This selection of companies in Seine-Saint-Denis showcases a diverse industrial landscape, with a notable presence of large and mid-sized firms engaged in environmental services, manufacturing, and higher education. Veolia, for instance, provides global water technology expertise and specialized services for water management. GRDF manages Europe's largest gas distribution network, while Guerbet is a global leader in medical imaging.
Other significant players include Snop - Groupe FSD, which designs and manufactures metal parts for vehicles, and Radiall, a manufacturer of interconnect components for various industries. Université Sorbonne Paris Nord and Université Paris 8 Vincennes-Saint-Denis represent the strong academic presence. A clear pattern is the concentration of headquarters in Aubervilliers, Saint-Denis, and Villepinte, indicating these cities as key economic hubs within the department.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Veolia | Water Techveoliawatertechnologies.com
Provides global water technology expertise, ensuring performance, sustainability, and resource protection for communities and industries through advanced solutions and services. |
13,064 | |||
| 2 | 7,313 | ||||
| 3 |
Veolia | Franceveolia.fr
Provides specialized services for water management, waste treatment, and energy recovery to help cities and industries preserve, access, and renew essential resources. |
6,110 | |||
| 4 |
Snop - Groupe FSDsnop.eu
Designs, develops, and manufactures metal parts, assemblies, stamping dies, and automatic presses for cars and commercial vehicles. |
2,770 | |||
| 5 |
Guerbetguerbet.com
Global leader in medical imaging, offering pharmaceutical products, medical devices, and AI-driven solutions for diagnostic and interventional imaging. Focus on innovation. |
2,478 | |||
| 6 |
Université Sorbonne Paris Norduniv-spn.fr
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 |
2,033 | |||
| 7 |
Radiallradiall.com
Manufactures interconnect components for aerospace, defense, industrial, medical, railway, and telecom industries worldwide, with facilities on three continents. |
1,898 | |||
| 8 |
Groupe Institut de Soudureisgroupe.com
Provides joining technology services, testing, inspection, and training worldwide, supporting design, manufacturing, and maintenance with safety and quality focus. |
1,262 | |||
| 9 |
Université Paris 8 Vincennes-Saint-Denisuniv-paris8.fr
Higher education institution specializing in cultural sciences, hosting over 21,000 students, numerous research teams, and doctoral schools in Paris. |
1,177 | |||
| 10 |
CGR Internationalcgr-international.com
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 |
980 | |||
| 11 |
ARKANCEarkance.world
Provides digital transformation solutions and expert services for architecture, engineering, construction, and manufacturing industries, optimizing design, build, and manufacturing processes. |
679 | |||
| 12 |
ESIEE PARISesiee.fr
Offers engineering education in IT, security, AI, Industry 4.0, electronics, energy, civil engineering, digital health, and arts and sciences. |
670 | |||
| 13 |
SNCF Voyageurs Matérielsncf-voyageurs.com
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. |
606 | |||
| 14 | 592 | ||||
| 15 |
Veolia | Engineering & Consultingengineering-consulting.veolia.com
Consulting engineering and strategic assistance division specializing in designing sustainable solutions for public, industrial, and tertiary sectors, focusing on resource management and performance improvement |
436 | |||
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. | |||||
| 16 |
RATP Smart Systemsratpsmartsystems.com
Expert in passenger information and ticketing services, providing seamless solutions adaptable to different environments Specializes in smart traveler information and e-ticketing solutions |
367 | |||
| 17 |
Saint-Gobain Innovation Hub Europesgr-paris.saint-gobain.com
Research center develops high-level skills, technologies for group activities, interacts with academia, anticipates scientific advances, recruits talent. |
360 | |||
| 18 |
Aperam Franceaperam.com
Global producer of stainless and electrical steels delivering customized industrial solutions through integrated distribution networks and production sites across Europe and Brazil. |
278 | |||
| 19 | 250 | ||||
| 20 |
EOL Groupeol-group.net
Designs and manufactures French office furniture combining functionality, creativity, and durability with responsible production and comprehensive workspace solutions. |
232 | |||
| 21 |
Orisha Real Estaterealestate.orisha.com
Editor of SaaS software for real estate professionals. Guides clients in sector challenges, development, and essential solutions for property transactions, management, and assets. |
217 | |||
| 22 |
ISAE-Supméca – Institut supérieur de mécanique de Parisisae-supmeca.fr
Public higher education institution trains mechanical engineers with strong scientific, technical, and digital engineering skills in design and production, CTI certified. |
205 | |||
| 23 |
EVA - Esports Virtual Arenaseva.gg
Innovative VR esports company offering unique gaming experiences in real arenas up to 1000m2, allowing players to compete against each other |
188 | |||
| 24 | 180 | ||||
| 25 |
MARIE-LAURE PLV MERCHANDISINGmarie-laure-plv.fr
A leader in customer experience at the point of sale for cosmetics, pharmacy, spirits, and jewelry Specializes in eco-design and recycling |
177 | |||
| 26 |
Vulcanicvulcanic.com
Design and manufacture electrical heating and cooling solutions including temperature control and power supply for industrial applications worldwide. |
168 | |||
| 27 |
COMATELEC SCHREDERfr.schreder.com
Design and supply of intelligent outdoor lighting solutions for smart cities, roads, tunnels, industry, and decorative urban illumination. |
164 | |||
| 28 |
ARICaric-sa.fr
Aric is a leading French manufacturer of professional lighting products since 1946, offering a wide range of lamps and fixtures |
157 | |||
| 29 |
AML Systems - Johnson Electric Groupjohnsonelectric.com
Design and supply of advanced smart actuators and value-added products for automotive lighting, focusing on quality and innovation. |
132 | |||
| 30 |
MILLS Echafaudage - Etaiement - Coffragemills.fr
Designs, sells, rents, and installs scaffolding and shoring products for construction and heritage building sectors with innovative solutions. |
125 | |||
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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 13, 2026.
More company lists in the Seine-Saint-Denis department
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- IT services companies in the Seine-Saint-Denis department 79
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- Manufacturers in the Seine-Saint-Denis department 72
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- Government Administration companies in the Seine-Saint-Denis department 53
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- Professional Training and Coaching companies in the Seine-Saint-Denis department 39
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- SaaS companies in the Seine-Saint-Denis department 37
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- Environmental Services companies in the Seine-Saint-Denis department 36
- Software Development companies in the Seine-Saint-Denis department 35
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