGO Petroleum Corporation is a recognized leader in the refining industry and operates under the well-known CITGO brand.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 2,891 contacts → | ||||
Indirect evidence “Flint Hills Resources is a leading refining company with operations primarily in the Midwest and Texas.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 2,668 contacts → | ||||
Partial evidence “Headquartered in Houston, Texas, Motiva refines, distributes and markets petroleum products throughout the Americas.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 2,026 contacts → | ||||
Indirect evidence “Headquartered in Dallas, Texas, HF Sinclair Corporation is an independent, diversified energy company committed to safely producing products that power the world.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 1,795 contacts → | ||||
Indirect evidence “Tesoro has acquired Western Refining and adopted a new name, Andeavor.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 1,633 contacts → | ||||
Indirect evidence “Our mission is to identify attractive acquisition opportunities in the petroleum refining industry in North America and execute acquisitions that provide superior returns to our…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 1,297 contacts → | ||||
Indirect evidence “Delek US is a diversified downstream energy company with assets in petroleum refining, asphalt, renewable fuels, and logistics.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 1,262 contacts → | ||||
Indirect evidence “FET (Forum Energy Technologies, Inc.) is a global company, serving the crude oil, natural gas, and renewable energy industries.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 707 contacts → | ||||
Indirect evidence “Tesoro acquired Western Refining and adopted a new name, Andeavor.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 665 contacts → | ||||
Indirect evidence “With more than 71 years of experience in the industry, Pilot Thomas Logistics is the premier provider of fuel, lubricants and chemicals to the Energy, Marine, Mining and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 475 contacts → | ||||
Indirect evidence “Turn2 Specialty Companies is the premier provider of specialty turnaround services in the refining, petrochemical, and power industries.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 434 contacts → | ||||
Partial evidence “With decades of refinery, petrochemical, fertilizer and power plant experience, CAM Industrial Solutions has become the standard in heavy industrial maintenance, turnaround and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 419 contacts → | ||||
Partial evidence “As part of the Quanta Services Family of Companies (NYSE: PWR)- Stronghold provides the safest, leanest, most efficient, quality solutions for the refinery, petrochemical and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 401 contacts → | ||||
Partial evidence “United Refining Company is an independent refiner and marketer of petroleum products.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 332 contacts → | ||||
Indirect evidence “In the spring of 2012, the world’s largest commercial consumer of jet fuel made a bold move that gave the airline more control over its supply chain and its single largest expense.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 314 contacts → | ||||
Indirect evidence “CountryMark is an American-owned oil exploration, production, refining and marketing company.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 275 contacts → | ||||
Indirect evidence “AltairStrickland is a specialty mechanical contracting company serving the refining, petrochemical, power and fertilizer industries.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 235 contacts → | ||||
Indirect evidence “Flyers Energy, LLC is one of California’s leading marketers of petroleum and renewable fuel and energy, servicing commercial customers in 20 States.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 233 contacts → | ||||
Indirect evidence “Chemical Engineering Partners (CEP) is a world leader in used oil re-refining designs and process technology.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 229 contacts → | ||||
Indirect evidence “Hunt Refining Company (HRC), an affiliate of Hunt Consolidated, Inc, is based in Tuscaloosa, Alabama.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 202 contacts → | ||||
Partial evidence “Vertex is a leading specialty refiner of base oils and conventional fuels.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 201 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: refinery operators. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names refinery operators.
- Partial evidence
- Its own public description names part of refinery operators, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name refinery operators. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 566 refinery operators based in the United States
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Refinery operators based in the United States at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 566 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among refinery operators, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “refinery operators”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names refinery operators), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among refinery operators, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 19,577 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Refinery operators by metro
- Refinery operators in Houston78
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names refinery operators, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many refinery operators are there based in the United States?
RevenueBase identified 566 refinery operators headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Marathon Petroleum Corporation, headquartered in Findlay, tops this list with the largest team on record.
Which city has the most refinery operators?
Houston leads with 78 headquartered companies, followed by Dallas (8) and San Antonio (7).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 19,577 verified decision-maker contacts tracked across these 566 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.