# The 100 largest companies in the Ille-et-Vilaine department

Tamtam tracks 1,454 companies headquartered in the Ille-et-Vilaine department. This list ranks the 100 largest by number of employees on LinkedIn, led by Groupama Loire Bretagne, Groupe SAMSIC and Groupe Le Duff. Their median headcount is 502. Half of them were founded in 1982 or later. The most common headquarters are Rennes (52), Saint-Malo (8) and Cesson-Sévigné (5).

The largest employers in Ille-et-Vilaine primarily operate in services, including insurance, healthcare, and public administration, alongside significant representation from food manufacturing and education. Notable companies include Groupama Loire Bretagne, a mutual insurance company; Groupe Le Duff, a world leader in bakery and catering; Vivalto Santé, operating a network of healthcare facilities; and Ouest-France, a regional newspaper publisher.

The data shows a strong concentration of headquarters in Rennes, the departmental capital, indicating its role as a key economic hub. Companies like Groupe SAMSIC (business consulting), CHU de Rennes (hospital services), and Université de Rennes I (research services) contribute to a diverse economic landscape that balances established institutions with companies founded more recently.

🇫🇷 Ille-et-Vilaine · 100 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Groupama Loire Bretagne](https://www.tamtam.ai/c/groupama-loire-bretagne) (groupama-gan-recrute.com)<br>A leading mutual insurance company in the region, fostering trust and supporting members to build their lives confidently through a strong local presence and collaborative culture | Insurance | 🇫🇷 Rennes | 28,000 |  |
| 2 | [Groupe SAMSIC](https://www.tamtam.ai/c/groupe-samsic) (samsic.com)<br>With over 30 years of experience, we prioritize human and professional values while offering tailored solutions in facility management and HR services | Business Consulting and Services | 🇫🇷 Cesson-Sévigné | 6,680 | 1986 |
| 3 | [Groupe Le Duff](https://www.tamtam.ai/c/groupe-le-duff) (groupeleduff.com)<br>World leader in bakery, pastry, and catering, operating restaurant chains, manufacturing premium products for hotels, prioritizing high-quality, healthy dishes globally. | Food and Beverage Manufacturing | 🇫🇷 Rennes | 5,761 | 1976 |
| 4 | [Vivalto Santé](https://www.tamtam.ai/c/vivalto-sante) (vivalto-sante.fr)<br>Operates a network of healthcare facilities across Europe, providing comprehensive patient care. Engages in medical partnerships and sustainable practices. | Hospitals and Health Care | 🇫🇷 Saint-Grégoire | 4,612 | 2009 |
| 5 | [Université de Rennes I](https://www.tamtam.ai/c/universite-de-rennes-i) (univ-rennes.fr)<br>Multidisciplinary university focusing on dynamic research, lifelong learning, societal challenges, and regional socio-economic and cultural development through partnerships. | Research Services | 🇫🇷 Rennes | 4,002 | 2022 |
| 6 | [CHU de Rennes](https://www.tamtam.ai/c/chu-de-rennes) (chu-rennes.fr)<br>Large French public hospital offering extensive medical, surgical, and obstetrical services, advanced diagnostics, research, and medical training to the population. | Hospitals and Health Care | 🇫🇷 Rennes | 3,470 |  |
| 7 | [Banque Populaire Grand Ouest](https://www.tamtam.ai/c/banque-populaire-grand-ouest) (banquepopulaire.fr)<br>Cooperative regional bank supporting entrepreneurs, artisans, and businesses across seven departments, fostering economic development through financial and human expertise. | Banking | 🇫🇷 Saint-Grégoire | 2,642 |  |
| 8 | [Ouest-France](https://www.tamtam.ai/c/ouest-france) (ouest-france.fr)<br>Publishing extensive regional news across Brittany, Normandy, and Pays de la Loire with multiple print editions and digital platforms. | Newspaper Publishing | 🇫🇷 Rennes | 2,507 | 1944 |
| 9 | [Université Rennes 2](https://www.tamtam.ai/c/universite-rennes-2) (univ-rennes2.fr)<br>Higher education and research focused on arts, humanities, social sciences, languages, communication, psychology, education, sociology, geography, history, and sports. | Higher Education | 🇫🇷 Rennes | 2,286 |  |
| 10 | [C-Log - L'Expertise Supply Chain](https://www.tamtam.ai/c/c-log-l-expertise-supply-chain) (clog.fr)<br>Provides tailored supply chain solutions for fashion brands, including retail, e-commerce, international transport, customs, and continuous improvement consulting services. | Transportation, Logistics, Supply Chain and Storage | 🇫🇷 Saint-Malo | 2,276 | 2002 |
| 11 | [Legendre](https://www.tamtam.ai/c/legendre) (groupe-legendre.com)<br>A family-owned company with over 2300 employees and €850 million in revenue, focusing on construction, real estate, and energy sectors nationally and internationally | Construction | 🇫🇷 Rennes | 1,951 | 1946 |
| 12 | [Groupe Beaumanoir](https://www.tamtam.ai/c/groupe-beaumanoir) (groupe-beaumanoir.com)<br>A leading pioneer in women's ready-to-wear products, operating four successful brands worldwide with a strong focus on sales and logistics services | Textile Manufacturing | 🇫🇷 Saint-Malo | 1,870 | 1981 |
| 13 | [Rennes Ville et Métropole](https://www.tamtam.ai/c/rennes-ville-et-metropole) (rennes.fr)<br>Fosters economic, urban development, attracting talent and students. Provides diverse public services through 5300 agents, focusing on quality of life and professional growth. | Government Administration | 🇫🇷 Rennes | 1,828 |  |
| 14 | [Del Arte](https://www.tamtam.ai/c/del-arte) (delarte.fr)<br>operates a chain of Italian restaurants across France, offering dine-in, takeaway, and delivery with authentic, quality Italian dishes for all budgets. | Restaurants | 🇫🇷 Rennes | 1,824 | 1984 |
| 15 | [Solina](https://www.tamtam.ai/c/solina) (solina.com)<br>Designing customized food solutions with enhanced taste, nutrition, and functionality for food industry, service, butchery, and nutrition sectors worldwide. | Food and Beverage Manufacturing | 🇫🇷 Bréal-sous-Montfort | 1,537 |  |
| 16 | [Région Bretagne](https://www.tamtam.ai/c/region-bretagne) (bretagne.bzh)<br>Elected assembly managing Brittany's daily life and future through education, transport, economic development, planning, culture, sports, and environment. | Government Administration | 🇫🇷 Rennes | 1,529 |  |
| 17 | [Brioche Dorée](https://www.tamtam.ai/c/brioche-doree) (briochedoree.fr)<br>A fast-food chain specializing in French-style bakery products and sandwiches, operating globally with a focus on fresh, locally sourced ingredients and a modern concept. | Food and Beverage Manufacturing | 🇫🇷 Rennes | 1,477 | 1976 |
| 18 | [EHESP - École des hautes études en santé publique](https://www.tamtam.ai/c/ehesp-ecole-des-hautes-etudes-en-sante-publique) (ehesp.fr)<br>A public institution offering a wide range of training programs in public health, with a strong focus on research and international partnerships | Higher Education | 🇫🇷 Rennes | 1,474 |  |
| 19 | [Crédit Agricole d'Ille-et-Vilaine](https://www.tamtam.ai/c/credit-agricole-d-ille-et-vilaine) (credit-agricole.fr)<br>Provides banking and financial services to over 530,000 clients with 119 branches and 1,500 employees in Ille-et-Vilaine. | Banking | 🇫🇷 Saint-Jacques-de-la-Lande | 1,332 |  |
| 20 | [L'Orange bleue](https://www.tamtam.ai/c/l-orange-bleue) (lorangebleue-group.com)<br>Leading European fitness company operating over 400 clubs offering cardio, strength training, wellness programs, personalized coaching, and innovative group classes. | Wellness and Fitness Services | 🇫🇷 Rennes | 1,083 | 1996 |
| 21 | [Interaction Interim](https://www.tamtam.ai/c/interaction-interim) (interaction-interim.com)<br>National network providing temporary work, recruitment for fixed-term and permanent contracts, training, support, and consulting services across all business sectors. | Staffing and Recruiting | 🇫🇷 Rennes | 1,055 | 1991 |
| 22 | [SOCIETE DES TRANSPORTS GAUTIER](https://www.tamtam.ai/c/societe-des-transports-gautier) (stg-logistique.fr)<br>Transports food products, offering comprehensive, personalized services, focusing on proximity, reactivity, and food safety, with just-in-time deliveries across Europe. | Truck Transportation | 🇫🇷 Noyal-sur-Vilaine | 1,039 | 1949 |
| 23 | [Département d'Ille-et-Vilaine](https://www.tamtam.ai/c/departement-d-ille-et-vilaine) (ille-et-vilaine.fr)<br>Management of social services, education, infrastructure, environment, and culture with a focus on solidarity and regional development. | Government Administration | 🇫🇷 Rennes | 994 |  |
| 24 | [Rennes School of Business](https://www.tamtam.ai/c/rennes-school-of-business) (rennes-sb.com)<br>International business school focusing on educating responsible entrepreneurs through English programs, international partnerships, research, innovation, executive training, and hands-on experience | Higher Education | 🇫🇷 Rennes | 937 |  |
| 25 | [Adapei 35](https://www.tamtam.ai/c/adapei-35) (adapei35.com)<br>A medico-social association supporting over 2850 individuals with disabilities through 64 facilities in Ille-et-Vilaine, with a workforce of 1600 professionals | Civic and Social Organizations | 🇫🇷 Rennes | 824 | 1961 |
| 26 | [Académie de Rennes](https://www.tamtam.ai/c/academie-de-rennes) (ac-rennes.fr)<br>Official regional education authority managing national education services and policies across the Brittany region including four departments. | Government Administration | 🇫🇷 Rennes | 809 |  |
| 27 | [Hellowork](https://www.tamtam.ai/c/hellowork) (hellowork.com)<br>digital platforms for employment, recruitment, training, and HR solutions, connecting candidates with jobs and training, supporting businesses and educational institutions. | Technology, Information and Internet | 🇫🇷 Rennes | 807 | 2000 |
| 28 | [Kersia, inventing a food safe world](https://www.tamtam.ai/c/kersia-inventing-a-food-safe-world) (kersia-group.com)<br>Global biosecurity and food safety, preventing disease and contamination in animals and humans across the food supply chain, including healthcare. | Chemical Manufacturing | 🇫🇷 Dinard | 797 |  |
| 29 | [Groupe Convivio](https://www.tamtam.ai/c/groupe-convivio) (convivio.fr)<br>Family-owned catering group specializing in collective food services, leading in western France with strong client adaptation and responsive teams. | Food and Beverage Services | 🇫🇷 Bédée | 790 | 1982 |
| 30 | [CLPS L'enjeu compétences](https://www.tamtam.ai/c/clps-l-enjeu-competences) (clps.net)<br>Provides professional training, career support, and consulting services to employees and job seekers across western France, focusing on local needs. | Technical and Vocational Training | 🇫🇷 Le Rheu | 757 | 1980 |
| 31 | [INNOVAL](https://www.tamtam.ai/c/innoval) (innoval.com)<br>Cooperative providing personalized advisory, health, reproduction, and genetics services to livestock farmers for improved performance and sustainability. | Farming | 🇫🇷 Noyal-sur-Vilaine | 732 |  |
| 32 | [ADDITI](https://www.tamtam.ai/c/additi) (ouest-france.fr)<br>Local advertising and media company focusing on digital innovation, client orientation, and professional development within a strong regional group. | Advertising Services | 🇫🇷 Rennes | 729 |  |
| 33 | [Olga](https://www.tamtam.ai/c/olga) (olga.fr)<br>Family-owned food company specializing in organic dairy and plant-based products, promoting ecological and societal food transition since 1951. | Food and Beverage Manufacturing | 🇫🇷 Noyal-sur-Vilaine | 700 | 1951 |
| 34 | [ABER Propreté](https://www.tamtam.ai/c/aber-proprete) (aberproprete.fr)<br>Providing high-quality industrial cleaning and hygiene services with continuous employee training and precise service monitoring since 1975. | Environmental Services | 🇫🇷 Saint-Jacques-de-la-Lande | 682 | 1975 |
| 35 | [CENTRE HOSPITALIER GUILLAUME REGNIER](https://www.tamtam.ai/c/centre-hospitalier-guillaume-regnier) (ch-guillaumeregnier.fr)<br>Provides prevention, diagnosis, treatment, rehabilitation, social reintegration, research, and education in adult and child psychiatry sectors. | Hospitals and Health Care | 🇫🇷 Rennes | 679 |  |
| 36 | [Solano](https://www.tamtam.ai/c/solano) (groupe-solano.fr)<br>Since 2007, this company specializes in recruiting temporary and permanent staff for the transportation and logistics industry | Staffing and Recruiting | 🇫🇷 Noyal-Châtillon-sur-Seiche | 614 | 2007 |
| 37 | [Askoria](https://www.tamtam.ai/c/askoria) (askoria.eu)<br>The company provides training and guidance to social intervention professionals, aiming to create a more just, supportive, and sustainable society | Higher Education | 🇫🇷 Rennes | 581 | 2013 |
| 38 | [Cerfrance Brocéliande](https://www.tamtam.ai/c/cerfrance-broceliande) (cerfrance-broceliande.fr)<br>Provides specialized accounting services and strategic business advice to company managers and organizations located throughout the Ille-et-Vilaine and Morbihan regions of France. | Accounting | 🇫🇷 Rennes | 572 |  |
| 39 | [TIMAC AGRO France](https://www.tamtam.ai/c/timac-agro-france) (timacagro.fr)<br>Inspired by nature, improves natural resources, plant and animal nutrition for efficient, sustainable agriculture, enhancing agricultural performance. | Farming | 🇫🇷 Saint-Malo | 557 | 1959 |
| 40 | [AFTEC](https://www.tamtam.ai/c/aftec) (aftec.fr)<br>The company offers various educational paths (BTS, specialization, Master) in collaboration with hundreds of partner companies for hands-on learning | Higher Education | 🇫🇷 Rennes | 547 | 1989 |
| 41 | [Arkéa Banque Entreprises et Institutionnels](https://www.tamtam.ai/c/arkea-banque-entreprises-et-institutionnels) (arkea-banque-ei.com)<br>Specializes in providing tailored financial solutions, credit, and advisory services to businesses and institutional clients across various sectors. | Banking | 🇫🇷 Saint-Grégoire | 546 | 1986 |
| 42 | [Stade Rennais F.C.](https://www.tamtam.ai/c/stade-rennais-f-c) (staderennais.com)<br>Professional football club offering corporate services including ticketing, hospitality, event organization, conferences, salons, and team building activities. | Spectator Sports | 🇫🇷 Rennes | 545 | 1901 |
| 43 | [PANPHARMA](https://www.tamtam.ai/c/panpharma) (panpharma.eu)<br>Develops, produces, and commercializes generic injectable medicines for hospitals and clinics in France and over 75 countries, specializing in antibiotics, anesthetics, and analgesics. | Pharmaceutical Manufacturing | 🇫🇷 Luitré-Dompierre | 534 | 1983 |
| 44 | [Groupe PIGEON](https://www.tamtam.ai/c/groupe-pigeon) (groupe-pigeon.com)<br>Independent family group involved in territorial development in the western region, focusing on urban planning and infrastructure projects | Construction | 🇫🇷 Louvigné-de-Bais | 526 | 1929 |
| 45 | [NET PLUS](https://www.tamtam.ai/c/net-plus) (net-plus.fr)<br>A company specializing in cleaning services, prioritizing customer satisfaction, quality interventions, and social responsibility with a focus on employee well-being and respect | Facilities Services | 🇫🇷 Cesson-Sévigné | 521 | 1990 |
| 46 | [DIANA](https://www.tamtam.ai/c/diana) (symrise.com)<br>A global supplier of fragrances, flavors, food, nutrition, and cosmetic ingredients, acquired by Symrise Group For updates, follow Symrise AG page | Food and Beverage Manufacturing | 🇫🇷 Rennes | 517 |  |
| 47 | [Groupe Valeor](https://www.tamtam.ai/c/groupe-valeor) (groupevaleor.com)<br>Development and operation of specialized stores focused on enhancing living spaces with inspiration, pleasure, and environmental respect, employing over 600 people. | Retail | 🇫🇷 Rennes | 511 | 2008 |
| 48 | [SOCIETE VITREENNE D'ABATTAGE JEAN ROZE](https://www.tamtam.ai/c/societe-vitreenne-d-abattage-jean-roze) (recrutement.agromousquetaires.com)<br>Leading French distributor brand manufacturer, Agromousquetaires, with 70 sites specializes in beef and sheep meat processing, promoting "Better Production for Better Living" | Food and Beverage Manufacturing | 🇫🇷 Vitré | 511 | 1955 |
| 49 | [Sanders Nutrition animale](https://www.tamtam.ai/c/sanders-nutrition-animale) (sanders.fr)<br>French leader in animal nutrition providing tailored solutions to livestock production sectors with a focus on value, sustainability, and local support | Food and Beverage Manufacturing | 🇫🇷 Bruz | 504 | 1910 |
| 50 | [Le Roy Logistique](https://www.tamtam.ai/c/le-roy-logistique) (leroylogistique.com)<br>Provider of tailored national and international transport and logistics solutions with 70 years of experience and strong customer relationships. | Transportation, Logistics, Supply Chain and Storage | 🇫🇷 Saint-Jacques-de-la-Lande | 502 | 1947 |
| 51 | [Groupe Loste](https://www.tamtam.ai/c/groupe-loste) (groupe-loste.fr)<br>French family-owned network manufacturing and distributing premium deli products, catering specialties, and charcuterie to food professionals, butchers, bakers, and local retailers. | Food and Beverage Manufacturing | 🇫🇷 Bédée | 500 | 1866 |
| 52 | [SIB \[numérique, santé et secteur public\]](https://www.tamtam.ai/c/sib-numerique-sante-et-secteur-public) (sib.fr)<br>Innovative cooperative in digital health and public sector, serving 620+ institutions in modernizing their IT systems with a wide range of services and expertise | IT Services and IT Consulting | 🇫🇷 Rennes | 499 | 1993 |
| 53 | [IRS](https://www.tamtam.ai/c/irs) (i-r-s.fr)<br>A partner to economic players and market research firms, offering recognized quantitative and qualitative field studies for 30 years across France | Market Research | 🇫🇷 Rennes | 487 | 1988 |
| 54 | [INSA Rennes](https://www.tamtam.ai/c/insa-rennes) (insa-rennes.nous-recrutons.fr)<br>Provides five-year post-baccalaureate engineering education with strong research in information technologies and materials science in Brittany, France. | Higher Education | 🇫🇷 Rennes | 483 | 1966 |
| 55 | [RBI](https://www.tamtam.ai/c/rbi-rennes) (rbi-informatique.fr)<br>Specializing in information systems design, implementation, and integration, RBI-Informatique offers services in infrastructure, collaboration, and management solutions for businesses | IT Services and IT Consulting | 🇫🇷 Rennes | 468 | 1981 |
| 56 | [EMO](https://www.tamtam.ai/c/emo) (emo-france.com)<br>Global provider of customized water and sludge treatment solutions for wastewater, drinking water, and industrial effluents with a dedicated in-house laboratory and worldwide distribution network | Industrial Machinery Manufacturing | 🇫🇷 Noyal-sur-Vilaine | 463 |  |
| 57 | [Lycée Jeanne d'Arc - Rennes](https://www.tamtam.ai/c/lycee-jeanne-d-arc-rennes) (essfa.fr)<br>The company provides education and training programs ranging from high school level to university level in various fields such as technology, healthcare, social services, and business | Education | 🇫🇷 Rennes | 463 |  |
| 58 | [Office Notarial Anastasia Moreau](https://www.tamtam.ai/c/office-notarial-anastasia-moreau) (moreau-fougeres.notaires.fr)<br>Located in the heart of Fougères, this company offers legal services in real estate, family, and corporate law, focusing on accessibility, listening, and modernity | Legal Services | 🇫🇷 Fougères | 447 |  |
| 59 | [Blot Immobilier](https://www.tamtam.ai/c/blot-immobilier) (blot-immobilier.fr)<br>Providing personalized real estate services including buying, selling, renting, financing, legal advice, and professional support with local expertise and client focus. | Real Estate | 🇫🇷 Rennes | 439 | 1967 |
| 60 | [Chambre d'agriculture de Bretagne](https://www.tamtam.ai/c/chambre-d-agriculture-de-bretagne) (bretagne.chambres-agriculture.fr)<br>Representing farmers, providing expertise to public services and local authorities, supporting farmers in business development and professional adaptation. | Farming | 🇫🇷 Rennes | 439 | 1942 |
| 61 | [Ville de Saint-Malo](https://www.tamtam.ai/c/ville-de-saint-malo) (saint-malo.fr)<br>Historic coastal city offering rich cultural events, maritime activities, diverse tourism facilities, and serving as a key transport and sports hub. | Government Administration | 🇫🇷 Saint-Malo | 438 |  |
| 62 | [Groupe ANGEVIN](https://www.tamtam.ai/c/groupe-angevin) (groupe-angevin.fr)<br>A family-owned construction group specializing in structural work, founded in 1936 Consists of seven distinct companies with a total revenue of €215 million | Construction | 🇫🇷 Noyal-Châtillon-sur-Seiche | 433 | 1936 |
| 63 | [Carsat Bretagne](https://www.tamtam.ai/c/carsat-bretagne) (carsat-bretagne.fr)<br>French social security body, retirement benefits, occupational risk prevention, support for vulnerable individuals, senior citizens' assistance. Regional economic player. | Government Administration | 🇫🇷 Rennes | 418 |  |
| 64 | [M-extend](https://www.tamtam.ai/c/m-extend) (m-extend.com)<br>Family-run group since 1951, specializing in agricultural handling solutions Integrated design to production process, emphasis on innovation, sustainability, and international growth | Farming | 🇫🇷 Acigné | 415 | 1951 |
| 65 | [EME](https://www.tamtam.ai/c/eme) (ecole-eme.com)<br>Dedicated to developing industrial environmental engineering skills through training, academic and applied research, and knowledge dissemination via conferences and student publications. | Higher Education | 🇫🇷 Bruz | 414 | 1992 |
| 66 | [Cache Cache](https://www.tamtam.ai/c/cache-cache) (cache-cache.fr)<br>French ready-to-wear brand offering trendy, colorful, and affordable fashion for joyful and optimistic women, part of a leading retail group. | Retail | 🇫🇷 Saint-Malo | 408 | 1985 |
| 67 | [Faculté des Métiers](https://www.tamtam.ai/c/faculte-des-metiers) (fac-metiers.fr)<br>Offers vocational apprenticeship training across 12 sectors, certifying 64 professions with 108 diplomas for over 3,600 young individuals and 3,000 adults annually. | Professional Training and Coaching | 🇫🇷 Bruz | 395 | 1999 |
| 68 | [SDIS 35 -Service départemental d'incendie et de secours d'Ille-et-Vilaine](https://www.tamtam.ai/c/sdis-35-service-departemental-d-incendie-et-de-secours-d-ille-et-vilaine) (sapeurs-pompiers35.fr)<br>The company is a public department in charge of emergency rescue missions, risk analysis, emergency response coordination, prevention, and firefighting | Public Safety | 🇫🇷 Rennes | 394 |  |
| 69 | [Espacil](https://www.tamtam.ai/c/espacil) (espacil.com)<br>Support local authorities with urban renewal, population diversity, economic development, and manage 26,000 rental homes in France regions. | Housing Programs | 🇫🇷 Rennes | 375 | 1956 |
| 70 | [Keolis Rennes Métropole](https://www.tamtam.ai/c/keolis-rennes-metropole) (keolis-rennes-metropole.com)<br>Manages and operates various urban transport networks in Rennes, including buses and metros, with a focus on daily passenger services. | Urban Transit Services | 🇫🇷 Rennes | 368 | 1990 |
| 71 | [CCPA GROUP](https://www.tamtam.ai/c/ccpa-group) (ccpa.com)<br>Develops, manufactures, and distributes animal nutrition and health products including premixes and feed additives, offering zootechnical support to feed manufacturers globally. | Farming | 🇫🇷 Janzé | 367 | 1966 |
| 72 | [CATALYS Conseil](https://www.tamtam.ai/c/catalys-conseil) (catalys-conseil.fr)<br>CATALYS Conseil is a consulting firm specializing in HR strategy and management, offering services in career development, organizational transformation, and employment training policies | Business Consulting and Services | 🇫🇷 Saint-Jacques-de-la-Lande | 366 | 1989 |
| 73 | [Groupe actu](https://www.tamtam.ai/c/groupe-actu) (publihebdos.actu.fr)<br>Publishing regional weekly newspapers and operating a powerful multi-local news platform, providing local information and communication across France. | Newspaper Publishing | 🇫🇷 Rennes | 358 | 1997 |
| 74 | [Fondation AUB Santé](https://www.tamtam.ai/c/fondation-aub-sante) (aub-sante.fr)<br>Nonprofit healthcare organization specializing in chronic kidney disease treatment, home care services, and professional training in dialysis and patient support. | Hospitals and Health Care | 🇫🇷 Pacé | 353 | 1971 |
| 75 | [Additi Média \| Groupe Ouest-France](https://www.tamtam.ai/c/additi-media-groupe-ouest-france) (additimedia.ouest-france.fr)<br>Marketing expertise for local media and markets in Grand Ouest, offering tailored press and digital communication strategies and advertising solutions. | Advertising Services | 🇫🇷 Rennes | 352 |  |
| 76 | [Guillemot Corporation](https://www.tamtam.ai/c/guillemot-corporation) (guillemot.com)<br>Design and manufacture interactive entertainment hardware and accessories under Hercules and Thrustmaster brands, distributing products worldwide with focus on growth markets. | Computer Hardware Manufacturing | 🇫🇷 Rennes | 349 | 1984 |
| 77 | [Traiteur de Paris](https://www.tamtam.ai/c/traiteur-de-paris) (traiteurdeparis.com)<br>Production of high-quality French delicacies, desserts, and culinary aids using traditional methods and freezing for global export. | Food and Beverage Manufacturing | 🇫🇷 Cesson-Sévigné | 336 | 1993 |
| 78 | [NEOTOA](https://www.tamtam.ai/c/neotoa) (neotoa.fr)<br>Management and construction of social and affordable housing in urban and rural Brittany, focusing on innovation, sustainability, and community support. | Real Estate | 🇫🇷 Rennes | 324 | 1921 |
| 79 | [Aäsgard](https://www.tamtam.ai/c/aasgard) (aasgard.fr)<br>Specializing in high-end contemporary wood and pellet stoves from Scandinavia, Aäsgard offers distribution, installation, and maintenance services since 2006 Follow on social media for more | Furniture and Home Furnishings Manufacturing | 🇫🇷 Rennes | 323 | 2006 |
| 80 | [SQUARE HABITAT BRETAGNE](https://www.tamtam.ai/c/square-habitat-bretagne) (squarehabitat.fr)<br>Trusted real estate agency network offering personalized services and innovative solutions for buying, selling, renting, and investing in properties | Real Estate | 🇫🇷 Betton | 317 | 2006 |
| 81 | [Groupe Lamotte](https://www.tamtam.ai/c/groupe-lamotte) (lamotte.fr)<br>Company specializes in real estate, covering construction, management, operation, and rental investment across various property segments with integrated team expertise. | Real Estate | 🇫🇷 Saint-Jacques-de-la-Lande | 317 | 1955 |
| 82 | [Groupe Hospitalier Rance-Emeraude](https://www.tamtam.ai/c/groupe-hospitalier-rance-emeraude) (gh-re.fr)<br>Healthcare network including hospitals in Saint-Malo, Dinan, and Cancale, providing emergency, surgery, medicine, obstetrics, and elderly care services. | Hospitals and Health Care | 🇫🇷 Saint-Malo | 316 |  |
| 83 | [BDS](https://www.tamtam.ai/c/bds-rennes) (bds-restaurant.com)<br>A sports bar offering a cozy atmosphere for watching games, enjoying apéros, tea time, brunch, and more, with upcoming locations in Vern-sur-Seiche and Pacé | Restaurants | 🇫🇷 Rennes | 316 | 2014 |
| 84 | [TIMAC AGRO International](https://www.tamtam.ai/c/timac-agro-international) (timacagro.com)<br>Provides precise, innovative, complete nutritional solutions for soils, plants, and animals, supporting farmers globally for over 65 years. | Farming | 🇫🇷 Saint-Malo | 314 | 1959 |
| 85 | [Bonobo](https://www.tamtam.ai/c/bonobo) (bonoboplanet.com)<br>Offering authentic and affordable jeans for an optimistic and engaged generation, promoting values of respect and harmony through a new denim spirit | Textile Manufacturing | 🇫🇷 Saint-Malo | 313 | 2006 |
| 86 | [Geirec](https://www.tamtam.ai/c/geirec) (geirec.com)<br>An independent regional cabinet with a national focus, GEIREC supports businesses with expertise and values, offering daily partnership, confidentiality, competence, and responsiveness | Accounting | 🇫🇷 Rennes | 308 | 1979 |
| 87 | [Groupe GIBOIRE](https://www.tamtam.ai/c/groupe-giboire) (giboire.com)<br>Family-owned real estate group specializing in property development, land planning, hospitality, sales, rental management, commercial real estate, and investment advisory. | Real Estate | 🇫🇷 Rennes | 302 | 1923 |
| 88 | [Aiguillon construction](https://www.tamtam.ai/c/aiguillon-construction) (aiguillon-construction.fr)<br>Design, manage, and sell affordable housing for low-income individuals, focusing on quality service, territorial balance, and environmental responsibility. | Real Estate | 🇫🇷 Rennes | 296 | 1902 |
| 89 | [Groupe MARC](https://www.tamtam.ai/c/groupe-marc) (marc-sa.fr)<br>Public works, building construction, civil engineering, quarry operation, scaffolding, environmental services, and metallic construction across the Grand Ouest region. | Construction | 🇫🇷 Pleurtuit | 291 | 1876 |
| 90 | [DELIVER](https://www.tamtam.ai/c/deliver) (deliver.events)<br>Facilitating pre-qualified meetings between retail and brand decision makers with logistics vendors, along with thought leadership content on sustainability and supply chain challenges globally | Events Services | 🇫🇷 Rennes | 280 | 2015 |
| 91 | [Institut d'études politiques de Rennes](https://www.tamtam.ai/c/institut-d-etudes-politiques-de-rennes) (sciencespo-rennes.fr)<br>An institution of higher education providing multidisciplinary training to students for roles in public, private, and non-profit sectors, nationally and internationally | Higher Education | 🇫🇷 Rennes | 277 | 1991 |
| 92 | [SPC](https://www.tamtam.ai/c/spc-parthenay-de-bretagne) (servicepro-bretagne.com)<br>This company specializes in industrial automation and robotics, supporting integrators and manufacturers in their projects with expert guidance. | Automation Machinery Manufacturing | 🇫🇷 Parthenay-de-Bretagne | 277 | 2016 |
| 93 | [Saviel France - AGROMOUSQUETAIRES](https://www.tamtam.ai/c/saviel-france-agromousquetaires) (recrutement.agromousquetaires.com)<br>Agromousquetaires is the manufacturing division of Les Mousquetaires Group, producing private label meat products in France with a focus on quality and sustainability | Food and Beverage Manufacturing | 🇫🇷 Janzé | 275 | 1992 |
| 94 | [Hoppen](https://www.tamtam.ai/c/hoppen) (hoppen.care)<br>Hoppen - Time to Care provides innovative, customizable digital solutions for healthcare facilities, improving patient experience, staff efficiency, and overall performance | Hospitals and Health Care | 🇫🇷 Cesson-Sévigné | 274 | 2011 |
| 95 | [Broadpeak](https://www.tamtam.ai/c/broadpeak) (broadpeak.tv)<br>Broadpeak specializes in designing and manufacturing video delivery components for IPTV, Cable, and OTT services, enhancing quality of experience for subscribers worldwide | Software Development | 🇫🇷 Cesson-Sévigné | 269 | 2010 |
| 96 | [Regional Interim - R Interim Groupe Triangle Solutions RH](https://www.tamtam.ai/c/regional-interim-r-interim-groupe-triangle-solutions-rh) (triangle.fr)<br>Family-run recruitment agency providing personalized interim staffing solutions, rapid client response, and extensive support for temporary workers and companies. | Human Resources Services | 🇫🇷 Rennes | 268 | 1996 |
| 97 | [PHOSPHEA](https://www.tamtam.ai/c/phosphea) (phosphea.com)<br>Specializing in phosphorus and calcium solutions for animal nutrition, this company is a global player with a production capacity exceeding 1 Mt | Chemical Manufacturing | 🇫🇷 Dinard | 268 | 1976 |
| 98 | [Clinique Mutualiste La Sagesse](https://www.tamtam.ai/c/clinique-mutualiste-la-sagesse) (clinique-rennes.fr)<br>A healthcare facility with 220 beds and over 550 professionals offering specialized care in mother-child, cancer surgeries, medical specialties, and chronic pain management | Hospitals and Health Care | 🇫🇷 Rennes | 268 |  |
| 99 | [CAPEOS](https://www.tamtam.ai/c/capeos-rennes) (capeos.fr)<br>Provides comprehensive accounting, legal, and tax services alongside audit, wealth management, and IT solutions for companies across diverse sectors through local offices. | Accounting | 🇫🇷 Rennes | 266 | 1979 |
| 100 | [OET](https://www.tamtam.ai/c/oet-betton) (groupe-ovalt.com)<br>Independent service company specializing in MES, automation, robotics, electrical systems, and weighing with turnkey solutions and maintenance across multiple sites. | Automation Machinery Manufacturing | 🇫🇷 Betton | 266 | 1975 |

## 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 the Ille-et-Vilaine department

- [Companies with in-house R&D in the Ille-et-Vilaine department](https://www.tamtam.ai/l/r-and-d-companies-ille-et-vilaine) (152)
- [Retail chains in the Ille-et-Vilaine department](https://www.tamtam.ai/l/retail-chains-ille-et-vilaine) (135)
- [Multinational companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/multinational-companies-ille-et-vilaine) (118)
- [Manufacturers in the Ille-et-Vilaine department](https://www.tamtam.ai/l/manufacturers-ille-et-vilaine) (100)
- [Professional services firms in the Ille-et-Vilaine department](https://www.tamtam.ai/l/professional-services-firms-ille-et-vilaine) (94)
- [SaaS companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/saas-companies-ille-et-vilaine) (85)
- [Family-owned companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/family-owned-companies-ille-et-vilaine) (81)
- [Software Development companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/software-development-companies-ille-et-vilaine) (80)
- [Public sector organisations in the Ille-et-Vilaine department](https://www.tamtam.ai/l/public-sector-organisations-ille-et-vilaine) (75)
- [IT Services and IT Consulting companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-ille-et-vilaine) (67)
- [IT services companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/it-services-companies-ille-et-vilaine) (65)
- [Hardware manufacturers in the Ille-et-Vilaine department](https://www.tamtam.ai/l/hardware-companies-ille-et-vilaine) (61)
- [Education providers in the Ille-et-Vilaine department](https://www.tamtam.ai/l/education-companies-ille-et-vilaine) (60)
- [Distributors and wholesalers in the Ille-et-Vilaine department](https://www.tamtam.ai/l/distributors-and-wholesalers-ille-et-vilaine) (58)
- [Consulting firms in the Ille-et-Vilaine department](https://www.tamtam.ai/l/consulting-firms-ille-et-vilaine) (54)
- [Food and Beverage Manufacturing companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/food-and-beverage-manufacturing-companies-ille-et-vilaine) (46)
- [Retail companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/retail-companies-ille-et-vilaine) (46)
- [Critical infrastructure operators in the Ille-et-Vilaine department](https://www.tamtam.ai/l/critical-infrastructure-operators-ille-et-vilaine) (45)
- [Financial services firms in the Ille-et-Vilaine department](https://www.tamtam.ai/l/financial-services-firms-ille-et-vilaine) (45)
- [Subscription businesses in the Ille-et-Vilaine department](https://www.tamtam.ai/l/subscription-businesses-ille-et-vilaine) (45)
- [Construction companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/construction-companies-ille-et-vilaine) (43)
- [Law Practice companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/law-practice-companies-ille-et-vilaine) (43)
- [Higher Education companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/higher-education-companies-ille-et-vilaine) (41)
- [Legal Services companies in the Ille-et-Vilaine department](https://www.tamtam.ai/l/legal-services-companies-ille-et-vilaine) (41)

## The same list elsewhere in France

- [The largest companies in France](https://www.tamtam.ai/l/largest-companies-france) (90,812)
- [The largest companies in Île-de-France](https://www.tamtam.ai/l/largest-companies-ile-de-france) (36,142)
- [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) (6,698)
- [The largest companies in Occitanie](https://www.tamtam.ai/l/largest-companies-occitanie) (5,767)
- [The largest companies in Grand Est](https://www.tamtam.ai/l/largest-companies-grand-est) (5,706)
- [The largest companies in Nouvelle-Aquitaine](https://www.tamtam.ai/l/largest-companies-nouvelle-aquitaine) (5,459)
- [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) (4,266)
- [The largest companies in the Bouches-du-Rhône department](https://www.tamtam.ai/l/largest-companies-bouches-du-rhone) (3,317)
- [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) (2,404)
- [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) (2,044)
- [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) (22,789)
- [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) (1,563)

## The same list elsewhere

- [The largest companies in the world](https://www.tamtam.ai/l/largest-companies-in-the-world) (415,122)
- [The largest companies in Europe](https://www.tamtam.ai/l/largest-companies-in-europe) (213,553)

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Source: https://www.tamtam.ai/l/largest-companies-ille-et-vilaine