Company lists · Data refreshed September 2026
Top 25 Ocean and marine conservation organizations based in the United Kingdom
RevenueBase identified 141 ocean and marine conservation organizations headquartered in the United Kingdom as of September 2026 and tracks 3,072 professional contacts across them, including 1,381 with verified work emails. London is the largest hub.
This list covers ocean and marine 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 20, 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.
The 25 largest ocean and marine conservation organizations based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 357 contacts → | ||||
Partial evidence “The Marine Stewardship Council is an international non-profit organisation.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 255 contacts → | ||||
Partial 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 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 88 contacts → | ||||
Partial evidence “Known as Blue Marine, this UK registered charity was set up in 2010 by some of the team behind the award-winning documentary film ‘The End of the Line’.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 77 contacts → | ||||
Partial evidence “WDC, Whale and Dolphin Conservation (formerly WDCS) is the leading global charity dedicated to the conservation and protection of whales and dolphins.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 74 contacts → | ||||
Partial evidence “ORCA is a whale and dolphin conservation charity, dedicated to the long-term protection of whales, dolphins and porpoises, and their habitats.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 71 contacts → | ||||
Strong evidence “Ocean Conservation with a difference.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 62 contacts → | ||||
Partial evidence “The Manta Trust takes a multidisciplinary approach to the worldwide conservation of manta and mobula rays and their habitat through robust science and research, while raising…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 53 contacts → | ||||
Strong evidence “The National Marine Aquarium (NMA) is the UK’s largest aquarium, located in Britain’s Ocean City, Plymouth.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 45 contacts → | ||||
Strong evidence “A non-profit, female empowerment organisation in the ocean science & conservation space.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 12 | 33 contacts → | ||||
Indirect evidence “Olive Ridley Project is on a mission to protect sea turtles and their habitats through rescue, rehabilitation, scientific research, education and outreach.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 33 contacts → | ||||
Strong evidence “Established in 2013 by a group of seagrass scientists, Project Seagrass is a global facing marine conservation organisation securing a future for seagrass.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 26 contacts → | ||||
Strong evidence “OceanMind is a UK-based non-profit organisation that powers marine enforcement and compliance to protect the ocean's ability to provide for human wellbeing.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 15 | 25 contacts → | ||||
Partial evidence “We are empowering an inclusive global movement to tackle Ocean threats through Science and Storytelling.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 16 | 22 contacts → | ||||
Partial evidence “MARINElife is an exciting UK based charity established to co-ordinate and develop a growing portfolio of global cetacean & seabird research and monitoring projects.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 17 | 21 contacts → | ||||
Indirect evidence “Sharks are one of the most fascinating, iconic and environmentally important animal groups on the planet.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 18 | 19 contacts → | ||||
Indirect evidence “We work directly with local communities to ensure whales, dolphins and porpoises are protected and valued throughout Scotland’s west coast.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 19 contacts → | ||||
Strong evidence “Formed in 1997, the CRRU is a marine conservation charity dedicated to the study, conservation and understanding of UK whales, dolphins and porpoises (cetaceans) in northeast…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 18 contacts → | ||||
Strong evidence “WiseOceans is a global marine conservation and education company that employs three core strategies: We educate: With our world-class ocean outreach activities WiseOceans is…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 17 contacts → | ||||
Indirect evidence “Reef-World’s vision is to make sustainable diving and snorkelling the social norm by inspiring and empowering the community of divers, snorkellers and related businesses, in order…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 22 | 16 contacts → | ||||
Partial evidence “Nekton is a global network advancing the scientific exploration of the ocean.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 15 contacts → | ||||
Partial evidence “The St Abbs Marine Station is the vision of a group of donors who are passionate about trying to tackle the major challenges facing the marine environment – not least from climate…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 14 contacts → | ||||
Indirect evidence “Did you know, the average length of time to describe a new species is 13.5 years?” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 25 | 13 contacts → | ||||
Strong evidence “Sea-Changers is a UK marine conservation charity driving local action for lasting change.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
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: ocean and marine 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 ocean and marine conservation organizations.
- Partial evidence
- Its own public description names part of ocean and marine conservation organizations, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name ocean and marine 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 141 ocean and marine conservation organizations based in the United Kingdom
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Ocean and marine conservation organizations based in the United Kingdom at a glance
As of Sep 20, 2026Companies by employee count
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 141 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 ocean and marine 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 “ocean and marine 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 ocean and marine 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 ocean and marine 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, 1,381 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 20, 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.
Ocean and marine conservation organizations by metro
- Ocean and marine conservation organizations in London35
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 ocean and marine 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 ocean and marine conservation organizations are there based in the United Kingdom?
RevenueBase identified 141 ocean and marine 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?
Marine Stewardship Council MSC, headquartered in London, tops this list with the largest team on record.
Which city has the most ocean and marine conservation organizations?
London leads with 35 headquartered companies, followed by Plymouth (8) and Bristol (5).
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 1,381 verified decision-maker contacts tracked across these 141 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 20, 2026.
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Ocean and marine conservation organizations by geography
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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.
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