This selection of Madrid companies with in-house R&D includes large corporations and established firms across diverse sectors. Key players include Telefónica, a global telecommunications company; Quirónsalud, a leader in healthcare; Indra Group, focused on defense, space, and IT solutions; and ACCIONA, specializing in regenerative infrastructure. NTT DATA Europe & Latam provides global IT services, while Repsol is prominent in oil and gas.
The data reveals a strong concentration of headquarters in Madrid, indicating the city's role as a central hub for these large entities. The companies span industries such as telecommunications, healthcare, defense, utilities, IT services, and energy, reflecting a broad spectrum of technological and industrial development within the capital.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
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 | |||
| 2 |
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 | |||
| 3 |
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 | |||
| 4 |
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 | |||
| 5 |
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 | |||
| 6 |
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 | |||
| 7 |
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 | |||
| 8 |
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 | |||
| 9 |
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 | |||
| 10 |
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 | |||
| 11 |
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 | |||
| 12 |
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 | |||
| 13 |
Grupo Tragsatragsa.es
Provides engineering, technical assistance, and execution of projects for public administrations in agriculture, environment, and rural development sectors. |
12,239 | |||
| 14 |
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 | |||
| 15 | 8,620 | ||||
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 |
Insud Pharmainsudpharma.com
Specialized pharmaceutical company with global presence, offering APIs, finished dosage forms, branded medicines, and biotech solutions for human and animal health. |
7,035 | |||
| 17 | 5,743 | ||||
| 18 |
Management Solutionsmanagementsolutions.com
Providing consulting services in strategy, organization, risk management, and technology for financial, energy, and telecommunications sectors worldwide. |
4,798 | |||
| 19 |
OHLA Groupohla-group.com
A global leader in construction, engineering, and development projects, focusing on transport infrastructure, unique buildings, and sustainable progress in various regions worldwide |
4,270 | |||
| 20 |
GRI RENEWABLE INDUSTRIES SLgri.com.es
Manufactures towers and flanges for the wind energy sector globally, including onshore and offshore towers, wind flanges, and wind castings components. |
4,000 | |||
| 21 |
HM Hospitaleshmhospitales.com
Private healthcare group with 54 centers offering specialized hospitals, clinics, and integrated care focused on quality, innovation, and patient wellbeing. |
3,803 | |||
| 22 |
Hospital Universitario La Pazcomunidad.madrid
A public hospital in Madrid that offers specialized healthcare services to patients from Spain and other countries, with a strong reputation in the healthcare industry |
3,225 | |||
| 23 |
Hospital Gregorio Marañónhggm.es
A public hospital in Madrid known for highly trained professionals, teaching and research, technological advancements, and national/international specialty care |
3,146 | |||
| 24 |
Fundación Hospitalariasfundacionhospitalarias.org
Non-profit institution providing specialized care, assistance, and social reintegration for individuals with mental illness, intellectual disabilities, and other conditions worldwide |
3,112 | |||
| 25 |
Navantianavantia.es
Civil and military shipbuilding, ship repairs, turbine manufacturing, engine production, and weapon systems development with centuries of experience. |
2,977 | |||
| 26 |
Universidad Pontificia Comillascomillas.edu
A long-standing university with Jesuit leadership, emphasizing tradition, modern education, and strong connections with business, professional, and social sectors |
2,920 | |||
| 27 |
Exeltisexeltis.com
Innovative global organization in the pharmaceutical sector, committed to improving health through the development and marketing of medicinal products worldwide |
2,659 | |||
| 28 |
Banco de Españabde.es
National central bank and banking supervisor, managing monetary policy, currency issuance, payment systems, and financial system stability in Spain. |
2,585 | |||
| 29 |
Chemochemopharmaceuticals.com
Specializing in pharmaceutical research, development, manufacturing, and sales worldwide, with a focus on innovation and sustainable development to improve health and quality of life |
2,388 | |||
| 30 |
Nippon Sanso Europenippongases.com
A leading European company in industrial and medical gases, offering innovative solutions for various industries, prioritizing safety, quality, and sustainability |
2,106 | |||
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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
- 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 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
- Companies with in-house R&D in Spain 1,067
- Companies with in-house R&D in Catalonia 324
- Companies with in-house R&D in Community of Madrid 245
- Companies with in-house R&D in Valencian Community 102
- Companies with in-house R&D in Basque Country 99
- Companies with in-house R&D in Andalusia 89
- Companies with in-house R&D in Region of Murcia 25
- Companies with in-house R&D in Barcelona 122