Company lists · Data refreshed September 2026
Top 25 Energy utilities based in the United Kingdom
RevenueBase identified 171 energy utilities headquartered in the United Kingdom as of September 2026 and tracks 57,480 professional contacts across them, including 20,337 with verified work emails. London is the largest hub.
This list covers energy utilities 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 15, 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 energy utilities based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 24,403 contacts → | ||||
Partial 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 15, 2026Thanks. The Data Team will review it. | |||||
| 2 | 9,238 contacts → | ||||
Indirect evidence “Taking care of things.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 3 | 8,188 contacts → | ||||
Partial evidence “EDF is leading the charge towards An Electric Britain to help make energy more affordable and sustainable.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 4 | 4,555 contacts → | ||||
Partial evidence “Centrica is an international energy services and solutions company, founded on a 200-year heritage of serving customers in homes and businesses.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 5 | 3,989 contacts → | ||||
Partial 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 15, 2026Thanks. The Data Team will review it. | |||||
| 6 | 2,627 contacts → | ||||
Partial evidence “We help businesses manage energy needs, boost efficiency, control costs and achieve decarbonisation goals for a better energy future.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 7 | 792 contacts → | ||||
Partial evidence “Founded in 2003, Utilita Energy was created to challenge the Big 6 energy suppliers by empowering everyone with a fair and flexible service that’s good for the pocket and planet.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 8 | 762 contacts → | ||||
Partial evidence “We are Wales & West Utilities, your gas emergency and pipeline service.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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 15, 2026Thanks. The Data Team will review it. | |||||
| 10 | 159 contacts → | ||||
Strong evidence “At Consultiv Utilities, we help organisations to take control of their energy strategy and support them in navigating the complexities of energy, with confidence.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 11 | 137 contacts → | ||||
Indirect evidence “S&R Construction was founded in 1998 with a view to providing affordable, sustainable gas, water and electric mains and utility installation services for a broad range of clients.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 12 | 136 contacts → | ||||
Partial 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 15, 2026Thanks. The Data Team will review it. | |||||
| 13 | 135 contacts → | ||||
Partial evidence “Originally established in 2018, the business was rebranded in 2020 as IES Utilities Group Ltd.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 14 | 125 contacts → | ||||
Strong evidence “Mitie Energy are an award-winning, UK-based energy, utilities and sustainability solutions business.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 15 | 98 contacts → | ||||
Partial evidence “Procurement services from Independent Utility Advice can protect your company from rising business energy costs and fluctuating prices.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 16 | 94 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 17 | 48 contacts → | ||||
Indirect evidence “Indigo Networks invests in, adopts, owns and operates essential electricity, gas and water infrastructure and networks across the UK.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 18 | 45 contacts → | ||||
Partial evidence “We are pioneers in utilities bureau support services and developers of the best technology in the market.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 19 | 38 contacts → | ||||
Partial evidence “Are you tired of navigating the complexities of energy pricing, struggling with payment solutions, or managing your water services?” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 20 | 32 contacts → | ||||
Partial evidence “Crown Energy is the energy and utility division of the Crown Oil Group.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 21 | 30 contacts → | ||||
Indirect evidence “Utility4Business simplifies utility management for UK businesses by offering tailored solutions that can reduce utility costs by up to 45%.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 22 | 28 contacts → | ||||
Partial evidence “The UK’s industry-leading utilities, carbon and analytics management software provider.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 23 | 28 contacts → | ||||
Partial evidence “At Utility Stream Limited, we simplify energy for businesses while driving sustainability.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 24 | 27 contacts → | ||||
Partial evidence “Yü Group PLC is driving innovation in energy and utility supply solutions for UK businesses.” Source: RevenueBase Database · checked Sep 15, 2026Thanks. The Data Team will review it. | |||||
| 25 | 26 contacts → | ||||
Partial 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 15, 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: energy utilities. 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 utilities.
- Partial evidence
- Its own public description names part of energy utilities, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name energy utilities. 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 171 energy utilities based in the United Kingdom
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Energy utilities based in the United Kingdom at a glance
As of Sep 15, 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 171 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 energy utilities, 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 “energy utilities”. 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 utilities), 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 utilities, 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, 20,337 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 15, 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.
Energy utilities by metro
- Energy utilities in London26
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 energy utilities, 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 energy utilities are there based in the United Kingdom?
RevenueBase identified 171 energy utilities 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 energy utilities?
London leads with 26 headquartered companies, followed by Manchester (9) and Birmingham (4).
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 20,337 verified decision-maker contacts tracked across these 171 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 15, 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.