Company lists · Data refreshed November 2026

Top 24 Subsea installation services based in the United Kingdom

Name: Subsea installation services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 431 companies tracked

RevenueBase identified 431 company matches for subsea installation services associated with the United Kingdom as of November 2026 and tracks 18,601 professional contacts across them, including 5,767 with verified work emails. Aberdeen is the largest hub.

This list covers company matches for subsea installation services 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 November 6, 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 Nov 6, 2026 How this list was built

431Companies

18,601Contacts tracked

5,767Verified emails

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The 24 largest subsea installation services based in the United Kingdom

Ranked by team size

Top 24 of 431 company matches for subsea installation services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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	Altera Infrastructure	Exact match	Aberdeenshire, United KingdomHQ recorded Nov 6, 2026	501-1,000	972 contacts →
	Exact match “Altera Infrastructure is a leading global energy infrastructure services group focused on the ownership and operation of offshore energy assets.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Boskalis Subsea Services	Exact match	Aberdeen, United KingdomHQ recorded Nov 6, 2026	201-500	564 contacts →
	Exact match “Boskalis Subsea Services is a world-leading provider of specialist subsea solutions for the offshore energy industry, seamlessly integrating services to deliver optimum results.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Ashtead Technology	Exact match	Westhill, United KingdomHQ recorded Nov 6, 2026	501-1,000	398 contacts →
	Exact match “Established in 1985, Ashtead Technology has grown organically and through strategic acquisition to become the leading provider of equipment rental solutions, advanced underwater…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Global Marine	Exact match	Chelmsford, United KingdomHQ recorded Nov 6, 2026	501-1,000	371 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Acteon	Exact match	Norwich, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	193 contacts →
	Exact match “Acteon delivers data-driven, engineering-led solutions across the lifecycle of offshore energy infrastructure.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Enshore Subsea	Exact match	Blyth, United KingdomHQ recorded Nov 6, 2026	51-200	190 contacts →
	Exact match “The globally trusted delivery experts in installing and protecting critical subsea infrastructure.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Seatrium Offshore Renewable Services LTD	Exact match	Lowestoft, United KingdomHQ recorded Nov 6, 2026	n/a	165 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 · Nov 6, 2026 · View company records in RevenueBase
8	Aquaterra Energy	Exact match	Norwich, United KingdomHQ recorded Nov 6, 2026	51-200	162 contacts →
	Exact match “Aquaterra Energy provides intelligently engineered products and services for well access and offshore developments - supporting efficient operations across the full life cycle of…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Interocean Marine Services	Exact match	Glasgow, United KingdomHQ recorded Nov 6, 2026	51-200	150 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 · Nov 6, 2026 · View company records in RevenueBase
10	Maritime Developments Limited	Exact match	Aberdeen, United KingdomHQ recorded Nov 6, 2026	51-200	147 contacts →
	Exact match “MDL - We Build Innovation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Aquaterra Group LTD	Exact match	Kintore, United KingdomHQ recorded Nov 6, 2026	11-50	138 contacts →
	Exact match “RELIABLE \| RESOURCEFUL \| READY We continually raise the bar by challenging ourselves and our clients to enable safe and efficient performance.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Derrick Services UK LTD	Exact match	Great Yarmouth, United KingdomHQ recorded Nov 6, 2026	51-200	118 contacts →
	Exact match “Derrick Service UK Ltd (DSL), an OES Group Company, is a diversified oil & gas construction company that provides a broad range of products and services from our Worldwide…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	MPI Offshore	Exact match	Stokesley, United KingdomHQ recorded Nov 6, 2026	51-200	113 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 · Nov 6, 2026 · View company records in RevenueBase
14	Andrews Survey	Exact match	Aberdeen, United KingdomHQ recorded Nov 6, 2026	51-200	94 contacts →
	Exact match “Andrews Survey is predominantly active in construction and trenching support, ROV pipeline inspection support, renewable energy and wind-farm installation support and rig…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Shearwater Marine Services	Exact match	Sandbank, United KingdomHQ recorded Nov 6, 2026	51-200	93 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 · Nov 6, 2026 · View company records in RevenueBase
16	Foundocean	Exact match	Livingston, United KingdomHQ recorded Nov 6, 2026	51-200	90 contacts →
	Exact match “FoundOcean boasts 60 years’ experience of providing green and brown field services to the marine construction industries.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	JEE	Exact match	Tonbridge, United KingdomHQ recorded Nov 6, 2026	51-200	83 contacts →
	Exact match “Jee is a leading independent multi-discipline subsea engineering and training company, delivering integrated services to the oil, gas and renewables industries.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Holyhead Towing Co. LTD	Exact match	Holyhead, United KingdomHQ recorded Nov 6, 2026	51-200	83 contacts →
	Exact match “Holyhead Towing Company (Est.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Global Marine Group	Exact match	Chelmsford, United KingdomHQ recorded Nov 6, 2026	51-200	81 contacts →
	Exact match “The Global Marine Group is a leading independent provider of submarine cable solutions offering a broad range of services including consultancy, installation and maintenance…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	James Fisher Offshore	Exact match	Oldmeldrum, United KingdomHQ recorded Nov 6, 2026	51-200	81 contacts →
	Exact match “James Fisher Offshore (JFO) is an international supplier of marine back deck, specialist subsea equipment and engineering services supporting the global subsea contractors across…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Etpm LTD	Exact match	Aberdeen, United KingdomHQ recorded Nov 6, 2026	11-50	73 contacts →
	Exact match “ETPM has developed a strong reputation for delivering an excellent standard of service to both our personnel and client base.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Film-Ocean	Exact match	Ellon, United KingdomHQ recorded Nov 6, 2026	51-200	71 contacts →
	Exact match “Film-Ocean provides innovative subsea solutions to the global offshore energy industry.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	First Marine Solutions	Exact match	Aberdeen, United KingdomHQ recorded Nov 6, 2026	51-200	62 contacts →
	Exact match “First Marine Solutions is a leading international energy service and equipment organisation with operations worldwide, We provide expertise, technology, techniques and support…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Offshore Marine Management Holdings LTD	Exact match	Bristol, United KingdomHQ recorded Nov 6, 2026	11-50	61 contacts →
	Exact match “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 &…” Recorded in the RevenueBase company graph · Nov 6, 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 “subsea installation services”. 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 24 of 431 subsea installation services based in the United Kingdom

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Subsea installation services based in the United Kingdom at a glance

As of Nov 6, 2026

31.0%Verified-email coverage

43.2Average contacts per company

11-50Median size (employees)

19.5%Largest-city concentration · Aberdeen

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

186

11-50

144

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 431 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 “subsea installation services” 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 5,767 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 November 6, 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.

Subsea installation services by metro

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 “subsea installation services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many subsea installation services are there based in the United Kingdom?

RevenueBase identified 431 company matches for subsea installation services associated with the United Kingdom as of November 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?

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

Which city has the most subsea installation services?

Aberdeen leads with 84 company records, followed by London (26) and Lowestoft (9).

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 5,767 professional contacts with verified work emails tracked across these 431 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 November 6, 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.