Company lists · Data refreshed September 2026

Top 25 Renewable energy offshore developers worldwide

Name: Renewable energy offshore developers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 1,507 companies tracked

RevenueBase identified 1,507 renewable energy offshore developers worldwide as of September 2026 and tracks 128,716 professional contacts across them, including 36,666 with verified work emails and 0 with mobile numbers. The United Kingdom is the largest market and London the largest hub.

This list covers renewable energy offshore developers 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 renewable energy offshore developers 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

1,507Companies

128,716Contacts tracked

36,666Verified emails

0Mobile numbers

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The 25 largest renewable energy offshore developers worldwide

Ranked by team size

Top 25 of 1,507 renewable energy offshore developers worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to renewable energy offshore developers: 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	Subsea7	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	10001+	12,645 contacts →
	Strong evidence “Subsea7 makes offshore energy transition possible through the continuous evolution of lower-carbon oil and gas and by enabling the growth of renewables and emerging energy.” Source: RevenueBase Database · checked Sep 17, 2026
3	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
4	Ørsted	Strong evidence	Fredericia, United StatesHQ checked Sep 17, 2026	5,001-10,000	7,538 contacts →
	Strong 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
5	Gran Services S.A	Indirect evidence	Macaé, BrazilHQ checked Sep 17, 2026	1,001-5,000	2,752 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
6	FTI	Strong evidence	Menasha, WI, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,741 contacts →
	Strong evidence “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Source: RevenueBase Database · checked Sep 17, 2026
7	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
8	Greenko Group	Strong evidence	Hyderabad, IndiaHQ checked Sep 17, 2026	1,001-5,000	2,578 contacts →
	Strong evidence “Greenko, is one of the World’s leading Energy Transition and Decarbonization solutions company, with an installed Renewable Energy capacity of ~7.5 GW across Wind, Solar and Hydro…” Source: RevenueBase Database · checked Sep 17, 2026
9	Semco Maritime	Strong evidence	Esbjerg, DenmarkHQ checked Sep 17, 2026	1,001-5,000	1,947 contacts →
	Strong evidence “To fulfil the vision of a fossil-free future, we need conventional and renewable energy sources to coexist effectively until the day when renewables can fully keep the world…” Source: RevenueBase Database · checked Sep 17, 2026
10	SSE Renewables	Strong evidence	Perth, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,900 contacts →
	Strong 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
11	Helix Energy Solutions Group	Strong evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,706 contacts →
	Strong 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 17, 2026
12	Deepocean	Indirect evidence	Oslo, NorwayHQ checked Sep 17, 2026	1,001-5,000	1,375 contacts →
	Indirect evidence “DeepOcean is a technology-driven, independent solution provider in the ocean space.” Source: RevenueBase Database · checked Sep 17, 2026
13	Dragados Offshore	Partial evidence	11510 Puerto Real, SpainHQ checked Sep 17, 2026	1,001-5,000	1,348 contacts →
	Partial evidence “Founded in 1972, Dragados Offshore S.A.” Source: RevenueBase Database · checked Sep 17, 2026
14	Seaway7	Strong evidence	Oslo, NorwayHQ checked Sep 17, 2026	501-1,000	1,205 contacts →
	Strong evidence “Seaway7 Seaway7 is a global leader in the delivery of offshore wind projects, committed to contributing to an efficient and sustainable energy supply for the future.” Source: RevenueBase Database · checked Sep 17, 2026
15	Lightsource BP	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	1,114 contacts →
	Strong evidence “Lightsource bp is working to support a future powered by renewable, affordable and reliable energy that benefits our partners, people and planet.” Source: RevenueBase Database · checked Sep 17, 2026
16	CTG Brasil	Partial evidence	Sao Paulo, BrazilHQ checked Sep 17, 2026	501-1,000	988 contacts →
	Partial evidence “Na CTG Brasil, trabalhamos por um único propósito: desenvolver o mundo com energia limpa em larga escala.” Source: RevenueBase Database · checked Sep 17, 2026
17	Altera Infrastructure	Strong evidence	Aberdeenshire, United KingdomHQ checked Sep 17, 2026	501-1,000	955 contacts →
	Strong 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
18	ABO Energy	Strong evidence	Wiesbaden, GermanyHQ checked Sep 17, 2026	1,001-5,000	785 contacts →
	Strong evidence “Founded in 1996, ABO Energy (fomerly known as ABO Wind) is among Europe’s leading developers of renewable energy projects.” Source: RevenueBase Database · checked Sep 17, 2026
19	Juwi Group	Strong evidence	Wörrstadt, GermanyHQ checked Sep 17, 2026	1,001-5,000	785 contacts →
	Strong evidence “For 30 years, we have been one of the leading specialists in renewable energies, offering complete project development and other services related to the planning, construction…” Source: RevenueBase Database · checked Sep 17, 2026
20	Cadeler	Partial evidence	Copenhagen V, DenmarkHQ checked Sep 17, 2026	1,001-5,000	750 contacts →
	Partial 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
21	European Energy	Strong evidence	Søborg, DenmarkHQ checked Sep 17, 2026	501-1,000	704 contacts →
	Strong evidence “European Energy develops, finances, constructs and operates onshore and offshore wind and solar farms, Power-to-X facilities and Battery Energy Storage Systems.” Source: RevenueBase Database · checked Sep 17, 2026
22	Ampcontrol	Partial evidence	Tomago, AustraliaHQ checked Sep 17, 2026	501-1,000	650 contacts →
	Partial evidence “Ampcontrol is challenging the future by solving the most complex problems in energy.” Source: RevenueBase Database · checked Sep 17, 2026
23	OW Ocean Winds	Strong evidence	Madrid, SpainHQ checked Sep 17, 2026	501-1,000	595 contacts →
	Strong 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
24	Juniper Green Energy	Partial evidence	Gurugram, IndiaHQ checked Sep 17, 2026	501-1,000	583 contacts →
	Partial evidence “Juniper Green Energy Ltd.” Source: RevenueBase Database · checked Sep 17, 2026
25	JDR Cable Systems	Strong evidence	Littleport, United StatesHQ checked Sep 17, 2026	501-1,000	553 contacts →
	Strong evidence “JDR Cable Systems, part of the TFKable Group, is a global leader in providing power and control solutions for the offshore energy market.” 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: renewable energy offshore developers. 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 renewable energy offshore developers.
Partial evidence: Its own public description names part of renewable energy offshore developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name renewable energy offshore developers. 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 1,507 renewable energy offshore developers worldwide

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Renewable energy offshore developers worldwide at a glance

As of Sep 17, 2026

28.5%Verified-email coverage

85.4Average contacts per company

11-50Median size (employees)

4.6%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

675

11-50

493

51-200

192

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 renewable energy offshore developers, 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: 17 countries, largest first: the United Kingdom, the United States, the Netherlands, Germany, France, Norway, Spain, Italy, Denmark, India and 7 more. Country and city lists for renewable energy offshore developers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “renewable energy offshore developers”. 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 renewable energy offshore developers), 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 renewable energy offshore developers, 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, 36,666 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.

Renewable energy offshore developers by location

20 lists · largest first

Every Renewable energy offshore developers 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 renewable energy offshore developers, 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 renewable energy offshore developers are there worldwide?

RevenueBase identified 1,507 renewable energy offshore developers 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 renewable energy offshore developers?

The United Kingdom leads with 438 companies, followed by the United States (168) and the Netherlands (110). Every renewable energy offshore developers list by country and city is linked on this page.

Which city has the most renewable energy offshore developers?

London leads with 70 headquartered companies, followed by Hamburg (30) and Edinburgh (29).

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 36,666 verified decision-maker contacts tracked across these 1,507 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.