Company lists · Data refreshed September 2026

Top 25 Refinery expansion contractors based in Spain

Name: Refinery expansion contractors based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 197 companies tracked

RevenueBase identified 197 company matches for refinery expansion contractors associated with Spain as of September 2026 and tracks 18,878 professional contacts across them, including 3,194 with verified work emails. Madrid is the largest hub.

This list covers company matches for refinery expansion 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 September 17, 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 Sep 17, 2026 How this list was built

197Companies

18,878Contacts tracked

3,194Verified emails

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The 25 largest refinery expansion contractors based in Spain

Ranked by team size

Top 25 of 197 company matches for refinery expansion contractors based in Spain, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Tecnicas Reunidas	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	10001+	10,588 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 · Sep 17, 2026 · View company records in RevenueBase
2	Dragados Offshore	Exact match	11510 Puerto Real, SpainHQ recorded Sep 17, 2026	1,001-5,000	1,348 contacts →
	Exact match “Founded in 1972, Dragados Offshore S.A.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	Nervion Industries, Engineering & Services, S.L	Exact match	Bilbao, SpainHQ recorded Sep 17, 2026	1,001-5,000	681 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 · Sep 17, 2026 · View company records in RevenueBase
4	Tamoin	Exact match	Erandio/ Altzaga, SpainHQ recorded Sep 17, 2026	1,001-5,000	630 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 · Sep 17, 2026 · View company records in RevenueBase
5	Grupo Masa	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	1,001-5,000	450 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 · Sep 17, 2026 · View company records in RevenueBase
6	Intecsa Industrial	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	501-1,000	372 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 · Sep 17, 2026 · View company records in RevenueBase
7	Df-Duro Felguera	Exact match	Gijón, SpainHQ recorded Sep 17, 2026	1,001-5,000	301 contacts →
	Exact match “Duro Felguera is a global company based in Asturias.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Técnicas Reunidas Initec	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	501-1,000	276 contacts →
	Exact match “Contratista general con actividad internacional que se dedica a la ingeniería, diseño y construcción de todo tipo de instalaciones industriales para un amplio espectro de clientes…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Teiga TMI	Exact match	Bergondo, SpainHQ recorded Sep 17, 2026	201-500	204 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 · Sep 17, 2026 · View company records in RevenueBase
10	Lointek	Exact match	Urduliz, SpainHQ recorded Sep 17, 2026	201-500	140 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 · Sep 17, 2026 · View company records in RevenueBase
11	Techno PRO Hispania	Exact match	Cartagena, SpainHQ recorded Sep 17, 2026	201-500	128 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 · Sep 17, 2026 · View company records in RevenueBase
12	Novargi	Exact match	Vitoria-gasteiz, SpainHQ recorded Sep 17, 2026	51-200	123 contacts →
	Exact match “NOVARGI GROUP, is a global integral engineering solutions contractor for the Energy and Fertilizer Industry.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	Eia21	Exact match	Erandio, SpainHQ recorded Sep 17, 2026	51-200	113 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 · Sep 17, 2026 · View company records in RevenueBase
14	Azcatec Tecnología E Ingeniería	Exact match	Seville, SpainHQ recorded Sep 17, 2026	51-200	98 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 · Sep 17, 2026 · View company records in RevenueBase
15	Diseprosa	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	51-200	92 contacts →
	Exact match “DISEÑOS Y PROYECTOS REUNIDOS, S.A.(DISEPROSA), fundada en Madrid en 1986 y dedicada al desarrollo y prestación de servicios de Ingeniería y Consultoría, Dirección y Supervisión de…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Dynatec, S.A	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	201-500	88 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 · Sep 17, 2026 · View company records in RevenueBase
17	Premonor	Exact match	Bergondo, SpainHQ recorded Sep 17, 2026	51-200	79 contacts →
	Exact match “Premonor, S.A.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Cosermo	Exact match	Gijón, SpainHQ recorded Sep 17, 2026	51-200	65 contacts →
	Exact match “COSERMO ESPAÑOLA S.L Passion for perfection.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Ledr Ingenieria Y Servicios SL	Exact match	Abrera, SpainHQ recorded Sep 17, 2026	51-200	63 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 · Sep 17, 2026 · View company records in RevenueBase
20	Ineltron Solutions	Exact match	Betanzos, SpainHQ recorded Sep 17, 2026	201-500	58 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 · Sep 17, 2026 · View company records in RevenueBase
21	Design And Projects International, C.A. Dapin	Exact match	San Sebastián De Los Reyes, SpainHQ recorded Sep 17, 2026	201-500	58 contacts →
	Exact match “Design and Projects International, C.A.(DAPIN, C.A.), is a thriving engineering and construction company in the Oil & Gas / Energy industry positioned in natural gas, refining…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Grupo Cartago Ingenieros	Exact match	Madrid, SpainHQ recorded Sep 17, 2026	51-200	56 contacts →
	Exact match “Grupo CARTAGO desarrolla servicios de ingeniería y de dirección y supervisión de obra en la construcción y puesta en marcha de plantas industriales, petroquímicas, centrales…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23	Aguilar Y Salas S.A	Exact match	Barcelona, SpainHQ recorded Sep 17, 2026	51-200	49 contacts →
	Exact match “ENG Aguilar y Salas, s.a.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	Iberastur Ingeniería	Exact match	Avilés, SpainHQ recorded Sep 17, 2026	51-200	48 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 · Sep 17, 2026 · View company records in RevenueBase
25	Jauregui Ingeniería Y Servicios Industriales S.A Perteneciente AL Entorno Mercantil Serveo Servicios	Exact match	Derio, SpainHQ recorded Sep 17, 2026	51-200	48 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 · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “refinery expansion contractors”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 197 refinery expansion contractors based in Spain

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Refinery expansion contractors based in Spain at a glance

As of Sep 17, 2026

16.9%Verified-email coverage

95.8Average contacts per company

11-50Median size (employees)

15.2%Largest-city concentration · Madrid

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 197 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 “refinery expansion 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 3,194 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 September 17, 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.

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 “refinery expansion contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many refinery expansion contractors are there based in Spain?

RevenueBase identified 197 company matches for refinery expansion contractors associated with Spain as of September 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 refinery expansion contractors?

Madrid leads with 30 company records, followed by Barcelona (7) and Seville (6).

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 3,194 professional contacts with verified work emails tracked across these 197 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 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 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.