# Top 50 foundations in Île-de-France

Tamtam tracks 234 foundations headquartered in Île-de-France. This list ranks the 50 largest by number of employees on LinkedIn, led by Servier, Institut Pasteur and Apprentis d'Auteuil. Their median headcount is 428. Half of them were founded in 1948 or later. The most common headquarters are Paris (31), Boulogne-Billancourt (2) and Levallois-Perret (2).

These foundations in Île-de-France primarily operate in healthcare, social services, and scientific research. They range from large established institutions to more recent organizations. For example, Servier develops pharmaceuticals, Institut Pasteur conducts biomedical research, Apprentis d'Auteuil educates disadvantaged youth, and Institut Curie focuses on cancer research and treatment.

A notable pattern among these foundations is their strong concentration in Paris, with many headquartered in the capital. Their founding dates span from the late 19th century, such as Institut Pasteur (1887) and Apprentis d'Auteuil (1866), through to more recent establishments like Institut du Cerveau (2010), indicating a long-standing tradition of philanthropic and public service initiatives in the region.

🇫🇷 Île-de-France · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Servier](https://www.tamtam.ai/c/servier) (servier.com)<br>Develops pharmaceuticals focused on cardiology, venous diseases, oncology, neurology, and rare diseases, prioritizing patient needs and investing heavily in research. | Pharmaceutical Manufacturing | 🇫🇷 Suresnes | 14,291 | 1954 |
| 2 | [Institut Pasteur](https://www.tamtam.ai/c/institut-pasteur) (pasteur.fr)<br>Non-profit foundation specializing in biomedical research, public health, training, and technological innovation to combat infectious diseases worldwide. | Research Services | 🇫🇷 Paris | 4,743 | 1887 |
| 3 | [Apprentis d'Auteuil](https://www.tamtam.ai/c/apprentis-d-auteuil) (apprentis-auteuil.org)<br>Educate and train over 13,000 disadvantaged youth, support family parental responsibilities, promote social integration and personal responsibility. | Non-profit Organizations | 🇫🇷 Paris | 4,096 | 1866 |
| 4 | [Institut Curie](https://www.tamtam.ai/c/institut-curie) (curie.fr)<br>A public utility foundation combining cancer research, innovative healthcare, and multidisciplinary approach to fight cancer through fundamental, translational, and clinical research | Hospitals and Health Care | 🇫🇷 Paris | 3,105 | 1909 |
| 5 | [Hôpitaux Saint-Joseph & Marie-Lannelongue](https://www.tamtam.ai/c/hopitaux-saint-joseph-and-marie-lannelongue) (fhsj.fr)<br>Specialized hospital providing comprehensive services in medicine, surgery, and obstetrics, focusing on patient care and medical treatments. | Hospitals and Health Care | 🇫🇷 Paris | 2,221 |  |
| 6 | [SOS Villages d'Enfants](https://www.tamtam.ai/c/sos-villages-d-enfants) (sosve.org)<br>Providing family-like care and support to orphaned siblings, ensuring emotional and educational stability until independence worldwide. | Civic and Social Organizations | 🇫🇷 Paris | 2,197 | 1956 |
| 7 | [Hilti France](https://www.tamtam.ai/c/hilti-france) (hilti.fr)<br>Provides advanced tools, technologies, software, and services for the construction industry, helping clients build faster, safer, and more boldly worldwide, with a focus on innovation. | Construction | 🇫🇷 Boulogne-Billancourt | 1,675 | 1941 |
| 8 | [Fondation Adolphe de Rothschild](https://www.tamtam.ai/c/fondation-adolphe-de-rothschild) (for.paris)<br>Specializes in head and neck pathologies for adults and children, offering excellent care, research, and training at a conventional rate in Paris. | Hospitals and Health Care | 🇫🇷 Paris | 1,481 | 1905 |
| 9 | [Fondation Partage et Vie](https://www.tamtam.ai/c/fondation-partage-et-vie) (fondationpartageetvie.org)<br>A public utility Foundation providing care and support for individuals facing loss of autonomy, with 127 establishments across France Innovating and improving quality of life | Individual and Family Services | 🇫🇷 Montrouge | 1,183 |  |
| 10 | [Fondation INFA](https://www.tamtam.ai/c/fondation-infa) (infa-formation.com)<br>The foundation provides professional training and qualifications in various sectors to help individuals, including the less qualified, access employment opportunities | Professional Training and Coaching | 🇫🇷 Fontenay-sous-Bois | 821 | 1945 |
| 11 | [Institut du Cerveau – Paris Brain Institute](https://www.tamtam.ai/c/institut-du-cerveau-paris-brain-institute) (institutducerveau.org)<br>Research center focused on brain studies, developing treatments for neurological diseases through collaboration among patients, doctors, researchers, and entrepreneurs. | Biotechnology Research | 🇫🇷 Paris | 806 | 2010 |
| 12 | [Petits Frères des Pauvres](https://www.tamtam.ai/c/petits-freres-des-pauvres) (petitsfreresdespauvres.fr)<br>fight elderly isolation and loneliness, support vulnerable seniors, promote social inclusion, and foster meaningful connections for aging individuals | Non-profit Organizations | 🇫🇷 Paris | 735 | 1946 |
| 13 | [SOLIHA](https://www.tamtam.ai/c/soliha) (soliha.fr)<br>Supports individuals, elderly, and disabled for better housing, energy transition, fights substandard homes, mobilizes private housing for social good, creates insertion housing, revitalizes neighborhoods. | Civic and Social Organizations | 🇫🇷 Paris | 734 | 2015 |
| 14 | [FONDATION LEOPOLD BELLAN](https://www.tamtam.ai/c/fondation-leopold-bellan) (bellan.fr)<br>The foundation manages 78 innovative establishments and services in various sectors including childcare, youth support, disability services, elderly care, and healthcare | Hospitals and Health Care | 🇫🇷 Paris | 726 | 1884 |
| 15 | [Fondation Des Amis de l'Atelier](https://www.tamtam.ai/c/fondation-des-amis-de-l-atelier) (fondation-amisdelatelier.org)<br>Dedicated to individuals with psychic and mental disabilities, offering specialized services including accommodation, care, educational support, and vocational integration within 66 facilities. | Mental Health Care | 🇫🇷 Châtenay-Malabry | 633 | 1961 |
| 16 | [FONDATION PERCE-NEIGE](https://www.tamtam.ai/c/fondation-perce-neige) (perce-neige.org)<br>Provide specialized housing, support families, advocate for disabled individuals, support autism education, and promote research for people with disabilities. | Non-profit Organizations | 🇫🇷 Levallois-Perret | 620 | 1966 |
| 17 | [Fondation ANAIS](https://www.tamtam.ai/c/fondation-anais) (fondation-anais.org)<br>Support personal development, social and professional integration for people with disabilities through medical-social services and economic activity programs. | Civic and Social Organizations | 🇫🇷 Paris | 604 | 1954 |
| 18 | [Fondation de l'Armée du Salut](https://www.tamtam.ai/c/fondation-de-l-armee-du-salut) (armeedusalut.fr)<br>Provide emergency aid, social reintegration, and prevention services through numerous establishments, supported by volunteers, employees, and donors. | Civic and Social Organizations | 🇫🇷 Paris | 583 | 1881 |
| 19 | [Fondation Santé des Etudiants de France](https://www.tamtam.ai/c/fondation-sante-des-etudiants-de-france) (fsef.net)<br>Providing comprehensive health support for adolescents and young adults, including psychiatric care, rehabilitation, prevention, social reinsertion, and hospital-university research programs. | Hospitals and Health Care | 🇫🇷 Paris | 541 | 1924 |
| 20 | [ACTION ENFANCE](https://www.tamtam.ai/c/action-enfance) (actionenfance.org)<br>Foundation providing stable, protective environments for siblings separated from families, supporting their education, growth, and social integration. | Non-profit Organizations | 🇫🇷 Paris | 536 | 1943 |
| 21 | [PIERRE FABRE DERMO-COSMETIQUE](https://www.tamtam.ai/c/pierre-fabre-dermo-cosmetique)<br>Development and distribution of dermo-cosmetic products focusing on skincare and beauty solutions based in France. | Personal Care Product Manufacturing | 🇫🇷 Boulogne-Billancourt | 518 |  |
| 22 | [Fondation La Vie au Grand Air I Priorité Enfance](https://www.tamtam.ai/c/fondation-la-vie-au-grand-air-i-priorite-enfance) (fondationlavieaugrandair.org)<br>Support and protect over 4,200 children and families through social aid, fostering responsible adulthood with respect and solidarity. | Civic and Social Organizations | 🇫🇷 Issy-les-Moulineaux | 488 | 1927 |
| 23 | [FONDATION OEUVRE DE LA CROIX ST- SIMON](https://www.tamtam.ai/c/fondation-oeuvre-de-la-croix-st-simon) (croix-saint-simon.org)<br>A foundation providing a range of services to families from birth to end of life, catering to vulnerable populations through healthcare and education | Civic and Social Organizations | 🇫🇷 Paris | 487 | 1906 |
| 24 | [Fondation du Patrimoine](https://www.tamtam.ai/c/fondation-du-patrimoine) (fondation-patrimoine.org)<br>Nonprofit organization supporting restoration and funding of rural and local heritage sites, aiding public owners, private landowners, and sponsors. | Non-profit Organizations | 🇫🇷 Neuilly-sur-Seine | 470 | 1996 |
| 25 | [Fondation de France](https://www.tamtam.ai/c/fondation-de-france) (fondationdefrance.org)<br>Encouraging and supporting diverse social projects through expert collaboration, volunteer engagement, and managing numerous foundations across France. | Fundraising | 🇫🇷 Paris | 428 | 1969 |
| 26 | [FONDATION SANTE SERVICE](https://www.tamtam.ai/c/fondation-sante-service) (fondation-santeservice.fr)<br>Providing multidisciplinary home hospitalization and nursing care for acute and chronic patients, supporting family-centered care and healthcare professional training. | Hospitals and Health Care | 🇫🇷 Levallois-Perret | 419 | 1958 |
| 27 | [Hôpital Franco-Britannique](https://www.tamtam.ai/c/hopital-franco-britannique) (cognacq-jay-sante.fr)<br>Private nonprofit hospital providing high quality medical services to patients of all ages with a dedicated professional team. | Hospitals and Health Care | 🇫🇷 Levallois | 413 |  |
| 28 | [Fondation COS Alexandre Glasberg](https://www.tamtam.ai/c/fondation-cos-alexandre-glasberg) (fondationcos.org)<br>The organization manages over 60 facilities in France to care for elderly, support individuals with disabilities, aid refugees, and assist those in extreme social precarity | Civic and Social Organizations | 🇫🇷 Paris | 396 | 1944 |
| 29 | [Jean Cotxet Foundation](https://www.tamtam.ai/c/jean-cotxet-foundation) (jean-cotxet.fr)<br>A public utility association in Paris, founded in 1959, dedicated to protecting children with 33 facilities and 1000 employees serving 4000 individuals annually | Civic and Social Organizations | 🇫🇷 Paris | 395 | 1959 |
| 30 | [Hôpital Marie-Lannelongue](https://www.tamtam.ai/c/hopital-marie-lannelongue) (hopitalmarielannelongue.fr)<br>A non-profit private hospital specializing in surgical treatment of cardiac, pulmonary, and vascular conditions from newborns to adults | Hospitals and Health Care | 🇫🇷 Le Plessis-Robinson | 394 | 1948 |
| 31 | [FONDATION OLGA SPITZER](https://www.tamtam.ai/c/fondation-olga-spitzer) (fondationolgaspitzer.fr)<br>An individual & family services company located in Paris, France, providing support and assistance to clients in various aspects of their lives | Civic and Social Organizations | 🇫🇷 Paris | 393 | 1923 |
| 32 | [Fondation Saint Jean de Dieu](https://www.tamtam.ai/c/fondation-saint-jean-de-dieu) (fondation-saintjeandedieu.fr)<br>Providing healthcare, social, and medico-social services to over 20,000 vulnerable individuals annually across multiple regions with dedicated staff. | Hospitals and Health Care | 🇫🇷 Paris | 357 | 2012 |
| 33 | [Les Diaconesses de Reuilly](https://www.tamtam.ai/c/les-diaconesses-de-reuilly) (lesdiaconesses.org)<br>Nonprofit organization providing healthcare, social support, inclusion for disabled, elderly care, end-of-life assistance, and healthcare professional training. | Health and Human Services | 🇫🇷 Versailles | 354 | 1841 |
| 34 | [IRTS IDF MONTROUGE NEUILLY-SUR-MARNE MEAUX](https://www.tamtam.ai/c/irts-idf-montrouge-neuilly-sur-marne-meaux) (fondation-itsrs.org)<br>Providing social work education, research, and training programs focused on professional qualifications and adapting social interventions to current needs. | Higher Education | 🇫🇷 Montrouge | 347 | 1901 |
| 35 | [Fondation Ellen Poidatz](https://www.tamtam.ai/c/fondation-ellen-poidatz) (fondationpoidatz.com)<br>Management of pediatric rehabilitation centers, support for disabled children and adults, adapted schooling, and research in healthcare innovation. | Hospitals and Health Care | 🇫🇷 Chailly-en-Bière | 329 | 1919 |
| 36 | [Institut du monde arabe](https://www.tamtam.ai/c/institut-du-monde-arabe) (imarabe.org)<br>Cultural institution promoting Arab civilization, language, and development; fostering Franco-Arab exchanges in culture, science, and cooperation. | Artists and Writers | 🇫🇷 Paris | 302 | 1980 |
| 37 | [Fondation de Rothschild](https://www.tamtam.ai/c/fondation-de-rothschild) (fondation-de-rothschild.fr)<br>Supports vulnerable people, including elderly, children, and disabled adults, providing care, education, and rehabilitation services since 1852. | Hospitals and Health Care | 🇫🇷 Paris | 295 |  |
| 38 | [HOPITAL FORCILLES - Fondation Cognacq-Jay](https://www.tamtam.ai/c/hopital-forcilles-fondation-cognacq-jay) (hopital-forcilles.cognacq-jay.fr)<br>The company provides rehabilitation for patients with chronic diseases, cancer treatment expertise, and medical consultations for locals in Seine-et-Marne | Hospitals and Health Care | 🇫🇷 Férolles-Attilly | 278 | 1964 |
| 39 | [Ifri - Institut français des relations internationales](https://www.tamtam.ai/c/ifri-institut-francais-des-relations-internationales) (ifri.org)<br>Leading independent research institute in France, specializing in international affairs and global governance Conducts policy-oriented research, hosts debates, and publishes influential publications | Think Tanks | 🇫🇷 Paris | 275 | 1979 |
| 40 | [FONDATION FALRET](https://www.tamtam.ai/c/fondation-falret) (falret.org)<br>Support for individuals with mental fragility through personalized care, social integration, employment assistance, and advocacy for mental health awareness. | Non-profit Organizations | 🇫🇷 Pantin | 273 | 1841 |
| 41 | [Fondation Cognacq-Jay](https://www.tamtam.ai/c/fondation-cognacq-jay) (cognacq-jay.fr)<br>Provide healthcare, social protection, child welfare, and education services across multiple establishments supporting vulnerable individuals throughout life stages. | Civic and Social Organizations | 🇫🇷 Paris | 263 | 1916 |
| 42 | [Fondation l'Élan Retrouvé](https://www.tamtam.ai/c/fondation-l-elan-retrouve) (elan-retrouve.org)<br>supporting disabled individuals through therapeutic work, promoting personal autonomy, social integration, and patient involvement in care decisions. | Mental Health Care | 🇫🇷 Paris | 260 | 1948 |
| 43 | [SeaBird](https://www.tamtam.ai/c/seabird) (seabirdconseil.com)<br>Consulting firm specializing in operational strategy, transformation, and performance improvement for insurance, banking, and asset management sectors with human-centered solutions. | Financial Services | 🇫🇷 Paris | 254 | 2005 |
| 44 | [Fondation pour le Logement des Défavorisés](https://www.tamtam.ai/c/fondation-pour-le-logement-des-defavorises) (fondationpourlelogement.fr)<br>Non-profit organization fighting housing insecurity, poverty, and exclusion, creating shelters and supporting over 500 associations to improve living conditions for disadvantaged individuals. | Non-profit Organizations | 🇫🇷 Paris | 218 | 1987 |
| 45 | [Cité internationale universitaire de Paris](https://www.tamtam.ai/c/cite-internationale-universitaire-de-paris) (ciup.fr)<br>Provides housing and cultural exchange opportunities for students, researchers, artists, and athletes from over 150 nationalities in Paris. | Education Administration Programs | 🇫🇷 Paris | 216 | 1925 |
| 46 | [LEO Pharma France](https://www.tamtam.ai/c/leo-pharma-france) (leo-pharma.fr)<br>Helps patients achieve healthy skin by offering therapeutic solutions for managing skin problems globally, with a focus on skin disease medications and solutions. | Pharmaceutical Manufacturing | 🇫🇷 Courbevoie | 209 |  |
| 47 | [Servier France](https://www.tamtam.ai/c/servier-france) (servier.com)<br>French pharmaceutical group, world leader in cardiovascular treatment, developing innovative solutions for patient care and therapeutic adherence, with significant investment in R&D and local production. | Pharmaceutical Manufacturing | 🇫🇷 | 193 | 1954 |
| 48 | [Mémorial de la Shoah](https://www.tamtam.ai/c/memorial-de-la-shoah) (memorialdelashoah.org)<br>A memorial in Paris educates new generations on the Holocaust to combat racism and intolerance through various activities and exhibits | Museums, Historical Sites, and Zoos | 🇫🇷 Paris | 185 | 2005 |
| 49 | [Art Explora](https://www.tamtam.ai/c/art-explora) (artexplora.org)<br>International foundation promoting arts access, participation, and engagement through digital technology, partnerships, and innovative cultural experiences worldwide. | Non-profit Organizations | 🇫🇷 Paris | 179 | 2019 |
| 50 | [Fondation Louis Vuitton](https://www.tamtam.ai/c/fondation-louis-vuitton) (fondationlouisvuitton.fr)<br>Promotion of art and culture through philanthropy, supporting creative initiatives, housed in architecturally significant building in Paris. | Museums, Historical Sites, and Zoos | 🇫🇷 Paris | 169 | 2006 |

## 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 Île-de-France

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- [Public sector organisations in Île-de-France](https://www.tamtam.ai/l/public-sector-organisations-ile-de-france) (993)
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## The same list elsewhere in France

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- [Foundations in the Rhône department](https://www.tamtam.ai/l/foundations-rhone) (26)
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- [Foundations in Paris](https://www.tamtam.ai/l/foundations-paris) (172)

## The same list elsewhere

- [Foundations in the world](https://www.tamtam.ai/l/foundations-in-the-world) (1,835)
- [Foundations in Europe](https://www.tamtam.ai/l/foundations-in-europe) (1,147)

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Source: https://www.tamtam.ai/l/foundations-ile-de-france