The companies in the Loiret department with in-house R&D are primarily large organizations, including public institutions and established manufacturing firms. Notable examples include the Université d'Orléans, a public university conducting research, BRGM, specializing in Earth Science applications, and CHU Orléans, a large university hospital. Other significant players are ALL Circuits, an EMS provider for electronics manufacturing, and Groupe LSDH, which processes and packages liquid foods.
Many of these companies, such as CILAS in defense and space manufacturing, and GUINAULT in aviation, are concentrated in Orléans. However, the presence of firms like ALL Circuits in Meung-sur-Loire and Groupe LSDH in Saint-Denis-de-l'Hôtel indicates a broader distribution of R&D activities across the department, encompassing diverse sectors from higher education and healthcare to specialized manufacturing and environmental services.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Université d'Orléansuniv-orleans.fr
Public university offering diverse academic programs and conducting research within the Orléans and Tours educational region in France. |
1,600 | |||
| 2 | 1,448 | ||||
| 3 |
CHU Orléanschu-orleans.fr
State-of-the-art university hospital located 1 hour south of Paris with 1,300 beds, modern facilities, and a staff of 5,323 professionals Located 10km from downtown Orléans |
1,368 | |||
| 4 |
ALL Circuitsallcircuits.com
Leading EMS provider specializing in automotive and industrial manufacturing, offering high-quality electronics design, industrialization, and manufacturing services globally with a strong focus on innovation and quality |
1,154 | |||
| 5 |
Groupe LSDHlsdh.fr
Processes and packages various liquid foods in cartons or bottles, and fresh salads, managing the entire supply chain from sourcing to delivery. |
864 | |||
| 6 |
Antea Group - Franceanteagroup.fr
Provides environmental engineering and consulting services globally, focusing on water, industrial environments, infrastructure, and environmental data management for diverse clients. |
808 | |||
| 7 |
Alstef Groupalstefgroup.com
Designs, integrates, and supports automated turnkey solutions for airports, intralogistics, and parcel markets, offering baggage handling and internal logistics flow management. |
727 | |||
| 8 |
LVMH RECHERCHElvmh.com
Creates exceptional makeup, skincare, and perfume products for LVMH luxury brands, focusing on performance, sensoriality, and environmental respect through advanced research and open innovation. |
398 | |||
| 9 | 292 | ||||
| 10 | 
CENTRE HOSPITALIER REGIONAL D'ORLEANS
A medical practice company in Orleans, France, providing healthcare services at a regional hospital |
290 | |||
| 11 |
DWSdws-engraving.com
Specializes in engraving machines for luxury brands, enabling personalized product customization across various materials and retail environments. |
233 | |||
| 12 |
REDEX Groupredex-group.com
European engineering group specializing in advanced solutions for high precision industries, focused on machine drives, strip processing technologies, and precision rolling mills, with a fully European-made product portfolio |
226 | |||
| 13 |
GUINAULTguinault.com
An international company based in France providing innovative solutions for the aviation industry, reducing environmental impact and operating costs for airlines worldwide |
185 | |||
| 14 |
DELPHARM ORLEANSdelpharm.com
Acquired by Delpharm in 2019, this site specializes in manufacturing liquid and solid pharmaceutical forms, including mouthwashes, syrups, tablets, and sachets |
158 | |||
| 15 |
NOVINTECnovintec.com
A manufacturer of components, modules, and sub-systems for Aerospace, Process Industries, Motorsport, Space programs, and Nuclear industries, focusing on continuous improvement and R&D |
113 | |||
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 |
VERGNETvergnet.com
Specializing in renewable energy solutions, they provide unique technologies for off-grid networks, controlling energy production and ensuring reliability in harsh environments worldwide |
109 | |||
| 17 |
CJScjs-plv.com
Design and production of customized industrial equipment and solutions to enhance merchandising and digital marketing effectiveness across various sectors. |
73 | |||
| 18 | 72 | ||||
| 19 |
INTEVA FRANCEintevaproducts.com
Designs, builds, manufactures, and assembles access control and door systems, electronic systems, and motors for the automotive industry worldwide. |
69 | |||
| 20 |
EDIVERTedivert.fr
A company specialized in outdoor space design and maintenance, offering a wide range of landscaping services to enhance environments and infrastructure |
65 | |||
| 21 |
JOURDAIN SAjourdain-group.com
An agriculture company located in France, specializing in agricultural operations and services in the Centre region |
58 | |||
| 22 |
Agro-Bio Antibodiesagrobio.stago.com
Expertise in antibody production, development, and characterization supporting pharmaceutical, diagnostic industries, and public institutions with tailored immunology solutions. |
50 | |||
| 23 |
ARTENAY BARSdelaviudacg.com
Manufacture confectionery and cereal bars for private labels, focusing on innovation and product development with clients and R&D. |
48 | |||
| 24 |
Umaïumai-natural.fr
Development of innovative, healthy, and sustainable skincare and haircare products using carefully selected French and European plants for sensitive skin. |
47 | |||
| 25 |
ATI INDUSTRIESati-industries.eu
French expert in small format incineration solutions, specializing in designing and manufacturing innovative equipment for cremation, waste treatment, and fume control |
38 | |||
| 26 |
ORRION CHEMICALS ORGAFORMoc-orgaform.com
Specializes in chemical formulation, product development, contract manufacturing, ensuring safety, quality, customer service, and environmental responsibility. |
37 | |||
| 27 |
IRIS Instrumentsiris-instruments.com
Manufacture and supply of geophysical instruments including resistivimeters, IP systems, electromagnetic and magnetic resonance equipment with installation, rental, service, and training. |
29 | |||
| 28 |
Nippon Shikizai Franceshikizai.fr
Formulation and manufacturing of luxury makeup, skincare, and scented products with expertise in powders, natural ingredients, and Japanese technology integration. |
27 | |||
| 29 | 26 | ||||
| 30 |
FARE - Réseau DEFfare-sa.com
Design and provide advanced fire safety systems including detection, extinction, sound systems, emergency exits, smoke control, and compartmentalization expertise. |
24 | |||
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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 Loiret department
- The largest companies in the Loiret department 432
- Manufacturers in the Loiret department 46
- Retail chains in the Loiret department 45
- Multinational companies in the Loiret department 44
- Public sector organisations in the Loiret department 42
- Hardware manufacturers in the Loiret department 30
- Critical infrastructure operators in the Loiret department 27
- Distributors and wholesalers in the Loiret department 27
- Contract manufacturers in the Loiret department 25
The same list elsewhere in France
- Companies with in-house R&D in France 8,749
- Companies with in-house R&D in Île-de-France 2,695
- Companies with in-house R&D in Auvergne-Rhône-Alpes 1,460
- Companies with in-house R&D in Occitanie 680
- Companies with in-house R&D in Grand Est 640
- Companies with in-house R&D in Provence-Alpes-Côte d'Azur 612
- Companies with in-house R&D in Nouvelle-Aquitaine 566
- Companies with in-house R&D in the Hauts-de-Seine department 510
- Companies with in-house R&D in the Rhône department 509
- 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