Company lists · Data refreshed September 2026

Top 25 Thematic investment managers based in the United Kingdom

Name: Thematic investment managers 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 479 companies tracked

RevenueBase identified 479 thematic investment managers headquartered in 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 thematic investment managers 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

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 thematic investment managers 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 thematic investment managers: 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	Janus Henderson Investors	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	1,001-5,000	3,000 contacts →
	Partial evidence “At Janus Henderson, we are investors – we help clients define and achieve superior financial outcomes through differentiated insights, disciplined investments, and world-class…” Source: RevenueBase Database · checked Sep 22, 2026
2	M&g Investments	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	1,001-5,000	1,774 contacts →
	Strong evidence “M&G Investments is a global asset manager.” Source: RevenueBase Database · checked Sep 22, 2026
3	Baillie Gifford	Strong evidence	Edinburgh, United KingdomHQ checked Sep 22, 2026	1,001-5,000	1,549 contacts →
	Strong evidence “We are an independent investment manager founded over a century ago in Edinburgh, owned and run by 59 partners.” Source: RevenueBase Database · checked Sep 22, 2026
4	Aviva Investors	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	1,001-5,000	1,320 contacts →
	Indirect evidence “Welcome to Aviva Investors.” Source: RevenueBase Database · checked Sep 22, 2026
5	Jupiter Asset Management	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	501-1,000	942 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 22, 2026
6	Royal London Asset Management	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	619 contacts →
	Partial evidence “Content suitable for investment professionals only.” Source: RevenueBase Database · checked Sep 22, 2026
7	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
8	7im	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	403 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 22, 2026
9	Impax Asset Management	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	331 contacts →
	Partial 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
10	Octopus Investments	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	313 contacts →
	Partial evidence “Octopus Investments, part of the Octopus Group, is an investment company investing in the people, ideas and industries that will change the world.” Source: RevenueBase Database · checked Sep 22, 2026
11	Epic Investment Partners	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	301 contacts →
	Partial evidence “EPIC Investment Partners is an independent investment, administration and advisory firm.” Source: RevenueBase Database · checked Sep 22, 2026
12	Ashmore	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	270 contacts →
	Strong evidence “Ashmore is one of the world's leading investment managers dedicated to Emerging Markets.” Source: RevenueBase Database · checked Sep 22, 2026
13	Fisher Investments UK	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	244 contacts →
	Strong evidence “Fisher Investments UK is a private investment advice and management company, offering the discretionary investment management services of our US-based parent company, Fisher…” Source: RevenueBase Database · checked Sep 22, 2026
14	Gresham House	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	227 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 22, 2026
15	Kotak Mahindra UK LTD	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	10001+	221 contacts →
	Strong evidence “The international subsidiaries of Kotak manage a wide range of India investment funds through which overseas investors can invest in India.” Source: RevenueBase Database · checked Sep 22, 2026
16	Artemis Investment Management	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	216 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 22, 2026
17	Liontrust Asset Management PLC	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	214 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 22, 2026
18	Polar Capital	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	210 contacts →
	Strong evidence “Polar Capital Holdings plc is a specialist investment management company offering professional and institutional investors a range of geographical and sector funds.” Source: RevenueBase Database · checked Sep 22, 2026
19	Cheyne Capital	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	192 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 22, 2026
20	T. Rowe Price UK	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	5,001-10,000	191 contacts →
	Indirect evidence “T.” Source: RevenueBase Database · checked Sep 22, 2026
21	Redwheel	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	188 contacts →
	Partial evidence “Redwheel is a specialist, independent investment organisation.” Source: RevenueBase Database · checked Sep 22, 2026
22	J O Hambro Capital Management	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	170 contacts →
	Strong evidence “High conviction, active investors J O Hambro Capital Management (JOHCM) is an active investment company with an investment performance-led ethos.” Source: RevenueBase Database · checked Sep 22, 2026
23	Mondrian Investment Partners Limited	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	148 contacts →
	Strong evidence “Mondrian Investment Partners Limited is an independent, employee-owned, international, value-oriented investment manager with offices in London, Philadelphia and Singapore.” Source: RevenueBase Database · checked Sep 22, 2026
24	Lightrock	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	141 contacts →
	Partial evidence “Lightrock is a global investment platform supporting the growth of technology-enabled companies.” Source: RevenueBase Database · checked Sep 22, 2026
25	Cain International	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	98 contacts →
	Partial evidence “Cain International ('Cain') is a privately held investment firm focused on real estate and business opportunities that shape the fabric of global gateway cities.” 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: thematic investment managers. 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 thematic investment managers.
Partial evidence: Its own public description names part of thematic investment managers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name thematic investment managers. 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 479 thematic investment managers based in the United Kingdom

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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

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among thematic investment managers, 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 “thematic investment managers”. 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 thematic investment managers), 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 thematic investment managers, 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, 12,201 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.

Thematic investment managers by metro

Thematic investment managers in London360

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 thematic investment managers, 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 thematic investment managers are there based in the United Kingdom?

RevenueBase identified 479 thematic investment managers 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?

Janus Henderson Investors, headquartered in London, tops this list with the largest team on record.

Which city has the most thematic investment managers?

London leads with 360 headquartered companies, 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 the top results, verified emails and direct dials included. Upgrading unlocks all 12,201 verified decision-maker contacts tracked across these 479 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.