# The 100 largest companies in the Charente-Maritime department

Tamtam tracks 444 companies headquartered in the Charente-Maritime department. This list ranks the 100 largest by number of employees on LinkedIn, led by STELIA Aerospace, La Rochelle Université and Excelia. Their median headcount is 114. Half of them were founded in 1990 or later. The most common headquarters are La Rochelle (38), Périgny (13) and Saintes (12).

The companies in Charente-Maritime are a mix of large public and private sector employers. Highlights include STELIA Aerospace in Rochefort, which designs and manufactures premium aircraft cabin interiors, and La Rochelle Université, a higher education institution with strong business partnerships. Other notable entities are CGR Cinémas, operating 73 cinemas across France, and Fountaine Pajot, known for designing and constructing sailing catamarans and motor yachts.

The list reveals a strong presence of public services and large regional organizations, such as the Département de la Charente-Maritime and Groupe Hospitalier Littoral Atlantique. Headquarters are distributed across several towns, with La Rochelle being a prominent hub alongside Rochefort, Saintes, and Périgny, indicating a decentralized economic landscape within the department.

🇫🇷 Charente-Maritime · 100 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [STELIA Aerospace](https://www.tamtam.ai/c/stelia-aerospace) (stelia-aerospace.com)<br>Design and manufacture of premium aircraft cabin interiors, specializing in high-quality passenger seats with a distinctive French design touch. | Aviation and Aerospace Component Manufacturing | 🇫🇷 Rochefort | 1,881 | 2015 |
| 2 | [La Rochelle Université](https://www.tamtam.ai/c/la-rochelle-universite) (univ-larochelle.fr)<br>Higher education institution offering personalized learning, active research involvement, and strong partnerships with businesses for innovation and development. | Higher Education | 🇫🇷 La Rochelle | 1,213 | 1993 |
| 3 | [Excelia](https://www.tamtam.ai/c/excelia) (excelia-group.com)<br>Leading higher education group with five schools: business, tourism, digital, academy, and executive education programs. | Higher Education | 🇫🇷 La Rochelle | 1,122 | 1988 |
| 4 | [Crédit Agricole Charente-Maritime Deux-Sèvres](https://www.tamtam.ai/c/credit-agricole-charente-maritime-deux-sevres) (credit-agricole.fr)<br>Regional mutual bank with 159 branches and 1810 employees, focusing on local customer needs, recruitment, and community values. | Banking | 🇫🇷 Lagord | 1,093 |  |
| 5 | [CGR Cinémas](https://www.tamtam.ai/c/cgr-cinemas) (cgrcinemas.fr)<br>Operates 73 cinemas across France, offers premium ICE Theater experiences, and focuses on expanding family-friendly, popular movie venues. | Entertainment Providers | 🇫🇷 Périgny | 658 | 1974 |
| 6 | [Département de la Charente-Maritime](https://www.tamtam.ai/c/departement-de-la-charente-maritime) (la.charente-maritime.fr)<br>Employs over 2500 agents in diverse roles including medical, social work, engineering, administration, and management to serve public needs. | Government Administration | 🇫🇷 La Rochelle | 576 |  |
| 7 | [Coop Atlantique](https://www.tamtam.ai/c/coop-atlantique) (coop-atlantique.fr)<br>A consumer cooperative managing various retail stores in the Center-West of France, offering a range of supermarkets, hypermarkets, and restaurants | Retail | 🇫🇷 Saintes | 503 | 1881 |
| 8 | [Groupe Hospitalier Littoral Atlantique](https://www.tamtam.ai/c/groupe-hospitalier-littoral-atlantique) (ch-larochelle.fr)<br>The Groupe Hospitalier Littoral-Atlantique is a multi-site hospital group with various specialties, providing a wide range of healthcare services | Hospitals and Health Care | 🇫🇷 La Rochelle | 452 |  |
| 9 | [MAPA - Mutuelle d'Assurance](https://www.tamtam.ai/c/mapa-mutuelle-d-assurance) (mapa-assurances.fr)<br>Providing specialized insurance and financial services for food industry professionals, covering business risks, personal health, property protection, and commercial vehicle coverage through local agencies. | Insurance | 🇫🇷 Saint-Jean-d'Angély | 446 | 1911 |
| 10 | [LPO France](https://www.tamtam.ai/c/lpo-france) (lpo.fr)<br>Acting for nature and biodiversity through knowledge, expertise, research, protection, conservation, defense, management, reclamation, education, and valorization. | Civic and Social Organizations | 🇫🇷 Rochefort | 421 | 1912 |
| 11 | [SDIS 17](https://www.tamtam.ai/c/sdis-17) (sdis17.fr)<br>Official page of the Fire and Rescue Department in Charente-Maritime, providing emergency response and fire safety services to the community | Public Safety | 🇫🇷 Périgny | 377 |  |
| 12 | [ADEI 17](https://www.tamtam.ai/c/adei-17) (adei17.com)<br>Providing personalized support and services for individuals with intellectual, psychiatric disabilities, as well as children and vulnerable adults, through a comprehensive and individualized approach | Individual and Family Services | 🇫🇷 Aytré | 360 | 1964 |
| 13 | [Fountaine Pajot](https://www.tamtam.ai/c/fountaine-pajot) (fountaine-pajot.com)<br>Design and construction of high-performance, seaworthy, innovative, and comfortable sailing catamarans and motor yachts for enthusiasts. | Shipbuilding | 🇫🇷 Aigrefeuille-d'Aunis | 355 | 1976 |
| 14 | [Stade Rochelais](https://www.tamtam.ai/c/stade-rochelais) (staderochelais.com)<br>Sports club focusing on rugby and basketball, emphasizing progress, engagement, solidarity, and respect as core values. | Spectator Sports | 🇫🇷 La Rochelle | 317 | 1898 |
| 15 | [Groupe Hospitalier Saintes - Saint-Jean-d'Angély](https://www.tamtam.ai/c/groupe-hospitalier-saintes-saint-jean-d-angely) (gh-saintesangely.fr)<br>A healthcare group in Nouvelle-Aquitaine, France with 1300 beds and 3000 employees, located in the heart of Charente-Maritime | Hospitals and Health Care | 🇫🇷 Saintes | 311 |  |
| 16 | [La Rochelle Agglo](https://www.tamtam.ai/c/la-rochelle-agglo) (agglo-larochelle.fr)<br>Provides a dynamic ecosystem focused on ecological transitions, supporting sustainable and innovative business creation for economic growth. | Government Administration | 🇫🇷 La Rochelle | 304 | 1964 |
| 17 | [CGO Expertise comptable & Conseil](https://www.tamtam.ai/c/cgo-expertise-comptable-and-conseil) (groupecgo.fr)<br>Providing accounting, business consulting, tax, social, payroll, legal, wealth management, and agro-environmental services for entrepreneurs across the southwestern region for over forty years. | Accounting | 🇫🇷 Fontcouverte | 256 | 1987 |
| 18 | [Dufour](https://www.tamtam.ai/c/dufour) (dufour-yachts.com)<br>Design and manufacture of exclusive sailing yachts with customer-focused approach, offering a range of models for yachting enthusiasts worldwide. | Shipbuilding | 🇫🇷 Périgny | 246 | 1964 |
| 19 | [Association l'Escale](https://www.tamtam.ai/c/association-l-escale) (association-escale.fr)<br>providing shelter, assistance, and social integration support to vulnerable individuals across multiple regions with specialized service sectors | Civic and Social Organizations | 🇫🇷 Aytré | 243 | 1951 |
| 20 | [NEWLOC](https://www.tamtam.ai/c/newloc) (newloc.fr)<br>A regional equipment rental company with over 14,000 diverse machines serving various industries, expanding services to include specialized equipment for landscaping, demolition, and events | Equipment Rental Services | 🇫🇷 Périgny | 242 | 2002 |
| 21 | [Clinique Pasteur Royan - Vivalto Santé](https://www.tamtam.ai/c/clinique-pasteur-royan-vivalto-sante) (cliniquepasteur-royan.vivalto-sante.com)<br>Multispecialty surgical facility with advanced technology, emergency services, imaging, and continuous specialist care for inpatient and outpatient treatments. | Hospitals and Health Care | 🇫🇷 Royan | 231 | 1953 |
| 22 | [LIBAUD](https://www.tamtam.ai/c/libaud) (libaud-prefa.fr)<br>Specializing in precast concrete and materials trading for public works, distributing products across western France with multiple factories and agencies | Wholesale Building Materials | 🇫🇷 La Rochelle | 229 | 1945 |
| 23 | [RESE](https://www.tamtam.ai/c/rese) (rese.fr)<br>The company produces drinking water, provides water distribution and sewage services to over 300,000 users for municipalities choosing public operation | Manufacturing | 🇫🇷 Saintes | 225 | 1954 |
| 24 | [Exco Valliance](https://www.tamtam.ai/c/exco-valliance) (exco.fr)<br>Accounting, auditing, and consulting services supporting entrepreneurial initiatives, business development, and management optimization across France, Poland, and Portugal through an international independent network. | Accounting | 🇫🇷 Périgny | 221 | 2002 |
| 25 | [Mission Locale La Rochelle Ré Pays d'Aunis](https://www.tamtam.ai/c/mission-locale-la-rochelle-re-pays-d-aunis) (missionlocale.com)<br>The Mission Locale La Rochelle Ré Pays d'Aunis supports young people aged 16-25 in social and professional integration through public service | Civic and Social Organizations | 🇫🇷 La Rochelle | 215 | 1982 |
| 26 | [MS CONSTRUCTION](https://www.tamtam.ai/c/ms-construction)<br>Construction company providing project management, real estate development, and construction services in 4 countries since 2012, focused on budget, technology, innovation, and management Contact us for more details | Construction | 🇫🇷 Royan | 201 | 2012 |
| 27 | [Groupe Michel](https://www.tamtam.ai/c/groupe-michel) (groupemichel.com)<br>A leading French automotive group offering Renault, Dacia, and Alpine vehicles, along with repair and maintenance services, operating across multiple departments | Retail | 🇫🇷 La Rochelle | 195 | 1992 |
| 28 | [TOUCAS-TERZIAN](https://www.tamtam.ai/c/toucas-terzian) (patricktoucasterzian.com)<br>Memory tracker: Helping individuals remember and recall their memories efficiently (19 words) | Artists and Writers | 🇫🇷 La Rochelle | 195 | 2015 |
| 29 | [INNOV'IA](https://www.tamtam.ai/c/innov-ia) (innov-ia.com)<br>Manufacturing various powdered forms of functional ingredients, offering custom solutions in low-temperature spray drying, granulation, micro-encapsulation, prilling, and coating for preservation and property optimization. | Food and Beverage Manufacturing | 🇫🇷 La Rochelle | 192 | 1990 |
| 30 | [Zolux](https://www.tamtam.ai/c/zolux) (zolux.com)<br>A family group based in France, ZOLUX operates in the pet market with over 90 years of experience, offering essential products for all pet families globally | Manufacturing | 🇫🇷 Saintes | 192 | 1933 |
| 31 | [Terra Lacta](https://www.tamtam.ai/c/terra-lacta) (terralacta.com)<br>Leading dairy cooperative in Nouvelle-Aquitaine, collecting and valorizing high-quality French cow and goat milk from numerous producers. | Food and Beverage Manufacturing | 🇫🇷 Surgères | 176 | 1936 |
| 32 | [EMPLOI EVENEMENTIEL](https://www.tamtam.ai/c/emploi-evenementiel) (emploi-evenementiel.fr)<br>Specialized job platform for communication and event production roles including exhibitions, conferences, corporate and public events, sports, and cultural activities. | Staffing and Recruiting | 🇫🇷 La Rochelle | 175 | 2010 |
| 33 | [Sellsy](https://www.tamtam.ai/c/sellsy) (sellsy.com)<br>Provides a comprehensive CRM, invoicing, and pre-accounting software suite for optimized business management and enhanced customer experience, supporting marketing, sales, and administrative teams. | Software Development | 🇫🇷 La Rochelle | 172 | 2009 |
| 34 | [SEMAT - Groupe Zoeller](https://www.tamtam.ai/c/semat-groupe-zoeller) (semat.com)<br>French manufacturer of collection and cleaning solutions since 1945. Provides robust equipment for public authorities and private operators, committed to ecological transition. | Motor Vehicle Manufacturing | 🇫🇷 La Rochelle | 167 | 1945 |
| 35 | [La Grande Terrasse Hôtels et Spas](https://www.tamtam.ai/c/la-grande-terrasse-hotels-et-spas) (la-grande-terrasse.com)<br>Luxury hotel complex offering spa treatments, fine dining by renowned chefs, thalassotherapy, and comfortable accommodations near La Rochelle. | Hospitality | 🇫🇷 Châtelaillon-Plage | 156 |  |
| 36 | [Groupe Hautier](https://www.tamtam.ai/c/groupe-hautier) (transports-hautier.fr)<br>Family-owned company providing innovative, sustainable logistics and transportation solutions with strong regional presence and commitment to employee development and environmental responsibility. | Truck Transportation | 🇫🇷 La Rochelle | 152 | 1914 |
| 37 | [STECO Expert Comptable](https://www.tamtam.ai/c/steco-expert-comptable) (steco.fr)<br>Accounting firm with over 65 years of experience advising more than 5000 clients including individuals, artisans, merchants, professionals, and SMEs. | Accounting | 🇫🇷 Lagord | 149 | 1958 |
| 38 | [FIMECO Walter France](https://www.tamtam.ai/c/fimeco-walter-france) (fimeco-walter-allinial.com)<br>A multidisciplinary group providing business services including accounting, auditing, consulting, social, legal, financial management, and training for entrepreneurs and businesses | Accounting | 🇫🇷 Saintes | 147 | 1965 |
| 39 | [AMEL Yachts](https://www.tamtam.ai/c/amel-yachts) (amel.fr)<br>Design and build handcrafted offshore sailing yachts combining craftsmanship, technical innovation, and a passion for safe, elegant, sustainable voyages. | Shipbuilding | 🇫🇷 Périgny | 145 | 1964 |
| 40 | [Enim - Le régime social des marins](https://www.tamtam.ai/c/enim-le-regime-social-des-marins) (enim.eu)<br>An administrative public institution overseeing the social security regime for maritime workers, managing risks and providing healthcare and social services for mariners and employers | Government Administration | 🇫🇷 Périgny | 145 |  |
| 41 | [CENTRE HOSPITALIER DE SAINTONGE SAINTES](https://www.tamtam.ai/c/centre-hospitalier-de-saintonge-saintes)<br>A medical practice company located in Saintes, France, providing healthcare services at 11 Boulevard Ambroise Paré in Nouvelleaquitaine | Medical Practice | 🇫🇷 Saintes | 141 |  |
| 42 | [IUT La Rochelle](https://www.tamtam.ai/c/iut-la-rochelle) (iut-larochelle.fr)<br>Educating students through professional three-year programs (BUT) across various fields like marketing, civil engineering, networks, biology, and computer science. | Higher Education | 🇫🇷 La Rochelle | 139 | 1968 |
| 43 | [Unapei 17](https://www.tamtam.ai/c/unapei-17) (unapei17.org)<br>Provides inclusive support and services for disabled individuals, promoting rights, social inclusion, and tailored assistance across life stages. | Civic and Social Organizations | 🇫🇷 Périgny | 127 | 1961 |
| 44 | [Elixir Aircraft](https://www.tamtam.ai/c/elixir-aircraft) (elixir-aircraft.com)<br>Designs and produces the best certified 2-seater light aircraft for training, travel, and leisure purposes, shaping the future of general aviation. | Aviation and Aerospace Component Manufacturing | 🇫🇷 La Rochelle | 125 | 2015 |
| 45 | [CLINIQUE DE L'ATLANTIQUE](https://www.tamtam.ai/c/clinique-de-l-atlantique) (clinique-atlantique-puilboreau.ramsaysante.fr)<br>Hospital & health care company located in Puilboreau, France, offering a range of medical services to patients | Hospitals and Health Care | 🇫🇷 Puilboreau | 119 | 1999 |
| 46 | [Sarrion Global Solutions](https://www.tamtam.ai/c/sarrion-global-solutions) (sarrion-transports.fr)<br>Founded in 1947 as a family-owned business, the Group Sarrion employs 850 professionals across 22 agencies and subsidiaries throughout France Their focus is on serving clients | Truck Transportation | 🇫🇷 La Rochelle | 118 | 1947 |
| 47 | [Groupe Aboutir Emploi](https://www.tamtam.ai/c/groupe-aboutir-emploi) (aboutiremploi.fr)<br>A group with 28 agencies dedicated to recruitment, offering staffing solutions, legal assistance, training, and partnership with sports events Employment at the core! | Human Resources Services | 🇫🇷 La Rochelle | 118 | 2005 |
| 48 | [Communauté d'Agglomération de Saintes](https://www.tamtam.ai/c/communaute-d-agglomeration-de-saintes) (agglo-saintes.fr)<br>A government administration company located in Saintes, France, serving the community and managing regional development projects in Nouvelle-Aquitaine | Government Administration | 🇫🇷 Saintes | 117 |  |
| 49 | [CMA Charente-Maritime - Nouvelle-Aquitaine](https://www.tamtam.ai/c/cma-charente-maritime-nouvelle-aquitaine) (cma-nouvelleaquitaine.fr)<br>Supports artisans at every stage of their professional life, from apprenticeship and business creation to training and development, promoting crafts and businesses in its territory. | Government Administration | 🇫🇷 La Rochelle | 114 | 1978 |
| 50 | [AMANTA](https://www.tamtam.ai/c/amanta) (amanta-resorts.com)<br>Amanta Group operates 5 hotels and a receptive travel agency across Madagascar, Mayotte, La Réunion, and La Rochelle, with a focus on sustainability and responsible tourism | Hospitality | 🇫🇷 La Rochelle | 114 | 2016 |
| 51 | [CREOCEAN](https://www.tamtam.ai/c/creocean) (creocean.fr)<br>Offers expertise in marine environment, coastal development, and oceanography, balancing economic growth of maritime territories with ecosystem preservation. | Environmental Services | 🇫🇷 La Rochelle | 113 | 1980 |
| 52 | [Systel-SA](https://www.tamtam.ai/c/systel-sa) (systel-sa.fr)<br>A company specializing in warning processing and transmission network management, with a focus on continuous improvement, innovation, and strong relationships with users | Telecommunications | 🇫🇷 Aytré | 109 | 1985 |
| 53 | [Port Atlantique La Rochelle](https://www.tamtam.ai/c/port-atlantique-la-rochelle) (port.fr)<br>Fifth largest French maritime port, responsible for developing sea transport, managing access infrastructure, and facilitating logistics for goods. Significant player in grain, pulp, and forest product trade. | Maritime Transportation | 🇫🇷 La Rochelle | 109 | 1890 |
| 54 | [Groupe Distri Cash Accessoires](https://www.tamtam.ai/c/groupe-distri-cash-accessoires) (districash.com)<br>A leading wholesaler of tires and spare parts for professionals, offering a wide range of tire brands and services for over 30 years | Wholesale | 🇫🇷 Sainte-Soulle | 109 | 1991 |
| 55 | [Hyper U La Rochelle Beaulieu](https://www.tamtam.ai/c/hyper-u-la-rochelle-beaulieu) (magasins-u.com)<br>A cooperative hypermarket in La Rochelle Beaulieu, part of Coop Atlantique Group, providing local shopping options and services | Retail Groceries | 🇫🇷 Puilboreau | 107 | 1971 |
| 56 | [CCI Charente-Maritime](https://www.tamtam.ai/c/cci-charente-maritime) (cci.fr)<br>Offers tailored support, guidance, and resources to entrepreneurs, small and medium businesses, artisans, and merchants for growth, innovation, and international development. | Government Administration | 🇫🇷 Rochefort | 105 | 2021 |
| 57 | [Rochefort Océan, le territoire](https://www.tamtam.ai/c/rochefort-ocean-le-territoire) (agglo-rochefortocean.fr)<br>Regional community fostering economic development, innovation, job creation, and sustainable growth across 25 municipalities with cultural heritage. | Government Administration | 🇫🇷 Rochefort | 99 | 2014 |
| 58 | [TRADIS](https://www.tamtam.ai/c/tradis) (tradis-design.com)<br>Specialized in creating durable, solvent-free solid wood furniture for retail spaces, offering warm and inviting ambiance through handcrafted finishes and sustainable practices | Manufacturing | 🇫🇷 Pons | 96 | 2011 |
| 59 | [Ville de Saintes](https://www.tamtam.ai/c/ville-de-saintes) (ville-saintes.fr)<br>A city in France with 25,000 residents focused on economic development, environmental sustainability, and offering job opportunities in various fields | Government Administration | 🇫🇷 Saintes | 94 |  |
| 60 | [Communauté d'agglomération Royan Atlantique](https://www.tamtam.ai/c/communaute-d-agglomeration-royan-atlantique) (agglo-royan.fr)<br>Management of water, waste, transport, economic development, urban planning, housing balance, and community social policies across 33 municipalities. | Government Administration | 🇫🇷 Royan | 93 | 2001 |
| 61 | [GROUPE RHINOS](https://www.tamtam.ai/c/groupe-rhinos) (groupe-rhinos.com)<br>Independent marketing agency specializing in custom incentive programs, customer loyalty, business gifts, with travel and audiovisual production services. | Advertising Services | 🇫🇷 La Rochelle | 92 | 1998 |
| 62 | [NOT'ATLANTIQUE](https://www.tamtam.ai/c/not-atlantique) (notatlantique.fr)<br>A major player in the notarial profession in Charente-Maritime, offering expertise in general notarial law, complex real estate, family estate planning, business law, and rural law | Legal Services | 🇫🇷 La Rochelle | 92 |  |
| 63 | [MALICHAUD ATLANTIQUE](https://www.tamtam.ai/c/malichaud-atlantique) (aciturri.com)<br>Leading manufacturer of turbine blades and distributors for aeronautics and energy, specializing in precision machining and mechanical engineering for major industry players. | Aviation and Aerospace Component Manufacturing | 🇫🇷 Rochefort | 92 |  |
| 64 | [Groupe Sica Atlantique](https://www.tamtam.ai/c/groupe-sica-atlantique) (sica-atlantique.com)<br>Major operator on the Atlantic coast providing comprehensive, adapted, and diversified services across all port logistics activities and subsidiaries. | Transportation, Logistics, Supply Chain and Storage | 🇫🇷 La Rochelle | 90 |  |
| 65 | [MSA des Charentes](https://www.tamtam.ai/c/msa-des-charentes) (charentes.msa.fr)<br>The company covers areas of social security for its members such as health, family, retirement, as well as work accidents and occupational diseases They also provide a variety of health and social services and offer Health and Safety services in the workplace | Government Administration | 🇫🇷 Saintes | 90 |  |
| 66 | [Lycée Jean Dautet](https://www.tamtam.ai/c/lycee-jean-dautet) (lyceedautet.fr)<br>A school in La Rochelle offering education to around 1600 students in BTS, DCG, and CPGE programs | Education Administration Programs | 🇫🇷 La Rochelle | 84 | 1959 |
| 67 | [DEAL ECO](https://www.tamtam.ai/c/deal-eco) (deal-eco.fr)<br>Specializes in supplying and installing heat pumps, solar panels, thermodynamic water heaters, and double-flow ventilation systems in Western France. | Construction | 🇫🇷 Aytré | 84 | 2013 |
| 68 | [Shark Robotics](https://www.tamtam.ai/c/shark-robotics) (shark-robotics.com)<br>Designs and manufactures ground robots for hostile environments, protecting first responders and armed forces in critical situations. Deploys robust, mobile systems. | Public Safety | 🇫🇷 La Rochelle | 80 | 2016 |
| 69 | [IVOO](https://www.tamtam.ai/c/ivoo) (ivoo.fr)<br>IVOO specializes in outsourced sales forces, offering competitive sales models, result-oriented culture, and professional standards They provide effective tools and technology for achieving client goals | Telecommunications | 🇫🇷 Rochefort | 75 | 2000 |
| 70 | [Communauté de communes de l'île de Ré](https://www.tamtam.ai/c/communaute-de-communes-de-l-ile-de-re) (cdciledere.fr)<br>Management of urban planning, economic development, environment, housing, culture, sports, social services, tourism, and infrastructure across ten island communes. | Government Administration | 🇫🇷 Saint-Martin-de-Ré | 75 | 1993 |
| 71 | [Antarès Sellier France](https://www.tamtam.ai/c/antares-sellier-france) (antares-sellier.com)<br>Manufacturer and distributor of custom equestrian saddles and riding equipment, focused on tailored solutions for horse and rider. | Spectator Sports | 🇫🇷 Saintes | 74 | 2000 |
| 72 | [Xtrem Santé](https://www.tamtam.ai/c/xtrem-sante) (softwaymedical.fr)<br>A software company developing the OX Mediboard Hospital Information System, used in over 50 healthcare centers for high-quality electronic patient files | Software Development | 🇫🇷 Périgny | 74 | 2023 |
| 73 | [NAUTITECH Catamarans](https://www.tamtam.ai/c/nautitech-catamarans) (nautitechcatamarans.com)<br>French company manufacturing 80 catamarans annually, with 250 employees. Exports 80% globally through 50 resellers. | Shipbuilding | 🇫🇷 Rochefort | 73 | 1992 |
| 74 | [Communauté de Communes Aunis Atlantique](https://www.tamtam.ai/c/communaute-de-communes-aunis-atlantique) (aunisatlantique.fr)<br>Association of 20 municipalities fostering cooperation and solidarity to manage a common development project in a strategic regional area. | Government Administration | 🇫🇷 Ferrières | 73 | 2014 |
| 75 | [Hively Hospitality](https://www.tamtam.ai/c/hively-hospitality) (linktr.ee)<br>A company offering a unique path for professional and personal growth in hospitality, catering, and wellness industries Join the hive! | Hospitality | 🇫🇷 La Rochelle | 72 | 1990 |
| 76 | [GERFI+](https://www.tamtam.ai/c/gerfi) (gerfiplus.fr)<br>Specializing in providing a unique experience, emphasizing differences as a strength | Professional Training and Coaching | 🇫🇷 La Rochelle | 71 | 1981 |
| 77 | [Office Public de l'Habitat de l'agglomération de La Rochelle](https://www.tamtam.ai/c/office-public-de-l-habitat-de-l-agglomeration-de-la-rochelle) (office-agglo-larochelle.fr)<br>The company is a leading social housing provider in La Rochelle offering construction, improvement, management, and support services to residents for quality housing solutions | Real Estate | 🇫🇷 La Rochelle | 70 | 1891 |
| 78 | [CAVOK SARL](https://www.tamtam.ai/c/cavok-sarl)<br>An aircraft maintenance workshop based in Lapalisse, France, specializing in modifying and integrating embedded systems components for all aircraft categories | Aviation and Aerospace Component Manufacturing | 🇫🇷 Périgny | 70 | 1997 |
| 79 | [Mamie & Co](https://www.tamtam.ai/c/mamie-and-co) (mamieandco.com)<br>Development and sale of natural, traditional food, remedies, personal care, and household products inspired by grandmothers' recipes and wisdom. | Retail | 🇫🇷 La Rochelle | 70 | 2012 |
| 80 | [Super U Marans](https://www.tamtam.ai/c/super-u-marans) (magasins-u.com)<br>A customer-centric, responsible retailer promoting sustainable consumption, strong producer relationships, community values, and societal and environmental responsibility Empowering employees for collective efficiency | Retail Groceries | 🇫🇷 Marans | 70 |  |
| 81 | [ATLANTIQUE ALIMENTAIRE](https://www.tamtam.ai/c/atlantique-alimentaire) (atlantiquealimentaire.fr)<br>A food company based in La Rochelle, France, that develops, manufactures, and sells a variety of frozen products including pies, crepes, pizza, and legumes | Food and Beverage Manufacturing | 🇫🇷 La Rochelle | 69 | 1997 |
| 82 | [ID Groupe](https://www.tamtam.ai/c/id-groupe) (idgroupe.fr)<br>The company provides comprehensive services for personal and professional wealth management, including insurance, real estate, retirement planning, and financial investments | Financial Services | 🇫🇷 Lagord | 69 | 2004 |
| 83 | [Yélo - RTCR](https://www.tamtam.ai/c/yelo-rtcr) (rtcr.fr)<br>A public transport company in La Rochelle managing bus lines, bike services, park-and-ride facilities, and marketing for Yélo brand | Urban Transit Services | 🇫🇷 Lagord | 67 |  |
| 84 | [Communauté des Communes de la Haute Saintonge](https://www.tamtam.ai/c/communaute-des-communes-de-la-haute-saintonge) (haute-saintonge.org)<br>A French intermunicipal community in Charente-Maritime, Nouvelle-Aquitaine, promoting economic and tourism development in a territory of 129 municipalities since 1993 | Government Administration | 🇫🇷 Jonzac | 67 | 1993 |
| 85 | [Square Habitat Charente-Maritime Deux-Sèvres](https://www.tamtam.ai/c/square-habitat-charente-maritime-deux-sevres) (squarehabitat.fr)<br>A real estate company offering a wide range of services including buying, selling, renting, investing, property management, and vacation rentals, with a strong emphasis on customer service | Real Estate | 🇫🇷 Lagord | 66 |  |
| 86 | [POCHON SA](https://www.tamtam.ai/c/pochon-sa) (pochon-sa.com)<br>Specializes in marine electronics with 50 years experience, offering over 40,000 equipment units worldwide to professionals and individuals. | Wholesale Appliances, Electrical, and Electronics | 🇫🇷 La Rochelle | 64 | 1971 |
| 87 | [Presta La Rochelle](https://www.tamtam.ai/c/presta-la-rochelle) (presta-service.fr)<br>A company providing maintenance services for retail, automotive, and restaurant chains with a focus on quality, responsiveness, cost control, and customer peace of mind | Business Consulting and Services | 🇫🇷 Périgny | 63 | 2004 |
| 88 | [Valbiotis](https://www.tamtam.ai/c/valbiotis) (valbiotis.com)<br>A research & development company focused on innovation in health nutrition products to prevent metabolic and cardiovascular diseases using plant-based resources | Pharmaceutical Manufacturing | 🇫🇷 Périgny | 63 | 2014 |
| 89 | [GROUPE ALM ALLAIN](https://www.tamtam.ai/c/groupe-alm-allain) (groupe-almallain.com)<br>Specializing in masonry, civil engineering, excavation, demolition, and building design/construction projects, providing a range of services for construction projects | Civil Engineering | 🇫🇷 Saintes | 62 |  |
| 90 | [BtoCall](https://www.tamtam.ai/c/btocall) (btocall.com)<br>Specialist provider of qualified appointment setting and outsourced customer relationship management services designed to fill business agendas and accelerate commercial growth. | Business Consulting and Services | 🇫🇷 Saintes | 62 | 2022 |
| 91 | [Vals de Saintonge Communauté](https://www.tamtam.ai/c/vals-de-saintonge-communaute) (valsdesaintonge.fr)<br>Management and coordination of 109 municipalities within the Saint-Jean d’Angély area, formed by merging seven local communities. | Government Administration | 🇫🇷 Saint-Jean-d'Angély | 62 | 2014 |
| 92 | [Selenium Medical](https://www.tamtam.ai/c/selenium-medical) (selenium-medical.com)<br>Specialized technical consultancy in clean room injection, surface treatment, and sterile packaging for medical devices, focused on innovation and customer satisfaction. | Packaging and Containers Manufacturing | 🇫🇷 La Rochelle | 59 | 2009 |
| 93 | [Lycée Merleau Ponty](https://www.tamtam.ai/c/lycee-merleau-ponty) (lycee-merleauponty.fr)<br>A high school in Rochefort offering general and technological education, as well as post-bac programs in Communication and Computer Systems | Education | 🇫🇷 Rochefort | 59 | 1965 |
| 94 | [BALLANGER](https://www.tamtam.ai/c/ballanger) (ballanger.fr)<br>The company is a dealer of agricultural equipment with over 80 employees, 9 specialized salespeople, 5 locations, specific workshops, used equipment, and trained technicians for top agricultural brands | Wholesale | 🇫🇷 Aigrefeuille-d'Aunis | 58 |  |
| 95 | [UNIMA](https://www.tamtam.ai/c/unima-perigny) (unima.fr)<br>Manages and maintains rivers and marshes, prevents floods, and handles surface hydraulics across over 70% of the Charente-Maritime department. | Environmental Services | 🇫🇷 Périgny | 58 | 1954 |
| 96 | [L'Angélys](https://www.tamtam.ai/c/l-angelys) (langelys.com)<br>Food production company located in La Sauzaie, Fontcouverte, France, specializing in manufacturing and distributing food products. | Food and Beverage Manufacturing | 🇫🇷 Fontcouverte | 57 | 1996 |
| 97 | [Restaurant les Flots](https://www.tamtam.ai/c/restaurant-les-flots) (les-flots.com)<br>A historic restaurant in La Rochelle with a view of the Vieux Port, serving high-quality seafood dishes with finesse and originality | Restaurants | 🇫🇷 La Rochelle | 56 | 1997 |
| 98 | [Imeca](https://www.tamtam.ai/c/imeca) (imeca-reel.com)<br>Design and supply of lifting, handling, and integrated systems for offshore energy production and bulk handling infrastructure projects. | Oil and Gas | 🇫🇷 La Rochelle | 56 | 1946 |
| 99 | [EU-CONEXUS](https://www.tamtam.ai/c/eu-conexus) (eu-conexus.eu)<br>Specialized institution focusing on advancing sustainability in urban coastal areas through research, education, and innovative solutions | Higher Education | 🇫🇷 La Rochelle | 56 |  |
| 100 | [ENERSTEEL](https://www.tamtam.ai/c/enersteel) (enersteel.fr)<br>Specializes in designing and installing large photovoltaic carports, providing sustainable solar energy solutions primarily in France. | Construction | 🇫🇷 Aytré | 56 |  |

## 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 Charente-Maritime department

- [Retail chains in the Charente-Maritime department](https://www.tamtam.ai/l/retail-chains-charente-maritime) (57)
- [Companies with in-house R&D in the Charente-Maritime department](https://www.tamtam.ai/l/r-and-d-companies-charente-maritime) (53)
- [Manufacturers in the Charente-Maritime department](https://www.tamtam.ai/l/manufacturers-charente-maritime) (39)
- [Multinational companies in the Charente-Maritime department](https://www.tamtam.ai/l/multinational-companies-charente-maritime) (36)
- [Public sector organisations in the Charente-Maritime department](https://www.tamtam.ai/l/public-sector-organisations-charente-maritime) (33)
- [Professional services firms in the Charente-Maritime department](https://www.tamtam.ai/l/professional-services-firms-charente-maritime) (26)

## 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-charente-maritime