Company lists · Data refreshed October 2026

Top 25 Energy infrastructure builders based in Spain

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

Compiled by the RevenueBase Data Team Data refreshed Oct 12, 2026 100 companies tracked

RevenueBase identified 100 company matches for energy infrastructure builders associated with Spain as of October 2026 and tracks 5,481 professional contacts across them, including 216 with verified work emails. Madrid is the largest hub.

This list covers company matches for energy infrastructure builders associated with Spain, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 12, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Oct 12, 2026 How this list was built

100Companies

5,481Contacts tracked

216Verified emails

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The 25 largest energy infrastructure builders based in Spain

Ranked by team size

Top 25 of 100 company matches for energy infrastructure builders based in Spain, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 12, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Isolux Corsan	Exact match	Madrid, SpainHQ recorded Oct 12, 2026	5,001-10,000	1,784 contacts →
	Exact match “Isolux is a global benchmark in energy, water and environmental, road and railways infrastructure with presence in more than 35 countries on four continents.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
2	Grupo Lantania	Exact match	Madrid, SpainHQ recorded Oct 12, 2026	1,001-5,000	518 contacts →
	Exact match “En Lantania hacemos realidad grandes infraestructuras de transporte, agua y energía con el entusiasmo de una empresa joven y la solidez que nos aporta la experiencia.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
3	Lanco Infratech Limited	Exact match	Madrid, SpainHQ recorded Oct 12, 2026	1,001-5,000	316 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
4	Initec Energía	Exact match	Madrid, SpainHQ recorded Oct 12, 2026	201-500	182 contacts →
	Exact match “INITEC Energía focuses its activity on the construction of electricity generation facilities.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
5	Voltae Engineering	Exact match	Seville, SpainHQ recorded Oct 12, 2026	51-200	137 contacts →
	Exact match “Somos una compañía de ingeniería y consultoría altamente especializada, ofreciendo servicios integrales de alto valor en proyectos de transmisión, distribución y generación de…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
6	Tecopsa	Exact match	Madrid, SpainHQ recorded Oct 12, 2026	51-200	132 contacts →
	Exact match “Tecnología de la Construcción y Obras Públicas, S.A, tiene su origen en el sector de las energías renovables.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
7	Emurtel	Exact match	El Palmar (murcia), SpainHQ recorded Oct 12, 2026	51-200	96 contacts →
	Exact match “Emurtel es una compañía líder de ingeniería y consultoría multidisciplinar orientada a la gestión integral de proyectos, ofreciendo soluciones de valor añadido en el diseño…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
8	Grupo Cartago Ingenieros	Exact match	Madrid, SpainHQ recorded Oct 12, 2026	51-200	64 contacts →
	Exact match “Grupo CARTAGO desarrolla servicios de ingeniería y de dirección y supervisión de obra en la construcción y puesta en marcha de plantas industriales, petroquímicas, centrales…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
9	Conelec S.A	Exact match	Vigo, SpainHQ recorded Oct 12, 2026	51-200	52 contacts →
	Exact match “CONELEC, S.A.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
10	GAROC	Exact match	Ciudad Real, SpainHQ recorded Oct 12, 2026	201-500	45 contacts →
	Exact match “GAROC (GRUPO DE ARQUITECTURA Y OBRA CIVIL), nace en mayo de 2003 en Ciudad Real donde tiene su sede Social.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
11	Itecla Ingeniería S.L	Exact match	Baena, SpainHQ recorded Oct 12, 2026	51-200	29 contacts →
	Exact match “ITECLA es una ingeniería especializada en infraestructuras eléctricas de alta y media tensión y en proyectos de energías renovables a escala utility.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
12	Grupo Gestacur	Exact match	Albacete, SpainHQ recorded Oct 12, 2026	51-200	27 contacts →
	Exact match “Nuestra actividad central es la ejecución de obra civil en proyectos de producción de energía eléctrica, orientada a las Energías Renovables como Parques Eólicos, Plantas…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
13	Ogisa Infraestructuras S.A	Exact match	Zaragoza, SpainHQ recorded Oct 12, 2026	51-200	22 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
14	VP Ingeniería S.L	Exact match	Seville, SpainHQ recorded Oct 12, 2026	1-10	20 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
15	Aldama Y Díez Ingenieros Asociados S.L	Exact match	Bilbao, SpainHQ recorded Oct 12, 2026	11-50	18 contacts →
	Exact match “AyD has extensive experience in the development of large projects, fundamentally Conventional Thermal Power Plants and Combined Cycle Power Plants, in their bidding and planning…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
16	Enemek	Exact match	San Roque, SpainHQ recorded Oct 12, 2026	11-50	18 contacts →
	Exact match “Enemek is an EPC contractor specialised in utility-scale photovoltaic plants and Battery Energy Storage Systems (BESS).” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
17	Citracc Rail	Exact match	Coslada, SpainHQ recorded Oct 12, 2026	11-50	17 contacts →
	Exact match “Somos una compañía especializada en ingeniería, fabricación, instalación y mantenimiento de infraestructuras críticas para los sectores ferroviario y energético.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
18	Segade Saelco SA	Exact match	Ourense, SpainHQ recorded Oct 12, 2026	51-200	13 contacts →
	Exact match “Somos una empresa con más de 40 años de experiencia en la construcción de Líneas Eléctricas Aéreas y Subterráneas de Alta Tensión, en constante crecimiento y desarrollo.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
19	Proyelec	Exact match	Ciudad Real, SpainHQ recorded Oct 12, 2026	11-50	13 contacts →
	Exact match “Esta empresa nace a principios de los años 80, con carácter unipersonal, dedicada al montaje de instalaciones eléctricas, públicas y privadas, principalmente de media y baja…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
20	Westing Management LLC	Exact match	Bilbao, SpainHQ recorded Oct 12, 2026	51-200	10 contacts →
	Exact match “WM – Westing Management LLC is a company that specializes in EPC (engineering, procurement and construction) services for the “green” energy sector.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
21	I-Mbt Ingenieria E Instalaciones	Exact match	Madrid, SpainHQ recorded Oct 12, 2026	11-50	9 contacts →
	Exact match “i-MBT” es una empresa de servicios de ingeniería enfocada a las redes de distribución de energía de media y baja tensión, que además cuenta con personal para la ejecución de…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
22	Infralect Power Events	Exact match	Barberà Del Vallès, SpainHQ recorded Oct 12, 2026	11-50	7 contacts →
	Exact match “INFRALECT POWER EVENTS, S.A.U.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
23	Esasur Energía	Exact match	Seville, SpainHQ recorded Oct 12, 2026	11-50	7 contacts →
	Exact match “ESASUR fue creada como empresa del Grupo VISASUR, con la idea de concentrar y potenciar la actividad del mismo en el área de ingeniería e instalaciones, prestando servicios…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
24	Libener	Exact match	Tomares, SpainHQ recorded Oct 12, 2026	1-10	5 contacts →
	Exact match “Orientación al cliente y sus necesidades de inversión y explotación.” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase
25	Greening Energía	Exact match	Granada, SpainHQ recorded Oct 12, 2026	201-500	5 contacts →
	Exact match “Creada en 2011 con un firme compromiso con la sostenibilidad, Greening-e es una empresa de ámbito internacional especializada en el diseño, desarrollo, construcción y…” Recorded in the RevenueBase company graph · Oct 12, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “energy infrastructure builders”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 100 energy infrastructure builders based in Spain

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Energy infrastructure builders based in Spain at a glance

As of Oct 12, 2026

3.9%Verified-email coverage

54.8Average contacts per company

11-50Median size (employees)

17.0%Largest-city concentration · Madrid

Oct 12, 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 Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 100 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with Spain whose business descriptions match “energy infrastructure builders” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 216 professional contacts with verified work emails across the full matched dataset. 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 October 12, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “energy infrastructure builders”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy infrastructure builders are there based in Spain?

RevenueBase identified 100 company matches for energy infrastructure builders associated with Spain as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Isolux Corsan tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most energy infrastructure builders?

Madrid leads with 17 company records, followed by Seville (7) and Barcelona (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 216 professional contacts with verified work emails tracked across these 100 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 12, 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.