# The 100 largest companies in the Ain department

Tamtam tracks 511 companies headquartered in the Ain department. This list ranks the 100 largest by number of employees on LinkedIn, led by AKWEL, Chausson Matériaux and Groupe Martin Belaysoud. Their median headcount is 150. Half of them were founded in 1968 or later. The most common headquarters are Bourg-en-Bresse (21) and Oyonnax (8).

The largest companies in Ain are primarily mid-sized to large firms with a strong presence in industrial supplies, automotive components, and construction materials. Key players include AKWEL and MGI Coutier, both specializing in automotive fluid management and mechanisms. Chausson Matériaux distributes construction materials, while Groupe Martin Belaysoud and Téréva focus on professional wholesale distribution.

Several companies, such as Groupe Martin Belaysoud, Téréva, and Mabéo Industries, share a founding year of 1829, indicating a historical cluster of business development in the region. Bourg-en-Bresse stands out as a central hub, hosting the headquarters of many of these established businesses, including wholesale distributors and public services like Département de l'Ain.

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

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [AKWEL](https://www.tamtam.ai/c/akwel) (akwel-automotive.com)<br>Designs and manufactures automotive components, specializing in fluid management and mechanisms, using plastic, rubber, metal, and electronics for global customers. | Motor Vehicle Manufacturing | 🇫🇷 Champfromier | 3,468 | 1972 |
| 2 | [Chausson Matériaux](https://www.tamtam.ai/c/chausson-materiaux) (chausson.fr)<br>Family-owned independent distributor specializing in construction materials, emphasizing honesty, reliability, and strong customer relationships with professionals. | Retail | 🇫🇷 Saint-Alban | 2,720 | 1921 |
| 3 | [Groupe Martin Belaysoud](https://www.tamtam.ai/c/groupe-martin-belaysoud) (martin-belaysoud.com)<br>The company, established since 1829, specializes in professional distribution with a national presence and innovative e-commerce sites They focus on strong values and personalized relationships with clients | Wholesale | 🇫🇷 Bourg-en-Bresse | 2,115 | 1829 |
| 4 | [Téréva](https://www.tamtam.ai/c/tereva) (tereva.fr)<br>French company specializing in heating and plumbing supplies, providing essential products for industrial and residential heating and plumbing needs. | Wholesale | 🇫🇷 Bourg-en-Bresse | 1,241 | 1829 |
| 5 | [Groupe Desautel](https://www.tamtam.ai/c/groupe-desautel) (desautel.fr)<br>Specializes in fire protection with extensive services including extinguishers, automatic detection, smoke extraction, safety lighting, risk studies, special vehicles, and training. | Fire Protection | 🇫🇷 Montluel | 922 | 1932 |
| 6 | [FRANCE AIR](https://www.tamtam.ai/c/france-air) (france-air.com)<br>Design and distribution of air treatment systems for commercial, industrial buildings, residential, professional kitchens, hospitals, and clean rooms. | Wholesale Building Materials | 🇫🇷 Beynost | 774 | 1960 |
| 7 | [MGI Coutier](https://www.tamtam.ai/c/mgi-coutier) (akwel-automotive.com)<br>Designs, develops, and manufactures automotive components, specializing in fluid management and mechanisms, utilizing plastic, rubber, metal, and electronics technologies. | Motor Vehicle Manufacturing | 🇫🇷 Champfromier | 725 | 1972 |
| 8 | [GROUPE BERNARD](https://www.tamtam.ai/c/groupe-bernard-bourg-en-bresse) (groupe-bernard.fr)<br>Family-owned group, major distributor of various car, industrial, and utility vehicle brands across multiple French regions, with 127 sales points. | Retail Motor Vehicles | 🇫🇷 Bourg-en-Bresse | 657 | 1921 |
| 9 | [Secondary school in agriculture : Lycée agricole Auxerre La brosse (89)](https://www.tamtam.ai/c/secondary-school-in-agriculture-lycee-agricole-auxerre-la-brosse-89) (cfppa-cibeins.com)<br>This public training center supports adult learners in rural development, vocational training, and local initiatives in specific regions, offering various specialized courses | Education Administration Programs | 🇫🇷 Belley | 641 | 1957 |
| 10 | [Mabéo Industries](https://www.tamtam.ai/c/mabeo-industries-bourg-en-bresse) (mabeo-industries.com)<br>Responsible distributor of personal protective equipment and industrial supplies offering technical solutions, maintenance support, and extensive product ranges through omnichannel commerce systems. | Wholesale | 🇫🇷 Bourg-en-Bresse | 571 | 1829 |
| 11 | [Advanced Accelerator Applications](https://www.tamtam.ai/c/advanced-accelerator-applications) (siemens-healthineers.com)<br>Development, manufacturing, testing, and supply of radiopharmaceutical products for PET imaging, focusing on oncology and expanding into neurology. | Pharmaceutical Manufacturing | 🇫🇷 Saint Genis Pouilly | 570 | 2002 |
| 12 | [Département de l'Ain](https://www.tamtam.ai/c/departement-de-l-ain) (ain.fr)<br>Provides social services, infrastructure maintenance, education, cultural promotion, and supports mobility and territorial development for over 650,000 residents. | Government Administration | 🇫🇷 Bourg-en-Bresse | 561 |  |
| 13 | [Azureva](https://www.tamtam.ai/c/azureva) (azureva-vacances.com)<br>With over 70 years of experience, this company specializes in offering stays in villages, hotels, and tourist residences across 31 destinations in France | Travel Arrangements | 🇫🇷 Bourg-en-Bresse | 501 | 1952 |
| 14 | [Centre psychothérapique de l'Ain](https://www.tamtam.ai/c/centre-psychotherapique-de-l-ain) (cpa01.fr)<br>Provides comprehensive mental health services, including prevention, diagnosis, treatment, and psychosocial rehabilitation, across general psychiatry, child psychiatry, and gerontopsychiatry for the Ain department. | Mental Health Care | 🇫🇷 Bourg-en-Bresse | 487 | 1971 |
| 15 | [ISERBA](https://www.tamtam.ai/c/iserba) (iserba.fr)<br>A national leader in social housing maintenance, offering a wide range of services with 800 employees across 25 agencies in France | Construction | 🇫🇷 Beynost | 473 | 1978 |
| 16 | [ORAPI Hygiène](https://www.tamtam.ai/c/orapi-hygiene) (orapihygiene.fr)<br>Design, manufacture, and distribution of effective, sustainable hygiene, disinfection, and maintenance products protecting people and environment globally. | Chemical Manufacturing | 🇫🇷 Saint-Vulbas | 473 | 1968 |
| 17 | [Ets Georges David - EDA plastiques](https://www.tamtam.ai/c/ets-georges-david-eda-plastiques) (groupe-eda.com)<br>Development and manufacturing of innovative, practical, sustainable plastic products for houseware, garden, and outdoor leisure sectors in France. | Manufacturing | 🇫🇷 Oyonnax | 470 | 1946 |
| 18 | [ALFA3A](https://www.tamtam.ai/c/alfa3a) (alfa3a.org)<br>A social organization supporting communities through various services like housing assistance, youth programs, career integration, legal aid, and cultural access | Non-profit Organizations | 🇫🇷 Ambérieu-En-Bugey | 465 | 1971 |
| 19 | [DUQUEINE Group](https://www.tamtam.ai/c/duqueine-group) (duqueine.fr)<br>Develops and manufactures composite materials for the aerospace industry, focusing on innovative solutions and market growth. Specializes in advanced composite applications. | Aviation and Aerospace Component Manufacturing | 🇫🇷 Massieux | 454 |  |
| 20 | [Centre Hospitalier de Bourg-en-Bresse](https://www.tamtam.ai/c/centre-hospitalier-de-bourg-en-bresse) (ch-bourg-en-bresse.fr)<br>Provides comprehensive medical, surgical, and obstetrical care across seven clinical areas, serving over 300,000 residents in the Ain region. | Hospitals and Health Care | 🇫🇷 Bourg-en-Bresse | 423 |  |
| 21 | [Ligne Roset](https://www.tamtam.ai/c/ligne-roset) (ligne-roset.com)<br>Design, manufacture, and distribution of contemporary furniture, lighting, textiles, rugs, and decorative accessories for a complete lifestyle. | Furniture and Home Furnishings Manufacturing | 🇫🇷 Briord | 395 | 1860 |
| 22 | [AW - Systèmes de Levage](https://www.tamtam.ai/c/aw-systemes-de-levage) (awpontroulant.fr)<br>A French manufacturer specializing in lifting systems with expertise in design, fabrication, sales, and maintenance, aiming for continued growth | Machinery Manufacturing | 🇫🇷 Civrieux | 375 | 2004 |
| 23 | [SEMCODA](https://www.tamtam.ai/c/semcoda) (semcoda.com)<br>Constructs and manages social rental housing. Develops land and acts as a property developer, providing housing solutions for individuals, professionals, and local communities. | Real Estate | 🇫🇷 Bourg-en-Bresse | 370 | 1959 |
| 24 | [Grosfillex Group](https://www.tamtam.ai/c/grosfillex-group) (grosfillex-expert.com)<br>This company specializes in furnishing and remodeling indoor and outdoor spaces with French designer products for homes, businesses, and public venues worldwide | Construction | 🇫🇷 Arbent | 358 | 1927 |
| 25 | [SDIS de l'Ain - SDIS 01](https://www.tamtam.ai/c/sdis-de-l-ain-sdis-01) (sdis01.fr)<br>Emergency response team ensuring safety of people, property, and environment through firefighting and rescue operations in Ain region. | Public Safety | 🇫🇷 Bourg-en-Bresse | 343 | 1997 |
| 26 | [Adapei de l'Ain](https://www.tamtam.ai/c/adapei-de-l-ain) (adapei01.fr)<br>Nonprofit association supporting mentally disabled individuals through care, advocacy, family support, and social integration across multiple specialized facilities. | Civic and Social Organizations | 🇫🇷 Bourg-en-Bresse | 316 | 1961 |
| 27 | [World Medical Association](https://www.tamtam.ai/c/world-medical-association) (wma.net)<br>An international organization representing physicians, advocating for ethical standards and independence in medical care, with 115 National Medical Associations as members | Medical Practices | 🇫🇷 Ferney-Voltaire | 314 | 1947 |
| 28 | [BISCUITS BOUVARD](https://www.tamtam.ai/c/biscuits-bouvard) (biscuits-bouvard.com)<br>Family business creates balanced, organic cereal products: cookies, cakes, and snacks. They partner with other businesses, offering expertise and a wide product range. | Food and Beverage Manufacturing | 🇫🇷 Ceyzeriat | 311 | 1902 |
| 29 | [MAPEI France](https://www.tamtam.ai/c/mapei-france) (mapei.com)<br>A family-owned Italian company specializing in building solutions and decoration, with a strong international presence and a focus on innovation and quality | Chemical Manufacturing | 🇫🇷 Saint-Alban | 301 | 1989 |
| 30 | [Astr'​in](https://www.tamtam.ai/c/astr-in) (transports-astrin.com)<br>Providing tailored transport and logistics solutions across Europe with expert teams, dedicated vehicles, and a strong focus on client satisfaction and environmental responsibility. | Truck Transportation | 🇫🇷 Saint-Vulbas | 286 | 2002 |
| 31 | [LISI MEDICAL](https://www.tamtam.ai/c/lisi-medical) (lisi-group.com)<br>Subcontractor specializing in industrial manufacture of orthopedic, trauma, spinal, and dental implants and instruments for leading companies globally. Proactive project management, production capacities, quality system, customer support. | Medical Equipment Manufacturing | 🇫🇷 Neyron | 270 | 1777 |
| 32 | [Fermob](https://www.tamtam.ai/c/fermob) (fermob.com)<br>A renowned designer and manufacturer of colorful outdoor furniture, parasols, and LED lighting, creating unique and attractive outdoor spaces worldwide | Furniture and Home Furnishings Manufacturing | 🇫🇷 Thoissey | 268 |  |
| 33 | [SGB \| HÜNNEBECK Brand France](https://www.tamtam.ai/c/sgb-hunnebeck-brand-france) (brandfrance.fr)<br>provides scaffolding, formwork, and industrial safety services through globally recognized brands focusing on construction and infrastructure sectors | Construction | 🇫🇷 Trévoux | 253 | 1853 |
| 34 | [Agroalimentaire Recrutement](https://www.tamtam.ai/c/agroalimentaire-recrutement) (agroalimentaire-recrutement.com)<br>Specialized recruitment agency for the entire agri-food sector in the Auvergne Rhône-Alpes and South-East Bourgogne Franche-Comté regions | Food and Beverage Manufacturing | 🇫🇷 Bourg-en-Bresse | 238 |  |
| 35 | [Grand Bourg Agglomération](https://www.tamtam.ai/c/grand-bourg-agglomeration) (grandbourg.fr)<br>Manages a territory of 74 communes, 135,000 inhabitants. Provides public services, infrastructure, economic development, and cultural, sports, and leisure offerings. | Government Administration | 🇫🇷 Bourg-en-Bresse | 234 | 2017 |
| 36 | [Tubesca-Comabi](https://www.tamtam.ai/c/tubesca-comabi) (tubesca-comabi.com)<br>Specializes in standard and custom access and height work solutions for construction, industrial maintenance, and aerospace sectors globally. | Construction | 🇫🇷 Trévoux | 230 | 1954 |
| 37 | [SPI Group : SPI Services / SPI Logistic](https://www.tamtam.ai/c/spi-group-spi-services-spi-logistic) (spigroup.fr)<br>Providing high-value packaging and logistics services with integrated engineering, automation, and quality for food, cosmetic, pharmaceutical sectors. | Transportation, Logistics, Supply Chain and Storage | 🇫🇷 Saint-Vulbas | 225 | 1985 |
| 38 | [Autobernard](https://www.tamtam.ai/c/autobernard) (autobernard.com)<br>Autobernard is a professional automotive distribution brand offering new and used vehicles, aftersales services, and a network of 73 concessions across several regions | Motor Vehicle Manufacturing | 🇫🇷 Bourg-en-Bresse | 225 | 1921 |
| 39 | [Toray Films Europe](https://www.tamtam.ai/c/toray-films-europe) (torayfilms.eu)<br>Manufacturer and supplier of BOPET and BOPP films for electronics, energy, furniture, graphics, medical, packaging, and luxury product applications. | Plastics Manufacturing | 🇫🇷 Saint-Maurice-de-Beynost | 211 | 1926 |
| 40 | [STEEP Plastique](https://www.tamtam.ai/c/steep-plastique) (steep-plastique.com)<br>Injection moulding of engineering thermoplastics for automotive applications, focusing on lightweight, integrated functions for thermal, hybrid, and electric vehicles. | Plastics and Rubber Product Manufacturing | 🇫🇷 Saint-Maurice-de-Beynost | 198 | 1969 |
| 41 | [N2JSoft, administrative and HR softwares](https://www.tamtam.ai/c/n2jsoft-administrative-and-hr-softwares) (keeple.com)<br>Fintech software publisher. Supports companies with administrative and HR process digitalization and optimization. Optimizes HR processes for over 10,000 companies in 72 countries. | Software Development | 🇫🇷 Montagnat | 196 | 2015 |
| 42 | [GERAL](https://www.tamtam.ai/c/geral) (geral.com)<br>Design and manufacture of custom electrical and electronic equipment for industrial machine automation and power supply with multi-technical integration. | Electrical Equipment Manufacturing | 🇫🇷 Belley | 195 | 1970 |
| 43 | [EX'AL](https://www.tamtam.ai/c/ex-al) (exal-sas.fr)<br>Specializing in aluminum extrusion, the company aims to provide advanced products and services with eco-friendly processes and state-of-the-art equipment | Manufacturing | 🇫🇷 Saint-Vulbas | 184 | 2020 |
| 44 | [Groupe ISERBA Invest](https://www.tamtam.ai/c/groupe-iserba-invest) (groupeiserba.fr)<br>Specializes in multi-technical maintenance services for residential properties across France, ensuring efficient upkeep and repair solutions. | Construction | 🇫🇷 Beynost | 179 | 1978 |
| 45 | [CODEP](https://www.tamtam.ai/c/codep) (codep.fr)<br>Family-owned company providing services to professionals in electrical, appliances, and personal protective equipment (PPE) industries | Wholesale | 🇫🇷 Bourg-en-Bresse | 169 | 1958 |
| 46 | [LGR Packaging](https://www.tamtam.ai/c/lgr-packaging) (lgr-packaging.com)<br>A European manufacturer specializing in litho-printed cardboard packaging, offering solidboard folding cartons, laminated boxes, leaflets, and rigid boxes across multiple sites | Packaging and Containers Manufacturing | 🇫🇷 Oyonnax | 160 |  |
| 47 | [BRESSOR SA](https://www.tamtam.ai/c/bressor-sa)<br>A food production company based in Servas, France, specializing in the manufacturing of various food products in the Auvergne-Rhône-Alpes region | Food and Beverage Manufacturing | 🇫🇷 Servas | 159 |  |
| 48 | [MICHAUD](https://www.tamtam.ai/c/michaud) (michaud.fr)<br>The company provides low-voltage electrical distribution network managers and installers with connection solutions for aerial and underground connections, electric vehicle charging, and distribution panels | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Pont-d'Ain | 158 |  |
| 49 | [F2A](https://www.tamtam.ai/c/f2a) (f2a.fr)<br>Specializing in aeraulic and acoustic solutions for HVAC professionals, offering a range of products and customized solutions for various industries | Industrial Machinery Manufacturing | 🇫🇷 Dagneux | 156 | 1994 |
| 50 | [FRANCIA](https://www.tamtam.ai/c/francia) (francia.fr)<br>French plastic injection company offering end-to-end services from design to production, with expertise in various sectors and focus on quality, innovation, and team collaboration | Plastics Manufacturing | 🇫🇷 Bellignat | 150 | 1908 |
| 51 | [IPC Centre Technique Industriel de la Plasturgie et des Composites](https://www.tamtam.ai/c/ipc-centre-technique-industriel-de-la-plasturgie-et-des-composites) (ct-ipc.com)<br>A technical and innovation center specializing in composites and thermoplastic injection for the plastics industry, offering high-value R&D, services, and industrial transfers | Plastics Manufacturing | 🇫🇷 Bellignat | 149 | 2016 |
| 52 | [Stratus Packaging](https://www.tamtam.ai/c/stratus-packaging) (stratuspackaging.com)<br>European leader in printed label manufacturing offering a wide range of product package designs including wrap-around labels, adhesive, sleeves, IML, and flexible packages. | Printing Services | 🇫🇷 Viriat | 147 |  |
| 53 | [OKTEO](https://www.tamtam.ai/c/okteo) (okteo.fr)<br>Digital Services company specializing in Agritech, Industry, and SMEs Offers software solutions, digital transformation, IT consulting, and innovation services with a focus on client collaboration and future sustainability | IT Services and IT Consulting | 🇫🇷 Ceyzériat | 143 | 1971 |
| 54 | [GLOBAL DISTRIBUTION](https://www.tamtam.ai/c/global-distribution) (global-distrib.com)<br>Specializes in distributing new and used spare parts for industrial vehicles, using electronic catalogs for precise part identification and ordering. | Wholesale | 🇫🇷 Certines | 143 | 2006 |
| 55 | [GERGONNE INDUSTRIE - THE ADHESIVE SOLUTION](https://www.tamtam.ai/c/gergonne-industrie-the-adhesive-solution) (gergonne.com)<br>An independent French industrial group specializing in manufacturing and converting adhesive tapes and die-cut items for various markets globally | Chemical Manufacturing | 🇫🇷 Oyonnax | 141 | 1962 |
| 56 | [COTELAC](https://www.tamtam.ai/c/cotelac) (cotelac.fr)<br>French fashion brand known for unique designer clothing with meticulous attention to fabric treatments Offers women's and men's lines with artistic collaborations worldwide | Retail Apparel and Fashion | 🇫🇷 Ambérieu-en-Bugey | 138 | 1993 |
| 57 | [TIFLEX](https://www.tamtam.ai/c/tiflex) (tiflex.com)<br>providing marking, traceability, screen printing, and digital printing solutions to over 7,000 clients in more than 70 countries | Printing Services | 🇫🇷 Poncin | 135 | 1897 |
| 58 | [ADAPA01](https://www.tamtam.ai/c/adapa01) (adapa01.fr)<br>Provider of in-home care services in Ain, supporting elderly, ill, and disabled individuals to stay at home with quality assistance, care, and support | Individual and Family Services | 🇫🇷 Bourg-en-Bresse | 132 | 1959 |
| 59 | [Georges Blanc](https://www.tamtam.ai/c/georges-blanc) (georgesblanc.com)<br>Gastronomy group offering Michelin-starred restaurant, brasseries, hotels, bakery, and boutiques focused on quality, tradition, and luxury. | Restaurants | 🇫🇷 Vonnas | 131 | 1872 |
| 60 | [SOLUSTIL](https://www.tamtam.ai/c/solustil)<br>Specialized in sheet metal work, offering high-quality solutions from basic parts to complex functions for various industries through innovation and industrial integration | Manufacturing | 🇫🇷 La Boisse | 129 | 2000 |
| 61 | [Roland Monterrat](https://www.tamtam.ai/c/roland-monterrat) (monterrat-traiteur.fr)<br>Leading producer of pies expanding into sandwich and catering markets, focusing on innovation, quality, and brand development. | Food and Beverage Manufacturing | 🇫🇷 Feillens | 124 | 1984 |
| 62 | [BÉABA](https://www.tamtam.ai/c/beaba) (beaba.com)<br>Innovative baby products for parents and children, focusing on design and technology Ensuring safety, functionality, and ergonomics in every item | Manufacturing | 🇫🇷 Oyonnax | 117 | 1989 |
| 63 | [Groupe Bernard](https://www.tamtam.ai/c/groupe-bernard) (bernard-groupe.com)<br>Support producers of cereals, fruits, vegetables, and vineyards with supply, grain collection, and tailored services focused on innovation and performance. | Farming | 🇫🇷 Saint-André-de-Corcy | 117 | 1922 |
| 64 | [FAAB FABRICAUTO](https://www.tamtam.ai/c/faab-fabricauto) (faabfabricauto.com)<br>Leading provider of innovative vehicle registration solutions in France, leveraging group synergies and financial stability for growth. | Motor Vehicle Manufacturing | 🇫🇷 Viriat | 117 | 1962 |
| 65 | [CPAM de l'Ain](https://www.tamtam.ai/c/cpam-de-l-ain) (assurance-maladie.ameli.fr)<br>Working within a culture of results, this organization serves over 585,000 insured individuals in the healthcare sector, emphasizing gender equality and professional growth | Government Administration | 🇫🇷 Bourg-en-Bresse | 113 | 1945 |
| 66 | [Adduxi](https://www.tamtam.ai/c/adduxi) (adduxi.com)<br>Family-owned international company providing industrial solutions, particularly in the automotive industry Specializing in product development, production process optimization, cost efficiency, quality, and innovation | Motor Vehicle Manufacturing | 🇫🇷 Bellignat | 113 | 1996 |
| 67 | [COVERGUARD](https://www.tamtam.ai/c/coverguard) (coverguard-safety.com)<br>Design, manufacture, and distribute a wide range of original, comfortable, and reliable personal protective equipment for workplace safety. | Wholesale | 🇫🇷 Mionnay | 112 | 1994 |
| 68 | [BERNARD TRUCKS](https://www.tamtam.ai/c/bernard-trucks) (bernardtrucks.com)<br>automotive company located in Bourg en Bresse, France, specializing in trucks and related automotive services and products. | Motor Vehicle Manufacturing | 🇫🇷 Bourg-en-Bresse | 111 |  |
| 69 | [CLINIQUE CONVERT](https://www.tamtam.ai/c/clinique-convert) (clinique-convert-bourg-en-bresse.ramsaysante.fr)<br>Established in 1919, this multidisciplinary healthcare facility within Ramsay Santé group offers high-quality diverse care with evolving technology, led by skilled staff | Hospitals and Health Care | 🇫🇷 Bourg-en-Bresse | 111 | 1919 |
| 70 | [AIRVANCE Group](https://www.tamtam.ai/c/airvance-group) (airvancegroup.com)<br>A leading supplier of HVAC products in Europe, providing high-quality solutions and raising awareness about indoor air quality | Wholesale Building Materials | 🇫🇷 Beynost | 109 | 1994 |
| 71 | [CENTRE HOSPITALIER DU HAUT BUGEY](https://www.tamtam.ai/c/centre-hospitalier-du-haut-bugey) (ch-hautbugey.fr)<br>Multispecialty hospital providing medical, surgical, pediatric, obstetric, emergency, long-term care, outpatient services, diagnostics, and professional training. | Hospitals and Health Care | 🇫🇷 Oyonnax | 106 | 2002 |
| 72 | [JIVA HILL RESORT](https://www.tamtam.ai/c/jiva-hill-resort) (jivahill.com)<br>Offers luxurious rooms and suites on a private estate, with modern design, upscale amenities, and views of mountains or golf courses. | Hospitality | 🇫🇷 Crozet | 104 | 2007 |
| 73 | [Tecmaplast](https://www.tamtam.ai/c/tecmaplast) (tecmaplast.fr)<br>French industrial company specialized in designing and manufacturing technical and appearance parts in thermoplastics by injection for automotive, electrical, and railway sectors | Manufacturing | 🇫🇷 Martignat | 103 | 1979 |
| 74 | [ACG-SYNERGIES](https://www.tamtam.ai/c/acg-synergies) (acg-synergies.fr)<br>ACG-SYNERGIES provides specialized IT tools and services for the Social Housing sector, offering cost-effective solutions through collaboration and expertise | Software Development | 🇫🇷 Bourg-en-Bresse | 98 | 1971 |
| 75 | [Pays de Gex agglo](https://www.tamtam.ai/c/pays-de-gex-agglo) (paysdegexagglo.fr)<br>Pays de Gex agglomeration community manages regional development and services for 27 communes, focusing on early childhood, transport, waste management, and environmental conservation | Government Administration | 🇫🇷 Gex | 98 | 1996 |
| 76 | [Applexion](https://www.tamtam.ai/c/applexion) (applexion.com)<br>The company specializes in purification equipment and services focused on reducing carbon footprint, increasing efficiency, and optimizing production processes for industrial clients worldwide | Engineering Services | 🇫🇷 Saint-Maurice-de-Beynost | 97 | 1968 |
| 77 | [Domaine de Divonne - Groupe Partouche](https://www.tamtam.ai/c/domaine-de-divonne-groupe-partouche) (domainedivonne.com)<br>A Resort in Divonne-les-Bains offering a 4* Hotel, Casino, Golf course, restaurants, spa, tennis court, and pool serviced by 300 employees | Hospitality | 🇫🇷 Divonne-les-Bains | 96 | 1886 |
| 78 | [Billon](https://www.tamtam.ai/c/billon-dagneux) (billon.com)<br>French company specializing in creating and manufacturing fabrics, with a focus on technical fabrics for military, aerospace, and automotive industries Fully integrated from design to finishing | Textile Manufacturing | 🇫🇷 Dagneux | 96 | 1904 |
| 79 | [PRATICIMA](https://www.tamtam.ai/c/praticima) (praticima.com)<br>Design and manufacture of custom medical equipment and solutions supporting hospitals, healthcare facilities, and pharmacies with innovative, reliable French-made products. | Medical Equipment Manufacturing | 🇫🇷 Reyrieux | 95 | 1985 |
| 80 | [SAMARO](https://www.tamtam.ai/c/samaro) (samaro.fr)<br>A trading company since 1976, specializing in industrial applications such as dispensing systems, lubricants, adhesives, sealants, encapsulants, and anti-corrosion products Headquarters in Beynost, France | Chemical Manufacturing | 🇫🇷 Beynost | 95 | 1976 |
| 81 | [Monnet-Sève Sougy](https://www.tamtam.ai/c/monnet-seve-sougy) (monnet-seve.com)<br>A French family-owned company specializing in softwood sawing, optimizing and enhancing French wood to support various projects with passionate wood and forest enthusiasts. | Paper and Forest Product Manufacturing | 🇫🇷 Outriaz | 93 | 1929 |
| 82 | [Base aérienne 278 / Atelier industriel de l'aéronautique - Ambérieu-en-Bugey](https://www.tamtam.ai/c/base-aerienne-278-atelier-industriel-de-l-aeronautique-amberieu-en-bugey) (rejoignezlesiae.defense.gouv.fr)<br>Industrial workshop specializing in aeronautics at Ambérieu-en-Bugey, offering expertise in metrology, information systems, safety, and aeronautical equipment maintenance Part of SIAé, a French aeronautical support leader | Armed Forces | 🇫🇷 Ambérieu-en-Bugey | 93 | 1910 |
| 83 | [Football Bourg-en-Bresse Péronnas (FBBP 01)](https://www.tamtam.ai/c/football-bourg-en-bresse-peronnas-fbbp-01) (fbbp01.fr)<br>Professional French football club established in 1942, currently competing in the National 2 league, focusing on competitive football. | Spectator Sports | 🇫🇷 Péronnas | 91 | 1942 |
| 84 | [BOURGEOIS_PATRIMOINE - VINCI Construction](https://www.tamtam.ai/c/bourgeois-patrimoine-vinci-construction) (bourgeois-entreprise.fr)<br>Specializing in design and construction of roofs, Bourgeois provides personalized solutions for public and private projects using a variety of materials Partnered with VINCI Construction | Construction | 🇫🇷 Miribel | 90 |  |
| 85 | [AFPMA](https://www.tamtam.ai/c/afpma) (afpma.fr)<br>An industrial training and consulting center specializing in technology, management, and HR, dedicated to developing the skills of young professionals and job seekers for regional employability | Professional Training and Coaching | 🇫🇷 Péronnas | 89 | 1961 |
| 86 | [OOGarden](https://www.tamtam.ai/c/oogarden) (oogarden.com)<br>An e-commerce company specializing in outdoor products for homes, founded in 2006 and rapidly expanding through strategic investments and logistic developments | Retail | 🇫🇷 Ambérieu-En-Bugey | 88 | 2006 |
| 87 | [PI INSTALL](https://www.tamtam.ai/c/pi-install) (groupepiinstall.com)<br>Design and installation of cleanrooms, cold rooms, fireproof and acoustic solutions for pharmaceutical, food, healthcare, and industrial sectors. | Construction | 🇫🇷 Montrevel-En-Bresse | 87 | 2001 |
| 88 | [MIHB](https://www.tamtam.ai/c/mihb) (mihb.com)<br>Specializing in thermoplastic material transformation, this company excels in designing high-value technical parts and offers expertise in various advanced technologies | Plastics Manufacturing | 🇫🇷 Groissiat | 86 | 1968 |
| 89 | [SERIPLAST](https://www.tamtam.ai/c/seriplast) (seriplast.fr)<br>Manufacturer of packaging plastic for cosmetics brands since 1966, specializing in thermoplastic injection and decoration of bottles, ampoules, roll-on, and pillboxes | Plastics Manufacturing | 🇫🇷 Oyonnax | 84 | 1966 |
| 90 | [Hôpital Privé d'Ambérieu - ELSAN](https://www.tamtam.ai/c/hopital-prive-d-amberieu-elsan) (elsan.care)<br>A multidisciplinary private hospital offering surgical, medical, imaging, emergency, and maternity services with a focus on quality patient care and accessibility | Hospitals and Health Care | 🇫🇷 Ambérieu-en-Bugey | 84 |  |
| 91 | [BILLION Injection Molding Machinery](https://www.tamtam.ai/c/billion-injection-molding-machinery) (billion.fr)<br>Design and manufacture injection molding machines including all-electric, hybrid, hydraulic types with multi-injection technology for various industrial sectors. | Machinery Manufacturing | 🇫🇷 Oyonnax | 84 | 1949 |
| 92 | [Francioli](https://www.tamtam.ai/c/francioli) (francioli.fr)<br>With over 35 years of experience, the company designs and installs aesthetic, reliable, and sustainable urban furniture solutions while prioritizing safety and environmental concerns | Construction | 🇫🇷 Chaleins | 84 | 1984 |
| 93 | [Lindab France](https://www.tamtam.ai/c/lindab-france) (lindab.fr)<br>Manufacture and distribute ventilation and air treatment solutions, support clients with technical advice, marketing, and institutional collaboration in France. | Wholesale Building Materials | 🇫🇷 Montluel | 83 | 1959 |
| 94 | [Urban Café](https://www.tamtam.ai/c/urban-cafe) (residence-la-reserve.com)<br>restaurant company located in Ferney Voltaire, France, specializing in providing dining experiences and food services to customers. | Restaurants | 🇫🇷 Ferney-Voltaire | 79 |  |
| 95 | [RUIZ](https://www.tamtam.ai/c/ruiz) (ruiz-btp.com)<br>A construction company specializing in renovations, restructuring, and new builds, prioritizing reactivity, methodology, constant communication, and innovation for 49 years | Construction | 🇫🇷 Dagneux | 78 | 1969 |
| 96 | [BIOSPHERES](https://www.tamtam.ai/c/biospheres) (biospheresgroup.com)<br>Simplifying, securing agroecological transition; agriculture that produces, protects, regenerates ecosystem functions. Providing strategic support through regenerative agriculture to meet economic, social, environmental challenges. | Farming | 🇫🇷 Ambérieu-En-Bugey | 77 | 2020 |
| 97 | [Clayens Healthcare](https://www.tamtam.ai/c/clayens-healthcare) (clayens.com)<br>A Healthcare support company offering development, manufacturing, and regulatory compliance services for medical/pharmaceutical devices and plastic components worldwide | Medical Equipment Manufacturing | 🇫🇷 Izernore | 76 | 1986 |
| 98 | [Transports de l'Ain](https://www.tamtam.ai/c/transports-de-l-ain) (transportsdelain.fr)<br>A transport company in Ain with 9 agencies, 520 vehicles, and 600 employees, providing various services such as school transport, regular transport, and more | Ground Passenger Transportation | 🇫🇷 Bourg-en-Bresse | 76 | 1919 |
| 99 | [Jacomex](https://www.tamtam.ai/c/jacomex) (jacomex.com)<br>Specializes in designing and manufacturing glove boxes, isolators, and purification units for controlled environment applications and contamination prevention. | Machinery Manufacturing | 🇫🇷 Dagneux | 75 | 1945 |
| 100 | [Haut-Bugey Agglomération](https://www.tamtam.ai/c/haut-bugey-agglomeration) (hautbugey-agglomeration.fr)<br>Intercommunal structure uniting 42 communes, fostering economic growth and quality of life in a leading European plastics industry region. | Government Administration | 🇫🇷 Oyonnax | 74 | 2018 |

## 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 Ain department

- [Manufacturers in the Ain department](https://www.tamtam.ai/l/manufacturers-ain) (98)
- [Companies with in-house R&D in the Ain department](https://www.tamtam.ai/l/r-and-d-companies-ain) (90)
- [Multinational companies in the Ain department](https://www.tamtam.ai/l/multinational-companies-ain) (73)
- [Contract manufacturers in the Ain department](https://www.tamtam.ai/l/contract-manufacturers-ain) (64)
- [Hardware manufacturers in the Ain department](https://www.tamtam.ai/l/hardware-companies-ain) (53)
- [Plastics Manufacturing companies in the Ain department](https://www.tamtam.ai/l/plastics-manufacturing-companies-ain) (53)
- [Chemical companies in the Ain department](https://www.tamtam.ai/l/chemical-companies-ain) (51)
- [Family-owned companies in the Ain department](https://www.tamtam.ai/l/family-owned-companies-ain) (46)
- [Construction companies in the Ain department](https://www.tamtam.ai/l/construction-companies-ain) (42)
- [Distributors and wholesalers in the Ain department](https://www.tamtam.ai/l/distributors-and-wholesalers-ain) (41)
- [Retail chains in the Ain department](https://www.tamtam.ai/l/retail-chains-ain) (38)

## 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-ain