Company lists · Data refreshed September 2026

Top 25 Offshore drilling rig installation companies based in the United Kingdom

Name: Offshore drilling rig 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 15, 2026 216 companies tracked

RevenueBase identified 216 offshore drilling rig installation companies headquartered in the United Kingdom as of September 2026 and tracks 23,800 professional contacts across them, including 4,854 with verified work emails. Aberdeen is the largest hub.

This list covers offshore drilling rig 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 15, 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 15, 2026 86% judged on-target in blind review

216Companies

23,800Contacts tracked

4,854Verified emails

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The 25 largest offshore drilling rig installation companies based in the United Kingdom

Ranked by team size

Top 25 of 216 offshore drilling rig installation companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to offshore drilling rig 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	Ensco PLC	Indirect evidence	London, United KingdomHQ checked Sep 15, 2026	5,001-10,000	2,679 contacts →
	Indirect evidence “We Are Valaris With decades of expertise and strategic commitment built on efficiency, capability and ingenuity, our sights are continually set toward a future built with purpose…” Source: RevenueBase Database · checked Sep 15, 2026
2	Odfjell Drilling	Partial evidence	Aberdeen, United KingdomHQ checked Sep 15, 2026	1,001-5,000	1,864 contacts →
	Partial evidence “Odfjell Drilling is an international drilling company with around 1,500 employees with operations around the world.” Source: RevenueBase Database · checked Sep 15, 2026
3	Borr Drilling	Strong evidence	London, United KingdomHQ checked Sep 15, 2026	1,001-5,000	1,699 contacts →
	Strong evidence “Borr Drilling Limited is an offshore shallow-water drilling contractor providing worldwide offshore drilling services to the oil and gas industry.” Source: RevenueBase Database · checked Sep 15, 2026
4	Altera Infrastructure	Partial evidence	Aberdeenshire, United KingdomHQ checked Sep 15, 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 15, 2026
5	Dolphin Drilling	Strong evidence	Aberdeen, United KingdomHQ checked Sep 15, 2026	201-500	694 contacts →
	Strong evidence “Dolphin Drilling is the offshore drilling pioneer of the past and for the future.” Source: RevenueBase Database · checked Sep 15, 2026
6	Boskalis Subsea Services	Partial evidence	Aberdeen, United KingdomHQ checked Sep 15, 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 15, 2026
7	Ashtead Technology	Indirect evidence	Westhill, United KingdomHQ checked Sep 15, 2026	501-1,000	368 contacts →
	Indirect evidence “Established in 1985, Ashtead Technology has grown organically and through strategic acquisition to become the leading provider of equipment rental solutions, advanced underwater…” Source: RevenueBase Database · checked Sep 15, 2026
8	2h Offshore	Partial evidence	Woking, United KingdomHQ checked Sep 15, 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 15, 2026
9	Motive Offshore Group LTD	Partial evidence	Banff, United KingdomHQ checked Sep 15, 2026	201-500	283 contacts →
	Partial evidence “Motive Offshore Group specialises in the design, manufacture, rental, and inspection of marine and lifting equipment.” Source: RevenueBase Database · checked Sep 15, 2026
10	Ledwood Mechanical Engineering LTD	Indirect evidence	Pembrokeshire, United KingdomHQ checked Sep 15, 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 15, 2026
11	Swire Oilfield Services	Partial evidence	Aberdeen, United KingdomHQ checked Sep 15, 2026	501-1,000	202 contacts →
	Partial evidence “Swire Energy Services, part of the global conglomerate, the Swire group, is the world's largest supplier of specialist offshore cargo carrying units to the global energy industry…” Source: RevenueBase Database · checked Sep 15, 2026
12	Acteon	Partial evidence	Norwich, United KingdomHQ checked Sep 15, 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 15, 2026
13	Wilton Engineering	Indirect evidence	Middlesbrough, United KingdomHQ checked Sep 15, 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 15, 2026
14	OSBIT	Indirect evidence	Northumberland, United KingdomHQ checked Sep 15, 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 15, 2026
15	Aquaterra Energy	Partial evidence	Norwich, United KingdomHQ checked Sep 15, 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 15, 2026
16	Seatrium Offshore Renewable Services LTD	Partial evidence	Lowestoft, United KingdomHQ checked Sep 15, 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 15, 2026
17	Maritime Developments Limited	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 15, 2026	51-200	148 contacts →
	Indirect evidence “MDL - We Build Innovation.” Source: RevenueBase Database · checked Sep 15, 2026
18	Interocean Marine Services	Partial evidence	Portlethen, United KingdomHQ checked Sep 15, 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 15, 2026
19	Aquaterra Group LTD	Indirect evidence	Kintore, United KingdomHQ checked Sep 15, 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 15, 2026
20	Derrick Services UK LTD	Indirect evidence	Great Yarmouth, United KingdomHQ checked Sep 15, 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 15, 2026
21	James Fisher Offshore	Partial evidence	Oldmeldrum, United KingdomHQ checked Sep 15, 2026	51-200	107 contacts →
	Partial evidence “James Fisher Offshore (JFO) is an international supplier of marine back deck, specialist subsea equipment and engineering services supporting the global subsea contractors across…” Source: RevenueBase Database · checked Sep 15, 2026
22	Awilco Drilling	Strong evidence	Aberdeen, United KingdomHQ checked Sep 15, 2026	51-200	88 contacts →
	Strong evidence “Awilco Drilling Limited was incorporated in December 2009 in connection with the acquisition of the two semi submersible drilling rigs, WilPhoenix (previously Arctic II) and…” Source: RevenueBase Database · checked Sep 15, 2026
23	Foundocean	Indirect evidence	Livingston, United KingdomHQ checked Sep 15, 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 15, 2026
24	Copius Group	Partial evidence	Newtownabbey, United KingdomHQ checked Sep 15, 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 15, 2026
25	Armultra Limited	Indirect evidence	Great Yarmouth, United KingdomHQ checked Sep 15, 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 15, 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 drilling rig 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 offshore drilling rig installation companies.
Partial evidence: Its own public description names part of offshore drilling rig installation companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore drilling rig 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 216 offshore drilling rig installation companies based in the United Kingdom

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Offshore drilling rig installation companies based in the United Kingdom at a glance

As of Sep 15, 2026

20.4%Verified-email coverage

110.2Average contacts per company

11-50Median size (employees)

23.1%Largest-city concentration · Aberdeen

Sep 15, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 216 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 drilling rig 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 “offshore drilling rig 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 offshore drilling rig 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 offshore drilling rig 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, 4,854 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 15, 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 drilling rig installation companies by metro

Offshore drilling rig installation companies in Aberdeen50
Offshore drilling rig installation companies in London25

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 drilling rig 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 offshore drilling rig installation companies are there based in the United Kingdom?

RevenueBase identified 216 offshore drilling rig 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?

Ensco PLC, headquartered in London, tops this list with the largest team on record.

Which city has the most offshore drilling rig installation companies?

Aberdeen leads with 50 headquartered companies, followed by London (25) and Westhill (5).

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 4,854 verified decision-maker contacts tracked across these 216 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 15, 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.