Company lists · Data refreshed September 2026

Top 25 Electrification companies based in the United Kingdom

Name: Electrification 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 3,497 companies tracked

RevenueBase identified 3,497 electrification companies headquartered in the United Kingdom as of September 2026 and tracks 59,318 professional contacts across them, including 22,691 with verified work emails. London is the largest hub.

This list covers electrification companies 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 19, 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 19, 2026 86% judged on-target in blind review

3,497Companies

59,318Contacts tracked

22,691Verified emails

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The 25 largest electrification companies based in the United Kingdom

Ranked by team size

Top 25 of 3,497 electrification companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to electrification 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	National Grid	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	10001+	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 19, 2026
2	City Electrical Factors	Indirect evidence	Kenilworth, United KingdomHQ checked Sep 19, 2026	1,001-5,000	2,363 contacts →
	Indirect evidence “City Electrical Factors Ltd is a private limited company established in 1951.” Source: RevenueBase Database · checked Sep 19, 2026
3	Northern Powergrid	Indirect evidence	Newcastle, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,336 contacts →
	Indirect evidence “Want to be part of the People Behind the Power?” Source: RevenueBase Database · checked Sep 19, 2026
4	SP Electricity North West	Indirect evidence	North West England, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,322 contacts →
	Indirect evidence “We own and operate the North West's electricity distribution network.” Source: RevenueBase Database · checked Sep 19, 2026
5	Scottish And Southern Electricity Networks	Indirect evidence	Perth, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,109 contacts →
	Indirect evidence “We're responsible for maintaining the electricity networks supplying over 3.9 million homes and businesses across central southern England and north of the Central Belt of…” Source: RevenueBase Database · checked Sep 19, 2026
6	Kelly Group	Indirect evidence	Wembley, United KingdomHQ checked Sep 19, 2026	1,001-5,000	1,053 contacts →
	Indirect evidence “Established in 1985 to support the emerging UK cable television market, Kelly Group has diversified to meet the needs of our clients.” Source: RevenueBase Database · checked Sep 19, 2026
7	NIE Networks	Indirect evidence	Belfast, United KingdomHQ checked Sep 19, 2026	1,001-5,000	723 contacts →
	Indirect evidence “NIE Networks is responsible for the safe, secure and reliable supply of electricity to homes, farms and businesses across Northern Ireland.” Source: RevenueBase Database · checked Sep 19, 2026
8	Calisen	Indirect evidence	Manchester, United KingdomHQ checked Sep 19, 2026	1,001-5,000	692 contacts →
	Indirect evidence “We are Calisen.” Source: RevenueBase Database · checked Sep 19, 2026
9	Freedom	Indirect evidence	Leeds, United KingdomHQ checked Sep 19, 2026	1,001-5,000	664 contacts →
	Indirect evidence “Freedom is a leading provider of facilities and power engineering services.” Source: RevenueBase Database · checked Sep 19, 2026
10	Quartzelec Limited	Indirect evidence	Rugby, United KingdomHQ checked Sep 19, 2026	501-1,000	412 contacts →
	Indirect evidence “Quartzelec is a leading independent electrical engineering group delivering solutions and services in both UK and global markets.” Source: RevenueBase Database · checked Sep 19, 2026
11	Enerveo	Indirect evidence	Birmingham, United KingdomHQ checked Sep 19, 2026	1,001-5,000	384 contacts →
	Indirect evidence “Enerveo is a multi-disciplinary contracting business, with the skills and expertise to deliver complex projects in complex environments across a number of different service lines.” Source: RevenueBase Database · checked Sep 19, 2026
12	Brush Group	Strong evidence	Loughborough, United KingdomHQ checked Sep 19, 2026	501-1,000	367 contacts →
	Strong evidence “We support the global drive to net zero with innovative, engineered solutions that address grid resilience and systems challenges, facilitate electrification of transport and…” Source: RevenueBase Database · checked Sep 19, 2026
13	SPL Powerlines Uk&i	Indirect evidence	Coatbridge, United KingdomHQ checked Sep 19, 2026	501-1,000	337 contacts →
	Indirect evidence “SPL Powerlines UK & I is a leading multi-disciplinary infrastructure specialist, offering end-to-end delivery across both rail and energy sectors with capabilities that set us…” Source: RevenueBase Database · checked Sep 19, 2026
14	Clarkson Evans LTD	Indirect evidence	Gloucester, United KingdomHQ checked Sep 19, 2026	501-1,000	331 contacts →
	Indirect evidence “With over 850 staff, we are one of the UK’s leading electrical contractors and solar PV installers.” Source: RevenueBase Database · checked Sep 19, 2026
15	Avk-Seg	Indirect evidence	Maidenhead, United KingdomHQ checked Sep 19, 2026	201-500	272 contacts →
	Indirect evidence “AVK is the largest and fastest-growing supplier of innovative power solutions for data centres, AI infrastructure and leading organisations in the UK and Europe.” Source: RevenueBase Database · checked Sep 19, 2026
16	Intec Energy Solutions	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	501-1,000	242 contacts →
	Indirect evidence “INTEC Energy Solutions delivers best-in-class services in Engineering, Procurement, Construction (EPC), Battery Energy Storage Systems (BESS), Manufacturing, Project Development…” Source: RevenueBase Database · checked Sep 19, 2026
17	Sureserve Energy Services Meters	Indirect evidence	Newmarket, United KingdomHQ checked Sep 19, 2026	201-500	239 contacts →
	Indirect 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 19, 2026
18	Volkerhighways	Indirect evidence	Hoddesdon, United KingdomHQ checked Sep 19, 2026	201-500	198 contacts →
	Indirect evidence “VolkerHighways is a leader in the delivery of highways and street lighting term maintenance contracts, traffic management and specialist EV charging solutions.” Source: RevenueBase Database · checked Sep 19, 2026
19	IQA Elecnor	Indirect evidence	Glasgow, United KingdomHQ checked Sep 19, 2026	201-500	184 contacts →
	Indirect evidence “IQA lead the way in designing, building, maintaining, and upgrading electrical utility networks, telecommunication networks, EVCP and electrical infrastructure for both the public…” Source: RevenueBase Database · checked Sep 19, 2026
20	Asee Group	Indirect evidence	Newry, United KingdomHQ checked Sep 19, 2026	51-200	151 contacts →
	Indirect evidence “ASEE Group is a leader in mechanical and electrical engineering, specialising in generator integration and full-service installations for 45+ years.” Source: RevenueBase Database · checked Sep 19, 2026
21	Aptus Utilities LTD	Indirect evidence	Bolton, United KingdomHQ checked Sep 19, 2026	201-500	146 contacts →
	Indirect evidence “Aptus Utilities is a leading multi-utility connections provider delivering electric, water, gas, EV Charging and street lighting design and installation services throughout the UK.” Source: RevenueBase Database · checked Sep 19, 2026
22	PN Daly Limited	Indirect evidence	Rochdale, United KingdomHQ checked Sep 19, 2026	501-1,000	141 contacts →
	Indirect evidence “P.N.” Source: RevenueBase Database · checked Sep 19, 2026
23	MCS	Indirect evidence	Bristol, United KingdomHQ checked Sep 19, 2026	51-200	138 contacts →
	Indirect evidence “MCS Ltd are specialist building services engineers covering all aspects of commercial and industrial building services and infrastructure engineering across varying market sectors.” Source: RevenueBase Database · checked Sep 19, 2026
24	ESP Utilities Group LTD	Indirect evidence	Leatherhead, United KingdomHQ checked Sep 19, 2026	51-200	136 contacts →
	Indirect 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 19, 2026
25	Powerstar	Strong evidence	Sheffield, United KingdomHQ checked Sep 19, 2026	51-200	135 contacts →
	Strong evidence “A D2Zero Company With a 24-year track record, Powerstar is an industry leader in electrification, specialising in designing and manufacturing cutting-edge power management tech…” Source: RevenueBase Database · checked Sep 19, 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: electrification 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 electrification companies.
Partial evidence: Its own public description names part of electrification companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electrification 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 3,497 electrification companies based in the United Kingdom

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Electrification companies based in the United Kingdom at a glance

As of Sep 19, 2026

38.3%Verified-email coverage

17.0Average contacts per company

1-10Median size (employees)

6.2%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

1,994

11-50

1,174

51-200

203

201-500

501-1,000

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 3,497 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 electrification 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 the United Kingdom whose own description of what they do matches “electrification 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 electrification 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 electrification companies, 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, 22,691 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 19, 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.

Electrification companies by metro

Electrification companies in London217
Electrification companies in Manchester56
Electrification companies in Leeds43
Electrification companies in Nottingham42
Electrification companies in Bristol38
Electrification companies in Glasgow36
Electrification companies in Birmingham33
Electrification companies in Sheffield31
Electrification companies in Southampton28
Electrification companies in Hull25
Electrification companies in Liverpool25

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 electrification companies, 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 electrification companies are there based in the United Kingdom?

RevenueBase identified 3,497 electrification companies 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 electrification companies?

London leads with 217 headquartered companies, followed by Manchester (56) and Leeds (43).

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 22,691 verified decision-maker contacts tracked across these 3,497 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 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 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.