Company lists · Data refreshed September 2026

Top 25 Thematic investment managers based in the United Kingdom

RevenueBase identified 479 company matches for thematic investment managers associated with the United Kingdom as of September 2026 and tracks 26,484 professional contacts across them, including 12,201 with verified work emails. London is the largest hub.

This list covers company matches for thematic investment managers 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 22, 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 22, 2026 How this list was built
479Companies
26,484Contacts tracked
12,201Verified emails
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The 25 largest thematic investment managers based in the United Kingdom

Ranked by team size
Top 25 of 479 company matches for thematic investment managers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 22, 20261,001-5,0003,000 contacts →

Exact match

“At Janus Henderson, we are investors – we help clients define and achieve superior financial outcomes through differentiated insights, disciplined investments, and world-class…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 22, 20261,001-5,0001,774 contacts →

Exact match

“M&G Investments is a global asset manager.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3Exact matchEdinburgh, United KingdomHQ recorded Sep 22, 20261,001-5,0001,549 contacts →

Exact match

“We are an independent investment manager founded over a century ago in Edinburgh, owned and run by 59 partners.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 22, 20261,001-5,0001,320 contacts →

Exact match

“Welcome to Aviva Investors.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 22, 2026501-1,000942 contacts →

Exact match

“Since Jupiter was established in 1985, we have sought to make a positive difference for our clients by helping them achieve their long-term investment objectives through high…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 22, 2026201-500619 contacts →

Exact match

“Content suitable for investment professionals only.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 22, 2026501-1,000451 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 22, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 22, 2026201-500403 contacts →

Exact match

“Seven Investment Management (7IM) is an investment management business that helps individuals, their families and advisers to manage their capital to meet their financial needs…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 22, 2026201-500331 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 22, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 22, 2026201-500313 contacts →

Exact match

“Octopus Investments, part of the Octopus Group, is an investment company investing in the people, ideas and industries that will change the world.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 22, 2026201-500301 contacts →

Exact match

“EPIC Investment Partners is an independent investment, administration and advisory firm.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 22, 2026201-500270 contacts →

Exact match

“Ashmore is one of the world's leading investment managers dedicated to Emerging Markets.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 22, 202651-200244 contacts →

Exact match

“Fisher Investments UK is a private investment advice and management company, offering the discretionary investment management services of our US-based parent company, Fisher…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 22, 2026201-500227 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 22, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 22, 202610001+221 contacts →

Exact match

“The international subsidiaries of Kotak manage a wide range of India investment funds through which overseas investors can invest in India.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 22, 2026201-500216 contacts →

Exact match

“Artemis is a leading UK–based fund manager, offering a range of funds which invest in the UK, Europe, the USA and around the world.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 22, 202651-200214 contacts →

Exact match

“Liontrust is a specialist active asset manager that was founded in 1995 and listed on the London Stock Exchange in Liontrust believes active management and the power of investment…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 22, 202651-200210 contacts →

Exact match

“Polar Capital Holdings plc is a specialist investment management company offering professional and institutional investors a range of geographical and sector funds.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 22, 202651-200192 contacts →

Exact match

“Cheyne Capital is a London-based alternative investment fund manager which was founded in by Jonathan Lourie (CEO & CIO) and Stuart Fiertz (President) after working together at…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 22, 20265,001-10,000191 contacts →

Exact match

“T.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 22, 202651-200188 contacts →

Exact match

“Redwheel is a specialist, independent investment organisation.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 22, 202651-200170 contacts →

Exact match

“High conviction, active investors J O Hambro Capital Management (JOHCM) is an active investment company with an investment performance-led ethos.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Sep 22, 202651-200148 contacts →

Exact match

“Mondrian Investment Partners Limited is an independent, employee-owned, international, value-oriented investment manager with offices in London, Philadelphia and Singapore.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 22, 202651-200141 contacts →

Exact match

“Lightrock is a global investment platform supporting the growth of technology-enabled companies.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 22, 202651-20098 contacts →

Exact match

“Cain International ('Cain') is a privately held investment firm focused on real estate and business opportunities that shape the fabric of global gateway cities.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

Showing 25 of 479 thematic investment managers based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 12,201 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Thematic investment managers based in the United Kingdom at a glance

As of Sep 22, 2026
46.1%Verified-email coverage
55.3Average contacts per company
11-50Median size (employees)
75.2%Largest-city concentration · London
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
211
11-50
172
51-200
47
201-500
23
501-1,000
7
1,001-5,000
13
5,001-10,000
3
10001+
1

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 479 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 “thematic investment managers” 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 12,201 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 22, 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 “thematic investment managers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many thematic investment managers are there based in the United Kingdom?

RevenueBase identified 479 company matches for thematic investment managers 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?

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

Which city has the most thematic investment managers?

London leads with 360 company records, followed by Edinburgh (10) and City Of London (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 12,201 professional contacts with verified work emails tracked across these 479 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 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 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.