These Madrid-based companies primarily operate in environmental services, utilities, and infrastructure. They include large established groups such as FCC, a global citizen services company with over a century of experience, and Grupo Cobra, which specializes in industrial engineering and renewable energy. Other significant players are ACCIONA, focused on regenerative infrastructure and a low-carbon economy, and Grupo EULEN, providing specialized facility services including environmental solutions.
A notable characteristic of these companies is their extensive international reach, with many operating in dozens of countries. This suggests a strong export orientation for environmental and infrastructure expertise from Madrid. Additionally, there is a mix of long-standing firms like FCC (founded 1900) and Canal de Isabel II (founded 1851), alongside newer entrants such as PreZero España (founded 2021).
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 71,000 | ||||
| 2 |
ACCIONAacciona.com
The company specializes in developing regenerative infrastructure with a focus on sustainability, leading the transition to a low-carbon economy with a positive impact on people and the planet |
33,828 | |||
| 3 |
Grupo EULENeulen.com
Provides specialized outsourced services globally, including facility management, cleaning, security, maintenance, environmental, healthcare, and HR solutions for businesses and public administrations. |
20,585 | |||
| 4 |
PreZero Españaprezero.es
The company provides environmentally friendly solutions for waste management and circular economy, serving over 980 municipalities in Spain and Portugal |
14,600 | |||
| 5 |
Grupo Tragsatragsa.es
Provides engineering, technical assistance, and execution of projects for public administrations in agriculture, environment, and rural development sectors. |
12,239 | |||
| 6 |
Elecnor Groupgrupoelecnor.com
Global corporation specializing in engineering, construction, sustainable projects, infrastructure investments, renewable energy, asset management, and energy transmission across 50 countries. |
10,383 | |||
| 7 | 8,854 | ||||
| 8 |
CLECE, S.A.clece.es
A leading company offering a wide range of services such as social, educational, environmental, and logistic services with a focus on social inclusion |
8,824 | |||
| 9 |
ILUNIONilunion.com
A group of companies focused on creating a more accessible world, reinventing themselves daily to compete and move forward |
8,198 | |||
| 10 |
Urbaserurbaser.com
A global sustainability-focused company providing environmental management services to over 50 million people in 20 countries through a large network of employees and subsidiaries |
4,472 | |||
| 11 |
Aqualiaaqualia.com
Aqualia provides water management services to municipalities and private entities in 18 countries, serving 452 million people with sustainable solutions |
2,316 | |||
| 12 |
FCC Medio Ambientefccma.com
A global leader in environmental services, offering waste collection, recycling, energy recovery, cleaning, maintenance, and industrial waste treatment solutions worldwide |
2,061 | |||
| 13 |
ISOLUX CORSANisoluxcorsan.com
A global leader in energy, water, environmental, road, and railways infrastructure, with expertise in energy T&D, solar projects, power plant construction, and parking concessions |
1,746 | |||
| 14 |
Canal de Isabel IIcanaldeisabelsegunda.es
A public company in Madrid managing the water cycle, ensuring supply and quality, while contributing to environmental protection and using advanced technology |
1,475 | |||
| 15 |
VALORIZA SERVICIOS MEDIOAMBIENTALES SAvalorizasm.com
Specialized in providing environmental services with a focus on efficiency and sustainability in all processes |
1,451 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
ImesApi / Api movilidadimesapi.es
A diversified firm providing services in road conservation, environment, mobility, rehabilitation, facility management, and services with a focus on expertise and new technologies |
612 | |||
| 17 |
Onet Iberiaonet.es
Provider of innovative solutions in business services including cleaning, maintenance, logistics, waste management, and personal services, with a strong European presence |
524 | |||
| 18 |
Terratestterratest.com
International Construction Group specializing in Special Foundations, Soil Improvement, Microtunneling, and Environmental Solutions with comprehensive geotechnical services since 1959 |
472 | |||
| 19 |
GS Inima Environmentinima.com
A global leader in the water sector, specializing in all project phases from design to maintenance, with over 200 completed projects worldwide |
461 | |||
| 20 |
Grupo Cementos Portland Valderrivasvalderrivas.es
A multinational company leading in cement production, with advanced technologies for resource optimization and environmental respect Operating in Spain, USA, Tunisia, UK, and Netherlands |
442 | |||
| 21 |
ENUSA Industrias Avanzadas, S.A., S.M.E.enusa.es
Design, manufacture, and supply of nuclear fuel, engineering services for nuclear plants, environmental restoration, and landscape integration services. |
430 | |||
| 22 |
Edison Next Spainedisonnext.es
Edison Next helps companies and territories in their ecological transition and decarbonization through a unique platform of services, technology, and expertise |
354 | |||
| 23 |
Europac Groupdssmith.com
Multinational company in the packaging industry, focusing on waste management, forestry, kraftliner, recycled papers, and manufacturing sustainable packaging products |
313 | |||
| 24 |
Talher S.A.talher.com
An environmental services company specializing in gardening, forestry, street cleaning, waste collection, and environmental education Also provides wildlife management services |
312 | |||
| 25 |
Licuas S.A.licuas.es
An innovative, effective, and sustainable company with over 35 years of experience, offering specialized services in construction, civil engineering, and environmental services |
308 | |||
| 26 | 290 | ||||
| 27 |
ECOEMBESecoembes.com
A non-profit organization managing a system for collecting and recycling packaging waste, significantly reducing landfill waste and environmental impact |
283 | |||
| 28 |
Eductradeeductrade.com
Specializing in the development of comprehensive projects in health, education, and other social sectors, Eductrade focuses on enhancing communities |
278 | |||
| 29 |
MIYAmiya-water.com
Global water operator specializing in efficiency solutions, commercial management, and water treatment for utilities serving over 14 million people in Europe, Caribbean, and Africa |
228 | |||
| 30 |
Gestión y Técnicas del Agua S.A. (Gestagua)gestagua.es
Gestagua, part of Saur Group, provides efficient water cycle management services for municipalities in Spain, promoting sustainable prosperity and environmental balance |
188 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.
More company lists in Madrid
- The largest companies in Madrid 2,650
- Multinational companies in Madrid 815
- Retail chains in Madrid 259
- Financial services firms in Madrid 231
- Professional services firms in Madrid 227
- Wellness and Fitness Services companies in Madrid 202
- Critical infrastructure operators in Madrid 169
- Healthcare providers in Madrid 161
- Companies with in-house R&D in Madrid 158
- Companies with a mobile app in Madrid 158
- Consulting firms in Madrid 157
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- Education providers in Madrid 141
- IT Services and IT Consulting companies in Madrid 138
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- Financial Services companies in Madrid 125
- Insurance companies in Madrid 122
- SaaS companies in Madrid 113
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- Manufacturers in Madrid 91
- Public sector organisations in Madrid 90
- Retail Apparel and Fashion companies in Madrid 89
- Corporate groups and holding companies in Madrid 89
- Business Consulting and Services companies in Madrid 80