Company lists · Data refreshed September 2026

Top 25 Offshore platform installation contractors worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 2,439 companies tracked

RevenueBase identified 2,439 offshore platform installation contractors worldwide as of September 2026 and tracks 319,275 professional contacts across them, including 60,993 with verified work emails. The United States is the largest market and Singapore the largest hub.

This list covers offshore platform 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 29, 2026. Country and city lists for offshore platform 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 29, 2026 86% judged on-target in blind review

2,439Companies

319,275Contacts tracked

60,993Verified emails

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The 25 largest offshore platform installation contractors worldwide

Ranked by team size

Top 25 of 2,439 offshore platform installation contractors worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to offshore platform 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	Partial evidence	Milan, ItalyHQ checked Sep 29, 2026	10001+	34,095 contacts →
	Partial 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 29, 2026
2	Mcdermott International, LTD	Indirect evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	10001+	20,135 contacts →
	Indirect evidence “McDermott is a premier provider of engineering and construction solutions to the energy industry.” Source: RevenueBase Database · checked Sep 29, 2026
3	Technip Former Company	Indirect evidence	United KingdomHQ checked Sep 29, 2026	10001+	11,255 contacts →
	Indirect evidence “Technip is a former company that was separated into two independent companies: TechnipFMC and Technip Energies, which now operate with no capital ties.” Source: RevenueBase Database · checked Sep 29, 2026
4	Transocean	Partial evidence	Zug, SwitzerlandHQ checked Sep 29, 2026	1,001-5,000	10,068 contacts →
	Partial evidence “Transocean is a leading international provider of offshore contract drilling services for oil and gas wells.” Source: RevenueBase Database · checked Sep 29, 2026
5	SBM Offshore	Partial evidence	Amsterdam, NetherlandsHQ checked Sep 29, 2026	5,001-10,000	8,478 contacts →
	Partial evidence “SBM Offshore is the world’s deepwater ocean-infrastructure expert.” Source: RevenueBase Database · checked Sep 29, 2026
6	Lamprell	Partial evidence	Sharjah, United Arab EmiratesHQ checked Sep 29, 2026	5,001-10,000	6,080 contacts →
	Partial 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 29, 2026
7	Noble Corporation	Strong evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	5,001-10,000	5,601 contacts →
	Strong evidence “Noble is a leading offshore drilling contractor for the oil and gas industry.” Source: RevenueBase Database · checked Sep 29, 2026
8	MODEC	Partial evidence	Chuo-ku, JapanHQ checked Sep 29, 2026	5,001-10,000	5,077 contacts →
	Partial evidence “MODEC has been a leading provider of solutions for the floating offshore oil and gas market for over 50 years.” Source: RevenueBase Database · checked Sep 29, 2026
9	Seatrium	Partial evidence	United StatesHQ checked Sep 29, 2026	10001+	4,522 contacts →
	Partial evidence “A Premier Global Player with Deep Engineering Expertise in the offshore, marine and energy industries Engineering our Future Together.” Source: RevenueBase Database · checked Sep 29, 2026
10	Deme Group	Strong evidence	Beveren-kruibeke-zwijndrecht, BelgiumHQ checked Sep 29, 2026	5,001-10,000	4,395 contacts →
	Strong evidence “DEME (Euronext Brussels: DEME) is a leading contractor in the fields of offshore energy, dredging and marine infrastructure, and environmental remediation.” Source: RevenueBase Database · checked Sep 29, 2026
11	VAN Oord	Strong evidence	3063 Nh, NetherlandsHQ checked Sep 29, 2026	5,001-10,000	4,364 contacts →
	Strong evidence “Van Oord is a leading international marine contractor focusing on dredging, infrastructure and offshore energy projects.” Source: RevenueBase Database · checked Sep 29, 2026
12	ADES	Indirect evidence	Al Khobar, Saudi ArabiaHQ checked Sep 29, 2026	5,001-10,000	3,251 contacts →
	Indirect evidence “ADES is a world-leading international provider of oil and gas drilling services.” Source: RevenueBase Database · checked Sep 29, 2026
13	Valaris Limited	Indirect evidence	Houston, TX, United StatesHQ checked Sep 29, 2026	5,001-10,000	3,173 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 29, 2026
14	DOF	Partial evidence	Bergen, NorwayHQ checked Sep 29, 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 29, 2026
15	Gran Services S.A	Indirect evidence	Macaé, BrazilHQ checked Sep 29, 2026	1,001-5,000	2,752 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
16	Heerema Marine Contractors	Strong evidence	Leiden, NetherlandsHQ checked Sep 29, 2026	1,001-5,000	2,643 contacts →
	Strong evidence “Heerema Marine Contractors is a world-leading marine contractor in the international offshore energy industry.” Source: RevenueBase Database · checked Sep 29, 2026
17	Allseas	Strong evidence	Châtel-saint-denis, SwitzerlandHQ checked Sep 29, 2026	1,001-5,000	2,554 contacts →
	Strong evidence “Allseas is a world-leading contractor in the offshore energy market.” Source: RevenueBase Database · checked Sep 29, 2026
18	Estrutural	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 29, 2026	1,001-5,000	2,461 contacts →
	Indirect evidence “Quem somos: Somos uma empresa nacional, com mais de 30 anos no segmento da construção, montagem e manutenção industrial.” Source: RevenueBase Database · checked Sep 29, 2026
19	OCYAN	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 29, 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 29, 2026
20	Brasfels	Indirect evidence	Angra Dos Reis, BrazilHQ checked Sep 29, 2026	5,001-10,000	2,370 contacts →
	Indirect evidence “Empresa multinacional na área de construção e reparos de navios e plataformas.” Source: RevenueBase Database · checked Sep 29, 2026
21	Arabian Drilling	Partial evidence	Al-khobar, Saudi ArabiaHQ checked Sep 29, 2026	5,001-10,000	2,042 contacts →
	Partial evidence “We are the region’s trusted onshore and offshore oil & gas drilling company with an extensive track record of operational excellence and advanced capabilities that have enabled…” Source: RevenueBase Database · checked Sep 29, 2026
22	Chantiers DE L'atlantique	Indirect evidence	Saint-nazaire, FranceHQ checked Sep 29, 2026	1,001-5,000	2,004 contacts →
	Indirect evidence “Installée sur la façade Atlantique, Chantiers de l’Atlantique est une entreprise de construction maritime (paquebots, sous-stations…) et de services aux flottes.” Source: RevenueBase Database · checked Sep 29, 2026
23	ELFE	Indirect evidence	Macaé, BrazilHQ checked Sep 29, 2026	1,001-5,000	1,898 contacts →
	Indirect evidence “No mercado há mais de duas décadas, a Axia é uma empresa nacional com atuação em operação e manutenção industrial.” Source: RevenueBase Database · checked Sep 29, 2026
24	Pt. Meindo Elang Indah	Partial evidence	Jakarta, IndonesiaHQ checked Sep 29, 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 29, 2026
25	Odfjell Drilling	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 29, 2026	1,001-5,000	1,864 contacts →
	Indirect evidence “Odfjell Drilling is an international drilling company with around 1,500 employees with operations around the world.” Source: RevenueBase Database · checked Sep 29, 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 platform 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 offshore platform installation contractors.
Partial evidence: Its own public description names part of offshore platform installation contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore platform 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 2,439 offshore platform installation contractors worldwide

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Offshore platform installation contractors worldwide at a glance

As of Sep 29, 2026

19.1%Verified-email coverage

130.9Average contacts per company

11-50Median size (employees)

4.7%Largest-city concentration · Singapore

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

485

11-50

756

51-200

571

201-500

287

501-1,000

133

1,001-5,000

146

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 platform 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: Every country. Country and city lists for offshore platform installation contractors are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “offshore platform 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 offshore platform 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 offshore platform 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, 60,993 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 29, 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 platform installation contractors by location

23 lists · largest first

Every Offshore platform installation contractors 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 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 platform 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 offshore platform installation contractors are there worldwide?

RevenueBase identified 2,439 offshore platform 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 offshore platform installation contractors?

The United States leads with 238 companies, followed by the United Kingdom (182) and Nigeria (168). Every offshore platform installation contractors list by country and city is linked on this page.

Which city has the most offshore platform installation contractors?

Singapore leads with 114 headquartered companies, followed by Houston (82) and Port Harcourt (50).

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 60,993 verified decision-maker contacts tracked across these 2,439 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 29, 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.