Company lists · Data refreshed September 2026

Top 25 Infrastructure investment firms based in London, United Kingdom

Name: Infrastructure 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 12, 2026 208 companies tracked

RevenueBase identified 208 infrastructure investment firms headquartered in London, United Kingdom as of September 2026 and tracks 21,727 professional contacts across them, including 7,573 with verified work emails and 1,048 with mobile numbers. Across the United Kingdom, London is the largest hub for this category.

This list covers infrastructure investment firms headquartered in London, 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 12, 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 12, 2026 86% judged on-target in blind review

208Companies

21,727Contacts tracked

7,573Verified emails

1,048Mobile numbers

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

Ranked by team size

Top 25 of 208 infrastructure investment firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 12, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure 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	Balfour Beatty PLC	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	10001+	10,507 contacts →
	Partial evidence “Balfour Beatty is a leading international infrastructure group.” Source: RevenueBase Database · checked Sep 12, 2026
2	ACTIS	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	493 contacts →
	Partial evidence “Actis is a leading growth market investor in sustainable infrastructure.” Source: RevenueBase Database · checked Sep 12, 2026
3	3i Group PLC	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	337 contacts →
	Strong evidence “3i is a leading international investment company with two complementary businesses, Private Equity and Infrastructure, specialising in core investment markets in northern Europe…” Source: RevenueBase Database · checked Sep 12, 2026
4	John Laing	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	230 contacts →
	Partial evidence “John Laing is a leading international investor and active manager of core infrastructure assets.” Source: RevenueBase Database · checked Sep 12, 2026
5	Equitix	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	223 contacts →
	Partial evidence “We are a responsible investor, investing in, developing and managing global infrastructure assets, which materially contribute to the lives of the communities they serve.” Source: RevenueBase Database · checked Sep 12, 2026
6	Infrared Capital Partners	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	197 contacts →
	Partial evidence “InfraRed is a leading international mid-market infrastructure asset manager.” Source: RevenueBase Database · checked Sep 12, 2026
7	Vitruvian Partners	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	187 contacts →
	Partial evidence “Vitruvian Partners is an international investment firm that supports the most ambitious and talented entrepreneurs and higher growth companies to achieve their goals.” Source: RevenueBase Database · checked Sep 12, 2026
8	Amber Infrastructure	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	171 contacts →
	Partial evidence “Amber is part of Boyd Watterson Global Asset Management Group LLC (‘Boyd’), a global diversified infrastructure, real estate and fixed income business with over $39bn in assets…” Source: RevenueBase Database · checked Sep 12, 2026
9	Schroders Greencoat LLP	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	119 contacts →
	Strong evidence “Schroders Greencoat is a specialist investment manager dedicated to renewable infrastructure, with over £8.5 billion under management.” Source: RevenueBase Database · checked Sep 12, 2026
10	Igneo Infrastructure Partners	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	117 contacts →
	Strong evidence “Sustainable Value Creation Through Partnership We seek to deliver sustainable returns through investment in mature, stable, infrastructure businesses.” Source: RevenueBase Database · checked Sep 12, 2026
11	The Private Infrastructure Development Group Pidg	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	107 contacts →
	Strong evidence “The Private Infrastructure Development Group (PIDG) mobilises private investment in infrastructure in frontier markets, accelerating climate action and sustainable development…” Source: RevenueBase Database · checked Sep 12, 2026
12	Metallon Corporation	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	1,001-5,000	104 contacts →
	Partial evidence “partners and invests in companies across the natural resources and infrastructure sectors.” Source: RevenueBase Database · checked Sep 12, 2026
13	Stafford Capital Partners	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	97 contacts →
	Partial evidence “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+…” Source: RevenueBase Database · checked Sep 12, 2026
14	Arcus Infrastructure Partners LLP	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	91 contacts →
	Partial evidence “Founded in 2009, Arcus is an independent infrastructure fund manager with a focus on the European mid-market.” Source: RevenueBase Database · checked Sep 12, 2026
15	Centrus	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	86 contacts →
	Indirect evidence “Real Assets.” Source: RevenueBase Database · checked Sep 12, 2026
16	Infrata, A DSS Company	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	85 contacts →
	Partial evidence “Infrata bridges the gap between infrastructure projects and investors.” Source: RevenueBase Database · checked Sep 12, 2026
17	Icon Infrastructure LLP	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	78 contacts →
	Partial evidence “iCON is an independent investment group with $12 billion in funds under management.” Source: RevenueBase Database · checked Sep 12, 2026
18	Sustainable Development Capital, LLP Sdcl	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	74 contacts →
	Strong 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 12, 2026
19	Transmission Investment	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	55 contacts →
	Partial evidence “Transmission Investment is a leading independent energy and utility investment and advisory business with ten years of history in developing, acquiring and managing electricity…” Source: RevenueBase Database · checked Sep 12, 2026
20	AGC Equity Partners	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	52 contacts →
	Partial evidence “AGC Equity Partners is a global alternative asset investment firm operating from offices in London and the Middle East.” Source: RevenueBase Database · checked Sep 12, 2026
21	Ancala	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	51 contacts →
	Strong evidence “Ancala is a leading independent and award-winning infrastructure manager that delivers infrastructure investment differently.” Source: RevenueBase Database · checked Sep 12, 2026
22	Infracapital	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	50 contacts →
	Strong evidence “Infracapital invests in, builds and manages a diverse range of essential infrastructure to meet the changing needs of society and deliver the significant investment required to…” Source: RevenueBase Database · checked Sep 12, 2026
23	Arjun Infrastructure Partners	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	48 contacts →
	Partial evidence “Arjun Infrastructure Partners is an independent European infrastructure fund manager with €7.6bn AUM.” Source: RevenueBase Database · checked Sep 12, 2026
24	Basalt Infrastructure Partners	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	47 contacts →
	Strong evidence “Basalt is a dedicated mid-market infrastructure equity investment firm focusing on investments in power & renewables, utilities, transport and communications & digital…” Source: RevenueBase Database · checked Sep 12, 2026
25	Amberside Advisors	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	44 contacts →
	Partial evidence “Amberside Advisors is an independent consultancy providing financial and commercial advice to low carbon energy, infrastructure and public sector projects.” Source: RevenueBase Database · checked Sep 12, 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: infrastructure 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 infrastructure investment firms.
Partial evidence: Its own public description names part of infrastructure investment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure 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 208 infrastructure investment firms based in London, United Kingdom

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

As of Sep 12, 2026

34.9%Verified-email coverage

4.8%Mobile-number coverage

104.5Average contacts per company

11-50Median size (employees)

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Freshness & accuracy

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

Email last verified

Median 15.0d

6,4350–30

1,08231–60

2761–90

690–180

23180+

Company record updated

Median 77.0d

00–30

7,06931–60

11,12161–90

2,61490–180

923180+

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 infrastructure 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 London, United Kingdom whose own description of what they do matches “infrastructure 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 infrastructure 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 infrastructure investment firms, and records with no verified work email. Companies headquartered outside London 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, 7,573 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 12, 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.

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 infrastructure 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 infrastructure investment firms are there based in London, United Kingdom?

RevenueBase identified 208 infrastructure investment firms headquartered in London, 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?

Balfour Beatty PLC, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most infrastructure investment firms?

London leads the United Kingdom with 156 headquartered companies, followed by Leeds (4) and Belfast (2).

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 7,573 verified decision-maker contacts tracked across these 208 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 12, 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.