Company lists · Data refreshed September 2026
Top 25 Energy companies based in Spain
RevenueBase lists 392 energy companies based in Spain, with 35,434 business contacts and 3,055 email addresses. The directory covers organizations involved in producing, generating, transmitting, distributing, trading, or supplying energy. As of September 2026, Madrid is the single most-represented city among the companies on the list.
Energy companies produce, generate, transmit, distribute, trade, or supply energy and related energy products and services. This list covers companies that produce, generate, transmit, distribute, trade, or supply energy, including electricity, fuels, and renewable energy products. Ranked by team size, largest first. Data current as of September 6, 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.
The 25 largest energy companies based in Spain
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 7,598 contacts → | ||||
Strong 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 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | 4,646 contacts → | ||||
Strong evidence “Cepsa is a leading international company committed to sustainable mobility and energy with strong technical expertise after more than 90 years of activity.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | 3,951 contacts → | ||||
Indirect evidence “Gas Natural Fenosa is a leading multi-national in the gas and power sectors.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | 3,185 contacts → | ||||
Strong evidence “Naturgy es un grupo multinacional del sector energético con más de 180 años de historia.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | 774 contacts → | ||||
Strong evidence “Estamos creado una nueva energía en el planeta.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | 533 contacts → | ||||
Strong 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 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | 268 contacts → | ||||
Indirect evidence “The Spanish company MAETEL, with its head office located in the city of Zaragoza, which is integrated in the industrial division of ACS Group.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | 203 contacts → | ||||
Strong evidence “Somos una compañía española con más de 20 años en el sector energético.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | 202 contacts → | ||||
Strong evidence “Nexus Energía es una empresa energética cuyo buque insignia es la comercialización de electricidad y gas natural.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | 188 contacts → | ||||
Strong evidence “Fenie Energía es una comercializadora de energía formada por 1.800 empresas instaladoras eléctricas que serán su red comercial.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | 175 contacts → | ||||
Strong evidence “Greening is a global, vertically integrated renewable energy company that not only generates and markets its own green energy, but does so through a diversified portfolio of…” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | 166 contacts → | ||||
Strong 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 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | 153 contacts → | ||||
Strong 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 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | 145 contacts → | ||||
Strong evidence “Hace 43 años nos pusimos al frente de una transformación energética.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | 144 contacts → | ||||
Strong evidence “Perteneciente a la división de energía del Grupo Villar Mir, se establece con el objetivo de poner al servicio de otras empresas su experiencia en la optimización de costes…” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | 123 contacts → | ||||
Indirect evidence “Tot i que portem més de 100 anys en el sector elèctric, els nostres inicis són poc corrents.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | 111 contacts → | ||||
Indirect evidence “UFG was established in 1998 and it has been since then committed to the active participation in all the links of the natural gas value chain and in the infrastructure needed to…” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | 93 contacts → | ||||
Strong evidence “Bienvenido a CHC Energía.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | 83 contacts → | ||||
Strong evidence “Somos una familia de energías con más de 30 años de experiencia, comprometidos con ofrecer soluciones diversificadas y sostenibles en el sector energético.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | 79 contacts → | ||||
Strong evidence “Somos Gana Energía, la compañía de luz sin líos.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 22 | 69 contacts → | ||||
Strong evidence “Contáctanos en el 900 908 108 o info@odfenergia.es ODF Energía es una empresa que opera en el sector energético español.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 23 | 65 contacts → | ||||
Strong evidence “The energy industry is broken: oligopolistic in nature, high and unpredictable prices, highly pollutant and mostly non-digital results in it being the worst rated industry in…” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 24 | 61 contacts → | ||||
Indirect evidence “Des de 1987 distribuïm i comercialitzem combustibles i carburants arreu de Catalunya.” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 25 | 55 contacts → | ||||
Strong evidence “Enerclic Innovatio es una empresa tecnológica española especializada en soluciones digitales avanzadas para el sector energético, con todos sus desarrollos diseñados y…” Source: RevenueBase Database · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
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 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 companies.
- Partial evidence
- Its own public description names part of energy companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name energy 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 392 energy companies based in Spain
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Energy companies based in Spain at a glance
As of Sep 6, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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 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 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 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 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, 3,055 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 6, 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 companies by metro
Frequently asked
What are energy companies?
Energy companies produce, generate, transmit, distribute, trade, or supply energy and related products and services.
How many energy companies are based in Spain?
The directory lists 392 energy companies based in Spain, with 35,434 business contacts and 3,055 email addresses.
Which city has the most energy companies in this list?
Madrid is the single most-represented city among the companies on the list.
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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.