Company lists · Data refreshed September 2026
Top 25 Semi-submersible platform companies worldwide
RevenueBase identified 1,147 semi-submersible platform companies worldwide as of September 2026 and tracks 223,075 professional contacts across them, including 44,400 with verified work emails. The United States is the largest market and Singapore the largest hub.
This list covers semi-submersible platform 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 29, 2026. Country and city lists for semi-submersible platform 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.
The 25 largest semi-submersible platform companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 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, 2026Thanks. The Data Team will review it. | |||||
| 3 | 10,068 contacts → | ||||
Indirect evidence “Transocean is a leading international provider of offshore contract drilling services for oil and gas wells.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 8,478 contacts → | ||||
Indirect evidence “SBM Offshore is the world’s deepwater ocean-infrastructure expert.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 5,601 contacts → | ||||
Indirect evidence “Noble is a leading offshore drilling contractor for the oil and gas industry.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 5,077 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 8 | 4,845 contacts → | ||||
Indirect evidence “Seadrill is setting the standard in deepwater oil and gas drilling.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 4,395 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 10 | 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, 2026Thanks. The Data Team will review it. | |||||
| 11 | 2,942 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 12 | 2,643 contacts → | ||||
Indirect evidence “Heerema Marine Contractors is a world-leading marine contractor in the international offshore energy industry.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 2,554 contacts → | ||||
Indirect evidence “Allseas is a world-leading contractor in the offshore energy market.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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, 2026Thanks. The Data Team will review it. | |||||
| 15 | 2,312 contacts → | ||||
Indirect evidence “Zamil Offshore Services Company has been offering diversified offshore and marine support services to the oil and gas industry since 1977.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 2,224 contacts → | ||||
Indirect evidence “Rov company.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 2,042 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 18 | 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, 2026Thanks. The Data Team will review it. | |||||
| 19 | 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, 2026Thanks. The Data Team will review it. | |||||
| 20 | 1,860 contacts → | ||||
Indirect evidence “BW Offshore engineers innovative floating production solutions.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 1,847 contacts → | ||||
Indirect evidence “O Grupo CBO é uma das maiores empresas de apoio marítimo do Brasil.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 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 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1,699 contacts → | ||||
Indirect 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 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1,664 contacts → | ||||
Indirect evidence “With an extensive fleet of over 200 vessels worldwide, Rawabi Vallianz Offshore Services leverages Rawabi’s expertise to ensure exceptional quality and on-time delivery.” Source: RevenueBase Database · checked Sep 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 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 29, 2026Thanks. The Data Team will review it. | |||||
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: semi-submersible platform 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 semi-submersible platform companies.
- Partial evidence
- Its own public description names part of semi-submersible platform companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name semi-submersible platform 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 1,147 semi-submersible platform companies worldwide
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Semi-submersible platform companies worldwide at a glance
As of Sep 29, 2026Companies by employee count
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 semi-submersible platform 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
- Every country. Country and city lists for semi-submersible platform companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “semi-submersible platform 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 semi-submersible platform 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 semi-submersible platform 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, 44,400 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.
Semi-submersible platform companies by location
9 lists · largest firstEvery Semi-submersible platform companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Semi-submersible platform companies based in the United States128
- Semi-submersible platform companies based in the United Kingdom125
- Semi-submersible platform companies based in Norway73
- Semi-submersible platform companies based in the Netherlands57
- Semi-submersible platform companies based in the United Arab Emirates51
- Semi-submersible platform companies based in Brazil50
- Semi-submersible platform companies based in Malaysia41
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 semi-submersible platform 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 semi-submersible platform companies are there worldwide?
RevenueBase identified 1,147 semi-submersible platform 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 semi-submersible platform companies?
The United States leads with 128 companies, followed by the United Kingdom (125) and Norway (73). Every semi-submersible platform companies list by country and city is linked on this page.
Which city has the most semi-submersible platform companies?
Singapore leads with 74 headquartered companies, followed by Houston (62) and Aberdeen (32).
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 44,400 verified decision-maker contacts tracked across these 1,147 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.