Company lists · Data refreshed September 2026

Top 25 Environmental impact investment firms based in the United Kingdom

Name: Environmental impact 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 429 companies tracked

RevenueBase identified 429 company matches for environmental impact investment firms associated with the United Kingdom as of September 2026 and tracks 5,377 professional contacts across them, including 2,768 with verified work emails. London is the largest hub.

This list covers company matches for environmental impact 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

429Companies

5,377Contacts tracked

2,768Verified emails

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The 25 largest environmental impact investment firms based in the United Kingdom

Ranked by team size

Top 25 of 429 company matches for environmental impact 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	ACTIS	Exact match	London, United KingdomHQ recorded Sep 28, 2026	201-500	493 contacts →
	Exact match “Actis is a leading growth market investor in sustainable infrastructure.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2	Impax Asset Management	Exact match	London, United KingdomHQ recorded Sep 28, 2026	201-500	331 contacts →
	Exact match “Founded in 1998, Impax is a specialist asset manager investing in the opportunities arising from the transition to a more sustainable global economy.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3	Gresham House	Exact match	London, United KingdomHQ recorded Sep 28, 2026	201-500	227 contacts →
	Exact match “Gresham House is a specialist investor focused on delivering financial returns for clients by investing in the global themes shaping our future.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4	Generation Investment Management	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	156 contacts →
	Exact match “Overview Generation was established in 2004 as an independent, private, investment management partnership with offices in London and San Francisco.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5	Octopus Energy Generation	Exact match	London, United KingdomHQ recorded Sep 28, 2026	201-500	153 contacts →
	Exact match “At Octopus Energy Generation, we’re building green power for the future, from large-scale solar to onshore and offshore wind, and innovative initiatives like the Fan Club.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6	Lightrock	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	141 contacts →
	Exact match “Lightrock is a global investment platform supporting the growth of technology-enabled companies.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7	Pollination	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	139 contacts →
	Exact match “Pollination is a specialist climate investment and advisory firm, dedicated to accelerating the transition to a net zero, nature positive and resilient future.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8	Schroders Greencoat LLP	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	119 contacts →
	Exact match “Schroders Greencoat is a specialist investment manager dedicated to renewable infrastructure, with over £8.5 billion under management.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Stafford Capital Partners	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	97 contacts →
	Exact match “Stafford Capital Partners ("Stafford") is an independent private markets investment and advisory firm with USD 8.9bn in assets under management and advice for more than 150+…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10	Nextenergy Capital	Exact match	London, United KingdomHQ recorded Sep 28, 2026	201-500	83 contacts →
	Exact match “NextEnergy Capital was founded in 2007 to become the leading specialist investment and asset manager in the solar sector.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11	Sustainable Development Capital, LLP Sdcl	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	74 contacts →
	Exact match “Sustainable Development Capital LLP (“SDCL”) is a multi-national investment and financial advisory firm, which specialises in environmental infrastructure.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12	Bridges Fund Management	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	73 contacts →
	Exact match “Bridges is a specialist private markets investor.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Xynteo	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	70 contacts →
	Exact match “Xynteo is a boutique advisory firm, based in Europe and India, on a mission to help global organisations and investors accelerate sustainable impact and value creation.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Thirdway Partners	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	68 contacts →
	Exact match “ThirdWay Partners operates as an impact investment and advisory firm focused on creating inclusive sustainable development and impact.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15	Climate Asset Management	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	66 contacts →
	Exact match “Climate Asset Management was formed in 2020 as a joint venture of HSBC Asset Management and Pollination, with the ambition to grow the world’s leading asset management company in…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16	CAMCO	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	65 contacts →
	Exact match “Camco is a climate and impact fund manager, leading the transition to a prosperous net zero future in emerging markets.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	River Global Investors RGI	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	63 contacts →
	Exact match “RIVER GLOBAL HOLDINGS (RGH) WAS ACQUIRED BY LIONTRUST ON 30 JUNE 2026.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Temporis Capital	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	62 contacts →
	Exact match “Temporis was founded in 2011 by three seasoned investment industry professionals.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	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
20	RAB Capital	Exact match	London, United KingdomHQ recorded Sep 28, 2026	n/a	62 contacts →
	Exact match “RAB Capital is a private company that invests in a wide range of assets based on fundamental analysis.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Just Climate	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	56 contacts →
	Exact match “Established by Generation Investment Management, Just Climate is a specialist investment business focused on scaling solutions for the highest-emitting, most off-track sectors of…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Ecofin	Exact match	London, United KingdomHQ recorded Sep 28, 2026	11-50	51 contacts →
	Exact match “The Ecofin team at Redwheel manages a range of global equity thematic strategies with the aim of delivering strong risk-adjusted returns to clients while tackling some of the…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Greenbank	Exact match	London, United KingdomHQ recorded Sep 28, 2026	51-200	45 contacts →
	Exact match “Tailored investment services, delivered sustainably.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Gravis	Exact match	Mayfair, United KingdomHQ recorded Sep 28, 2026	51-200	43 contacts →
	Exact match “At Gravis we believe in a long-term approach to investment.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	Evenlode Investment	Exact match	Evenlode, United KingdomHQ recorded Sep 28, 2026	11-50	41 contacts →
	Exact match “Evenlode Investment Management is an employee-owned, North Cotswolds based investment company, with a sole focus on investing in the shares of high-quality companies over the long…” 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 “environmental impact 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 429 environmental impact investment firms based in the United Kingdom

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Environmental impact investment firms based in the United Kingdom at a glance

As of Sep 28, 2026

51.5%Verified-email coverage

12.5Average contacts per company

1-10Median size (employees)

72.5%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

269

11-50

123

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 429 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 “environmental impact 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 2,768 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.

Environmental impact investment firms by metro

Environmental impact investment firms in London311

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

How many environmental impact investment firms are there based in the United Kingdom?

RevenueBase identified 429 company matches for environmental impact 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?

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

Which city has the most environmental impact investment firms?

London leads with 311 company records, followed by Bristol (8) and Edinburgh (5).

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 2,768 professional contacts with verified work emails tracked across these 429 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.