Company lists · Data refreshed September 2026

Top 25 Subsea installation contractors worldwide

Name: Subsea installation contractors worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 1,374 companies tracked

RevenueBase identified 1,374 subsea installation contractors worldwide as of September 2026 and tracks 133,645 professional contacts across them, including 32,117 with verified work emails and 0 with mobile numbers. The United Kingdom is the largest market and Houston the largest hub.

This list covers subsea installation contractors worldwide, 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 18, 2026. Country and city lists for subsea installation contractors follow the table.

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 18, 2026 86% judged on-target in blind review

1,374Companies

133,645Contacts tracked

32,117Verified emails

0Mobile numbers

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The 25 largest subsea installation contractors worldwide

Ranked by team size

Top 25 of 1,374 subsea installation contractors worldwide, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to subsea installation contractors: 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	Saipem	Indirect evidence	Milan, ItalyHQ checked Sep 18, 2026	10001+	34,095 contacts →
	Indirect evidence “Saipem is a global leader in the engineering and construction of major projects for the energy and infrastructure sectors, both offshore and onshore.” Source: RevenueBase Database · checked Sep 18, 2026
2	SBM Offshore	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 18, 2026	5,001-10,000	8,478 contacts →
	Indirect evidence “SBM Offshore is the world’s deepwater ocean-infrastructure expert.” Source: RevenueBase Database · checked Sep 18, 2026
3	EXPRO	Indirect evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	5,001-10,000	6,466 contacts →
	Indirect evidence “Long recognized for extraordinary performance, superb safety and long-standing partnerships, and now incorporating Frank’s International, Expro is focused on enabling our…” Source: RevenueBase Database · checked Sep 18, 2026
4	Lamprell	Indirect evidence	Sharjah, United Arab EmiratesHQ checked Sep 18, 2026	5,001-10,000	6,080 contacts →
	Indirect evidence “With 50 years of experience, Lamprell is a key player in the global offshore wind and oil & gas markets, delivering high-quality, complex energy infrastructure projects.” Source: RevenueBase Database · checked Sep 18, 2026
5	DOF	Partial evidence	Bergen, NorwayHQ checked Sep 18, 2026	5,001-10,000	2,942 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 18, 2026
6	Gran Services S.A	Indirect evidence	Macaé, BrazilHQ checked Sep 18, 2026	1,001-5,000	2,752 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 18, 2026
7	Heerema Marine Contractors	Partial evidence	Leiden, NetherlandsHQ checked Sep 18, 2026	1,001-5,000	2,643 contacts →
	Partial evidence “Heerema Marine Contractors is a world-leading marine contractor in the international offshore energy industry.” Source: RevenueBase Database · checked Sep 18, 2026
8	OCYAN	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 18, 2026	1,001-5,000	2,427 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 18, 2026
9	Pt. Meindo Elang Indah	Partial evidence	Jakarta, IndonesiaHQ checked Sep 18, 2026	1,001-5,000	1,868 contacts →
	Partial evidence “PT Meindo Elang Indah is one of the leading EPCI companies in Indonesia, providing fully integrated solutions in Engineering, Procurement, Construction, and Installation services…” Source: RevenueBase Database · checked Sep 18, 2026
10	Grupo CBO	Indirect evidence	Niterói, BrazilHQ checked Sep 18, 2026	1,001-5,000	1,847 contacts →
	Indirect evidence “O Grupo CBO é uma das maiores empresas de apoio marítimo do Brasil.” Source: RevenueBase Database · checked Sep 18, 2026
11	Groupe Ponticelli Frères	Indirect evidence	FranceHQ checked Sep 18, 2026	5,001-10,000	1,829 contacts →
	Indirect evidence “The Ponticelli Frères Group is one of the main European service suppliers to companies in the energy (oil and gas, nuclear, renewable energy), industrial (chemical, steelworks…” Source: RevenueBase Database · checked Sep 18, 2026
12	Helix Energy Solutions Group	Indirect evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	1,001-5,000	1,706 contacts →
	Indirect evidence “Helix Energy Solutions, headquartered in Houston, Texas, is an international offshore energy services company that provides specialty services to the offshore energy industry…” Source: RevenueBase Database · checked Sep 18, 2026
13	Deepocean	Indirect evidence	Oslo, NorwayHQ checked Sep 18, 2026	1,001-5,000	1,375 contacts →
	Indirect evidence “DeepOcean is a technology-driven, independent solution provider in the ocean space.” Source: RevenueBase Database · checked Sep 18, 2026
14	CCC Underwater Engineering S.A.L	Indirect evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 18, 2026	201-500	1,279 contacts →
	Indirect evidence “(Underwater Engineering) S.A.L was established in 1976.” Source: RevenueBase Database · checked Sep 18, 2026
15	ASN	Indirect evidence	Les Ulis, FranceHQ checked Sep 18, 2026	1,001-5,000	1,140 contacts →
	Indirect evidence “Alcatel Submarine Networks, leads the industry in terms of transmission capacity and installed base with more than km of optical submarine systems deployed worldwide (enough to…” Source: RevenueBase Database · checked Sep 18, 2026
16	BELOV	Indirect evidence	Matriz, BrazilHQ checked Sep 18, 2026	1,001-5,000	1,108 contacts →
	Indirect evidence “A Belov Engenharia foi criada em 1981 em Salvador/BA, pelo engenheiro Aleixo Belov, que à época desfrutava de uma experiência de 15 anos de participação na condução das maiores…” Source: RevenueBase Database · checked Sep 18, 2026
17	Altera Infrastructure	Indirect evidence	Aberdeenshire, United KingdomHQ checked Sep 18, 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 18, 2026
18	Micoperi SRL	Indirect evidence	Ravenna, ItalyHQ checked Sep 18, 2026	201-500	841 contacts →
	Indirect evidence “MICOPERI has been active in the marine sector since 1946 when the company was incorporated as a salvage company to free the shipping routes from vessels sunk during the Second…” Source: RevenueBase Database · checked Sep 18, 2026
19	C-Innovation, LLC	Partial evidence	Mandeville, LA, JamaicaHQ checked Sep 18, 2026	201-500	823 contacts →
	Partial evidence “YOUR SINGLE SOURCE FOR SUBSEA SOLUTIONS FROM EQUIPMENT TO EXPERIENCE, C-INNOVATION IS THE SUBSEA SOLUTION C-Innovation (C-I) is an integrated marine services company specializing…” Source: RevenueBase Database · checked Sep 18, 2026
20	Allianz Middle East Ship Management LLC	Partial evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 18, 2026	1,001-5,000	793 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 18, 2026
21	Modec International INC	Strong evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	201-500	685 contacts →
	Strong evidence “MODEC is a general contractor specializing in engineering, procurement, construction and installation of floating production systems including Floating Production Storage and…” Source: RevenueBase Database · checked Sep 18, 2026
22	Unique Group	Partial evidence	Sharjah, United Arab EmiratesHQ checked Sep 18, 2026	501-1,000	618 contacts →
	Partial evidence “Unique Group is a leading specialist and integrated engineering solutions provider across the global subsea, renewables, oil and gas, and defence industries.” Source: RevenueBase Database · checked Sep 18, 2026
23	Sapura Navegação Marítima S.A	Partial evidence	Rio De Janeiro, BrazilHQ checked Sep 18, 2026	501-1,000	575 contacts →
	Partial evidence “Seagems is a Brazilian company specialized in subsea services, a joint venture between two international key players in their markets, Paratus Energy and Sapura Energy.” Source: RevenueBase Database · checked Sep 18, 2026
24	Dynamic Industries, INC	Indirect evidence	New Orleans, LA, United StatesHQ checked Sep 18, 2026	1,001-5,000	567 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 18, 2026
25	JDR Cable Systems	Indirect evidence	Littleport, United StatesHQ checked Sep 18, 2026	501-1,000	553 contacts →
	Indirect evidence “JDR Cable Systems, part of the TFKable Group, is a global leader in providing power and control solutions for the offshore energy market.” Source: RevenueBase Database · checked Sep 18, 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: subsea installation contractors. 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 subsea installation contractors.
Partial evidence: Its own public description names part of subsea installation contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name subsea installation contractors. 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 1,374 subsea installation contractors worldwide

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Subsea installation contractors worldwide at a glance

As of Sep 18, 2026

24.0%Verified-email coverage

97.3Average contacts per company

11-50Median size (employees)

4.8%Largest-city concentration · Houston

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

431

11-50

488

51-200

269

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 subsea installation contractors, 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.
Coverage: 15 countries, largest first: the United Kingdom, the United States, Norway, the Netherlands, Brazil, Nigeria, the United Arab Emirates, Malaysia, Australia, India and 5 more. Country and city lists for subsea installation contractors are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “subsea installation contractors”. 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 subsea installation contractors), 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 subsea installation contractors, and records with no verified work email.
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, 32,117 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 18, 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.

Subsea installation contractors by location

15 lists · largest first

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

Countries

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 subsea installation contractors, 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 subsea installation contractors are there worldwide?

RevenueBase identified 1,374 subsea installation contractors worldwide 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?

Saipem, headquartered in Milan, tops this list with the largest team on record.

Which country has the most subsea installation contractors?

The United Kingdom leads with 328 companies, followed by the United States (221) and Norway (130). Every subsea installation contractors list by country and city is linked on this page.

Which city has the most subsea installation contractors?

Houston leads with 66 headquartered companies, followed by Aberdeen (65) and Rio De Janeiro (27).

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 32,117 verified decision-maker contacts tracked across these 1,374 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 18, 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.