Company lists · Data refreshed October 2026

Top 25 Downstream refining contractors based in Spain

RevenueBase identified 272 company matches for downstream refining contractors associated with Spain as of October 2026 and tracks 19,746 professional contacts across them, including 3,096 with verified work emails. Madrid is the largest hub.

This list covers company matches for downstream refining contractors associated with Spain, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 11, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 11, 2026 How this list was built
272Companies
19,746Contacts tracked
3,096Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest downstream refining contractors based in Spain

Ranked by team size
Top 25 of 272 company matches for downstream refining contractors based in Spain, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 11, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchMadrid, SpainHQ recorded Oct 11, 202610001+11,378 contacts →

Exact match

“TR is an international general contractor engaged in the engineering and construction of industrial facilities in the fields of-Oil & Gas -Refining & Petrochemical -Power…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
2Exact match11510 Puerto Real, SpainHQ recorded Oct 11, 20261,001-5,0001,538 contacts →

Exact match

“Founded in 1972, Dragados Offshore S.A.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
3Exact matchBilbao, SpainHQ recorded Oct 11, 20261,001-5,000720 contacts →

Exact match

“NERVION INDUSTRIES is a business group dedicated to industrial services and applied engineering, providing services in strategic sectors.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
4Exact matchErandio/ Altzaga, SpainHQ recorded Oct 11, 20261,001-5,000705 contacts →

Exact match

“TAMOIN, fundada en 1956, es en la actualidad una sociedad empresarial de GTM Grupo, en constante evolución hacia la especialización en servicios industriales.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
5Exact matchMadrid, SpainHQ recorded Oct 11, 20261,001-5,000506 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
6Exact matchMadrid, SpainHQ recorded Oct 11, 2026501-1,000393 contacts →

Exact match

“Intecsa Industrial is a Spanish engineering company with more than 50 years experience in Engineering, “Turn-key” execution of industrial plants and supply of technological…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
7Exact matchMadrid, SpainHQ recorded Oct 11, 2026501-1,000249 contacts →

Exact match

“Siemsa es un operador independiente que proporciona servicios para el sector de la Energía, Industria y Oil and Gas, sistemas de control y analizadores de proceso, así como…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
8Exact matchBergondo, SpainHQ recorded Oct 11, 2026201-500215 contacts →

Exact match

“TEIGA TMI es una empresa con más de 40 años de experiencia, que ofrece soluciones y servicios de ingeniería; montaje y mantenimiento mecánico-eléctrico; con implantación en…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
9Exact matchUrduliz, SpainHQ recorded Oct 11, 2026201-500158 contacts →

Exact match

“LOINTEK is a private company firmly established in the international market of engineering, supply, manufacture and service in the sector of equipment for the industry of the…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
10Exact matchVitoria-gasteiz, SpainHQ recorded Oct 11, 202651-200148 contacts →

Exact match

“NOVARGI GROUP, is a global integral engineering solutions contractor for the Energy and Fertilizer Industry.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
11Exact matchCartagena, SpainHQ recorded Oct 11, 2026201-500140 contacts →

Exact match

“Since 1990, Techno Pro Hispania (TPH) and the FIVA Group have worked closely with their clients in the development of industrial, naval, energy, and petrochemical engineering…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
12Exact matchGijón, SpainHQ recorded Oct 11, 2026201-500127 contacts →

Exact match

“Founded in 1993, IDESA has grown to become one of the most currently recognized and respected companies in the design, fabrication and supply of static and modular equipment…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
13Exact matchErandio, SpainHQ recorded Oct 11, 202651-200120 contacts →

Exact match

“Founded in 1979, EIA21 was chartered with the aim of responding to the engineering needs of high growth industrial companies, soon achieved a strong footprint in this area…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
14Exact matchSeville, SpainHQ recorded Oct 11, 202651-200106 contacts →

Exact match

“AZCATEC It is the tool for a group of well-organized professional engineers and experts in the development of industrial plants, energy and environmental engineering have to…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
15Exact matchMadrid, SpainHQ recorded Oct 11, 2026201-500103 contacts →

Exact match

“Engineering company based in Madrid, Spain with over 40 years of experience in the fields of petrochemical and industrial engineering, conventional and nuclear power plants…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
16Exact matchBetanzos, SpainHQ recorded Oct 11, 2026201-50070 contacts →

Exact match

“INELTRON es una empresa multinacional especializada en la prestación de servicios de ingeniería, construcción, puesta en marcha, operación y mantenimiento en sistemas de…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
17Exact matchAbrera, SpainHQ recorded Oct 11, 202651-20069 contacts →

Exact match

“En LEDR Ingeniería y Servicios SL no solo diseñamos sobre el plano, nuestra verdadera fuerza reside en la capacidad de ejecutar proyectos desde el concepto inicial hasta la puesta…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
18Exact matchGijón, SpainHQ recorded Oct 11, 202651-20063 contacts →

Exact match

“COSERMO ESPAÑOLA S.L Passion for perfection.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
19Exact matchMadrid, SpainHQ recorded Oct 11, 202651-20063 contacts →

Exact match

“THERMAN Mantenimiento Industrial, S.L.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
20Exact matchBarcelona, SpainHQ recorded Oct 11, 202651-20057 contacts →

Exact match

“ENG Aguilar y Salas, s.a.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
21Exact matchDerio, SpainHQ recorded Oct 11, 202651-20049 contacts →

Exact match

“Empresa perteneciente al entorno mercantil de Serveo Servicios Ingeniería, Servicios de Montajes, Mantenimiento, origen en 1943, la Siderurgia "Sociedad Anónima Basconia" Desde…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
22Exact matchBarcelona, SpainHQ recorded Oct 11, 202611-5045 contacts →

Exact match

“Opex Energy is an engineering and technical assistance company.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
23Exact matchPuertollano, SpainHQ recorded Oct 11, 202651-20039 contacts →

Exact match

“GESINOM Ingeniería es una empresa especializada en ofrecer soluciones de ingeniería industrial con más de 18 años de experiencia en el sector.”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
24Exact matchAvilés, SpainHQ recorded Oct 11, 202651-20038 contacts →

Exact match

“Iberastur es una empresa especializada en ingeniería industrial, reconocida por ofrecer soluciones técnicas avanzadas para optimizar la eficiencia y el rendimiento de…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase
25Exact matchCórdoba, SpainHQ recorded Oct 11, 2026201-50038 contacts →

Exact match

“RCIndustrial, con sede en Córdoba (España), es una empresa dedicada a la ejecución de proyectos de fabricación y montaje industrial, así como al mantenimiento de instalaciones…”

Recorded in the RevenueBase company graph · Oct 11, 2026 · View company records in RevenueBase

Showing 25 of 272 downstream refining contractors based in Spain

See the full list, filter by size, metro and specialty, and access 3,096 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Downstream refining contractors based in Spain at a glance

As of Oct 11, 2026
15.7%Verified-email coverage
72.6Average contacts per company
11-50Median size (employees)
12.1%Largest-city concentration · Madrid
Oct 11, 2026Page data refreshed

Companies by employee count

1-10
89
11-50
108
51-200
49
201-500
15
501-1,000
4
1,001-5,000
6
10001+
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 272 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with Spain whose business descriptions match “downstream refining contractors” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 3,096 professional contacts with verified work emails across the full matched dataset. 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 October 11, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Downstream refining contractors by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “downstream refining contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many downstream refining contractors are there based in Spain?

RevenueBase identified 272 company matches for downstream refining contractors associated with Spain as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Tecnicas Reunidas tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most downstream refining contractors?

Madrid leads with 33 company records, followed by Barcelona (14) and Seville (9).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 3,096 professional contacts with verified work emails tracked across these 272 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 11, 2026.

Ready to reach these companies? Verified emails and direct dials for all 272 downstream refining contractors based in Spain. Start with a free account, no credit card.

Download this list →

Related lists

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 SmartSearch, 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.