Company lists · Data refreshed August 2026

Top 25 Clean energy venture capital companies based in the United Kingdom

Name: Clean energy venture capital companies based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Aug 31, 2026 180 companies tracked

RevenueBase identified 180 clean energy venture capital companies headquartered in the United Kingdom as of August 2026 and tracks 3,214 professional contacts across them, including 1,472 with verified work emails and 322 with mobile numbers. London is the largest hub.

This list covers clean energy venture capital companies 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 August 31, 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 RevenueBase Smart Search rating on every row Refreshed Aug 31, 2026 86% judged on-target in blind review

180Companies

3,214Contacts tracked

1,472Verified emails

322Mobile numbers

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The 25 largest clean energy venture capital companies based in the United Kingdom

Ranked by team size

Top 25 of 180 clean energy venture capital companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to clean energy venture capital 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	Lightsource BP	Partial evidence	London, United Kingdom	1,001-5,000	1,146 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 Aug 31, 2026
2	Fuse Energy	Partial evidence	London, United Kingdom	501-1,000	276 contacts →
	Partial evidence “We are building a full stack energy company to lower cost of energy & accelerate energy abundance.” Source: RevenueBase Database · checked Aug 31, 2026
3	Anesco LTD	Partial evidence	Reading, United Kingdom	201-500	215 contacts →
	Partial evidence “Anesco is a market leader in renewable energy and energy efficiency.” Source: RevenueBase Database · checked Aug 31, 2026
4	LOW Carbon	Partial evidence	London, United Kingdom	51-200	204 contacts →
	Partial evidence “Low Carbon creates renewable energy to fight climate change.” Source: RevenueBase Database · checked Aug 31, 2026
5	Octopus Energy Generation	Partial evidence	London, United Kingdom	201-500	152 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 Aug 31, 2026
6	Innova	Partial evidence	London, United Kingdom	51-200	76 contacts →
	Partial evidence “Innova is a forward-thinking renewable energy business, employing people across two offices in London and Cheltenham.” Source: RevenueBase Database · checked Aug 31, 2026
7	Aura Power	Partial evidence	Bristol, United Kingdom	11-50	58 contacts →
	Partial evidence “Aura Power is a renewable energy investor, developer and adviser.” Source: RevenueBase Database · checked Aug 31, 2026
8	Renewable Power Capital	Partial evidence	London, United Kingdom	51-200	49 contacts →
	Partial 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 Aug 31, 2026
9	Greenfield	Indirect evidence	London, United Kingdom	11-50	42 contacts →
	Indirect evidence “Greenfield specialise in the investment, development and delivery of sustainable and renewable-led infrastructure projects.” Source: RevenueBase Database · checked Aug 31, 2026
10	National Energy	Partial evidence	London, United Kingdom	51-200	40 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 Aug 31, 2026
11	AP Ventures	Strong evidence	London, United Kingdom	11-50	30 contacts →
	Strong evidence “AP Ventures is an independent venture capital firm headquartered in London, with offices in San Francisco and South Africa.” Source: RevenueBase Database · checked Aug 31, 2026
12	Zestec Renewable Energy	Partial evidence	Bournemouth, United Kingdom	11-50	28 contacts →
	Partial evidence “Owned by funds advised by Octopus Energy Generation, one of Europe’s largest renewable energy investors currently managing renewable assets totalling more than £5bn, we are…” Source: RevenueBase Database · checked Aug 31, 2026
13	Larkfleet Group Part Of Phoenix Sustainable Investments	Partial evidence	Bourne, United Kingdom	11-50	26 contacts →
	Partial evidence “Larkfleet Group is now a part of Phoenix Sustainable Investments - an award-winning developer of sustainable energy projects.” Source: RevenueBase Database · checked Aug 31, 2026
14	ETF Partners	Strong evidence	London, United Kingdom	11-50	25 contacts →
	Strong evidence “Founded in 2005, ETF Partners (The Environmental Technologies Fund) stands as Europe's original venture capital firm dedicated to sustainability and impact investing.” Source: RevenueBase Database · checked Aug 31, 2026
15	Green Energy International Limited	Partial evidence	Cheadle Hulme, United Kingdom	11-50	25 contacts →
	Partial evidence “Green Energy International Limited (GEIL) operates in the renewable energy market specialising in solar energy development.” Source: RevenueBase Database · checked Aug 31, 2026
16	Innovo	Partial evidence	London, United Kingdom	11-50	24 contacts →
	Partial evidence “INNOVO finances, builds, and operates large clean-tech projects world-wide driving our mission of halving carbon emissions by 2030” Source: RevenueBase Database · checked Aug 31, 2026
17	Pash Global	Strong evidence	London, United Kingdom	11-50	22 contacts →
	Strong evidence “PASH GLOBAL (“PASH”) is an impact investor in the clean energy sector.” Source: RevenueBase Database · checked Aug 31, 2026
18	Privilege Finance	Indirect evidence	Stretham, United Kingdom	11-50	21 contacts →
	Indirect evidence “Privilege Finance is a specialist funder with over 20 years’ experience in financing projects which reduce carbon and mitigate against climate change.” Source: RevenueBase Database · checked Aug 31, 2026
19	Glennmont Partners From Nuveen	Strong evidence	London, United Kingdom	51-200	20 contacts →
	Strong evidence “Glennmont Partners is one of Europe’s largest fund managers focusing exclusively on investment in clean energy infrastructure.” Source: RevenueBase Database · checked Aug 31, 2026
20	Boom Power	Partial evidence	Arundel, United Kingdom	11-50	18 contacts →
	Partial evidence “BOOM Power is committed to developing renewable energy projects that contribute to a sustainable and low-carbon future.” Source: RevenueBase Database · checked Aug 31, 2026
21	Ampyr Distributed Energy	Strong evidence	London, United Kingdom	11-50	17 contacts →
	Strong evidence “At AMPYR Distributed Energy we design, build, own, and operate clean energy technologies that help our customers go green and reduce their energy costs.” Source: RevenueBase Database · checked Aug 31, 2026
22	Clean Energy Transition LLP	Strong evidence	London, United Kingdom	11-50	14 contacts →
	Strong evidence “Clean Energy Transition LLP is an investment management partnership focused on fundamental equity investing.” Source: RevenueBase Database · checked Aug 31, 2026
23	Victory Hill Capital Partners LLP	Partial evidence	London, United Kingdom	11-50	14 contacts →
	Partial evidence “Victory Hill is based in London and was founded in May 2020 by an experienced team of energy financiers, that have spun-out of a large established global project finance banking…” Source: RevenueBase Database · checked Aug 31, 2026
24	Helios Energy Investments	Strong evidence	London, United Kingdom	11-50	14 contacts →
	Strong evidence “Founded in 2010 Helios Energy Investments manages five funds and several co-investment vehicles, with over 750M Euro of invested capital.” Source: RevenueBase Database · checked Aug 31, 2026
25	HYCAP	Partial evidence	Oxford, United Kingdom	11-50	13 contacts →
	Partial evidence “HYCAP is a global investment firm leading the energy transition through strategic investments across Private Equity, Technology, and Infrastructure.” Source: RevenueBase Database · checked Aug 31, 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 venture capital 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 clean energy venture capital companies.
Partial evidence: Its own public description names part of clean energy venture capital companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clean energy venture capital 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 180 clean energy venture capital companies based in the United Kingdom

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Clean energy venture capital companies based in the United Kingdom at a glance

As of Aug 31, 2026

45.8%Verified-email coverage

10.0%Mobile-number coverage

17.9Average contacts per company

1-10Median size (employees)

65.6%Largest-city concentration · London

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

105

11-50

51-200

201-500

501-1,000

1,001-5,000

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 venture capital 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.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “clean energy venture capital 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 clean energy venture capital 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 clean energy venture capital companies, 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, 1,472 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 August 31, 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 venture capital companies by metro

Clean energy venture capital companies in London118

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 venture capital 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 clean energy venture capital companies are there based in the United Kingdom?

RevenueBase identified 180 clean energy venture capital companies headquartered in the United Kingdom as of August 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?

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

Which city has the most clean energy venture capital companies?

London leads with 118 headquartered companies, followed by Oxford (3) and Manchester (3).

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 1,472 verified decision-maker contacts tracked across these 180 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 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.