Company lists · Data refreshed September 2026

Top 25 Conservation organizations based in the United Kingdom

Name: Conservation 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 589 companies tracked

RevenueBase identified 589 conservation organizations headquartered in the United Kingdom as of September 2026 and tracks 13,182 professional contacts across them, including 5,266 with verified work emails. London is the largest hub.

This list covers conservation organizations 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 19, 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 19, 2026 86% judged on-target in blind review

589Companies

13,182Contacts tracked

5,266Verified emails

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The 25 largest conservation organizations based in the United Kingdom

Ranked by team size

Top 25 of 589 conservation organizations based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to conservation organizations: 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	Zoological Society Of London ZSL	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	1,001-5,000	937 contacts →
	Strong evidence “As the original science-driven conservation organisation, we’re working to restore wildlife in the UK and around the world.” Source: RevenueBase Database · checked Sep 19, 2026
2	Groundwork	Indirect evidence	Birmingham, United KingdomHQ checked Sep 19, 2026	1,001-5,000	750 contacts →
	Indirect evidence “Groundwork takes practical action to create a fair and green future in which people, places, and nature thrive.” Source: RevenueBase Database · checked Sep 19, 2026
3	Fauna & Flora	Indirect evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	501-1,000	576 contacts →
	Indirect evidence “Fauna & Flora's work spans across the globe, with over 100 projects in more than 40 countries.” Source: RevenueBase Database · checked Sep 19, 2026
4	Birdlife International	Indirect evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	51-200	330 contacts →
	Indirect evidence “We’re BirdLife International, the only global Partnership conserving birds and all life on our planet.” Source: RevenueBase Database · checked Sep 19, 2026
5	Clientearth	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	324 contacts →
	Indirect evidence “We are a non-profit using the power of the law to bring about end-to-end systemic change: informing, implementing and enforcing the law, drafting and advising decision-makers on…” Source: RevenueBase Database · checked Sep 19, 2026
6	Blue Ventures	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	255 contacts →
	Indirect evidence “We believe the power to restore our oceans lives in the coastal communities bearing witness to the planetary crises.” Source: RevenueBase Database · checked Sep 19, 2026
7	The Royal Zoological Society Of Scotland	Strong evidence	Edinburgh, United KingdomHQ checked Sep 19, 2026	201-500	177 contacts →
	Strong evidence “We are the Royal Zoological Society for Scotland (RZSS), and for over 100 years we’ve been a leading conservation and education charity as well as an amazing, award-winning…” Source: RevenueBase Database · checked Sep 19, 2026
8	Greenpeace UK	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	167 contacts →
	Indirect evidence “Greenpeace is an independent global campaigning network that acts to change attitudes and behaviour, to protect and conserve the environment and to promote peace.” Source: RevenueBase Database · checked Sep 19, 2026
9	Marine Conservation Society	Strong evidence	Ross-on-wye, United KingdomHQ checked Sep 19, 2026	51-200	156 contacts →
	Strong evidence “The Marine Conservation Society is the UK's leading marine charity working towards a cleaner, better protected and healthier ocean, for everyone Today, our ocean is in poor health…” Source: RevenueBase Database · checked Sep 19, 2026
10	Virunga Foundation	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	151 contacts →
	Indirect evidence “The Virunga Foundation supports the work of Virunga National Park, the UNESCO World Heritage Site which is home to the last of the world's critically endangered mountain gorillas.” Source: RevenueBase Database · checked Sep 19, 2026
11	Lancashire Wildlife Trust	Strong evidence	Bamber Bridge, United KingdomHQ checked Sep 19, 2026	51-200	138 contacts →
	Strong evidence “We are part of the Wildlife Trusts movement, the UK's leading conservation charity dedicated to all wildlife.” Source: RevenueBase Database · checked Sep 19, 2026
12	Operation Wallacea	Indirect evidence	Lincolnshire, United KingdomHQ checked Sep 19, 2026	11-50	135 contacts →
	Indirect evidence “Operation Wallacea is a series of biological and social science expedition projects that operate in remote locations across the world.” Source: RevenueBase Database · checked Sep 19, 2026
13	Scottish Wildlife Trust	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 19, 2026	51-200	128 contacts →
	Indirect evidence “For 60 years, the Scottish Wildlife Trust has worked with its members, partners and supporters in pursuit of its vision of healthy, resilient ecosystems across Scotland’s land and…” Source: RevenueBase Database · checked Sep 19, 2026
14	Essex Wildlife Trust	Strong evidence	Colchester, United KingdomHQ checked Sep 19, 2026	51-200	126 contacts →
	Strong evidence “We are the county’s leading conservation charity, committed to protecting wildlife and inspiring a lifelong love of nature.” Source: RevenueBase Database · checked Sep 19, 2026
15	London Wildlife Trust	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	124 contacts →
	Indirect evidence “London Wildlife Trust champions nature’s recovery in London.” Source: RevenueBase Database · checked Sep 19, 2026
16	Middlemarch	Indirect evidence	Coventry, United KingdomHQ checked Sep 19, 2026	51-200	118 contacts →
	Indirect evidence “With a legacy of over 30 years, we are a UK leading independent consultancy specialising in the preservation of the natural environment.” Source: RevenueBase Database · checked Sep 19, 2026
17	The Game & Wildlife Conservation Trust	Strong evidence	Fordingbridge, United KingdomHQ checked Sep 19, 2026	51-200	117 contacts →
	Strong evidence “The leading UK conservation charity conducting scientific research and developing sympathetic ways of managing the countryside for the benefit of Britain's game and wildlife.” Source: RevenueBase Database · checked Sep 19, 2026
18	Hampshire & Isle Of Wight Wildlife Trust	Indirect evidence	Curdridge, United KingdomHQ checked Sep 19, 2026	51-200	116 contacts →
	Indirect evidence “For over 60 years Hampshire & Isle of Wight Wildlife Trust have protected the wildlife and wild places of Hampshire, the Island and our local seas.” Source: RevenueBase Database · checked Sep 19, 2026
19	A Rocha International	Strong evidence	London, United KingdomHQ checked Sep 19, 2026	201-500	107 contacts →
	Strong evidence “A Rocha is a global family of conservation organizations working together to live out God’s calling to care for creation and equip others to do likewise.” Source: RevenueBase Database · checked Sep 19, 2026
20	Surfers Against Sewage	Strong evidence	St. Agnes, United KingdomHQ checked Sep 19, 2026	11-50	103 contacts →
	Strong evidence “Surfers Against Sewage is a national marine conservation and campaigning charity that inspires, unites and empowers communities to take action to protect the ocean and our blue…” Source: RevenueBase Database · checked Sep 19, 2026
21	Keep Britain Tidy	Indirect evidence	Wigan, United KingdomHQ checked Sep 19, 2026	51-200	103 contacts →
	Indirect evidence “Keep Britain Tidy is an independent environmental charity that fights for people’s right to live and work in a place of which they can be proud.” Source: RevenueBase Database · checked Sep 19, 2026
22	Berkshire, Buckinghamshire & Oxfordshire Wildlife Trust Bbowt	Indirect evidence	Farmoor, United KingdomHQ checked Sep 19, 2026	51-200	102 contacts →
	Indirect evidence “BBOWT has a bold vision of a wilder Berkshire, Buckinghamshire and Oxfordshire, with more nature everywhere for everyone – in towns and rural areas.” Source: RevenueBase Database · checked Sep 19, 2026
23	Environmental Justice Foundation EJF	Indirect evidence	London, United KingdomHQ checked Sep 19, 2026	51-200	94 contacts →
	Indirect evidence “The Environmental Justice Foundation (EJF) exists to protect the natural world and defend our basic human right to a secure environment.” Source: RevenueBase Database · checked Sep 19, 2026
24	Born Free Foundation	Indirect evidence	Horsham, United KingdomHQ checked Sep 19, 2026	11-50	94 contacts →
	Indirect evidence “We work tirelessly to ensure that all wild animals, whether living in captivity or in the wild, are treated with compassion and respect.” Source: RevenueBase Database · checked Sep 19, 2026
25	Arcos Network Page	Strong evidence	Cambridge, United KingdomHQ checked Sep 19, 2026	51-200	87 contacts →
	Strong evidence “The Albertine Rift Conservation Society (ARCOS Network) is a regional conservation organization with the mission to enhance biodiversity conservation and sustainable management of…” Source: RevenueBase Database · checked Sep 19, 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: conservation organizations. 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 conservation organizations.
Partial evidence: Its own public description names part of conservation organizations, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name conservation organizations. 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 589 conservation organizations based in the United Kingdom

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Conservation organizations based in the United Kingdom at a glance

As of Sep 19, 2026

39.9%Verified-email coverage

22.4Average contacts per company

1-10Median size (employees)

24.6%Largest-city concentration · London

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

389

11-50

133

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 589 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 conservation organizations, 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 “conservation organizations”. 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 conservation organizations), 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 conservation organizations, 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, 5,266 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 19, 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.

Conservation organizations by metro

Conservation organizations in London145

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 conservation organizations, 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 conservation organizations are there based in the United Kingdom?

RevenueBase identified 589 conservation organizations 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?

Zoological Society Of London ZSL, headquartered in London, tops this list with the largest team on record.

Which city has the most conservation organizations?

London leads with 145 headquartered companies, followed by Cambridge (15) and Oxford (13).

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 5,266 verified decision-maker contacts tracked across these 589 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 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 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.