Company lists · Data refreshed September 2026

Top 25 Oilfield companies worldwide

Name: Oilfield companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 16,168 companies tracked

RevenueBase identified 16,168 oilfield companies worldwide as of September 2026 and tracks 1,125,133 professional contacts across them, including 218,395 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers oilfield 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 21, 2026. Country and city lists for oilfield 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

16,168Companies

1,125,133Contacts tracked

218,395Verified emails

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The 25 largest oilfield companies worldwide

Ranked by team size

Top 25 of 16,168 oilfield companies worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to oilfield companies: 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	SLB	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	10001+	76,561 contacts →
	Indirect evidence “SLB is a global technology company that has driven energy innovation for more than a century.” Source: RevenueBase Database · checked Sep 21, 2026
2	Baker Hughes	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	10001+	61,166 contacts →
	Indirect evidence “Baker Hughes (NASDAQ: BKR) is an energy technology company that provides solutions for energy and industrial customers worldwide.” Source: RevenueBase Database · checked Sep 21, 2026
3	Halliburton	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	10001+	53,380 contacts →
	Indirect evidence “We collaborate and engineer solutions to maximize asset value for our customers.” Source: RevenueBase Database · checked Sep 21, 2026
4	Sonatrach	Indirect evidence	Hydra, AlgeriaHQ checked Sep 21, 2026	10001+	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 21, 2026
5	Saipem	Indirect evidence	Milan, ItalyHQ checked Sep 21, 2026	10001+	34,095 contacts →
	Indirect evidence “Saipem is a global leader in the engineering and construction of major projects for the energy and infrastructure sectors, both offshore and onshore.” Source: RevenueBase Database · checked Sep 21, 2026
6	NOV	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	10001+	29,577 contacts →
	Indirect evidence “NOV delivers technology-driven solutions to empower the global energy industry.” Source: RevenueBase Database · checked Sep 21, 2026
7	Petronas	Indirect evidence	Kuala Lumpur, MalaysiaHQ checked Sep 21, 2026	10001+	28,095 contacts →
	Indirect evidence “Petroliam Nasional Berhad (PETRONAS) is a leading global energy company committed to powering society’s progress in a responsible and sustainable manner.” Source: RevenueBase Database · checked Sep 21, 2026
8	Conocophillips	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	10001+	15,828 contacts →
	Indirect evidence “We are a global oil and gas company tasked with an important job-to safely find and deliver energy for the world.” Source: RevenueBase Database · checked Sep 21, 2026
9	Aker Solutions	Indirect evidence	Fornebu, NorwayHQ checked Sep 21, 2026	10001+	15,774 contacts →
	Indirect evidence “Aker Solutions is a global engineering and technology company known for delivering complex energy projects with trusted quality and predictable results.” Source: RevenueBase Database · checked Sep 21, 2026
10	Petroleum Development Oman	Indirect evidence	Muscat, OmanHQ checked Sep 21, 2026	5,001-10,000	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 21, 2026
11	Technip Former Company	Indirect evidence	United KingdomHQ checked Sep 21, 2026	10001+	11,255 contacts →
	Indirect evidence “Technip is a former company that was separated into two independent companies: TechnipFMC and Technip Energies, which now operate with no capital ties.” Source: RevenueBase Database · checked Sep 21, 2026
12	Transocean	Indirect evidence	Zug, SwitzerlandHQ checked Sep 21, 2026	1,001-5,000	10,068 contacts →
	Indirect evidence “Transocean is a leading international provider of offshore contract drilling services for oil and gas wells.” Source: RevenueBase Database · checked Sep 21, 2026
13	SBM Offshore	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 21, 2026	5,001-10,000	8,478 contacts →
	Indirect evidence “SBM Offshore is the world’s deepwater ocean-infrastructure expert.” Source: RevenueBase Database · checked Sep 21, 2026
14	Nabors Industries	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	10001+	5,865 contacts →
	Indirect evidence “Nabors Industries is a leading provider of advanced technology for the energy industry.” Source: RevenueBase Database · checked Sep 21, 2026
15	Noble Corporation	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	5,001-10,000	5,601 contacts →
	Indirect evidence “Noble is a leading offshore drilling contractor for the oil and gas industry.” Source: RevenueBase Database · checked Sep 21, 2026
16	W&t Offshore Inc. Nyse WTI	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	n/a	5,489 contacts →
	Indirect evidence “We are an independent oil and natural gas acquisition, exploitation and exploration company.” Source: RevenueBase Database · checked Sep 21, 2026
17	Perenco	Indirect evidence	Londres, United KingdomHQ checked Sep 21, 2026	5,001-10,000	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 21, 2026
18	MODEC	Indirect evidence	Chuo-ku, JapanHQ checked Sep 21, 2026	5,001-10,000	5,077 contacts →
	Indirect evidence “MODEC has been a leading provider of solutions for the floating offshore oil and gas market for over 50 years.” Source: RevenueBase Database · checked Sep 21, 2026
19	Seadrill	Indirect evidence	Houston, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,845 contacts →
	Indirect evidence “Seadrill is setting the standard in deepwater oil and gas drilling.” Source: RevenueBase Database · checked Sep 21, 2026
20	Hess Corporation	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
21	MOL Group	Indirect evidence	Budapest, HungaryHQ checked Sep 21, 2026	10001+	4,179 contacts →
	Indirect evidence “MOL Group is an integrated, international oil and gas company, headquartered in Budapest, Hungary.” Source: RevenueBase Database · checked Sep 21, 2026
22	Cotemar	Indirect evidence	Ciudad Del Carmen, MexicoHQ checked Sep 21, 2026	5,001-10,000	4,138 contacts →
	Indirect evidence “We are Mexican company specialized in services for the oil industry since 1979.” Source: RevenueBase Database · checked Sep 21, 2026
23	PT Elnusa TBK	Strong evidence	Jakarta Selatan, IndonesiaHQ checked Sep 21, 2026	1,001-5,000	3,932 contacts →
	Strong 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 21, 2026
24	NESR	Strong evidence	Houston, United StatesHQ checked Sep 21, 2026	5,001-10,000	3,683 contacts →
	Strong 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 21, 2026
25	Murphy OIL Corporation	Indirect evidence	Houston, TX, United StatesHQ checked Sep 21, 2026	n/a	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 21, 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: oilfield 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 oilfield companies.
Partial evidence: Its own public description names part of oilfield companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name oilfield 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 16,168 oilfield companies worldwide

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Oilfield companies worldwide at a glance

As of Sep 21, 2026

19.4%Verified-email coverage

69.6Average contacts per company

11-50Median size (employees)

5.0%Largest-city concentration · Houston

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

4,402

11-50

5,579

51-200

3,549

201-500

1,332

501-1,000

556

1,001-5,000

506

5,001-10,000

10001+

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 oilfield 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 oilfield companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “oilfield 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 oilfield 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 oilfield 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, 218,395 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.

Oilfield companies by location

77 lists · largest first

Every Oilfield companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 oilfield 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 oilfield companies are there worldwide?

RevenueBase identified 16,168 oilfield 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?

SLB, headquartered in Houston, tops this list with the largest team on record.

Which country has the most oilfield companies?

The United States leads with 4,737 companies, followed by Canada (1,098) and Nigeria (860). Every oilfield companies list by country and city is linked on this page.

Which city has the most oilfield companies?

Houston leads with 801 headquartered companies, followed by Calgary (351) and Midland (281).

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 218,395 verified decision-maker contacts tracked across these 16,168 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.