Company lists · Data refreshed October 2026

Top 25 Deepwater installation contractors worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Oct 11, 2026 2,686 companies tracked

RevenueBase identified 2,686 company matches for deepwater installation contractors worldwide as of October 2026 and tracks 316,941 professional contacts across them, including 62,114 with verified work emails. The United States is the largest market and Houston the largest hub.

This list covers company matches for deepwater installation contractors 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 October 11, 2026. Country and city lists for deepwater installation contractors 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 Oct 11, 2026 How this list was built

2,686Companies

316,941Contacts tracked

62,114Verified emails

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The 25 largest deepwater installation contractors worldwide

Ranked by team size

Top 25 of 2,686 company matches for deepwater installation contractors worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 11, 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	Saipem	Exact match	Milan, ItalyHQ recorded Oct 11, 2026	10001+	35,555 contacts →
	Exact match “Saipem is a global leader in the engineering and construction of major projects for the energy and infrastructure sectors, both offshore and onshore.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
2	Technip Former Company	Exact match	United KingdomHQ recorded Oct 11, 2026	10001+	11,864 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 · Oct 11, 2026 · View company records in RevenueBase
3	Transocean	Exact match	Zug, SwitzerlandHQ recorded Oct 11, 2026	1,001-5,000	10,599 contacts →
	Exact match “Transocean is a leading international provider of offshore contract drilling services for oil and gas wells.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
4	SBM Offshore	Exact match	Amsterdam, NetherlandsHQ recorded Oct 11, 2026	5,001-10,000	9,144 contacts →
	Exact match “SBM Offshore is the world’s deepwater ocean-infrastructure expert.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
5	EXPRO	Exact match	Houston, TX, United StatesHQ recorded Oct 11, 2026	5,001-10,000	6,721 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 · Oct 11, 2026 · View company records in RevenueBase
6	Lamprell	Exact match	Sharjah, United Arab EmiratesHQ recorded Oct 11, 2026	5,001-10,000	6,375 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7	Noble Corporation	Exact match	Houston, TX, United StatesHQ recorded Oct 11, 2026	5,001-10,000	5,939 contacts →
	Exact match “Noble is a leading offshore drilling contractor for the oil and gas industry.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
8	MODEC	Exact match	Chuo-ku, JapanHQ recorded Oct 11, 2026	5,001-10,000	5,354 contacts →
	Exact match “MODEC has been a leading provider of solutions for the floating offshore oil and gas market for over 50 years.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
9	Seadrill	Exact match	Houston, United StatesHQ recorded Oct 11, 2026	1,001-5,000	5,065 contacts →
	Exact match “Seadrill is setting the standard in deepwater oil and gas drilling.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
10	Seatrium	Exact match	United StatesHQ recorded Oct 11, 2026	10001+	4,979 contacts →
	Exact match “A Premier Global Player with Deep Engineering Expertise in the offshore, marine and energy industries Engineering our Future Together.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
11	Deme Group	Exact match	Beveren-kruibeke-zwijndrecht, BelgiumHQ recorded Oct 11, 2026	5,001-10,000	4,648 contacts →
	Exact match “DEME (Euronext Brussels: DEME) is a leading contractor in the fields of offshore energy, dredging and marine infrastructure, and environmental remediation.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12	VAN Oord	Exact match	3063 Nh, NetherlandsHQ recorded Oct 11, 2026	5,001-10,000	4,483 contacts →
	Exact match “Van Oord is a leading international marine contractor focusing on dredging, infrastructure and offshore energy projects.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13	DOF	Exact match	Bergen, NorwayHQ recorded Oct 11, 2026	5,001-10,000	3,269 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 · Oct 11, 2026 · View company records in RevenueBase
14	Valaris Limited	Exact match	Houston, TX, United StatesHQ recorded Oct 11, 2026	5,001-10,000	3,263 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
15	Gran Services S.A	Exact match	Macaé, BrazilHQ recorded Oct 11, 2026	1,001-5,000	3,012 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
16	Estrutural	Exact match	Porto Alegre, BrazilHQ recorded Oct 11, 2026	1,001-5,000	2,795 contacts →
	Exact match “Quem somos: Somos uma empresa nacional, com mais de 30 anos no segmento da construção, montagem e manutenção industrial.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17	Heerema Marine Contractors	Exact match	Leiden, NetherlandsHQ recorded Oct 11, 2026	1,001-5,000	2,792 contacts →
	Exact match “Heerema Marine Contractors is a world-leading marine contractor in the international offshore energy industry.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
18	Allseas	Exact match	Châtel-saint-denis, United StatesHQ recorded Oct 11, 2026	1,001-5,000	2,765 contacts →
	Exact match “Allseas is a world-leading contractor in the offshore energy market.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
19	OCYAN	Exact match	Rio De Janeiro, BrazilHQ recorded Oct 11, 2026	1,001-5,000	2,328 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 · Oct 11, 2026 · View company records in RevenueBase
20	Free Lancer	Exact match	BrazilHQ recorded Oct 11, 2026	n/a	2,271 contacts →
	Exact match “Rov company.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21	Constellation OIL Services	Exact match	Rio De Janeiro, BrazilHQ recorded Oct 11, 2026	1,001-5,000	2,176 contacts →
	Exact match “Constellation Oil Services is a drilling contractor highly differentiated due to its unique experience in deep and ultra-deepwater drilling.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22	Chantiers DE L'atlantique	Exact match	Saint-nazaire, FranceHQ recorded Oct 11, 2026	1,001-5,000	2,121 contacts →
	Exact match “Installée sur la façade Atlantique, Chantiers de l’Atlantique est une entreprise de construction maritime (paquebots, sous-stations…) et de services aux flottes.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23	Arabian Drilling	Exact match	Al-khobar, Saudi ArabiaHQ recorded Oct 11, 2026	5,001-10,000	2,072 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24	ZMI Holdings	Exact match	Abu Dhabi, United Arab EmiratesHQ recorded Oct 11, 2026	1,001-5,000	2,036 contacts →
	Exact match “ZMI Holdings an ADNOC L&S company THE NEW WAVE Transforming the Offshore Energy Industry An integrated service provider offering unparalleled commitment.” Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25	ELFE	Exact match	Macaé, BrazilHQ recorded Oct 11, 2026	1,001-5,000	2,006 contacts →
	Exact match “No mercado há mais de duas décadas, a Axia é uma empresa nacional com atuação em operação e manutenção industrial.” Recorded in the RevenueBase company graph · Oct 11, 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 “deepwater installation contractors”. 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 2,686 deepwater installation contractors worldwide

See the full list, filter by size, metro and specialty, and access 62,114 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Deepwater installation contractors worldwide at a glance

As of Oct 11, 2026

19.6%Verified-email coverage

118.0Average contacts per company

11-50Median size (employees)

3.6%Largest-city concentration · Houston

Oct 11, 2026Page data refreshed

Companies by employee count

1-10

646

11-50

949

51-200

544

201-500

256

501-1,000

108

1,001-5,000

128

5,001-10,000

10001+

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 deepwater installation contractors are linked below.
What qualifies: Company records worldwide whose business descriptions match “deepwater installation contractors” 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 62,114 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 October 11, 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.

Deepwater installation contractors by location

23 lists · largest first

Every Deepwater 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 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 “deepwater installation contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many deepwater installation contractors are there worldwide?

RevenueBase identified 2,686 company matches for deepwater installation contractors worldwide as of October 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?

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

Which country has the most deepwater installation contractors?

The United States leads with 411 companies, followed by the United Kingdom (252) and Nigeria (153). Every deepwater installation contractors list by country and city is linked on this page.

Which city has the most deepwater installation contractors?

Houston leads with 97 company records, followed by Singapore (91) and Aberdeen (42).

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 62,114 professional contacts with verified work emails tracked across these 2,686 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 October 11, 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.