Company lists · Data refreshed September 2026

Top 25 Clean energy project finance firms based in the United Kingdom

Name: Clean energy project finance 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 436 companies tracked

RevenueBase identified 436 clean energy project finance firms headquartered in the United Kingdom as of September 2026 and tracks 11,342 professional contacts across them, including 4,565 with verified work emails. London is the largest hub.

This list covers clean energy project finance 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

436Companies

11,342Contacts tracked

4,565Verified emails

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The 25 largest clean energy project finance firms based in the United Kingdom

Ranked by team size

Top 25 of 436 clean energy project finance 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 clean energy project finance 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	RES	Partial evidence	Kings Langley, United KingdomHQ checked Sep 16, 2026	1,001-5,000	3,721 contacts →
	Partial evidence “RES is the world’s largest independent renewable energy company, working across 24 countries and active in wind, solar, energy storage, green hydrogen, transmission, and…” Source: RevenueBase Database · checked Sep 16, 2026
2	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
3	Sonnedix	Strong evidence	London, United KingdomHQ checked Sep 16, 2026	501-1,000	563 contacts →
	Strong evidence “Sonnedix is a global renewable energy company delivering 100% clean electricity directly to customers through a diversified portfolio of solar, wind, and storage assets.” Source: RevenueBase Database · checked Sep 16, 2026
4	Cubico Sustainable Investments	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	501-1,000	406 contacts →
	Partial evidence “Cubico Sustainable Investments is one of the world’s largest privately-owned renewable energy companies, leveraging our strong local presence with a unique combination of in-house…” Source: RevenueBase Database · checked Sep 16, 2026
5	Ethical Power	Indirect evidence	Exeter, United KingdomHQ checked Sep 16, 2026	51-200	231 contacts →
	Indirect evidence “Ethical Power Group launched in the UK in 2010.” Source: RevenueBase Database · checked Sep 16, 2026
6	Anesco LTD	Partial evidence	Aldermaston Nr Reading, United KingdomHQ checked Sep 16, 2026	201-500	216 contacts →
	Partial evidence “Anesco is a market leader in renewable energy and energy efficiency.” Source: RevenueBase Database · checked Sep 16, 2026
7	Octopus Energy Generation	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	201-500	153 contacts →
	Partial evidence “At Octopus Energy Generation, we’re building green power for the future, from large-scale solar to onshore and offshore wind, and innovative initiatives like the Fan Club.” Source: RevenueBase Database · checked Sep 16, 2026
8	British Solar Renewables	Strong evidence	Shepton Mallet, United KingdomHQ checked Sep 16, 2026	51-200	148 contacts →
	Strong evidence “Clean energy, powered with purpose.” Source: RevenueBase Database · checked Sep 16, 2026
9	Gridlines	Indirect evidence	Manchester, United KingdomHQ checked Sep 16, 2026	51-200	124 contacts →
	Indirect evidence “Infrastructure deals are getting faster.” Source: RevenueBase Database · checked Sep 16, 2026
10	Econergy Renewable Energy LTD	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	112 contacts →
	Partial evidence “Our Vision Renewable energy will be the source of power for future generations.” Source: RevenueBase Database · checked Sep 16, 2026
11	Belectric UK Member Of Elevion Group	Indirect evidence	Brinkworth, United KingdomHQ checked Sep 16, 2026	51-200	95 contacts →
	Indirect evidence “BELECTRIC UK is part of BELECTRIC, one of Europe's leading EPC service providers in the development, construction, and operation of solar power plants.” Source: RevenueBase Database · checked Sep 16, 2026
12	Private Energy Partners	Partial evidence	Swindon, United KingdomHQ checked Sep 16, 2026	51-200	84 contacts →
	Partial evidence “Private Energy Partners (PEP) is an affiliate of Quinbrook, a specialist investment manager focused exclusively on the infrastructure needed to drive the energy and digital…” Source: RevenueBase Database · checked Sep 16, 2026
13	Nextenergy Capital	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	201-500	83 contacts →
	Indirect evidence “NextEnergy Capital was founded in 2007 to become the leading specialist investment and asset manager in the solar sector.” Source: RevenueBase Database · checked Sep 16, 2026
14	Green CAT Renewables LTD	Indirect evidence	Biggar, United KingdomHQ checked Sep 16, 2026	51-200	80 contacts →
	Indirect evidence “Green Cat Renewables is a dynamic, innovative, and growing company that provides tailored support to the needs of the individual developer throughout the entire development…” Source: RevenueBase Database · checked Sep 16, 2026
15	Innova	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	77 contacts →
	Partial evidence “Innova is a forward-thinking renewable energy business, employing people across two offices in London and Cheltenham.” Source: RevenueBase Database · checked Sep 16, 2026
16	Locogen	Partial evidence	Edinburgh, United KingdomHQ checked Sep 16, 2026	51-200	70 contacts →
	Partial evidence “Locogen exists to accelerate the transition to a world powered by renewable energy.” Source: RevenueBase Database · checked Sep 16, 2026
17	Wattstor	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	70 contacts →
	Indirect evidence “Think Outside The Grid.” Source: RevenueBase Database · checked Sep 16, 2026
18	Nexta Capital Partners	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	65 contacts →
	Partial evidence “Nexta Capital Partners is a holding company which originates, develops, finances builds and operates renewable infrastructure assets.” Source: RevenueBase Database · checked Sep 16, 2026
19	Dulas LTD	Strong evidence	Machynlleth, United KingdomHQ checked Sep 16, 2026	51-200	64 contacts →
	Strong evidence “With over 35 years of experience in the clean energy sector, Dulas is an award-winning renewable energy installer and consultancy, specialising in the wind, solar and hydro…” Source: RevenueBase Database · checked Sep 16, 2026
20	Climate Investment CI	Indirect evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	62 contacts →
	Indirect evidence “Climate Investment is a US and UK-based independently managed specialist investor focused on accelerating capital-efficient decarbonization of heavy emitting sectors.” Source: RevenueBase Database · checked Sep 16, 2026
21	Aura Power	Partial evidence	Bristol, United KingdomHQ checked Sep 16, 2026	11-50	58 contacts →
	Partial evidence “Aura Power is a renewable energy investor, developer and adviser.” Source: RevenueBase Database · checked Sep 16, 2026
22	Renewable Power Capital	Strong evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	51 contacts →
	Strong evidence “We invest in the development, construction, and long-term ownership of solar, onshore wind and battery storage projects, enabling the energy transition and driving stable…” Source: RevenueBase Database · checked Sep 16, 2026
23	Elements Green	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	51 contacts →
	Partial evidence “Elements Green (EG) is a leading renewable energy developer headquartered in London, specialising in utility-scale solar PV systems and battery energy storage solutions.” Source: RevenueBase Database · checked Sep 16, 2026
24	Amberside Advisors	Strong evidence	London, United KingdomHQ checked Sep 16, 2026	11-50	44 contacts →
	Strong evidence “Amberside Advisors is an independent consultancy providing financial and commercial advice to low carbon energy, infrastructure and public sector projects.” Source: RevenueBase Database · checked Sep 16, 2026
25	National Energy	Partial evidence	London, United KingdomHQ checked Sep 16, 2026	51-200	41 contacts →
	Partial evidence “Founded in 2018 by ambitious entrepreneurs, National Energy is a US-backed, privately funded group active globally across the renewable energy sector.” 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: clean energy project finance 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 clean energy project finance firms.
Partial evidence: Its own public description names part of clean energy project finance firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clean energy project finance 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 436 clean energy project finance firms based in the United Kingdom

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Clean energy project finance firms based in the United Kingdom at a glance

As of Sep 16, 2026

40.2%Verified-email coverage

26.0Average contacts per company

1-10Median size (employees)

48.2%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

236

11-50

143

51-200

201-500

501-1,000

1,001-5,000

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 436 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 clean energy project finance 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 “clean energy project finance 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 clean energy project finance 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 clean energy project finance 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, 4,565 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.

Clean energy project finance firms by metro

Clean energy project finance firms in London210

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 clean energy project finance 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 clean energy project finance firms are there based in the United Kingdom?

RevenueBase identified 436 clean energy project finance 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?

RES, headquartered in Kings Langley, tops this list with the largest team on record.

Which city has the most clean energy project finance firms?

London leads with 210 headquartered companies, followed by Edinburgh (12) and Manchester (10).

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 4,565 verified decision-maker contacts tracked across these 436 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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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.