Company lists · Data refreshed September 2026

Top 22 Upstream oil and gas operators based in the United Kingdom

Name: Upstream oil and gas operators based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 63 companies tracked

RevenueBase identified 63 upstream oil and gas operators headquartered in the United Kingdom as of September 2026 and tracks 9,512 professional contacts across them, including 2,185 with verified work emails. London is the largest hub.

This list covers upstream oil and gas operators headquartered in the United Kingdom, 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 19, 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 19, 2026 86% judged on-target in blind review

63Companies

9,512Contacts tracked

2,185Verified emails

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The 22 largest upstream oil and gas operators based in the United Kingdom

Ranked by team size

Top 22 of 63 upstream oil and gas operators based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to upstream oil and gas operators: 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	Hunting	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,211 contacts →
	Strong evidence “HUNTING is an energy services provider to the world's leading national and international oil and gas companies, manufacturing and distributing products that enable the extraction…” Source: RevenueBase Database · checked Sep 19, 2026
2	Excellence Logging	Indirect evidence	London W2 2es, United KingdomHQ checked Sep 19, 2026	1,001-5,000	933 contacts →
	Indirect evidence “Excellence Logging is an established energy services provider focused on optimizing well performance.” Source: RevenueBase Database · checked Sep 19, 2026
3	Cairn Energy PLC	Strong evidence	Edinburgh, United KingdomHQ checked Sep 19, 2026	201-500	927 contacts →
	Strong evidence “Cairn Energy PLC ('Cairn') is one of Europe's leading independent oil and gas exploration and production companies and is listed on the London Stock Exchange.” Source: RevenueBase Database · checked Sep 19, 2026
4	Assala Energy	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	655 contacts →
	Partial evidence “Assala Energy is an oil exploration and production company.” Source: RevenueBase Database · checked Sep 19, 2026
5	Energean	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	587 contacts →
	Indirect evidence “Established in 2007, Energean is a London-listed FTSE 250 and Tel Aviv-listed TA-90 E&P company with operations in the Europe, Middle East and Africa (“EMEA”) region.” Source: RevenueBase Database · checked Sep 19, 2026
6	Pharos Energy	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	28 contacts →
	Indirect evidence “Pharos Energy is an independent energy company listed on the main market of the London Stock Exchange focused on delivering sustainable growth and returns to stakeholders, with a…” Source: RevenueBase Database · checked Sep 19, 2026
7	Oilfield Production Enhancement Consulting Services Opecs LTD	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 19, 2026	1-10	17 contacts →
	Indirect evidence “Oilfield Production Enhancement Consulting Services (OPECS) LTD is an experienced and dynamic company based in Aberdeen UK which aims to provide best in class technical…” Source: RevenueBase Database · checked Sep 19, 2026
8	Petroxin	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	13 contacts →
	Strong evidence “PETROXIN is an international upstream oil and gas company providing technical expertise and cost-effective full life-cycle integrated solutions to global clients of operators and…” Source: RevenueBase Database · checked Sep 19, 2026
9	AOT	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	12 contacts →
	Indirect evidence “AOT is an energy services company serving our customers with oilfield products and services and support the industry in the energy transition.” Source: RevenueBase Database · checked Sep 19, 2026
10	EOS Europe LTD	Strong evidence	Aberdeen, United KingdomHQ checked Sep 19, 2026	11-50	11 contacts →
	Strong evidence “EOS Europe Ltd (EOS) deliver a range of specialist services to the oil and gas industry, specifically focusing on the offshore drilling and production markets.” Source: RevenueBase Database · checked Sep 19, 2026
11	Prestil Energy LTD	Partial evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	11 contacts →
	Partial evidence “Prestil Energy Ltd is a UK-based international oilfield service company specializing in Enhanced Oil Recovery (EOR), well stimulation, and production optimization technologies for…” Source: RevenueBase Database · checked Sep 19, 2026
12	Nobel Upstream	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	10 contacts →
	Strong evidence “Nobel Upstream is a privately held independent exploration and production company engaged in oil and natural gas projects.” Source: RevenueBase Database · checked Sep 19, 2026
13	Nucliex	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 19, 2026	11-50	7 contacts →
	Indirect evidence “Nucliex delivers high quality products and services in well construction, drilling technologies, and well flow management.” Source: RevenueBase Database · checked Sep 19, 2026
14	Frontrow Energy Technology Group	Strong evidence	Aberdeen, United KingdomHQ checked Sep 19, 2026	1-10	5 contacts →
	Strong evidence “FrontRow Energy Technology Group Limited is a young and dynamic upstream oil and gas services group delivering advanced industry solutions, designed to provide dramatic cost…” Source: RevenueBase Database · checked Sep 19, 2026
15	Bryce Oils LTD	Partial evidence	Bathgate, United KingdomHQ checked Sep 19, 2026	11-50	5 contacts →
	Partial evidence “BRYCE OILS LIMITED is an oil & energy company.” Source: RevenueBase Database · checked Sep 19, 2026
16	Beacon Energy PLC	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	1-10	3 contacts →
	Strong evidence “Beacon Energy is an upstream oil & gas company focused on growth through acquisition or farm-in to non-operated, appraisal or development projects where there is an opportunity to…” Source: RevenueBase Database · checked Sep 19, 2026
17	Sequa Petroleum N.V	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	11-50	3 contacts →
	Strong evidence “Sequa Petroleum is an oil and gas company listed on Euronext Marché Libre which focuses on taking discovered oil and gas reserves and resources from appraisal through to…” Source: RevenueBase Database · checked Sep 19, 2026
18	SEA & Land Global Group S.A	Partial evidence	Weymouth, United KingdomHQ checked Sep 19, 2026	51-200	2 contacts →
	Partial evidence “SEA AND LAND LIMITED is an Oil and Energy company located in 14 Albany Rd, Weymouth, United Kingdom.” Source: RevenueBase Database · checked Sep 19, 2026
19	Helix Oilfield Services LTD	Strong evidence	Aberdeen, United KingdomHQ checked Sep 19, 2026	1-10	1 contacts →
	Strong evidence “HOS is an independent oil and gas company that provides a new approach to solving equipment sourcing, engineering services and commercial storage challenges in the North East of…” Source: RevenueBase Database · checked Sep 19, 2026
20	Petroleum Geology Consulting Limited	Partial evidence	Walton-on-thames, United KingdomHQ checked Sep 19, 2026	1-10	1 contacts →
	Partial evidence “Petroleum Geology Consulting Limited was founded to provide a source of reservoir, development, and production geology expertise for operators, co-venturers, and investor groups…” Source: RevenueBase Database · checked Sep 19, 2026
21	Hogarth Energy Limited	Strong evidence	Aberdeen, United KingdomHQ checked Sep 19, 2026	1-10	1 contacts →
	Strong evidence “Delivering Safe, Reliable, Cost Effective Performance to the Upstream Oil and Gas industry.” Source: RevenueBase Database · checked Sep 19, 2026
22	Athena Exploration Limited	Strong evidence	Aberdeen, United KingdomHQ checked Sep 19, 2026	1-10	1 contacts →
	Strong evidence “ATHENA EXPLORATION LIMITED is an oil & gas company based out of 1 St Devenick's Place, Cults, Aberdeen AB15 9LN, United Kingdom.” Source: RevenueBase Database · checked Sep 19, 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: upstream oil and gas operators. 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 upstream oil and gas operators.
Partial evidence: Its own public description names part of upstream oil and gas operators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name upstream oil and gas operators. 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 22 of 63 upstream oil and gas operators based in the United Kingdom

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Upstream oil and gas operators based in the United Kingdom at a glance

As of Sep 19, 2026

23.0%Verified-email coverage

151.0Average contacts per company

11-50Median size (employees)

38.1%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 63 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 upstream oil and gas operators, 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 Kingdom whose own description of what they do matches “upstream oil and gas operators”. 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 upstream oil and gas operators), 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 upstream oil and gas operators, and records with no verified work email. Companies headquartered outside United Kingdom 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, 2,185 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 19, 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.

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 upstream oil and gas operators, 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 upstream oil and gas operators are there based in the United Kingdom?

RevenueBase identified 63 upstream oil and gas operators headquartered in the United Kingdom 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?

Hunting, headquartered in London, tops this list with the largest team on record.

Which city has the most upstream oil and gas operators?

London leads with 24 headquartered companies, followed by Aberdeen (9) and Liverpool (2).

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 2,185 verified decision-maker contacts tracked across these 63 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 19, 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.