Company lists · Data refreshed September 2026

Top 25 Sustainable investment firms based in London, United Kingdom

Name: Sustainable investment firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 13, 2026 199 companies tracked

RevenueBase identified 199 company matches for sustainable investment firms associated with London, United Kingdom as of September 2026 and tracks 4,654 professional contacts across them, including 2,373 with verified work emails and 414 with mobile numbers. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for sustainable investment firms associated with London, 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 13, 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 13, 2026 How this list was built

199Companies

4,654Contacts tracked

2,373Verified emails

414Mobile numbers

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The 25 largest sustainable investment firms based in London, United Kingdom

Ranked by team size

Top 25 of 199 company matches for sustainable investment firms based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 13, 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 13, 2026	201-500	493 contacts →
	Exact match “Actis is a leading growth market investor in sustainable infrastructure.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
2	Federated Hermes Limited	Exact match	London, United KingdomHQ recorded Sep 13, 2026	501-1,000	451 contacts →
	Exact match “Federated Hermes is guided by the conviction that responsible investing is the best way to create long-term wealth.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
3	Impax Asset Management	Exact match	London, United KingdomHQ recorded Sep 13, 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 13, 2026 · View company records in RevenueBase
4	Gresham House	Exact match	London, United KingdomHQ recorded Sep 13, 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 13, 2026 · View company records in RevenueBase
5	Generation Investment Management	Exact match	London, United KingdomHQ recorded Sep 13, 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 13, 2026 · View company records in RevenueBase
6	Schroders Greencoat LLP	Exact match	London, United KingdomHQ recorded Sep 13, 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 13, 2026 · View company records in RevenueBase
7	Igneo Infrastructure Partners	Exact match	London, United KingdomHQ recorded Sep 13, 2026	51-200	117 contacts →
	Exact match “Sustainable Value Creation Through Partnership We seek to deliver sustainable returns through investment in mature, stable, infrastructure businesses.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
8	Holtara An Apex Group Company	Exact match	London, United KingdomHQ recorded Sep 13, 2026	51-200	100 contacts →
	Exact match “Our mission is to positively impact businesses today, for a sustainable tomorrow.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
9	Stafford Capital Partners	Exact match	London, United KingdomHQ recorded Sep 13, 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 13, 2026 · View company records in RevenueBase
10	Columbia Threadneedle Investments Emea Apac	Exact match	London, United KingdomHQ recorded Sep 13, 2026	1,001-5,000	96 contacts →
	Exact match “At Columbia Threadneedle Investments, we invest to make a difference in your world, and the wider world.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
11	Waverton Investment Management	Exact match	London, United KingdomHQ recorded Sep 13, 2026	201-500	92 contacts →
	Exact match “Waverton is an award-winning investment management house dedicated to creating high-quality investment solutions and providing bespoke, personal service for private clients…” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
12	Sustainable Development Capital, LLP Sdcl	Exact match	London, United KingdomHQ recorded Sep 13, 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 13, 2026 · View company records in RevenueBase
13	Legal & General Investment Management Lgim	Exact match	London, United KingdomHQ recorded Sep 13, 2026	1,001-5,000	74 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
14	Thirdway Partners	Exact match	London, United KingdomHQ recorded Sep 13, 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 13, 2026 · View company records in RevenueBase
15	Edentree Investment Management	Exact match	London, United KingdomHQ recorded Sep 13, 2026	51-200	67 contacts →
	Exact match “EdenTree is a sustainable investment manager with a strong heritage.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
16	Climate Asset Management	Exact match	London, United KingdomHQ recorded Sep 13, 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 13, 2026 · View company records in RevenueBase
17	River Global Investors RGI	Exact match	London, United KingdomHQ recorded Sep 13, 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 13, 2026 · View company records in RevenueBase
18	Fundsmith LLP UK	Exact match	London, United KingdomHQ recorded Sep 13, 2026	11-50	55 contacts →
	Exact match “We are an investment management firm established in 2010 by Terry Smith.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
19	Ecofin	Exact match	London, United KingdomHQ recorded Sep 13, 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 13, 2026 · View company records in RevenueBase
20	Greenbank	Exact match	London, United KingdomHQ recorded Sep 13, 2026	51-200	45 contacts →
	Exact match “Tailored investment services, delivered sustainably.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
21	Troy Asset Management Limited	Exact match	London, United KingdomHQ recorded Sep 13, 2026	11-50	42 contacts →
	Exact match “Our aim is to protect investors’ capital and increase its value over the long-term.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
22	Osmosis Investment Management	Exact match	London, United KingdomHQ recorded Sep 13, 2026	11-50	40 contacts →
	Exact match “Osmosis’ mission since 2009 has been to become the world’s leading dedicated sustainable asset manager, delivering client-focused investment solutions across multiple asset…” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
23	NET Purpose	Exact match	London, United KingdomHQ recorded Sep 13, 2026	11-50	40 contacts →
	Exact match “Net Purpose is the platform for sustainable and impact investors.” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
24	Earth Active LTD	Exact match	London, United KingdomHQ recorded Sep 13, 2026	11-50	39 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 13, 2026 · View company records in RevenueBase
25	Zouk Capital LLP	Exact match	London, United KingdomHQ recorded Sep 13, 2026	11-50	39 contacts →
	Exact match “Zouk Capital is a fund manager focused on the opportunities emerging at the intersection of infrastructure, technology and sustainability.” Recorded in the RevenueBase company graph · Sep 13, 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 “sustainable 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 199 sustainable investment firms based in London, United Kingdom

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Sustainable investment firms based in London, United Kingdom at a glance

As of Sep 13, 2026

51.0%Verified-email coverage

8.9%Mobile-number coverage

23.4Average contacts per company

1-10Median size (employees)

Sep 13, 2026Page data refreshed

Companies by employee count

1-10

110

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 16.0d

1,8950–30

45531–60

1361–90

190–180

9180+

Company record updated

Median 58.0d

00–30

2,44431–60

1,49261–90

34590–180

373180+

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 London, United Kingdom whose business descriptions match “sustainable 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 2,373 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 13, 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.

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

How many sustainable investment firms are there based in London, United Kingdom?

RevenueBase identified 199 company matches for sustainable investment firms associated with London, 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 in the United Kingdom has the most sustainable investment firms?

London leads the United Kingdom with 178 company records, followed by Edinburgh (7) and Manchester (4).

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 2,373 professional contacts with verified work emails tracked across these 199 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 13, 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.