Company lists · Data refreshed September 2026

Top 25 Underwater construction firms based in the United Kingdom

Name: Underwater construction firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 262 companies tracked

RevenueBase identified 262 company matches for underwater construction firms associated with the United Kingdom as of September 2026 and tracks 6,900 professional contacts across them, including 2,188 with verified work emails. Aberdeen is the largest hub.

This list covers company matches for underwater construction firms 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 19, 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 19, 2026 How this list was built

262Companies

6,900Contacts tracked

2,188Verified emails

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The 25 largest underwater construction firms based in the United Kingdom

Ranked by team size

Top 25 of 262 company matches for underwater construction firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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	Boskalis Subsea Services	Exact match	Aberdeen, United KingdomHQ recorded Sep 19, 2026	201-500	516 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 · Sep 19, 2026 · View company records in RevenueBase
2	Boskalis Westminster LTD	Exact match	Fareham, United KingdomHQ recorded Sep 19, 2026	51-200	363 contacts →
	Exact match “Boskalis Westminster Ltd (BWL) is the leading dredging contractor in the UK and Ireland.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	Global Marine	Exact match	Chelmsford, United KingdomHQ recorded Sep 19, 2026	501-1,000	339 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 · Sep 19, 2026 · View company records in RevenueBase
4	Enshore Subsea	Exact match	Blyth, United KingdomHQ recorded Sep 19, 2026	51-200	161 contacts →
	Exact match “The globally trusted delivery experts in installing and protecting critical subsea infrastructure.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Ferguson Marine Port Glasgow Limited	Exact match	Port Glasgow, United KingdomHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
6	Interocean Marine Services	Exact match	Portlethen, United KingdomHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
7	Aquaterra Group LTD	Exact match	Kintore, United KingdomHQ recorded Sep 19, 2026	11-50	123 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 · Sep 19, 2026 · View company records in RevenueBase
8	James Fisher Offshore	Exact match	Oldmeldrum, United KingdomHQ recorded Sep 19, 2026	51-200	107 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 · Sep 19, 2026 · View company records in RevenueBase
9	Modutec	Exact match	Aberdeen, United KingdomHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
10	SMS Group Ship Repair Marine Interiors Marine Engineering SC Sqep	Exact match	Southampton, United KingdomHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
11	Shearwater Marine Services	Exact match	Sandbank, United KingdomHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
12	Foundocean	Exact match	Livingston, United KingdomHQ recorded Sep 19, 2026	51-200	85 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 · Sep 19, 2026 · View company records in RevenueBase
13	JEE	Exact match	Tonbridge, United KingdomHQ recorded Sep 19, 2026	51-200	77 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 · Sep 19, 2026 · View company records in RevenueBase
14	Holyhead Towing Co. LTD	Exact match	Holyhead, United KingdomHQ recorded Sep 19, 2026	51-200	75 contacts →
	Exact match “Holyhead Towing Company (Est.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	TMS LTD	Exact match	Devon, United KingdomHQ recorded Sep 19, 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 19, 2026 · View company records in RevenueBase
16	Offshore Marine Management Holdings LTD	Exact match	Bristol, United KingdomHQ recorded Sep 19, 2026	11-50	60 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 · Sep 19, 2026 · View company records in RevenueBase
17	Afslowestoft	Exact match	Lowestoft, United KingdomHQ recorded Sep 19, 2026	51-200	54 contacts →
	Exact match “AFS Ltd is an independently owned manufacturing company.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	GMC Limited	Exact match	Aberdeen, United KingdomHQ recorded Sep 19, 2026	11-50	54 contacts →
	Exact match “GMC Limited is an engineering, products, and services company specialising in the connection of tubular structures for offshore and subsea applications.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Land And Marine Engineering Limited	Exact match	Bromborough, United KingdomHQ recorded Sep 19, 2026	201-500	52 contacts →
	Exact match “Land and Marine Engineering Limited, a part of the Murphy Group of companies is an international engineering and construction company.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Dales Engineering Services LTD	Exact match	Peterhead, United KingdomHQ recorded Sep 19, 2026	51-200	49 contacts →
	Exact match “Since its inception in 1987, Dales Engineering Services Ltd has been providing fabrication, welding and machining solutions to both the onshore and offshore sectors.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	KD Marine LTD	Exact match	Aberdeen, United KingdomHQ recorded Sep 19, 2026	11-50	48 contacts →
	Exact match “KD Marine are a commercial diving contractor providing underwater intervention services to the offshore oil and gas industry.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Edwards Diving Services LTD	Exact match	Pontypridd, United KingdomHQ recorded Sep 19, 2026	51-200	46 contacts →
	Exact match “EDWARDS DIVING SERVICES LIMITED (EDS) is a specialist Marine & Civil Engineering company located in South Wales, United Kingdom.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	GPS Marine Contractors LTD	Exact match	Rochester, United KingdomHQ recorded Sep 19, 2026	51-200	44 contacts →
	Exact match “Marine Contractors specialising in: Marine Civil Engineering and Construction.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Southbay Civil Engineering LTD	Exact match	Gateshead, United KingdomHQ recorded Sep 19, 2026	51-200	43 contacts →
	Exact match “Over the last 20 years Southbay has developed a reputation as one of the UK’s leading maritime civil engineering contractors, undertaking technically challenging projects within…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	First Subsea	Exact match	Lancaster, United KingdomHQ recorded Sep 19, 2026	51-200	41 contacts →
	Exact match “With over 30 years' experience; First Subsea are a trusted provider of subsea products for the offshore wind, oil and gas industries.” Recorded in the RevenueBase company graph · Sep 19, 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 “underwater construction firms”. 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 262 underwater construction firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 2,188 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Underwater construction firms based in the United Kingdom at a glance

As of Sep 19, 2026

31.7%Verified-email coverage

26.3Average contacts per company

11-50Median size (employees)

9.2%Largest-city concentration · Aberdeen

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

114

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 262 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 “underwater construction firms” 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 2,188 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 19, 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 “underwater construction firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many underwater construction firms are there based in the United Kingdom?

RevenueBase identified 262 company matches for underwater construction firms 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?

Boskalis Subsea Services tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most underwater construction firms?

Aberdeen leads with 24 company records, followed by London (16) and Ellon (5).

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 2,188 professional contacts with verified work emails tracked across these 262 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 19, 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.