Company lists · Data refreshed November 2026

Top 25 Subsea intervention services worldwide

RevenueBase identified 2,505 company matches for subsea intervention services worldwide as of November 2026 and tracks 146,398 professional contacts across them, including 26,537 with verified work emails. The United Kingdom is the largest market and Aberdeen the largest hub.

This list covers company matches for subsea intervention services worldwide, 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. Country and city lists for subsea intervention services follow the table.

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
2,505Companies
146,398Contacts tracked
26,537Verified emails
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The 25 largest subsea intervention services worldwide

Ranked by team size
Top 25 of 2,505 company matches for subsea intervention services worldwide, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchHouston, TX, United StatesHQ recorded Nov 6, 202610001+12,787 contacts →

Exact match

“Oceaneering is a global technology company delivering engineered services and products and robotic solutions to the offshore energy, defense, aerospace, and manufacturing…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchUnited KingdomHQ recorded Nov 6, 202610001+12,130 contacts →

Exact match

“Technip is a former company that was separated into two independent companies: TechnipFMC and Technip Energies, which now operate with no capital ties.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchHouston, TX, United StatesHQ recorded Nov 6, 202610001+6,954 contacts →

Exact match

“SLB OneSubsea is the world’s leading subsea technology and solutions provider, focused on accelerating innovation to improve subsea asset performance, while increasing energy…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchHouston, United StatesHQ recorded Nov 6, 20265,001-10,0006,924 contacts →

Exact match

“Long recognized for extraordinary performance, superb safety and long-standing partnerships, and now incorporating Frank’s International, Expro is focused on enabling our…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchBergen, NorwayHQ recorded Nov 6, 20265,001-10,0003,303 contacts →

Exact match

“With a multi-national workforce of over 5,700 personnel, DOF is an international group of companies which owns and operates a fleet of modern offshore/subsea vessels, with an…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchChâtel-saint-denis, United StatesHQ recorded Nov 6, 20261,001-5,0002,837 contacts →

Exact match

“Allseas is a world-leading contractor in the offshore energy market.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchBrazilHQ recorded Nov 6, 2026n/a2,408 contacts →

Exact match

“Rov company.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchRio De Janeiro, BrazilHQ recorded Nov 6, 20261,001-5,0002,402 contacts →

Exact match

“A OCYAN atua há décadas na prestação de serviços para o setor de óleo e gás upstream, estruturando suas operações em três frentes de atuação.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchNiterói, BrazilHQ recorded Nov 6, 20261,001-5,0001,847 contacts →

Exact match

“O Grupo CBO é uma das maiores empresas de apoio marítimo do Brasil.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchHouston, TX, United StatesHQ recorded Nov 6, 20261,001-5,0001,814 contacts →

Exact match

“Helix Energy Solutions, headquartered in Houston, Texas, is an international offshore energy services company that provides specialty services to the offshore energy industry…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchÇankaya, TürkiyeHQ recorded Nov 6, 2026501-1,0001,813 contacts →

Exact match

“TP-OTC is established to provide all engineering and technology services for offshore operations in oil and gas industry.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchOslo, NorwayHQ recorded Nov 6, 20261,001-5,0001,607 contacts →

Exact match

“DeepOcean is a technology-driven, independent solution provider in the ocean space.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchAbu Dhabi, United Arab EmiratesHQ recorded Nov 6, 2026201-5001,344 contacts →

Exact match

“(Underwater Engineering) S.A.L was established in 1976.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchSingaporeHQ recorded Nov 6, 20261,001-5,000853 contacts →

Exact match

“Established since 1975, Swire Pacific Offshore (SPO) was a trusted marine services provider that pride itself on delivering safe, high quality, reliable and sustainable Marine…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchOslo, NorwayHQ recorded Nov 6, 2026501-1,000837 contacts →

Exact match

“AGR – an Aqualis company – is a multidisciplinary consultancy, specialising in drilling & wells, subsurface, marine and subsea solutions, resourcing, technical safety and software…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchAbu Dhabi, United Arab EmiratesHQ recorded Nov 6, 20261,001-5,000816 contacts →

Exact match

“With offices in Abu Dhabi, Dubai, Qatar and Singapore, Allianz Middle East Ship Management LLC(Allianz-ME) is a well-established marine contractors providing modern Offshore…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchHouston, AL, United StatesHQ recorded Nov 6, 20261,001-5,000798 contacts →

Exact match

“Wellbore Integrity Solutions provides superior technologies and global service domain expertise, enabling our customers to enhance the full lifecycle of their wells by solving…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchDubai, United Arab EmiratesHQ recorded Nov 6, 2026n/a775 contacts →

Exact match

“Established in 1997, we operate an extensive fleet of Offshore Supply Vessels that service the Oil and Gas industry in the Middle East, South East Asia, Africa, India and the Gulf…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchYantai, ChinaHQ recorded Nov 6, 202610001+759 contacts →

Exact match

“Yantai CIMC Raffles Offshore Technology Group Co, Ltd.(“CIMC Raffles”) is a leading offshore engineering and high-end marine equipment group in China, with a strong focus on the…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchSingaporeHQ recorded Nov 6, 2026201-500741 contacts →

Exact match

“The Pacific Radiance Group of Companies is an established owner and operator of offshore vessels and a provider of subsea services, shipyard services, marine equipment as well as…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchMumbai, IndiaHQ recorded Nov 6, 20261,001-5,000715 contacts →

Exact match

“The GREATSHIP GROUP is a provider of quality offshore oilfield services, owning and operating a comprehensive range of new generation, technologically advanced vessels and modern…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchMacaé, BrazilHQ recorded Nov 6, 2026501-1,000687 contacts →

Exact match

“A SISTAC é líder no segmento de inspeção, manutenção e reparo offshore na indústria de óleo e gás no Brasil, através de acesso com embarcações de apoio marítimo, mergulhadores…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchHouston, United StatesHQ recorded Nov 6, 20261,001-5,000649 contacts →

Exact match

“Worldwide Oilfield Machine (WOM) is a multinational equipment manufacturer specializing in solutions for drilling, testing, production and intervention operations.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchSharjah, United Arab EmiratesHQ recorded Nov 6, 2026501-1,000643 contacts →

Exact match

“Unique Group is a leading specialist and integrated engineering solutions provider across the global subsea, renewables, oil and gas, and defence industries.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchRio De Janeiro - Rj, IndiaHQ recorded Nov 6, 20261,001-5,000603 contacts →

Exact match

“Seagems is a Brazilian company specialized in subsea services, a joint venture between two international key players in their markets, Paratus Energy and Vantris Energy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 2,505 subsea intervention services worldwide

See the full list, filter by size, metro and specialty, and access 26,537 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Subsea intervention services worldwide at a glance

As of Nov 6, 2026
18.1%Verified-email coverage
58.4Average contacts per company
11-50Median size (employees)
3.8%Largest-city concentration · Aberdeen
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
877
11-50
903
51-200
450
201-500
142
501-1,000
52
1,001-5,000
47
5,001-10,000
5
10001+
12

Email recency is reported on each country list linked below.

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.
Coverage
Every country. Country and city lists for subsea intervention services are linked below.
What qualifies
Company records worldwide whose business descriptions match “subsea intervention 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. 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 26,537 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 intervention services by location

21 lists · largest first

Every Subsea intervention services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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

How many subsea intervention services are there worldwide?

RevenueBase identified 2,505 company matches for subsea intervention services worldwide 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?

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

Which country has the most subsea intervention services?

The United Kingdom leads with 376 companies, followed by the United States (258) and Norway (153). Every subsea intervention services list by country and city is linked on this page.

Which city has the most subsea intervention services?

Aberdeen leads with 96 company records, followed by Singapore (80) and Houston (76).

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 26,537 professional contacts with verified work emails tracked across these 2,505 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.