# The 100 largest companies in the Isère department

Tamtam tracks 1,457 companies headquartered in the Isère department. This list ranks the 100 largest by number of employees on LinkedIn, led by Groupe SAMSE, Tessi and CHU Grenoble Alpes. Their median headcount is 346. Half of them were founded in 1975 or later. The most common headquarters are Grenoble (36), Meylan (6) and Montbonnot-Saint-Martin (4).

This selection features large companies operating in the Isère department, primarily concentrated around Grenoble. These firms span various sectors, including manufacturing, retail, and specialized services. Many of them are well-established entities, with founding dates ranging from the mid-19th century to the late 20th century, indicating a history of sustained operations.

Among these companies are Groupe SAMSE, a distributor of building materials; Tessi, specializing in digital transformation and document process management; ARaymond, which designs and manufactures fastening systems; Soitec, a producer of innovative semiconductor materials; and Vicat, a family-owned cement production company. A notable pattern is the strong presence of companies involved in manufacturing and industrial supplies, alongside significant players in retail and specialized technical services.

🇫🇷 Isère · 100 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Groupe SAMSE](https://www.tamtam.ai/c/groupe-samse) (groupe-samse.fr)<br>An independent group distributing building materials for construction and housing, a leader in eastern France, specializing in DIY and construction material trade for professionals and individuals. | Wholesale Building Materials | 🇫🇷 Grenoble | 4,771 | 1920 |
| 2 | [Tessi](https://www.tamtam.ai/c/tessi) (tessi.eu)<br>Management of customer relations, payments, and document processes through digitalization and business process outsourcing solutions, ensuring information security for businesses. | IT Services and IT Consulting | 🇫🇷 Grenoble | 3,960 | 1971 |
| 3 | [CHU Grenoble Alpes](https://www.tamtam.ai/c/chu-grenoble-alpes) (chu-grenoble.fr)<br>Major regional hospital providing comprehensive medical, surgical, emergency care, and health research across multiple specialized disciplines and advanced technology. | Hospitals and Health Care | 🇫🇷 Grenoble | 3,812 |  |
| 4 | [ESF Ecole du Ski Français](https://www.tamtam.ai/c/esf-ecole-du-ski-francais) (esf.net)<br>Provides ski lessons and safety education across five mountain ranges, focusing on children and adults with professional instructors. | Spectator Sports | 🇫🇷 Meylan | 2,282 | 1945 |
| 5 | [ARaymond](https://www.tamtam.ai/c/araymond) (araymond.com)<br>Design and manufacture of sustainable fastening, fluid connection, and integration systems for automotive, energy, healthcare, agriculture, and construction industries worldwide through collaborative innovation. | Manufacturing | 🇫🇷 Grenoble | 2,155 | 1865 |
| 6 | [Soitec](https://www.tamtam.ai/c/soitec) (soitec.com)<br>A world leader in innovative semiconductor materials production for various electronics markets, striving for disruptive innovation with energy-efficient, competitive products | Semiconductor Manufacturing | 🇫🇷 Bernin | 1,935 | 1992 |
| 7 | [Go Sport](https://www.tamtam.ai/c/go-sport) (go-sport-ae.vercel.app)<br>Multi-brand retail chain providing professional clothing, footwear, and equipment for men, women, and children across various sports levels with reliable delivery services. | Sporting Goods Manufacturing | 🇫🇷 Sassenage | 1,685 |  |
| 8 | [ALTRAD PREZIOSO](https://www.tamtam.ai/c/altrad-prezioso) (altradprezioso.com)<br>Provides multidisciplinary technical engineering services primarily for Oil, Gas, and Power Generation, assisting clients with asset life extension and cost optimization. | Construction | 🇫🇷 Chasse-sur-Rhône | 1,663 | 1957 |
| 9 | [Grenoble Ecole de Management](https://www.tamtam.ai/c/grenoble-ecole-de-management) (grenoble-em.com)<br>A leading business school offering a wide range of educational programs in French and English, focused on solving complex problems for business and society | Education Administration Programs | 🇫🇷 Grenoble | 1,595 | 1984 |
| 10 | [Reliance](https://www.tamtam.ai/c/reliance-echirolles) (centrereliance.fr)<br>A training center founded in 1997, focusing on helping organizations optimize collective performance and personal well-being through effective management and team dynamics | Professional Training and Coaching | 🇫🇷 Échirolles | 1,557 | 1997 |
| 11 | [Maxi Zoo France](https://www.tamtam.ai/c/maxi-zoo-france) (carriere.maxizoo.fr)<br>Leading pet supplies retailer, offering products and services for animal well-being. Operates physical stores, e-commerce, and mobile app for pets and their owners. | Retail | 🇫🇷 Vaulx-Milieu | 1,325 | 1993 |
| 12 | [Groupe King Jouet](https://www.tamtam.ai/c/groupe-king-jouet) (king-jouet.com)<br>Family-founded company operating 250 toy stores and an e-commerce site, generating 300 million euros in sales with over 1000 employees. | Retail Groceries | 🇫🇷 Voiron | 1,264 | 1875 |
| 13 | [Vicat](https://www.tamtam.ai/c/vicat) (vicat.fr)<br>A family-owned company specializing in cement production and distribution, operating in 11 countries with over 7,040 employees worldwide | Wholesale Building Materials | 🇫🇷 L'Isle-d'Abeau | 1,261 | 1853 |
| 14 | [CEA-Leti](https://www.tamtam.ai/c/cea-leti) (leti-cea.com)<br>Development of micro- and nanotechnologies for smart, energy-efficient, and secure industrial applications including healthcare, energy, and digital sectors. | Semiconductor Manufacturing | 🇫🇷 Grenoble | 1,223 | 1967 |
| 15 | [Grenoble-Alpes Métropole](https://www.tamtam.ai/c/grenoble-alpes-metropole) (grenoblealpesmetropole.fr)<br>Leading administration in Grenoble responsible for transportation, waste management, economic development, and environmental preservation within the city | Government Administration | 🇫🇷 Grenoble | 1,121 | 1996 |
| 16 | [Ville de Grenoble](https://www.tamtam.ai/c/ville-de-grenoble) (grenoble.fr)<br>A territorial authority managing the municipal territory of Grenoble, overseeing a population of nearly 160,000 residents | Government Administration | 🇫🇷 Grenoble | 1,048 |  |
| 17 | [HARDIS GROUP](https://www.tamtam.ai/c/hardis-group) (hardis-group.com)<br>consulting and IT services company, a Salesforce pure player, and vendor of the Reflex logistics software suite for retail and supply chain transformation. | IT Services and IT Consulting | 🇫🇷 Seyssinet-Pariset | 1,015 | 1984 |
| 18 | [Verkor](https://www.tamtam.ai/c/verkor) (verkor.com)<br>Produces low-carbon batteries in France and Europe for electric vehicles and stationary storage, with a Gigafactory operational by 2025. | Motor Vehicle Parts Manufacturing | 🇫🇷 Grenoble | 997 | 2020 |
| 19 | [Sames](https://www.tamtam.ai/c/sames) (sames.com)<br>Provides equipment and services for applying paints, adhesives, and sealants, including guns, pumps, and dosing machines, focusing on efficiency and sustainability. | Industrial Machinery Manufacturing | 🇫🇷 Meylan | 990 | 1925 |
| 20 | [Rossignol Group](https://www.tamtam.ai/c/rossignol-group) (grouperossignol.com)<br>Leading manufacturer of winter sports equipment, specializing in skis and ski boots, with a focus on diversification and growth. | Spectator Sports | 🇫🇷 Saint-Jean-de-Moirans | 880 | 1907 |
| 21 | [Samat](https://www.tamtam.ai/c/samat) (samat.com)<br>A family-owned European company specializing in transport and logistics of sensitive products across various sectors with a sustainable fleet | Truck Transportation | 🇫🇷 Vienne | 840 | 1979 |
| 22 | [PlayerZone](https://www.tamtam.ai/c/playerzone) (player-zone.com)<br>Company offering video game news, live streams of latest games, and exclusive interviews/dossiers Founded by Guillaume HEMMEN, Laetitia CURRETTI, and Laurent DENIS | Entertainment Providers | 🇫🇷 La Côte-Saint-André | 831 | 2015 |
| 23 | [SDIS38 - Service Départemental d'Incendie et de Secours de l'Isère](https://www.tamtam.ai/c/sdis38-service-departemental-d-incendie-et-de-secours-de-l-isere) (sdis38.fr)<br>Organization of fire and rescue services across 21 centers, operational command, prevention actions, and administrative management under local authorities. | Public Safety | 🇫🇷 Fontaine | 774 | 1955 |
| 24 | [Cegelec CEM](https://www.tamtam.ai/c/cegelec-cem) (cegelec-cem.fr)<br>Designs, builds, and integrates equipment for new nuclear constructions, renovations, decommissioning, and high-stakes mechanical and electromechanical engineering projects in nuclear environments. | Industrial Machinery Manufacturing | 🇫🇷 Grenoble | 770 |  |
| 25 | [LYNRED](https://www.tamtam.ai/c/lynred) (lynred.com)<br>Designs and manufactures high-quality infrared technologies for aerospace, defense, and commercial markets, including IR detectors for military and thermal imaging equipment. | Semiconductor Manufacturing | 🇫🇷 Veurey-Voroize | 749 | 1986 |
| 26 | [Petzl](https://www.tamtam.ai/c/petzl) (petzl.com)<br>A company founded on a passion for exploration, Petzl designs tools and solutions for athletes and professionals to push their limits day and night | Retail | 🇫🇷 Crolles | 711 | 1975 |
| 27 | [ESRF - The European Synchrotron](https://www.tamtam.ai/c/esrf-the-european-synchrotron) (esrf.fr)<br>International science facility providing advanced synchrotron radiation for research in biology, medicine, chemistry, physics, and environmental sciences. | Research Services | 🇫🇷 Grenoble | 672 | 1994 |
| 28 | [Centre Hospitalier Alpes-Isère](https://www.tamtam.ai/c/centre-hospitalier-alpes-isere) (ch-alpes-isere.fr)<br>Provides specialized psychiatric care for adults, adolescents, and children across multiple sites, including hospitals and outpatient centers. | Hospitals and Health Care | 🇫🇷 Saint-Égrève | 670 |  |
| 29 | [Académie de Grenoble](https://www.tamtam.ai/c/academie-de-grenoble) (www1.ac-grenoble.fr)<br>Educational administration covering diverse geographic areas including urban centers and rural mountainous regions with a focus on quality living environments. | Primary and Secondary Education | 🇫🇷 Grenoble | 662 | 1848 |
| 30 | [MTB](https://www.tamtam.ai/c/mtb) (mtb-recycling.fr)<br>Specializes in recycling complex waste, manufacturing recycling machines, and engineering turnkey plants for efficient industrial waste management and recovery. | Machinery Manufacturing | 🇫🇷 Saint-Chef | 653 | 1981 |
| 31 | [AFIPH](https://www.tamtam.ai/c/afiph) (afiph.org)<br>An association in Isère, France, providing support and services for individuals with intellectual disabilities, autism, and multiple disabilities to promote their inclusion and autonomy | Civic and Social Organizations | 🇫🇷 Grenoble | 646 | 1961 |
| 32 | [Entrepôt du Bricolage](https://www.tamtam.ai/c/entrepot-du-bricolage) (entrepot-du-bricolage.fr)<br>A leading retail company focused on excellence in physical and online stores, offering personalized services and a wide range of products | Retail | 🇫🇷 Grenoble | 637 | 1974 |
| 33 | [CORYS](https://www.tamtam.ai/c/corys) (corys.com)<br>A leading French simulation company providing training and engineering simulators globally for transportation, power, and process industries | Software Development | 🇫🇷 Grenoble | 605 | 1989 |
| 34 | [SAMSE](https://www.tamtam.ai/c/samse) (samse.fr)<br>Family-owned company with extensive retail network, emphasizing customer relationships, autonomy, proximity, and valuing employee diversity and skills. | Wholesale Building Materials | 🇫🇷 Grenoble | 476 | 1920 |
| 35 | [ILL - Institut Laue Langevin](https://www.tamtam.ai/c/ill-institut-laue-langevin) (ill.eu)<br>Provides scientists with high flux neutrons and instruments for fundamental research in physics, chemistry, biology, materials, and nuclear science. | Research Services | 🇫🇷 Grenoble | 476 | 1967 |
| 36 | [Serge Ferrari Group](https://www.tamtam.ai/c/serge-ferrari-group) (sergeferrari.com)<br>Designs and manufactures innovative composite fabrics for light architectural and exterior landscaping applications focused on durability, safety, design, comfort, and eco-responsibility | Textile Manufacturing | 🇫🇷 La Tour-du-Pin | 462 | 1974 |
| 37 | [CEA-Liten](https://www.tamtam.ai/c/cea-liten) (liten.cea.fr)<br>Leading European research institute focusing on solar energy, batteries, hydrogen, and circular economy while developing decarbonization tools and eco-innovative industrial partnership solutions. | Research Services | 🇫🇷 Grenoble | 445 | 2004 |
| 38 | [Greta Formation - Académie de Grenoble](https://www.tamtam.ai/c/greta-formation-academie-de-grenoble) (gretaformation.fr)<br>A network of public establishments specializing in professional training, offering a wide range of courses in 10 different fields and providing consultancy services to businesses | Professional Training and Coaching | 🇫🇷 Grenoble | 435 | 1974 |
| 39 | [M TAG](https://www.tamtam.ai/c/m-tag) (m-tag.fr)<br>Management and operation of tram and bus lines, mobility agencies, and park-and-ride facilities in the Grenoble metropolitan area. | Urban Transit Services | 🇫🇷 Grenoble | 429 | 1975 |
| 40 | [ACADEMIE DE GRENOBLE RECTORAT (non officielle)](https://www.tamtam.ai/c/academie-de-grenoble-rectorat-non-officielle) (www1.ac-grenoble.fr)<br>This company's LinkedIn page is automatically created Personnel from the Grenoble Academy is invited to connect to their official page | Government Administration | 🇫🇷 Grenoble | 418 |  |
| 41 | [SBI](https://www.tamtam.ai/c/sbi) (sbisas.fr)<br>SBI specializes in turnkey construction projects as a General Contractor for professionals, managing projects from start to finish with a focus on cost, time, and quality | Construction | 🇫🇷 Saint-Égrève | 393 | 2001 |
| 42 | [SESA](https://www.tamtam.ai/c/sesa) (serfim.com)<br>SESA is a group of 4 companies specialized in designing, implementing, maintaining, and optimizing water networks with expertise in various techniques like encroachment and dewatering | Construction | 🇫🇷 Eybens | 388 |  |
| 43 | [GEG - Gaz Electricité de Grenoble](https://www.tamtam.ai/c/geg-gaz-electricite-de-grenoble) (groupe.geg.fr)<br>Energy production, distribution, and supply with focus on renewable sources, sustainability, and community engagement across France. | Renewable Energy Power Generation | 🇫🇷 Grenoble | 386 | 1867 |
| 44 | [KIS](https://www.tamtam.ai/c/kis) (kis.fr)<br>Provider of self-service photo booths and laundry machines, offering convenient, automated solutions for photography and laundry needs worldwide. | Retail Office Equipment | 🇫🇷 Échirolles | 384 |  |
| 45 | [La Mut' - GHM de Grenoble](https://www.tamtam.ai/c/la-mut-ghm-de-grenoble) (ghm-grenoble.fr)<br>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 | Hospitals and Health Care | 🇫🇷 Grenoble | 383 | 1958 |
| 46 | [Grenoble INP - UGA Recrutement](https://www.tamtam.ai/c/grenoble-inp-uga-recrutement) (grenoble-inp.nous-recrutons.fr)<br>Public higher education institution offering engineering and management programs, conducting innovative research, and promoting social and environmental responsibility. | Higher Education | 🇫🇷 Grenoble | 364 | 1900 |
| 47 | [Sciences Po Grenoble - UGA](https://www.tamtam.ai/c/sciences-po-grenoble-uga) (sciencespo-grenoble.fr)<br>Offers ambitious five-year intellectual programs forming future decision-makers, specializing in social sciences and political studies, with a strong international focus. | Higher Education | 🇫🇷 Saint-Martin-d'Hères | 355 | 1948 |
| 48 | [Glénat](https://www.tamtam.ai/c/glenat) (glenat.com)<br>French publishing house specializing in comics, manga, graphic novels, and high-quality illustrated books on nature, gastronomy, and heritage. | Book and Periodical Publishing | 🇫🇷 Grenoble | 354 | 1969 |
| 49 | [Centre Hospitalier Lucien Hussel](https://www.tamtam.ai/c/centre-hospitalier-lucien-hussel) (ch-vienne.fr)<br>The hospital offers a diverse range of medical services including emergency care, specialized treatments, maternity care, geriatrics, and an Institute for Nursing Education | Hospitals and Health Care | 🇫🇷 Vienne | 353 | 1967 |
| 50 | [Minitubes](https://www.tamtam.ai/c/minitubes) (minitubes.com)<br>A company specializing in custom high precision metal tubing manufacturing, offering innovative solutions from design to production with tight tolerance control | Medical Equipment Manufacturing | 🇫🇷 Grenoble | 346 | 1932 |
| 51 | [Winoa](https://www.tamtam.ai/c/winoa) (winoa.com)<br>An international leader in steel abrasives, providing solutions for metal and stone industries worldwide, with a focus on quality, innovation, and customer satisfaction | Manufacturing | 🇫🇷 Le Cheylas | 341 | 1961 |
| 52 | [Centre Communal d'Action Sociale de Grenoble (CCAS)](https://www.tamtam.ai/c/centre-communal-d-action-sociale-de-grenoble-ccas) (grenoble.fr)<br>The social services department in Grenoble analyzes community needs and implements policies focusing on seniors, childcare, and poverty/precarity reduction | Government Administration | 🇫🇷 Grenoble | 341 |  |
| 53 | [Korus Group](https://www.tamtam.ai/c/korus-group) (korusgroup.com)<br>Korus Group offers innovative consulting, design, build, furniture, and maintenance solutions to enhance work environments globally, focusing on performance and people | Design Services | 🇫🇷 La Murette | 331 | 1991 |
| 54 | [Condat SA](https://www.tamtam.ai/c/condat-sa) (condat.fr)<br>Formulates, produces wide range industrial lubricants; metal-forming, technical greases, hydraulic oils, cutting fluids, soaps, surface treatments. Focus on high-performance, responsible solutions. | Chemical Manufacturing | 🇫🇷 Chasse-sur-Rhône | 331 | 1854 |
| 55 | [VOUSFINANCER - Groupe ASSU 2000](https://www.tamtam.ai/c/vousfinancer-groupe-assu-2000) (vousfinancer.com)<br>Specializing in mortgage brokerage, we provide personalized guidance to individuals throughout the loan process, focusing on transparency and finding the best financing solution | Financial Services | 🇫🇷 Saint-Martin-le-Vinoux | 329 |  |
| 56 | [MasterGrid](https://www.tamtam.ai/c/mastergrid) (mastergrid.com)<br>MasterGrid specializes in electrical system services from high to low voltage, providing tailored solutions to optimize system lifecycle and improve environmental impact | Electric Power Transmission, Control, and Distribution | 🇫🇷 Grenoble | 328 | 2019 |
| 57 | [ECM Technologies - Industrial Furnaces](https://www.tamtam.ai/c/ecm-technologies-industrial-furnaces) (ecm-furnaces.com)<br>Design and supply of vacuum, high-temperature, and thermochemical process machines and solutions for various industrial sectors worldwide. | Machinery Manufacturing | 🇫🇷 Grenoble | 326 | 1928 |
| 58 | [IUT2 Grenoble](https://www.tamtam.ai/c/iut2-grenoble) (iut2.univ-grenoble-alpes.fr)<br>The IUT2 provides tailored training programs for businesses and local communities, offering a supportive environment for students to develop skills for successful career integration | Higher Education | 🇫🇷 Grenoble | 322 | 1966 |
| 59 | [Telenco](https://www.tamtam.ai/c/telenco) (telenco.com)<br>Industrial group designing, manufacturing, and distributing equipment for telecoms and datacom networks through production sites, B2B e-commerce, engineering, and technician training services. | Telecommunications | 🇫🇷 Moirans | 317 | 1999 |
| 60 | [Waga Energy](https://www.tamtam.ai/c/waga-energy) (waga-energy.com)<br>This company converts landfill gas into Renewable Natural Gas (RNG) using patented technology, reducing CO2 emissions and supplying households with biomethane | Renewable Energy Power Generation | 🇫🇷 Eybens | 316 | 2015 |
| 61 | [OROS](https://www.tamtam.ai/c/oros) (oros.com)<br>Specializing in noise and vibration testing systems, this dynamic company offers high-tech instruments, software, and related services for various industries globally | Industrial Machinery Manufacturing | 🇫🇷 Montbonnot-Saint-Martin | 312 | 1985 |
| 62 | [GENEL](https://www.tamtam.ai/c/genel) (genel.fr)<br>An international biotech company provides expert services for Dermo-Cosmetic, Nutraceutique, and Pharmaceutical companies through innovative strategies and cutting-edge technologies | Biotechnology Research | 🇫🇷 Meylan | 305 | 2014 |
| 63 | [Groupe Pierre Martinet](https://www.tamtam.ai/c/groupe-pierre-martinet) (martinet.fr)<br>Producer of fresh prepared salads combining authentic recipes, culinary innovation, environmental responsibility, and strong team spirit across Europe. | Food and Beverage Manufacturing | 🇫🇷 Saint-Quentin-Fallavier | 302 | 1968 |
| 64 | [Le Grésivaudan - Communauté de communes](https://www.tamtam.ai/c/le-gresivaudan-communaute-de-communes) (le-gresivaudan.fr)<br>A community of 43 municipalities with over 100,000 residents, working together to provide services and support in Le Grésivaudan | Government Administration | 🇫🇷 Crolles | 296 | 2009 |
| 65 | [Cimm immobilier](https://www.tamtam.ai/c/cimm-immobilier) (cimm.com)<br>Network of 200 real estate agencies across France, supporting individuals and professionals in property sales, purchases, and career development. | Real Estate | 🇫🇷 Montbonnot-Saint-Martin | 293 | 1979 |
| 66 | [Groupe BBL](https://www.tamtam.ai/c/groupe-bbl) (groupe-bbl.com)<br>A specialist federation offering logistics solutions in contract logistics, overseas transport, road transport, and customs & compliance services Growth from 440 to 2100 employees in 5 years | Transportation, Logistics, Supply Chain and Storage | 🇫🇷 Saint-Quentin-Fallavier | 292 | 1997 |
| 67 | [Ménage et Services](https://www.tamtam.ai/c/menage-et-services) (menageetservices.fr)<br>The company offers home cleaning, assistance services, and temporary home care They handle all administrative tasks, guarantee quality, and offer flexible payment options | Individual and Family Services | 🇫🇷 Meylan | 291 | 2017 |
| 68 | [SPARTOO](https://www.tamtam.ai/c/spartoo) (spartoo.com)<br>Online retail platform offering extensive footwear and fashion products across Europe and China, with free delivery and returns service. | Technology, Information and Internet | 🇫🇷 Grenoble | 290 | 2006 |
| 69 | [Teisseire](https://www.tamtam.ai/c/teisseire) (teisseire.com)<br>Leading producer of organic syrups and fruit juices, specializing in non-alcoholic refreshing beverages with iconic consumer and food service brands. | Beverage Manufacturing | 🇫🇷 Crolles | 287 | 1720 |
| 70 | [Grenoble INP - UGA](https://www.tamtam.ai/c/grenoble-inp-uga) (grenoble-inp.fr)<br>Public higher education institution combining engineering schools, management programs, and research laboratories within the University Grenoble Alpes. | Higher Education | 🇫🇷 Grenoble | 287 |  |
| 71 | [KAIZEN Solutions (KZS)](https://www.tamtam.ai/c/kaizen-solutions-kzs) (kaizen-solutions.net)<br>Designs, develops, and maintains customized software solutions for complex and critical technical and industrial systems, from sensor to cloud. | IT Services and IT Consulting | 🇫🇷 Montbonnot-Saint-Martin | 281 | 2013 |
| 72 | [SOCARA E.LECLERC](https://www.tamtam.ai/c/socara-e-leclerc-villette-d-anthon) (recrutement.leclerc)<br>Major logistics provider supplying over eighty retail outlets across the Rhône-Alpes region, ensuring essential goods reach store shelves through professional teamwork and solidarity. | Transportation, Logistics, Supply Chain and Storage | 🇫🇷 Villette-d'Anthon | 278 | 1976 |
| 73 | [CAPI](https://www.tamtam.ai/c/capi) (capi-agglo.fr)<br>Regional agglomeration in Isère with 22 communes, focusing on sustainable development, urban planning, public services, and economic growth. | Government Administration | 🇫🇷 L'Isle-d'Abeau | 275 | 2007 |
| 74 | [Alpes Isère Habitat](https://www.tamtam.ai/c/alpes-isere-habitat) (alpeshabitat.fr)<br>A public establishment in the Auvergne Rhône-Alpes region managing over 30,000 properties with 630 employees providing social support to 55,000 tenants | Real Estate | 🇫🇷 Grenoble | 274 | 1950 |
| 75 | [GINEYS](https://www.tamtam.ai/c/gineys) (gineys.com)<br>Specializing in distributing fresh, dry, and frozen food products since 1970, with a focus on quality and innovation (23 words) | Food and Beverage Manufacturing | 🇫🇷 Vienne | 274 | 1970 |
| 76 | [GHND - Groupement Hospitalier Nord-Dauphiné](https://www.tamtam.ai/c/ghnd-groupement-hospitalier-nord-dauphine) (ghnd.fr)<br>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 | Hospitals and Health Care | 🇫🇷 Bourgoin-Jallieu | 261 | 2016 |
| 77 | [Ville de Saint-Martin-d'Hères](https://www.tamtam.ai/c/ville-de-saint-martin-d-heres) (saintmartindheres.fr)<br>Local government providing social services, urban planning, education, culture, and environmental initiatives to support 40,000 residents effectively. | Government Administration | 🇫🇷 Saint-Martin-d'Hères | 261 | 1900 |
| 78 | [Pays Voironnais](https://www.tamtam.ai/c/pays-voironnais) (paysvoironnais.com)<br>Autonomous living area with 31 communes, providing urban functions, services, and economic development through traditional and high-tech industries. | Government Administration | 🇫🇷 Voiron | 258 | 1974 |
| 79 | [Clinique Belledonne - ELSAN](https://www.tamtam.ai/c/clinique-belledonne-elsan) (elsan.care)<br>Hospital & health care company in Rhone-Alpes, France, located in Saint-Martin-d'Hères Specializes in providing medical services to patients | Hospitals and Health Care | 🇫🇷 Saint-Martin-d'Hères | 255 |  |
| 80 | [ARTURIA](https://www.tamtam.ai/c/arturia) (arturia.com)<br>Creates instruments and effects for music creation, encouraging musical discovery and artistic process with accessible and inspiring sonic experiences for musicians. | Software Development | 🇫🇷 Montbonnot-Saint-Martin | 253 | 1999 |
| 81 | [MAFELEC TEAM](https://www.tamtam.ai/c/mafelec-team) (mafelec.com)<br>Designs subassemblies and equipment for harsh environments, providing innovative solutions for various sectors like HMI, railway, industry, and defense. | Industrial Machinery Manufacturing | 🇫🇷 Chimilin | 249 | 1947 |
| 82 | [GROUPE AGIR à dom](https://www.tamtam.ai/c/groupe-agir-a-dom) (agiradom.com)<br>Provides home healthcare services specializing in respiratory assistance, infusion, nutrition, diabetes, and medical equipment across 14 French departments. | Home Health Care Services | 🇫🇷 Meylan | 247 | 1974 |
| 83 | [SDH (Société Dauphinoise pour l'Habitat)](https://www.tamtam.ai/c/sdh-societe-dauphinoise-pour-l-habitat) (sdh.fr)<br>Manages 22,600 social housing units in Isère across 150 municipalities, constructs new rentals, rehabilitates properties, and acts as urban developer and social landlord. | Real Estate | 🇫🇷 Échirolles | 247 | 1948 |
| 84 | [WORK 2000](https://www.tamtam.ai/c/work-2000) (recrutement.work2000.fr)<br>Established in 1991, this company offers staffing solutions across France with 42 agencies and over 5,000 temporary workers They focus on familial management | Staffing and Recruiting | 🇫🇷 Meylan | 247 | 1991 |
| 85 | [ikami France](https://www.tamtam.ai/c/ikami-france) (ikami.fr)<br>Innovative international real estate network offering expertise in buying, selling, and managing properties, with a focus on training and support for independent agents | Real Estate | 🇫🇷 Saint-Martin-le-Vinoux | 246 | 2011 |
| 86 | [Clinique des Cèdres](https://www.tamtam.ai/c/clinique-des-cedres) (cliniquedescedres.com)<br>Modern medical facility offering 24/7 emergency surgical services, continuous care, maternity, orthopedics, and ambulatory surgery with high safety standards. | Hospitals and Health Care | 🇫🇷 Échirolles | 244 |  |
| 87 | [ULIS](https://www.tamtam.ai/c/ulis) (lynred.com)<br>Global leader in designing and manufacturing high quality infrared technologies for aerospace, defense, and commercial markets, with a vast portfolio of detectors | Semiconductor Manufacturing | 🇫🇷 Veurey-Voroize | 243 | 2002 |
| 88 | [VFD](https://www.tamtam.ai/c/vfd) (vfd.fr)<br>Transport company offering daily commute services for work and school, as well as vacation and leisure travel, covering multiple regions and serving millions of passengers annually | Ground Passenger Transportation | 🇫🇷 Saint-Égrève | 243 | 1894 |
| 89 | [Grenoble IAE](https://www.tamtam.ai/c/grenoble-iae) (iae.grenoble-inp.fr)<br>A university of management specializing in training specialized managers with double skills, offering B2 to B5 programs in various management fields | Higher Education | 🇫🇷 Saint-Martin-d'Hères | 241 |  |
| 90 | [Carlance Institut de Beauté (franchise)](https://www.tamtam.ai/c/carlance-institut-de-beaute-franchise) (franchisecarlance.fr)<br>Support franchisees in creating and managing beauty institutes offering accessible beauty treatments with exclusive management tools and renowned brand partnerships. | Wellness and Fitness Services | 🇫🇷 Chasse-sur-Rhône | 238 | 2001 |
| 91 | [Institut Néel CNRS](https://www.tamtam.ai/c/institut-neel-cnrs) (neel.cnrs.fr)<br>A fundamental research lab specializing in condensed matter physics, with interdisciplinary collaborations in chemistry, engineering, biology, and astrophysics | Research Services | 🇫🇷 Grenoble | 237 | 2007 |
| 92 | [FitnessBoutique](https://www.tamtam.ai/c/fitnessboutique) (fitnessboutique.fr)<br>Europe's leading sports nutrition and home fitness brand, delivering a range of premium products across the globe, recognized in the industry. | Retail | 🇫🇷 Voiron | 233 | 1999 |
| 93 | [Skyepharma- Fully integrated CDMO](https://www.tamtam.ai/c/skyepharma-fully-integrated-cdmo) (skyepharma.fr)<br>Develops, manufactures, and packages complex oral solid dosage forms. Provides tailored solutions from small-scale programs to commercial production for clients. | Pharmaceutical Manufacturing | 🇫🇷 Saint-Quentin-Fallavier | 232 | 1993 |
| 94 | [Groupe Efire](https://www.tamtam.ai/c/groupe-efire) (groupe-efire.com)<br>European leader in industrial sealing, fluids transfer, precision cutting, and technical protection with multiple brands and global clients. | Industrial Machinery Manufacturing | 🇫🇷 Chasse-sur-Rhône | 230 | 1872 |
| 95 | [UNIBIO Laboratoire de Biologie Médicale](https://www.tamtam.ai/c/unibio-laboratoire-de-biologie-medicale) (labo-unibio.fr)<br>Multisite independent laboratory group owned by medical biologists, providing local medical biology services across the Auvergne-Rhône-Alpes region. | Medical and Diagnostic Laboratories | 🇫🇷 Chasse-sur-Rhône | 229 | 2002 |
| 96 | [Hydrokarst](https://www.tamtam.ai/c/hydrokarst) (hydrokarst.fr)<br>Experts in difficult-access, hydromechanical, underwater, and hyperbaric operations. This includes securing cliffs, maintaining equipment, and executing complex projects in various sectors. | Construction | 🇫🇷 Sassenage | 225 | 1977 |
| 97 | [Laser Game Evolution](https://www.tamtam.ai/c/laser-game-evolution-grenoble) (lasergame-evolution.com)<br>provider of laser tag games offering individual and team play, with special corporate packages for events, seminars, and HR activities | Recreational Facilities | 🇫🇷 Grenoble | 224 |  |
| 98 | [BASSETTI France](https://www.tamtam.ai/c/bassetti-france) (bassetti-group.com)<br>Provides IT and consulting services, developing customizable software for structuring and capitalizing technical data, improving internal knowledge diffusion within organizations. | Software Development | 🇫🇷 Grenoble | 223 | 1992 |
| 99 | [Fondation Georges BOISSEL](https://www.tamtam.ai/c/fondation-georges-boissel) (fondation-boissel.fr)<br>Management of mental health, psychic disability, and social reintegration facilities, adapting services to regional health and social policy needs. | Hospitals and Health Care | 🇫🇷 Bourgoin-Jallieu | 221 | 1970 |
| 100 | [Trixell](https://www.tamtam.ai/c/trixell) (trixell.com)<br>Innovative joint venture specializing in X-ray flat panel digital detectors for various medical radiology applications | Medical Equipment Manufacturing | 🇫🇷 Moirans | 218 | 1997 |

## 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 the Isère department

- [Companies with in-house R&D in the Isère department](https://www.tamtam.ai/l/r-and-d-companies-isere) (304)
- [Manufacturers in the Isère department](https://www.tamtam.ai/l/manufacturers-isere) (178)
- [Multinational companies in the Isère department](https://www.tamtam.ai/l/multinational-companies-isere) (174)
- [Hardware manufacturers in the Isère department](https://www.tamtam.ai/l/hardware-companies-isere) (143)
- [Retail chains in the Isère department](https://www.tamtam.ai/l/retail-chains-isere) (100)
- [Software Development companies in the Isère department](https://www.tamtam.ai/l/software-development-companies-isere) (90)
- [Professional services firms in the Isère department](https://www.tamtam.ai/l/professional-services-firms-isere) (87)
- [Public sector organisations in the Isère department](https://www.tamtam.ai/l/public-sector-organisations-isere) (80)
- [Distributors and wholesalers in the Isère department](https://www.tamtam.ai/l/distributors-and-wholesalers-isere) (78)
- [IT services companies in the Isère department](https://www.tamtam.ai/l/it-services-companies-isere) (75)
- [SaaS companies in the Isère department](https://www.tamtam.ai/l/saas-companies-isere) (72)
- [Electronics and semiconductor companies in the Isère department](https://www.tamtam.ai/l/electronics-companies-isere) (70)
- [Contract manufacturers in the Isère department](https://www.tamtam.ai/l/contract-manufacturers-isere) (68)
- [IT Services and IT Consulting companies in the Isère department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-isere) (68)
- [Family-owned companies in the Isère department](https://www.tamtam.ai/l/family-owned-companies-isere) (61)
- [Industrial Machinery Manufacturing companies in the Isère department](https://www.tamtam.ai/l/industrial-machinery-manufacturing-companies-isere) (58)
- [Consulting firms in the Isère department](https://www.tamtam.ai/l/consulting-firms-isere) (57)
- [Construction companies in the Isère department](https://www.tamtam.ai/l/construction-companies-isere) (52)
- [Pharmaceutical companies in the Isère department](https://www.tamtam.ai/l/pharmaceutical-companies-isere) (47)
- [Education providers in the Isère department](https://www.tamtam.ai/l/education-companies-isere) (46)
- [Medical device companies in the Isère department](https://www.tamtam.ai/l/medical-device-companies-isere) (43)
- [Critical infrastructure operators in the Isère department](https://www.tamtam.ai/l/critical-infrastructure-operators-isere) (41)
- [Energy companies in the Isère department](https://www.tamtam.ai/l/energy-companies-isere) (41)
- [Chemical companies in the Isère department](https://www.tamtam.ai/l/chemical-companies-isere) (40)

## The same list elsewhere in France

- [The largest companies in France](https://www.tamtam.ai/l/largest-companies-france) (90,813)
- [The largest companies in Île-de-France](https://www.tamtam.ai/l/largest-companies-ile-de-france) (36,143)
- [The largest companies in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/largest-companies-auvergne-rhone-alpes) (11,033)
- [The largest companies in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/largest-companies-provence-alpes-cote-dazur) (6,699)
- [The largest companies in Occitanie](https://www.tamtam.ai/l/largest-companies-occitanie) (5,769)
- [The largest companies in Grand Est](https://www.tamtam.ai/l/largest-companies-grand-est) (5,700)
- [The largest companies in Nouvelle-Aquitaine](https://www.tamtam.ai/l/largest-companies-nouvelle-aquitaine) (5,460)
- [The largest companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/largest-companies-hauts-de-seine) (5,160)
- [The largest companies in the Rhône department](https://www.tamtam.ai/l/largest-companies-rhone) (4,813)
- [The largest companies in Hauts-de-France](https://www.tamtam.ai/l/largest-companies-hauts-de-france) (4,505)
- [The largest companies in Pays de la Loire](https://www.tamtam.ai/l/largest-companies-pays-de-la-loire) (4,269)
- [The largest companies in the Bouches-du-Rhône department](https://www.tamtam.ai/l/largest-companies-bouches-du-rhone) (3,318)
- [The largest companies in Brittany](https://www.tamtam.ai/l/largest-companies-brittany) (3,058)
- [The largest companies in the Nord department](https://www.tamtam.ai/l/largest-companies-nord) (2,806)
- [The largest companies in the Gironde department](https://www.tamtam.ai/l/largest-companies-gironde) (2,435)
- [The largest companies in the Haute-Garonne department](https://www.tamtam.ai/l/largest-companies-haute-garonne) (2,406)
- [The largest companies in Normandy](https://www.tamtam.ai/l/largest-companies-normandy) (2,380)
- [The largest companies in the Loire-Atlantique department](https://www.tamtam.ai/l/largest-companies-loire-atlantique) (2,046)
- [The largest companies in Bourgogne-Franche-Comté](https://www.tamtam.ai/l/largest-companies-bourgogne-franche-comte) (1,867)
- [The largest companies in Centre-Val de Loire](https://www.tamtam.ai/l/largest-companies-centre-val-de-loire) (1,701)
- [The largest companies in the Alpes-Maritimes department](https://www.tamtam.ai/l/largest-companies-alpes-maritimes) (1,538)
- [The largest companies in Paris](https://www.tamtam.ai/l/largest-companies-paris) (22,790)
- [The largest companies in Lyon](https://www.tamtam.ai/l/largest-companies-lyon) (2,679)
- [The largest companies in Toulouse](https://www.tamtam.ai/l/largest-companies-toulouse) (1,565)

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Source: https://www.tamtam.ai/l/largest-companies-isere