Company lists · Data refreshed September 2026

Top 25 Green energy investment firms based in London, United Kingdom

Name: Green energy 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 322 companies tracked

RevenueBase identified 322 green energy investment firms headquartered in London, United Kingdom as of September 2026 and tracks 6,964 professional contacts across them, including 2,581 with verified work emails and 505 with mobile numbers. Across the United Kingdom, London is the largest hub for this category.

This list covers green energy 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

322Companies

6,964Contacts tracked

2,581Verified emails

505Mobile numbers

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The 25 largest green energy investment firms based in London, United Kingdom

Ranked by team size

Top 25 of 322 green energy 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 green energy 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	Lightsource BP	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	1,001-5,000	1,114 contacts →
	Partial evidence “Lightsource bp is working to support a future powered by renewable, affordable and reliable energy that benefits our partners, people and planet.” Source: RevenueBase Database · checked Sep 12, 2026
2	Sonnedix	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	501-1,000	563 contacts →
	Partial evidence “Sonnedix is a global renewable energy company delivering 100% clean electricity directly to customers through a diversified portfolio of solar, wind, and storage assets.” Source: RevenueBase Database · checked Sep 12, 2026
3	Cubico Sustainable Investments	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	501-1,000	406 contacts →
	Strong evidence “Cubico Sustainable Investments is one of the world’s largest privately-owned renewable energy companies, leveraging our strong local presence with a unique combination of in-house…” Source: RevenueBase Database · checked Sep 12, 2026
4	LOW Carbon	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	195 contacts →
	Partial evidence “Low Carbon creates renewable energy to fight climate change.” Source: RevenueBase Database · checked Sep 12, 2026
5	Octopus Energy Generation	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	153 contacts →
	Strong evidence “At Octopus Energy Generation, we’re building green power for the future, from large-scale solar to onshore and offshore wind, and innovative initiatives like the Fan Club.” Source: RevenueBase Database · checked Sep 12, 2026
6	Schroders Greencoat LLP	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	119 contacts →
	Partial 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
7	Nextenergy Capital	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	201-500	83 contacts →
	Partial evidence “NextEnergy Capital was founded in 2007 to become the leading specialist investment and asset manager in the solar sector.” Source: RevenueBase Database · checked Sep 12, 2026
8	Innova	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	77 contacts →
	Partial evidence “Innova is a forward-thinking renewable energy business, employing people across two offices in London and Cheltenham.” Source: RevenueBase Database · checked Sep 12, 2026
9	Sustainable Development Capital, LLP Sdcl	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	74 contacts →
	Partial 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
10	Nexta Capital Partners	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	65 contacts →
	Indirect evidence “Nexta Capital Partners is a holding company which originates, develops, finances builds and operates renewable infrastructure assets.” Source: RevenueBase Database · checked Sep 12, 2026
11	Climate Investment CI	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	62 contacts →
	Partial evidence “Climate Investment is a US and UK-based independently managed specialist investor focused on accelerating capital-efficient decarbonization of heavy emitting sectors.” Source: RevenueBase Database · checked Sep 12, 2026
12	Just Climate	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	56 contacts →
	Partial evidence “Established by Generation Investment Management, Just Climate is a specialist investment business focused on scaling solutions for the highest-emitting, most off-track sectors of…” Source: RevenueBase Database · checked Sep 12, 2026
13	Renewable Power Capital	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	51 contacts →
	Partial evidence “We invest in the development, construction, and long-term ownership of solar, onshore wind and battery storage projects, enabling the energy transition and driving stable…” Source: RevenueBase Database · checked Sep 12, 2026
14	Elements Green	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	51 contacts →
	Strong evidence “Elements Green (EG) is a leading renewable energy developer headquartered in London, specialising in utility-scale solar PV systems and battery energy storage solutions.” Source: RevenueBase Database · checked Sep 12, 2026
15	Ecofin	Indirect evidence	London, United KingdomHQ checked Sep 12, 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 12, 2026
16	ARC Power	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	48 contacts →
	Partial evidence “ARC Power is at the forefront of renewable energy innovation in Africa, dedicated to transforming lives through energy access in underserved regions.” Source: RevenueBase Database · checked Sep 12, 2026
17	Bluefield Partners LLP	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	47 contacts →
	Indirect evidence “Founded in 2009, Bluefield Partners LLP is a European renewables specialist, investing across the full lifecycle of greenfield and brownfield opportunities in solar, wind, and…” Source: RevenueBase Database · checked Sep 12, 2026
18	Gore Street Capital	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	46 contacts →
	Partial evidence “Gore Street Capital was formed in 2015 as a global platform to acquire and manage renewable energy assets.” Source: RevenueBase Database · checked Sep 12, 2026
19	Augusta & CO	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	44 contacts →
	Partial evidence “Augusta is a London-based specialist financial advisory firm serving the renewables and energy transition sector.” Source: RevenueBase Database · checked Sep 12, 2026
20	National Energy	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	41 contacts →
	Partial evidence “Founded in 2018 by ambitious entrepreneurs, National Energy is a US-backed, privately funded group active globally across the renewable energy sector.” Source: RevenueBase Database · checked Sep 12, 2026
21	Bluewater	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	39 contacts →
	Partial evidence “Bluewater is a specialist international private equity firm focused on the middle-market energy sector.” Source: RevenueBase Database · checked Sep 12, 2026
22	Zouk Capital LLP	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	39 contacts →
	Indirect evidence “Zouk Capital is a fund manager focused on the opportunities emerging at the intersection of infrastructure, technology and sustainability.” Source: RevenueBase Database · checked Sep 12, 2026
23	Natpower UK	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	38 contacts →
	Partial evidence “NatPower UK has the largest clean energy development programme in the UK, aiming at integrating large scale smart clean energy generation and distribution with large scale…” Source: RevenueBase Database · checked Sep 12, 2026
24	Akereos Capital	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	37 contacts →
	Strong evidence “AKEREOS CAPITAL Akereos is an investment banking firm solely focused on the Energy Transition.” Source: RevenueBase Database · checked Sep 12, 2026
25	Covalis Capital	Partial evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	37 contacts →
	Partial evidence “Covalis Capital is a global asset manager focused on infrastructure, utilities, renewable energy, industrials and materials sectors.” 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: green energy 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 green energy investment firms.
Partial evidence: Its own public description names part of green energy investment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name green energy 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 322 green energy investment firms based in London, United Kingdom

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Green energy investment firms based in London, United Kingdom at a glance

As of Sep 12, 2026

37.1%Verified-email coverage

7.3%Mobile-number coverage

21.6Average contacts per company

1-10Median size (employees)

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

181

11-50

106

51-200

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

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

Email last verified

Median 14.0d

2,1830–30

37031–60

1861–90

190–180

9180+

Company record updated

Median 63.0d

00–30

3,36031–60

2,59061–90

62190–180

393180+

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 green energy 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 “green energy 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 green energy 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 green energy 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, 2,581 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 green energy 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 green energy investment firms are there based in London, United Kingdom?

RevenueBase identified 322 green energy 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?

Lightsource BP, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most green energy investment firms?

London leads the United Kingdom with 333 headquartered companies, followed by Edinburgh (12) and Glasgow (9).

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 2,581 verified decision-maker contacts tracked across these 322 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.