# Top 26 electronics and semiconductor companies in the Yvelines department

Tamtam tracks 26 electronics and semiconductor companies headquartered in the Yvelines department. This list ranks all of them by number of employees on LinkedIn, led by LGM, SOURIAU-SUNBANK Connection Technologies by Eaton and 3D PLUS. Their median headcount is 26. Half of them were founded in 2002 or later. The most common headquarters are Velizy-Villacoublay (4), Saint-Germain-en-Laye (2) and Trappes (2).

The Yvelines department is home to a concentration of electronics and semiconductor companies, ranging from mid-sized firms to smaller, specialized entities. These companies are primarily involved in engineering services, manufacturing of electronic components, and advanced technology development.

Key players include LGM, which provides technological and software engineering consulting, and SOURIAU-SUNBANK Connection Technologies by Eaton, an intelligent power management company. 3D PLUS specializes in miniaturized electronic modules for space applications, while SiPearl designs energy-efficient CPUs for supercomputers. Médiane Système focuses on secure real-time operating systems, and LGM Ingénierie offers expertise in embedded electronics. Notably, several companies like LGM, LGM Ingénierie, and TP-Link France are located in Vélizy-Villacoublay, indicating a geographical cluster within the department.

🇫🇷 Yvelines · 26 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [LGM](https://www.tamtam.ai/c/lgm-velizy-villacoublay) (lgm.group)<br>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 |
| 2 | [SOURIAU-SUNBANK Connection Technologies by Eaton](https://www.tamtam.ai/c/souriau-sunbank-connection-technologies-by-eaton) (souriau.com)<br>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 |  |
| 3 | [3D PLUS](https://www.tamtam.ai/c/3d-plus) (3d-plus.com)<br>Development and manufacturing of miniaturized electronic modules for space applications, including memory, power, cameras, and custom SiP solutions. | Space Research and Technology | 🇫🇷 Buc | 220 | 1995 |
| 4 | [Médiane Système](https://www.tamtam.ai/c/mediane-systeme) (medianesysteme.com)<br>Specializes in custom secure real-time operating systems, private 5G networks, embedded AI, cybersecurity, and industrial network solutions. | Software Development | 🇫🇷 Le Pecq | 213 | 1989 |
| 5 | [SiPearl](https://www.tamtam.ai/c/sipearl) (sipearl.com)<br>Designs energy-efficient CPUs for supercomputers, AI, and data centers. These CPUs address security, defense, medical, energy, and climate challenges with reduced environmental impact. | Semiconductor Manufacturing | 🇫🇷 Maisons-Laffitte | 160 | 2019 |
| 6 | [LGM Ingénierie](https://www.tamtam.ai/c/lgm-ingenierie) (lgm.group)<br>Experts in embedded electronics, test equipment, and embedded networks for major industrial players in aeronautics, defense, rail, and automotive sectors. | Engineering Services | 🇫🇷 Velizy-Villacoublay | 135 | 2007 |
| 7 | [SBG Systems](https://www.tamtam.ai/c/sbg-systems) (sbg-systems.com)<br>Manufactures inertial measurement systems from miniature to high accuracy. Products are ideal for industrial, defense, and research projects, including unmanned vehicle guidance and surveying. | Computers and Electronics Manufacturing | 🇫🇷 Carrières-sur-Seine | 124 | 2007 |
| 8 | [Groupe Genaris](https://www.tamtam.ai/c/groupe-genaris) (genaris.fr)<br>Specializes in electrical and electronic design, prototyping, and manufacturing with integrated product development for defense, mobility, and industry sectors. | Engineering Services | 🇫🇷 Guyancourt | 71 |  |
| 9 | [Macnica ATD Europe](https://www.tamtam.ai/c/macnica-atd-europe) (macnica.com)<br>European subsidiary specializing in semiconductor distribution, machine vision components, imaging solutions, and AI technology support throughout product development. | Semiconductor Manufacturing | 🇫🇷 Chatou | 57 |  |
| 10 | [TP-Link France](https://www.tamtam.ai/c/tp-link-france) (tp-link.com)<br>Provides reliable and innovative network equipment for professionals, including VPN, Multi-WAN, 4G, and VDSL networks, consistently ranking as a global leader in WiFi devices. | Computer Networking Products | 🇫🇷 Velizy-Villacoublay | 43 | 1996 |
| 11 | [NCS SYSTEMS France](https://www.tamtam.ai/c/ncs-systems-france) (ncs-systems.eu)<br>Customized technology solutions and services tailored to Transport, Aerospace, Defense, Medical, Broadcast, and Industrial sector requirements. | IT Services and IT Consulting | 🇫🇷 Élancourt | 34 |  |
| 12 | [VDO France](https://www.tamtam.ai/c/vdo-france) (continental.com)<br>Provides electronic solutions and original equipment for special vehicles, alongside products and services for tachograph centers and fleet managers, in Rambouillet, France. | Motor Vehicle Parts Manufacturing | 🇫🇷 Rambouillet | 30 | 2007 |
| 13 | [ARTHESE](https://www.tamtam.ai/c/arthese) (arthese.fr)<br>French company specializing in custom electronic circuit design and manufacturing, offering tailored solutions and long-term partnerships with innovative technology. | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Épône | 26 | 1985 |
| 14 | [DOLIAM](https://www.tamtam.ai/c/doliam) (doliam.fr)<br>Private holding company managing high-tech subsidiaries specializing in medical devices, security electronics, asset protection, energy solutions, and advanced electronic design and production services. | Medical Equipment Manufacturing | 🇫🇷 Maisons-Laffitte | 23 | 1991 |
| 15 | [Isentroniq](https://www.tamtam.ai/c/isentroniq) (isentroniq.com)<br>Development of advanced wiring solutions to support scalable solid-state quantum computers, enabling practical quantum computing applications. | Computer Hardware Manufacturing | 🇫🇷 Saint-Germain-en-Laye | 16 | 2025 |
| 16 | [A2R ELECTRONIQUE](https://www.tamtam.ai/c/a2r-electronique) (a2r-electronique.fr)<br>Designing and manufacturing mechanical and electronic systems like test benches and harnesses; expert in electronic equipment wiring for military and aeronautics. | Defense and Space Manufacturing | 🇫🇷 Trappes | 16 | 1999 |
| 17 | [BNBXTECH](https://www.tamtam.ai/c/bnbxtech) (bnbxtech.com)<br>A team of professionals dedicated to aiding businesses and startups in developing innovative software and hardware solutions, collaborating closely with clients to achieve their goals | Computers and Electronics Manufacturing | 🇫🇷 La Verrière | 11 | 2018 |
| 18 | [EUROMIP](https://www.tamtam.ai/c/euromip) (euromip.com)<br>Provides electronic components and co-development expertise to aerospace, aeronautical, and defense industries, ensuring innovation and reliability for extreme applications. | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Velizy-Villacoublay | 10 | 1990 |
| 19 | [FIAMM France](https://www.tamtam.ai/c/fiamm-france) (fiammantenna.fr)<br>Technology actor in connectivity systems for the global automotive market, specializing in RF engineering, antennas, and advanced electronics for optimal reception. | Motor Vehicle Manufacturing | 🇫🇷 Aubergenville | 8 | 1938 |
| 20 | [Mesurex](https://www.tamtam.ai/c/mesurex) (mesurex.fr)<br>French sensor manufacturer with over 50 years of experience providing professional solutions for various sectors, including aeronautics, automotive, and manufacturing | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Saint-Arnoult-en-Yvelines | 6 | 1972 |
| 21 | [Thorlabs France](https://www.tamtam.ai/c/thorlabs-france) (thorlabs.com)<br>A global leader in manufacturing and distributing components for optics, photonics, and laser applications, as well as advanced microscopy and imaging systems | Research Services | 🇫🇷 Maisons-Laffitte | 6 | 2008 |
| 22 | [Ermatel Electronique](https://www.tamtam.ai/c/ermatel-electronique) (ermatel.fr)<br>Offers comprehensive support for complex projects, focused on the design and realization of electronic functions for various applications. | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Trappes | 6 | 2002 |
| 23 | [Exail - Maritime & Industry](https://www.tamtam.ai/c/exail-maritime-and-industry) (exail.com)<br>Specializes in advanced robotics, maritime navigation, aerospace, and photonics technologies delivering reliable, safe solutions for civil and defense sectors worldwide. | Defense and Space Manufacturing | 🇫🇷 Saint-Germain-en-Laye | 5 | 1998 |
| 24 | [NANOSENSE](https://www.tamtam.ai/c/nanosense) (nano-sense.com)<br>NanoSense is a French SME specializing in Indoor Air Quality since 2002 They design and produce multi-sensor probes for CO2, VOCs, temperature, humidity, radon, and particles | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Achères | 5 | 2002 |
| 25 | [AVENTYS ELECTRONICS](https://www.tamtam.ai/c/aventys-electronics) (aventys-electronics.com)<br>Designs and develops electronic solutions for energy, access control, fire safety, and physical measurement sectors across France. | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Thiverval-Grignon | 3 | 2018 |
| 26 | [SDR-Technologies SAS](https://www.tamtam.ai/c/sdr-technologies-sas) (sdrtechnologies.fr)<br>A company founded in 2016 develops tools for spectrum management and RF data processing using GPU processors and SDR receivers for various applications | Telecommunications | 🇫🇷 Croissy-sur-Seine | 2 | 2016 |

## 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)
- [Multinational companies in the Yvelines department](https://www.tamtam.ai/l/multinational-companies-yvelines) (226)
- [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)

## The same list elsewhere in France

- [Electronics and semiconductor companies in France](https://www.tamtam.ai/l/electronics-companies-france) (846)
- [Electronics and semiconductor companies in Île-de-France](https://www.tamtam.ai/l/electronics-companies-ile-de-france) (230)
- [Electronics and semiconductor companies in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/electronics-companies-auvergne-rhone-alpes) (154)
- [Electronics and semiconductor companies in Occitanie](https://www.tamtam.ai/l/electronics-companies-occitanie) (89)
- [Electronics and semiconductor companies in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/electronics-companies-provence-alpes-cote-dazur) (79)
- [Electronics and semiconductor companies in the Isère department](https://www.tamtam.ai/l/electronics-companies-isere) (70)
- [Electronics and semiconductor companies in Grand Est](https://www.tamtam.ai/l/electronics-companies-grand-est) (56)
- [Electronics and semiconductor companies in Nouvelle-Aquitaine](https://www.tamtam.ai/l/electronics-companies-nouvelle-aquitaine) (53)
- [Electronics and semiconductor companies in the Haute-Garonne department](https://www.tamtam.ai/l/electronics-companies-haute-garonne) (49)
- [Electronics and semiconductor companies in the Bouches-du-Rhône department](https://www.tamtam.ai/l/electronics-companies-bouches-du-rhone) (45)
- [Electronics and semiconductor companies in the Essonne department](https://www.tamtam.ai/l/electronics-companies-essonne) (44)
- [Electronics and semiconductor companies in Brittany](https://www.tamtam.ai/l/electronics-companies-brittany) (38)
- [Electronics and semiconductor companies in Pays de la Loire](https://www.tamtam.ai/l/electronics-companies-pays-de-la-loire) (38)
- [Electronics and semiconductor companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/electronics-companies-hauts-de-seine) (35)
- [Electronics and semiconductor companies in the Gironde department](https://www.tamtam.ai/l/electronics-companies-gironde) (32)
- [Electronics and semiconductor companies in Hauts-de-France](https://www.tamtam.ai/l/electronics-companies-hauts-de-france) (27)
- [Electronics and semiconductor companies in the Rhône department](https://www.tamtam.ai/l/electronics-companies-rhone) (25)
- [Electronics and semiconductor companies in Paris](https://www.tamtam.ai/l/electronics-companies-paris) (54)
- [Electronics and semiconductor companies in Grenoble](https://www.tamtam.ai/l/electronics-companies-grenoble) (28)

---

Source: https://www.tamtam.ai/l/electronics-companies-yvelines