The Isère department's critical infrastructure operators are mostly large public sector organizations and mid-sized healthcare providers. These include major regional hospitals like CHU Grenoble Alpes, public safety services such as SDIS38, and urban transit operators like M TAG. Renewable energy is also represented by companies like GEG - Gaz Electricité de Grenoble and Waga Energy, which converts landfill gas into biomethane.
A clear pattern is the strong presence of healthcare institutions, with hospitals like Centre Hospitalier Alpes-Isère in Saint-Égrève and Clinique Belledonne - ELSAN in Saint-Martin-d'Hères. Government administrations like Grenoble-Alpes Métropole and Le Grésivaudan - Communauté de communes also form a significant cluster, reflecting the essential public services in the region.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
CHU Grenoble Alpeschu-grenoble.fr
Major regional hospital providing comprehensive medical, surgical, emergency care, and health research across multiple specialized disciplines and advanced technology. |
3,812 | |||
| 2 |
Grenoble-Alpes Métropolegrenoblealpesmetropole.fr
Leading administration in Grenoble responsible for transportation, waste management, economic development, and environmental preservation within the city |
1,121 | |||
| 3 |
SDIS38 - Service Départemental d'Incendie et de Secours de l'Isèresdis38.fr
Organization of fire and rescue services across 21 centers, operational command, prevention actions, and administrative management under local authorities. |
774 | |||
| 4 |
Centre Hospitalier Alpes-Isèrech-alpes-isere.fr
Provides specialized psychiatric care for adults, adolescents, and children across multiple sites, including hospitals and outpatient centers. |
670 | |||
| 5 | 429 | ||||
| 6 |
GEG - Gaz Electricité de Grenoblegroupe.geg.fr
Energy production, distribution, and supply with focus on renewable sources, sustainability, and community engagement across France. |
386 | |||
| 7 |
La Mut' - GHM de Grenobleghm-grenoble.fr
A non-profit healthcare group in Grenoble offers medical services, surgery, maternity, and more Part of a larger health group focused on social impact and innovation |
383 | |||
| 8 |
Centre Hospitalier Lucien Husselch-vienne.fr
The hospital offers a diverse range of medical services including emergency care, specialized treatments, maternity care, geriatrics, and an Institute for Nursing Education |
353 | |||
| 9 |
Waga Energywaga-energy.com
This company converts landfill gas into Renewable Natural Gas (RNG) using patented technology, reducing CO2 emissions and supplying households with biomethane |
316 | |||
| 10 |
Le Grésivaudan - Communauté de communesle-gresivaudan.fr
A community of 43 municipalities with over 100,000 residents, working together to provide services and support in Le Grésivaudan |
296 | |||
| 11 |
GHND - Groupement Hospitalier Nord-Dauphinéghnd.fr
The healthcare facility provides medical services to a territory with 230,000 residents, offering a range of care including medicine, surgery, pediatrics, and elderly care |
261 | |||
| 12 |
Pays Voironnaispaysvoironnais.com
Autonomous living area with 31 communes, providing urban functions, services, and economic development through traditional and high-tech industries. |
258 | |||
| 13 |
Clinique Belledonne - ELSANelsan.care
Hospital & health care company in Rhone-Alpes, France, located in Saint-Martin-d'Hères Specializes in providing medical services to patients |
255 | |||
| 14 |
GROUPE AGIR à domagiradom.com
Provides home healthcare services specializing in respiratory assistance, infusion, nutrition, diabetes, and medical equipment across 14 French departments. |
247 | |||
| 15 |
Clinique des Cèdrescliniquedescedres.com
Modern medical facility offering 24/7 emergency surgical services, continuous care, maternity, orthopedics, and ambulatory surgery with high safety standards. |
244 | |||
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 | 243 | ||||
| 17 |
UNIBIO Laboratoire de Biologie Médicalelabo-unibio.fr
Multisite independent laboratory group owned by medical biologists, providing local medical biology services across the Auvergne-Rhône-Alpes region. |
229 | |||
| 18 |
Fondation Georges BOISSELfondation-boissel.fr
Management of mental health, psychic disability, and social reintegration facilities, adapting services to regional health and social policy needs. |
221 | |||
| 19 |
Clinique Saint Vincent de Paulclinique-bourgoin.com
Healthcare facility providing surgical care, maternity services, and patient support with a focus on comfort, dignity, and innovative treatments. |
169 | |||
| 20 |
🎗Centre Médical Rocheplane Fondation Audavieaudavie.fr
Established in 1928, the company provides specialized care in rehabilitation and geriatrics, aiming to support patients through acute care, rehabilitation, and reintegration into daily life |
162 | |||
| 21 |
Compagnie de Chauffagecompagniedechauffage.fr
Management and operation of an extensive urban heat network supplying over 100,000 homes with 82% renewable and recovered energy. |
138 | |||
| 22 |
Assurance Maladie de l'Isèreameli.fr
A social security organization in Isère, implementing national health insurance policies, ensuring access to healthcare, promoting prevention, and improving healthcare efficiency |
136 | |||
| 23 |
PERRAUD Groupgroupeperraud.com
providing tailored transport and tourism services for all individuals including students, disabled, patients, tourists, and general public |
131 | |||
| 24 |
CARS FAUREfauretransport.fr
One of the top private passenger transport companies in France, operating a fleet of over 1,100 vehicles and serving numerous public entities |
117 | |||
| 25 |
GROUPE CLINIQUE DU MAILgroupedumail.fr
A medical imaging clinic providing advanced diagnostic services to patients for accurate and timely medical assessments and treatments |
109 | |||
| 26 |
Entre Bièvre et Rhône Communauté de communesentre-bievreetrhone.fr
A community of 37 municipalities in Isère, France, serving nearly 67,000 residents between the Bièvre and Rhône rivers |
99 | |||
| 27 |
GreenAlpgreenalp.fr
For the past 150 years, this company has been distributing gas and electricity in Grenoble, focusing on technical expertise, customer culture, innovation, and future energy models |
85 | |||
| 28 | 68 | ||||
| 29 |
CHUGA - Voironch-voiron.fr
Public health establishment with 362 beds offering a wide range of medical services including surgeries, cardiology, geriatrics, pediatrics, maternity, emergency care, and imaging |
57 | |||
| 30 |
Centre Hospitalier Michel Perret de Tullinsch-tullins.fr
The healthcare facility offers a diverse range of inpatient and outpatient services, specializing in rehabilitation and geriatric care within its territory |
52 | |||
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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 the Isère department
- The largest companies in the Isère department 1,457
- Companies with in-house R&D in the Isère department 304
- Manufacturers in the Isère department 178
- Multinational companies in the Isère department 174
- Hardware manufacturers in the Isère department 143
- Retail chains in the Isère department 100
- Software Development companies in the Isère department 90
- Professional services firms in the Isère department 87
- Public sector organisations in the Isère department 80
- Distributors and wholesalers in the Isère department 78
- IT services companies in the Isère department 75
- SaaS companies in the Isère department 72
- Electronics and semiconductor companies in the Isère department 70
- Contract manufacturers in the Isère department 68
- IT Services and IT Consulting companies in the Isère department 68
- Family-owned companies in the Isère department 61
- Industrial Machinery Manufacturing companies in the Isère department 58
- Consulting firms in the Isère department 57
- Construction companies in the Isère department 52
- Pharmaceutical companies in the Isère department 47
- Education providers in the Isère department 46
- Medical device companies in the Isère department 43
- Energy companies in the Isère department 41
- Chemical companies in the Isère department 40
The same list elsewhere in France
- Critical infrastructure operators in France 2,721
- Critical infrastructure operators in Île-de-France 780
- Critical infrastructure operators in Auvergne-Rhône-Alpes 299
- Critical infrastructure operators in Grand Est 257
- Critical infrastructure operators in Occitanie 216
- Critical infrastructure operators in Nouvelle-Aquitaine 209
- Critical infrastructure operators in Provence-Alpes-Côte d'Azur 200
- Critical infrastructure operators in Hauts-de-France 174
- Critical infrastructure operators in the Hauts-de-Seine department 169
- Critical infrastructure operators in Pays de la Loire 127
- Critical infrastructure operators in Brittany 120
- Critical infrastructure operators in Normandy 103
- Critical infrastructure operators in the Bouches-du-Rhône department 98
- Critical infrastructure operators in the Rhône department 94
- Critical infrastructure operators in Centre-Val de Loire 87
- Critical infrastructure operators in the Nord department 87
- Critical infrastructure operators in Bourgogne-Franche-Comté 76
- Critical infrastructure operators in the Haute-Garonne department 64
- Critical infrastructure operators in the Gironde department 63
- Critical infrastructure operators in the Loire-Atlantique department 59
- Critical infrastructure operators in the Hérault department 57
- Critical infrastructure operators in the Seine-Saint-Denis department 53
- Critical infrastructure operators in the Seine-Maritime department 46
- Critical infrastructure operators in Paris 331