Company lists · Data refreshed September 2026

Top 25 Offshore pipeline installation contractors based in the United Kingdom

Name: Offshore pipeline installation 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 220 companies tracked

RevenueBase identified 220 offshore pipeline installation contractors headquartered in the United Kingdom as of September 2026 and tracks 9,734 professional contacts across them, including 3,257 with verified work emails. Aberdeen is the largest hub.

This list covers offshore pipeline installation contractors 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 17, 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 17, 2026 86% judged on-target in blind review

220Companies

9,734Contacts tracked

3,257Verified emails

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The 25 largest offshore pipeline installation contractors based in the United Kingdom

Ranked by team size

Top 25 of 220 offshore pipeline installation contractors based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to offshore pipeline installation contractors: 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	Altera Infrastructure	Partial evidence	Aberdeenshire, United KingdomHQ checked Sep 17, 2026	501-1,000	955 contacts →
	Partial evidence “Altera Infrastructure is a leading global energy infrastructure services group focused on the ownership and operation of offshore energy assets.” Source: RevenueBase Database · checked Sep 17, 2026
2	Boskalis Subsea Services	Partial evidence	Aberdeen, United KingdomHQ checked Sep 17, 2026	201-500	516 contacts →
	Partial evidence “Boskalis Subsea Services is a world-leading provider of specialist subsea solutions for the offshore energy industry, seamlessly integrating services to deliver optimum results.” Source: RevenueBase Database · checked Sep 17, 2026
3	Global Marine	Partial evidence	Chelmsford, United KingdomHQ checked Sep 17, 2026	501-1,000	339 contacts →
	Partial evidence “Global Marine is part of the Global Marine Group, and is a market leader in subsea cable installation and maintenance solutions to the telecoms and oil & gas sectors.” Source: RevenueBase Database · checked Sep 17, 2026
4	2h Offshore	Partial evidence	Woking, United KingdomHQ checked Sep 17, 2026	201-500	286 contacts →
	Partial evidence “2H Offshore delivers leading-edge advanced systems engineering for all types of offshore structures in the oil and gas and renewable energy sectors.” Source: RevenueBase Database · checked Sep 17, 2026
5	Claxton Engineering Services	Strong evidence	Great Yarmouth, United KingdomHQ checked Sep 17, 2026	201-500	279 contacts →
	Strong evidence “Claxton, an AF Gruppen Company, combines decades of industry experience, proprietary technology, and exceptional service quality to cut through offshore installation and…” Source: RevenueBase Database · checked Sep 17, 2026
6	Ledwood Mechanical Engineering LTD	Indirect evidence	Pembrokeshire, United KingdomHQ checked Sep 17, 2026	501-1,000	266 contacts →
	Indirect evidence “Ledwood is an independent engineering, fabrication and construction company specialising in the delivery of complex projects across the oil, gas, process and energy industries.” Source: RevenueBase Database · checked Sep 17, 2026
7	Radius Systems	Partial evidence	South Normanton, United KingdomHQ checked Sep 17, 2026	201-500	195 contacts →
	Partial evidence “Part of Radius Group Holdings, Radius Systems is proud to be the pipeline experts for the gas, water, energy, power and telecoms sectors.” Source: RevenueBase Database · checked Sep 17, 2026
8	Acteon	Partial evidence	Norwich, United KingdomHQ checked Sep 17, 2026	1,001-5,000	192 contacts →
	Partial evidence “Acteon delivers data-driven, engineering-led solutions across the lifecycle of offshore energy infrastructure.” Source: RevenueBase Database · checked Sep 17, 2026
9	OSBIT	Indirect evidence	Northumberland, United KingdomHQ checked Sep 17, 2026	201-500	171 contacts →
	Indirect evidence “Osbit’s vision is to unlock a clean energy future by creating smarter technology.” Source: RevenueBase Database · checked Sep 17, 2026
10	Aquaterra Energy	Partial evidence	Norwich, United KingdomHQ checked Sep 17, 2026	51-200	167 contacts →
	Partial evidence “Aquaterra Energy provides intelligently engineered products and services for well access and offshore developments - supporting efficient operations across the full life cycle of…” Source: RevenueBase Database · checked Sep 17, 2026
11	Eastgate Engineering	Partial evidence	Thornaby-on-tees, United KingdomHQ checked Sep 17, 2026	201-500	163 contacts →
	Partial evidence “Eastgate Engineering is an Electrical and Instrumentation contractor that delivers complex, high-risk infrastructure projects with cost certainty, without compromising safety or…” Source: RevenueBase Database · checked Sep 17, 2026
12	Enshore Subsea	Indirect evidence	Blyth, United KingdomHQ checked Sep 17, 2026	51-200	161 contacts →
	Indirect evidence “The globally trusted delivery experts in installing and protecting critical subsea infrastructure.” Source: RevenueBase Database · checked Sep 17, 2026
13	Seatrium Offshore Renewable Services LTD	Partial evidence	Lowestoft, United KingdomHQ checked Sep 17, 2026	n/a	155 contacts →
	Partial evidence “Seatrium Offshore Renewable Services Ltd (Seatrium ORS) has over 55 years of unparalleled expertise and experience in the offshore energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
14	Maritime Developments Limited	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 17, 2026	51-200	148 contacts →
	Indirect evidence “MDL - We Build Innovation.” Source: RevenueBase Database · checked Sep 17, 2026
15	Interocean Marine Services	Partial evidence	Portlethen, United KingdomHQ checked Sep 17, 2026	51-200	134 contacts →
	Partial evidence “Interocean provide a comprehensive range of services to the offshore oil and gas, marine, and renewable sectors.” Source: RevenueBase Database · checked Sep 17, 2026
16	Cavendish Northern Limited	Partial evidence	Billingham, United KingdomHQ checked Sep 17, 2026	51-200	111 contacts →
	Partial evidence “CAVENDISH NORTHERN LTD (CNL) ARE A PIPEWORK AND MECHANICAL INSTALLATION CONTRACTING COMPANY.” Source: RevenueBase Database · checked Sep 17, 2026
17	Derrick Services UK LTD	Indirect evidence	Great Yarmouth, United KingdomHQ checked Sep 17, 2026	51-200	111 contacts →
	Indirect evidence “Derrick Service UK Ltd (DSL) is a diversified oil & gas construction company which provides a broad range of products and services to the market from our Worldwide locations.” Source: RevenueBase Database · checked Sep 17, 2026
18	Foundocean	Indirect evidence	Livingston, United KingdomHQ checked Sep 17, 2026	51-200	85 contacts →
	Indirect evidence “FoundOcean boasts 60 years’ experience of providing green and brown field services to the marine construction industries.” Source: RevenueBase Database · checked Sep 17, 2026
19	Copius Group	Partial evidence	Newtownabbey, United KingdomHQ checked Sep 17, 2026	201-500	81 contacts →
	Partial evidence “Copius Group is a premier provider of construction and engineering services, delivering comprehensive solutions for offshore and onshore projects across the globe.” Source: RevenueBase Database · checked Sep 17, 2026
20	Armultra Limited	Indirect evidence	Great Yarmouth, United KingdomHQ checked Sep 17, 2026	51-200	81 contacts →
	Indirect evidence “Armultra Ltd is a privately owned business and has been providing engineering solutions from its facility in Great Yarmouth since 1985.” Source: RevenueBase Database · checked Sep 17, 2026
21	JEE	Indirect evidence	Tonbridge, United KingdomHQ checked Sep 17, 2026	51-200	77 contacts →
	Indirect evidence “Jee is a leading independent multi-discipline subsea engineering and training company, delivering integrated services to the oil, gas and renewables industries.” Source: RevenueBase Database · checked Sep 17, 2026
22	Premtech LTD	Indirect evidence	Ashby-de-la-zouch, United KingdomHQ checked Sep 17, 2026	51-200	74 contacts →
	Indirect evidence “Premtech is a dynamic company whose primary focus is to provide engineering, consultancy and design management services to all companies involved in the development and ownership…” Source: RevenueBase Database · checked Sep 17, 2026
23	Offshore Marine Management Holdings LTD	Partial evidence	Bristol, United KingdomHQ checked Sep 17, 2026	11-50	60 contacts →
	Partial evidence “Offshore Marine Management Holdings is a leading group of companies specialising in the delivery of subsea solutions to the offshore renewables, grid, telecommunications and oil &…” Source: RevenueBase Database · checked Sep 17, 2026
24	SRP	Partial evidence	Woking, United KingdomHQ checked Sep 17, 2026	11-50	56 contacts →
	Partial evidence “We design and supply products for the offshore and subsea industries; specialising in subsea and riser applications enduring fatigue, high strength steel and moving parts.” Source: RevenueBase Database · checked Sep 17, 2026
25	Afslowestoft	Indirect evidence	Lowestoft, United KingdomHQ checked Sep 17, 2026	51-200	54 contacts →
	Indirect evidence “AFS Ltd is an independently owned manufacturing company.” Source: RevenueBase Database · checked Sep 17, 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: offshore pipeline installation contractors. 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 offshore pipeline installation contractors.
Partial evidence: Its own public description names part of offshore pipeline installation contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore pipeline installation contractors. 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 220 offshore pipeline installation contractors based in the United Kingdom

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Offshore pipeline installation contractors based in the United Kingdom at a glance

As of Sep 17, 2026

33.5%Verified-email coverage

44.2Average contacts per company

11-50Median size (employees)

16.8%Largest-city concentration · Aberdeen

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

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 220 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 offshore pipeline installation contractors, 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 “offshore pipeline installation contractors”. 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 offshore pipeline installation contractors), 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 offshore pipeline installation contractors, 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, 3,257 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 17, 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.

Offshore pipeline installation contractors by metro

Offshore pipeline installation contractors in Aberdeen37

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 offshore pipeline installation contractors, 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 offshore pipeline installation contractors are there based in the United Kingdom?

RevenueBase identified 220 offshore pipeline installation contractors 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?

Altera Infrastructure, headquartered in Prospect Park, tops this list with the largest team on record.

Which city has the most offshore pipeline installation contractors?

Aberdeen leads with 37 headquartered companies, followed by London (11) and Bridge Of Don (6).

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 3,257 verified decision-maker contacts tracked across these 220 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 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 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.