Company lists · Data refreshed September 2026

Top 25 Energy companies based in London, United Kingdom

Name: Energy companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 12, 2026 138 companies tracked

RevenueBase lists 138 energy companies based in London, United Kingdom, with 161,353 business contacts and 45,393 email addresses. The directory covers organizations involved in producing, generating, transmitting, distributing, trading, or supplying energy. Across the United Kingdom, London is the largest hub for this category.

Energy companies produce, generate, transmit, distribute, trade, or supply energy and related energy products and services. This list covers companies that produce, generate, transmit, distribute, trade, or supply energy, including electricity, fuels, and renewable energy products. Ranked by team size, largest first. Data current as of September 12, 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 12, 2026 86% judged on-target in blind review

138Companies

161,353Contacts tracked

45,393Verified emails

19,914Mobile numbers

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The 25 largest energy companies based in London, United Kingdom

Ranked by team size

Top 25 of 138 energy companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 12, 2026. RevenueBase Smart Search rates how each company's information relates to energy 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	SHELL	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	10001+	115,863 contacts →
	Strong evidence “Shell is a global group of energy and petrochemical companies, employing people across 70+ countries.” Source: RevenueBase Database · checked Sep 12, 2026
2	National Grid	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	10001+	24,403 contacts →
	Strong evidence “We power the lives of millions of people across Britain, New York and Massachusetts, moving energy from where it’s made to the communities that need it, every single day.” Source: RevenueBase Database · checked Sep 12, 2026
3	EDF UK	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	10001+	8,188 contacts →
	Strong evidence “EDF is leading the charge towards An Electric Britain to help make energy more affordable and sustainable.” Source: RevenueBase Database · checked Sep 12, 2026
4	Octopus Energy	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1,001-5,000	3,989 contacts →
	Strong evidence “We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.” Source: RevenueBase Database · checked Sep 12, 2026
5	Hunting	Strong evidence	London, United KingdomHQ checked Sep 12, 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 12, 2026
6	EDF Trading	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	501-1,000	870 contacts →
	Strong evidence “EDF Trading is a leader in the international wholesale energy markets.” Source: RevenueBase Database · checked Sep 12, 2026
7	Kaluza	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	501-1,000	595 contacts →
	Strong evidence “Kaluza is the Energy Intelligence Platform, turning energy complexity into seamless coordination.” Source: RevenueBase Database · checked Sep 12, 2026
8	Energean	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	501-1,000	587 contacts →
	Strong 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 12, 2026
9	Gazprom Marketing & Trading	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	501-1,000	387 contacts →
	Indirect evidence “Please note Gazprom Marketing & Trading is now SEFE Marketing & Trading.” Source: RevenueBase Database · checked Sep 12, 2026
10	PRAX	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1,001-5,000	383 contacts →
	Strong evidence “The Prax Group is a British multinational, independent global energy conglomerate dealing in crude oil, petroleum products and biofuels, headquartered in London, with a complete…” Source: RevenueBase Database · checked Sep 12, 2026
11	SO Energy	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	378 contacts →
	Strong evidence “We do energy, you do you.” Source: RevenueBase Database · checked Sep 12, 2026
12	Northern Petroleum PLC	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	n/a	314 contacts →
	Indirect evidence “Northern Petroleum is an oil and gas exploration and production company quoted on the AIM Market of the London Stock Exchange.” Source: RevenueBase Database · checked Sep 12, 2026
13	Inatech	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	275 contacts →
	Strong evidence “Established in 2002, Inatech is a global pioneer in intelligent cloud-based energy trading risk management (ETRM) and fuel management solutions.” Source: RevenueBase Database · checked Sep 12, 2026
14	Petroineos Trading Limited	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	256 contacts →
	Indirect evidence “Petroineos comprises trading and refining joint ventures between PetroChina International (London) Company Limited and INEOS.” Source: RevenueBase Database · checked Sep 12, 2026
15	VPI	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	214 contacts →
	Indirect evidence “With a capacity of 3.5GW, we are one of the leading power companies in the UK and Ireland.” Source: RevenueBase Database · checked Sep 12, 2026
16	Brook Green Supply	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	183 contacts →
	Strong evidence “As a trusted end-to-end partner in the energy space, Brook Green Supply delivers the insight and expertise our customers need to make informed decisions, transact energy with…” Source: RevenueBase Database · checked Sep 12, 2026
17	TTEP	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	501-1,000	160 contacts →
	Indirect evidence “TTEP is a flexible power generation company jointly owned by EPH and TotalEnergies.” Source: RevenueBase Database · checked Sep 12, 2026
18	Brady Technologies	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	146 contacts →
	Strong evidence “At Brady Technologies, we are at the forefront of the energy transition, helping market participants navigate new challenges and opportunities with confidence.” Source: RevenueBase Database · checked Sep 12, 2026
19	BULB	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	501-1,000	141 contacts →
	Indirect evidence “Bulb provided 100% renewable electricity to homes in the UK, France, Spain and Texas and 100% carbon offset gas in the UK.” Source: RevenueBase Database · checked Sep 12, 2026
20	Quantum Commodity Intelligence	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	62 contacts →
	Indirect evidence “Quantum Commodity Intelligence delivers daily pricing, exclusive news and market data for oil, biofuels, carbon, ammonia and hydrogen.” Source: RevenueBase Database · checked Sep 12, 2026
21	GAS Strategies	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	45 contacts →
	Indirect evidence “In a world where speed is a competitive advantage, Gas Strategies accelerates your route to readiness.” Source: RevenueBase Database · checked Sep 12, 2026
22	Enbw Generation UK	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	37 contacts →
	Strong evidence “EnBW Energie-Baden-Württemberg AG - the name reflects our roots and our commitment.” Source: RevenueBase Database · checked Sep 12, 2026
23	Calenergy Resources Limited	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	33 contacts →
	Indirect evidence “CalEnergy Resources Limited is a wholly-owned subsidiary of Northern Powergrid an electrical distribution company based in Newcastle Upon Tyne that delivers safe and reliable…” Source: RevenueBase Database · checked Sep 12, 2026
24	Kistos	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	32 contacts →
	Strong evidence “Kistos is a high-growth, agile integrated energy company focused on unlocking value across its portfolio and through disciplined, value-accretive M&A.” Source: RevenueBase Database · checked Sep 12, 2026
25	Utilidex	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	26 contacts →
	Strong evidence “Utilidex delivers a range of integrated energy software products supporting end customers, consultants and energy suppliers/generators for data management, billing, trading…” Source: RevenueBase Database · checked Sep 12, 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: energy 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 energy companies.
Partial evidence: Its own public description names part of energy companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy 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 138 energy companies based in London, United Kingdom

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Energy companies based in London, United Kingdom at a glance

As of Sep 12, 2026

28.1%Verified-email coverage

12.3%Mobile-number coverage

1169.2Average contacts per company

11-50Median size (employees)

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 14.0d

37,7320–30

6,79131–60

19361–90

2390–180

654180+

Company record updated

Median 77.0d

00–30

47,48031–60

83,06361–90

22,31990–180

8,491180+

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 energy 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.
What qualifies: Companies headquartered in London, United Kingdom whose own description of what they do matches “energy 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 energy 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 energy companies, and records with no verified work email. Companies headquartered outside London 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, 45,393 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 12, 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 are energy companies?

Energy companies produce, generate, transmit, distribute, trade, or supply energy and related products and services.

How many energy companies are based in London, United Kingdom?

The directory lists 138 energy companies based in London, United Kingdom, with 161,353 business contacts and 45,393 email addresses.

Which city in the United Kingdom has the most energy companies?

London leads the United Kingdom with 137 headquartered companies, followed by Aberdeen (9) and Manchester (9).

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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.