Company lists · Data refreshed November 2026

Top 24 Clean tech investors based in the United Kingdom

Name: Clean tech investors based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 135 companies tracked

RevenueBase identified 135 company matches for clean tech investors associated with the United Kingdom as of November 2026 and tracks 1,193 professional contacts across them, including 596 with verified work emails. London is the largest hub.

This list covers company matches for clean tech investors associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

135Companies

1,193Contacts tracked

596Verified emails

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The 24 largest clean tech investors based in the United Kingdom

Ranked by team size

Top 24 of 135 company matches for clean tech investors based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Octopus Energy Generation	Exact match	London, United KingdomHQ recorded Nov 6, 2026	201-500	173 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Climate Investment CI	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	64 contacts →
	Exact match “Climate Investment is a US and UK-based independently managed specialist investor focused on accelerating capital-efficient decarbonization of heavy emitting sectors.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Aura Power	Exact match	Bristol, United KingdomHQ recorded Nov 6, 2026	11-50	60 contacts →
	Exact match “Aura Power is a renewable energy developer and Independent Power Producer (IPP), developing and delivering high-quality solar and battery storage projects that contribute to a…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Temporis Capital	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	60 contacts →
	Exact match “Temporis was founded in 2011 by three seasoned investment industry professionals.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	National Energy	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	39 contacts →
	Exact match “Founded in 2018 by ambitious entrepreneurs, National Energy is a US-backed, privately funded group active globally across the renewable energy sector.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Zouk Capital LLP	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	36 contacts →
	Exact match “Zouk Capital is a fund manager focused on the opportunities emerging at the intersection of infrastructure, technology and sustainability.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	ETF Partners	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	33 contacts →
	Exact match “Founded in 2005, ETF Partners (The Environmental Technologies Fund) stands as Europe's original venture capital firm dedicated to sustainability and impact investing.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Zestec Renewable Energy	Exact match	Bournemouth, United KingdomHQ recorded Nov 6, 2026	11-50	32 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Larkfleet Group Part Of Phoenix Sustainable Investments	Exact match	Bourne, United KingdomHQ recorded Nov 6, 2026	11-50	27 contacts →
	Exact match “Larkfleet Group is now a part of Phoenix Sustainable Investments - an award-winning developer of sustainable energy projects.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Pash Global	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	24 contacts →
	Exact match “PASH GLOBAL (“PASH”) is an impact investor in the clean energy sector.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Green Energy International Limited	Exact match	Cheadle Hulme, United KingdomHQ recorded Nov 6, 2026	11-50	23 contacts →
	Exact match “Green Energy International Limited (GEIL) operates in the renewable energy market specialising in solar energy development.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Privilege Finance	Exact match	Stretham, United KingdomHQ recorded Nov 6, 2026	11-50	19 contacts →
	Exact match “Privilege Finance is a specialist funder with over 20 years’ experience in financing projects which reduce carbon and mitigate against climate change.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Carbon Limiting Technologies	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	18 contacts →
	Exact match “At CLT, we believe clean technology is essential to building a resilient, competitive, and sustainable economy.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Clean Energy Transition LLP	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	17 contacts →
	Exact match “Clean Energy Transition LLP is an investment management partnership focused on fundamental equity investing.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Glennmont Partners From Nuveen	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	17 contacts →
	Exact match “Glennmont Partners is one of Europe’s largest fund managers focusing exclusively on investment in clean energy infrastructure.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Victory Hill Capital Partners LLP	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	16 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Claritas Investments	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	16 contacts →
	Exact match “CLARITAS is an emergent player in the new energy space focused on growth markets in the EMEA region.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Clean Growth Fund	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1-10	14 contacts →
	Exact match “CGF invest in tech innovations that reduce greenhouse gas emissions or improve resource efficiency across power, transport, industry, buildings, waste and water.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Buckthorn Partners LLP	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1-10	12 contacts →
	Exact match “Buckthorn invests in industrial businesses providing products and services that support the growth and integration of renewable energy, lower emissions, energy efficiency and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Blume Equity	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1-10	11 contacts →
	Exact match “Blume Equity is a climate-tech growth equity firm with offices in London and Amsterdam focusing on companies driving sustainable outcomes for planet and people.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Susten	Exact match	London, United KingdomHQ recorded Nov 6, 2026	11-50	11 contacts →
	Exact match “We invest in technologies that solve critical bottlenecks in power.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	HYCAP	Exact match	Oxford, United KingdomHQ recorded Nov 6, 2026	11-50	10 contacts →
	Exact match “HYCAP is a global investment firm leading the energy transition through strategic investments across Private Equity, Technology, and Infrastructure.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Enechange Insight Renewables	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1-10	10 contacts →
	Exact match “ENECHANGE Insight promotes innovation and global expansion of clean energy technologies across the globe.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Telis Energy	Exact match	London, United KingdomHQ recorded Nov 6, 2026	1-10	10 contacts →
	Exact match “Telis Energy is a UK-based green energy projects developer and investor.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “clean tech investors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 24 of 135 clean tech investors based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 596 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Clean tech investors based in the United Kingdom at a glance

As of Nov 6, 2026

50.0%Verified-email coverage

8.8Average contacts per company

1-10Median size (employees)

74.1%Largest-city concentration · London

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 135 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with the United Kingdom whose business descriptions match “clean tech investors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 596 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Clean tech investors by metro

Clean tech investors in London100

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “clean tech investors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many clean tech investors are there based in the United Kingdom?

RevenueBase identified 135 company matches for clean tech investors associated with the United Kingdom as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Octopus Energy Generation tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most clean tech investors?

London leads with 100 company records, followed by Bristol (2) and City Of London (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 596 professional contacts with verified work emails tracked across these 135 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.