Company lists · Data refreshed September 2026

Top 25 Clean energy investment firms worldwide

Name: Clean energy investment firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 6,572 companies tracked

RevenueBase identified 6,572 clean energy investment firms worldwide as of September 2026 and tracks 174,103 professional contacts across them, including 57,408 with verified work emails. The United States is the largest market and London the largest hub.

This list covers clean energy investment firms worldwide, 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 27, 2026. Country and city lists for clean energy investment firms follow the table.

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 27, 2026 86% judged on-target in blind review

6,572Companies

174,103Contacts tracked

57,408Verified emails

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The 25 largest clean energy investment firms worldwide

Ranked by team size

Top 25 of 6,572 clean energy investment firms worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to clean 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	Subsea7	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	10001+	12,645 contacts →
	Partial evidence “Subsea7 makes offshore energy transition possible through the continuous evolution of lower-carbon oil and gas and by enabling the growth of renewables and emerging energy.” Source: RevenueBase Database · checked Sep 27, 2026
2	RWE	Partial evidence	Essen, GermanyHQ checked Sep 27, 2026	10001+	11,181 contacts →
	Partial evidence “RWE is leading the way to a modern energy world.” Source: RevenueBase Database · checked Sep 27, 2026
3	SSE PLC	Strong evidence	Perth, United KingdomHQ checked Sep 27, 2026	10001+	6,505 contacts →
	Strong evidence “The UK & Ireland's clean energy champion.” Source: RevenueBase Database · checked Sep 27, 2026
4	EDP	Indirect evidence	Lisbon, PortugalHQ checked Sep 27, 2026	10001+	6,435 contacts →
	Indirect evidence “Our story began 50 years ago.” Source: RevenueBase Database · checked Sep 27, 2026
5	Enel Green Power	Partial evidence	Roma, ItalyHQ checked Sep 27, 2026	5,001-10,000	5,251 contacts →
	Partial evidence “We are the Enel Group company dedicated to the development and management of renewable energy generation worldwide.” Source: RevenueBase Database · checked Sep 27, 2026
6	RENEW	Strong evidence	Gurugram, IndiaHQ checked Sep 27, 2026	1,001-5,000	4,340 contacts →
	Strong evidence “ReNew is a leading decarbonisation solutions provider and the first Indian clean energy company to list on Nasdaq (Nasdaq: RNW).” Source: RevenueBase Database · checked Sep 27, 2026
7	RES	Partial evidence	Kings Langley, United KingdomHQ checked Sep 27, 2026	1,001-5,000	3,721 contacts →
	Partial 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 27, 2026
8	Adani Green Energy LTD	Strong evidence	United StatesHQ checked Sep 27, 2026	1,001-5,000	3,017 contacts →
	Strong evidence “Adani Green Energy Limited (AGEL) is India’s largest renewable energy company playing a vital role in enabling the clean energy transition.” Source: RevenueBase Database · checked Sep 27, 2026
9	Greenko Group	Partial evidence	Hyderabad, IndiaHQ checked Sep 27, 2026	1,001-5,000	2,578 contacts →
	Partial evidence “Greenko, is one of the World’s leading Energy Transition and Decarbonization solutions company, with an installed Renewable Energy capacity of ~7.5 GW across Wind, Solar and Hydro…” Source: RevenueBase Database · checked Sep 27, 2026
10	Acme Group	Partial evidence	Gurgaon, IndiaHQ checked Sep 27, 2026	1,001-5,000	2,242 contacts →
	Partial evidence “ACME Group is one of the leading global sustainable and renewable energy companies and a beacon of innovation in the sustainable energy landscape for the past 2 decades.” Source: RevenueBase Database · checked Sep 27, 2026
11	Envision Energy	Partial evidence	Huangpu District, ChinaHQ checked Sep 27, 2026	1,001-5,000	1,961 contacts →
	Partial evidence “Envision Energy is a world-leading green technology company that provides renewable energy solutions for global enterprises, governments, and institutions.” Source: RevenueBase Database · checked Sep 27, 2026
12	Avaada Group	Strong evidence	Mumbai, IndiaHQ checked Sep 27, 2026	5,001-10,000	1,747 contacts →
	Strong evidence “Avaada Group is a diversified clean energy conglomerate focused on the global energy transition, providing solutions in renewable power generation, solar PV manufacturing, green…” Source: RevenueBase Database · checked Sep 27, 2026
13	Energy Development Corporation	Strong evidence	Pasig City, PhilippinesHQ checked Sep 27, 2026	1,001-5,000	1,719 contacts →
	Strong evidence “The Energy Development Corporation (EDC) is a pioneer in generating 100% clean, renewable, and reliable power as an electricity supplier in the Philippines for over 40 years.” Source: RevenueBase Database · checked Sep 27, 2026
14	Voltalia	Partial evidence	Paris, FranceHQ checked Sep 27, 2026	1,001-5,000	1,436 contacts →
	Partial evidence “Voltalia is an international player in renewable energies.” Source: RevenueBase Database · checked Sep 27, 2026
15	Powur, PBC	Strong evidence	San Diego, United StatesHQ checked Sep 27, 2026	n/a	1,199 contacts →
	Strong evidence “The Powur Mission: Accelerate the adoption of clean energy worldwide We're empowering our community of homeowners and advisors to thrive in the global shift to sustainable energy.” Source: RevenueBase Database · checked Sep 27, 2026
16	Brookfield Renewable	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 27, 2026	1,001-5,000	1,163 contacts →
	Indirect evidence “Brookfield Renewable, as one of the core businesses under Brookfield Corporation, is one of the world’s largest owners, operators, and developers of renewable power, with $145…” Source: RevenueBase Database · checked Sep 27, 2026
17	Lightsource BP	Partial evidence	London, United KingdomHQ checked Sep 27, 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 27, 2026
18	Scatec ASA	Strong evidence	Oslo, NorwayHQ checked Sep 27, 2026	501-1,000	1,099 contacts →
	Strong evidence “Scatec is a leading renewable energy solutions provider, accelerating access to reliable and affordable clean energy in emerging markets.” Source: RevenueBase Database · checked Sep 27, 2026
19	Contourglobal	Partial evidence	Milan, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,047 contacts →
	Partial evidence “At ContourGlobal, our mission is clear: to be a globally recognized producer of renewable energy, delivering affordable, reliable, and sustainable electricity.” Source: RevenueBase Database · checked Sep 27, 2026
20	Masdar ABU Dhabi Future Energy Company	Strong evidence	Abu Dhabi, United Arab EmiratesHQ checked Sep 27, 2026	501-1,000	1,026 contacts →
	Strong evidence “Established in 2006, Masdar is a global clean energy leader, transforming how the world produces and consumes energy through bold innovation and commercial excellence.” Source: RevenueBase Database · checked Sep 27, 2026
21	CTG Brasil	Partial evidence	Sao Paulo, BrazilHQ checked Sep 27, 2026	501-1,000	988 contacts →
	Partial evidence “Na CTG Brasil, trabalhamos por um único propósito: desenvolver o mundo com energia limpa em larga escala.” Source: RevenueBase Database · checked Sep 27, 2026
22	Zelestra	Indirect evidence	SpainHQ checked Sep 27, 2026	501-1,000	929 contacts →
	Indirect evidence “At Zelestra, we are on a mission to change the world by making decarbonization a reality for our partners.” Source: RevenueBase Database · checked Sep 27, 2026
23	Boralex INC	Partial evidence	Kingsey Falls, QC, CanadaHQ checked Sep 27, 2026	501-1,000	801 contacts →
	Partial evidence “At Boralex, we have been providing affordable renewable energy accessible to everyone for over 30 years.” Source: RevenueBase Database · checked Sep 27, 2026
24	ABO Energy	Partial evidence	Wiesbaden, GermanyHQ checked Sep 27, 2026	1,001-5,000	785 contacts →
	Partial evidence “Founded in 1996, ABO Energy (fomerly known as ABO Wind) is among Europe’s leading developers of renewable energy projects.” Source: RevenueBase Database · checked Sep 27, 2026
25	Juwi Group	Partial evidence	Wörrstadt, GermanyHQ checked Sep 27, 2026	1,001-5,000	785 contacts →
	Partial evidence “For 30 years, we have been one of the leading specialists in renewable energies, offering complete project development and other services related to the planning, construction…” Source: RevenueBase Database · checked Sep 27, 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: clean 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 clean energy investment firms.
Partial evidence: Its own public description names part of clean 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 clean 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 6,572 clean energy investment firms worldwide

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Clean energy investment firms worldwide at a glance

As of Sep 27, 2026

33.0%Verified-email coverage

26.5Average contacts per company

1-10Median size (employees)

4.4%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

3,426

11-50

2,117

51-200

653

201-500

187

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 clean 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.
Coverage: Every country. Country and city lists for clean energy investment firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “clean 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 clean 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 clean energy investment firms, and records with no verified work email.
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, 57,408 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 27, 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.

Clean energy investment firms by location

37 lists · largest first

Every Clean energy investment firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 clean 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 clean energy investment firms are there worldwide?

RevenueBase identified 6,572 clean energy investment firms worldwide 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?

Subsea7, headquartered in London, tops this list with the largest team on record.

Which country has the most clean energy investment firms?

The United States leads with 1,235 companies, followed by the United Kingdom (489) and India (332). Every clean energy investment firms list by country and city is linked on this page.

Which city has the most clean energy investment firms?

London leads with 290 headquartered companies, followed by New York (134) and Singapore (81).

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 57,408 verified decision-maker contacts tracked across these 6,572 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 27, 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.