Company lists · Data verified August 2026
Top 25 Oil and gas companies in the United States
This directory contains 538 oil and gas companies in the United States, with company information covering 253,083 contacts and 41,710 email addresses. Houston is the single most-represented city among the listed companies, and the directory was published or updated in August 2026.
Oil and gas companies explore for, extract, process, transport, store, refine, or market crude oil, natural gas, and related petroleum products. This list covers companies primarily engaged in oil and gas exploration, production, processing, transportation, storage, refining, marketing, or related operations. Ranked by team size, largest first. Data current as of August 28, 2026.
The 25 largest oil and gas companies in the United States
Ranked by team size| # | Company | Verified emails |
|---|---|---|
| 1 |  Aramco | 44 |
| 2 |  Chevron | 17,935 |
| 3 |  OXY | 6,274 |
| 4 |  Conocophillips | 4,209 |
| 5 |  Valero | 3,099 |
| 6 |  CITGO | 1,001 |
| 7 |  Flint Hills Resources | 1,314 |
| 8 |  Motiva Enterprises LLC | 1,167 |
| 9 | OIL States International | 11 |
| 10 |  HF Sinclair | 1,092 |
| 11 |  Tesoro Corporation | 31 |
| 12 |  Southwestern Energy | 184 |
| 13 |  Delek US | 545 |
| 14 |  Forum Energy Technologies | 900 |
| 15 |  Noble Energy | 198 |
| 16 |  Coterra Energy | 580 |
| 17 | Nabors Drilling USA | 60 |
| 18 |  Rpc, INC | 75 |
| 19 |  Texas Fueling Services, INC | 38 |
| 20 |  Imperative Chemical Partners | 32 |
| 21 |  Thomas Oilfield Services | 60 |
| 22 |  Retif OIL & Fuel | 51 |
| 23 | Kaiser-Francis OIL Company | 59 |
| 24 | Furmanite America | 11 |
| 25 |  Cain Petroleum | 5 |
| 26 | Marathon OIL Company | 3 |
| 27 | Noram Drilling Company | 3 |
| 28 |  Gulfmark Energy | 14 |
Showing 25 of 538 oil and gas companies in the United States
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Oil and gas companies in the United States at a glance
As of Aug 28, 2026Companies by employee count
Companies by metro
| Metro | Companies |
|---|---|
| Oil and gas companies in Houston | 72 |
| Oil and gas companies in Dallas | 19 |
| Oil and gas companies in Midland | 18 |
| Oil and gas companies in Denver | 12 |
| Oil and gas companies in Fort Worth | 11 |
| Oil and gas companies in Oklahoma City | 9 |
| Oil and gas companies in Odessa | 8 |
| Oil and gas companies in Tulsa | 7 |
How this list was built
- Source
- The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
- Inclusion
- Companies whose own business descriptions match “oil and gas companies”, with match quality audited by blind human judging, and headquartered in the United States.
- 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
- Contact records re-verify on a rolling cadence; 388 contacts on this list were re-verified in the last 30 days.
- Refresh
- Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.
Frequently asked
How many oil and gas companies are in the directory?
The directory contains 538 oil and gas companies in the United States.
Where are the listed oil and gas companies located?
The list covers oil and gas companies in the United States. Houston is the single most-represented city among the listed companies.
How can I find contacts at oil and gas companies?
The directory includes 253,083 contacts and 41,710 email addresses for the listed oil and gas companies.
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About this data
RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.