Company lists · Data refreshed September 2026

Top 25 Climate change organizations based in the United Kingdom

Name: Climate change organizations based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 552 companies tracked

RevenueBase identified 552 company matches for climate change organizations associated with the United Kingdom as of September 2026 and tracks 7,089 professional contacts across them, including 2,132 with verified work emails. London is the largest hub.

This list covers company matches for climate change organizations 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 September 19, 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 Sep 19, 2026 How this list was built

552Companies

7,089Contacts tracked

2,132Verified emails

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The 25 largest climate change organizations based in the United Kingdom

Ranked by team size

Top 25 of 552 company matches for climate change organizations based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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	C40 Cities	Exact match	London, United KingdomHQ recorded Sep 19, 2026	201-500	517 contacts →
	Exact match “C40 is a network of nearly 100 mayors of the world’s leading cities who are working to deliver the urgent action needed right now to confront the climate crisis and create a…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2	Friends Of The Earth	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	517 contacts →
	Exact match “The UK's largest grassroots environmental organisation.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3	Energy Saving Trust	Exact match	London, United KingdomHQ recorded Sep 19, 2026	201-500	426 contacts →
	Exact match “Energy Saving Trust is an independent organisation dedicated to promoting energy efficiency, low carbon transport and sustainable energy use.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4	Ambipar Europe	Exact match	London, United KingdomHQ recorded Sep 19, 2026	10001+	335 contacts →
	Exact match “At Ambipar, we are all caretakers of the planet!” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5	Climate Group	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	233 contacts →
	Exact match “Climate Group is an international nonprofit, launched in 2004, with offices in London, Amsterdam, Beijing, New Delhi, and New York.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6	E3g	Exact match	Waterloo, United KingdomHQ recorded Sep 19, 2026	51-200	173 contacts →
	Exact match “E3G is an independent think tank working to deliver a safe climate for all.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7	Greenpeace UK	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	167 contacts →
	Exact match “Greenpeace is an independent global campaigning network that acts to change attitudes and behaviour, to protect and conserve the environment and to promote peace.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8	Global Witness	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	117 contacts →
	Exact match “Global Witness is an investigative, campaigning organisation.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9	Isometric	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	106 contacts →
	Exact match “Isometric is the agentic certification platform for the industrial economy.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10	Ecologi B Corp	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	99 contacts →
	Exact match “Measure, reduce and report your carbon emissions and fund high-integrity climate restoration.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11	SOS UK	Exact match	Macclesfield, United KingdomHQ recorded Sep 19, 2026	11-50	79 contacts →
	Exact match “An educational charity created in response to the climate emergency and ecological crisis.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12	Institutional Investors Group On Climate Change Iigcc	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	78 contacts →
	Exact match “IIGCC is an investor-led membership organisation with c.400 members across 20+ countries.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13	Ashden	Exact match	London, United KingdomHQ recorded Sep 19, 2026	11-50	76 contacts →
	Exact match “Ashden's mission is to accelerate transformative climate solutions and build a more just world.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14	Climatescience	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	73 contacts →
	Exact match “The science of climate change and its solutions - fun & accessible.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15	Greenhouse Communications	Exact match	Bristol, United KingdomHQ recorded Sep 19, 2026	51-200	70 contacts →
	Exact match “Greenhouse is a specialist communications agency powering positive change.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16	Influencemap	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	70 contacts →
	Exact match “InfluenceMap is a leading global think tank working with investors, corporations, policy makers, the media, and campaigners with data-driven analysis on the climate and nature…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17	Digital Technology Institute For Development Dtid	Exact match	London, United KingdomHQ recorded Sep 19, 2026	51-200	66 contacts →
	Exact match “Digital Technology Institute for Development (DTID)(formerly Blockchain & Climate Institute (BCI)) is a not-for-profit entity combining the functions of a think-and-do tank, an…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18	ARC	Exact match	London, United KingdomHQ recorded Sep 19, 2026	11-50	56 contacts →
	Exact match “Arc is a global non‑profit organisation that builds the shared pathways needed to turn climate and resilience ambitions into tangible investment flows.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
19	Dialogue Earth	Exact match	London, United KingdomHQ recorded Sep 19, 2026	11-50	56 contacts →
	Exact match “Dialogue Earth is an independent non-profit dedicated to fact-based, trusted climate journalism.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
20	Hubbub	Exact match	London, United KingdomHQ recorded Sep 19, 2026	11-50	54 contacts →
	Exact match “People care about the environment.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
21	Forster Communications	Exact match	London, United KingdomHQ recorded Sep 19, 2026	11-50	52 contacts →
	Exact match “Forster Communications is a specialist communications agency, 100% focused on tackling climate change, driving social justice and improving lives.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
22	Climate Policy Radar	Exact match	London, United KingdomHQ recorded Sep 19, 2026	11-50	38 contacts →
	Exact match “Climate Policy Radar builds the shared data infrastructure that turns fragmented government documents into reliable, actionable evidence.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
23	Julie's Bicycle	Exact match	London, United KingdomHQ recorded Sep 19, 2026	11-50	38 contacts →
	Exact match “Julieʼs Bicycle is a not-for-profit organisation working with the arts and creative industries to navigate climate change and broader environmental sustainability.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
24	Climate Parliament	Exact match	Brighton, United KingdomHQ recorded Sep 19, 2026	11-50	37 contacts →
	Exact match “Legislators working worldwide to combat climate change.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
25	Chapter Zero	Exact match	London, United KingdomHQ recorded Sep 19, 2026	n/a	35 contacts →
	Exact match “Given the far-reaching impact and implications, our purpose is to enable Chairs, Committee Chairs and non-executive directors to better understand how climate change is likely to…” Recorded in the RevenueBase company graph · Sep 19, 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 “climate change organizations”. 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 25 of 552 climate change organizations based in the United Kingdom

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Climate change organizations based in the United Kingdom at a glance

As of Sep 19, 2026

30.1%Verified-email coverage

12.8Average contacts per company

1-10Median size (employees)

48.2%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

398

11-50

113

51-200

201-500

501-1,000

1,001-5,000

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 552 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 “climate change organizations” 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 2,132 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 September 19, 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 “climate change organizations”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many climate change organizations are there based in the United Kingdom?

RevenueBase identified 552 company matches for climate change organizations associated with the United Kingdom as of September 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?

C40 Cities tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most climate change organizations?

London leads with 266 company records, followed by Oxford (23) and Bristol (12).

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 2,132 professional contacts with verified work emails tracked across these 552 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 September 19, 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.