# Multinational companies headquartered in the Yvelines department Tamtam tracks 226 multinational companies headquartered in the Yvelines department. This list ranks the 30 largest by number of employees on LinkedIn, led by Dassault Systèmes, Groupe PSA and Eiffage Énergie Systèmes. Their median headcount is 1,726. The most common headquarters are Velizy-Villacoublay (12), Versailles (8) and Poissy (3). These multinational companies in the Yvelines department are primarily large groups, with a strong presence in motor vehicle manufacturing, construction, and environmental services. Notable companies include Dassault Systèmes, pioneering virtual worlds; Groupe PSA, a leading automaker; Eiffage Énergie Systèmes, designing energy systems; and Peugeot, offering quality driving experiences. The data shows a significant concentration of headquarters in Velizy-Villacoublay, indicating a central hub for these larger enterprises within the department. The companies listed exhibit a mix of sectors, from the long-established automotive industry with Peugeot, founded in 1810, to more recent entities in higher education and retail. The presence of multiple Eiffage entities (Eiffage Énergie Systèmes, Eiffage, Eiffage Construction, Eiffage Génie Civil) also highlights the substantial footprint of this construction group in the region. 🇫🇷 Yvelines · 30 companies · Updated Nov 11, 2026 | # | Company | Industry | Headquarters | Employees | Founded | |---|---|---|---|---|---| | 1 | [Dassault Systèmes](https://www.tamtam.ai/c/dassault-systemes) (3ds.com)
Pioneering virtual worlds since 1981, this company offers a platform enabling customers across industries to collaborate, imagine, and create sustainable innovations for real-life impact. | Software Development | 🇫🇷 Velizy-Villacoublay | 27,414 | | | 2 | [Groupe PSA](https://www.tamtam.ai/c/groupe-psa) (groupe-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. | Motor Vehicle Manufacturing | 🇫🇷 Velizy-Villacoublay | 16,153 | | | 3 | [Eiffage Énergie Systèmes](https://www.tamtam.ai/c/eiffage-energie-systemes) (eiffageenergiesystemes.com)
Designs, builds, operates, and maintains energy systems, offering innovative solutions in electrical, industrial, climatic, and energy engineering. | Environmental Services | 🇫🇷 Velizy-Villacoublay | 15,518 | | | 4 | [Peugeot](https://www.tamtam.ai/c/peugeot) (peugeot.com)
Offers customers exhilarating, quality driving experiences through racy design and uncompromised quality, adding excitement to every journey. | Motor Vehicle Manufacturing | 🇫🇷 Poissy | 9,490 | 1810 | | 5 | [SAVENCIA](https://www.tamtam.ai/c/savencia) (savencia.com)
Family-owned food group valorizing milk and cocoa sectors for high-quality products, strong brands, meeting consumer expectations and supporting culinary professionals worldwide. | Food and Beverage Manufacturing | 🇫🇷 Viroflay | 9,109 | | | 6 | [Eiffage](https://www.tamtam.ai/c/eiffage) (eiffage.com)
Join a close-knit company valuing teamwork, innovation, and individuality to build a human-sized future, welcoming diverse talents to thrive | Construction | 🇫🇷 Velizy-Villacoublay | 7,684 | | | 7 | [SOCOTEC](https://www.tamtam.ai/c/socotec) (socotec.fr)
Provides services throughout the entire life cycle of built assets for compliance, extended lifespan, improved performance, and people’s safety in construction, infrastructure, and industry. | Environmental Services | 🇫🇷 Guyancourt | 7,326 | 1953 | | 8 | [ArianeGroup](https://www.tamtam.ai/c/arianegroup) (ariane.group)
Designing, developing, manufacturing, and operating space launch systems and strategic missiles for space and defense sectors. | Aviation and Aerospace Component Manufacturing | 🇫🇷 Les Mureaux | 6,651 | | | 9 | [Eiffage Construction](https://www.tamtam.ai/c/eiffage-construction) (eiffageconstruction.com)
A leading European construction company specializing in development, real estate, construction, maintenance, and service works with a strong corporate culture | Construction | 🇫🇷 Velizy-Villacoublay | 5,174 | | | 10 | [Eiffage Génie Civil](https://www.tamtam.ai/c/eiffage-genie-civil) (eiffagegeniecivil.com)
Specializing in civil engineering, this company designs, builds, maintains, and demolishes ambitious structures in France and internationally with a human perspective | Civil Engineering | 🇫🇷 Velizy-Villacoublay | 3,786 | | | 11 | [KNDS France](https://www.tamtam.ai/c/knds-france) (knds.com)
Designing, developing, producing armored vehicles, artillery, guns, turrets, ammunition, and robotic systems, with customer support, for armed forces land combat challenges. | Defense and Space Manufacturing | 🇫🇷 Versailles | 2,894 | | | 12 | [Novares Group](https://www.tamtam.ai/c/novares-group) (novaresteam.com)
Designs, manufactures complex plastic components and systems for the automotive industry, focusing on greener, lighter, and connected cars with intuitive interfaces. | Motor Vehicle Manufacturing | 🇫🇷 Velizy-Villacoublay | 2,833 | 1955 | | 13 | [HEC Paris](https://www.tamtam.ai/c/hec-paris) (hec.edu)
Offers diverse management education programs including Masters, MBA, PhD, and Executive Education for future leaders and current executives, with focus on education and research. | Higher Education | 🇫🇷 Jouy-en-Josas | 2,765 | | | 14 | [UVSQ Université de Versailles Saint-Quentin-en-Yvelines](https://www.tamtam.ai/c/uvsq-universite-de-versailles-saint-quentin-en-yvelines) (uvsq.fr)
Provides diverse higher education, conducts innovative research across various fields, and fosters technological advancements with strong industry and international partnerships. | Research Services | 🇫🇷 Versailles | 2,170 | 1991 | | 15 | [Bureau Vallée](https://www.tamtam.ai/c/bureau-vallee) (bureau-vallee.fr)
French retailer selling discounted stationery, office, tech, and furniture products to individuals and professionals across 240 stores and online. | Retail | 🇫🇷 Les Clayes-sous-Bois | 1,726 | 1990 | | 16 | [Safran Landing Systems](https://www.tamtam.ai/c/safran-landing-systems) (safran-group.com)
Specializes in landing gear systems, providing innovative solutions for aircraft safety, performance, and maintenance in both commercial and military sectors. | Aviation and Aerospace Component Manufacturing | 🇫🇷 Velizy-Villacoublay | 1,717 | | | 17 | [Groupe Léon Grosse](https://www.tamtam.ai/c/groupe-leon-grosse) (leongrosse.fr)
Specializes in large-scale construction and renovation projects including stadiums, transportation hubs, cultural sites, and sports facilities across France. | Construction | 🇫🇷 Versailles | 1,517 | 1881 | | 18 | [LGM](https://www.tamtam.ai/c/lgm-velizy-villacoublay) (lgm.group)
The company offers technological, digital, and software engineering consulting, innovative solution design, and complex electronics production, supporting critical systems and industrial performance. | Engineering Services | 🇫🇷 Velizy-Villacoublay | 1,469 | 1991 | | 19 | [Leasys](https://www.tamtam.ai/c/leasys) (leasys.com)
Offers long-term rental solutions and company fleet management systems across Europe for efficient, rational, safe, and sustainable mobility for businesses and individuals. | Financial Services | 🇫🇷 Poissy | 1,440 | | | 20 | [ERA IMMOBILIER France](https://www.tamtam.ai/c/era-immobilier-france) (eraimmobilier.com)
Established in 1971, this real estate franchise network is a leader in Europe with over 1,150 franchise locations in 39 countries, fostering a Gagnant / Gagnant (Win/Win) spirit | Real Estate | 🇫🇷 Versailles | 1,258 | 1971 | | 21 | [Konica Minolta Business Solutions France](https://www.tamtam.ai/c/konica-minolta-business-solutions-france) (konicaminolta.fr)
Providing digital transformation solutions including imaging, cloud storage, IT services, and healthcare solutions Specializing in printing, AI technology, and eco-friendly initiatives | IT Services and IT Consulting | 🇫🇷 Carrières-sur-Seine | 1,148 | 1873 | | 22 | [Nature et Découvertes](https://www.tamtam.ai/c/nature-et-decouvertes) (natureetdecouvertes.com)
Offers products for well-being, outdoor, home, games, and books. Provides concrete solutions for sustainable lifestyles, committed to living. A meaningful gift brand. | Retail | 🇫🇷 Versailles | 1,032 | 1990 | | 23 | [SOURIAU-SUNBANK Connection Technologies by Eaton](https://www.tamtam.ai/c/souriau-sunbank-connection-technologies-by-eaton) (souriau.com)
An intelligent power management company focused on improving quality of life, protecting the environment, and helping customers manage power efficiently | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Versailles | 965 | | | 24 | [Eiffage Rail](https://www.tamtam.ai/c/eiffage-rail) (eiffagerail.com)
Specializes in rail infrastructure construction, maintenance, and modernization, providing comprehensive solutions for railway networks and urban transit systems. | Rail Transportation | 🇫🇷 Velizy-Villacoublay | 938 | | | 25 | [Jungheinrich France SAS](https://www.tamtam.ai/c/jungheinrich-france-sas) (jungheinrich.fr)
International leader in handling equipment, storage systems, and goods flow management. Offers forklifts, racking, services, and consulting for warehouse logistics needs. | Machinery Manufacturing | 🇫🇷 Velizy-Villacoublay | 909 | | | 26 | [CULLIGAN FRANCE](https://www.tamtam.ai/c/culligan-france) (culligan.fr)
Specialist in water treatment providing softeners, purifiers, and water fountains for homes, businesses, and communities ensuring quality water. | Consumer Services | 🇫🇷 Versailles | 862 | | | 27 | [Service d’infrastructure de la Défense](https://www.tamtam.ai/c/service-d-infrastructure-de-la-defense) (defense.gouv.fr)
Manages, builds, and maintains the French Ministry of Armed Forces' real estate, ensuring infrastructure support and energy control for military operations domestically and abroad. | Construction | 🇫🇷 Versailles | 850 | 2005 | | 28 | [Stellantis &You, Sales and Services](https://www.tamtam.ai/c/stellantis-and-you-sales-and-services) (stellantisandyou.com)
Providing sales and customer services support, focusing on enhancing client experience and facilitating vehicle-related transactions and assistance. | Retail Motor Vehicles | 🇫🇷 Poissy | 838 | 2021 | | 29 | [Clemessy Services](https://www.tamtam.ai/c/clemessy-services) (clemessy.com)
A leading French provider of industrial services, offering maintenance, engineering, and construction solutions for various industries worldwide | Industrial Machinery Manufacturing | 🇫🇷 Velizy-Villacoublay | 778 | | | 30 | [IVALIS Group](https://www.tamtam.ai/c/ivalis-group) (ivalisgroup.com)
Offers outsourced stocktaking, supply-chain audits, RFID solutions, product identification, geolocation services, and electronic shelf label installations for retail and supply-chain industries internationally. | Retail | 🇫🇷 Montigny-le-Bretonneux | 775 | | ## 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](https://www.tamtam.ai/l/largest-companies-yvelines) (1,469) - [Companies with in-house R&D in the Yvelines department](https://www.tamtam.ai/l/r-and-d-companies-yvelines) (160) - [IT services companies in the Yvelines department](https://www.tamtam.ai/l/it-services-companies-yvelines) (121) - [IT Services and IT Consulting companies in the Yvelines department](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-yvelines) (118) - [Manufacturers in the Yvelines department](https://www.tamtam.ai/l/manufacturers-yvelines) (109) - [Professional services firms in the Yvelines department](https://www.tamtam.ai/l/professional-services-firms-yvelines) (108) - [Hardware manufacturers in the Yvelines department](https://www.tamtam.ai/l/hardware-companies-yvelines) (106) - [Distributors and wholesalers in the Yvelines department](https://www.tamtam.ai/l/distributors-and-wholesalers-yvelines) (91) - [Retail chains in the Yvelines department](https://www.tamtam.ai/l/retail-chains-yvelines) (89) - [Consulting firms in the Yvelines department](https://www.tamtam.ai/l/consulting-firms-yvelines) (72) - [Aerospace and defence companies in the Yvelines department](https://www.tamtam.ai/l/aerospace-and-defense-companies-yvelines) (65) - [Public sector organisations in the Yvelines department](https://www.tamtam.ai/l/public-sector-organisations-yvelines) (65) - [Software Development companies in the Yvelines department](https://www.tamtam.ai/l/software-development-companies-yvelines) (56) - [Business Consulting and Services companies in the Yvelines department](https://www.tamtam.ai/l/business-consulting-and-services-companies-yvelines) (53) - [Government Administration companies in the Yvelines department](https://www.tamtam.ai/l/government-administration-companies-yvelines) (51) - [Construction companies in the Yvelines department](https://www.tamtam.ai/l/construction-companies-yvelines) (50) - [Automotive manufacturers and suppliers in the Yvelines department](https://www.tamtam.ai/l/automotive-companies-yvelines) (49) - [Motor Vehicle Manufacturing companies in the Yvelines department](https://www.tamtam.ai/l/motor-vehicle-manufacturing-companies-yvelines) (49) - [SaaS companies in the Yvelines department](https://www.tamtam.ai/l/saas-companies-yvelines) (49) - [Education providers in the Yvelines department](https://www.tamtam.ai/l/education-companies-yvelines) (46) - [Industrial Machinery Manufacturing companies in the Yvelines department](https://www.tamtam.ai/l/industrial-machinery-manufacturing-companies-yvelines) (43) - [Critical infrastructure operators in the Yvelines department](https://www.tamtam.ai/l/critical-infrastructure-operators-yvelines) (41) - [Family-owned companies in the Yvelines department](https://www.tamtam.ai/l/family-owned-companies-yvelines) (36) - [Environmental services companies in the Yvelines department](https://www.tamtam.ai/l/environmental-services-companies-yvelines) (35) ## The same list elsewhere in France - [Multinational companies in France](https://www.tamtam.ai/l/multinational-companies-france) (11,864) - [Multinational companies in Île-de-France](https://www.tamtam.ai/l/multinational-companies-ile-de-france) (6,028) - [Multinational companies in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/multinational-companies-auvergne-rhone-alpes) (1,318) - [Multinational companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/multinational-companies-hauts-de-seine) (1,231) - [Multinational companies in Grand Est](https://www.tamtam.ai/l/multinational-companies-grand-est) (787) - [Multinational companies in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/multinational-companies-provence-alpes-cote-dazur) (638) - [Multinational companies in the Rhône department](https://www.tamtam.ai/l/multinational-companies-rhone) (577) - [Multinational companies in Occitanie](https://www.tamtam.ai/l/multinational-companies-occitanie) (532) - [Multinational companies in Hauts-de-France](https://www.tamtam.ai/l/multinational-companies-hauts-de-france) (511) - [Multinational companies in Nouvelle-Aquitaine](https://www.tamtam.ai/l/multinational-companies-nouvelle-aquitaine) (450) - [Multinational companies in Pays de la Loire](https://www.tamtam.ai/l/multinational-companies-pays-de-la-loire) (390) - [Multinational companies in the Bouches-du-Rhône department](https://www.tamtam.ai/l/multinational-companies-bouches-du-rhone) (351) - [Multinational companies in the Nord department](https://www.tamtam.ai/l/multinational-companies-nord) (332) - [Multinational companies in Brittany](https://www.tamtam.ai/l/multinational-companies-brittany) (264) - [Multinational companies in the Haute-Garonne department](https://www.tamtam.ai/l/multinational-companies-haute-garonne) (246) - [Multinational companies in Bourgogne-Franche-Comté](https://www.tamtam.ai/l/multinational-companies-bourgogne-franche-comte) (220) - [Multinational companies in Normandy](https://www.tamtam.ai/l/multinational-companies-normandy) (216) - [Multinational companies in the Gironde department](https://www.tamtam.ai/l/multinational-companies-gironde) (200) - [Multinational companies in the Val-de-Marne department](https://www.tamtam.ai/l/multinational-companies-val-de-marne) (200) - [Multinational companies in the Seine-Saint-Denis department](https://www.tamtam.ai/l/multinational-companies-seine-saint-denis) (198) - [Multinational companies in the Bas-Rhin department](https://www.tamtam.ai/l/multinational-companies-bas-rhin) (185) - [Multinational companies in Paris](https://www.tamtam.ai/l/multinational-companies-paris) (3,531) - [Multinational companies in Lyon](https://www.tamtam.ai/l/multinational-companies-lyon) (283) - [Multinational companies in Boulogne-Billancourt](https://www.tamtam.ai/l/multinational-companies-boulogne-billancourt) (188) --- Source: https://www.tamtam.ai/l/multinational-companies-yvelines