Company lists · Data refreshed September 2026

Top 25 Energy infrastructure companies based in Spain

Name: Energy infrastructure companies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 226 companies tracked

RevenueBase identified 226 energy infrastructure companies headquartered in Spain as of September 2026 and tracks 23,664 professional contacts across them, including 852 with verified work emails. Madrid is the largest hub.

This list covers energy infrastructure 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 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 16, 2026 86% judged on-target in blind review

226Companies

23,664Contacts tracked

852Verified emails

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The 25 largest energy infrastructure companies based in Spain

Ranked by team size

Top 25 of 226 energy infrastructure companies based in Spain, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to energy infrastructure companies: 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	Iberdrola	Partial evidence	Bilbao, SpainHQ checked Sep 16, 2026	10001+	7,598 contacts →
	Partial evidence “With more than 180 years of history, Iberdrola is today a global energy leader, the leading wind power producer and one of the largest electricity companies in the world in terms…” Source: RevenueBase Database · checked Sep 16, 2026
2	Isolux Corsan	Strong evidence	Madrid, SpainHQ checked Sep 16, 2026	5,001-10,000	1,649 contacts →
	Strong evidence “Isolux is a global benchmark in energy, water and environmental, road and railways infrastructure with presence in more than 35 countries on four continents.” Source: RevenueBase Database · checked Sep 16, 2026
3	EDP España	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	1,001-5,000	774 contacts →
	Partial evidence “Estamos creado una nueva energía en el planeta.” Source: RevenueBase Database · checked Sep 16, 2026
4	Comfica Soluciones Integrales S.L	Indirect evidence	Fuenlabrada, SpainHQ checked Sep 16, 2026	201-500	684 contacts →
	Indirect evidence “Empresa especializada en la ingenieria, desarrollo, construccion, instalación, y puesta en marcha de instalaciones de telecomunicaciones, electricidad, señalización, redes de…” Source: RevenueBase Database · checked Sep 16, 2026
5	Lanco Infratech Limited	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	1,001-5,000	314 contacts →
	Partial evidence “LANCO INFRATECH LIMITED is an oil and energy company based out of Calle Laguna del Marquesado Nª 19, Nave 16 Edificio Adriana 1ª Planta, Polígono Industrial La Resina…” Source: RevenueBase Database · checked Sep 16, 2026
6	Redexis	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	201-500	205 contacts →
	Partial evidence “Grupo Redexis es un conjunto de sociedades de infraestructuras comprometidas con la transición energética, el desarrollo de los gases renovables y el crecimiento sostenible…” Source: RevenueBase Database · checked Sep 16, 2026
7	Capital Energy	Partial evidence	Pozuelo De Alarcón, SpainHQ checked Sep 16, 2026	201-500	203 contacts →
	Partial evidence “Somos una compañía española con más de 20 años en el sector energético.” Source: RevenueBase Database · checked Sep 16, 2026
8	Nexus Energía	Partial evidence	Barcelona, SpainHQ checked Sep 16, 2026	201-500	202 contacts →
	Partial evidence “Nexus Energía es una empresa energética cuyo buque insignia es la comercialización de electricidad y gas natural.” Source: RevenueBase Database · checked Sep 16, 2026
9	Quadrante Izharia	Indirect evidence	Las Rozas De Madrid, SpainHQ checked Sep 16, 2026	1,001-5,000	178 contacts →
	Indirect evidence “Nos dedicamos a la Ingeniería de Subestaciones y Lineas de AT y MT.” Source: RevenueBase Database · checked Sep 16, 2026
10	Initec Energía	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	201-500	168 contacts →
	Partial evidence “INITEC Energía focuses its activity on the construction of electricity generation facilities.” Source: RevenueBase Database · checked Sep 16, 2026
11	Tradivel	Partial evidence	Alcorcón, SpainHQ checked Sep 16, 2026	501-1,000	166 contacts →
	Partial evidence “En Tradivel llevamos más de 20 años ofreciendo una amplia gama de servicios energéticos poniendo foco en la calidad del servicio y la satisfacción de nuestros clientes.” Source: RevenueBase Database · checked Sep 16, 2026
12	Reganosa	Partial evidence	Mugardos, SpainHQ checked Sep 16, 2026	51-200	155 contacts →
	Partial evidence “Reganosa es un grupo energético global de matriz española centrado en la gestión y desarrollo de infraestructuras y soluciones energéticas.” Source: RevenueBase Database · checked Sep 16, 2026
13	Syneox Rail	Partial evidence	Alcobendas, SpainHQ checked Sep 16, 2026	501-1,000	155 contacts →
	Partial evidence “Railway Energy Systems International Contractor” Source: RevenueBase Database · checked Sep 16, 2026
14	Nortegas	Partial evidence	Bilbao, SpainHQ checked Sep 16, 2026	201-500	153 contacts →
	Partial evidence “Nortegas es una compañía de infraestructuras y servicios energéticos que cuenta con más de un millón de clientes, tanto domésticos como industriales, a quienes suministra gas…” Source: RevenueBase Database · checked Sep 16, 2026
15	Voltae Engineering	Indirect evidence	Sevilla, SpainHQ checked Sep 16, 2026	51-200	132 contacts →
	Indirect evidence “Somos una compañía de ingeniería y consultoría altamente especializada, ofreciendo servicios integrales de alto valor en proyectos de transmisión, distribución y generación de…” Source: RevenueBase Database · checked Sep 16, 2026
16	BNZ	Partial evidence	Barcelona, SpainHQ checked Sep 16, 2026	11-50	131 contacts →
	Partial evidence “BNZ is an independent power producer (IPP) that develops, builds, and operates renewable energy projects in Europe, particularly in Portugal, Italy, and Spain.” Source: RevenueBase Database · checked Sep 16, 2026
17	Enso Energy Environment & Sustainability	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	51-200	72 contacts →
	Partial evidence “ENSO Energy Environment and Sustainability se dedica al desarrollo, promoción, construcción y operación de plantas de generación eléctrica y térmica.” Source: RevenueBase Database · checked Sep 16, 2026
18	MEINS	Partial evidence	Salamanca, SpainHQ checked Sep 16, 2026	51-200	63 contacts →
	Partial evidence “Meins is a leading supplier of disruptive and precast solutions in the Renewable Energy, Data Center, and Mobility sectors, specializing in the supply and integration of HV…” Source: RevenueBase Database · checked Sep 16, 2026
19	CELEO	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	501-1,000	60 contacts →
	Partial evidence “Founded in 2009, Celeo Concesiones e Inversiones (Celeo) purpose is to identify and manage worldwide investments in power transmission and renewable energy projects.” Source: RevenueBase Database · checked Sep 16, 2026
20	Inael Electrical Systems	Indirect evidence	Toledo., SpainHQ checked Sep 16, 2026	51-200	56 contacts →
	Indirect evidence “Over 45 years endorse us in the Power Sector with advanced solutions in the manufacture and distribution of electrical equipment for medium and high voltage.” Source: RevenueBase Database · checked Sep 16, 2026
21	Elecam	Partial evidence	San Agustín De Guadalix, SpainHQ checked Sep 16, 2026	11-50	56 contacts →
	Partial evidence “Empresa dedicada a Instalaciones Eléctricas/energéticas tanto a particulares como grandes empresas.” Source: RevenueBase Database · checked Sep 16, 2026
22	Eranovum	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	51-200	53 contacts →
	Partial evidence “Eranovum es una empresa española fundada en 2019 que acelera la transición hacia un modelo energético sostenible, basado en energías renovables, autoconsumo y movilidad eléctrica.” Source: RevenueBase Database · checked Sep 16, 2026
23	MET Energía España	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	11-50	48 contacts →
	Partial evidence “MET Energía España es la filial ibérica del grupo MET.” Source: RevenueBase Database · checked Sep 16, 2026
24	Iberapa Iberica DE Aparellajes	Indirect evidence	Masamagrell, SpainHQ checked Sep 16, 2026	51-200	46 contacts →
	Indirect evidence “Iberapa manufacturer of high voltage electrical control and protection equipment: distribution overhead lines, AT MT substations, secondary transformer stations, wind farms…” Source: RevenueBase Database · checked Sep 16, 2026
25	Prime Energy	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	51-200	42 contacts →
	Partial evidence “Somos Colaborador Oficial de IBERDROLA, grupo empresarial dedicado a la producción, distribución y comercialización de energía.” Source: RevenueBase Database · checked Sep 16, 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: energy infrastructure companies. 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 energy infrastructure companies.
Partial evidence: Its own public description names part of energy infrastructure companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy infrastructure companies. 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 226 energy infrastructure companies based in Spain

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Energy infrastructure companies based in Spain at a glance

As of Sep 16, 2026

3.6%Verified-email coverage

104.7Average contacts per company

11-50Median size (employees)

21.7%Largest-city concentration · Madrid

Sep 16, 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

10001+

Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 226 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 energy infrastructure companies, 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 Spain whose own description of what they do matches “energy infrastructure companies”. 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 energy infrastructure companies), 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 energy infrastructure 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 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, 852 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 16, 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.

Energy infrastructure companies by metro

Energy infrastructure companies in Madrid49

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 energy infrastructure companies, 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 energy infrastructure companies are there based in Spain?

RevenueBase identified 226 energy infrastructure companies 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?

Iberdrola, headquartered in Bilbao, tops this list with the largest team on record.

Which city has the most energy infrastructure companies?

Madrid leads with 49 headquartered companies, followed by Sevilla (15) and Barcelona (8).

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 852 verified decision-maker contacts tracked across these 226 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 16, 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.