Company lists · Data refreshed August 2026

Top 24 Clean energy venture capital companies based in Spain

Name: Clean energy venture capital companies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Aug 31, 2026 56 companies tracked

There are 56 clean energy venture capital companies headquartered in Spain (RevenueBase, August 2026). RevenueBase tracks 1,699 professional contacts across them, including 283 with verified work emails and 80 with mobile numbers. Madrid is the largest hub.

This list covers clean energy venture capital companies 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 August 31, 2026.

56Companies

1,699Contacts tracked

283Verified emails

80Mobile numbers

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The 24 largest clean energy venture capital companies based in Spain

Ranked by team size

Top 24 of 56 clean energy venture capital companies based in Spain, ranked by team size, largest first. Data refreshed Aug 31, 2026. Evidence rates how directly each company's own description names clean energy venture capital companies: 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	Verified emails
1	Atlas Renewable EnergyStrong evidence “Atlas Renewable Energy delivers clean energy at scale.” Source: company website · checked Aug 31, 2026	Madrid, Spain	201-500	499	13
2	X-ElioPartial evidence “X-ELIO: global leader in the development of renewable energy projects.” Source: company website · checked Aug 31, 2026	Madrid, Spain	201-500	466	93
3	Matrix RenewablesPartial evidence “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 Aug 31, 2026	Madrid, Spain	51-200	146	69
4	SmartenergyIndirect evidence “We are a Swiss-based investment company.” Source: company website · checked Aug 31, 2026	Valencia, Spain	201-500	94	56
5	IngeniumPartial evidence “INGENIUM GROUP is an international energy group specialized in the development and investment in renewable energy projects, with a presence in Italy, Spain, and Germany.” Source: company website · checked Aug 31, 2026	Valencia, Spain	11-50	33	11
6	SYDISPartial evidence “is a company focused on becoming a benchmark in energy generation and the provision of services to guarantee the sustainability of the planet.” Source: company website · checked Aug 31, 2026	Albacete, Spain	51-200	32	4
7	IGU EnergyPartial evidence “iGU Energy nace con la vocación de contribuir en la transición energética global y promover una economía descarbonizada.” Source: company website · checked Aug 31, 2026	Madrid, Spain	11-50	23	2
8	Altano EnergyPartial evidence “Altano Energy is an institutional renewables platform, lead by a strong executive team with a combined experience over 150 years in the infrastructure and energy sectors and…” Source: company website · checked Aug 31, 2026	Madrid, Spain	11-50	18	4
9	Uriel Renovables, S.APartial evidence “Uriel Renovables, S.A.(URSA) es una compañía dedicada a la promoción, construcción y explotación de proyectos de energías renovables.” Source: company website · checked Aug 31, 2026	Madrid, Spain	1-10	17	1
10	Integralia EnergiaPartial evidence “Integralia Energía desarrolla proyectos energéticos de calidad, eficientes y rentables, con la máxima profesionalidad.” Source: company website · checked Aug 31, 2026	Cartagena, Spain	51-200	16	5
11	Energía AljavalPartial evidence “Energía Aljaval is a Spanish developer and investor in renewable energies, focusing on photovoltaic, wind and biomass.” Source: company website · checked Aug 31, 2026	Cordoba, Spain	11-50	14	1
12	Alter5Partial evidence “Alter5 is an investment platform that caters to institutional investors in the renewable energy sector, focusing on utility-scale solar and wind projects, as well as…” Source: company website · checked Aug 31, 2026	Madrid, Spain	1-10	11	6
13	Frontier RenewablesStrong evidence “Frontier Renewables is a global investment management firm focused on investing in renewable energy infrastructure projects to help accelerate the world’s clean energy transition.” Source: company website · checked Aug 31, 2026	Madrid, Spain	11-50	6	3
14	Hydroh2Indirect evidence “At HydroH2, we believe that the greatest challenges of our time create the most significant opportunities.” Source: company website · checked Aug 31, 2026	Madrid, Spain	11-50	5	2
15	Austral Venture Gestion Sgeic SAUStrong evidence “Sociedad gestora de entidades de inversión en el sector de las renovables, transferencia tecnológica y Venture Capital.” Source: company website · checked Aug 31, 2026	Sevilla, Spain	1-10	5	1
16	Enagás EmprendeStrong evidence “Investing and accelerating energy projects to boost energy transition A Corporate Venture Capital that invests and accelerates startups, projects and disruptive technologies to…” Source: company website · checked Aug 31, 2026	Madrid, Spain	11-50	4	2
17	Naiad RenovablesPartial evidence “Desarrollamos proyectos globales de energías renovables y comunicaciones, creando alianzas con actores estratégicos en los países donde operamos.” Source: company website · checked Aug 31, 2026	Palma, Spain	11-50	4	1
18	Glide EnergyPartial evidence “Supporting the energy transition towards a future powered by sustainable energy” Source: company website · checked Aug 31, 2026	Madrid, Spain	11-50	4	1
19	Senergy Holding GroupPartial evidence “SENERGY HOLDING GROUP es un grupo inversor español presente en diversos sectores como energía, agricultura e industria que, con el esfuerzo de un gran equipo de profesionales, ha…” Source: company website · checked Aug 31, 2026	Barcelona, Spain	201-500	3	2
20	The Green TIE CapitalPartial evidence “Green Tie Capital® was constituted in 2019 by a group of experts in various fields (legal, tax, technical, financial) related to the investment and divestment, management, and…” Source: company website · checked Aug 31, 2026	Sevilla, Spain	11-50	3	2
21	OdenraPartial evidence “Renewable Development - Investment - Advisory Sectors - Renewable Energy and Sustainable Development - Tech Startups” Source: company website · checked Aug 31, 2026	Arnedo, Spain	1-10	3	1
22	QonsiusStrong evidence “Qonsius Capital is a Madrid-based strategic advisory and venture building firm focused on the cleantech sector.” Source: company website · checked Aug 31, 2026	Las Rozas De Madrid, Spain	1-10	3	1
23	Alium TechnologiesStrong evidence “Alium Technologies is a clean energy project development company founded in 2018 by a team of professionals with more than twenty years of experience in the renewable and energy…” Source: company website · checked Aug 31, 2026	Boadilla Del Monte, Spain	11-50	2	1
24	Maka Forge HoldingIndirect evidence “We invest into sustainable projects.” Source: company website · checked Aug 31, 2026	Spain	1-10	1	1

Showing 24 of 56 clean energy venture capital companies based in Spain

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Clean energy venture capital companies based in Spain at a glance

As of Aug 31, 2026

11-50Median size (employees)

MadridLargest hub · 23 HQs

80Contacts with mobile numbers

Aug 31, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Clean energy venture capital companies by metro

Metro	Companies
Clean energy venture capital companies in Madrid	23
Clean energy venture capital companies in Sevilla	7
Clean energy venture capital companies in Barcelona	4
Clean energy venture capital companies in Valencia	2
Clean energy venture capital companies in Las Rozas De Madrid	2
Clean energy venture capital companies in Cieza	1
Clean energy venture capital companies in San Sebastian	1

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 venture capital companies, 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: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
What qualifies: Companies headquartered in Spain whose own description of what they do matches “clean energy venture capital companies”. 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 clean energy venture capital companies, 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.
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, 283 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 August 31, 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

How many clean energy venture capital companies are there based in Spain?

There are 56 clean energy venture capital companies headquartered in Spain as of August 2026 (RevenueBase).

What is the largest company on this list?

Atlas Renewable Energy, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most clean energy venture capital companies?

Madrid leads with 23 headquartered companies, followed by Sevilla (7) and Barcelona (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 283 verified decision-maker contacts tracked across these 56 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.