Company lists · Data refreshed September 2026

Top 25 Hydroelectric power investment firms based in the United Kingdom

Name: Hydroelectric power 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 28, 2026 237 companies tracked

RevenueBase identified 237 hydroelectric power investment firms headquartered in the United Kingdom as of September 2026 and tracks 13,561 professional contacts across them, including 4,986 with verified work emails. London is the largest hub.

This list covers hydroelectric power 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 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 28, 2026 86% judged on-target in blind review

237Companies

13,561Contacts tracked

4,986Verified emails

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The 25 largest hydroelectric power investment firms based in the United Kingdom

Ranked by team size

Top 25 of 237 hydroelectric power investment firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to hydroelectric power 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	RES	Indirect evidence	Kings Langley, United KingdomHQ checked Sep 28, 2026	1,001-5,000	3,721 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 28, 2026
2	SSE Renewables	Indirect evidence	Perth, United KingdomHQ checked Sep 28, 2026	1,001-5,000	1,900 contacts →
	Indirect evidence “SSE Renewables is a leading developer and operator of renewable energy generation, headquartered in the UK and Ireland, with a growing presence internationally.” Source: RevenueBase Database · checked Sep 28, 2026
3	Lightsource BP	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	1,114 contacts →
	Indirect 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 28, 2026
4	Sonnedix	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	563 contacts →
	Indirect 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 28, 2026
5	Atlantica Sustainable Infrastructure PLC	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1,001-5,000	503 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 28, 2026
6	ACTIS	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	493 contacts →
	Indirect evidence “Actis is a leading growth market investor in sustainable infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026
7	Cubico Sustainable Investments	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	406 contacts →
	Partial 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 28, 2026
8	Ethical Power	Partial evidence	Exeter, United KingdomHQ checked Sep 28, 2026	51-200	231 contacts →
	Partial evidence “Ethical Power Group launched in the UK in 2010.” Source: RevenueBase Database · checked Sep 28, 2026
9	Octopus Energy Generation	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	153 contacts →
	Partial 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 28, 2026
10	British Solar Renewables	Indirect evidence	Shepton Mallet, United KingdomHQ checked Sep 28, 2026	51-200	148 contacts →
	Indirect evidence “Clean energy, powered with purpose.” Source: RevenueBase Database · checked Sep 28, 2026
11	Statera Energy	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	142 contacts →
	Indirect evidence “Statera Energy is a UK-based energy company that develops, owns, and operates flexible generation, battery storage, pumped hydro and green hydrogen projects.” Source: RevenueBase Database · checked Sep 28, 2026
12	Schroders Greencoat LLP	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
13	Innogy Renewables UK	Indirect evidence	Swindon, United KingdomHQ checked Sep 28, 2026	501-1,000	94 contacts →
	Indirect evidence “Innogy Renewables UK Ltd is a leading business in the drive to generate more electricity from low carbon, inexhaustable domestic energy sources.” Source: RevenueBase Database · checked Sep 28, 2026
14	Private Energy Partners	Partial evidence	Swindon, United KingdomHQ checked Sep 28, 2026	51-200	84 contacts →
	Partial evidence “Private Energy Partners (PEP) is an affiliate of Quinbrook, a specialist investment manager focused exclusively on the infrastructure needed to drive the energy and digital…” Source: RevenueBase Database · checked Sep 28, 2026
15	Nextenergy Capital	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
16	Highview	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	79 contacts →
	Indirect evidence “Highview is a leading energy infrastructure business.” Source: RevenueBase Database · checked Sep 28, 2026
17	Icon Infrastructure LLP	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
18	Sustainable Development Capital, LLP Sdcl	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
19	RED Rock Renewables	Indirect evidence	Edinburgh, United KingdomHQ checked Sep 28, 2026	51-200	65 contacts →
	Indirect evidence “Red Rock Renewables is an investor, owner, operator and developer of renewable energy projects.” Source: RevenueBase Database · checked Sep 28, 2026
20	Nexta Capital Partners	Indirect evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
21	Drax Group UK	Partial evidence	North Yorkshire, United KingdomHQ checked Sep 28, 2026	1,001-5,000	60 contacts →
	Partial evidence “Drax is enabling a zero carbon, lower cost energy future Drax Group is a renewable energy company engaged in renewable power generation, the production of sustainable biomass and…” Source: RevenueBase Database · checked Sep 28, 2026
22	Aura Power	Partial evidence	Bristol, United KingdomHQ checked Sep 28, 2026	11-50	58 contacts →
	Partial evidence “Aura Power is a renewable energy investor, developer and adviser.” Source: RevenueBase Database · checked Sep 28, 2026
23	Transmission Investment	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
24	Northumberland Estates	Partial evidence	Alnwick, United KingdomHQ checked Sep 28, 2026	51-200	53 contacts →
	Partial evidence “Northumberland Estates, based in the North East, is a development and investment company with a diverse portfolio encompassing residential and commercial properties, farming…” Source: RevenueBase Database · checked Sep 28, 2026
25	Renewable Power Capital	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	51 contacts →
	Indirect 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 28, 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: hydroelectric power 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 hydroelectric power investment firms.
Partial evidence: Its own public description names part of hydroelectric power investment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydroelectric power 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 237 hydroelectric power investment firms based in the United Kingdom

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Hydroelectric power investment firms based in the United Kingdom at a glance

As of Sep 28, 2026

36.8%Verified-email coverage

57.2Average contacts per company

11-50Median size (employees)

61.2%Largest-city concentration · London

Sep 28, 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

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 237 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 hydroelectric power 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 the United Kingdom whose own description of what they do matches “hydroelectric power 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 hydroelectric power 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 hydroelectric power 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 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, 4,986 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 28, 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.

Hydroelectric power investment firms by metro

Hydroelectric power investment firms in London145

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 hydroelectric power 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 hydroelectric power investment firms are there based in the United Kingdom?

RevenueBase identified 237 hydroelectric power 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?

RES, headquartered in Kings Langley, tops this list with the largest team on record.

Which city has the most hydroelectric power investment firms?

London leads with 145 headquartered companies, followed by Edinburgh (9) and Bristol (4).

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 4,986 verified decision-maker contacts tracked across these 237 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 28, 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.