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.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Groupama Loire Bretagnegroupama-gan-recrute.com
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 |
28,000 | |||
| 2 |
Groupe SAMSICsamsic.com
With over 30 years of experience, we prioritize human and professional values while offering tailored solutions in facility management and HR services |
6,680 | |||
| 3 |
Groupe Le Duffgroupeleduff.com
World leader in bakery, pastry, and catering, operating restaurant chains, manufacturing premium products for hotels, prioritizing high-quality, healthy dishes globally. |
5,761 | |||
| 4 |
Vivalto Santévivalto-sante.fr
Operates a network of healthcare facilities across Europe, providing comprehensive patient care. Engages in medical partnerships and sustainable practices. |
4,612 | |||
| 5 |
Université de Rennes Iuniv-rennes.fr
Multidisciplinary university focusing on dynamic research, lifelong learning, societal challenges, and regional socio-economic and cultural development through partnerships. |
4,002 | |||
| 6 |
CHU de Renneschu-rennes.fr
Large French public hospital offering extensive medical, surgical, and obstetrical services, advanced diagnostics, research, and medical training to the population. |
3,470 | |||
| 7 |
Banque Populaire Grand Ouestbanquepopulaire.fr
Cooperative regional bank supporting entrepreneurs, artisans, and businesses across seven departments, fostering economic development through financial and human expertise. |
2,642 | |||
| 8 |
Ouest-Franceouest-france.fr
Publishing extensive regional news across Brittany, Normandy, and Pays de la Loire with multiple print editions and digital platforms. |
2,507 | |||
| 9 |
Université Rennes 2univ-rennes2.fr
Higher education and research focused on arts, humanities, social sciences, languages, communication, psychology, education, sociology, geography, history, and sports. |
2,286 | |||
| 10 |
C-Log - L'Expertise Supply Chainclog.fr
Provides tailored supply chain solutions for fashion brands, including retail, e-commerce, international transport, customs, and continuous improvement consulting services. |
2,276 | |||
| 11 |
Legendregroupe-legendre.com
A family-owned company with over 2300 employees and €850 million in revenue, focusing on construction, real estate, and energy sectors nationally and internationally |
1,951 | |||
| 12 |
Groupe Beaumanoirgroupe-beaumanoir.com
A leading pioneer in women's ready-to-wear products, operating four successful brands worldwide with a strong focus on sales and logistics services |
1,870 | |||
| 13 |
Rennes Ville et Métropolerennes.fr
Fosters economic, urban development, attracting talent and students. Provides diverse public services through 5300 agents, focusing on quality of life and professional growth. |
1,828 | |||
| 14 |
Del Artedelarte.fr
operates a chain of Italian restaurants across France, offering dine-in, takeaway, and delivery with authentic, quality Italian dishes for all budgets. |
1,824 | |||
| 15 |
Solinasolina.com
Designing customized food solutions with enhanced taste, nutrition, and functionality for food industry, service, butchery, and nutrition sectors worldwide. |
1,537 | |||
| 16 |
Région Bretagnebretagne.bzh
Elected assembly managing Brittany's daily life and future through education, transport, economic development, planning, culture, sports, and environment. |
1,529 | |||
| 17 |
Brioche Doréebriochedoree.fr
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. |
1,477 | |||
| 18 |
EHESP - École des hautes études en santé publiqueehesp.fr
A public institution offering a wide range of training programs in public health, with a strong focus on research and international partnerships |
1,474 | |||
| 19 |
Crédit Agricole d'Ille-et-Vilainecredit-agricole.fr
Provides banking and financial services to over 530,000 clients with 119 branches and 1,500 employees in Ille-et-Vilaine. |
1,332 | |||
| 20 |
L'Orange bleuelorangebleue-group.com
Leading European fitness company operating over 400 clubs offering cardio, strength training, wellness programs, personalized coaching, and innovative group classes. |
1,083 | |||
| 21 |
Interaction Interiminteraction-interim.com
National network providing temporary work, recruitment for fixed-term and permanent contracts, training, support, and consulting services across all business sectors. |
1,055 | |||
| 22 |
SOCIETE DES TRANSPORTS GAUTIERstg-logistique.fr
Transports food products, offering comprehensive, personalized services, focusing on proximity, reactivity, and food safety, with just-in-time deliveries across Europe. |
1,039 | |||
| 23 |
Département d'Ille-et-Vilaineille-et-vilaine.fr
Management of social services, education, infrastructure, environment, and culture with a focus on solidarity and regional development. |
994 | |||
| 24 |
Rennes School of Businessrennes-sb.com
International business school focusing on educating responsible entrepreneurs through English programs, international partnerships, research, innovation, executive training, and hands-on experience |
937 | |||
| 25 |
Adapei 35adapei35.com
A medico-social association supporting over 2850 individuals with disabilities through 64 facilities in Ille-et-Vilaine, with a workforce of 1600 professionals |
824 | |||
| 26 |
Académie de Rennesac-rennes.fr
Official regional education authority managing national education services and policies across the Brittany region including four departments. |
809 | |||
| 27 |
Helloworkhellowork.com
digital platforms for employment, recruitment, training, and HR solutions, connecting candidates with jobs and training, supporting businesses and educational institutions. |
807 | |||
| 28 |
Kersia, inventing a food safe worldkersia-group.com
Global biosecurity and food safety, preventing disease and contamination in animals and humans across the food supply chain, including healthcare. |
797 | |||
| 29 |
Groupe Convivioconvivio.fr
Family-owned catering group specializing in collective food services, leading in western France with strong client adaptation and responsive teams. |
790 | |||
| 30 |
CLPS L'enjeu compétencesclps.net
Provides professional training, career support, and consulting services to employees and job seekers across western France, focusing on local needs. |
757 | |||
| 31 |
INNOVALinnoval.com
Cooperative providing personalized advisory, health, reproduction, and genetics services to livestock farmers for improved performance and sustainability. |
732 | |||
| 32 |
ADDITIouest-france.fr
Local advertising and media company focusing on digital innovation, client orientation, and professional development within a strong regional group. |
729 | |||
| 33 | 700 | ||||
| 34 |
ABER Propretéaberproprete.fr
Providing high-quality industrial cleaning and hygiene services with continuous employee training and precise service monitoring since 1975. |
682 | |||
| 35 |
CENTRE HOSPITALIER GUILLAUME REGNIERch-guillaumeregnier.fr
Provides prevention, diagnosis, treatment, rehabilitation, social reintegration, research, and education in adult and child psychiatry sectors. |
679 | |||
| 36 |
Solanogroupe-solano.fr
Since 2007, this company specializes in recruiting temporary and permanent staff for the transportation and logistics industry |
614 | |||
| 37 |
Askoriaaskoria.eu
The company provides training and guidance to social intervention professionals, aiming to create a more just, supportive, and sustainable society |
581 | |||
| 38 |
Cerfrance Brocéliandecerfrance-broceliande.fr
Provides specialized accounting services and strategic business advice to company managers and organizations located throughout the Ille-et-Vilaine and Morbihan regions of France. |
572 | |||
| 39 |
TIMAC AGRO Francetimacagro.fr
Inspired by nature, improves natural resources, plant and animal nutrition for efficient, sustainable agriculture, enhancing agricultural performance. |
557 | |||
| 40 | 547 | ||||
| 41 |
Arkéa Banque Entreprises et Institutionnelsarkea-banque-ei.com
Specializes in providing tailored financial solutions, credit, and advisory services to businesses and institutional clients across various sectors. |
546 | |||
| 42 |
Stade Rennais F.C.staderennais.com
Professional football club offering corporate services including ticketing, hospitality, event organization, conferences, salons, and team building activities. |
545 | |||
| 43 |
PANPHARMApanpharma.eu
Develops, produces, and commercializes generic injectable medicines for hospitals and clinics in France and over 75 countries, specializing in antibiotics, anesthetics, and analgesics. |
534 | |||
| 44 |
Groupe PIGEONgroupe-pigeon.com
Independent family group involved in territorial development in the western region, focusing on urban planning and infrastructure projects |
526 | |||
| 45 |
NET PLUSnet-plus.fr
A company specializing in cleaning services, prioritizing customer satisfaction, quality interventions, and social responsibility with a focus on employee well-being and respect |
521 | |||
| 46 |
DIANAsymrise.com
A global supplier of fragrances, flavors, food, nutrition, and cosmetic ingredients, acquired by Symrise Group For updates, follow Symrise AG page |
517 | |||
| 47 |
Groupe Valeorgroupevaleor.com
Development and operation of specialized stores focused on enhancing living spaces with inspiration, pleasure, and environmental respect, employing over 600 people. |
511 | |||
| 48 |
SOCIETE VITREENNE D'ABATTAGE JEAN ROZErecrutement.agromousquetaires.com
Leading French distributor brand manufacturer, Agromousquetaires, with 70 sites specializes in beef and sheep meat processing, promoting "Better Production for Better Living" |
511 | |||
| 49 |
Sanders Nutrition animalesanders.fr
French leader in animal nutrition providing tailored solutions to livestock production sectors with a focus on value, sustainability, and local support |
504 | |||
| 50 |
Le Roy Logistiqueleroylogistique.com
Provider of tailored national and international transport and logistics solutions with 70 years of experience and strong customer relationships. |
502 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 51 |
Groupe Lostegroupe-loste.fr
French family-owned network manufacturing and distributing premium deli products, catering specialties, and charcuterie to food professionals, butchers, bakers, and local retailers. |
500 | |||
| 52 |
SIB [numérique, santé et secteur public]sib.fr
Innovative cooperative in digital health and public sector, serving 620+ institutions in modernizing their IT systems with a wide range of services and expertise |
499 | |||
| 53 | 487 | ||||
| 54 |
INSA Rennesinsa-rennes.nous-recrutons.fr
Provides five-year post-baccalaureate engineering education with strong research in information technologies and materials science in Brittany, France. |
483 | |||
| 55 |
RBIrbi-informatique.fr
Specializing in information systems design, implementation, and integration, RBI-Informatique offers services in infrastructure, collaboration, and management solutions for businesses |
468 | |||
| 56 |
EMOemo-france.com
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 |
463 | |||
| 57 |
Lycée Jeanne d'Arc - Rennesessfa.fr
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 |
463 | |||
| 58 |
Office Notarial Anastasia Moreaumoreau-fougeres.notaires.fr
Located in the heart of Fougères, this company offers legal services in real estate, family, and corporate law, focusing on accessibility, listening, and modernity |
447 | |||
| 59 |
Blot Immobilierblot-immobilier.fr
Providing personalized real estate services including buying, selling, renting, financing, legal advice, and professional support with local expertise and client focus. |
439 | |||
| 60 |
Chambre d'agriculture de Bretagnebretagne.chambres-agriculture.fr
Representing farmers, providing expertise to public services and local authorities, supporting farmers in business development and professional adaptation. |
439 | |||
| 61 |
Ville de Saint-Malosaint-malo.fr
Historic coastal city offering rich cultural events, maritime activities, diverse tourism facilities, and serving as a key transport and sports hub. |
438 | |||
| 62 |
Groupe ANGEVINgroupe-angevin.fr
A family-owned construction group specializing in structural work, founded in 1936 Consists of seven distinct companies with a total revenue of €215 million |
433 | |||
| 63 |
Carsat Bretagnecarsat-bretagne.fr
French social security body, retirement benefits, occupational risk prevention, support for vulnerable individuals, senior citizens' assistance. Regional economic player. |
418 | |||
| 64 |
M-extendm-extend.com
Family-run group since 1951, specializing in agricultural handling solutions Integrated design to production process, emphasis on innovation, sustainability, and international growth |
415 | |||
| 65 |
EMEecole-eme.com
Dedicated to developing industrial environmental engineering skills through training, academic and applied research, and knowledge dissemination via conferences and student publications. |
414 | |||
| 66 |
Cache Cachecache-cache.fr
French ready-to-wear brand offering trendy, colorful, and affordable fashion for joyful and optimistic women, part of a leading retail group. |
408 | |||
| 67 |
Faculté des Métiersfac-metiers.fr
Offers vocational apprenticeship training across 12 sectors, certifying 64 professions with 108 diplomas for over 3,600 young individuals and 3,000 adults annually. |
395 | |||
| 68 |
SDIS 35 -Service départemental d'incendie et de secours d'Ille-et-Vilainesapeurs-pompiers35.fr
The company is a public department in charge of emergency rescue missions, risk analysis, emergency response coordination, prevention, and firefighting |
394 | |||
| 69 |
Espacilespacil.com
Support local authorities with urban renewal, population diversity, economic development, and manage 26,000 rental homes in France regions. |
375 | |||
| 70 |
Keolis Rennes Métropolekeolis-rennes-metropole.com
Manages and operates various urban transport networks in Rennes, including buses and metros, with a focus on daily passenger services. |
368 | |||
| 71 |
CCPA GROUPccpa.com
Develops, manufactures, and distributes animal nutrition and health products including premixes and feed additives, offering zootechnical support to feed manufacturers globally. |
367 | |||
| 72 |
CATALYS Conseilcatalys-conseil.fr
CATALYS Conseil is a consulting firm specializing in HR strategy and management, offering services in career development, organizational transformation, and employment training policies |
366 | |||
| 73 |
Groupe actupublihebdos.actu.fr
Publishing regional weekly newspapers and operating a powerful multi-local news platform, providing local information and communication across France. |
358 | |||
| 74 |
Fondation AUB Santéaub-sante.fr
Nonprofit healthcare organization specializing in chronic kidney disease treatment, home care services, and professional training in dialysis and patient support. |
353 | |||
| 75 |
Additi Média | Groupe Ouest-Franceadditimedia.ouest-france.fr
Marketing expertise for local media and markets in Grand Ouest, offering tailored press and digital communication strategies and advertising solutions. |
352 | |||
| 76 |
Guillemot Corporationguillemot.com
Design and manufacture interactive entertainment hardware and accessories under Hercules and Thrustmaster brands, distributing products worldwide with focus on growth markets. |
349 | |||
| 77 |
Traiteur de Paristraiteurdeparis.com
Production of high-quality French delicacies, desserts, and culinary aids using traditional methods and freezing for global export. |
336 | |||
| 78 | 324 | ||||
| 79 |
Aäsgardaasgard.fr
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 |
323 | |||
| 80 |
SQUARE HABITAT BRETAGNEsquarehabitat.fr
Trusted real estate agency network offering personalized services and innovative solutions for buying, selling, renting, and investing in properties |
317 | |||
| 81 |
Groupe Lamottelamotte.fr
Company specializes in real estate, covering construction, management, operation, and rental investment across various property segments with integrated team expertise. |
317 | |||
| 82 |
Groupe Hospitalier Rance-Emeraudegh-re.fr
Healthcare network including hospitals in Saint-Malo, Dinan, and Cancale, providing emergency, surgery, medicine, obstetrics, and elderly care services. |
316 | |||
| 83 |
BDSbds-restaurant.com
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 |
316 | |||
| 84 |
TIMAC AGRO Internationaltimacagro.com
Provides precise, innovative, complete nutritional solutions for soils, plants, and animals, supporting farmers globally for over 65 years. |
314 | |||
| 85 |
Bonobobonoboplanet.com
Offering authentic and affordable jeans for an optimistic and engaged generation, promoting values of respect and harmony through a new denim spirit |
313 | |||
| 86 |
Geirecgeirec.com
An independent regional cabinet with a national focus, GEIREC supports businesses with expertise and values, offering daily partnership, confidentiality, competence, and responsiveness |
308 | |||
| 87 |
Groupe GIBOIREgiboire.com
Family-owned real estate group specializing in property development, land planning, hospitality, sales, rental management, commercial real estate, and investment advisory. |
302 | |||
| 88 |
Aiguillon constructionaiguillon-construction.fr
Design, manage, and sell affordable housing for low-income individuals, focusing on quality service, territorial balance, and environmental responsibility. |
296 | |||
| 89 |
Groupe MARCmarc-sa.fr
Public works, building construction, civil engineering, quarry operation, scaffolding, environmental services, and metallic construction across the Grand Ouest region. |
291 | |||
| 90 |
DELIVERdeliver.events
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 |
280 | |||
| 91 |
Institut d'études politiques de Rennessciencespo-rennes.fr
An institution of higher education providing multidisciplinary training to students for roles in public, private, and non-profit sectors, nationally and internationally |
277 | |||
| 92 |
SPCservicepro-bretagne.com
This company specializes in industrial automation and robotics, supporting integrators and manufacturers in their projects with expert guidance. |
277 | |||
| 93 |
Saviel France - AGROMOUSQUETAIRESrecrutement.agromousquetaires.com
Agromousquetaires is the manufacturing division of Les Mousquetaires Group, producing private label meat products in France with a focus on quality and sustainability |
275 | |||
| 94 |
Hoppenhoppen.care
Hoppen - Time to Care provides innovative, customizable digital solutions for healthcare facilities, improving patient experience, staff efficiency, and overall performance |
274 | |||
| 95 |
Broadpeakbroadpeak.tv
Broadpeak specializes in designing and manufacturing video delivery components for IPTV, Cable, and OTT services, enhancing quality of experience for subscribers worldwide |
269 | |||
| 96 |
Regional Interim - R Interim Groupe Triangle Solutions RHtriangle.fr
Family-run recruitment agency providing personalized interim staffing solutions, rapid client response, and extensive support for temporary workers and companies. |
268 | |||
| 97 |
PHOSPHEAphosphea.com
Specializing in phosphorus and calcium solutions for animal nutrition, this company is a global player with a production capacity exceeding 1 Mt |
268 | |||
| 98 |
Clinique Mutualiste La Sagesseclinique-rennes.fr
A healthcare facility with 220 beds and over 550 professionals offering specialized care in mother-child, cancer surgeries, medical specialties, and chronic pain management |
268 | |||
| 99 | 266 | ||||
| 100 |
OETgroupe-ovalt.com
Independent service company specializing in MES, automation, robotics, electrical systems, and weighing with turnkey solutions and maintenance across multiple sites. |
266 | |||
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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.
More company lists in the Ille-et-Vilaine department
- Companies with in-house R&D in the Ille-et-Vilaine department 152
- Retail chains in the Ille-et-Vilaine department 135
- Multinational companies in the Ille-et-Vilaine department 118
- Manufacturers in the Ille-et-Vilaine department 100
- Professional services firms in the Ille-et-Vilaine department 94
- SaaS companies in the Ille-et-Vilaine department 85
- Family-owned companies in the Ille-et-Vilaine department 81
- Software Development companies in the Ille-et-Vilaine department 80
- Public sector organisations in the Ille-et-Vilaine department 75
- IT Services and IT Consulting companies in the Ille-et-Vilaine department 67
- IT services companies in the Ille-et-Vilaine department 65
- Hardware manufacturers in the Ille-et-Vilaine department 61
- Education providers in the Ille-et-Vilaine department 60
- Distributors and wholesalers in the Ille-et-Vilaine department 58
- Consulting firms in the Ille-et-Vilaine department 54
- Food and Beverage Manufacturing companies in the Ille-et-Vilaine department 46
- Retail companies in the Ille-et-Vilaine department 46
- Critical infrastructure operators in the Ille-et-Vilaine department 45
- Financial services firms in the Ille-et-Vilaine department 45
- Subscription businesses in the Ille-et-Vilaine department 45
- Construction companies in the Ille-et-Vilaine department 43
- Law Practice companies in the Ille-et-Vilaine department 43
- Higher Education companies in the Ille-et-Vilaine department 41
- Legal Services companies in the Ille-et-Vilaine department 41
The same list elsewhere in France
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