Company lists · Data refreshed September 2026

Top 25 Marine electrical contractors based in the United Kingdom

Name: Marine electrical contractors based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 1,331 companies tracked

RevenueBase identified 1,331 company matches for marine electrical contractors associated with the United Kingdom as of September 2026 and tracks 10,960 professional contacts across them, including 2,732 with verified work emails. London is the largest hub.

This list covers company matches for marine electrical contractors 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 17, 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 17, 2026 How this list was built

1,331Companies

10,960Contacts tracked

2,732Verified emails

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The 25 largest marine electrical contractors based in the United Kingdom

Ranked by team size

Top 25 of 1,331 company matches for marine electrical contractors based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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	Quartzelec Limited	Exact match	Rugby, United KingdomHQ recorded Sep 17, 2026	501-1,000	412 contacts →
	Exact match “Quartzelec is a leading independent electrical engineering group delivering solutions and services in both UK and global markets.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Apcl A&p Group Limited	Exact match	Hebburn, United KingdomHQ recorded Sep 17, 2026	501-1,000	240 contacts →
	Exact match “A&P, part of the APCL Group, is a global marine engineering business which operates six dry docks across two strategic locations in the UK and delivers engineering excellence to…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Ferguson Marine Port Glasgow Limited	Exact match	Port Glasgow, United KingdomHQ recorded Sep 17, 2026	201-500	156 contacts →
	Exact match “Ferguson Marine (Port Glasgow) Limited is Scotland's leading company in new build, refit and ship repair.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Seatrium Offshore Renewable Services LTD	Exact match	Lowestoft, United KingdomHQ recorded Sep 17, 2026	n/a	155 contacts →
	Exact match “Seatrium Offshore Renewable Services Ltd (Seatrium ORS) has over 55 years of unparalleled expertise and experience in the offshore energy industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Interocean Marine Services	Exact match	Portlethen, United KingdomHQ recorded Sep 17, 2026	51-200	134 contacts →
	Exact match “Interocean provide a comprehensive range of services to the offshore oil and gas, marine, and renewable sectors.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Dales Marine Services LTD	Exact match	Aberdeen, United KingdomHQ recorded Sep 17, 2026	51-200	120 contacts →
	Exact match “Founded in 1987, Dales Marine provide a diverse range of vessel and ship repair, fabrication, steelwork and engineering services for the shipping, oil & gas, chemical and civil…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	MPI Offshore	Exact match	Stokesley, United KingdomHQ recorded Sep 17, 2026	51-200	110 contacts →
	Exact match “We furnish all-round solutions, including engineering, procurement, and construction in the full value chain of offshore wind and adjacent marine construction activities.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Modutec	Exact match	Aberdeen, United KingdomHQ recorded Sep 17, 2026	51-200	103 contacts →
	Exact match “Repair, Conversion and New Build of Marine and Offshore Living Quarters and Technical Buildings.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Star International	Exact match	Birkenhead, United KingdomHQ recorded Sep 17, 2026	51-200	103 contacts →
	Exact match “Star International specialises in keeping vessels safe and compliant.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	SMS Group Ship Repair Marine Interiors Marine Engineering SC Sqep	Exact match	Southampton, United KingdomHQ recorded Sep 17, 2026	51-200	89 contacts →
	Exact match “Southampton Marine Services Ltd was established in 2004 and specialises in ship / work boat building, vessel repair and marine engineering; we trade in four markets - Commercial…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Shearwater Marine Services	Exact match	Sandbank, United KingdomHQ recorded Sep 17, 2026	51-200	87 contacts →
	Exact match “Founded in 1992, Shearwater Marine Services have since grown to become a highly respected topside and sub-surface marine engineering service provider.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Copius Group	Exact match	Newtownabbey, United KingdomHQ recorded Sep 17, 2026	201-500	81 contacts →
	Exact match “Copius Group is a premier provider of construction and engineering services, delivering comprehensive solutions for offshore and onshore projects across the globe.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Relay Engineering	Exact match	Plymouth, United KingdomHQ recorded Sep 17, 2026	51-200	81 contacts →
	Exact match “Established over 30 years ago, Relay was incorporated in 1989 as Relay South-West, later changing its name to Relay Engineering in January 2007.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	UK Docks Marine Services	Exact match	Tyne & Wear, United KingdomHQ recorded Sep 17, 2026	201-500	72 contacts →
	Exact match “UK Docks offers dry docks, afloat repair berths and specialist boat repair facilities throughout the UK and employs specialist service engineers for vessel repair, construction…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Royston	Exact match	Newcastle Upon Tyne, United KingdomHQ recorded Sep 17, 2026	51-200	68 contacts →
	Exact match “Royston are a dynamic and expanding diesel engine supply, service and repair company operating successfully within the marine, offshore, industrial, defence and rail sectors for…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	TMS LTD	Exact match	Devon, United KingdomHQ recorded Sep 17, 2026	51-200	65 contacts →
	Exact match “TMS Ltd have in excess of 31 years of expertise as a marine contractor within the Civil Engineering sector.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Atlantic Pacific Marine LTD	Exact match	Cardiff, United KingdomHQ recorded Sep 17, 2026	11-50	63 contacts →
	Exact match “Atlantic Pacific Marine is your dedicated marine service specialist.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Premier Electrics	Exact match	Magherafelt, United KingdomHQ recorded Sep 17, 2026	51-200	58 contacts →
	Exact match “Premier Electrics have been delivering exciting projects throughout Ireland, UK and Europe since 1993.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Aventus Energy	Exact match	Alness, United KingdomHQ recorded Sep 17, 2026	11-50	57 contacts →
	Exact match “Aventus Energy Ltd is a recently formed Scottish Highland based company operating from our bespoke premises in Alness.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Mcgeoch Technology Limited	Exact match	Birmingham, United KingdomHQ recorded Sep 17, 2026	51-200	54 contacts →
	Exact match “McGeoch Technology specialises in the design and manufacture of high-quality electrical control and instrumentation systems and specialist lighting for both land and sea…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Bartech Marine Engineering	Exact match	Colchester, United KingdomHQ recorded Sep 17, 2026	51-200	54 contacts →
	Exact match “Providing Safety through Mechanical Excellence.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	The Wiggett Group LTD	Exact match	Brentwood, United KingdomHQ recorded Sep 17, 2026	201-500	51 contacts →
	Exact match “Wiggett Electrical has gone from strength to strength.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	NES	Exact match	Inverness, United KingdomHQ recorded Sep 17, 2026	11-50	51 contacts →
	Exact match “NES is an Industrial and Commercial Electrical Engineering and Contracting business, based in the North and North East of Scotland.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Berthon	Exact match	Lymington, United KingdomHQ recorded Sep 17, 2026	51-200	49 contacts →
	Exact match “Berthon has been trading from our riverside site in Lymington since 1877.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	The Seaking Group	Exact match	Birkenhead, United KingdomHQ recorded Sep 17, 2026	51-200	46 contacts →
	Exact match “The SeaKing Group offers specialist electrical engineering services to the marine, industrial, commercial, military and offshore sectors.” Recorded in the RevenueBase company graph · Sep 17, 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 “marine electrical contractors”. 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 25 of 1,331 marine electrical contractors based in the United Kingdom

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Marine electrical contractors based in the United Kingdom at a glance

As of Sep 17, 2026

24.9%Verified-email coverage

8.2Average contacts per company

1-10Median size (employees)

4.4%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

812

11-50

387

51-200

201-500

501-1,000

1,001-5,000

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 1,331 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 “marine electrical contractors” 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 2,732 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 17, 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 “marine electrical contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many marine electrical contractors are there based in the United Kingdom?

RevenueBase identified 1,331 company matches for marine electrical contractors 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?

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

Which city has the most marine electrical contractors?

London leads with 59 company records, followed by Southampton (36) and Plymouth (17).

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 2,732 professional contacts with verified work emails tracked across these 1,331 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 17, 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.