Company lists · Data refreshed September 2026
Top 25 Petroleum extraction companies worldwide
RevenueBase identified 1,956 petroleum extraction companies worldwide as of September 2026 and tracks 361,202 professional contacts across them, including 64,277 with verified work emails. The United States is the largest market and Houston the largest hub.
This list covers petroleum extraction companies worldwide, 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 20, 2026. Country and city lists for petroleum extraction companies follow the table.
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 petroleum extraction companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 53,380 contacts → | ||||
Indirect evidence “We collaborate and engineer solutions to maximize asset value for our customers.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 36,135 contacts → | ||||
Indirect evidence “Sonatrach (Société Nationale pour la Recherche, la Production, le Transport, la Transformation, et la Commercialisation des Hydrocarbures s.p.a.) is an Algerian government-owned…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 35,924 contacts → | ||||
Indirect evidence “Petróleos Mexicanos es la mayor empresa de México, el mayor contribuyente fiscal del país, así como una de las empresas más grandes de América Latina.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 25,939 contacts → | ||||
Indirect evidence “We are one of the world's leading energy producers, and a primary catalyst for Abu Dhabi’s growth and diversification.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 15,722 contacts → | ||||
Indirect evidence “Maharatna ONGC is the largest producer of crude oil and natural gas in India, contributing around 70 per cent of Indian domestic production.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 12,478 contacts → | ||||
Indirect evidence “We are the leading exploration and production company in the Sultanate of Oman that delivers the majority of the country's crude oil production and natural gas supply, but above…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 5,865 contacts → | ||||
Indirect evidence “Nabors Industries is a leading provider of advanced technology for the energy industry.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 5,220 contacts → | ||||
Indirect evidence “Founded over thirty years ago, Perenco is an independent hydrocarbon producer involved in the entire lifecycle of projects, from exploration to decommissioning.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 4,845 contacts → | ||||
Indirect evidence “Seadrill is setting the standard in deepwater oil and gas drilling.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 4,346 contacts → | ||||
Indirect evidence “EOG Resources, Inc.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 4,277 contacts → | ||||
Indirect evidence “After more than a century, Imperial continues to be an industry leader in applying technology and innovation to responsibly develop Canada’s energy resources.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 3,932 contacts → | ||||
Indirect evidence “We are the one and only national company that possesses combined competencies in oil & gas services: seismic, drilling and oilfield.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 3,753 contacts → | ||||
Partial evidence “PTTEP conducts business in petroleum exploration, development, and production.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 3,683 contacts → | ||||
Indirect evidence “National Energy Services Reunited Corp.(NESR) was founded in 2017 as one of the largest national oilfield services providers in the MENA and Asia Pacific regions and was the first…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 3,514 contacts → | ||||
Indirect evidence “Murphy Oil Corporation is a global independent oil and natural gas exploration and production company.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 3,251 contacts → | ||||
Indirect evidence “ADES is a world-leading international provider of oil and gas drilling services.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 2,764 contacts → | ||||
Indirect evidence “Pluspetrol es una empresa privada de energía con más 45 años de experiencia en la exploración y producción de hidrocarburos.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 2,755 contacts → | ||||
Indirect evidence “Headquartered in Houston, Texas, Key Energy Services provides a wide array of leading edge energy production solutions and services.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 2,654 contacts → | ||||
Indirect evidence “PETRONAS CARIGALI SDN.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 2,585 contacts → | ||||
Indirect evidence “Cairn Oil & Gas, part of Vedanta Limited, is India's largest private oil and gas exploration and production company, contributing more than a quarter of India’s domestic crude oil…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2,373 contacts → | ||||
Indirect evidence “Archer is a company providing drilling and well services to the global energy industry.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2,317 contacts → | ||||
Indirect evidence “Patterson-UTI is a leading provider of drilling and completion services to oil and natural gas exploration and production companies in the United States and other select…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2,250 contacts → | ||||
Indirect evidence “TAQA is an international company that offers leading well solutions for the energy industry and is creating value and opportunity for all its stakeholders.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2,249 contacts → | ||||
Indirect evidence “OiLSERV is a provider of an expanding range of oilfield services, including well logging, well testing, production enhancement, drilling services, surface production management…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 2,240 contacts → | ||||
Partial evidence “Petroleum Company of Trinidad and Tobago Limited (“Petrotrin”), is an integrated Oil and Gas Company.” Source: RevenueBase Database · checked Sep 20, 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: petroleum extraction companies. 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 petroleum extraction companies.
- Partial evidence
- Its own public description names part of petroleum extraction companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name petroleum extraction companies. 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 1,956 petroleum extraction companies worldwide
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Petroleum extraction companies worldwide at a glance
As of Sep 20, 2026Companies by employee count
Email recency is reported on each country list linked below.
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 petroleum extraction companies, 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.
- Coverage
- Every country. Country and city lists for petroleum extraction companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “petroleum extraction companies”. 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 petroleum extraction companies), 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 petroleum extraction companies, and records with no verified work email.
- 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, 64,277 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 20, 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.
Petroleum extraction companies by location
10 lists · largest firstEvery Petroleum extraction companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Petroleum extraction companies based in the United States596
- Petroleum extraction companies based in Canada102
- Petroleum extraction companies based in Nigeria58
- Petroleum extraction companies based in Egypt54
- Petroleum extraction companies based in the United Kingdom52
- Petroleum extraction companies based in the United Arab Emirates51
- Petroleum extraction companies based in India50
- Petroleum extraction companies based in Indonesia35
- Petroleum extraction companies based in Brazil33
- Petroleum extraction companies based in Argentina27
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 petroleum extraction companies, 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 petroleum extraction companies are there worldwide?
RevenueBase identified 1,956 petroleum extraction companies worldwide 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?
Halliburton, headquartered in Houston, tops this list with the largest team on record.
Which country has the most petroleum extraction companies?
The United States leads with 596 companies, followed by Canada (102) and Nigeria (58). Every petroleum extraction companies list by country and city is linked on this page.
Which city has the most petroleum extraction companies?
Houston leads with 111 headquartered companies, followed by Calgary (58) and Midland (29).
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 64,277 verified decision-maker contacts tracked across these 1,956 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 20, 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.