Company lists · Data refreshed September 2026

Top 25 Offshore rig construction companies worldwide

Name: Offshore rig construction companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 696 companies tracked

RevenueBase identified 696 offshore rig construction companies worldwide as of September 2026 and tracks 161,772 professional contacts across them, including 31,447 with verified work emails and 0 with mobile numbers. The United States is the largest market and Houston the largest hub.

This list covers offshore rig construction companies 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 17, 2026. Country and city lists for offshore rig construction companies 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 17, 2026 86% judged on-target in blind review

696Companies

161,772Contacts tracked

31,447Verified emails

0Mobile numbers

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The 25 largest offshore rig construction companies worldwide

Ranked by team size

Top 25 of 696 offshore rig construction companies worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to offshore rig construction companies: 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	Strong evidence	Milan, ItalyHQ checked Sep 17, 2026	10001+	34,095 contacts →
	Strong 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 17, 2026
2	SBM Offshore	Partial evidence	Amsterdam, NetherlandsHQ checked Sep 17, 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 17, 2026
3	Lamprell	Partial evidence	Sharjah, United Arab EmiratesHQ checked Sep 17, 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 17, 2026
4	Nabors Industries	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	10001+	5,865 contacts →
	Indirect evidence “Nabors Industries is a leading provider of advanced technology for the energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
5	Noble Corporation	Partial evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	5,001-10,000	5,601 contacts →
	Partial evidence “Noble is a leading offshore drilling contractor for the oil and gas industry.” Source: RevenueBase Database · checked Sep 17, 2026
6	Seadrill	Indirect evidence	Houston, United StatesHQ checked Sep 17, 2026	1,001-5,000	4,845 contacts →
	Indirect evidence “Seadrill is setting the standard in deepwater oil and gas drilling.” Source: RevenueBase Database · checked Sep 17, 2026
7	Valaris Limited	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 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 17, 2026
8	DOF	Partial evidence	Bergen, NorwayHQ checked Sep 17, 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 17, 2026
9	Shelf Drilling	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 17, 2026	1,001-5,000	2,689 contacts →
	Indirect evidence “Shelf Drilling is a wholly owned subsidiary of ADES Holding Company, a leading international oil and gas drilling services provider.” Source: RevenueBase Database · checked Sep 17, 2026
10	Heerema Marine Contractors	Partial evidence	Leiden, NetherlandsHQ checked Sep 17, 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 17, 2026
11	Precision Drilling	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 17, 2026	5,001-10,000	2,471 contacts →
	Indirect evidence “Precision is a leading provider of safe and High Performance, High-Value services to the oil and gas industry.” Source: RevenueBase Database · checked Sep 17, 2026
12	Estrutural	Indirect evidence	Porto Alegre, BrazilHQ checked Sep 17, 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 17, 2026
13	Brasfels	Indirect evidence	Angra Dos Reis, BrazilHQ checked Sep 17, 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 17, 2026
14	Odfjell Drilling	Indirect evidence	Aberdeen, United KingdomHQ checked Sep 17, 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 17, 2026
15	Borr Drilling	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,699 contacts →
	Partial evidence “Borr Drilling Limited is an offshore shallow-water drilling contractor providing worldwide offshore drilling services to the oil and gas industry.” Source: RevenueBase Database · checked Sep 17, 2026
16	Bumi Armada	Indirect evidence	Kuala Lumpur, MalaysiaHQ checked Sep 17, 2026	1,001-5,000	1,628 contacts →
	Indirect evidence “At Bumi Armada, we amplify competency to resonate with the changing Oil & Gas industry demands, values and expectations.” Source: RevenueBase Database · checked Sep 17, 2026
17	CCC Underwater Engineering S.A.L	Indirect evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 17, 2026	201-500	1,279 contacts →
	Indirect evidence “(Underwater Engineering) S.A.L was established in 1976.” Source: RevenueBase Database · checked Sep 17, 2026
18	HMH	Indirect evidence	Amsterdam, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,097 contacts →
	Indirect evidence “HMH is a premier drilling solutions provider - delivering a broad portfolio of products and services that are designed to be the safest and most efficient in the industry.” Source: RevenueBase Database · checked Sep 17, 2026
19	Estaleiro Mauá S A	Indirect evidence	Niterói, BrazilHQ checked Sep 17, 2026	1,001-5,000	1,019 contacts →
	Indirect evidence “O MAIS EXPERIENTE ESTALEIRO DO BRASIL O Mauá é o mais experiente e tradicional estaleiro em operação no Brasil com atividades desde 1845.” Source: RevenueBase Database · checked Sep 17, 2026
20	Altera Infrastructure	Partial evidence	Aberdeenshire, United KingdomHQ checked Sep 17, 2026	501-1,000	955 contacts →
	Partial 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 17, 2026
21	Bollinger Shipyards	Partial evidence	Lockport, United StatesHQ checked Sep 17, 2026	5,001-10,000	853 contacts →
	Partial evidence “Bollinger Shipyards is the leading provider of quality new construction, repair and conversion products and services to both the military and commercial marine industry.” Source: RevenueBase Database · checked Sep 17, 2026
22	Techocean Engineering Solutions	Indirect evidence	Macaé, BrazilHQ checked Sep 17, 2026	501-1,000	751 contacts →
	Indirect evidence “Techocean is a supplier of engineering services focused on the oil & gas industry, creating solutions for steel fabrications as Platforms, Piping Lines, Several Structures and…” Source: RevenueBase Database · checked Sep 17, 2026
23	Npcc Engineering Pvt. Limited	Indirect evidence	Mumbai, IndiaHQ checked Sep 17, 2026	501-1,000	707 contacts →
	Indirect evidence “NPCC Engineering Pvt.” Source: RevenueBase Database · checked Sep 17, 2026
24	Dolphin Drilling	Partial evidence	Aberdeen, United KingdomHQ checked Sep 17, 2026	201-500	694 contacts →
	Partial evidence “Dolphin Drilling is the offshore drilling pioneer of the past and for the future.” Source: RevenueBase Database · checked Sep 17, 2026
25	Greatship	Partial evidence	Mumbai, IndiaHQ checked Sep 17, 2026	1,001-5,000	681 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 17, 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 rig construction companies. 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 rig construction companies.
Partial evidence: Its own public description names part of offshore rig construction companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name offshore rig construction companies. 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 696 offshore rig construction companies worldwide

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Offshore rig construction companies worldwide at a glance

As of Sep 17, 2026

19.4%Verified-email coverage

232.4Average contacts per company

51-200Median size (employees)

10.5%Largest-city concentration · Houston

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

156

11-50

186

51-200

162

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 offshore rig construction companies, 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: 10 countries, largest first: the United States, the United Kingdom, the United Arab Emirates, Norway, the Netherlands, Brazil, India, Malaysia, Canada, Italy. Country and city lists for offshore rig construction companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “offshore rig construction companies”. 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 rig construction companies), 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 rig construction companies, 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, 31,447 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 17, 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 rig construction companies by location

10 lists · largest first

Every Offshore rig construction companies 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 offshore rig construction companies, 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 rig construction companies are there worldwide?

RevenueBase identified 696 offshore rig construction companies 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 rig construction companies?

The United States leads with 226 companies, followed by the United Kingdom (80) and the United Arab Emirates (71). Every offshore rig construction companies list by country and city is linked on this page.

Which city has the most offshore rig construction companies?

Houston leads with 73 headquartered companies, followed by Aberdeen (20) and Mumbai (20).

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 31,447 verified decision-maker contacts tracked across these 696 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 17, 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.