Company lists · Data refreshed September 2026

Top 25 Sustainability focused investors based in the United Kingdom

Name: Sustainability focused investors based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 203 companies tracked

RevenueBase identified 203 sustainability focused investors headquartered in the United Kingdom as of September 2026 and tracks 4,366 professional contacts across them, including 2,038 with verified work emails. London is the largest hub.

This list covers sustainability focused investors 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 22, 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 22, 2026 86% judged on-target in blind review

203Companies

4,366Contacts tracked

2,038Verified emails

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The 25 largest sustainability focused investors based in the United Kingdom

Ranked by team size

Top 25 of 203 sustainability focused investors based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to sustainability focused investors: 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	Federated Hermes Limited	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	501-1,000	451 contacts →
	Indirect evidence “Federated Hermes is guided by the conviction that responsible investing is the best way to create long-term wealth.” Source: RevenueBase Database · checked Sep 22, 2026
2	Impax Asset Management	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	331 contacts →
	Indirect evidence “Founded in 1998, Impax is a specialist asset manager investing in the opportunities arising from the transition to a more sustainable global economy.” Source: RevenueBase Database · checked Sep 22, 2026
3	Gresham House	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	227 contacts →
	Strong 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 22, 2026
4	ESG Book	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	212 contacts →
	Indirect evidence “ESG Book and EthiFinance have merged!” Source: RevenueBase Database · checked Sep 22, 2026
5	Generation Investment Management	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	156 contacts →
	Indirect 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 22, 2026
6	Continuum Financial Services LLP	Indirect evidence	Plymouth, United KingdomHQ checked Sep 22, 2026	51-200	110 contacts →
	Indirect evidence “We are an award-winning National Independent Financial Advice firm that offers a modern financial advice service.” Source: RevenueBase Database · checked Sep 22, 2026
7	Holtara An Apex Group Company	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	100 contacts →
	Indirect evidence “Our mission is to positively impact businesses today, for a sustainable tomorrow.” Source: RevenueBase Database · checked Sep 22, 2026
8	Columbia Threadneedle Investments Emea Apac	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	1,001-5,000	96 contacts →
	Indirect evidence “At Columbia Threadneedle Investments, we invest to make a difference in your world, and the wider world.” Source: RevenueBase Database · checked Sep 22, 2026
9	Waverton Investment Management	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	92 contacts →
	Indirect 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 22, 2026
10	Sustainable Development Capital, LLP Sdcl	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	74 contacts →
	Indirect evidence “Sustainable Development Capital LLP (“SDCL”) is a multi-national investment and financial advisory firm, which specialises in environmental infrastructure.” Source: RevenueBase Database · checked Sep 22, 2026
11	Legal & General Investment Management Lgim	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	1,001-5,000	74 contacts →
	Partial evidence “We are aware that a small number of investors have been targeted by fraudsters using the LGIM and L&G brands to promote fake funds and investment products.” Source: RevenueBase Database · checked Sep 22, 2026
12	Edentree Investment Management	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	67 contacts →
	Indirect evidence “EdenTree is a sustainable investment manager with a strong heritage.” Source: RevenueBase Database · checked Sep 22, 2026
13	River Global Investors RGI	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	63 contacts →
	Indirect evidence “RIVER GLOBAL HOLDINGS (RGH) WAS ACQUIRED BY LIONTRUST ON 30 JUNE 2026.” Source: RevenueBase Database · checked Sep 22, 2026
14	Heptagon Capital	Partial evidence	Mayfair, United KingdomHQ checked Sep 22, 2026	11-50	52 contacts →
	Partial evidence “Heptagon Capital, founded in 2005, is a leading provider of specialised asset management services and investment solutions to Institutional Investors, Family Offices and Ultra…” Source: RevenueBase Database · checked Sep 22, 2026
15	Ecofin	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	51 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 22, 2026
16	Castlefield	Indirect evidence	Manchester, United KingdomHQ checked Sep 22, 2026	51-200	46 contacts →
	Indirect evidence “We're Castlefield - an award-winning, employee-owned investment management and financial planning group, recognised for being at the forefront of ethical investing since 2002.” Source: RevenueBase Database · checked Sep 22, 2026
17	Greenbank	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	45 contacts →
	Indirect evidence “Tailored investment services, delivered sustainably.” Source: RevenueBase Database · checked Sep 22, 2026
18	Gravis	Indirect evidence	Mayfair, United KingdomHQ checked Sep 22, 2026	51-200	43 contacts →
	Indirect evidence “At Gravis we believe in a long-term approach to investment.” Source: RevenueBase Database · checked Sep 22, 2026
19	Troy Asset Management Limited	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	42 contacts →
	Partial evidence “Our aim is to protect investors’ capital and increase its value over the long-term.” Source: RevenueBase Database · checked Sep 22, 2026
20	Evenlode Investment	Partial evidence	Evenlode, United KingdomHQ checked Sep 22, 2026	11-50	41 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 22, 2026
21	Osmosis Investment Management	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	40 contacts →
	Partial evidence “Osmosis’ mission since 2009 has been to become the world’s leading dedicated sustainable asset manager, delivering client-focused investment solutions across multiple asset…” Source: RevenueBase Database · checked Sep 22, 2026
22	Impact Cubed	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	40 contacts →
	Indirect evidence “Impact Cubed is a specialist investment advisor and data provider with the mission of aligning the allocation of capital with a sustainable future.” Source: RevenueBase Database · checked Sep 22, 2026
23	NET Purpose	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	40 contacts →
	Partial evidence “Net Purpose is the platform for sustainable and impact investors.” Source: RevenueBase Database · checked Sep 22, 2026
24	Earth Active LTD	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	39 contacts →
	Indirect evidence “Earth Active is an award-winning consultancy with a globally experienced team of bespoke ESG advisors and expert specialists that provide investment and risk due diligence in…” Source: RevenueBase Database · checked Sep 22, 2026
25	Tribe Impact Capital	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	34 contacts →
	Indirect evidence “Tribe is the UK’s first dedicated Impact Wealth Manager and offers discretionary and advisory portfolio management.” Source: RevenueBase Database · checked Sep 22, 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: sustainability focused investors. 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 sustainability focused investors.
Partial evidence: Its own public description names part of sustainability focused investors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainability focused investors. 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 203 sustainability focused investors based in the United Kingdom

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Sustainability focused investors based in the United Kingdom at a glance

As of Sep 22, 2026

46.7%Verified-email coverage

21.5Average contacts per company

1-10Median size (employees)

67.5%Largest-city concentration · London

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

113

11-50

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 203 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 sustainability focused investors, 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 “sustainability focused investors”. 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 sustainability focused investors), 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 sustainability focused investors, 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, 2,038 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 22, 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.

Sustainability focused investors by metro

Sustainability focused investors in London137

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 sustainability focused investors, 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 sustainability focused investors are there based in the United Kingdom?

RevenueBase identified 203 sustainability focused investors 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?

Federated Hermes Limited, headquartered in London, tops this list with the largest team on record.

Which city has the most sustainability focused investors?

London leads with 137 headquartered companies, followed by Edinburgh (6) and Bristol (3).

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 2,038 verified decision-maker contacts tracked across these 203 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 22, 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.