Company lists · Data refreshed September 2026

Top 25 Marine energy companies worldwide

Name: Marine energy companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 651 companies tracked

RevenueBase identified 651 marine energy companies worldwide as of September 2026 and tracks 39,324 professional contacts across them, including 9,766 with verified work emails and 0 with mobile numbers. The United Kingdom is the largest market and London the largest hub.

This list covers marine energy 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 marine energy 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

651Companies

39,324Contacts tracked

9,766Verified emails

0Mobile numbers

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The 25 largest marine energy companies worldwide

Ranked by team size

Top 25 of 651 marine energy companies worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to marine energy 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	SBM Offshore	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 17, 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 17, 2026
2	Ørsted	Partial evidence	Fredericia, United StatesHQ checked Sep 17, 2026	5,001-10,000	7,538 contacts →
	Partial evidence “Ørsted is the global leader in offshore wind power and is one of the largest renewable energy companies in the world.” Source: RevenueBase Database · checked Sep 17, 2026
3	Heerema Marine Contractors	Strong evidence	Leiden, NetherlandsHQ checked Sep 17, 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 17, 2026
4	SSE Renewables	Partial evidence	Perth, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,900 contacts →
	Partial evidence “SSE Renewables is a leading developer and operator of renewable energy generation, headquartered in the UK and Ireland, with a growing presence internationally.” Source: RevenueBase Database · checked Sep 17, 2026
5	BW Group	Strong evidence	Houston, TX, SingaporeHQ checked Sep 17, 2026	10001+	1,218 contacts →
	Strong evidence “BW Group is a leading global energy and maritime company involved in shipping, deepwater oil & gas production, renewable energy and digital infrastructure.” Source: RevenueBase Database · checked Sep 17, 2026
6	Shearwater Geoservices	Partial evidence	Laksevåg, NorwayHQ checked Sep 17, 2026	1,001-5,000	1,031 contacts →
	Partial evidence “Shearwater is a global marine geoscience and technology business.” Source: RevenueBase Database · checked Sep 17, 2026
7	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
8	Cadeler	Indirect evidence	Copenhagen V, DenmarkHQ checked Sep 17, 2026	1,001-5,000	750 contacts →
	Indirect evidence “Cadeler is a pure-play offshore wind installation partner and the global leader in turbine transport and installation, operating the world’s largest fleet of heavy-lift jack-up…” Source: RevenueBase Database · checked Sep 17, 2026
9	OW Ocean Winds	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	501-1,000	595 contacts →
	Partial evidence “Ocean Winds (OW) is an international company dedicated to offshore wind, leading a new era of clean energy by turning ocean winds into power that lights up homes, businesses, and…” Source: RevenueBase Database · checked Sep 17, 2026
10	Global Maritime	Partial evidence	Stavanger, NorwayHQ checked Sep 17, 2026	201-500	472 contacts →
	Partial evidence “Global Maritime delivers integrated marine solutions for a changing offshore world.” Source: RevenueBase Database · checked Sep 17, 2026
11	Copenhagen Offshore Partners	Indirect evidence	Copenhagen, DenmarkHQ checked Sep 17, 2026	201-500	462 contacts →
	Indirect evidence “We are unlocking the full potential of offshore wind to power the world.” Source: RevenueBase Database · checked Sep 17, 2026
12	Zeronorth	Partial evidence	Copenhagen, DenmarkHQ checked Sep 17, 2026	501-1,000	454 contacts →
	Partial evidence “ZeroNorth is a technology leader committed to accelerating the energy transition in global shipping.” Source: RevenueBase Database · checked Sep 17, 2026
13	REM Offshore	Indirect evidence	Fosnavåg, NorwayHQ checked Sep 17, 2026	201-500	288 contacts →
	Indirect evidence “About Rem Offshore Rem Offshore is a new company with old roots – tracing back to 1978 with fishery activities in Norway, Rem Offshore organisation today operates worldwide, with…” Source: RevenueBase Database · checked Sep 17, 2026
14	Corvus Energy	Strong evidence	Bergen, BC, NorwayHQ checked Sep 17, 2026	201-500	235 contacts →
	Strong evidence “Corvus Energy is the world’s leading supplier of safe, innovative and reliable zero-emission solutions for maritime, offshore, port, and subsea applications-in the form of marine…” Source: RevenueBase Database · checked Sep 17, 2026
15	Seatrium Amfels, INC	Strong evidence	Brownsville, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	229 contacts →
	Strong evidence “Seatrium AmFELS is an industry pioneer committed to sustainability by providing cleaner offshore & marine solutions, offshore renewables, and new energy, generating long-term…” Source: RevenueBase Database · checked Sep 17, 2026
16	Wärtsilä North America, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	501-1,000	228 contacts →
	Indirect evidence “Wärtsilä established its US operations in 1979 through its subsidiary Wärtsilä North America, Inc.(WNA).” Source: RevenueBase Database · checked Sep 17, 2026
17	Olympic Subsea ASA	Indirect evidence	Fosnavåg Brygge 2.etg, NorwayHQ checked Sep 17, 2026	501-1,000	201 contacts →
	Indirect evidence “For thousands of years, people on Norway’s weather torn west coast have ridden the waves and conquered the sea.” Source: RevenueBase Database · checked Sep 17, 2026
18	LES Éoliennes EN MER Services	Indirect evidence	Courbevoie, FranceHQ checked Sep 17, 2026	n/a	191 contacts →
	Indirect evidence “Les Éoliennes en Mer Services, a consortium of ENGIE, EDP Renewables, Sumitomo Corporation and Caisse des Dépôts, are developing two offshore wind farm projects off the islands of…” Source: RevenueBase Database · checked Sep 17, 2026
19	OWC	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	185 contacts →
	Partial evidence “The Renewable Energy Consultants.” Source: RevenueBase Database · checked Sep 17, 2026
20	Aventa	Strong evidence	Paris, FranceHQ checked Sep 17, 2026	201-500	176 contacts →
	Strong evidence “Aventa empowers the Marine Energy market with the sharpest skills to help design a bluer future.” Source: RevenueBase Database · checked Sep 17, 2026
21	Wood Thilsted	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	175 contacts →
	Partial evidence “Wood Thilsted is a world-leading renewable energy engineering consultancy experienced and specialised in offshore wind.” Source: RevenueBase Database · checked Sep 17, 2026
22	OSBIT	Partial evidence	Northumberland, United KingdomHQ checked Sep 17, 2026	201-500	171 contacts →
	Partial evidence “Osbit’s vision is to unlock a clean energy future by creating smarter technology.” Source: RevenueBase Database · checked Sep 17, 2026
23	Flotation Energy	Partial evidence	Edinburgh, United KingdomHQ checked Sep 17, 2026	51-200	154 contacts →
	Partial evidence “Flotation Energy Ltd delivers clean, green, renewable energy by using our expertise in floating and fixed offshore wind and the energy transition, supporting achievement of…” Source: RevenueBase Database · checked Sep 17, 2026
24	EDF PEI	Indirect evidence	Paris, FranceHQ checked Sep 17, 2026	201-500	154 contacts →
	Indirect evidence “EDF PEI - Production Electrique Insulaire -est un acteur majeur de la production d’électricité dans les zones non-interconnectées.” Source: RevenueBase Database · checked Sep 17, 2026
25	Manta Marine Technologies	Partial evidence	Oslo, NorwayHQ checked Sep 17, 2026	51-200	146 contacts →
	Partial evidence “Manta Marine Technologies has been at the forefront of maritime emissions reduction since 2010.” 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: marine energy 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 marine energy companies.
Partial evidence: Its own public description names part of marine energy companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine energy 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 651 marine energy companies worldwide

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Marine energy companies worldwide at a glance

As of Sep 17, 2026

24.8%Verified-email coverage

60.4Average contacts per company

1-10Median size (employees)

6.6%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

338

11-50

191

51-200

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 marine energy 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: 8 countries, largest first: the United Kingdom, the United States, Norway, France, the Netherlands, Canada, Spain, Denmark. Country and city lists for marine energy companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “marine energy 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 marine energy 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 marine energy 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, 9,766 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.

Marine energy companies by location

8 lists · largest first

Every Marine energy 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 marine energy 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 marine energy companies are there worldwide?

RevenueBase identified 651 marine energy 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?

SBM Offshore, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most marine energy companies?

The United Kingdom leads with 219 companies, followed by the United States (134) and Norway (77). Every marine energy companies list by country and city is linked on this page.

Which city has the most marine energy companies?

London leads with 43 headquartered companies, followed by Edinburgh (19) and Oslo (14).

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 9,766 verified decision-maker contacts tracked across these 651 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.