Company lists · Data refreshed September 2026

Top 25 Petrochemical refineries based in the United States

Name: Petrochemical refineries based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 187 companies tracked

RevenueBase identified 187 petrochemical refineries headquartered in the United States as of September 2026 and tracks 57,735 professional contacts across them, including 16,215 with verified work emails. Houston is the largest hub.

This list covers petrochemical refineries 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 17, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

187Companies

57,735Contacts tracked

16,215Verified emails

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The 25 largest petrochemical refineries based in the United States

Ranked by team size

Top 25 of 187 petrochemical refineries based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to petrochemical refineries: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Marathon Petroleum Corporation	Indirect evidence	Findlay, OH, United StatesHQ checked Sep 17, 2026	10001+	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 17, 2026
2	Valero	Partial evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	10001+	9,405 contacts →
	Partial evidence “Valero is an international manufacturer and marketer of transportation fuels and petrochemical products.” Source: RevenueBase Database · checked Sep 17, 2026
3	Hess Corporation	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	1,001-5,000	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 17, 2026
4	Chevron Phillips Chemical Company	Indirect evidence	Spring, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,580 contacts →
	Indirect evidence “Chevron Phillips Chemical is one of the world’s top chemical manufacturers of olefins and polyolefins and a leading supplier of aromatics, alpha olefins, styrenics, specialty…” Source: RevenueBase Database · checked Sep 17, 2026
5	CITGO	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	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 17, 2026
6	Flint Hills Resources	Indirect evidence	Wichita, KS, United StatesHQ checked Sep 17, 2026	1,001-5,000	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 17, 2026
7	Motiva Enterprises LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,668 contacts →
	Indirect evidence “Headquartered in Houston, Texas, Motiva refines, distributes and markets petroleum products throughout the Americas.” Source: RevenueBase Database · checked Sep 17, 2026
8	Formosa Plastics Corporation, U.S.A	Indirect evidence	Livingston Township, NJ, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,068 contacts →
	Indirect evidence “Founded in 1978, Formosa Plastics Corporation, U.S.A.” Source: RevenueBase Database · checked Sep 17, 2026
9	HF Sinclair	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	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 17, 2026
10	Tesoro Corporation	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	1,795 contacts →
	Indirect evidence “Tesoro has acquired Western Refining and adopted a new name, Andeavor.” Source: RevenueBase Database · checked Sep 17, 2026
11	Delek US	Indirect evidence	Brentwood, TN, United StatesHQ checked Sep 17, 2026	1,001-5,000	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 17, 2026
12	OXBOW	Indirect evidence	West Palm Beach, FL, United StatesHQ checked Sep 17, 2026	501-1,000	487 contacts →
	Indirect evidence “Founded in 1983 by principal shareholder William I.” Source: RevenueBase Database · checked Sep 17, 2026
13	The Stronghold Companies	Partial evidence	La Porte, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	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 17, 2026
14	United Refining Company	Indirect evidence	Warren, United StatesHQ checked Sep 17, 2026	1,001-5,000	401 contacts →
	Indirect evidence “United Refining Company is an independent refiner and marketer of petroleum products.” Source: RevenueBase Database · checked Sep 17, 2026
15	Ineos Olefins & Polymers Usa, LLC	Partial evidence	League City, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	250 contacts →
	Partial evidence “INEOS is a global manufacturer of petrochemicals, specialty chemicals and oil products.” Source: RevenueBase Database · checked Sep 17, 2026
16	Intercontinental Terminals Company, LLC	Partial evidence	La Porte, TX, United StatesHQ checked Sep 17, 2026	201-500	232 contacts →
	Partial evidence “Intercontinental Terminals Company has provided safe and reliable terminal services to the petrochemical industry for four decades.” Source: RevenueBase Database · checked Sep 17, 2026
17	Toledo Refining Company LLC	Indirect evidence	Oregon, OH, United StatesHQ checked Sep 17, 2026	501-1,000	167 contacts →
	Indirect evidence “The Toledo refinery has a throughput capacity of approximately bpd and a Nelson complexity rating of 9.2.” Source: RevenueBase Database · checked Sep 17, 2026
18	BIG West Oil, LLC	Indirect evidence	North Salt Lake, UT, United StatesHQ checked Sep 17, 2026	201-500	165 contacts →
	Indirect evidence “Located in North Salt Lake City, Utah, is a complex high-conversion refinery operated by Big West Oil LLC, a wholly owned subsidiary of FJ Management Inc.” Source: RevenueBase Database · checked Sep 17, 2026
19	GRSA	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 17, 2026	51-200	151 contacts →
	Partial evidence “GRSA is a full service professional engineering company providing process and detailed engineering services for a broad range of upstream, midstream, and downstream petrochemical…” Source: RevenueBase Database · checked Sep 17, 2026
20	Placid Refining Company LLC	Indirect evidence	Port Allen, LA, United StatesHQ checked Sep 17, 2026	201-500	150 contacts →
	Indirect evidence “Semi-complex crude oil refinery in Port Allen, Louisiana, across the river from Baton Rouge.” Source: RevenueBase Database · checked Sep 17, 2026
21	Kern Energy CA	Indirect evidence	Bakersfield, CA, United StatesHQ checked Sep 17, 2026	51-200	127 contacts →
	Indirect evidence “Kern Energy is an independent family-owned and operated refinery producing “California Clean” transportation fuels.” Source: RevenueBase Database · checked Sep 17, 2026
22	Ineos Oligomers	Partial evidence	League City, TX, United StatesHQ checked Sep 17, 2026	501-1,000	126 contacts →
	Partial evidence “INEOS is a global manufacturer of petrochemicals, specialty chemicals and oil products.” Source: RevenueBase Database · checked Sep 17, 2026
23	Calcasieu Refining Company	Indirect evidence	Lake Charles, LA, United StatesHQ checked Sep 17, 2026	51-200	98 contacts →
	Indirect evidence “Calcasieu Refining Co is an oil & energy company based out of 4359 W Tank Farm Rd, Lake Charles, LA, United States.” Source: RevenueBase Database · checked Sep 17, 2026
24	Lotte Chemical USA Corporation	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	201-500	89 contacts →
	Partial evidence “Lotte Chemical USA Corporation, through its subsidiaries LACC and LCLA, is a producer and distributor of petrochemicals.” Source: RevenueBase Database · checked Sep 17, 2026
25	American Fuel & Petrochemical Manufacturers Afpm	Indirect evidence	Washington, DC, United StatesHQ checked Sep 17, 2026	51-200	80 contacts →
	Indirect evidence “AFPM is a trade association representing high-tech American manufacturers of virtually the entire U.S.” Source: RevenueBase Database · checked Sep 17, 2026

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: petrochemical refineries. 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 petrochemical refineries.
Partial evidence: Its own public description names part of petrochemical refineries, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name petrochemical refineries. 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 187 petrochemical refineries based in the United States

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Petrochemical refineries based in the United States at a glance

As of Sep 17, 2026

28.1%Verified-email coverage

308.7Average contacts per company

11-50Median size (employees)

20.9%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 187 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 petrochemical refineries, 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 “petrochemical refineries”. 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 petrochemical refineries), 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 petrochemical refineries, 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, 16,215 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 17, 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.

Petrochemical refineries by metro

Petrochemical refineries in Houston39

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 petrochemical refineries, 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 petrochemical refineries are there based in the United States?

RevenueBase identified 187 petrochemical refineries 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 petrochemical refineries?

Houston leads with 39 headquartered companies, followed by The Woodlands (7) and San Ramon (5).

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 16,215 verified decision-maker contacts tracked across these 187 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 17, 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.