Company lists · Data refreshed September 2026
Top 25 Gas and electric companies UK based in the United Kingdom
RevenueBase identified 216 gas and electric companies UK headquartered in the United Kingdom as of September 2026 and tracks 42,744 professional contacts across them, including 16,860 with verified work emails. London is the largest hub.
This list covers gas and electric companies UK 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 20, 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.
The 25 largest gas and electric companies UK based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 24,403 contacts → | ||||
Indirect 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 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,679 contacts → | ||||
Strong evidence “npower is one of Britain’s leading energy companies, serving domestic and business customers with electricity and gas.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 2,315 contacts → | ||||
Partial evidence “SGN manages the network which distributes natural and green gas to approximately six million homes and businesses across Scotland and southern England.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,512 contacts → | ||||
Indirect evidence “At E.ON Next, we make new energy work.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,130 contacts → | ||||
Partial evidence “We help people do things differently in the UK in order to shrink their bills with the excellent backup of a customer support team in the London head office.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,075 contacts → | ||||
Partial evidence “We’ve spent 90 years supplying energy to off-grid homes and businesses across the UK.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 977 contacts → | ||||
Partial evidence “Network Plus is a leading utility and infrastructure service provider, operating across the UK.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 509 contacts → | ||||
Indirect evidence “GTC is the market leading independent utility infrastructure provider to: • National & regional house builders and developers.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 504 contacts → | ||||
Partial evidence “We are BUUK, the UK's leading independent provider of last-mile utility networks.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 440 contacts → | ||||
Partial evidence “Transforming utilities for communities We are an expert, responsible and agile partner, providing vital services to the UK’s utilities networks.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 396 contacts → | ||||
Indirect evidence “The Energy Assets Group is a leading, nationwide, utilities firm which owns, operates and manages over 1.8 million meter, data and network assets throughout Britain.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 366 contacts → | ||||
Indirect evidence “Based in Canary Wharf and spanning operations across three continents, PE (formally Pozitive Energy) stands as a sustainable utility provider, alongside offering telecoms…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 331 contacts → | ||||
Partial evidence “Welcome to Corona Energy – a leading independent energy supplier to UK businesses.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 273 contacts → | ||||
Partial evidence “Yü Energy was built with a mission to shake up the UK business energy market, offering businesses innovative energy solutions that help save time and money.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 252 contacts → | ||||
Indirect evidence “Since 1998, we’ve provided small businesses with the essential services they need.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 249 contacts → | ||||
Indirect evidence “All Utilities.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 239 contacts → | ||||
Strong evidence “Based in Newmarket, Suffolk, we cover a wide range of industrial, commercial and residential smart metering and gas and electric applications across England, Scotland and Wales.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 214 contacts → | ||||
Indirect evidence “Welcome to Wave.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 202 contacts → | ||||
Strong evidence “We provide UK SMEs with telecoms, water, gas and electricity, payment services and business insurance.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 180 contacts → | ||||
Indirect evidence “At Ruby Energy, we are more than just energy suppliers; we are champions of your progress, specifically tailored to empower SMEs.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 174 contacts → | ||||
Partial evidence “Conrad Energy is a leading UK energy company.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 163 contacts → | ||||
Partial evidence “Everflow is a customer-focussed, ‘Excellent’-rated utilities company serving businesses across the UK with environmentally friendly water supply, commercial waste, and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 147 contacts → | ||||
Partial evidence “Ferns is one of the largest independent utility infrastructure services providers in the south of the UK.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 141 contacts → | ||||
Strong 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 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 136 contacts → | ||||
Strong evidence “ESP Utilities Group Ltd is licensed to operate gas and electricity networks by the industry regulator Ofgem and has helped thousands across the country to make the connection.” 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: gas and electric companies UK. 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 gas and electric companies UK.
- Partial evidence
- Its own public description names part of gas and electric companies UK, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name gas and electric companies UK. 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 216 gas and electric companies UK based in the United Kingdom
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Gas and electric companies UK based in the United Kingdom at a glance
As of Sep 20, 2026Companies by employee count
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 216 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 gas and electric companies UK, 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 “gas and electric companies UK”. 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 gas and electric companies UK), 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 gas and electric companies UK, 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, 16,860 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.
Gas and electric companies UK by metro
- Gas and electric companies UK in London25
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 gas and electric companies UK, 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 gas and electric companies UK are there based in the United Kingdom?
RevenueBase identified 216 gas and electric companies UK 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?
National Grid, headquartered in London, tops this list with the largest team on record.
Which city has the most gas and electric companies UK?
London leads with 25 headquartered companies, followed by Manchester (15) and Nottingham (6).
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 16,860 verified decision-maker contacts tracked across these 216 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.
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