The largest companies in Yvelines are primarily engaged in manufacturing, with a strong emphasis on the automotive and aerospace sectors. Notable firms include Groupe PSA, a major automaker and mobility provider; ArianeGroup, which designs and manufactures space launch systems; SAVENCIA, a family-owned food group; and KNDS France, specializing in armored vehicles and artillery. These companies represent a mix of well-established industrial groups and some newer ventures.
A significant concentration of these manufacturers is found in Velizy-Villacoublay, which hosts several key players such as Groupe PSA, Novares Group, and Safran Landing Systems. Other important hubs include Versailles, home to KNDS France and Arquus, and Poissy, where Peugeot is based. This geographic distribution highlights specific industrial zones within the department.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Groupe PSAgroupe-psa.com
Leading automaker and mobility provider; now known as Stellantis. This entity is one of the world's foremost in vehicle manufacturing and mobility solutions. |
16,153 | |||
| 2 |
Peugeotpeugeot.com
Offers customers exhilarating, quality driving experiences through racy design and uncompromised quality, adding excitement to every journey. |
9,490 | |||
| 3 |
SAVENCIAsavencia.com
Family-owned food group valorizing milk and cocoa sectors for high-quality products, strong brands, meeting consumer expectations and supporting culinary professionals worldwide. |
9,109 | |||
| 4 |
ArianeGroupariane.group
Designing, developing, manufacturing, and operating space launch systems and strategic missiles for space and defense sectors. |
6,651 | |||
| 5 |
KRYS GROUPkrys-group.com
The company operates in optical and hearing health, distributing and manufacturing eyewear. It is a cooperative, focusing on human values and innovation for its products. |
3,310 | |||
| 6 |
KNDS Franceknds.com
Designing, developing, producing armored vehicles, artillery, guns, turrets, ammunition, and robotic systems, with customer support, for armed forces land combat challenges. |
2,894 | |||
| 7 |
Novares Groupnovaresteam.com
Designs, manufactures complex plastic components and systems for the automotive industry, focusing on greener, lighter, and connected cars with intuitive interfaces. |
2,833 | |||
| 8 | 
Safran Landing Systemssafran-group.com
Specializes in landing gear systems, providing innovative solutions for aircraft safety, performance, and maintenance in both commercial and military sectors. |
1,717 | |||
| 9 | 1,469 | ||||
| 10 |
Fenwick-Lindebit.ly
Listening to clients, creating innovative, tailored material handling solutions, with a focus on forklifts, intralogistics, robotics, and energy efficiency. |
1,376 | |||
| 11 |
Arquusarquus-defense.com
Leading supplier of ground military vehicles to the French army, combining expertise from Renault Trucks Defense, ACMAT, and Panhard, with 130 years of automotive history. |
1,309 | |||
| 12 |
SOURIAU-SUNBANK Connection Technologies by Eatonsouriau.com
An intelligent power management company focused on improving quality of life, protecting the environment, and helping customers manage power efficiently |
965 | |||
| 13 |
Jungheinrich France SASjungheinrich.fr
International leader in handling equipment, storage systems, and goods flow management. Offers forklifts, racking, services, and consulting for warehouse logistics needs. |
909 | |||
| 14 |
Emotorsemotors.com
Design and manufacturing of electric machines for on-road vehicles, providing solutions for propulsion and power generation in the automotive industry. |
811 | |||
| 15 |
Carmatcarmatsa.com
Designs, manufactures, and markets the Aeson artificial heart, a physiological and self-regulated device for end-stage biventricular heart failure patients awaiting transplant. |
760 | |||
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 |
ENVEA Globalenvea.global
Provides advanced certified air quality and emissions monitoring solutions to help industries meet environmental targets and move towards net zero. Prevent harmful environmental pollution. |
738 | |||
| 17 |
Schindler Franceschindler.fr
Design, manufacture, install, maintain, and modernize elevators, escalators, moving walkways, and building mobility management products worldwide. |
719 | |||
| 18 |
DIAM Group · Retail & Merch Solutionsdiaminter.com
Providing end-to-end retail and merchandising services including design, production, installation, and after-sales support with global presence and sustainability focus. |
688 | |||
| 19 |
Eiffage Métaleiffagemetal.com
Specializing in turnkey metal construction, Eiffage Métal designs and builds building envelopes, facades, and complex multi-technical projects, with a focus on industrial and wind energy sectors |
607 | |||
| 20 |
Fichet Groupfichetgroup.fr
Fichet Group offers creative and expert security solutions for businesses, banks, public administrations, retail, and homes, addressing evolving physical and cyber risks for a safer world. |
438 | |||
| 21 |
Ineo Defense
Provides technological solutions and services for defense and security, covering critical communications, electronic warfare, operational system protection, and site surveillance. |
355 | |||
| 22 |
STAR MARKETstarmarket.com
A food production company based in Maurepas, France, creating various food products for consumers. |
328 | |||
| 23 |
ETANCO Groupetancogroup.com
Providing a wide range of fixing and fastening solutions for building envelopes, including waterproofing, roofing, cladding, and facades. |
289 | |||
| 24 |
Nissan West Europe – Francenissan.fr
Design and manufacture innovative vehicles including crossovers and electric cars, focusing on accessible technology and customer-centric solutions. |
252 | |||
| 25 |
3D PLUS3d-plus.com
Development and manufacturing of miniaturized electronic modules for space applications, including memory, power, cameras, and custom SiP solutions. |
220 | |||
| 26 |
HellermannTyton Francehellermanntyton.fr
Provides cable fixation, identification, protection, and installation solutions for automotive, aerospace, medical, and renewable energy industries with global production sites. |
207 | |||
| 27 | 199 | ||||
| 28 |
Pyroalliancepyroalliance.ariane.group
manufacture advanced pyrotechnic and mechanical equipment for aerospace, defense, and energy industries, ensuring high performance and reliability |
166 | |||
| 29 |
SEDERMAcrodabeauty.com
A global leader in cosmetic active ingredients, offering a unique range for skincare and haircare products with proven efficacy for various benefits |
138 | |||
| 30 |
MCLmicrocable.fr
Specializing in cabling, IT equipment, mobility, and home automation, this French company distributes its own branded products and offers installation services to clients |
133 | |||
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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 Yvelines department
- The largest companies in the Yvelines department 1,469
- Multinational companies in the Yvelines department 226
- Companies with in-house R&D in the Yvelines department 160
- IT services companies in the Yvelines department 121
- IT Services and IT Consulting companies in the Yvelines department 118
- Professional services firms in the Yvelines department 108
- Hardware manufacturers in the Yvelines department 106
- Distributors and wholesalers in the Yvelines department 91
- Retail chains in the Yvelines department 89
- Consulting firms in the Yvelines department 72
- Aerospace and defence companies in the Yvelines department 65
- Public sector organisations in the Yvelines department 65
- Software Development companies in the Yvelines department 56
- Business Consulting and Services companies in the Yvelines department 53
- Government Administration companies in the Yvelines department 51
- Construction companies in the Yvelines department 50
- Automotive manufacturers and suppliers in the Yvelines department 49
- Motor Vehicle Manufacturing companies in the Yvelines department 49
- SaaS companies in the Yvelines department 49
- Education providers in the Yvelines department 46
- Industrial Machinery Manufacturing companies in the Yvelines department 43
- Critical infrastructure operators in the Yvelines department 41
- Family-owned companies in the Yvelines department 36
- Environmental services companies in the Yvelines department 35
The same list elsewhere in France
- Manufacturers in France 6,697
- Manufacturers in Île-de-France 1,515
- Manufacturers in Auvergne-Rhône-Alpes 1,216
- Manufacturers in Grand Est 573
- Manufacturers in Nouvelle-Aquitaine 498
- Manufacturers in Pays de la Loire 484
- Manufacturers in Occitanie 433
- Manufacturers in Provence-Alpes-Côte d'Azur 394
- Manufacturers in Hauts-de-France 369
- Manufacturers in the Rhône department 322
- Manufacturers in Brittany 307
- Manufacturers in the Hauts-de-Seine department 285
- Manufacturers in Bourgogne-Franche-Comté 272
- Manufacturers in Normandy 245
- Manufacturers in Centre-Val de Loire 207
- Manufacturers in the Nord department 204
- Manufacturers in the Bouches-du-Rhône department 187
- Manufacturers in the Isère department 178
- Manufacturers in the Haute-Garonne department 159
- Manufacturers in the Gironde department 137
- Manufacturers in the Essonne department 127
- Manufacturers in the Loire-Atlantique department 125
- Manufacturers in the Loire department 122
- Manufacturers in Paris 546