The companies listed in Loire-Atlantique are primarily contract manufacturers, with a strong presence in electronics, aerospace components, and plastics manufacturing. These are mostly mid-sized firms, with some larger entities like LACROIX, which designs and manufactures embedded electronics, and ACB, specializing in metal forming for aeronautical structures. Other notable companies include COVI, producing appertized food products, and SAPRENA, creating jobs for people with disabilities in various service sectors.
The data shows a concentration of manufacturing expertise, particularly in high-tech industrial applications. Many companies, such as HALGAND and SMCT, focus on the aviation and aerospace sector, providing specialized solutions like precision forming and assembly of aeronautical parts. This indicates a specialized industrial base within the department, catering to complex manufacturing needs.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
LACROIX - Electronicslacroix-electronics.com
Design and manufacture embedded electronics for diverse solutions, combining R&D with Industry 4.0 manufacturing in automotive, industrial, and healthcare sectors. |
1,039 | |||
| 2 |
ACBacb-ps.com
A company based in France specializing in metal forming for aeronautical structures, engines, and aircraft manufacturing Offers simulation, design, construction, and installation services |
607 | |||
| 3 | 201 | ||||
| 4 |
SAPRENAsaprena.com
Creation of sustainable jobs for people with invisible disabilities in sectors like cleaning, landscaping, logistics, industrial maintenance, catering, and packaging. |
169 | |||
| 5 |
COFIDUR SEICOseico.fr
Expertise in electronics manufacturing providing innovative product solutions for industry, IoT, security, automotive, and energy sectors. |
142 | |||
| 6 |
HALGANDgroupe-halgand.com
An industrial group specializing in aerospace, defense, space, and rail sectors, providing global technical solutions for design, manufacturing, machining, forming, and assembly |
139 | |||
| 7 |
EUROPE TECHNOLOGIESeuropetechnologies.com
This group offers expertise in industrializing and manufacturing composite and metallic parts, designing robot cells and machines for various processes, and providing international MRO services across industries. |
116 | |||
| 8 |
Team Plastiqueteamplastique.com
Provides custom thermoforming solutions, from design to delivery, utilizing advanced technologies, robotic production, and certified processes for various industries. |
107 | |||
| 9 |
SMCTgroupeherve.com
Specialized in precision forming, welding, assembly of aeronautical parts, SMCT provides adjustment services for aircraft parts with over 25 years of experience |
105 | |||
| 10 |
RBL Plastiquesrbl.fr
Specialist in custom thermoformed plastic parts production, offering tailored solutions with various materials, sizes, and finishes for multiple industries. |
82 | |||
| 11 |
DEMGY Atlantiquedemgy.com
Specializes in plastic and composite materials, offering machining, injection, thermoforming, surface treatment, and metal substitution for weight reduction. |
75 | |||
| 12 |
LOIRETECHloiretech.com
Designs and manufactures tooling for forming and finishing metal, composite, and thermoplastic materials for transportation, defense, and energy markets Provides innovative, sustainable solutions |
75 | |||
| 13 |
ASI PRODasiprod.fr
Provides diverse production services including laundry, assembly, packaging, paper shaping, and pallet manufacturing and repair across multiple workshops. |
69 | |||
| 14 |
KALITE
Established in 2011, KALITE specializes in the first and second processing of pork meat, known for its quality services with over 200 employees across several sites |
67 | |||
| 15 | 64 | ||||
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 | 55 | ||||
| 17 |
Groupe SOFIRAgroupe-sofira.fr
Specialized in machining and profiling for the aerospace industry since 1954, offering autonomy through in-house surface treatment processes |
54 | |||
| 18 |
EDH Hydrauliqueedh.fr
Specialized in producing hydraulic reservoirs and accessories for over 20 years, this company offers standard and custom solutions, prioritizing quality, reactivity, and flexibility for client needs |
44 | |||
| 19 |
Naobiosnaobios.com
Bioprocess development and contract manufacturing services for viral vaccines and vectors, acquired by Clean Biologics in 2019, supports clients for batch manufacture |
38 | |||
| 20 |
MB PRODUCTIONmbproduction.eu
With 33 years of experience, MB Production offers a complete service for optical and sunglasses production, including design, prototyping, machining, assembly, and finishing |
36 | |||
| 21 |
4MOD TECHNOLOGY4modtechnology.com
Combining design principles with advanced technology to create meaningful and impactful user experiences across various digital platforms and products. |
35 | |||
| 22 |
MHB - Mécanique et Hydraulique du Brivetmhb44.com
Specializing in machining complex, high-tech parts for Aerospace, Oil & Gas, Semiconductor, Defense, and General Mechanics sectors, with ISO 9001 certification and state-of-the-art equipment |
32 | |||
| 23 |
Bewell Nutraceutiquebewell-nutra.com
Specializing in custom-made dietary supplements, providing full-service solutions to meet personalized nutritional needs and well-being goals |
31 | |||
| 24 |
LEGÉ Haute-Façon
Manufacturer of high-end women's ready-to-wear clothing specializing in draped tailoring for top fashion houses, using a variety of luxurious materials and advanced production techniques |
30 | |||
| 25 |
BENE SOLUTIONSbene-solutions.com
Specializes in precision machining of various sizes and industrial integration, serving advanced technology clients nationally and internationally. |
29 | |||
| 26 |
Etablissements GUILLOUZOUICguillouzouic.fr
With expertise since 1979, manufacturing custom metal components ranging from a few grams to several tons, for individual or series production |
25 | |||
| 27 |
DT SYSTEMESdtsystemes.fr
A machinery company based in France, specializing in various types of machinery and equipment for industrial and commercial applications |
21 | |||
| 28 |
MHS Electronicsmhs-electronics.com
MHS Electronics provides Silicon Foundry Services with a focus on Analog and Mixed-Signal technology for various markets including telecommunications, aerospace, and automotive |
20 | |||
| 29 |
SACMO COUËRONsacmo.fr
Precision mechanical engineering and metalworking company specializing in designing and manufacturing large-scale welded parts and tools |
16 | |||
| 30 |
LUSSAULT-MECARIAlussault-mecaria.fr
Specialized in machining for demanding sectors like agri-food and oil, the company offers small to medium series, unit parts, assemblies, welding, and urgent stock-based solutions |
15 | |||
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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 12, 2026.
More company lists in the Loire-Atlantique department
- The largest companies in the Loire-Atlantique department 2,044
- Companies with in-house R&D in the Loire-Atlantique department 207
- Retail chains in the Loire-Atlantique department 162
- Multinational companies in the Loire-Atlantique department 159
- Professional services firms in the Loire-Atlantique department 158
- Software Development companies in the Loire-Atlantique department 137
- SaaS companies in the Loire-Atlantique department 135
- IT services companies in the Loire-Atlantique department 130
- Manufacturers in the Loire-Atlantique department 125
- IT Services and IT Consulting companies in the Loire-Atlantique department 110
- Consulting firms in the Loire-Atlantique department 94
- Distributors and wholesalers in the Loire-Atlantique department 94
- Hardware manufacturers in the Loire-Atlantique department 86
- Business Consulting and Services companies in the Loire-Atlantique department 83
- Public sector organisations in the Loire-Atlantique department 80
- Family-owned companies in the Loire-Atlantique department 71
- Education providers in the Loire-Atlantique department 68
- Real Estate companies in the Loire-Atlantique department 67
- Financial services firms in the Loire-Atlantique department 65
- Law Practice companies in the Loire-Atlantique department 62
- Retail companies in the Loire-Atlantique department 61
- Subscription businesses in the Loire-Atlantique department 61
- Critical infrastructure operators in the Loire-Atlantique department 58
- Events Services companies in the Loire-Atlantique department 58
The same list elsewhere in France
- Contract manufacturers in France 2,250
- Contract manufacturers in Auvergne-Rhône-Alpes 523
- Contract manufacturers in Île-de-France 263
- Contract manufacturers in Pays de la Loire 217
- Contract manufacturers in Grand Est 192
- Contract manufacturers in Nouvelle-Aquitaine 180
- Contract manufacturers in Bourgogne-Franche-Comté 152
- Contract manufacturers in Occitanie 139
- Contract manufacturers in Hauts-de-France 136
- Contract manufacturers in Provence-Alpes-Côte d'Azur 111
- Contract manufacturers in Centre-Val de Loire 105
- Contract manufacturers in Normandy 101
- Contract manufacturers in Brittany 93
- Contract manufacturers in the Rhône department 87
- Contract manufacturers in the Haute-Savoie department 84
- Contract manufacturers in the Isère department 68
- Contract manufacturers in the Ain department 64
- Contract manufacturers in the Doubs department 56
- Contract manufacturers in the Nord department 56
- Contract manufacturers in the Maine-et-Loire department 55
- Contract manufacturers in the Haute-Garonne department 54
- Contract manufacturers in the Loire department 49
- Contract manufacturers in the Bouches-du-Rhône department 45
- Contract manufacturers in Paris 73