Company lists · Data refreshed September 2026

Top 25 Green hydrogen investment firms based in the United Kingdom

Name: Green hydrogen investment firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 117 companies tracked

RevenueBase identified 117 company matches for green hydrogen investment firms associated with the United Kingdom as of September 2026 and tracks 1,765 professional contacts across them, including 687 with verified work emails. London is the largest hub.

This list covers company matches for green hydrogen investment firms 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 28, 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 28, 2026 How this list was built

117Companies

1,765Contacts tracked

687Verified emails

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The 25 largest green hydrogen investment firms based in the United Kingdom

Ranked by team size

Top 25 of 117 company matches for green hydrogen investment firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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	Geopura	Exact match	Newcastle, United KingdomHQ recorded Sep 28, 2026	51-200	137 contacts →
	Exact match “GeoPura has a totally zero emissions answer to how we’re going to generate and distribute the vast amount of energy required to decarbonise our global economies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Everoze	Exact match	Bristol, United KingdomHQ recorded Sep 28, 2026	51-200	100 contacts →
	Exact match “Everoze is an employee-owned renewables, green hydrogen and storage consultancy.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Climate Investment CI	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	62 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 · Sep 28, 2026 · View company records in RevenueBase
4	Ylem Energy	Exact match	Manchester, United KingdomHQ recorded Sep 28, 2026	51-200	51 contacts →
	Exact match “YLEM Energy is a leading independent power generation specialist with more than three decades’ experience in building, owning and operating smart generation systems.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Bohr Limited	Exact match	Stone, United KingdomHQ recorded Sep 28, 2026	51-200	49 contacts →
	Exact match “We're focused on delivering products and solutions to the green energy industry with a strong focus on Hydrogen, Biomethane and Natural Gas.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	National Energy	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	41 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 · Sep 28, 2026 · View company records in RevenueBase
7	Supercritical	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	39 contacts →
	Exact match “The world's first high pressure, ultra-efficient electrolyser for the lowest cost of pressurised green hydrogen.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Ryze Power	Exact match	Oxford, United KingdomHQ recorded Sep 28, 2026	51-200	33 contacts →
	Exact match “Ryze Power provides complete solutions in the alternative fuels space as sectors transition towards net zero.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	AP Ventures	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	31 contacts →
	Exact match “AP Ventures is an independent venture capital firm headquartered in London, with offices in San Francisco and South Africa.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Hive Energy	Exact match	East Wellow, United KingdomHQ recorded Sep 28, 2026	201-500	29 contacts →
	Exact match “Hive Energy is on a mission to save the planet.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Hygen Energy	Exact match	Oxford, United KingdomHQ recorded Sep 28, 2026	11-50	25 contacts →
	Exact match “Hygen is a leading developer, producer and asset owner of low-carbon hydrogen production facilities in the UK and Europe, focusing on the decarbonisation of mobility…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Green CAT Hydrogen LTD	Exact match	Edinburgh, United KingdomHQ recorded Sep 28, 2026	11-50	24 contacts →
	Exact match “Green Cat Hydrogen develops green hydrogen projects.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	EET Hydrogen	Exact match	Stanlow, United KingdomHQ recorded Sep 28, 2026	11-50	22 contacts →
	Exact match “EET Hydrogen is a leading player in the energy transition and is developing the first large scale, low carbon hydrogen production hub in the UK.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Carlton Power Limited	Exact match	Stokesley, United KingdomHQ recorded Sep 28, 2026	11-50	21 contacts →
	Exact match “Carlton Power Group is an independent, UK energy development company formed in 1995, with offices in Stokesley, North Yorkshire and Edinburgh.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	N-Gen	Exact match	Leeds, United KingdomHQ recorded Sep 28, 2026	11-50	16 contacts →
	Exact match “At N-Gen, we’re helping our customers to lead the race towards decarbonisation with low carbon hydrogen.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	Clean Energy Transition LLP	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	14 contacts →
	Exact match “Clean Energy Transition LLP is an investment management partnership focused on fundamental equity investing.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Oort Energy	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	14 contacts →
	Exact match “Oort Energy is a manufacturer of green hydrogen systems for energy storage and clean fuel.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	HYCAP	Exact match	Oxford, United KingdomHQ recorded Sep 28, 2026	11-50	13 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 · Sep 28, 2026 · View company records in RevenueBase
19	Clean Growth Fund	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	13 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 · Sep 28, 2026 · View company records in RevenueBase
20	Regener8 Power	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	13 contacts →
	Exact match “Regener8 Power is a sustainable and ethical renewable energy company.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Buckthorn Partners LLP	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	11 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 · Sep 28, 2026 · View company records in RevenueBase
22	Susten	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	11 contacts →
	Exact match “We invest in new energy technologies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Telis Energy	Exact match	London, United KingdomHQ recorded Sep 28, 2026	1-10	11 contacts →
	Exact match “Telis Energy is a UK-based green energy projects developer and investor.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Pluszero LTD	Exact match	Edinburgh, United KingdomHQ recorded Sep 28, 2026	1-10	10 contacts →
	Exact match “PlusZero Ltd is Making Hydrogen Happen - Our PlusZero Energy brand produces green hydrogen, with our first production site in the Outer Hebrides, the most rapidly scalable…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Sunways Global Group	Exact match	West End, United KingdomHQ recorded Sep 28, 2026	11-50	10 contacts →
	Exact match “Sunways Global is a Renewable Energy Development company with focus in India, South East Asia and Middle East.” Recorded in the RevenueBase company graph · Sep 28, 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 “green hydrogen investment firms”. 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 117 green hydrogen investment firms based in the United Kingdom

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Green hydrogen investment firms based in the United Kingdom at a glance

As of Sep 28, 2026

38.9%Verified-email coverage

15.1Average contacts per company

1-10Median size (employees)

47.0%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 117 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 “green hydrogen investment firms” 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 687 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 28, 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.

Green hydrogen investment firms by metro

Green hydrogen investment firms in London55

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 “green hydrogen investment firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many green hydrogen investment firms are there based in the United Kingdom?

RevenueBase identified 117 company matches for green hydrogen investment firms 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?

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

Which city has the most green hydrogen investment firms?

London leads with 55 company records, followed by Edinburgh (5) and Bristol (3).

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 687 professional contacts with verified work emails tracked across these 117 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 28, 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.