# The 30 largest companies with in-house R&D in Madrid
Tamtam tracks 158 companies with in-house R&D headquartered in Madrid. This list ranks the 30 largest by number of employees on LinkedIn, led by Telef贸nica, Quir贸nsalud and Indra Group. Their median headcount is 8,620. Half of them were founded in 1968 or later.
This selection of Madrid companies with in-house R&D includes large corporations and established firms across diverse sectors. Key players include Telef贸nica, a global telecommunications company; Quir贸nsalud, 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.
馃嚜馃嚫 Madrid 路 30 companies 路 Updated Nov 11, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Telef贸nica](https://www.tamtam.ai/c/telefonica) (telefonica.com)
Leading global telecommunications company providing advanced infrastructure, innovative digital and data services, focusing on secure, cutting-edge technology and social impact. | Telecommunications | 馃嚜馃嚫 Madrid | 121,569 | |
| 2 | [Quir贸nsalud](https://www.tamtam.ai/c/quironsalud) (quironsalud.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 | Wellness and Fitness Services | 馃嚜馃嚫 Madrid | 50,000 | 1893 |
| 3 | [Indra Group](https://www.tamtam.ai/c/indra-group) (indragroup.com)
Leading multinational providing defense, space, air traffic management, and mobility solutions alongside information technology services, artificial intelligence, cybersecurity, and advanced digital transformation projects. | Defense and Space Manufacturing | 馃嚜馃嚫 Madrid | 39,308 | |
| 4 | [ACCIONA](https://www.tamtam.ai/c/acciona) (acciona.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 | Utilities | 馃嚜馃嚫 Madrid | 33,828 | |
| 5 | [NTT DATA Europe & Latam](https://www.tamtam.ai/c/ntt-data-europe-and-latam) (nttdata.com)
Global IT services provider transforming clients through consulting, solutions, and managed services to enable a confident move into the digital future | IT Services and IT Consulting | 馃嚜馃嚫 Madrid | 31,932 | |
| 6 | [repsol](https://www.tamtam.ai/c/repsol) (repsol.com)
A leading player in the oil and gas industry, involved in exploration, production, transformation, development, and marketing of efficient, sustainable energy solutions globally | Oil and Gas | 馃嚜馃嚫 Madrid | 26,030 | |
| 7 | [Amadeus](https://www.tamtam.ai/c/amadeus) (amadeus.com)
A company revolutionizing the travel industry by inspiring innovation, partnerships, and responsibility, connecting the travel ecosystem and promoting social and environmental good | IT Services and IT Consulting | 馃嚜馃嚫 Madrid | 23,625 | 1987 |
| 8 | [Applus+](https://www.tamtam.ai/c/applus) (applus.com)
A global leader in testing, inspection, and certification services, providing innovative solutions for asset integrity, regulatory compliance, and environmental performance | Business Consulting and Services | 馃嚜馃嚫 Madrid | 20,046 | |
| 9 | [Gestamp](https://www.tamtam.ai/c/gestamp) (gestamp.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 | Motor Vehicle Manufacturing | 馃嚜馃嚫 Madrid | 17,667 | 1997 |
| 10 | [Universidad Complutense de Madrid](https://www.tamtam.ai/c/universidad-complutense-de-madrid) (ucm.es)
A public university in Madrid offering high-quality education, research opportunities, international collaborations, extensive library resources, diverse cultural activities, and sports facilities | Higher Education | 馃嚜馃嚫 Madrid | 14,024 | 1499 |
| 11 | [Universidad Aut贸noma de Madrid](https://www.tamtam.ai/c/universidad-autonoma-de-madrid) (uam.es)
Institution recognized for high-quality research, entrepreneurial capacity, teaching excellence, and social commitment. Actively promotes international exchange and training programs. | Higher Education | 馃嚜馃嚫 Madrid | 14,000 | 1968 |
| 12 | [Tecnicas Reunidas](https://www.tamtam.ai/c/tecnicas-reunidas) (tecnicasreunidas.es)
An international general contractor specializing in engineering and construction of industrial facilities in oil & gas, refining, power generation, infrastructures, and energy transition | Engineering Services | 馃嚜馃嚫 Madrid | 12,368 | 1960 |
| 13 | [Grupo Tragsa](https://www.tamtam.ai/c/grupo-tragsa) (tragsa.es)
Provides engineering, technical assistance, and execution of projects for public administrations in agriculture, environment, and rural development sectors. | Environmental Services | 馃嚜馃嚫 Madrid | 12,239 | 1977 |
| 14 | [Elecnor Group](https://www.tamtam.ai/c/elecnor-group) (grupoelecnor.com)
Global corporation specializing in engineering, construction, sustainable projects, infrastructure investments, renewable energy, asset management, and energy transmission across 50 countries. | Construction | 馃嚜馃嚫 Madrid | 10,383 | 1958 |
| 15 | [NINGUNO](https://www.tamtam.ai/c/ninguno) (siadde.es)
A technology company with over 20 years of experience providing comprehensive solutions in security systems, telecommunications, software development, and more for various industries | Telecommunications | 馃嚜馃嚫 Madrid | 8,620 | 2026 |
| 16 | [Insud Pharma](https://www.tamtam.ai/c/insud-pharma) (insudpharma.com)
Specialized pharmaceutical company with global presence, offering APIs, finished dosage forms, branded medicines, and biotech solutions for human and animal health. | Pharmaceutical Manufacturing | 馃嚜馃嚫 Madrid | 7,035 | 1977 |
| 17 | [INECO](https://www.tamtam.ai/c/ineco) (ineco.com)
A leading engineering and consulting firm in sustainable mobility and digital transformation, with a global presence and a focus on innovation | Civil Engineering | 馃嚜馃嚫 Madrid | 5,743 | 1968 |
| 18 | [Management Solutions](https://www.tamtam.ai/c/management-solutions) (managementsolutions.com)
Providing consulting services in strategy, organization, risk management, and technology for financial, energy, and telecommunications sectors worldwide. | Business Consulting and Services | 馃嚜馃嚫 Madrid | 4,798 | 2002 |
| 19 | [OHLA Group](https://www.tamtam.ai/c/ohla-group) (ohla-group.com)
A global leader in construction, engineering, and development projects, focusing on transport infrastructure, unique buildings, and sustainable progress in various regions worldwide | Construction | 馃嚜馃嚫 Madrid | 4,270 | 1911 |
| 20 | [GRI RENEWABLE INDUSTRIES SL](https://www.tamtam.ai/c/gri-renewable-industries-sl) (gri.com.es)
Manufactures towers and flanges for the wind energy sector globally, including onshore and offshore towers, wind flanges, and wind castings components. | Semiconductor Manufacturing | 馃嚜馃嚫 Madrid | 4,000 | 2008 |
| 21 | [HM Hospitales](https://www.tamtam.ai/c/hm-hospitales) (hmhospitales.com)
Private healthcare group with 54 centers offering specialized hospitals, clinics, and integrated care focused on quality, innovation, and patient wellbeing. | Wellness and Fitness Services | 馃嚜馃嚫 Madrid | 3,803 | 1989 |
| 22 | [Hospital Universitario La Paz](https://www.tamtam.ai/c/hospital-universitario-la-paz) (comunidad.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 | Hospitals and Health Care | 馃嚜馃嚫 Madrid | 3,225 | 1964 |
| 23 | [Hospital Gregorio Mara帽贸n](https://www.tamtam.ai/c/hospital-gregorio-maranon) (hggm.es)
A public hospital in Madrid known for highly trained professionals, teaching and research, technological advancements, and national/international specialty care | Medical Practices | 馃嚜馃嚫 Madrid | 3,146 | |
| 24 | [Fundaci贸n Hospitalarias](https://www.tamtam.ai/c/fundacion-hospitalarias) (fundacionhospitalarias.org)
Non-profit institution providing specialized care, assistance, and social reintegration for individuals with mental illness, intellectual disabilities, and other conditions worldwide | Hospitals and Health Care | 馃嚜馃嚫 Madrid | 3,112 | 1881 |
| 25 | [Navantia](https://www.tamtam.ai/c/navantia-madrid) (navantia.es)
Civil and military shipbuilding, ship repairs, turbine manufacturing, engine production, and weapon systems development with centuries of experience. | Shipbuilding | 馃嚜馃嚫 Madrid | 2,977 | |
| 26 | [Universidad Pontificia Comillas](https://www.tamtam.ai/c/universidad-pontificia-comillas) (comillas.edu)
A long-standing university with Jesuit leadership, emphasizing tradition, modern education, and strong connections with business, professional, and social sectors | Higher Education | 馃嚜馃嚫 Madrid | 2,920 | 1890 |
| 27 | [Exeltis](https://www.tamtam.ai/c/exeltis) (exeltis.com)
Innovative global organization in the pharmaceutical sector, committed to improving health through the development and marketing of medicinal products worldwide | Pharmaceutical Manufacturing | 馃嚜馃嚫 Madrid | 2,659 | 2003 |
| 28 | [Banco de Espa帽a](https://www.tamtam.ai/c/banco-de-espana) (bde.es)
National central bank and banking supervisor, managing monetary policy, currency issuance, payment systems, and financial system stability in Spain. | Banking | 馃嚜馃嚫 Madrid | 2,585 | 1782 |
| 29 | [Chemo](https://www.tamtam.ai/c/chemo) (chemopharmaceuticals.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 | Pharmaceutical Manufacturing | 馃嚜馃嚫 Madrid | 2,388 | 1977 |
| 30 | [Nippon Sanso Europe](https://www.tamtam.ai/c/nippon-sanso-europe) (nippongases.com)
A leading European company in industrial and medical gases, offering innovative solutions for various industries, prioritizing safety, quality, and sustainability | Chemical Manufacturing | 馃嚜馃嚫 Madrid | 2,106 | |
## 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](https://www.tamtam.ai/l/largest-companies-madrid) (2,650)
- [Multinational companies in Madrid](https://www.tamtam.ai/l/multinational-companies-madrid) (815)
- [Retail chains in Madrid](https://www.tamtam.ai/l/retail-chains-madrid) (259)
- [Financial services firms in Madrid](https://www.tamtam.ai/l/financial-services-firms-madrid) (231)
- [Professional services firms in Madrid](https://www.tamtam.ai/l/professional-services-firms-madrid) (227)
- [Wellness and Fitness Services companies in Madrid](https://www.tamtam.ai/l/wellness-and-fitness-services-companies-madrid) (202)
- [Critical infrastructure operators in Madrid](https://www.tamtam.ai/l/critical-infrastructure-operators-madrid) (169)
- [Healthcare providers in Madrid](https://www.tamtam.ai/l/healthcare-providers-madrid) (161)
- [Companies with a mobile app in Madrid](https://www.tamtam.ai/l/companies-with-mobile-app-madrid) (158)
- [Consulting firms in Madrid](https://www.tamtam.ai/l/consulting-firms-madrid) (157)
- [IT services companies in Madrid](https://www.tamtam.ai/l/it-services-companies-madrid) (155)
- [Education providers in Madrid](https://www.tamtam.ai/l/education-companies-madrid) (141)
- [IT Services and IT Consulting companies in Madrid](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-madrid) (138)
- [Software Development companies in Madrid](https://www.tamtam.ai/l/software-development-companies-madrid) (129)
- [Financial Services companies in Madrid](https://www.tamtam.ai/l/financial-services-companies-madrid) (125)
- [Insurance companies in Madrid](https://www.tamtam.ai/l/insurance-companies-madrid) (122)
- [SaaS companies in Madrid](https://www.tamtam.ai/l/saas-companies-madrid) (113)
- [Hotel and hospitality groups in Madrid](https://www.tamtam.ai/l/hospitality-groups-madrid) (104)
- [Manufacturers in Madrid](https://www.tamtam.ai/l/manufacturers-madrid) (91)
- [Public sector organisations in Madrid](https://www.tamtam.ai/l/public-sector-organisations-madrid) (90)
- [Retail Apparel and Fashion companies in Madrid](https://www.tamtam.ai/l/retail-apparel-and-fashion-companies-madrid) (89)
- [Corporate groups and holding companies in Madrid](https://www.tamtam.ai/l/holding-companies-madrid) (89)
- [Business Consulting and Services companies in Madrid](https://www.tamtam.ai/l/business-consulting-and-services-companies-madrid) (80)
- [Marketing and communications agencies in Madrid](https://www.tamtam.ai/l/marketing-agencies-madrid) (79)
## The same list elsewhere in Spain
- [Companies with in-house R&D in Spain](https://www.tamtam.ai/l/r-and-d-companies-spain) (1,067)
- [Companies with in-house R&D in Catalonia](https://www.tamtam.ai/l/r-and-d-companies-catalonia) (324)
- [Companies with in-house R&D in Community of Madrid](https://www.tamtam.ai/l/r-and-d-companies-community-of-madrid) (245)
- [Companies with in-house R&D in Valencian Community](https://www.tamtam.ai/l/r-and-d-companies-valencian-community) (102)
- [Companies with in-house R&D in Basque Country](https://www.tamtam.ai/l/r-and-d-companies-basque-country) (99)
- [Companies with in-house R&D in Andalusia](https://www.tamtam.ai/l/r-and-d-companies-andalusia) (89)
- [Companies with in-house R&D in Region of Murcia](https://www.tamtam.ai/l/r-and-d-companies-region-of-murcia) (25)
- [Companies with in-house R&D in Barcelona](https://www.tamtam.ai/l/r-and-d-companies-barcelona) (122)
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Source: https://www.tamtam.ai/l/r-and-d-companies-madrid