Company lists · Data refreshed September 2026

Top 25 Coastal energy development firms based in the United Kingdom

Name: Coastal energy development firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 344 companies tracked

RevenueBase identified 344 coastal energy development firms headquartered in the United Kingdom as of September 2026 and tracks 27,956 professional contacts across them, including 10,378 with verified work emails. London is the largest hub.

This list covers coastal energy development firms headquartered in the United Kingdom, 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 16, 2026.

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 16, 2026 86% judged on-target in blind review

344Companies

27,956Contacts tracked

10,378Verified emails

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The 25 largest coastal energy development firms based in the United Kingdom

Ranked by team size

Top 25 of 344 coastal energy development firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to coastal energy development firms: 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	Subsea7	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	10001+	12,645 contacts →
	Partial 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 16, 2026
2	SSE Renewables	Partial evidence	Perth, United KingdomHQ checked Sep 16, 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 16, 2026
3	Lightsource BP	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	1,001-5,000	1,114 contacts →
	Partial 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 16, 2026
4	Altera Infrastructure	Partial evidence	Aberdeenshire, United KingdomHQ checked Sep 16, 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 16, 2026
5	Boskalis Subsea Services	Partial evidence	Aberdeen, United KingdomHQ checked Sep 16, 2026	201-500	516 contacts →
	Partial evidence “Boskalis Subsea Services is a world-leading provider of specialist subsea solutions for the offshore energy industry, seamlessly integrating services to deliver optimum results.” Source: RevenueBase Database · checked Sep 16, 2026
6	Natural Power	Partial evidence	Castle Douglas, United KingdomHQ checked Sep 16, 2026	501-1,000	500 contacts →
	Partial evidence “Natural Power is a leading independent consultancy and service provider for the renewable energy sector.” Source: RevenueBase Database · checked Sep 16, 2026
7	Boston Energy	Partial evidence	Hessle, United KingdomHQ checked Sep 16, 2026	51-200	391 contacts →
	Partial evidence “Boston Energy is a specialist delivery partner to the offshore wind industry, supporting OEMs, Developers, Tier 1 contractors and vessel owners across the full wind farm lifecycle.” Source: RevenueBase Database · checked Sep 16, 2026
8	2h Offshore	Partial evidence	Woking, United KingdomHQ checked Sep 16, 2026	201-500	286 contacts →
	Partial evidence “2H Offshore delivers leading-edge advanced systems engineering for all types of offshore structures in the oil and gas and renewable energy sectors.” Source: RevenueBase Database · checked Sep 16, 2026
9	Aurora Energy Services	Partial evidence	Inverness, United KingdomHQ checked Sep 16, 2026	201-500	253 contacts →
	Partial evidence “Aurora Energy Services is an international, multi-disciplinary company delivering integrated solutions across the full energy asset lifecycles.” Source: RevenueBase Database · checked Sep 16, 2026
10	Acteon	Partial evidence	Norwich, United KingdomHQ checked Sep 16, 2026	1,001-5,000	192 contacts →
	Partial evidence “Acteon delivers data-driven, engineering-led solutions across the lifecycle of offshore energy infrastructure.” Source: RevenueBase Database · checked Sep 16, 2026
11	OWC	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	185 contacts →
	Partial evidence “The Renewable Energy Consultants.” Source: RevenueBase Database · checked Sep 16, 2026
12	Wood Thilsted	Partial evidence	London, United KingdomHQ checked Sep 16, 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 16, 2026
13	OSBIT	Partial evidence	Northumberland, United KingdomHQ checked Sep 16, 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 16, 2026
14	Aquaterra Energy	Strong evidence	Norwich, United KingdomHQ checked Sep 16, 2026	51-200	167 contacts →
	Strong evidence “Aquaterra Energy provides intelligently engineered products and services for well access and offshore developments - supporting efficient operations across the full life cycle of…” Source: RevenueBase Database · checked Sep 16, 2026
15	Eastgate Engineering	Indirect evidence	Thornaby-on-tees, United KingdomHQ checked Sep 16, 2026	201-500	163 contacts →
	Indirect evidence “Eastgate Engineering is an Electrical and Instrumentation contractor that delivers complex, high-risk infrastructure projects with cost certainty, without compromising safety or…” Source: RevenueBase Database · checked Sep 16, 2026
16	Seatrium Offshore Renewable Services LTD	Partial evidence	Lowestoft, United KingdomHQ checked Sep 16, 2026	n/a	155 contacts →
	Partial evidence “Seatrium Offshore Renewable Services Ltd (Seatrium ORS) has over 55 years of unparalleled expertise and experience in the offshore energy industry.” Source: RevenueBase Database · checked Sep 16, 2026
17	Flotation Energy	Partial evidence	Edinburgh, United KingdomHQ checked Sep 16, 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 16, 2026
18	EPI Group	Partial evidence	Fleet, United KingdomHQ checked Sep 16, 2026	11-50	144 contacts →
	Partial evidence “EPI Group is a leading provider of specialist geoscience, QHSE, environmental and technical services for the energy industry worldwide.” Source: RevenueBase Database · checked Sep 16, 2026
19	Longitude Engineering	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	138 contacts →
	Indirect evidence “The Engineering Consultants.” Source: RevenueBase Database · checked Sep 16, 2026
20	Interocean Marine Services	Indirect evidence	Portlethen, United KingdomHQ checked Sep 16, 2026	51-200	134 contacts →
	Indirect evidence “Interocean provide a comprehensive range of services to the offshore oil and gas, marine, and renewable sectors.” Source: RevenueBase Database · checked Sep 16, 2026
21	Windhoist	Indirect evidence	Glasgow, United KingdomHQ checked Sep 16, 2026	201-500	130 contacts →
	Indirect evidence “Windhoist is a leading wind turbine installation contractor offering heavy cranage, mechanical and electrical services to principal wind turbine suppliers in the global market.” Source: RevenueBase Database · checked Sep 16, 2026
22	Apollo	Partial evidence	Aberdeen, United KingdomHQ checked Sep 16, 2026	51-200	129 contacts →
	Partial evidence “Apollo is a leading engineering and advisory consultancy working across sustainable infrastructure, marine energies, oil and gas, technical placements and digital solutions.” Source: RevenueBase Database · checked Sep 16, 2026
23	Seajacks	Indirect evidence	Great Yarmouth, United KingdomHQ checked Sep 16, 2026	201-500	122 contacts →
	Indirect evidence “Please follow @Cadeler for more updates.” Source: RevenueBase Database · checked Sep 16, 2026
24	RTS Wind UK	Partial evidence	Middlesbrough, United KingdomHQ checked Sep 16, 2026	51-200	119 contacts →
	Partial evidence “RTS Wind Limited specialise in the provision of services to the onshore and offshore renewable energy sector.” Source: RevenueBase Database · checked Sep 16, 2026
25	EDF Renewables UK & Ireland	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	501-1,000	117 contacts →
	Partial evidence “EDF Renewables is part of one of the world’s leading renewable energy companies in the UK.” Source: RevenueBase Database · checked Sep 16, 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: coastal energy development firms. 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 coastal energy development firms.
Partial evidence: Its own public description names part of coastal energy development firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name coastal energy development firms. 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 344 coastal energy development firms based in the United Kingdom

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Coastal energy development firms based in the United Kingdom at a glance

As of Sep 16, 2026

37.1%Verified-email coverage

81.3Average contacts per company

11-50Median size (employees)

14.0%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

156

11-50

106

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 344 companies.

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 coastal energy development firms, 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.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “coastal energy development firms”. 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 coastal energy development firms), 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 coastal energy development firms, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
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, 10,378 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 16, 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.

Coastal energy development firms by metro

Coastal energy development firms in London48
Coastal energy development firms in Aberdeen31

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 coastal energy development firms, 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 coastal energy development firms are there based in the United Kingdom?

RevenueBase identified 344 coastal energy development firms headquartered in the United Kingdom 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?

Subsea7, headquartered in London, tops this list with the largest team on record.

Which city has the most coastal energy development firms?

London leads with 48 headquartered companies, followed by Aberdeen (31) and Edinburgh (24).

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 10,378 verified decision-maker contacts tracked across these 344 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 16, 2026.

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Coastal energy development firms by geography

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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.