Company lists · Data refreshed October 2026

Top 24 Energy efficiency investment funds based in the United Kingdom

RevenueBase identified 58 company matches for energy efficiency investment funds associated with the United Kingdom as of October 2026 and tracks 581 professional contacts across them, including 275 with verified work emails. London is the largest hub.

This list covers company matches for energy efficiency investment funds 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 October 12, 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 Oct 12, 2026 How this list was built
58Companies
581Contacts tracked
275Verified emails
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The 24 largest energy efficiency investment funds based in the United Kingdom

Ranked by team size
Top 24 of 58 company matches for energy efficiency investment funds based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Oct 12, 2026201-500197 contacts →

Exact match

“Who we help "We help public sector organisations access funding and expertise to reduce carbon emissions, improve energy efficiency and create better places to live and work." How…”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2Exact matchWatford, United KingdomHQ recorded Oct 12, 202651-20039 contacts →

Exact match

“At Carbon Rewind, we are optimistic about the energy future of the UK, and committed to doing our part to deliver the vision of a more sustainable future.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
3Exact matchLiverpool, United KingdomHQ recorded Oct 12, 202611-5033 contacts →

Exact match

“On-Site Energy was founded to support energy intensive manufacturers to improve their energy efficiency and achieve their sustainability goals through innovation and an…”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4Exact matchBournemouth, United KingdomHQ recorded Oct 12, 202611-5027 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 · Oct 12, 2026 · View company records in RevenueBase
5Exact matchSouthport, United KingdomHQ recorded Oct 12, 202651-20018 contacts →

Exact match

“With over 20 years of experience in the energy services sector, Making Energy Greener are committed to transforming our community's homes with innovative energy-saving products…”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6Exact matchBrighton, United KingdomHQ recorded Oct 12, 20261-1018 contacts →

Exact match

“Brighton and Hove Energy Services Co-operative (BHESCo) is a not-for-profit social enterprise on a mission to accelerate the clean energy transition by delivering affordable…”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Oct 12, 20261-1015 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 · Oct 12, 2026 · View company records in RevenueBase
8Exact matchBarking And Dagenham, United KingdomHQ recorded Oct 12, 202611-5014 contacts →

Exact match

“Welcome to Eco Target – we are energy specialists based in London and our aim is to help our customers save money on energy bills and reduce carbon footprint.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Oct 12, 20261-1012 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 · Oct 12, 2026 · View company records in RevenueBase
10Exact matchBirmingham, United KingdomHQ recorded Oct 12, 202611-5011 contacts →

Exact match

“Simply Eco Ltd was established to assist people to gain access to Carbon Saving and Efficiency Measures under the government Energy Company Obligation (ECO) and Green Deal Schemes.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Oct 12, 20261-1010 contacts →

Exact match

“Telis Energy is a UK-based green energy projects developer and investor.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Oct 12, 202611-509 contacts →

Exact match

“Tallarna is a climate tech and finance platform for sustainable impact.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13Exact matchSalisbury, United KingdomHQ recorded Oct 12, 20261-109 contacts →

Exact match

“ABOUT US We’re committed to helping businesses across the UK transition to low carbon energy infrastructure – and we know how to make these green technologies work not just for…”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14Exact matchLeicester, United KingdomHQ recorded Oct 12, 202611-508 contacts →

Exact match

“Ellipse Energy was established in 2011, by a team of experienced professionals from some of the well-known names in the energy efficiency sector.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Oct 12, 20261-106 contacts →

Exact match

“Econest is an AI-enabled asset manager that sources and purchases energy inefficient properties to retrofit and manage at scale for large investment portfolios.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16Exact matchCity Of London, United KingdomHQ recorded Oct 12, 202611-505 contacts →

Exact match

“Capitas Finance specialises in financing energy solutions for carbon-conscious businesses and public sector organisations.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Oct 12, 20261-104 contacts →

Exact match

“A financing platform that delivers holistic, onsite energy solutions to the energy challenges of energy-intensive industry and critical national infrastructure owners.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18Exact matchBristol, United KingdomHQ recorded Oct 12, 20261-103 contacts →

Exact match

“Boxed Solutions is a group of energy services companies dedicated to improving energy efficiency in the social housing sector.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19Exact matchManchester, United KingdomHQ recorded Oct 12, 20261-103 contacts →

Exact match

“We work with businesses to identify opportunities to save energy to reduce costs and improve the bottom line.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20Exact matchBrentwood, United KingdomHQ recorded Oct 12, 20261-102 contacts →

Exact match

“ECOedge are leading experts in energy efficiency, dedicated to transforming homes in the UK through a comprehensive range of energy-saving solutions.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21Exact matchTrowbridge, United KingdomHQ recorded Oct 12, 20261-102 contacts →

Exact match

“Facility services upgrades need careful consideration.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22Exact matchLlanelli, United KingdomHQ recorded Oct 12, 20261-102 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
23Exact matchPreston, United KingdomHQ recorded Oct 12, 20261-101 contacts →

Exact match

“Easee Energy & Environmental are focused on helping homes and businesses to improve their energy efficiency and adopt renewable energy solutions.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Oct 12, 20261-101 contacts →

Exact match

“We invest in, develop and advise energy generation and efficiency projects.”

Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase

Showing 24 of 58 energy efficiency investment funds based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 275 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Energy efficiency investment funds based in the United Kingdom at a glance

As of Oct 12, 2026
47.3%Verified-email coverage
10.0Average contacts per company
1-10Median size (employees)
31.0%Largest-city concentration · London
Oct 12, 2026Page data refreshed

Companies by employee count

1-10
30
11-50
22
51-200
4
201-500
1
1,001-5,000
1

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 58 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 “energy efficiency investment funds” 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 275 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 October 12, 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.

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 “energy efficiency investment funds”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy efficiency investment funds are there based in the United Kingdom?

RevenueBase identified 58 company matches for energy efficiency investment funds associated with the United Kingdom as of October 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?

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

Which city has the most energy efficiency investment funds?

London leads with 18 company records, followed by Manchester (2) and Barking And Dagenham (1).

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 275 professional contacts with verified work emails tracked across these 58 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 October 12, 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.