Company lists · Data refreshed September 2026

Top 18 Critical infrastructure contractors based in Spain

RevenueBase identified 63 company matches for critical infrastructure contractors associated with Spain as of September 2026 and tracks 8,069 professional contacts across them, including 455 with verified work emails. Madrid is the largest hub.

This list covers company matches for critical infrastructure 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 16, 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 16, 2026 How this list was built
63Companies
8,069Contacts tracked
455Verified emails
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The 18 largest critical infrastructure contractors based in Spain

Ranked by team size
Top 18 of 63 company matches for critical infrastructure contractors based in Spain, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 16, 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 Sep 16, 202610001+2,554 contacts →

Exact match

“DRAGADOS, S.A.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
2Exact matchBarcelona, SpainHQ recorded Sep 16, 20265,001-10,0001,315 contacts →

Exact match

“COMSA Corporación is the largest unlisted Spanish group in the infrastructure and engineering sector.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
3Exact matchGetafe, SpainHQ recorded Sep 16, 20261,001-5,000628 contacts →

Exact match

“Insyte Instalaciones inicia su actividad en 1990 como empresa instaladora en el sector eléctrico y de telecomunicaciones.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
4Exact matchMadrid, SpainHQ recorded Sep 16, 20261,001-5,000475 contacts →

Exact match

“En Lantania hacemos realidad grandes infraestructuras de transporte, agua y energía con el entusiasmo de una empresa joven y la solidez que nos aporta la experiencia.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
5Exact matchMadrid, SpainHQ recorded Sep 16, 2026201-500232 contacts →

Exact match

“Elevate your expectations with ACISA, a proud member of the prestigious Aldesa Group, Spain's construction titan.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
6Exact matchMadrid, SpainHQ recorded Sep 16, 20261,001-5,000119 contacts →

Exact match

“We are a comprehensive services company related to infrastructures.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
7Exact matchEl Palmar (murcia), SpainHQ recorded Sep 16, 202651-20092 contacts →

Exact match

“Emurtel es una compañía líder de ingeniería y consultoría multidisciplinar orientada a la gestión integral de proyectos, ofreciendo soluciones de valor añadido en el diseño…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
8Exact matchGranada, SpainHQ recorded Sep 16, 202651-20068 contacts →

Exact match

“Referentes en Construcción de alto valor técnico y Obra Civil | Expertos en Infraestructuras, Edificación, Energía, Obra Hidráulica y Servicios Como parte integral de GRUPO INEXO…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
9Exact matchDonostia - San Sebastián, SpainHQ recorded Sep 16, 202651-20024 contacts →

Exact match

“Somos una compañía de servicios tecnológicos especializada en la aplicación de la tecnología para la operación de infraestructuras de transporte, securización de infraestructuras…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
10Exact matchZaragoza, SpainHQ recorded Sep 16, 202651-20022 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
11Exact matchMálaga, SpainHQ recorded Sep 16, 202611-5017 contacts →

Exact match

“Empresa constructora en Málaga con más de 40 años de experiencia en la realización de proyectos.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
12Exact matchMadrid, SpainHQ recorded Sep 16, 202651-20015 contacts →

Exact match

“Site & Field is a Spanish civil construction, building and industrial company that breaks traditional patterns.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
13Exact matchGranada, SpainHQ recorded Sep 16, 202611-5012 contacts →

Exact match

“UC10 S.A es un Grupo de Construcción y Servicios de Infraestructuras públicas y privadas, civiles y de edificación.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
14Exact matchMadrid, SpainHQ recorded Sep 16, 2026n/a10 contacts →

Exact match

“El Grupo LICUAS somos una empresa innovadora, eficaz y sostenible, con más de 35 años de experiencia en el sector, y que contamos con un equipo humano de más de 1.100…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
15Exact matchMadrid, SpainHQ recorded Sep 16, 202611-509 contacts →

Exact match

“Somos una empresa de ingeniería especializada en infraestructuras de misión crítica.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
16Exact matchBenicarló, SpainHQ recorded Sep 16, 202611-508 contacts →

Exact match

“Arcadio Gregori is a family company wich has been on the market for over 50 years.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
17Exact matchCoslada, SpainHQ recorded Sep 16, 202611-503 contacts →

Exact match

“Sermanred fue constituida en el año 2003 desarrollando su actividad en el sector servicios y construcción logrando en sus últimos años un gran abanico de especialidades como-…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
18Exact matchVilanova I La Geltru, SpainHQ recorded Sep 16, 202611-502 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase

Showing 18 of 63 critical infrastructure contractors based in Spain

See the full list, filter by size, metro and specialty, and access 455 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Critical infrastructure contractors based in Spain at a glance

As of Sep 16, 2026
5.6%Verified-email coverage
128.1Average contacts per company
11-50Median size (employees)
27.0%Largest-city concentration · Madrid
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
8
11-50
24
51-200
15
201-500
2
501-1,000
2
1,001-5,000
8
5,001-10,000
2
10001+
2

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 63 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 “critical infrastructure 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 455 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 16, 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 “critical infrastructure contractors”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many critical infrastructure contractors are there based in Spain?

RevenueBase identified 63 company matches for critical infrastructure 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?

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

Which city has the most critical infrastructure contractors?

Madrid leads with 17 company records, followed by Barcelona (4) and Alcobendas (2).

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 455 professional contacts with verified work emails tracked across these 63 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 16, 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.