Company lists · Data refreshed September 2026
Top 21 Renewable energy investment firms based in Spain
RevenueBase identified 446 renewable energy investment firms headquartered in Spain as of September 2026 and tracks 14,927 professional contacts across them, including 2,536 with verified work emails and 515 with mobile numbers. Madrid is the largest hub.
This list covers renewable energy investment firms headquartered in Spain, 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.
The 21 largest renewable energy investment firms based in Spain
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | ZelestraIndirect evidence | 929 | |||
“At Zelestra, we are on a mission to change the world by making decarbonization a reality for our partners.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | GrenergyPartial evidence | 699 | |||
“The on-demand energy producer empowering ever-changing lives Grenergy is a Spanish multinational clean energy producer.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 533 | ||||
“We are a vertically integrated energy company and offer tailored solutions for large consumers and for new energy demands, such as data centers.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | X-ElioStrong evidence | 466 | |||
“X-ELIO: global leader in the development of renewable energy projects.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | Fotowatio Renewable Ventures FRVStrong evidence | 339 | |||
“We are world leaders in providing comprehensive renewable energy solutions.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | Solaria Energía Y Medio AmbientePartial evidence | 305 | |||
“Solaria Energía y Medio Ambiente is a company dedicated to selling carbon free energy generated by its solar plants.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | OpdenergyIndirect evidence | 230 | |||
“Opdenergy is an Independent Power Producer (IPP) with more than 20 years of experience, operating in Europe, the United States, and Latin America.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | RIC Energy GroupStrong evidence | 216 | |||
“At RIC Energy, we aspire to change the trajectory of renewable energy and energy efficiency.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | ID Energy GroupStrong evidence | 210 | |||
“ID Energy Group is an international corporate group that is dedicated to renewable energy and specialised in solar photovoltaic energy.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 205 | ||||
“Enerside is a fast-growing, fully integrated solar photovoltaic platform with a global presence and headquarters in Barcelona, Spain.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 193 | ||||
“Exus Renewables Europe is an Energy Solutions Provider active across the full energy value chain, from development and construction to ownership, operations, and third-party asset…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 189 | ||||
“With more than 200 employees and a growing workforce, Elawan Energy provides integrated solutions across the clean energy lifecycle, from the promotion, development, and…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 175 | ||||
“Greening is a global, vertically integrated renewable energy company that not only generates and markets its own green energy, but does so through a diversified portfolio of…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 151 | ||||
“CANSOL ENERGY SOLUTIONS, construyendo un futuro sostenible.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 147 | ||||
“Matrix Renewables is a global renewable energy platform created and backed by global alternative asset manager TPG and its $31 billion impact-investing platform.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 131 | ||||
“BNZ is an independent power producer (IPP) that develops, builds, and operates renewable energy projects in Europe, particularly in Portugal, Italy, and Spain.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 128 | ||||
“Ecoener es una multinacional española especializada en energía renovables, con 37 años de experiencia en el desarrollo de proyectos que buscan una perfecta integración ambiental y…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | Plenium PartnersPartial evidence | 124 | |||
“Founded in 2007, Plenium Partners is an investment company focused on power and sustainable infrastructure in Europe More than 7.5Bn invested to date,+300 employees, 5 countries…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 95 | ||||
“RÍOS Renovables Group es un grupo empresarial consolidado en el mercado de las energías renovables.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | Grupo ZaragozáIndirect evidence | 88 | |||
“We have history, we’re present, creating future” Zaragozá Group is a group that has grown and adapted to the business opportunities that have arisen.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 87 | ||||
“Greenalia is an independent renewable energy producer.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 21 of 446 renewable energy investment firms based in Spain
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Renewable energy investment firms based in Spain at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 Spain 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 Spain 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, 2,536 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 Madrid132
Frequently asked
How many renewable energy investment firms are there based in Spain?
RevenueBase identified 446 renewable energy investment firms headquartered in Spain 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?
Zelestra, headquartered in Spain, tops this list with the largest team on record.
Which city has the most renewable energy investment firms?
Madrid leads with 132 headquartered companies, followed by Barcelona (23) and Sevilla (21).
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 2,536 verified decision-maker contacts tracked across these 446 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.
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