Company lists · Data refreshed September 2026

Top 15 Offshore platform maintenance companies based in Spain

RevenueBase identified 64 offshore platform maintenance companies headquartered in Spain as of September 2026 and tracks 1,683 professional contacts across them, including 155 with verified work emails. Algeciras is the largest hub.

This list covers offshore platform maintenance 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 29, 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 29, 2026 86% judged on-target in blind review
64Companies
1,683Contacts tracked
155Verified emails
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The 15 largest offshore platform maintenance companies based in Spain

Ranked by team size
Top 15 of 64 offshore platform maintenance companies based in Spain, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to offshore platform maintenance 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceMadrid, SpainHQ checked Sep 29, 20261,001-5,000450 contacts →

Indirect evidence

“MASA interviene en toda la cadena de actividades en la vida de las instalaciones e infraestructuras, desde su fase de proyecto, hasta la construcción y montaje de la instalación…”

Source: RevenueBase Database · checked Sep 29, 2026
2Indirect evidenceMadrid, SpainHQ checked Sep 29, 2026501-1,000292 contacts →

Indirect evidence

“Empresa de referencia del Grupo Cobra especializada en diseño, ingeniería, instalaciones y montajes mecánicos y eléctricos y mantenimiento industrial.”

Source: RevenueBase Database · checked Sep 29, 2026
3Indirect evidenceValladolid, SpainHQ checked Sep 29, 2026201-500150 contacts →

Indirect evidence

“Altertec es una empresa líder de mantenimiento integral del sector eólico que nace en 2004 con el objetivo de dar respuestas a las necesidades del sector.”

Source: RevenueBase Database · checked Sep 29, 2026
4Partial evidenceLas Palmas Of Gran Canaria, SpainHQ checked Sep 29, 2026201-500111 contacts →

Partial evidence

“Astilleros Canarios S.A.(Astican) is a leading privately owned ship repair yard, offering comprehensive repair, maintenance, and conversion services for all types of vessels…”

Source: RevenueBase Database · checked Sep 29, 2026
5Partial evidenceSanta Cruz De Tenerife, SpainHQ checked Sep 29, 2026201-50077 contacts →

Partial evidence

“At Tenerife Shipyards, we offer our clients a wide range of services for offshore fabrication and maritime sector needs.”

Source: RevenueBase Database · checked Sep 29, 2026
6Partial evidencePuerto Real, SpainHQ checked Sep 29, 202651-20063 contacts →

Partial evidence

“Tincasur Sur es una empresa de servicios con una gran experiencia en los campos Naval, Industrial y OffShore, contando con dos divisiones, una dedicada a la Mecánica y otra a la…”

Source: RevenueBase Database · checked Sep 29, 2026
7Indirect evidenceErandio, SpainHQ checked Sep 29, 202611-5037 contacts →

Indirect evidence

“SINTEMAR is a company specialized in technical solutions for the installation, protection, repair and reliability of industrial and marine assets, with over 65 years of experience…”

Source: RevenueBase Database · checked Sep 29, 2026
8Indirect evidenceLos Barrios, SpainHQ checked Sep 29, 202651-20030 contacts →

Indirect evidence

“Blay Marine Tech SL offers technical marine services and ship repairs as well as auxiliary services for the maritime industry in Spain.”

Source: RevenueBase Database · checked Sep 29, 2026
9Indirect evidenceMazagón, SpainHQ checked Sep 29, 202611-5030 contacts →

Indirect evidence

“AMADESAM S.L is a maritime service company based out of Mazagón-Huelva, Spain.”

Source: RevenueBase Database · checked Sep 29, 2026
10Indirect evidenceCádiz, SpainHQ checked Sep 29, 202611-5022 contacts →

Indirect evidence

“Naval Sector - Ship berths and moorings- Crane Service- Assembly and disassembly of scaffolding (Layher system)- Ship cleaning- Maneuvers of large tonnage parts (change of axles…”

Source: RevenueBase Database · checked Sep 29, 2026
11Indirect evidenceAlgeciras, SpainHQ checked Sep 29, 2026201-50018 contacts →

Indirect evidence

“Innovative, Safe, Operational 24/7, Efficient, Adaptable, High Technical Quality.”

Source: RevenueBase Database · checked Sep 29, 2026
12Indirect evidenceParets, SpainHQ checked Sep 29, 202651-20011 contacts →

Indirect evidence

“La experiencia familiar de más de 30 años en el sector de las instalaciones petroleras, nos llevó a crear en 1998 Fort Instalaciones Petroleras, una empresa de servicios en el…”

Source: RevenueBase Database · checked Sep 29, 2026
13Partial evidenceSanta Cruz De Tenerife, SpainHQ checked Sep 29, 202611-5011 contacts →

Partial evidence

“At Hidramar International we help to avoid downtimes to our clients providing cost-effective and safe high-quality assets maintenance in the Atlantic Ocean while they keep…”

Source: RevenueBase Database · checked Sep 29, 2026
14Partial evidenceLos Barrios, SpainHQ checked Sep 29, 202611-508 contacts →

Partial evidence

“Global Underwater Services SL is a professional commercial local diving company with more than 25 years of experience providing underwater maintenance services and repairs with…”

Source: RevenueBase Database · checked Sep 29, 2026
15Indirect evidenceBarcelona, SpainHQ checked Sep 29, 202611-506 contacts →

Indirect evidence

“UNISERVICE 98 SL is a facilities services company based out of PS JOAN DE BORBO,144-146, LOCALES, BARCELONA, Spain.”

Source: RevenueBase Database · checked Sep 29, 2026

Showing 15 of 64 offshore platform maintenance companies based in Spain

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Offshore platform maintenance companies based in Spain at a glance

As of Sep 29, 2026
9.2%Verified-email coverage
26.3Average contacts per company
11-50Median size (employees)
12.5%Largest-city concentration · Algeciras
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
17
11-50
27
51-200
12
201-500
6
501-1,000
1
1,001-5,000
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 64 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 offshore platform maintenance 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 “offshore platform maintenance 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 offshore platform maintenance 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 offshore platform maintenance 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, 155 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 29, 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 offshore platform maintenance 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 offshore platform maintenance companies are there based in Spain?

RevenueBase identified 64 offshore platform maintenance 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?

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

Which city has the most offshore platform maintenance companies?

Algeciras leads with 8 headquartered companies, followed by Cadiz (4) and Las Palmas De Gran Canaria (4).

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 155 verified decision-maker contacts tracked across these 64 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 29, 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.