Company lists · Data refreshed September 2026

Top 25 Impact investment firms based in the United Kingdom

Name: 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 3, 2026 349 companies tracked

RevenueBase identified 349 impact investment firms headquartered in the United Kingdom as of September 2026 and tracks 3,833 professional contacts across them, including 1,899 with verified work emails and 289 with mobile numbers. London is the largest hub.

This list covers impact investment firms 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 3, 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 3, 2026 86% judged on-target in blind review

349Companies

3,833Contacts tracked

1,899Verified emails

289Mobile numbers

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The 25 largest impact investment firms based in the United Kingdom

Ranked by team size

Top 25 of 349 impact investment firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 3, 2026. RevenueBase Smart Search rates how each company's information relates to impact investment firms: 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	Gresham House	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	201-500	223 contacts →
	Indirect evidence “Gresham House is a specialist investor focused on delivering financial returns for clients by investing in the global themes shaping our future.” Source: RevenueBase Database · checked Sep 3, 2026
2	Ccla Investment Management	Strong evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	205 contacts →
	Strong evidence “Our purpose is to help our clients maximise their impact on society by harnessing the power of investment markets.” Source: RevenueBase Database · checked Sep 3, 2026
3	Generation Investment Management	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	155 contacts →
	Partial evidence “Overview Generation was established in 2004 as an independent, private, investment management partnership with offices in London and San Francisco.” Source: RevenueBase Database · checked Sep 3, 2026
4	Better Society Capital	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	120 contacts →
	Partial evidence “Better Society Capital is the UK’s leading social impact investor.” Source: RevenueBase Database · checked Sep 3, 2026
5	Waverton Investment Management	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	201-500	94 contacts →
	Partial evidence “Waverton is an award-winning investment management house dedicated to creating high-quality investment solutions and providing bespoke, personal service for private clients…” Source: RevenueBase Database · checked Sep 3, 2026
6	The Ingenious Group	Strong evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	89 contacts →
	Strong evidence “We believe that our investments should deliver not only for our investors but also create a positive impact for the communities in which we operate.” Source: RevenueBase Database · checked Sep 3, 2026
7	Agdevco	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	84 contacts →
	Partial evidence “AgDevCo is a specialist impact investor operating exclusively in the agriculture sector in Africa.” Source: RevenueBase Database · checked Sep 3, 2026
8	Edentree Investment Management	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	65 contacts →
	Partial evidence “EdenTree is a sustainable investment manager with a strong heritage.” Source: RevenueBase Database · checked Sep 3, 2026
9	GSG Impact	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	65 contacts →
	Partial evidence “GSG Impact builds impact economies.” Source: RevenueBase Database · checked Sep 3, 2026
10	Development Partners International DPI	Strong evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	62 contacts →
	Strong evidence “DPI is an Africa focused private investment firm with US$3.1 billion in assets under management and co-investments across three funds, targeting high growth, impact-driven, and…” Source: RevenueBase Database · checked Sep 3, 2026
11	River Global Investors RGI	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	62 contacts →
	Partial evidence “River Global Investors is an investment management company offering a range of UK, European, Indian and Global strategies.” Source: RevenueBase Database · checked Sep 3, 2026
12	Temporis Capital	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	60 contacts →
	Partial evidence “Temporis was founded in 2011 by three seasoned investment industry professionals.” Source: RevenueBase Database · checked Sep 3, 2026
13	Apis Partners	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	57 contacts →
	Indirect evidence “Headquartered in London, the Apis Group (“Apis”) is a private equity firm investing in tech-enabled financial infrastructure and services across Europe and growth markets, with…” Source: RevenueBase Database · checked Sep 3, 2026
14	Lagata	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	52 contacts →
	Indirect evidence “Lagata invest in businesses in growth markets, with a specific expertise in emerging markets and particularly in sub-Saharan Africa.” Source: RevenueBase Database · checked Sep 3, 2026
15	Greenbank	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	46 contacts →
	Partial evidence “Tailored investment services, delivered sustainably.” Source: RevenueBase Database · checked Sep 3, 2026
16	BIG Issue Invest	Strong evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	45 contacts →
	Strong evidence “Big Issue Invest is the investment arm of the Big Issue Group, founded by visionary impact entrepreneurs John Bird and Nigel Kershaw.” Source: RevenueBase Database · checked Sep 3, 2026
17	Gravis	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	43 contacts →
	Partial evidence “At Gravis we believe in a long-term approach to investment.” Source: RevenueBase Database · checked Sep 3, 2026
18	Finance Earth	Strong evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	41 contacts →
	Strong evidence “Finance Earth (formerly Environmental Finance) is a leading environmental impact investment advisor and fund manager, working across the conservation, natural and built asset…” Source: RevenueBase Database · checked Sep 3, 2026
19	Evenlode Investment	Partial evidence	Evenlode, United KingdomHQ checked Sep 3, 2026	11-50	40 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 3, 2026
20	GC Insight	Partial evidence	Manchester, United KingdomHQ checked Sep 3, 2026	11-50	40 contacts →
	Partial evidence “PURPOSE-DRIVEN RESEARCH & ADVICE SERVICES We are a social enterprise, committed to generating social value impacts and helping our clients have a more positive impact on place…” Source: RevenueBase Database · checked Sep 3, 2026
21	Oxygen House Group	Strong evidence	Exeter, United KingdomHQ checked Sep 3, 2026	51-200	40 contacts →
	Strong evidence “Oxygen House focuses on impact investment in data analytics, education, sustainable property development, renewable energy, and city planning, leveraging patient capital for a…” Source: RevenueBase Database · checked Sep 3, 2026
22	NET Purpose	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	40 contacts →
	Partial evidence “Net Purpose is the platform for sustainable and impact investors.” Source: RevenueBase Database · checked Sep 3, 2026
23	Zouk Capital LLP	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	38 contacts →
	Indirect evidence “Zouk Capital is a fund manager focused on the opportunities emerging at the intersection of infrastructure, technology and sustainability.” Source: RevenueBase Database · checked Sep 3, 2026
24	Tribe Impact Capital	Partial evidence	London, United KingdomHQ checked Sep 3, 2026	11-50	34 contacts →
	Partial evidence “Tribe is the UK’s first dedicated Impact Wealth Manager and offers discretionary and advisory portfolio management.” Source: RevenueBase Database · checked Sep 3, 2026
25	Puma Capital Group	Indirect evidence	London, United KingdomHQ checked Sep 3, 2026	51-200	32 contacts →
	Indirect evidence “Simply put, we invest in relationships to amplify the success of the people, businesses and projects we support.” Source: RevenueBase Database · checked Sep 3, 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: impact investment firms. 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 impact investment firms.
Partial evidence: Its own public description names part of impact investment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name impact investment firms. 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 349 impact investment firms based in the United Kingdom

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Impact investment firms based in the United Kingdom at a glance

As of Sep 3, 2026

49.5%Verified-email coverage

7.5%Mobile-number coverage

11.0Average contacts per company

1-10Median size (employees)

71.6%Largest-city concentration · London

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

223

11-50

51-200

201-500

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

14131–60

1,08361–90

67090–180

5180+

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 impact investment firms, 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 “impact investment firms”. 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 impact investment firms), 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 impact investment firms, 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, 1,899 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 3, 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.

Impact investment firms by metro

Impact investment firms in London250

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 impact investment firms, 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 impact investment firms are there based in the United Kingdom?

RevenueBase identified 349 impact investment firms 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?

Gresham House, headquartered in Witney, tops this list with the largest team on record.

Which city has the most impact investment firms?

London leads with 250 headquartered companies, followed by Edinburgh (6) 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 1,899 verified decision-maker contacts tracked across these 349 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 3, 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.