Company lists · Data refreshed September 2026

Top 25 Renewable energy investment firms based in the United Kingdom

Name: Renewable energy investment firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 814 companies tracked

RevenueBase identified 814 renewable energy investment firms headquartered in the United Kingdom as of September 2026 and tracks 39,827 professional contacts across them, including 14,405 with verified work emails and 2,339 with mobile numbers. London is the largest hub.

This list covers renewable energy investment firms 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

814Companies

39,827Contacts tracked

14,405Verified emails

2,339Mobile numbers

Explore all 814 companies → Free signup · no credit card · 500 free credits

The 25 largest renewable energy investment firms based in the United Kingdom

Ranked by team size

Top 25 of 814 renewable energy investment firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names renewable energy investment firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	EDF UKPartial evidence	London, United KingdomHQ checked Sep 5, 2026	10001+	8,188
	“EDF is leading the charge towards An Electric Britain to help make energy more affordable and sustainable.” Source: company website · checked Sep 5, 2026
2	ScottishpowerPartial evidence	Glasgow, United KingdomHQ checked Sep 5, 2026	5,001-10,000	4,127
	“Transforming the UK’s energy system, from power to plug.” Source: company website · checked Sep 5, 2026
3	Octopus EnergyPartial evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	3,989
	“We're on a mission to make a big green dent in the universe by building a truly sustainable energy system globally.” Source: company website · checked Sep 5, 2026
4	RESStrong evidence	Kings Langley, United KingdomHQ checked Sep 5, 2026	1,001-5,000	3,721
	“RES is the world’s largest independent renewable energy company, working across 24 countries and active in wind, solar, energy storage, green hydrogen, transmission, and…” Source: company website · checked Sep 5, 2026
5	SSE RenewablesStrong evidence	Perth, United KingdomHQ checked Sep 5, 2026	1,001-5,000	1,900
	“SSE Renewables is a leading developer and operator of renewable energy generation, headquartered in the UK and Ireland, with a growing presence internationally.” Source: company website · checked Sep 5, 2026
6	Lightsource BPStrong evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	1,114
	“Lightsource bp is working to support a future powered by renewable, affordable and reliable energy that benefits our partners, people and planet.” Source: company website · checked Sep 5, 2026
7	SMS PLCPartial evidence	Glasgow, United KingdomHQ checked Sep 5, 2026	1,001-5,000	766
	“Through our range of innovative energy solutions, we are delivering the future of smart energy – working closely with private and public sector partners to decarbonise the UK…” Source: company website · checked Sep 5, 2026
8	NadaraStrong evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	629
	“We’re Nadara, one of Europe’s largest renewable energy independent power producers.” Source: company website · checked Sep 5, 2026
9	SonnedixStrong evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	563
	“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: company website · checked Sep 5, 2026
10	Atlantica Sustainable Infrastructure PLCStrong evidence	London, United KingdomHQ checked Sep 5, 2026	1,001-5,000	503
	“Atlantica is a sustainable infrastructure company that owns, manages, develops, builds and invests in renewable energy, storage, efficient natural gas and heat, transmission lines…” Source: company website · checked Sep 5, 2026
11	Natural PowerStrong evidence	Castle Douglas, United KingdomHQ checked Sep 5, 2026	501-1,000	500
	“Natural Power is a leading independent consultancy and service provider for the renewable energy sector.” Source: company website · checked Sep 5, 2026
12	Cubico Sustainable InvestmentsStrong evidence	London, United KingdomHQ checked Sep 5, 2026	501-1,000	406
	“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: company website · checked Sep 5, 2026
13	SO EnergyPartial evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	378
	“We do energy, you do you.” Source: company website · checked Sep 5, 2026
14	ZenobēPartial evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	336
	“We're Zenobē Energy and we're on a mission to make clean power accessible.” Source: company website · checked Sep 5, 2026
15	InfinisIndirect evidence	Northampton, United KingdomHQ checked Sep 5, 2026	201-500	269
	“Infinis is the largest generator of power from landfill gas in the UK.” Source: company website · checked Sep 5, 2026
16	Ethical PowerIndirect evidence	Exeter, United KingdomHQ checked Sep 5, 2026	51-200	231
	“Ethical Power Group launched in the UK in 2010.” Source: company website · checked Sep 5, 2026
17	Anesco LTDStrong evidence	Aldermaston Nr Reading, United KingdomHQ checked Sep 5, 2026	201-500	216
	“Anesco is a market leader in renewable energy and energy efficiency.” Source: company website · checked Sep 5, 2026
18	VPIIndirect evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	214
	“With a capacity of 3.5GW, we are one of the leading power companies in the UK and Ireland.” Source: company website · checked Sep 5, 2026
19	LOW CarbonStrong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	195
	“Low Carbon creates renewable energy to fight climate change.” Source: company website · checked Sep 5, 2026
20	OWCStrong evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	185
	“The Renewable Energy Consultants.” Source: company website · checked Sep 5, 2026
21	Octopus Energy GenerationPartial evidence	London, United KingdomHQ checked Sep 5, 2026	201-500	153
	“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: company website · checked Sep 5, 2026
22	British Solar RenewablesPartial evidence	Shepton Mallet, United KingdomHQ checked Sep 5, 2026	51-200	148
	“Clean energy, powered with purpose.” Source: company website · checked Sep 5, 2026
23	Cero GenerationPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	145
	“We’re focused on developing and delivering utility-scale solar and battery energy storage system (BESS) projects that power the transition to a cleaner, more resilient energy…” Source: company website · checked Sep 5, 2026
24	Statera EnergyPartial evidence	London, United KingdomHQ checked Sep 5, 2026	51-200	142
	“Statera Energy is a UK-based energy company that develops, owns, and operates flexible generation, battery storage, pumped hydro and green hydrogen projects.” Source: company website · checked Sep 5, 2026
25	Bryt EnergyPartial evidence	Birmingham, United KingdomHQ checked Sep 5, 2026	51-200	129
	“Part of the Statkraft group, we provide British businesses with zero carbon, 100% renewable electricity*, sourced solely from Solar, Wind and Hydro.” Source: company website · checked Sep 5, 2026

Showing 25 of 814 renewable energy investment firms based in the United Kingdom

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Renewable energy investment firms based in the United Kingdom at a glance

As of Sep 5, 2026

11-50Median size (employees)

LondonLargest hub · 326 HQs

2,339Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

403

11-50

278

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Verified emails by last verification

0–30

13,391

31–60

912

61–90

90–180

180+

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 renewable energy investment firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “renewable energy investment firms”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among renewable energy investment firms, 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 an evidence 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, 14,405 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 5, 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.

Renewable energy investment firms by metro

Renewable energy investment firms in London326

Frequently asked

How many renewable energy investment firms are there based in the United Kingdom?

RevenueBase identified 814 renewable energy investment firms 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?

EDF UK, headquartered in London, tops this list with the largest team on record.

Which city has the most renewable energy investment firms?

London leads with 326 headquartered companies, followed by Edinburgh (15) and Glasgow (15).

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 14,405 verified decision-maker contacts tracked across these 814 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 5, 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.