Company lists · Data refreshed September 2026

Top 25 Electrical transmission contractors based in Spain

Name: Electrical transmission contractors based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 420 companies tracked

RevenueBase identified 420 electrical transmission contractors headquartered in Spain as of September 2026 and tracks 6,655 professional contacts across them, including 347 with verified work emails. Madrid is the largest hub.

This list covers electrical transmission contractors 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

420Companies

6,655Contacts tracked

347Verified emails

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The 25 largest electrical transmission contractors based in Spain

Ranked by team size

Top 25 of 420 electrical transmission contractors 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 electrical transmission contractors: 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	Comfica Soluciones Integrales S.L	Partial evidence	Fuenlabrada, SpainHQ checked Sep 16, 2026	201-500	684 contacts →
	Partial 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
2	Insyte Instalaciones	Indirect evidence	Getafe, SpainHQ checked Sep 16, 2026	1,001-5,000	628 contacts →
	Indirect evidence “Insyte Instalaciones inicia su actividad en 1990 como empresa instaladora en el sector eléctrico y de telecomunicaciones.” Source: RevenueBase Database · checked Sep 16, 2026
3	Lowind	Indirect evidence	Huarte, SpainHQ checked Sep 16, 2026	51-200	199 contacts →
	Indirect evidence “Somos una compañía especializada en instalación y mantenimiento de aerogeneradores, plantas fotovoltáicas e instalaciones eléctricas en edificios y plantas industriales.” Source: RevenueBase Database · checked Sep 16, 2026
4	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
5	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
6	Osmos Sistemas Eléctricos	Indirect evidence	A Coruña, SpainHQ checked Sep 16, 2026	201-500	121 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
7	Cableven	Indirect evidence	Málaga, SpainHQ checked Sep 16, 2026	501-1,000	103 contacts →
	Indirect evidence “Empresa cualificada y especializada en la instalación y mantenimiento de redes y equipos de telecomunicaciones.” Source: RevenueBase Database · checked Sep 16, 2026
8	Iquord	Indirect evidence	Aviles, SpainHQ checked Sep 16, 2026	51-200	85 contacts →
	Indirect evidence “Electroinnova instalaciones y mantenimientos S.L es una empresa asturiana con una clara voación de expansión internacional que nace con el objetivo de ofrecer y solucionar…” Source: RevenueBase Database · checked Sep 16, 2026
9	Flulle	Indirect evidence	Fuenlabrada, SpainHQ checked Sep 16, 2026	51-200	66 contacts →
	Indirect evidence “FLULLE surge en 1990 en Fuenlabrada (Madrid) como empresa de instalaciones eléctricas.” Source: RevenueBase Database · checked Sep 16, 2026
10	MEINS	Indirect evidence	Salamanca, SpainHQ checked Sep 16, 2026	51-200	63 contacts →
	Indirect 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
11	Seselec España	Indirect evidence	Madrid, SpainHQ checked Sep 16, 2026	51-200	61 contacts →
	Indirect evidence “SESELEC es una empresa EPC especializada en infraestructura eléctrica (Subestaciones, Líneas de Transmisión, Plantas Fotovoltaicas) dentro de México, Latinoamérica y España.” Source: RevenueBase Database · checked Sep 16, 2026
12	Inael Electrical Systems	Partial evidence	Toledo., SpainHQ checked Sep 16, 2026	51-200	56 contacts →
	Partial 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
13	Elecam	Indirect evidence	San Agustín De Guadalix, SpainHQ checked Sep 16, 2026	11-50	56 contacts →
	Indirect evidence “Empresa dedicada a Instalaciones Eléctricas/energéticas tanto a particulares como grandes empresas.” Source: RevenueBase Database · checked Sep 16, 2026
14	Iberapa Iberica DE Aparellajes	Partial evidence	Masamagrell, SpainHQ checked Sep 16, 2026	51-200	46 contacts →
	Partial 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
15	Montajes DE Electricidad Moya	Indirect evidence	Almería, SpainHQ checked Sep 16, 2026	51-200	43 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
16	Irecfer	Indirect evidence	Estepona, SpainHQ checked Sep 16, 2026	51-200	40 contacts →
	Indirect evidence “Irecfer (Instalaciones y Recursos Ferroviarios, S.L.) se dedica a la realización de obras ferroviarias para entidades públicas y empresas privadas.” Source: RevenueBase Database · checked Sep 16, 2026
17	LLANO	Partial evidence	Siero, SpainHQ checked Sep 16, 2026	51-200	40 contacts →
	Partial evidence “Electricidad Llano se crea en el año 1990 para dar servicio a las crecientes necesidades en instalaciones eléctricas.” Source: RevenueBase Database · checked Sep 16, 2026
18	Tecmo Instalaciones, Obras Y Servicios, S.A. Tecmo	Indirect evidence	Paterna, SpainHQ checked Sep 16, 2026	51-200	38 contacts →
	Indirect evidence “Tecmo nace con el firme propósito de proporcionar servicios de instalaciones eléctricas, tanto de Alta como Baja tensión, Telecomunicaciones e Instalaciones Especiales mediante la…” Source: RevenueBase Database · checked Sep 16, 2026
19	Conelec S.A	Indirect evidence	Vigo, SpainHQ checked Sep 16, 2026	51-200	38 contacts →
	Indirect evidence “CONELEC, S.A.” Source: RevenueBase Database · checked Sep 16, 2026
20	TDI Sistemas S.L	Indirect evidence	Madrid, SpainHQ checked Sep 16, 2026	51-200	37 contacts →
	Indirect evidence “TDI Sistemas es una compañía de capital privado íntegramente español.” Source: RevenueBase Database · checked Sep 16, 2026
21	GAROC	Indirect evidence	Ciudad Real, SpainHQ checked Sep 16, 2026	201-500	35 contacts →
	Indirect evidence “GAROC (GRUPO DE ARQUITECTURA Y OBRA CIVIL), nace en mayo de 2003 en Ciudad Real donde tiene su sede Social.” Source: RevenueBase Database · checked Sep 16, 2026
22	Itecla Ingeniería S.L	Indirect evidence	Baena, SpainHQ checked Sep 16, 2026	51-200	30 contacts →
	Indirect evidence “ITECLA es una ingeniería especializada en infraestructuras eléctricas de alta y media tensión y en proyectos de energías renovables a escala utility.” Source: RevenueBase Database · checked Sep 16, 2026
23	Rugar S.L	Indirect evidence	Alboraya, SpainHQ checked Sep 16, 2026	51-200	30 contacts →
	Indirect evidence “La empresa fue fundada en su actual estructura de sociedad limitada (después de unos años de andadura con otra estructura empresarial), por la familia Ruiz – Juliá, en enero del…” Source: RevenueBase Database · checked Sep 16, 2026
24	Inove Ingeniería	Indirect evidence	San Fernando De Henares, SpainHQ checked Sep 16, 2026	51-200	28 contacts →
	Indirect evidence “Especialistas en la realización de Ingeniería Global para infraestructuras eléctricas.” Source: RevenueBase Database · checked Sep 16, 2026
25	Inserty	Indirect evidence	Montcada I Reixac, SpainHQ checked Sep 16, 2026	51-200	28 contacts →
	Indirect evidence “Inserty es referente en el sector de las instalaciones de comunicaciones y eléctricas.” 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: electrical transmission contractors. 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 electrical transmission contractors.
Partial evidence: Its own public description names part of electrical transmission contractors, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name electrical transmission contractors. 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 420 electrical transmission contractors based in Spain

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Electrical transmission contractors based in Spain at a glance

As of Sep 16, 2026

5.2%Verified-email coverage

15.8Average contacts per company

11-50Median size (employees)

7.4%Largest-city concentration · Madrid

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

138

11-50

193

51-200

201-500

501-1,000

1,001-5,000

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 420 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 electrical transmission contractors, 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 “electrical transmission contractors”. 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 electrical transmission contractors), 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 electrical transmission contractors, 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, 347 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.

Electrical transmission contractors by metro

Electrical transmission contractors in Madrid31

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 electrical transmission contractors, 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 electrical transmission contractors are there based in Spain?

RevenueBase identified 420 electrical transmission contractors 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?

Comfica Soluciones Integrales S.L, headquartered in Fuenlabrada, tops this list with the largest team on record.

Which city has the most electrical transmission contractors?

Madrid leads with 31 headquartered companies, followed by Barcelona (13) and Sevilla (10).

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 347 verified decision-maker contacts tracked across these 420 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.