The companies listed in Madrid are predominantly large multinational corporations, many founded in the mid-20th century. They operate across diverse sectors, including telecommunications, IT services, and various business and environmental services. Telefónica is a global telecommunications company, while Atento and Konecta specialize in outsourcing and offshoring consulting. FCC is a global citizen services company, and Prosegur focuses on private security solutions. Quirónsalud is a leader in healthcare, and Indra Group provides defense, space, and IT solutions. Many of these companies have a significant global presence, with operations spanning numerous countries.
A notable pattern among these companies is their strong representation in services, particularly business process outsourcing, IT consulting, and infrastructure. This indicates a concentration of expertise in supporting other businesses and public services. Another observation is the prevalence of companies with a long operational history, some founded over a century ago, such as FCC and Quirónsalud, suggesting a mature corporate landscape in Madrid.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Atentoatento.com
Leading provider of CRM and BPO services in Latin America and globally, serving multinational corporations in various industries through multiple channels |
154,000 | |||
| 2 |
Telefónicatelefonica.com
Leading global telecommunications company providing advanced infrastructure, innovative digital and data services, focusing on secure, cutting-edge technology and social impact. |
121,569 | |||
| 3 | 71,000 | ||||
| 4 |
Prosegurprosegur.com
A global leader in private security, offering advanced solutions through five business lines with a strong focus on social responsibility |
67,392 | |||
| 5 |
Konectakonecta.com
Global provider of customer management outsourcing, offering acquisition, retention, support, and collections across multiple industries with advanced digital technologies. |
56,399 | |||
| 6 |
Quirónsaludquironsalud.com
Leader in healthcare in Spain and Europe with over 50,000 professionals and 59 hospitals, focusing on medical research, education, and cutting-edge technology |
50,000 | |||
| 7 |
Indra Groupindragroup.com
Leading multinational providing defense, space, air traffic management, and mobility solutions alongside information technology services, artificial intelligence, cybersecurity, and advanced digital transformation projects. |
39,308 | |||
| 8 |
El Corte Ingléselcorteingles.es
A world leader in large department stores, Spanish distribution, and diverse business formats with a focus on customer service and adaptation |
37,601 | |||
| 9 |
Grupo Cobragrupocobra.com
Global industrial engineering, installation, and maintenance for infrastructure, specializing in energy, networks, specialized installations, integrated projects, and concession assets. |
5,408 | |||
| 10 |
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 | |||
| 11 |
NTT DATA Europe & Latamnttdata.com
Global IT services provider transforming clients through consulting, solutions, and managed services to enable a confident move into the digital future |
31,932 | |||
| 12 |
repsolrepsol.com
A leading player in the oil and gas industry, involved in exploration, production, transformation, development, and marketing of efficient, sustainable energy solutions globally |
26,030 | |||
| 13 |
Amadeusamadeus.com
A company revolutionizing the travel industry by inspiring innovation, partnerships, and responsibility, connecting the travel ecosystem and promoting social and environmental good |
23,625 | |||
| 14 |
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 | |||
| 15 |
Applus+applus.com
A global leader in testing, inspection, and certification services, providing innovative solutions for asset integrity, regulatory compliance, and environmental performance |
20,046 | |||
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 |
Gestampgestamp.com
A multinational company specializing in designing and manufacturing advanced metal components for vehicle manufacturers worldwide, focusing on lighter, safer, and more environmentally friendly products |
17,667 | |||
| 17 |
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 | |||
| 18 |
Universidad Complutense de Madriducm.es
A public university in Madrid offering high-quality education, research opportunities, international collaborations, extensive library resources, diverse cultural activities, and sports facilities |
14,024 | |||
| 19 |
Universidad Autónoma de Madriduam.es
Institution recognized for high-quality research, entrepreneurial capacity, teaching excellence, and social commitment. Actively promotes international exchange and training programs. |
14,000 | |||
| 20 |
Tecnicas Reunidastecnicasreunidas.es
An international general contractor specializing in engineering and construction of industrial facilities in oil & gas, refining, power generation, infrastructures, and energy transition |
12,368 | |||
| 21 |
Grupo Tragsatragsa.es
Provides engineering, technical assistance, and execution of projects for public administrations in agriculture, environment, and rural development sectors. |
12,239 | |||
| 22 |
Iberiaiberia.com
Spain's number-one airline group and Europe-Latin America market leader. Part of IAG Group and Oneworld Alliance, offers best connections to 700 destinations worldwide. |
11,107 | |||
| 23 |
Carrefour Españacarrefour.es
A company dedicated to leading the food transition towards healthier, sustainable products at affordable prices, with a focus on employee development and social responsibility |
10,886 | |||
| 24 |
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 | |||
| 25 |
Sanitascorporativo.sanitas.es
The company is dedicated to promoting healthier and happier lives through an integrated healthcare model, including insurance, hospitals, rehabilitation centers, and dental clinics |
10,198 | |||
| 26 |
Minor Hotels Europe and Americascareer2.successfactors.eu
Operating international hotels and resorts across eight brands alongside luxury residences, private jets, restaurants, wellness spas, river cruises and premium rail journeys. |
10,009 | |||
| 27 |
Endesaendesa.com
Leaders in electricity and natural gas sector. Providing services to millions of clients. Core business is production, transportation, distribution and commercialization of electric power. |
9,800 | |||
| 28 |
FCC Construcciónfccco.es
Industry leader with over 120 years of experience in engineering and construction, specializing in international infrastructure projects to enhance quality of life |
9,500 | |||
| 29 | 8,854 | ||||
| 30 |
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 | |||
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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 11, 2026.
More company lists in Madrid
- The largest companies in Madrid 2,650
- 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
- IT services companies in Madrid 155
- Education providers in Madrid 141
- IT Services and IT Consulting companies in Madrid 138
- Software Development companies in Madrid 129
- Financial Services companies in Madrid 125
- Insurance companies in Madrid 122
- SaaS companies in Madrid 113
- Hotel and hospitality groups in Madrid 104
- 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
- Marketing and communications agencies in Madrid 79
The same list elsewhere in Spain
- Multinational companies in Spain 2,706
- Multinational companies in Community of Madrid 1,059
- Multinational companies in Catalonia 680
- Multinational companies in Valencian Community 196
- Multinational companies in Andalusia 176
- Multinational companies in Basque Country 117
- Multinational companies in Balearic Islands 77
- Multinational companies in Aragon 50
- Multinational companies in Galicia 41
- Multinational companies in Region of Murcia 40
- Multinational companies in Navarre 36
- Multinational companies in Canary Islands 25
- Multinational companies in Castile and León 25
- Multinational companies in Barcelona 363
- Multinational companies in Valencia 59
- Multinational companies in Alcobendas 54
- Multinational companies in Palma 52
- Multinational companies in Seville 41
- Multinational companies in Zaragoza 39
- Multinational companies in Pozuelo de Alarcón 27
- Multinational companies in Sant Cugat del Vallès 27
- Multinational companies in Málaga 26