Company lists · Data refreshed November 2026

Top 25 Grid extension contractors based in Spain

RevenueBase identified 246 company matches for grid extension contractors associated with Spain as of November 2026 and tracks 7,506 professional contacts across them, including 570 with verified work emails. Madrid is the largest hub.

This list covers company matches for grid extension contractors 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 November 6, 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 Nov 6, 2026 How this list was built
246Companies
7,506Contacts tracked
570Verified emails
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The 25 largest grid extension contractors based in Spain

Ranked by team size
Top 25 of 246 company matches for grid extension contractors based in Spain, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchMadrid, SpainHQ recorded Nov 6, 20265,001-10,0001,859 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 · Nov 6, 2026 · View company records in RevenueBase
2Exact matchZamudio, SpainHQ recorded Nov 6, 2026501-1,000826 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchPalma De Mallorca, SpainHQ recorded Nov 6, 20261,001-5,000650 contacts →

Exact match

“SAMPOL is an independent, multinational, family owned company founded in 1934 and a leader in the implementation of Energy projects, Electrical installations, Telecommunications…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchMadrid, SpainHQ recorded Nov 6, 20261,001-5,000546 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 · Nov 6, 2026 · View company records in RevenueBase
5Exact matchLas Rozas De Madrid, SpainHQ recorded Nov 6, 20261,001-5,000182 contacts →

Exact match

“Nos dedicamos a la Ingeniería de Subestaciones y Lineas de AT y MT.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchMadrid, SpainHQ recorded Nov 6, 2026201-500151 contacts →

Exact match

“ELECTRÉN, S.A.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchPaterna, SpainHQ recorded Nov 6, 202651-200144 contacts →

Exact match

“Vestel Ingenieros es una empresa con 20 años de experiencia que tiene el propósito de convertirse en la ingeniería eléctrica nº1 de España.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchA Coruña, SpainHQ recorded Nov 6, 2026201-500138 contacts →

Exact match

“LA EMPRESA Y SUS VALORES Osmos tiene por misión la prestación de servicios eléctricos, abarcando la instalación desde su concepción, realizando el montaje y manteniendo las…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchEl Palmar (murcia), SpainHQ recorded Nov 6, 202651-20096 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 · Nov 6, 2026 · View company records in RevenueBase
10Exact matchSalamanca, SpainHQ recorded Nov 6, 202651-20077 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchBarcelona, SpainHQ recorded Nov 6, 2026201-50075 contacts →

Exact match

“LYMET, con más de 30 años de existencia, es la sociedad de cabecera de un grupo de empresas, formado actualmente por la propia LYMET, por LYMET Energía, LYMET Obra Civil, LYMET…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchSan Agustín De Guadalix, SpainHQ recorded Nov 6, 202611-5071 contacts →

Exact match

“Empresa dedicada a Instalaciones Eléctricas/energéticas tanto a particulares como grandes empresas.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchToledo., SpainHQ recorded Nov 6, 202651-20060 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchFuenlabrada, SpainHQ recorded Nov 6, 202651-20058 contacts →

Exact match

“FLULLE surge en 1990 en Fuenlabrada (Madrid) como empresa de instalaciones eléctricas.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchMadrid, SpainHQ recorded Nov 6, 202651-20054 contacts →

Exact match

“SESELEC es una empresa EPC especializada en infraestructura eléctrica (Subestaciones, Líneas de Transmisión, Plantas Fotovoltaicas) dentro de México, Latinoamérica y España.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchAlmería, SpainHQ recorded Nov 6, 202651-20054 contacts →

Exact match

“Proporcionamos un servicio integral que abarca desde el diseño e ingeniería hasta el mantenimiento de instalaciones pasando por todas las fases de asesoramiento, obra, ejecución y…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchVigo, SpainHQ recorded Nov 6, 202651-20051 contacts →

Exact match

“CONELEC, S.A.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchBaena, SpainHQ recorded Nov 6, 202651-20029 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 · Nov 6, 2026 · View company records in RevenueBase
19Exact matchSan Fernando De Henares, SpainHQ recorded Nov 6, 202651-20028 contacts →

Exact match

“Especialistas en la realización de Ingeniería Global para infraestructuras eléctricas.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchMadrid, SpainHQ recorded Nov 6, 202611-5023 contacts →

Exact match

“Osprel es una empresa española que surge como respuesta a la existente necesidad mundial de una ingeniería de calidad en la planificación, transporte y distribución de energía…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchZaragoza, SpainHQ recorded Nov 6, 202651-20023 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchFene, SpainHQ recorded Nov 6, 202651-20022 contacts →

Exact match

“En INPROAFE contribuimos al desarrollo tecnológico del tejido industrial, poniendo a disposición del cliente productos adaptados a sus exigencias con la máxima calidad y servicio…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchSeville, SpainHQ recorded Nov 6, 20261-1020 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchVillamediana De Iregua, SpainHQ recorded Nov 6, 202611-5019 contacts →

Exact match

“PIMER es una empresa de servicios eléctricos, especializada en ingeniería y gestión de proyectos ofreciendo un servicio integral desde la consultoría hasta la puesta en marcha.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchCoslada, SpainHQ recorded Nov 6, 202611-5018 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 · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 246 grid extension contractors based in Spain

See the full list, filter by size, metro and specialty, and access 570 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Grid extension contractors based in Spain at a glance

As of Nov 6, 2026
7.6%Verified-email coverage
30.5Average contacts per company
11-50Median size (employees)
13.8%Largest-city concentration · Madrid
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
85
11-50
100
51-200
39
201-500
9
501-1,000
3
1,001-5,000
6
5,001-10,000
1

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 246 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 “grid extension contractors” 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 570 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 November 6, 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.

Grid extension contractors by metro

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 “grid extension contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many grid extension contractors are there based in Spain?

RevenueBase identified 246 company matches for grid extension contractors associated with Spain as of November 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 grid extension contractors?

Madrid leads with 34 company records, followed by Barcelona (10) and Seville (7).

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 570 professional contacts with verified work emails tracked across these 246 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 November 6, 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.