Company lists · Data refreshed September 2026

Top 20 Electricity generation companies based in the United Kingdom

Name: Electricity generation companies 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 40 companies tracked

RevenueBase identified 40 company matches for electricity generation companies associated with the United Kingdom as of September 2026 and tracks 1,476 professional contacts across them, including 703 with verified work emails. London is the largest hub.

This list covers company matches for electricity generation 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 September 19, 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 Sep 19, 2026 How this list was built

40Companies

1,476Contacts tracked

703Verified emails

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The 20 largest electricity generation companies based in the United Kingdom

Ranked by team size

Top 20 of 40 company matches for electricity generation companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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	Intergen	Exact match	Edinburgh, United KingdomHQ recorded Sep 19, 2026	51-200	324 contacts →
	Exact match “InterGen is a power generation firm with four power plants in operation and a significant development pipeline in the UK, representing a total generation capacity of 2,800…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	Infinis	Exact match	Northampton, United KingdomHQ recorded Sep 19, 2026	201-500	269 contacts →
	Exact match “Infinis is the largest generator of power from landfill gas in the UK.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	Conrad Energy	Exact match	Abingdon, United KingdomHQ recorded Sep 19, 2026	51-200	174 contacts →
	Exact match “Conrad Energy is a leading UK energy company.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	TTEP	Exact match	London, United KingdomHQ recorded Sep 19, 2026	501-1,000	160 contacts →
	Exact match “TTEP is a flexible power generation company jointly owned by EPH and TotalEnergies.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Econergy Renewable Energy LTD	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	112 contacts →
	Exact match “Our Vision Renewable energy will be the source of power for future generations.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	Welsh Power Pŵer Cymru	Exact match	Cardiff, United KingdomHQ recorded Sep 19, 2026	11-50	44 contacts →
	Exact match “With over 550MW of flexible generation under management and a series of grid stability projects in construction and development, we play an important role in supporting a UK…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Enbw Generation UK	Exact match	London, United KingdomHQ recorded Sep 19, 2026	11-50	37 contacts →
	Exact match “EnBW Energie-Baden-Württemberg AG - the name reflects our roots and our commitment.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	Marchwood Power LTD	Exact match	Marchwood, United KingdomHQ recorded Sep 19, 2026	11-50	28 contacts →
	Exact match “Marchwood Power Limited owns and operates a £380million natural gas-fired combined cycle (CCGT) power station on Marchwood Industrial Park.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Saltend Cogeneration Company Limited	Exact match	Hull, United KingdomHQ recorded Sep 19, 2026	51-200	13 contacts →
	Exact match “Saltend Cogeneration Company Limited is a gas fired power station in Hull, UK and part of the Triton Power Ltd group of companies.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	TLS Energy	Exact match	Rickmansworth, United KingdomHQ recorded Sep 19, 2026	11-50	11 contacts →
	Exact match “TLS Energy Limited is the holding company for a diversified group of companies.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	PM Power	Exact match	Lisburn, United KingdomHQ recorded Sep 19, 2026	11-50	9 contacts →
	Exact match “Serving the UK and Ireland with Industry leading power generation solutions, specialising in: DIESEL GENERATORS GAS GENERATORS CHP CONTROLS & MONITORING EMERGING TECHNOLOGIES” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	Green Frog Power LTD	Exact match	Birmingham, United KingdomHQ recorded Sep 19, 2026	11-50	9 contacts →
	Exact match “Green Frog Power Ltd is a utility company based at 17 The Courtyard, Gorsey Lane, Coleshill, Birmingham, B46 1JA.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	ENDCO	Exact match	Chelmsford, United KingdomHQ recorded Sep 19, 2026	11-50	8 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 · Sep 19, 2026 · View company records in RevenueBase
14	Marble Power Limited	Exact match	Newport, United KingdomHQ recorded Sep 19, 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 · Sep 19, 2026 · View company records in RevenueBase
15	Independent Power Corporation PLC	Exact match	London, United KingdomHQ recorded Sep 19, 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 · Sep 19, 2026 · View company records in RevenueBase
16	GAS Engine Exchange LTD	Exact match	London, United KingdomHQ recorded Sep 19, 2026	1-10	6 contacts →
	Exact match “GAS ENGINE EXCHANGE LTD is a business supplies and equipment company based out of United Kingdom.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Sutton Power Engineering	Exact match	Scunthorpe, United KingdomHQ recorded Sep 19, 2026	11-50	5 contacts →
	Exact match “Sutton Power is a leading energy technology manufacturer dedicated to designing sustainable power products and providing innovative problem-solving energy solutions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	Rurelec PLC RUR	Exact match	London, United KingdomHQ recorded Sep 19, 2026	1-10	4 contacts →
	Exact match “Rurelec PLC is an expanding independent power producer with operations in Latin America,Main business consists in the ownership and development of power generation facilities on…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	NET Zero Technologies	Exact match	Newcastle, United KingdomHQ recorded Sep 19, 2026	11-50	2 contacts →
	Exact match “We empower businesses to reach Net Zero and are removing the stigma that reaching Net Zero will be a financial burden.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Simply Energy Limited	Exact match	London, United KingdomHQ recorded Sep 19, 2026	1-10	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 19, 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 “electricity generation 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 20 of 40 electricity generation companies based in the United Kingdom

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Electricity generation companies based in the United Kingdom at a glance

As of Sep 19, 2026

47.6%Verified-email coverage

36.9Average contacts per company

11-50Median size (employees)

25.0%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 40 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 “electricity generation 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 703 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 September 19, 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 “electricity generation companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many electricity generation companies are there based in the United Kingdom?

RevenueBase identified 40 company matches for electricity generation companies associated with the United Kingdom as of September 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?

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

Which city has the most electricity generation companies?

London leads with 10 company records, followed by Edinburgh (3) and Birmingham (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 703 professional contacts with verified work emails tracked across these 40 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 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 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.