These companies with in-house R&D in Val-d'Oise are primarily mid-sized to large firms, with a strong presence in IT services, industrial machinery, and medical equipment manufacturing. Eviden, with over 10,000 employees, specializes in digital transformation. VYGON designs and manufactures single-use medical products, while Worldgrid focuses on smart energy solutions. SERIMAX is a global leader in pipeline welding solutions.
A notable pattern is the concentration of headquarters in specific towns like Bezons, Gonesse, and Roissy-en-France, indicating regional clusters of R&D activity. The founding dates span from the mid-19th century with JRI, which develops temperature monitoring solutions, to more recent establishments like CY Tech, founded in 2020.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Evideneviden.com
Eviden is a global leader in digital transformation, offering expertise in digital, cloud, data, advanced computing, and security solutions to industries worldwide |
10,793 | |||
| 2 |
JJA SAgroupe-jja.com
Family-owned brand manufacturer in home goods, offering a large product range across decoration, utilities, outdoor, and tableware with strong brands. |
1,362 | |||
| 3 | 1,213 | ||||
| 4 | 970 | ||||
| 5 | 860 | ||||
| 6 |
SERIMAXserimax.com
Global leader in pipeline welding solutions, offering high quality automatic and manual welding services on land and sea, in tough conditions Specializes in innovative equipment |
748 | |||
| 7 |
Portalpportalp.com
Designs, develops, and distributes automatic opening systems, from hydraulic operators to intelligent, high-tech automatic doors, with a global commercial network. |
713 | |||
| 8 |
Baltbaltgroup.com
Leading developer neurovascular solutions for ischemic and hemorrhagic stroke, and peripheral embolization, collaborating with physicians, expanding global medical device portfolio. |
612 | |||
| 9 |
CERBAlab-cerba.com
European leader in specialized clinical pathology, offering a wide range of tests to private and hospital labs in over 50 countries Partnering for innovation and research |
561 | |||
| 10 |
CY Techcytech.cyu.fr
CY Tech is a leading institution in Sciences, Engineering, Economics, and Management with multiple campuses, formed from the merger of EISTI and UCP |
368 | |||
| 11 |
BERNARD CONTROLSbernardcontrols.com
World leader in electric actuation, specialized in Nuclear, Power Generation, Water, Industries, Oil & Gas markets, with a strong international network. |
336 | |||
| 12 |
JRIjri-mms.com
Develops temperature monitoring solutions for thermo-sensitive products in healthcare, food, and industry, utilizing IoT technology and offering metrology services. |
298 | |||
| 13 | 266 | ||||
| 14 |
POMMIERpommier.eu
A leading specialist in industrial vehicle bodywork equipment, offering a wide range of products designed and manufactured in-house since 1945 |
250 | |||
| 15 |
NOVÉAL-L'Oréal Groupenoveal.com
Develops and guarantees exclusive, high-performance ingredients for global beauty consumers, utilizing sustainable chemistry, biotechnologies, and innovative green technologies for responsible and sustainable beauty. |
250 | |||
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| 16 |
Ecole nationale supérieure de l'Electronique et de ses Applicationsensea.fr
This company offers high-quality engineering education with a focus on expertise, inclusivity, and sustainability, fostering innovation and responsible professionals in a supportive environment |
249 | |||
| 17 |
Laroche Grouplaroche-group.com
Offers complex machining, production engineering, and aerostructures assembly, supporting European industry leaders in major projects across aeronautics, space, automotive, telecoms, and rail. |
240 | |||
| 18 |
Sto Francesto.fr
Development of innovative products and systems for facade renovation and cladding, focusing on responsible building and aesthetic preservation. |
236 | |||
| 19 |
PXP™ - PROJECT X PARIS™projectxparis.com
premium streetwear brand offering durable, high-quality fashion for all genders, collaborating with artists, and expanding omnichannel retail presence. |
227 | |||
| 20 | 184 | ||||
| 21 | 183 | ||||
| 22 |
CAME Francecame.com
Development and supply of integrated automation systems for residential, public, and urban environments including access control, security, and parking management. |
173 | |||
| 23 |
CURVERcurver.com
European market leader in plastic household products, focusing on design and innovation to create user-friendly and fun solutions for home and leisure |
165 | |||
| 24 |
Yon-Ka Parisyonka.fr
Development and provision of natural, effective phyto-aromatic skincare treatments and products promoting holistic beauty and emotional harmony. |
156 | |||
| 25 |
PREVORprevor.com
Maximizing safety for individuals exposed to chemical burns and risks through research, solutions, and training in prevention and first aid equipment development. |
151 | |||
| 26 |
URMET FRANCEurmet.fr
Provides reliable intercom, access control, video surveillance, and home automation solutions with technical support, training, and extensive distribution network. |
143 | |||
| 27 |
VYGON Francevygon.com
Design, production, and distribution of high-tech single-use medical devices supporting healthcare professionals for patient safety and care quality. |
140 | |||
| 28 |
Filpackfilpack.fr
French leader providing protection, packaging, and conditioning equipment for agriculture, food industry, and industrial logistics with engineering services. |
118 | |||
| 29 | 118 | ||||
| 30 | 113 | ||||
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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 12, 2026.
More company lists in the Val-d'Oise department
- The largest companies in the Val-d'Oise department 849
- Multinational companies in the Val-d'Oise department 128
- Manufacturers in the Val-d'Oise department 85
- Hardware manufacturers in the Val-d'Oise department 70
- Distributors and wholesalers in the Val-d'Oise department 67
- Retail chains in the Val-d'Oise department 56
- Professional services firms in the Val-d'Oise department 44
- Family-owned companies in the Val-d'Oise department 42
- IT services companies in the Val-d'Oise department 42
- IT Services and IT Consulting companies in the Val-d'Oise department 38
- Transportation, Logistics, Supply Chain and Storage companies in the Val-d'Oise department 33
- Aerospace and defence companies in the Val-d'Oise department 31
- Public sector organisations in the Val-d'Oise department 30
- Construction companies in the Val-d'Oise department 29
- Wholesale companies in the Val-d'Oise department 29
- Healthcare providers in the Val-d'Oise department 27
- Industrial Machinery Manufacturing companies in the Val-d'Oise department 27
- Government Administration companies in the Val-d'Oise department 26
- Logistics companies in the Val-d'Oise department 25
The same list elsewhere in France
- Companies with in-house R&D in France 8,749
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- Companies with in-house R&D in Pays de la Loire 480
- Companies with in-house R&D in Hauts-de-France 410
- Companies with in-house R&D in Brittany 366
- Companies with in-house R&D in the Haute-Garonne department 323
- Companies with in-house R&D in the Bouches-du-Rhône department 320
- Companies with in-house R&D in the Isère department 304
- Companies with in-house R&D in Bourgogne-Franche-Comté 261
- Companies with in-house R&D in the Nord department 237
- Companies with in-house R&D in Normandy 227
- Companies with in-house R&D in the Gironde department 225
- Companies with in-house R&D in the Loire-Atlantique department 207
- Companies with in-house R&D in the Essonne department 198
- Companies with in-house R&D in Centre-Val de Loire 195
- Companies with in-house R&D in Paris 1,249
- Companies with in-house R&D in Lyon 192