The Hauts-de-Seine department hosts a concentration of large and mid-sized hardware manufacturers, with a significant presence in industrial technology, defense, and telecommunications. Companies like Schneider Electric specialize in energy management and automation, while Thales focuses on cybersecurity and defense. Nexans is a key player in cable systems, and Dassault Aviation designs military aircraft and business jets. This group includes established firms like Faiveley Transport, founded in 1919, and newer entities such as SAGEMCOM, established in 2008.
Many of these companies are engaged in critical infrastructure and advanced technological solutions. For instance, Worldline and Ingenico are prominent in financial services and payment technology. GE Renewable Energy and GE Grid Solutions contribute to the energy sector, particularly in renewable resources and power delivery. A notable pattern is the strong representation of companies involved in global industrial and technological solutions, often with a focus on sustainability and digital transformation.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Schneider Electricse.com
Global energy technology leader, providing efficiency and sustainability through electrifying, automating, and digitalizing industries, businesses, and homes with intelligent devices and digital services. |
87,938 | |||
| 2 |
Thalesthalesgroup.com
Multinational specializing in cybersecurity, defense, aerospace, digital identity, and secure communications for governments and industries. |
65,031 | |||
| 3 |
Worldlineworldline.com
Helps businesses accelerate their growth journey quickly, simply, and securely with advanced payments technology, local expertise, and customized solutions. |
15,714 | |||
| 4 |
Nexansnexans.com
Design, manufacture, and services for cable systems across transmission, grid, connectivity, and industry sectors, focusing on sustainable, decarbonized electricity. |
8,776 | |||
| 5 |
Dassault Aviationdassault-aviation.com
French aerospace company designs, builds military aircraft, business jets, and space systems. Leader in new generation fighters, Rafale, Falcon jets, and pioneering digital technologies. |
7,267 | |||
| 6 |
SAGEMCOMsagemcom.com
Provides innovative broadband internet, entertainment, and managed energy solutions. Designs sustainable technology, leader in its markets, with employee ownership. |
5,279 | |||
| 7 |
GE Renewable Energyge.com
Engineers energy products and digital services using wind, solar, and hydro resources for global customers, delivering affordable, reliable, and sustainable power. |
4,994 | |||
| 8 |
GE Grid Solutionsgevernova.com
Provides utilities and industries with equipment, systems, services for reliable power delivery from generation to consumers, focusing on renewable integration and energy transition acceleration. |
4,934 | |||
| 9 |
APC by Schneider Electricapc.com
Provides reliable, efficient, connected, and innovative products for IT equipment, ensuring accessibility and security for dynamic IT in a connected world. |
4,378 | |||
| 10 |
Ingenicoingenico.com
Provides global payment acceptance and services, deploying millions of payment devices and powering thousands of apps to simplify payments and add value. |
4,265 | |||
| 11 |
Alcatel-Lucent Enterpriseal-enterprise.com
Provides secure networking and communication solutions with built-in security, environmental focus, and compliance for organizations worldwide. |
4,055 | |||
| 12 |
Quadientquadient.com
This company helps simplify customer connections through Intelligent Communication Automation, Parcel Locker Solutions, and Mail-Related Solutions, striving for customer experience excellence |
3,963 | |||
| 13 |
Faiveley Transportwabtec.com
Designs, manufactures, markets, and maintains advanced components, systems, and services for safe, reliable, and cost-efficient trains and buses, focusing on innovation and customer needs. |
3,432 | |||
| 14 | 2,986 | ||||
| 15 |
Sogetrelsogetrel.fr
A leader in digital transformation, specializing in digital infrastructure services and connected devices to enhance citizens' lives, business performance, and sustainable development |
2,581 | |||
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 |
Arabelle Solutionsarabellesolutions.com
Provides nuclear turbine island technology, services for power plants, including steam turbines, generators, pumps, heat-exchangers, and cybersecurity solutions worldwide. |
2,335 | |||
| 17 |
VitalAirevitalaire.com
Empowering individuals with chronic diseases at home through personalized support, collaborating with healthcare professionals, and transforming healthcare systems by integrating home care pathways. |
2,333 | |||
| 18 | 2,281 | ||||
| 19 | 2,054 | ||||
| 20 |
Asteelflashasteelflash.com
Provides electronic manufacturing services and supply-chain management solutions from new product introduction to mass production across diverse global technology markets through seventeen locations. |
1,878 | |||
| 21 |
Eutelsateutelsat.com
Delivers connectivity and broadcast services worldwide. Operates a global fleet of 37 Geostationary satellites and over 600 Low Orbit earth satellites for diverse markets. |
1,755 | |||
| 22 | 1,741 | ||||
| 23 | 1,740 | ||||
| 24 |
Hilti Francehilti.fr
Provides advanced tools, technologies, software, and services for the construction industry, helping clients build faster, safer, and more boldly worldwide, with a focus on innovation. |
1,675 | |||
| 25 |
TSG Grouptsg-solutions.com
Design, construction, and maintenance of energy distribution infrastructures including electric vehicle charging, hydrogen, biofuels, and payment systems for mobility. |
1,513 | |||
| 26 |
Trèves Grouptreves-group.com
Designs, develops, and manufactures automotive acoustic solutions improving vehicle interior comfort by reducing noise pollution for major international manufacturers. |
1,265 | |||
| 27 | 1,264 | ||||
| 28 |
STMicroelectronics Francest.com
Design and manufacture semiconductor components, enabling smart mobility, efficient energy management, IoT deployment, and sustainable technology ecosystems. |
1,236 | |||
| 29 | 
THALES SIX GTS FRANCE SAS
A management consulting company based in Îledefrance, France, specializing in providing solutions and services to businesses in various industries |
1,143 | |||
| 30 |
Vusionvusion.com
Develops AI-powered digitalization solutions for physical commerce, transforming stores into intelligent environments, improving operations, enabling e-commerce, and activating in-store retail media. |
1,113 | |||
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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 11, 2026.
More company lists in the Hauts-de-Seine department
- The largest companies in the Hauts-de-Seine department 5,160
- Multinational companies in the Hauts-de-Seine department 1,231
- IT services companies in the Hauts-de-Seine department 737
- IT Services and IT Consulting companies in the Hauts-de-Seine department 706
- Professional services firms in the Hauts-de-Seine department 629
- Consulting firms in the Hauts-de-Seine department 563
- Companies with in-house R&D in the Hauts-de-Seine department 510
- SaaS companies in the Hauts-de-Seine department 389
- Business Consulting and Services companies in the Hauts-de-Seine department 304
- Software Development companies in the Hauts-de-Seine department 301
- Retail chains in the Hauts-de-Seine department 292
- Manufacturers in the Hauts-de-Seine department 285
- Advertising Services companies in the Hauts-de-Seine department 281
- Marketing and communications agencies in the Hauts-de-Seine department 235
- Subscription businesses in the Hauts-de-Seine department 228
- Financial services firms in the Hauts-de-Seine department 198
- Companies with a mobile app in the Hauts-de-Seine department 189
- Critical infrastructure operators in the Hauts-de-Seine department 169
- AI companies in the Hauts-de-Seine department 159
- Education providers in the Hauts-de-Seine department 159
- Cybersecurity companies in the Hauts-de-Seine department 154
- Distributors and wholesalers in the Hauts-de-Seine department 154
- Recruitment and staffing agencies in the Hauts-de-Seine department 152
- Energy companies in the Hauts-de-Seine department 144
The same list elsewhere in France
- Hardware manufacturers in France 4,256
- Hardware manufacturers in Île-de-France 1,142
- Hardware manufacturers in Auvergne-Rhône-Alpes 794
- Hardware manufacturers in Grand Est 342
- Hardware manufacturers in Occitanie 291
- Hardware manufacturers in Nouvelle-Aquitaine 290
- Hardware manufacturers in Provence-Alpes-Côte d'Azur 263
- Hardware manufacturers in Pays de la Loire 251
- Hardware manufacturers in the Rhône department 243
- Hardware manufacturers in Hauts-de-France 212
- Hardware manufacturers in Bourgogne-Franche-Comté 163
- Hardware manufacturers in Brittany 148
- Hardware manufacturers in the Isère department 143
- Hardware manufacturers in the Bouches-du-Rhône department 142
- Hardware manufacturers in the Haute-Garonne department 137
- Hardware manufacturers in Normandy 135
- Hardware manufacturers in Centre-Val de Loire 128
- Hardware manufacturers in the Nord department 124
- Hardware manufacturers in the Essonne department 114
- Hardware manufacturers in the Yvelines department 106
- Hardware manufacturers in the Gironde department 100
- Hardware manufacturers in the Loire-Atlantique department 86
- Hardware manufacturers in the Seine-et-Marne department 84
- Hardware manufacturers in Paris 351