# The 100 largest companies in the Seine-Saint-Denis department

Tamtam tracks 1,293 companies headquartered in the Seine-Saint-Denis department. This list ranks the 100 largest by number of employees on LinkedIn, led by Veolia, SNCF Réseau and AFPA. Their median headcount is 916. Half of them were founded in 1980 or later. The most common headquarters are Saint-Denis (29), Montreuil (17) and Aubervilliers (10).

The largest companies in Seine-Saint-Denis are primarily significant employers in public services, environmental management, and transportation. These include major national entities and large subsidiaries, alongside a few substantial private sector firms. The list features established organizations, many of which have a long operational history.

Key companies include Veolia, which specializes in environmental services like water, waste, and energy solutions; SNCF Réseau, managing national railway infrastructure; AFPA, a leading professional training organization; and GRDF, which operates Europe's largest gas distribution network. A notable pattern is the concentration of headquarters in cities such as Aubervilliers, Saint-Denis, and Montreuil, indicating these areas as major business hubs within the department.

🇫🇷 Seine-Saint-Denis · 100 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Veolia](https://www.tamtam.ai/c/veolia-aubervilliers) (veolia.com)<br>Works to build environmental security, cleans up pollution, reduces carbon emissions, and regenerates resources through water, waste, and energy solutions. | Environmental Services | 🇫🇷 Aubervilliers | 50,280 | 1853 |
| 2 | [SNCF Réseau](https://www.tamtam.ai/c/sncf-reseau) (sncf-reseau.fr)<br>public entity managing national railway infrastructure, unifying previous services, ensuring clear governance, and coordinating with railway operator SNCF Mobilités. | Rail Transportation | 🇫🇷 Saint-Denis | 23,115 | 2015 |
| 3 | [AFPA](https://www.tamtam.ai/c/afpa) (afpa.fr)<br>Leading adult professional training organization in France, offering a wide range of job-focused courses to help individuals gain employment and assist companies in workforce development | Professional Training and Coaching | 🇫🇷 Montreuil | 19,244 | 1946 |
| 4 | [SNCF Voyageurs](https://www.tamtam.ai/c/sncf-voyageurs) (sncf-voyageurs.com)<br>SNCF Voyageurs is a subsidiary of the SNCF Group responsible for passenger transportation on the French national railway network | Rail Transportation | 🇫🇷 Saint-Denis | 18,564 | 2020 |
| 5 | [Veolia \| Water Tech](https://www.tamtam.ai/c/veolia-water-tech) (veoliawatertechnologies.com)<br>Provides global water technology expertise, ensuring performance, sustainability, and resource protection for communities and industries through advanced solutions and services. | Environmental Services | 🇫🇷 Aubervilliers | 13,064 |  |
| 6 | [GRDF](https://www.tamtam.ai/c/grdf) (grdf.fr)<br>Manages Europe's largest gas distribution network, delivering natural and renewable gases to nearly 11 million customers in France, supporting energy transition. | Oil and Gas | 🇫🇷 Saint-Denis | 7,313 | 2008 |
| 7 | [BNP Paribas - Securities Services](https://www.tamtam.ai/c/bnp-paribas-securities-services) (cib.bnpparibas)<br>Provides multi-asset post-trade, asset servicing solutions to financial market participants, corporates, and issuers, with an extensive global custody network. | Financial Services | 🇫🇷 Pantin | 6,196 |  |
| 8 | [Veolia \| France](https://www.tamtam.ai/c/veolia-france) (veolia.fr)<br>Provides specialized services for water management, waste treatment, and energy recovery to help cities and industries preserve, access, and renew essential resources. | Environmental Services | 🇫🇷 Aubervilliers | 6,110 | 1853 |
| 9 | [Quick](https://www.tamtam.ai/c/quick) (quick.fr)<br>Leading European hamburger fast food chain, adapting quick service to European tastes, offering varied, gourmet, and convivial dining experiences. | Restaurants | 🇫🇷 Aubervilliers | 5,125 | 1970 |
| 10 | [ACTION CONTRE LA FAIM](https://www.tamtam.ai/c/action-contre-la-faim) (actioncontrelafaim.org)<br>Non-governmental organization saving lives by preventing, detecting, and treating under-nutrition during emergencies and promoting health and food security worldwide. | Non-profit Organizations | 🇫🇷 Montreuil | 4,264 | 1979 |
| 11 | [ALDI France](https://www.tamtam.ai/c/aldi-france) (aldi.fr)<br>A leading European retail company with over 1300 stores and 16,000 employees in France, part of a larger network spanning 8 European countries | Retail | 🇫🇷 Villepinte | 3,792 | 1988 |
| 12 | [Conseil départemental de la Seine-Saint-Denis](https://www.tamtam.ai/c/conseil-departemental-de-la-seine-saint-denis) (seinesaintdenis.fr)<br>The company works to create opportunities for local economic development, ensuring that residents benefit from job initiatives and new actions | Government Administration | 🇫🇷 Bobigny | 3,255 |  |
| 13 | [ACOSS](https://www.tamtam.ai/c/acoss) (linkedin.com)<br>A national organization supports employers and entrepreneurs by advising, informing, and streamlining services, ensuring social protection financing, and promoting responsibility, solidarity, and equity | Government Administration | 🇫🇷 Montreuil | 3,000 |  |
| 14 | [Snop - Groupe FSD](https://www.tamtam.ai/c/snop-groupe-fsd) (snop.eu)<br>Designs, develops, and manufactures metal parts, assemblies, stamping dies, and automatic presses for cars and commercial vehicles. | Motor Vehicle Manufacturing | 🇫🇷 Villepinte | 2,770 |  |
| 15 | [Heppner](https://www.tamtam.ai/c/heppner) (heppner-group.com)<br>Specialist in international transport and logistics solutions across Europe and globally, offering efficient overland, sea, and air deliveries for over 10,000 clients. | Truck Transportation | 🇫🇷 Rosny-sous-Bois | 2,489 | 1925 |
| 16 | [Guerbet](https://www.tamtam.ai/c/guerbet) (guerbet.com)<br>Global leader in medical imaging, offering pharmaceutical products, medical devices, and AI-driven solutions for diagnostic and interventional imaging. Focus on innovation. | Pharmaceutical Manufacturing | 🇫🇷 Villepinte | 2,478 | 1926 |
| 17 | [Médecins du Monde](https://www.tamtam.ai/c/medecins-du-monde) (medecinsdumonde.org)<br>Caring for vulnerable populations, advocating for health access, denouncing human rights violations, and improving health policies across 40 countries. | Non-profit Organizations | 🇫🇷 Saint-Denis | 2,351 | 1980 |
| 18 | [Agence Régionale de Santé Ile-de-France](https://www.tamtam.ai/c/agence-regionale-de-sante-ile-de-france) (linktr.ee)<br>Implements regional health policy, covering prevention, care, and medico-social support, developed in consultation with professionals and users for efficiency and transparency. | Government Administration | 🇫🇷 Saint-Denis | 2,332 | 2010 |
| 19 | [SPIE Facilities](https://www.tamtam.ai/c/spie-facilities) (spie.fr)<br>Maintenance of buildings and facilities across France, focusing on energy performance, technical expertise, and sustainable facility management services. | Facilities Services | 🇫🇷 Saint-Ouen-sur-Seine | 2,066 | 2017 |
| 20 | [Université Sorbonne Paris Nord](https://www.tamtam.ai/c/universite-sorbonne-paris-nord) (univ-spn.fr)<br>A multidisciplinary university located in the northern region of Île-de-France, with campuses in Villetaneuse, Saint-Denis, La Plaine Saint-Denis, Bobigny, and Argenteuil | Higher Education | 🇫🇷 Villetaneuse | 2,033 | 1970 |
| 21 | [Radiall](https://www.tamtam.ai/c/radiall) (radiall.com)<br>Manufactures interconnect components for aerospace, defense, industrial, medical, railway, and telecom industries worldwide, with facilities on three continents. | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Aubervilliers | 1,898 | 1952 |
| 22 | [cabinet d'avocats](https://www.tamtam.ai/c/cabinet-d-avocats-bobigny) (avocat-cisse.fr)<br>Generalist legal firm providing educational, personal, and transparent counsel to individuals and businesses for the dedicated defense of their specific legal interests. | Law Practice | 🇫🇷 Bobigny | 1,832 | 2017 |
| 23 | [Groupe Star's Service](https://www.tamtam.ai/c/groupe-star-s-service) (groupestarservice.com)<br>Provides specialized urban logistics with 25 years experience, focusing on cold chain, healthcare, and lifestyle products, offering home deliveries and e-commerce solutions within specific timeframes. | Consumer Services | 🇫🇷 Épinay-sur-Seine | 1,824 | 1987 |
| 24 | [Generali France](https://www.tamtam.ai/c/generali-france) (generali.fr)<br>Protecting and ensuring the lives of individuals | Insurance | 🇫🇷 Saint-Denis | 1,677 | 1832 |
| 25 | [Lapeyre](https://www.tamtam.ai/c/lapeyre) (lapeyre.fr)<br>Manufacturer of kitchens, bathrooms, windows, doors, stairs, and storage solutions, supporting clients with renovation projects from start to finish with 90 years of expertise | Retail | 🇫🇷 Aubervilliers | 1,641 | 1931 |
| 26 | [MOTUL](https://www.tamtam.ai/c/motul) (motul.com)<br>Formulates, produces, distributes high-quality lubricants across diverse applications, from powersports to heavy-duty industrial uses. Also expanding into vehicle care and advanced thermal fluids. | Oil and Gas | 🇫🇷 Aubervilliers | 1,634 | 1853 |
| 27 | [Petit Forestier Group](https://www.tamtam.ai/c/petit-forestier-group) (petitforestiergroup.com)<br>Specializes in refrigerated vehicle and container rental, providing sustainable cold chain solutions with global presence and personalized full service. | Equipment Rental Services | 🇫🇷 Villepinte | 1,621 | 1907 |
| 28 | [Université Paris 8](https://www.tamtam.ai/c/universite-paris-8) (univ-paris8.fr)<br>A leading university in Paris, specializing in Arts, Literature, Social Sciences, and Humanities, providing students with tools to understand and engage with the contemporary world | Higher Education | 🇫🇷 Saint-Denis | 1,594 | 1969 |
| 29 | [UFCV](https://www.tamtam.ai/c/ufcv) (ufcv.fr)<br>Engages in community social life by deploying animation, leisure, training, inclusion, and support for engagement initiatives. | Civic and Social Organizations | 🇫🇷 Pantin | 1,581 | 1907 |
| 30 | [BERGERAT MONNOYEUR](https://www.tamtam.ai/c/bergerat-monnoyeur) (bm-cat.com)<br>Exclusive distributor of CATERPILLAR construction equipment in multiple countries, known for professionalism, shared values, and serving major international Public Works groups | Machinery Manufacturing | 🇫🇷 Saint-Denis | 1,552 | 1906 |
| 31 | [Randstad France](https://www.tamtam.ai/c/randstad-france) (randstad.fr)<br>This company offers tailored recruitment and HR management solutions, connecting businesses with talent for various sectors including industry, IT, engineering, and finance. | Human Resources Services | 🇫🇷 Saint-Denis | 1,511 | 1973 |
| 32 | [Urssaf Caisse nationale](https://www.tamtam.ai/c/urssaf-caisse-nationale) (urssaf.org)<br>Collects contributions from employers, self-employed, and employees to fund social benefits like healthcare, hospitals, and public transport, supporting economic and social development. | Government Administration | 🇫🇷 Montreuil | 1,470 | 1960 |
| 33 | [SPIE Building Solutions (France)](https://www.tamtam.ai/c/spie-building-solutions-france) (spie.fr)<br>Specializing in reducing building carbon footprint through intelligent solutions and expertise, this organization promotes safer, connected, comfortable, and high-performing buildings | Facilities Services | 🇫🇷 Saint-Ouen-sur-Seine | 1,415 | 2003 |
| 34 | [Société des grands projets](https://www.tamtam.ai/c/societe-des-grands-projets) (societedesgrandsprojets.fr)<br>Development and management of decarbonized transport projects including new metro lines and regional express services to improve daily mobility. | Urban Transit Services | 🇫🇷 Saint-Denis | 1,367 |  |
| 35 | [Groupe Institut de Soudure](https://www.tamtam.ai/c/groupe-institut-de-soudure) (isgroupe.com)<br>Provides joining technology services, testing, inspection, and training worldwide, supporting design, manufacturing, and maintenance with safety and quality focus. | Mechanical Or Industrial Engineering | 🇫🇷 Villepinte | 1,262 | 1905 |
| 36 | [Orange Store](https://www.tamtam.ai/c/orange-store) (orange-store.com)<br>A subsidiary of Orange Group, Orange Store operates in telecom sector with mobile/internet services and physical retail stores, emphasizing customer service and teamwork | Telecommunications | 🇫🇷 Saint-Denis | 1,257 |  |
| 37 | [NAF NAF](https://www.tamtam.ai/c/naf-naf) (nafnaf.com)<br>Designing and selling chic fashion with a touch of madness, empowering girls with freedom and style since 45 years. | Retail Apparel and Fashion | 🇫🇷 Bondy | 1,217 | 1973 |
| 38 | [Université Paris 8 Vincennes-Saint-Denis](https://www.tamtam.ai/c/universite-paris-8-vincennes-saint-denis) (univ-paris8.fr)<br>Higher education institution specializing in cultural sciences, hosting over 21,000 students, numerous research teams, and doctoral schools in Paris. | Higher Education | 🇫🇷 Saint-Denis | 1,177 | 1969 |
| 39 | [Urssaf Ile-de-France](https://www.tamtam.ai/c/urssaf-ile-de-france) (lasecurecrute.fr)<br>Collection and redistribution of social security contributions ensuring workers' social protection and supporting entrepreneurs with compliance and service. | Government Administration | 🇫🇷 Montreuil | 1,142 |  |
| 40 | [Sergent Major](https://www.tamtam.ai/c/sergent-major) (sergent-major.com)<br>Leading French retailer in children's ready-to-wear and childcare, offering creative, quality, and affordable products for children, babies, and expecting mothers. | Retail | 🇫🇷 Montreuil | 1,130 | 1987 |
| 41 | [Université Paris 13](https://www.tamtam.ai/c/universite-paris-13) (univ-spn.fr)<br>Higher education institution offering diverse academic programs across four main campuses located in northern Île-de-France region. | Higher Education | 🇫🇷 Villetaneuse | 1,049 | 1970 |
| 42 | [Paris 2024 - Comité d'organisation des Jeux Olympiques et Paralympiques de 2024](https://www.tamtam.ai/c/paris-2024-comite-d-organisation-des-jeux-olympiques-et-paralympiques-de-2024) (olympics.com)<br>The company plans, organizes, finances, and delivers the Paris 2024 Olympic and Paralympic Games, promotes them internationally, and ensures their sustainability and positive impact | Spectator Sports | 🇫🇷 Saint-Denis | 1,037 | 2018 |
| 43 | [Plaine Commune](https://www.tamtam.ai/c/plaine-commune) (plainecommune.fr)<br>A territory in the Greater Paris region undergoing significant transformation, known for culture, creativity, and hosting events like Paris 2024 Keep updated on social media | Government Administration | 🇫🇷 Saint-Denis | 1,017 | 2000 |
| 44 | [Auchan Bagnolet](https://www.tamtam.ai/c/auchan-bagnolet) (auchan.fr)<br>Large scale retail establishment providing various consumer goods and grocery products through a local hypermarket facility located in the Bagnolet area. | Retail Groceries | 🇫🇷 Bagnolet | 986 | 1992 |
| 45 | [CGR International](https://www.tamtam.ai/c/cgr-international) (cgr-international.com)<br>Global company specializing in co-engineering and serial production of mechanical-end mechatronic components through cold transformation and overmolding of metal, with a focus on quality and supply chain efficiency | Spring and Wire Product Manufacturing | 🇫🇷 Sevran | 980 | 1963 |
| 46 | [Randstad Inhouse](https://www.tamtam.ai/c/randstad-inhouse) (randstad.fr)<br>Providing dedicated onsite HR teams to industrial companies, managing recruitment, flexibility, and productivity to meet production goals efficiently. | Human Resources Services | 🇫🇷 Saint-Denis | 972 |  |
| 47 | [Herta France](https://www.tamtam.ai/c/herta-france) (herta.fr)<br>Company sells charcuterie and ready-meal products in self-service, with strong brand presence in 90% of French households. | Food and Beverage Manufacturing | 🇫🇷 Noisy-le-Grand | 952 |  |
| 48 | [BETC](https://www.tamtam.ai/c/betc) (betc.com)<br>Innovative communication agency creating new synergies, producing own content in music, film, design Award-winning with a focus on creativity and innovation | Advertising Services | 🇫🇷 Pantin | 944 | 1994 |
| 49 | [UNION TECHNIQUE DU BATIMENT](https://www.tamtam.ai/c/union-technique-du-batiment) (utb.fr)<br>Construction company specializing in building projects, providing construction services and solutions in Pantin, Seine Saint Denis, France. | Construction | 🇫🇷 Romainville | 929 | 1933 |
| 50 | [Groupe VILAVI](https://www.tamtam.ai/c/groupe-vilavi) (vilavi.fr)<br>Expert insurance and credit broker, proposing tailored solutions at the best price and supporting clients from analysis to project completion. | Insurance | 🇫🇷 Montreuil | 916 |  |
| 51 | [GEH - Groupe Europe Handling](https://www.tamtam.ai/c/geh-groupe-europe-handling) (geh.aero)<br>Provides innovative, efficient airport services, encompassing passenger and baggage handling, ground support, traffic operations, cargo management, and maintenance for airlines worldwide since 1994. | Airlines and Aviation | 🇫🇷 Tremblay-en-France | 911 | 1994 |
| 52 | [Groupe Randstad France](https://www.tamtam.ai/c/groupe-randstad-france) (grouperandstad.fr)<br>Specialist in HR services, offering recruitment, integration, management, training, and mobility solutions to companies and candidates, with a strong focus on shaping the world of work | Human Resources Services | 🇫🇷 Saint-Denis | 903 |  |
| 53 | [Simplon.co](https://www.tamtam.ai/c/simplon-co) (simplon.co)<br>Simplon aims to promote digital inclusion by training diverse talents in high-demand technical skills, with a focus on underrepresented groups and career changers | Professional Training and Coaching | 🇫🇷 Montreuil | 850 |  |
| 54 | [DHL Express France](https://www.tamtam.ai/c/dhl-express-france) (dhlexpress.fr)<br>Global leader in international express transport providing carbon-conscious logistics, parcel delivery, and supply chain solutions for business and individual customers through extensive networks. | Transportation, Logistics, Supply Chain and Storage | 🇫🇷 Le Bourget | 828 | 1969 |
| 55 | [Ville de Montreuil](https://www.tamtam.ai/c/ville-de-montreuil) (montreuil.fr)<br>Local government providing public services and employment opportunities for residents in a densely populated urban area in Île-de-France. | Government Administration | 🇫🇷 Montreuil | 823 |  |
| 56 | [e.SNCF Solutions](https://www.tamtam.ai/c/e-sncf-solutions) (linkedin.com)<br>Digital factory supporting SNCF Group with cybersecurity, digital workplace, connectivity, application development, data, AI, and innovation labs. | Technology, Information and Internet | 🇫🇷 Saint-Denis | 801 |  |
| 57 | [BWT France](https://www.tamtam.ai/c/bwt-france) (bwt.com)<br>A subsidiary of BWT, specializing in water treatment solutions for domestic, public, and industrial sectors, with a focus on innovation and eco-friendly practices | Industrial Machinery Manufacturing | 🇫🇷 Saint-Denis | 769 | 1990 |
| 58 | [UNSA](https://www.tamtam.ai/c/unsa) (unsa.org)<br>A interprofessional union founded in 1993, promoting sustainable social progress, fighting exclusion, advocating for a social Europe, and defending employment and public services | Civic and Social Organizations | 🇫🇷 Bagnolet | 764 | 1993 |
| 59 | [Cuisine Plus](https://www.tamtam.ai/c/cuisine-plus) (cuisine-plus.fr)<br>The company specializes in custom kitchens, offering over 80 models and 10,000 color combinations, with a focus on customer satisfaction and franchise opportunities | Furniture and Home Furnishings Manufacturing | 🇫🇷 Tremblay-en-France | 727 | 1984 |
| 60 | [Solutions30 France](https://www.tamtam.ai/c/solutions30-france) (solutions30.com)<br>The company provides technological solutions to individuals and businesses in Europe in areas such as IT, telecom, energy, connected devices, security, and facility management | IT Services and IT Consulting | 🇫🇷 Saint-Denis | 695 |  |
| 61 | [Académie de La Réunion](https://www.tamtam.ai/c/academie-de-la-reunion) (ac-reunion.fr)<br>Administrative district managing regional educational policies and coordination between national education ministry and local government authorities in La Réunion region. | Government Administration | 🇫🇷 Saint-Denis | 690 | 1984 |
| 62 | [AIDES](https://www.tamtam.ai/c/aides) (aides.org)<br>A leading HIV/AIDS organization in France and Europe, providing support, resources, and empowerment for those affected by the virus | Non-profit Organizations | 🇫🇷 Pantin | 684 | 1984 |
| 63 | [ARKANCE](https://www.tamtam.ai/c/arkance) (arkance.world)<br>Provides digital transformation solutions and expert services for architecture, engineering, construction, and manufacturing industries, optimizing design, build, and manufacturing processes. | IT Services and IT Consulting | 🇫🇷 Saint-Denis | 679 |  |
| 64 | [Du Pareil Au Même](https://www.tamtam.ai/c/du-pareil-au-meme) (dpam.com)<br>Specializing in children's clothing, this company founded in 1986 distributes clothes, shoes, and accessories for babies and children up to 14 years old in over 21 countries | Textile Manufacturing | 🇫🇷 Montreuil | 677 | 1986 |
| 65 | [ESIEE PARIS](https://www.tamtam.ai/c/esiee-paris) (esiee.fr)<br>Offers engineering education in IT, security, AI, Industry 4.0, electronics, energy, civil engineering, digital health, and arts and sciences. | Higher Education | 🇫🇷 Noisy-le-Grand | 670 | 1904 |
| 66 | [Ville de Saint-Denis](https://www.tamtam.ai/c/ville-de-saint-denis) (ville-saint-denis.fr)<br>Local government providing public services, supporting daily life and personal projects for approximately 115,000 residents in Saint-Denis. | Government Administration | 🇫🇷 Saint-Denis | 666 |  |
| 67 | [Orange Bank](https://www.tamtam.ai/c/orange-bank) (orangeobk.fr)<br>A rapidly evolving digital and human-centric bank, part of Orange group, seeking diverse talents to launch the first 100% mobile bank | Banking | 🇫🇷 Montreuil | 665 | 2002 |
| 68 | [Protection Civile française](https://www.tamtam.ai/c/protection-civile-francaise) (protection-civile.org)<br>Volunteer organization providing civil protection through assistance, emergency response, and training to safeguard populations during peace and crises. | Public Safety | 🇫🇷 Pantin | 658 | 1965 |
| 69 | [Hub One](https://www.tamtam.ai/c/hub-one) (hubone.fr)<br>Hub One, a technology group, provides digital evolution services for businesses in various sectors They offer connectivity solutions for communication, networking, and mobility | Telecommunications | 🇫🇷 Tremblay-en-France | 645 | 2001 |
| 70 | [Groupe Delineo](https://www.tamtam.ai/c/groupe-delineo) (franchise-delineo.fr)<br>This company is a merger between Rush group and La Croissanterie group, combining resources and expertise for enhanced business operations | Restaurants | 🇫🇷 Saint-Denis | 638 | 2019 |
| 71 | [FranceAgriMer](https://www.tamtam.ai/c/franceagrimer) (franceagrimer.fr)<br>A national establishment under the French Ministry for Agriculture, providing economic expertise, market monitoring, and strategic support for the agriculture and sea sectors | Government Administration | 🇫🇷 Montreuil | 636 | 2009 |
| 72 | [POPEYE](https://www.tamtam.ai/c/popeye)<br>Restaurant company based in France, operating at 2 locations Providing a diverse menu of dishes in a casual dining atmosphere | Restaurants | 🇫🇷 Neuilly-sur-Marne | 631 |  |
| 73 | [EXTIME](https://www.tamtam.ai/c/extime) (extime.com)<br>Luxury retail and hospitality brand offering travelers a unique airport experience with dining, shopping, lounges, concierge services, and entertainment options | International Trade and Development | 🇫🇷 Tremblay-en-France | 629 |  |
| 74 | [KDI](https://www.tamtam.ai/c/kdi-saint-denis) (kdi.fr)<br>French leader in generalist distribution of metallurgical products and associated supplies with extensive stock and specialized agency network. | Wholesale | 🇫🇷 Saint-Denis | 624 |  |
| 75 | [SNCF Voyageurs Matériel](https://www.tamtam.ai/c/sncf-voyageurs-materiel) (sncf-voyageurs.com)<br>Manages maintenance for nearly 17,000 rolling stock units. Provides high-level industrial performance, ensuring safety, quality, and technical expertise for internal and external clients. | Rail Transportation | 🇫🇷 Saint-Denis | 606 |  |
| 76 | [Mairie de Saint Denis](https://www.tamtam.ai/c/mairie-de-saint-denis) (saintdenis.re)<br>Established in 1669, this company became the capital of the island in 1738 with a population of 2,166 Today, it is the largest city overseas with nearly 150,000 residents spread across over 140 km², ranging from 0 to 2276 meters in altitude | Government Administration | 🇫🇷 Saint-Denis | 604 | 1669 |
| 77 | [PROVA](https://www.tamtam.ai/c/prova) (prova.fr)<br>Family-owned French company with over 75 years of expertise in extracting vanilla, cocoa, and producing natural brown flavor aromas. | Food and Beverage Manufacturing | 🇫🇷 Montreuil | 592 | 1946 |
| 78 | [Ville de Pantin](https://www.tamtam.ai/c/ville-de-pantin) (pantin.fr)<br>A dynamic and creative city near Paris, Pantin preserves its industrial heritage while attracting businesses, artisans, and cultural institutions, fostering excellence and solidarity | Government Administration | 🇫🇷 Pantin | 582 |  |
| 79 | [vente-unique.com](https://www.tamtam.ai/c/vente-unique-com) (vente-unique.com)<br>Online retailer specializing in direct sales of furniture and home decor across multiple European countries with competitive pricing and quality control. | Retail Furniture and Home Furnishings | 🇫🇷 Le Pré-Saint-Gervais | 574 | 2006 |
| 80 | [Emmaüs France](https://www.tamtam.ai/c/emmaus-france) (emmaus-france.org)<br>Fighting poverty and exclusion since 1949, operating a pioneer circular and solidarity economy, through various social action and housing structures. | Civic and Social Organizations | 🇫🇷 Montreuil | 554 | 1985 |
| 81 | [Cour nationale du droit d'asile (CNDA)](https://www.tamtam.ai/c/cour-nationale-du-droit-d-asile-cnda) (cnda.fr)<br>Specialized administrative court in France responsible for reviewing asylum decisions and appeals against the decisions of the French Office for Refugees and Stateless Persons | Government Administration | 🇫🇷 Montreuil | 549 |  |
| 82 | [Mutuaide](https://www.tamtam.ai/c/mutuaide) (mutuaide.fr)<br>Specializing in affinity services for 40 years, this company offers assistance, insurance, and services for travel, mobility, health, daily life, and event medicalization | Insurance | 🇫🇷 Noisy-le-Grand | 530 | 1981 |
| 83 | [DB Cargo France](https://www.tamtam.ai/c/db-cargo-france) (dbcargo.com)<br>Provides diverse rail freight solutions from single wagons to full trains, including combined transport across France and to bordering countries for various goods. | Rail Transportation | 🇫🇷 Aubervilliers | 527 | 2005 |
| 84 | [SJT - Solidarité et Jalons pour le Travail](https://www.tamtam.ai/c/sjt-solidarite-et-jalons-pour-le-travail) (sjt-formation.com)<br>A professional training operator since 1979, specializing in assisting young and adult learners with job placement, recognized regionally and nationally Holder of the Social Utility Solidarity Enterprise label | Professional Training and Coaching | 🇫🇷 Montreuil | 526 | 1979 |
| 85 | [DASSAULT FALCON SERVICE](https://www.tamtam.ai/c/dassault-falcon-service) (dassaultfalconservice.com)<br>Expert in business aviation since 1967, offering maintenance, management, technical, and flight services for Falcon business jets in Europe. | Airlines and Aviation | 🇫🇷 Le Bourget | 522 | 1967 |
| 86 | [Economat des armées](https://www.tamtam.ai/c/economat-des-armees) (economat-armees.com)<br>Central purchasing and service provider supporting defense administrative units with food supply, collective catering, general goods, transport, and camp management. | Defense and Space Manufacturing | 🇫🇷 Pantin | 521 | 1959 |
| 87 | [ICTS FRANCE](https://www.tamtam.ai/c/icts-france) (ictsfrance.fr)<br>Provides aviation and airport security, general safety, training, audit, and consulting services across multiple high-value sectors in France. | Public Safety | 🇫🇷 Tremblay-en-France | 520 | 1982 |
| 88 | [Empruntis](https://www.tamtam.ai/c/empruntis) (empruntis.com)<br>Established in 2000, Empruntiscom offers a range of financial products like mortgages, consumer loans, credit restructuring, and insurance, working with numerous partners nationwide | Financial Services | 🇫🇷 Saint-Denis | 516 | 2000 |
| 89 | [BATISANTÉ](https://www.tamtam.ai/c/batisante) (batisante.fr)<br>BATISANTÉ protects 100,000 properties in France against fire, pests, regulatory risks, and breakdowns, simplifying life for real estate professionals with expert services Visit batisantefr for more information | Environmental Services | 🇫🇷 Neuilly-Plaisance | 516 | 1987 |
| 90 | [UCANSS](https://www.tamtam.ai/c/ucanss) (ucanss.fr)<br>It is an employer federation for Social Security, managing social dialogue, offering HR, purchasing, and real estate services, and promoting innovation and efficiency for its clients. | Government Administration | 🇫🇷 Montreuil | 511 | 1970 |
| 91 | [GROUPE CORIANCE](https://www.tamtam.ai/c/groupe-coriance) (groupe-coriance.fr)<br>Providing high-performance and cost-effective energy solutions while minimizing environmental impact, specializing in renewable energy sources like geothermal, biomass, and cogeneration | Environmental Services | 🇫🇷 Noisy-le-Grand | 509 | 1998 |
| 92 | [La Brosse & Dupont](https://www.tamtam.ai/c/la-brosse-and-dupont) (labrosseetdupont.fr)<br>A leading company in designing, distributing, and marketing a wide range of household products worldwide through 18 structured brands | Manufacturing | 🇫🇷 Villepinte | 492 | 1845 |
| 93 | [Mairie d'Aubervilliers](https://www.tamtam.ai/c/mairie-d-aubervilliers) (aubervilliers.fr)<br>Local government managing public services and urban development for a dynamic city with over 92,000 residents and 1800 employees. | Government Administration | 🇫🇷 Aubervilliers | 489 | 2021 |
| 94 | [CMP](https://www.tamtam.ai/c/cmp-le-blanc-mesnil) (cmp-paris.com)<br>Designs, supplies, and imports over 7,000 personal and household products across multiple categories, serving clients in France and 75 countries. | Wholesale Import and Export | 🇫🇷 Le Blanc-Mesnil | 489 | 1957 |
| 95 | [Ville de Noisy-le-Grand](https://www.tamtam.ai/c/ville-de-noisy-le-grand) (noisylegrand.fr)<br>Local government serving a population of 70,000 residents | Government Administration | 🇫🇷 Noisy-le-Grand | 471 |  |
| 96 | [Grand Paris Express](https://www.tamtam.ai/c/grand-paris-express) (grandparisexpress.fr)<br>Public organization creating the new Grand Paris automated metro, responsible for designing, developing, and building the network's infrastructure and stations | Urban Transit Services | 🇫🇷 Saint-Denis | 454 | 2011 |
| 97 | [Crédit Agricole La Réunion - Mayotte](https://www.tamtam.ai/c/credit-agricole-la-reunion-mayotte) (credit-agricole.fr)<br>A mutual bank supporting individuals, professionals, farmers, and associations with their projects in Réunion and Mayotte for over 72 years | Banking | 🇫🇷 Saint-Denis | 442 | 1950 |
| 98 | [CAMAS](https://www.tamtam.ai/c/camas) (camastraining.com)<br>Training airport and aviation professionals worldwide with over 250 courses in ground handling, safety, management, and customer service. | Professional Training and Coaching | 🇫🇷 Tremblay-en-France | 441 | 2001 |
| 99 | [Extime Duty Free Paris](https://www.tamtam.ai/c/extime-duty-free-paris)<br>Leading airport retail operator offering premium shopping experiences with diverse brands, excellent design, and personalized customer service at airports. | Retail | 🇫🇷 Tremblay-en-France | 439 |  |
| 100 | [Veolia \| Engineering & Consulting](https://www.tamtam.ai/c/veolia-engineering-and-consulting) (engineering-consulting.veolia.com)<br>Consulting engineering and strategic assistance division specializing in designing sustainable solutions for public, industrial, and tertiary sectors, focusing on resource management and performance improvement | Environmental Services | 🇫🇷 Aubervilliers | 436 |  |

## 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 Seine-Saint-Denis department

- [Multinational companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/multinational-companies-seine-saint-denis) (198)
- [Companies with in-house R&D in the Seine-Saint-Denis department](https://www.tamtam.ai/l/r-and-d-companies-seine-saint-denis) (102)
- [Retail chains in the Seine-Saint-Denis department](https://www.tamtam.ai/l/retail-chains-seine-saint-denis) (101)
- [Public sector organisations in the Seine-Saint-Denis department](https://www.tamtam.ai/l/public-sector-organisations-seine-saint-denis) (91)
- [Distributors and wholesalers in the Seine-Saint-Denis department](https://www.tamtam.ai/l/distributors-and-wholesalers-seine-saint-denis) (81)
- [IT services companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/it-services-companies-seine-saint-denis) (79)
- [IT Services and IT Consulting companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-seine-saint-denis) (78)
- [Manufacturers in the Seine-Saint-Denis department](https://www.tamtam.ai/l/manufacturers-seine-saint-denis) (72)
- [Professional services firms in the Seine-Saint-Denis department](https://www.tamtam.ai/l/professional-services-firms-seine-saint-denis) (71)
- [Education providers in the Seine-Saint-Denis department](https://www.tamtam.ai/l/education-companies-seine-saint-denis) (69)
- [Hardware manufacturers in the Seine-Saint-Denis department](https://www.tamtam.ai/l/hardware-companies-seine-saint-denis) (58)
- [Critical infrastructure operators in the Seine-Saint-Denis department](https://www.tamtam.ai/l/critical-infrastructure-operators-seine-saint-denis) (53)
- [Government Administration companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/government-administration-companies-seine-saint-denis) (53)
- [Family-owned companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/family-owned-companies-seine-saint-denis) (50)
- [Consulting firms in the Seine-Saint-Denis department](https://www.tamtam.ai/l/consulting-firms-seine-saint-denis) (44)
- [Companies with a mobile app in the Seine-Saint-Denis department](https://www.tamtam.ai/l/companies-with-mobile-app-seine-saint-denis) (44)
- [Construction companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/construction-companies-seine-saint-denis) (44)
- [Logistics companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/logistics-companies-seine-saint-denis) (40)
- [Professional Training and Coaching companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/professional-training-and-coaching-companies-seine-saint-denis) (39)
- [Advertising Services companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/advertising-services-companies-seine-saint-denis) (37)
- [SaaS companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/saas-companies-seine-saint-denis) (37)
- [Civic and Social Organizations companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/civic-and-social-organizations-companies-seine-saint-denis) (36)
- [Environmental Services companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/environmental-services-companies-seine-saint-denis-france) (36)
- [Software Development companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/software-development-companies-seine-saint-denis) (35)

## 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-seine-saint-denis