Company lists · Data refreshed September 2026
Top 25 Petroleum exploration companies worldwide
RevenueBase identified 2,347 petroleum exploration companies worldwide as of September 2026 and tracks 337,010 professional contacts across them, including 53,500 with verified work emails. The United States is the largest market and Calgary the largest hub.
This list covers petroleum exploration 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 exploration 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 exploration companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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. | |||||
| 2 | 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. | |||||
| 3 | 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 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 12,478 contacts → | ||||
Partial 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. | |||||
| 5 | 6,379 contacts → | ||||
Indirect evidence “Cenovus Energy Inc.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 6,366 contacts → | ||||
Indirect evidence “Our purpose is to provide reliable and affordable energy to help create a better world for everyone.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 5,559 contacts → | ||||
Indirect evidence “We aim to thrive through the global energy transition with a low-cost, lower-carbon, profitable, resilient and diversified portfolio.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 5,489 contacts → | ||||
Partial evidence “We are an independent oil and natural gas acquisition, exploitation and exploration company.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 5,220 contacts → | ||||
Partial 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. | |||||
| 10 | 4,642 contacts → | ||||
Partial 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 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 4,346 contacts → | ||||
Indirect evidence “EOG Resources, Inc.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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. | |||||
| 13 | 3,753 contacts → | ||||
Strong evidence “PTTEP conducts business in petroleum exploration, development, and production.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 3,514 contacts → | ||||
Partial 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. | |||||
| 15 | 3,460 contacts → | ||||
Partial evidence “Anadarko is among the world’s largest independent oil and natural gas exploration and production companies, with corporate offices in The Woodlands, Texas.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 2,910 contacts → | ||||
Partial evidence “Medco E&P Indonesia, a subsidiary of Medco Energi Internasional Tbk, is dedicated to oil and gas operations in Indonesia, with a focus on upstream activities such as exploration…” 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 | 2,703 contacts → | ||||
Indirect evidence “Aker BP explores for and produces oil and gas on the Norwegian continental shelf.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 2,585 contacts → | ||||
Partial 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. | |||||
| 20 | 2,511 contacts → | ||||
Indirect evidence “INA-Industrija nafte, d.d.(INA, d.d.) is a medium-sized European oil company.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2,450 contacts → | ||||
Partial evidence “The pioneer of the natural gas industry in the country, Pakistan Petroleum Limited (PPL) has been a frontline player in the energy sector since the mid-1950s.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 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. | |||||
| 23 | 2,216 contacts → | ||||
Indirect evidence “The largest independent oil and gas company listed on the London Stock Exchange.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2,176 contacts → | ||||
Partial evidence “SM Energy Company is an independent energy company focused on the exploration, exploitation, development, acquisition, and production of natural gas and crude oil in the United…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 2,043 contacts → | ||||
Indirect evidence “GUPCO was formed on July 31, 1965 after the discovery of EL-Morgan offshore oil field.” 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 exploration 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 exploration companies.
- Partial evidence
- Its own public description names part of petroleum exploration companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name petroleum exploration 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 2,347 petroleum exploration companies worldwide
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Petroleum exploration 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 exploration 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 exploration companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “petroleum exploration 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 exploration 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 exploration 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, 53,500 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 exploration companies by location
16 lists · largest firstEvery Petroleum exploration companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Petroleum exploration companies based in the United States640
- Petroleum exploration companies based in Canada165
- Petroleum exploration companies based in the United Kingdom131
- Petroleum exploration companies based in Nigeria92
- Petroleum exploration companies based in Australia90
- Petroleum exploration companies based in India63
- Petroleum exploration companies based in Egypt58
- Petroleum exploration companies based in Indonesia38
- Petroleum exploration companies based in Pakistan33
- Petroleum exploration companies based in the United Arab Emirates32
- Petroleum exploration companies based in Brazil26
Cities
- Petroleum exploration companies based in Houston, United States120
- Petroleum exploration companies based in Dallas, United States54
- Petroleum exploration companies based in Denver, United States27
- Petroleum exploration companies based in Fort Worth, United States27
- Petroleum exploration companies based in Midland, United States27
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 exploration 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 exploration companies are there worldwide?
RevenueBase identified 2,347 petroleum exploration 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?
Sonatrach, headquartered in Hydra, tops this list with the largest team on record.
Which country has the most petroleum exploration companies?
The United States leads with 640 companies, followed by Canada (165) and the United Kingdom (131). Every petroleum exploration companies list by country and city is linked on this page.
Which city has the most petroleum exploration companies?
Calgary leads with 125 headquartered companies, followed by Houston (120) and London (71).
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 53,500 verified decision-maker contacts tracked across these 2,347 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.