Company lists · Data refreshed October 2026

Top 18 Electric utilities and power companies based in the United Kingdom

Name: Electric utilities and power companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 65 companies tracked

RevenueBase identified 65 company matches for electric utilities and power companies associated with the United Kingdom as of October 2026 and tracks 40,944 professional contacts across them, including 15,697 with verified work emails. London is the largest hub.

This list covers company matches for electric utilities and power companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 12, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 12, 2026 How this list was built

65Companies

40,944Contacts tracked

15,697Verified emails

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The 18 largest electric utilities and power companies based in the United Kingdom

Ranked by team size

Top 18 of 65 company matches for electric utilities and power companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	National Grid	Exact match	London, United KingdomHQ recorded Oct 12, 2026	10001+	25,394 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2	EDF UK	Exact match	London, United KingdomHQ recorded Oct 12, 2026	10001+	8,594 contacts →
	Exact match “EDF is leading the charge towards An Electric Britain to help make energy more affordable and sustainable.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
3	Centrica	Exact match	Windsor, United KingdomHQ recorded Oct 12, 2026	10001+	4,831 contacts →
	Exact match “Centrica is an international energy services and solutions company, founded on a 200-year heritage of serving customers in homes and businesses.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4	SP Energy Networks	Exact match	Glasgow, United KingdomHQ recorded Oct 12, 2026	1,001-5,000	1,707 contacts →
	Exact match “We transmit, distribute and connect electricity to and from 3.5 million homes and businesses over our network, 24 hours a day, every day of the year.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5	IES Utilities Group LTD	Exact match	Manchester, United KingdomHQ recorded Oct 12, 2026	201-500	156 contacts →
	Exact match “Originally established in 2018, the business was rebranded in 2020 as IES Utilities Group Ltd.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6	Oakwick Utility Arborists LTD	Exact match	Sleaford, United KingdomHQ recorded Oct 12, 2026	11-50	12 contacts →
	Exact match “OAKWICK UTILITY ARBORISTS LTD is an utilities company.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7	Caecillian Limited	Exact match	Ashton-under-lyne, United KingdomHQ recorded Oct 12, 2026	1-10	8 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
8	Marble Power Limited	Exact match	Newport, United KingdomHQ recorded Oct 12, 2026	11-50	8 contacts →
	Exact match “MARBLE POWER LIMITED is an energy supply company based out of Kestrel Court, Waterwells Drive, Quedgeley, Gloucester, United Kingdom.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9	ENDCO	Exact match	Chelmsford, United KingdomHQ recorded Oct 12, 2026	11-50	7 contacts →
	Exact match “EnDCo is the brand name of EPG Energy Limited, a UK-based energy supply business operating in the corporate sector.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
10	Independent Power Corporation PLC	Exact match	London, United KingdomHQ recorded Oct 12, 2026	11-50	6 contacts →
	Exact match “Independent Power Corporation Plc (IPC) is a UK-based Independent Power Producer dedicated to developing, owning and operating reliable, efficient and future-ready energy assets.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11	Swithland Spring Water Limited	Exact match	Swithland, United KingdomHQ recorded Oct 12, 2026	1-10	5 contacts →
	Exact match “SWITHLAND SPRING WATER LIMITED is an utilities company.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	ETI Scotland Limited	Exact match	Clydebank, United KingdomHQ recorded Oct 12, 2026	1-10	4 contacts →
	Exact match “With over 20 years of experience in the electrical industry, ETI Scotland has built a strong reputation for delivering reliable, professional, and fully compliant electrical…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	Concise Energy Brokers Limited	Exact match	London, United KingdomHQ recorded Oct 12, 2026	1-10	3 contacts →
	Exact match “CONCISE ENERGY BROKERS LIMITED is an utilities company based out of 124 City Road, EC1V 2NX London, United Kingdom.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14	Positive Solutions Electrical LTD	Exact match	Harlow, United KingdomHQ recorded Oct 12, 2026	1-10	2 contacts →
	Exact match “POSITIVE SOLUTIONS ELECTRICAL LTD is an utilities company based out of 4 TOLLSWORTH WAY PUCKERIDGE, NR WARE, United Kingdom.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15	Future Heat Scotland	Exact match	Glasgow, United KingdomHQ recorded Oct 12, 2026	1-10	2 contacts →
	Exact match “Future Heat Scotland 0141 366 7834 07795 093 920 Garybrown@futureheatscotland.com Gas, electric, oil and renewables.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	LS Power LTD	Exact match	Turvey, United KingdomHQ recorded Oct 12, 2026	11-50	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	ICD Energy Limited	Exact match	South Yorkshire, United KingdomHQ recorded Oct 12, 2026	1-10	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18	Simply Energy Limited	Exact match	London, United KingdomHQ recorded Oct 12, 2026	1-10	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “electric utilities and power companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 18 of 65 electric utilities and power companies based in the United Kingdom

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Electric utilities and power companies based in the United Kingdom at a glance

As of Oct 12, 2026

38.3%Verified-email coverage

629.9Average contacts per company

1-10Median size (employees)

13.8%Largest-city concentration · London

Oct 12, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

10001+

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 65 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “electric utilities and power companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 15,697 professional contacts with verified work emails across the full matched dataset. 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 October 12, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “electric utilities and power companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many electric utilities and power companies are there based in the United Kingdom?

RevenueBase identified 65 company matches for electric utilities and power companies associated with the United Kingdom as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

National Grid tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most electric utilities and power companies?

London leads with 9 company records, followed by Chelmsford (2) and Glasgow (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 15,697 professional contacts with verified work emails tracked across these 65 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 12, 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 SmartSearch, 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.