Company lists · Data refreshed September 2026

Top 25 Platform topsides installation companies based in the United Kingdom

Name: Platform topsides installation 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 29, 2026 117 companies tracked

RevenueBase identified 117 platform topsides installation companies headquartered in the United Kingdom as of September 2026 and tracks 4,770 professional contacts across them, including 1,302 with verified work emails. Aberdeen is the largest hub.

This list covers platform topsides installation 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 29, 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 29, 2026 86% judged on-target in blind review

117Companies

4,770Contacts tracked

1,302Verified emails

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The 25 largest platform topsides installation companies based in the United Kingdom

Ranked by team size

Top 25 of 117 platform topsides installation companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to platform topsides installation 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	Altera Infrastructure	Indirect evidence	Aberdeenshire, United KingdomHQ checked Sep 29, 2026	501-1,000	955 contacts →
	Indirect 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 29, 2026
2	2h Offshore	Indirect evidence	Woking, United KingdomHQ checked Sep 29, 2026	201-500	286 contacts →
	Indirect 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 29, 2026
3	Claxton Engineering Services	Partial evidence	Great Yarmouth, United KingdomHQ checked Sep 29, 2026	201-500	279 contacts →
	Partial 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 29, 2026
4	Ledwood Mechanical Engineering LTD	Indirect evidence	Pembrokeshire, United KingdomHQ checked Sep 29, 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 29, 2026
5	Acteon	Indirect evidence	Norwich, United KingdomHQ checked Sep 29, 2026	1,001-5,000	192 contacts →
	Indirect evidence “Acteon delivers data-driven, engineering-led solutions across the lifecycle of offshore energy infrastructure.” Source: RevenueBase Database · checked Sep 29, 2026
6	Wilton Engineering	Indirect evidence	Middlesbrough, United KingdomHQ checked Sep 29, 2026	201-500	188 contacts →
	Indirect evidence “Wilton Engineering is a multi-disciplined Engineering Services provider based on a 113 acre site by the River Tees in Middlesbrough, North-East England.” Source: RevenueBase Database · checked Sep 29, 2026
7	Aquaterra Energy	Indirect evidence	Norwich, United KingdomHQ checked Sep 29, 2026	51-200	167 contacts →
	Indirect 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 29, 2026
8	Seatrium Offshore Renewable Services LTD	Indirect evidence	Lowestoft, United KingdomHQ checked Sep 29, 2026	n/a	155 contacts →
	Indirect 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 29, 2026
9	Maritime Developments Limited	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 29, 2026	51-200	148 contacts →
	Indirect evidence “MDL - We Build Innovation.” Source: RevenueBase Database · checked Sep 29, 2026
10	Interocean Marine Services	Indirect evidence	Portlethen, United KingdomHQ checked Sep 29, 2026	51-200	134 contacts →
	Indirect evidence “Interocean provide a comprehensive range of services to the offshore oil and gas, marine, and renewable sectors.” Source: RevenueBase Database · checked Sep 29, 2026
11	Aquaterra Group LTD	Indirect evidence	Kintore, United KingdomHQ checked Sep 29, 2026	11-50	123 contacts →
	Indirect evidence “RELIABLE \| RESOURCEFUL \| READY We continually raise the bar by challenging ourselves and our clients to enable safe and efficient performance.” Source: RevenueBase Database · checked Sep 29, 2026
12	Derrick Services UK LTD	Indirect evidence	Great Yarmouth, United KingdomHQ checked Sep 29, 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 29, 2026
13	Modutec	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 29, 2026	51-200	103 contacts →
	Indirect evidence “Repair, Conversion and New Build of Marine and Offshore Living Quarters and Technical Buildings.” Source: RevenueBase Database · checked Sep 29, 2026
14	Copius Group	Indirect evidence	Newtownabbey, United KingdomHQ checked Sep 29, 2026	201-500	81 contacts →
	Indirect 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 29, 2026
15	Armultra Limited	Indirect evidence	Great Yarmouth, United KingdomHQ checked Sep 29, 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 29, 2026
16	Relay Engineering	Indirect evidence	Plymouth, United KingdomHQ checked Sep 29, 2026	51-200	81 contacts →
	Indirect evidence “Established over 30 years ago, Relay was incorporated in 1989 as Relay South-West, later changing its name to Relay Engineering in January 2007.” Source: RevenueBase Database · checked Sep 29, 2026
17	RDS	Partial evidence	Aberdeen, United KingdomHQ checked Sep 29, 2026	1,001-5,000	70 contacts →
	Partial evidence “RDS is an engineering specialist working for oil and gas companies and major topsides and drilling contractors.” Source: RevenueBase Database · checked Sep 29, 2026
18	Aventus Energy	Indirect evidence	Alness, United KingdomHQ checked Sep 29, 2026	11-50	57 contacts →
	Indirect evidence “Aventus Energy Ltd is a recently formed Scottish Highland based company operating from our bespoke premises in Alness.” Source: RevenueBase Database · checked Sep 29, 2026
19	Afslowestoft	Indirect evidence	Lowestoft, United KingdomHQ checked Sep 29, 2026	51-200	54 contacts →
	Indirect evidence “AFS Ltd is an independently owned manufacturing company.” Source: RevenueBase Database · checked Sep 29, 2026
20	Land And Marine Engineering Limited	Indirect evidence	Bromborough, United KingdomHQ checked Sep 29, 2026	201-500	52 contacts →
	Indirect evidence “Land and Marine Engineering Limited, a part of the Murphy Group of companies is an international engineering and construction company.” Source: RevenueBase Database · checked Sep 29, 2026
21	Aquatic Engineering & Construction LTD	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 29, 2026	51-200	48 contacts →
	Indirect evidence “Aquatic is unique; they’re the only independent company in the world that has a comprehensive range of modular carousel, drive, and tensioner systems that can be transported…” Source: RevenueBase Database · checked Sep 29, 2026
22	Pruce Newman	Indirect evidence	Wymondham, United KingdomHQ checked Sep 29, 2026	51-200	46 contacts →
	Indirect evidence “Over 50 years of safety, quality and trust!” Source: RevenueBase Database · checked Sep 29, 2026
23	Quanta EPC	Indirect evidence	Cramlington, United KingdomHQ checked Sep 29, 2026	51-200	42 contacts →
	Indirect evidence “Quanta delivers engineering, procurement and construction services to the energy industry, working in partnership with our clients to provide integrated end to end solutions…” Source: RevenueBase Database · checked Sep 29, 2026
24	Enerfac Solutions	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	38 contacts →
	Indirect evidence “Enerfac Solutions is a global leader in Engineering, Procurement, Construction, and Commissioning (EPCC), delivering innovative, reliable, and technologically advanced services…” Source: RevenueBase Database · checked Sep 29, 2026
25	LEF LTD	Indirect evidence	Lerwick, United KingdomHQ checked Sep 29, 2026	11-50	36 contacts →
	Indirect evidence “Engineering Trust since 1994 LEF is a market leader in engineering and fabrication for the Oil & Gas, Decommissioning, Renewables, Marine and Aquaculture sectors.” Source: RevenueBase Database · checked Sep 29, 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: platform topsides installation 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 platform topsides installation companies.
Partial evidence: Its own public description names part of platform topsides installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name platform topsides installation 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 117 platform topsides installation companies based in the United Kingdom

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Platform topsides installation companies based in the United Kingdom at a glance

As of Sep 29, 2026

27.3%Verified-email coverage

40.8Average contacts per company

11-50Median size (employees)

22.2%Largest-city concentration · Aberdeen

Sep 29, 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 117 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 platform topsides installation 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 “platform topsides installation 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 platform topsides installation 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 platform topsides installation 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, 1,302 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 29, 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.

Platform topsides installation companies by metro

Platform topsides installation companies in Aberdeen26

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 platform topsides installation 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 platform topsides installation companies are there based in the United Kingdom?

RevenueBase identified 117 platform topsides installation 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?

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

Which city has the most platform topsides installation companies?

Aberdeen leads with 26 headquartered companies, followed by London (6) and Bridge Of Don (3).

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 1,302 verified decision-maker contacts tracked across these 117 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 29, 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.