Company lists · Data refreshed September 2026

Top 23 Energy infrastructure operators based in Spain

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 303 companies tracked

RevenueBase identified 303 energy infrastructure operators headquartered in Spain as of September 2026 and tracks 26,854 professional contacts across them, including 1,856 with verified work emails. Madrid is the largest hub.

This list covers energy infrastructure operators 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

303Companies

26,854Contacts tracked

1,856Verified emails

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The 23 largest energy infrastructure operators based in Spain

Ranked by team size

Top 23 of 303 energy infrastructure operators 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 operators: 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	Grupo Cobra	Indirect evidence	Madrid, SpainHQ checked Sep 16, 2026	10001+	4,478 contacts →
	Indirect evidence “Grupo Cobra es una compañía global de más de 80 años de experiencia en el sector de la ingeniería industrial aplicada y servicios especializados.” 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	COX	Partial evidence	Sevilla, SpainHQ checked Sep 16, 2026	5,001-10,000	1,098 contacts →
	Partial evidence “Cox is a vertically integrated global utility in the water and energy sectors, at the forefront of addressing the greatest challenges of the green transition.” Source: RevenueBase Database · checked Sep 16, 2026
4	Enagás	Indirect evidence	Madrid, SpainHQ checked Sep 16, 2026	1,001-5,000	1,083 contacts →
	Indirect evidence “Enagas is the Technical Manager of the Spanish Gas System and the main carrier of natural gas in Spain.” Source: RevenueBase Database · checked Sep 16, 2026
5	RED Eléctrica	Indirect evidence	Alcobendas, SpainHQ checked Sep 16, 2026	1,001-5,000	1,034 contacts →
	Indirect evidence “Red Eléctrica fue la primera empresa en el mundo dedicada en exclusividad al transporte de electricidad y a la operación de sistemas eléctricos.” Source: RevenueBase Database · checked Sep 16, 2026
6	IGNIS	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	501-1,000	533 contacts →
	Partial evidence “We are a vertically integrated energy company and offer tailored solutions for large consumers and for new energy demands, such as data centers.” Source: RevenueBase Database · checked Sep 16, 2026
7	Grupo Lantania	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	1,001-5,000	475 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026
8	Tetrace	Indirect evidence	Pamplona, SpainHQ checked Sep 16, 2026	501-1,000	441 contacts →
	Indirect evidence “TETRACE es un Grupo Empresarial dedicado a ingeniería, construcción y mantenimiento de activos renovables, constituido en 2010.” Source: RevenueBase Database · checked Sep 16, 2026
9	Isastur	Indirect evidence	Llanera, SpainHQ checked Sep 16, 2026	1,001-5,000	371 contacts →
	Indirect evidence “El holding ISASTUR está integrado por un conjunto de empresas con distintas actividades que por su tradición y experiencia están fundamentalmente vinculadas con el sector de la…” Source: RevenueBase Database · checked Sep 16, 2026
10	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
11	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
12	Exus Renewables	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	51-200	193 contacts →
	Partial evidence “Exus Renewables Europe is an Energy Solutions Provider active across the full energy value chain, from development and construction to ownership, operations, and third-party asset…” Source: RevenueBase Database · checked Sep 16, 2026
13	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
14	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
15	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
16	Cansol Energy Solutions	Partial evidence	Granada, SpainHQ checked Sep 16, 2026	51-200	151 contacts →
	Partial evidence “CANSOL ENERGY SOLUTIONS, construyendo un futuro sostenible.” Source: RevenueBase Database · checked Sep 16, 2026
17	Esergui - Avia	Partial evidence	Donostia - San Sebastián, SpainHQ checked Sep 16, 2026	201-500	145 contacts →
	Partial evidence “Hace 43 años nos pusimos al frente de una transformación energética.” Source: RevenueBase Database · checked Sep 16, 2026
18	Monrabal	Partial evidence	Valencia, SpainHQ checked Sep 16, 2026	51-200	101 contacts →
	Partial evidence “Monrabal, empresa referente en el sector de la energía, con más de 50 años de experiencia.” Source: RevenueBase Database · checked Sep 16, 2026
19	Grupo Neoelectra	Partial evidence	Sant Just Desvern, SpainHQ checked Sep 16, 2026	201-500	92 contacts →
	Partial evidence “Neoelectra es un grupo empresarial especializado en aportar soluciones energéticas eficientes a la industria.” Source: RevenueBase Database · checked Sep 16, 2026
20	Emurtel	Indirect evidence	El Palmar (murcia), SpainHQ checked Sep 16, 2026	51-200	92 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
21	Siter Ingeniería DE Infraestructuras	Indirect evidence	Bilbao, SpainHQ checked Sep 16, 2026	51-200	86 contacts →
	Indirect evidence “SITER INGENIERÍA DE INFRAESTRUCTURAS es una compañía con más de 25 años de historia, que opera dando soporte a operadores y empresas relacionadas con el desarrollo de…” Source: RevenueBase Database · checked Sep 16, 2026
22	NESS	Partial evidence	Madrid, SpainHQ checked Sep 16, 2026	11-50	81 contacts →
	Partial evidence “NESS, empresa de servicios energéticos especializada en la gestión y ahorro energético.” Source: RevenueBase Database · checked Sep 16, 2026
23	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

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 operators. 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 operators.
Partial evidence: Its own public description names part of energy infrastructure operators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy infrastructure operators. 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 23 of 303 energy infrastructure operators based in Spain

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Energy infrastructure operators based in Spain at a glance

As of Sep 16, 2026

6.9%Verified-email coverage

88.6Average contacts per company

11-50Median size (employees)

24.1%Largest-city concentration · Madrid

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

126

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 303 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 operators, 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 operators”. 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 operators), 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 operators, 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, 1,856 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 operators by metro

Energy infrastructure operators in Madrid73

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 operators, 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 operators are there based in Spain?

RevenueBase identified 303 energy infrastructure operators 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?

Grupo Cobra, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most energy infrastructure operators?

Madrid leads with 73 headquartered companies, followed by Sevilla (11) and Barcelona (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 1,856 verified decision-maker contacts tracked across these 303 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.