Company lists · Data refreshed September 2026

Top 25 Infrastructure conglomerates based in Spain

Name: Infrastructure conglomerates based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 672 companies tracked

RevenueBase identified 672 infrastructure conglomerates headquartered in Spain as of September 2026 and tracks 47,548 professional contacts across them, including 3,423 with verified work emails. Madrid is the largest hub.

This list covers infrastructure conglomerates 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 20, 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 20, 2026 86% judged on-target in blind review

672Companies

47,548Contacts tracked

3,423Verified emails

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The 25 largest infrastructure conglomerates based in Spain

Ranked by team size

Top 25 of 672 infrastructure conglomerates based in Spain, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure conglomerates: 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	Ohla Group	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	10001+	3,139 contacts →
	Indirect evidence “Talent, innovation and excellence define each one of the projects executed by OHLA.” Source: RevenueBase Database · checked Sep 20, 2026
2	Dragados SA	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	10001+	2,554 contacts →
	Indirect evidence “DRAGADOS, S.A.” Source: RevenueBase Database · checked Sep 20, 2026
3	TYPSA	Partial evidence	San Sebastian De Los Reyes, SpainHQ checked Sep 20, 2026	1,001-5,000	2,422 contacts →
	Partial evidence “TYPSA is an independent consulting and engineering services group, and a leader in infrastructure, energy, environmental and city solutions.” Source: RevenueBase Database · checked Sep 20, 2026
4	Isolux Corsan	Partial evidence	Madrid, SpainHQ checked Sep 20, 2026	5,001-10,000	1,649 contacts →
	Partial evidence “Isolux is a global benchmark in energy, water and environmental, road and railways infrastructure with presence in more than 35 countries on four continents.” Source: RevenueBase Database · checked Sep 20, 2026
5	Comsa Corporación	Partial evidence	Barcelona, SpainHQ checked Sep 20, 2026	5,001-10,000	1,315 contacts →
	Partial evidence “COMSA Corporación is the largest unlisted Spanish group in the infrastructure and engineering sector.” Source: RevenueBase Database · checked Sep 20, 2026
6	Eptisa	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	1,001-5,000	939 contacts →
	Indirect evidence “We are a multinational company specialised in engineering, consultancy, information technologies and institutional, economic and social development with over 60 years of…” Source: RevenueBase Database · checked Sep 20, 2026
7	TPF Ingeniería	Partial evidence	Madrid, SpainHQ checked Sep 20, 2026	501-1,000	746 contacts →
	Partial evidence “TPF INGENIERÍA is one of the leading engineering companies in Spain, truly committed to innovation and excellence in all aspects of infrastructure development.” Source: RevenueBase Database · checked Sep 20, 2026
8	Copisa Constructora	Indirect evidence	L’hospitalet De Llobregat, SpainHQ checked Sep 20, 2026	1,001-5,000	729 contacts →
	Indirect evidence “COPISA es un grupo empresarial con más de 65 años de experiencia, líder en construcción sostenible en el ámbito de las infraestructuras, la construcción industrial, la…” Source: RevenueBase Database · checked Sep 20, 2026
9	Grupo Azvi	Indirect evidence	Sevilla, SpainHQ checked Sep 20, 2026	1,001-5,000	674 contacts →
	Indirect evidence “Somos un grupo empresarial innovador, diversificado, internacionalizado, con sólidos valores que atesora una experiencia centenaria y estamos orgullosos de nuestro gran equipo…” Source: RevenueBase Database · checked Sep 20, 2026
10	Grupo Lantania	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	1,001-5,000	475 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 20, 2026
11	Prointec	Indirect evidence	San Fernando De Henares, SpainHQ checked Sep 20, 2026	501-1,000	458 contacts →
	Indirect evidence “Somos un referente internacional en ingeniería, arquitectura y consultoría de infraestructuras, urbanismo y medio ambiente.” Source: RevenueBase Database · checked Sep 20, 2026
12	S.A. DE Obras Y Servicios, Copasa	Indirect evidence	Galicia, SpainHQ checked Sep 20, 2026	501-1,000	429 contacts →
	Indirect evidence “S.A.” Source: RevenueBase Database · checked Sep 20, 2026
13	Pavasal S.A	Indirect evidence	Valencia, SpainHQ checked Sep 20, 2026	501-1,000	418 contacts →
	Indirect evidence “PAVASAL es una empresa constructora dedicada a la conservación y construcción de obra civil.” Source: RevenueBase Database · checked Sep 20, 2026
14	Rover Grupo	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	501-1,000	411 contacts →
	Indirect evidence “Bienvenido a Rover Grupo!” Source: RevenueBase Database · checked Sep 20, 2026
15	Copcisa	Indirect evidence	Barcelona, SpainHQ checked Sep 20, 2026	501-1,000	399 contacts →
	Indirect evidence “Copcisa is a construction company.” Source: RevenueBase Database · checked Sep 20, 2026
16	Isastur	Indirect evidence	Llanera, SpainHQ checked Sep 20, 2026	1,001-5,000	371 contacts →
	Indirect evidence “El holding ISASTUR está integrado por un conjunto de empresas con distintas actividades que por su tradición y experiencia están fundamentalmente vinculadas con el sector de la…” Source: RevenueBase Database · checked Sep 20, 2026
17	Cintra, A Ferrovial Company	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	1,001-5,000	343 contacts →
	Indirect evidence “Efficient and innovative solutions to meet global mobility needs.” Source: RevenueBase Database · checked Sep 20, 2026
18	WSP EN España	Indirect evidence	Santander, SpainHQ checked Sep 20, 2026	501-1,000	328 contacts →
	Indirect evidence “WSP is one of the world's leading companies in the development of professional engineering services.” Source: RevenueBase Database · checked Sep 20, 2026
19	Carbonell Figueras	Indirect evidence	Tarragona, SpainHQ checked Sep 20, 2026	1,001-5,000	319 contacts →
	Indirect evidence “Somos un grupo global líder en construcción con más de 50 años de experiencia, especializado en obra industrial, edificación y obra civil.” Source: RevenueBase Database · checked Sep 20, 2026
20	Lanco Infratech Limited	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	1,001-5,000	314 contacts →
	Indirect evidence “LANCO INFRATECH LIMITED is an oil and energy company based out of Calle Laguna del Marquesado Nª 19, Nave 16 Edificio Adriana 1ª Planta, Polígono Industrial La Resina…” Source: RevenueBase Database · checked Sep 20, 2026
21	Systra Ardanuy Ingeniería S.A.U	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	201-500	300 contacts →
	Indirect evidence “SYSTRA Ardanuy, founded in 1992, is an international engineering consulting firm specialising in studies, project design, construction management, safety engineering (ISA), and…” Source: RevenueBase Database · checked Sep 20, 2026
22	CHM Infraestructuras	Indirect evidence	Alicante, SpainHQ checked Sep 20, 2026	201-500	293 contacts →
	Indirect evidence “At CHM Obras e Infraestructuras our track record in the sector makes us a benchmark company.” Source: RevenueBase Database · checked Sep 20, 2026
23	Grupo Sanjose	Indirect evidence	Tres Cantos, SpainHQ checked Sep 20, 2026	1,001-5,000	287 contacts →
	Indirect evidence “SANJOSE is a listed, solid and diversified business Group.” Source: RevenueBase Database · checked Sep 20, 2026
24	Autopistas, An Abertis Company	Indirect evidence	Barcelona, SpainHQ checked Sep 20, 2026	1,001-5,000	278 contacts →
	Indirect evidence “Somos una compañía cercana que ofrece seguridad y servicio a sus clientes En Autopistas trabajamos para que nuestros clientes disfruten de sus viajes.” Source: RevenueBase Database · checked Sep 20, 2026
25	Esteyco	Indirect evidence	Madrid, SpainHQ checked Sep 20, 2026	201-500	268 contacts →
	Indirect evidence “Desde 1970 ESTEYCO ha desarrollado internacionalmente más de 1.300 estudios y proyectos.” Source: RevenueBase Database · checked Sep 20, 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: infrastructure conglomerates. 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 infrastructure conglomerates.
Partial evidence: Its own public description names part of infrastructure conglomerates, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure conglomerates. 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 25 of 672 infrastructure conglomerates based in Spain

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Infrastructure conglomerates based in Spain at a glance

As of Sep 20, 2026

7.2%Verified-email coverage

70.8Average contacts per company

11-50Median size (employees)

22.8%Largest-city concentration · Madrid

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

164

11-50

258

51-200

123

201-500

501-1,000

1,001-5,000

5,001-10,000

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 672 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 infrastructure conglomerates, 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 “infrastructure conglomerates”. 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 infrastructure conglomerates), 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 infrastructure conglomerates, 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, 3,423 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 20, 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.

Infrastructure conglomerates by metro

Infrastructure conglomerates in Madrid153
Infrastructure conglomerates in Barcelona38

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 infrastructure conglomerates, 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 infrastructure conglomerates are there based in Spain?

RevenueBase identified 672 infrastructure conglomerates 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?

Ohla Group, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most infrastructure conglomerates?

Madrid leads with 153 headquartered companies, followed by Barcelona (38) and Valencia (23).

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 3,423 verified decision-maker contacts tracked across these 672 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 20, 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.