These Madrid-based organizations primarily comprise large public research institutions and universities. They are dedicated to advancing knowledge across various fields, from higher education to specialized scientific research.
Notable entities include the Universidad Complutense de Madrid, a public university offering extensive education and research, and CSIC, a government agency focused on scientific and technological progress. Hospital Universitario La Paz provides specialized healthcare services, while CNIC - Spanish National Center for Cardiovascular Research focuses on cardiovascular health. A common pattern among these institutions is their significant public sector presence and their focus on research, often with a national or international scope.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
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 | |||
| 2 |
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 | |||
| 3 | 5,797 | ||||
| 4 |
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 | |||
| 5 |
Universidad CEU San Pablouspceu.com
We believe in your talent Transform your vocation into a profession at CEU San Pablo University Work towards your future with us |
2,861 | |||
| 6 | 1,855 | ||||
| 7 | 999 | ||||
| 8 |
Instituto de Salud Carlos IIIisciii.es
A leading public research institution in Spain focused on biomedical research, public health, training, and providing healthcare services to the population |
948 | |||
| 9 |
CNIC - Spanish National Center for Cardiovascular Research / Centro Nac. Investigaciones Cardiovasc.cnic.es
A leading international research center dedicated to understanding cardiovascular health, translating knowledge into patient care, and training talented biomedical researchers in Spain |
822 | |||
| 10 |
Universidad Villanuevavillanueva.edu
A specialized university in Communication, Law, Education, Business, Health, and Psychology, focused on training professionals to transform society with values |
669 | |||
| 11 |
CNIO - Spanish National Cancer Research Centrecnio.es
A Spanish institution focused on cancer research, diagnosis, and treatment with state-of-the-art facilities, clinical research units, and academic drug discovery program |
615 | |||
| 12 |
Instituto Español de Oceanografíaieo.es
A national research center focused on marine sciences, sustainability of fisheries, and marine environment, representing Spain in international forums, with various facilities and fleet |
590 | |||
| 13 |
INSST Instituto Nacional de Seguridad y Salud en el Trabajoinsst.es
Specialized organization analyzing and promoting workplace safety and health conditions, cooperating with government entities, autonomous communities, and relevant organizations to improve safety standards |
590 | |||
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. | |||||
| 14 |
Universidad Nacional de Educación a Distancia (UNED)uned.es
A prestigious Spanish distance learning university offering a wide range of undergraduate, postgraduate, and non-degree programs globally since 1972 |
459 | |||
| 15 |
Centro Nacional de Biotecnología (CNB-CSIC)cnb.csic.es
A research center under CSIC focused on developing modern biotechnology, acquiring knowledge, promoting technology transfer, training researchers, and engaging society |
443 | |||
| 16 |
Instituto Nacional de Técnica Aeroespacial «Esteban Terradas»inta.es
The company is a Public Research Agency specialized in dual technological research in aeronautics, space, hydrodynamics, security, and defense sectors |
440 | |||
| 17 |
Fundación para la Investigación Biomédica HULPidipaz.es
A non-profit entity managing biomedical research programs in Madrid, aimed at improving healthcare and promoting population health |
428 | |||
| 18 |
Centro de Investigación Biomédica en Red CIBERciberisciii.es
A biomedical research network in Spain focusing on translational research, connecting top research groups for industry transfer, led by ISCIII |
379 | |||
| 19 |
CEDEX - Centro de Estudios y Experimentación de Obras Públicascedex.es
A public organization specializing in civil engineering, construction, and environmental studies, providing high-level technical support, research, and technological development for public and private sectors |
328 | |||
| 20 |
RAE (Real Academia Española)rae.es
Preserving proper use and unity of the Spanish language, a shared heritage of 500 million Spanish speakers, since 1713 |
225 | |||
| 21 |
Asociacion ICEAicea.es
Leading research association in the Spanish insurance industry, compiling statistics, conducting market analysis, providing training, and representing over 200 insurance companies |
146 | |||
| 22 |
Biblioteca Hospital 12 Octubrecendoc.h12o.es
Company specializing in medical research on infectious diseases, with a focus on cytomegalovirus infection in solid organ transplant recipients |
43 | |||
| 23 |
Sociedad Española de Fertilidadsefertilidad.net
A scientific society promoting fertility studies for social issues, advising on reproductive health, and disseminating medical knowledge |
39 | |||
| 24 |
Sociedad Española de Periodoncia y Osteointegraciónsepa.es
The company works in the non-profit sector to promote general well-being through partnerships, education, research, and social action programs |
36 | |||
| 25 |
Real Academia de la Historiarah.es
Established in 1735, this corporation is dedicated to supporting historical research through its departments, library, biographical dictionary, and antiquities cabinet They also host events |
31 | |||
| 26 |
Sociedad Española de Alergología e Inmunología Clínicaseaic.org
Founded in 1948, this non-profit scientific society focuses on professional excellence in allergy and related diseases for the benefit of patients |
25 | |||
| 27 |
Sociedad Española de Medicina Geriátricasemeg.es
A non-profit Spanish organization dedicated to promoting the study and development of Geriatrics, conducting research, providing advice, and supporting professional training in elderly care |
19 | |||
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 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
- 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
The same list elsewhere in Spain
- Research institutes in Spain 183
- Research institutes in Catalonia 59
- Research institutes in Community of Madrid 29
- Research institutes in Barcelona 31