Company lists · Data refreshed September 2026

Top 21 Ocean energy companies based in Spain

Name: Ocean energy companies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 52 companies tracked

RevenueBase identified 52 ocean energy companies headquartered in Spain as of September 2026 and tracks 2,654 professional contacts across them, including 812 with verified work emails. Madrid is the largest hub.

This list covers ocean energy companies 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 17, 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 17, 2026 86% judged on-target in blind review

52Companies

2,654Contacts tracked

812Verified emails

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The 21 largest ocean energy companies based in Spain

Ranked by team size

Top 21 of 52 ocean energy companies based in Spain, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to ocean energy companies: 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	Zelestra	Indirect evidence	SpainHQ checked Sep 17, 2026	501-1,000	929 contacts →
	Indirect evidence “At Zelestra, we are on a mission to change the world by making decarbonization a reality for our partners.” Source: RevenueBase Database · checked Sep 17, 2026
2	OW Ocean Winds	Strong evidence	Madrid, SpainHQ checked Sep 17, 2026	501-1,000	595 contacts →
	Strong evidence “Ocean Winds (OW) is an international company dedicated to offshore wind, leading a new era of clean energy by turning ocean winds into power that lights up homes, businesses, and…” Source: RevenueBase Database · checked Sep 17, 2026
3	Greening	Partial evidence	Granada, SpainHQ checked Sep 17, 2026	501-1,000	175 contacts →
	Partial 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 17, 2026
4	Diverxia	Indirect evidence	Valencia, SpainHQ checked Sep 17, 2026	51-200	83 contacts →
	Indirect evidence “Diverxia is a global company focused on the development and execution of large-scale renewable projects.” Source: RevenueBase Database · checked Sep 17, 2026
5	Wavegarden	Indirect evidence	San Sebastian, SpainHQ checked Sep 17, 2026	51-200	79 contacts →
	Indirect evidence “Wavegarden is an innovative engineering company dedicated to the research, design, manufacture, installation, commissioning of wave generation systems, and the construction and…” Source: RevenueBase Database · checked Sep 17, 2026
6	Univergy Solar	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	51-200	71 contacts →
	Partial evidence “Univergy Solar es una empresa hispano-japonesa especializada en el desarrollo y construcción de proyectos de energía solar, eólica y de hidrógeno verde, incluyendo soluciones de…” Source: RevenueBase Database · checked Sep 17, 2026
7	Arena Green Power	Partial evidence	Seville, SpainHQ checked Sep 17, 2026	51-200	61 contacts →
	Partial evidence “ARENA Green Power is an independent Renewable Energy company focused in the Development, Construction and Operation of proprietary projects and also in providing turnkey…” Source: RevenueBase Database · checked Sep 17, 2026
8	Gnera Energia	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	11-50	52 contacts →
	Partial evidence “The GNERA group was created to participate in the transition towards a new energy model, assuming the dual mission of integrating new energy sources and new technology, while…” Source: RevenueBase Database · checked Sep 17, 2026
9	Bluefloat Energy	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	51-200	49 contacts →
	Partial evidence “With a corporate vision of accelerating the global deployment of offshore wind as a key enabler for the energy transition and economic growth, BlueFloat Energy is developing…” Source: RevenueBase Database · checked Sep 17, 2026
10	Progressum Energy Developments	Indirect evidence	Pozuelo De Alarcón, SpainHQ checked Sep 17, 2026	11-50	41 contacts →
	Indirect evidence “Progressum was born in London in October 2012 based on values of excellence and professionalism with the aim of being a ‘Tailor Made’ company for those who wanted to develop and…” Source: RevenueBase Database · checked Sep 17, 2026
11	Hanwha Energy Europe	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	51-200	30 contacts →
	Partial evidence “Headquartered in Madrid, Hanwha Energy Europe is a leading player in the renewable energy sector.” Source: RevenueBase Database · checked Sep 17, 2026
12	Amda Energía	Partial evidence	Zaragoza, SpainHQ checked Sep 17, 2026	11-50	28 contacts →
	Partial evidence “Compañía especializada en la promoción, desarrollo, construcción y operación de proyectos de alto valor tecnológico en el campo de las energías renovables, siempre en un marco de…” Source: RevenueBase Database · checked Sep 17, 2026
13	Uriel Renovables, S.A	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	1-10	18 contacts →
	Partial evidence “Uriel Renovables, S.A.(URSA) es una compañía dedicada a la promoción, construcción y explotación de proyectos de energías renovables.” Source: RevenueBase Database · checked Sep 17, 2026
14	Wedge Global	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	11-50	17 contacts →
	Partial evidence “Wedge Global is an innovative technology and services provider for the marine energy market.” Source: RevenueBase Database · checked Sep 17, 2026
15	Enerocean S.L	Indirect evidence	Málaga, SpainHQ checked Sep 17, 2026	11-50	15 contacts →
	Indirect evidence “We are the developers of #W2Power, the first twin turbine floating solution to be tested at open sea in the World.” Source: RevenueBase Database · checked Sep 17, 2026
16	Magallanes Renovables	Partial evidence	Redondela, SpainHQ checked Sep 17, 2026	11-50	12 contacts →
	Partial evidence “Magallanes Renovables is a leader tidal energy company focused on generating clean and 100% predictable energy from tidal currents.” Source: RevenueBase Database · checked Sep 17, 2026
17	RIC Renovables	Partial evidence	Santa Cruz De Tenerife, SpainHQ checked Sep 17, 2026	1-10	12 contacts →
	Partial evidence “RIC Renovables nace con la idea de aprovechar al máximo los recursos energéticos que nos brinda la naturaleza, para así darle un respiro a nuestro planeta.” Source: RevenueBase Database · checked Sep 17, 2026
18	CEAR	Partial evidence	Zaragoza, SpainHQ checked Sep 17, 2026	11-50	9 contacts →
	Partial evidence “CEAR es una compañía especializada en el desarrollo de proyectos de generación de energía por medio de fuentes renovable.” Source: RevenueBase Database · checked Sep 17, 2026
19	Euthenia Deep Green	Partial evidence	Marbella (málaga), SpainHQ checked Sep 17, 2026	11-50	7 contacts →
	Partial evidence “Euthenia ENERGY (EE) is a privately-held international company dedicated to renewable and sustainable energy solutions.” Source: RevenueBase Database · checked Sep 17, 2026
20	Tartessos Power Development	Partial evidence	Sevilla, SpainHQ checked Sep 17, 2026	1-10	2 contacts →
	Partial evidence “Tartessos Power Development (TPD) is a renewable energy developer and operator with a strong presence in Southern Europe.” Source: RevenueBase Database · checked Sep 17, 2026
21	Mater Energía SL	Partial evidence	Madrid, SpainHQ checked Sep 17, 2026	11-50	1 contacts →
	Partial evidence “In the renewable energy sector, Mater Energia is considered one of the most experienced developers worldwide, with expertise in solar as well as both onshore and offshore wind…” Source: RevenueBase Database · checked Sep 17, 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: ocean 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 ocean energy companies.
Partial evidence: Its own public description names part of ocean energy companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name ocean 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 21 of 52 ocean energy companies based in Spain

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Ocean energy companies based in Spain at a glance

As of Sep 17, 2026

30.6%Verified-email coverage

51.0Average contacts per company

11-50Median size (employees)

32.7%Largest-city concentration · Madrid

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 52 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 ocean 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 “ocean 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 ocean 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 ocean 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, 812 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 17, 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.

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 ocean energy companies, 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 ocean energy companies are there based in Spain?

RevenueBase identified 52 ocean energy companies 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?

Zelestra, headquartered in Spain, tops this list with the largest team on record.

Which city has the most ocean energy companies?

Madrid leads with 17 headquartered companies, followed by Malaga (3) and Alcobendas (2).

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 812 verified decision-maker contacts tracked across these 52 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 17, 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.