# The 30 largest contract manufacturers in the Loire-Atlantique department

Tamtam tracks 43 contract manufacturers headquartered in the Loire-Atlantique department. This list ranks the 30 largest by number of employees on LinkedIn, led by LACROIX - Electronics, ACB and COVI. Their median headcount is 64. Half of them were founded in 1988 or later. The most common headquarters are Nantes (4), Saint-Herblain (3) and Saint-Nazaire (2).

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.

🇫🇷 Loire-Atlantique · 30 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [LACROIX - Electronics](https://www.tamtam.ai/c/lacroix-electronics) (lacroix-electronics.com)<br>Design and manufacture embedded electronics for diverse solutions, combining R&D with Industry 4.0 manufacturing in automotive, industrial, and healthcare sectors. | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Saint-Herblain | 1,039 |  |
| 2 | [ACB](https://www.tamtam.ai/c/acb) (acb-ps.com)<br>A company based in France specializing in metal forming for aeronautical structures, engines, and aircraft manufacturing Offers simulation, design, construction, and installation services | Mechanical Or Industrial Engineering | 🇫🇷 Nantes | 607 |  |
| 3 | [COVI](https://www.tamtam.ai/c/covi) (covi.com)<br>Family-owned company specializing in appertized food products including prepared meals, canned meats, pâtés, sauces, and soups for various brands. | Food and Beverage Manufacturing | 🇫🇷 Saint-Sébastien-sur-Loire | 201 | 1965 |
| 4 | [SAPRENA](https://www.tamtam.ai/c/saprena) (saprena.com)<br>Creation of sustainable jobs for people with invisible disabilities in sectors like cleaning, landscaping, logistics, industrial maintenance, catering, and packaging. | Business Consulting and Services | 🇫🇷 Bouaye | 169 | 1987 |
| 5 | [COFIDUR SEICO](https://www.tamtam.ai/c/cofidur-seico) (seico.fr)<br>Expertise in electronics manufacturing providing innovative product solutions for industry, IoT, security, automotive, and energy sectors. | Appliances, Electrical, and Electronics Manufacturing | 🇫🇷 Malville | 142 | 1981 |
| 6 | [HALGAND](https://www.tamtam.ai/c/halgand) (groupe-halgand.com)<br>An industrial group specializing in aerospace, defense, space, and rail sectors, providing global technical solutions for design, manufacturing, machining, forming, and assembly | Aviation and Aerospace Component Manufacturing | 🇫🇷 Saint-Brévin-les-Pins | 139 | 1974 |
| 7 | [EUROPE TECHNOLOGIES](https://www.tamtam.ai/c/europe-technologies) (europetechnologies.com)<br>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. | Industrial Machinery Manufacturing | 🇫🇷 Carquefou | 116 | 1998 |
| 8 | [Team Plastique](https://www.tamtam.ai/c/team-plastique) (teamplastique.com)<br>Provides custom thermoforming solutions, from design to delivery, utilizing advanced technologies, robotic production, and certified processes for various industries. | Plastics Manufacturing | 🇫🇷 Châteaubriant | 107 | 1988 |
| 9 | [SMCT](https://www.tamtam.ai/c/smct) (groupeherve.com)<br>Specialized in precision forming, welding, assembly of aeronautical parts, SMCT provides adjustment services for aircraft parts with over 25 years of experience | Aviation and Aerospace Component Manufacturing | 🇫🇷 Saint-Nazaire | 105 | 1996 |
| 10 | [RBL Plastiques](https://www.tamtam.ai/c/rbl-plastiques) (rbl.fr)<br>Specialist in custom thermoformed plastic parts production, offering tailored solutions with various materials, sizes, and finishes for multiple industries. | Plastics Manufacturing | 🇫🇷 Châteaubriant | 82 | 1979 |
| 11 | [DEMGY Atlantique](https://www.tamtam.ai/c/demgy-atlantique) (demgy.com)<br>Specializes in plastic and composite materials, offering machining, injection, thermoforming, surface treatment, and metal substitution for weight reduction. | Plastics Manufacturing | 🇫🇷 Getigne | 75 | 1947 |
| 12 | [LOIRETECH](https://www.tamtam.ai/c/loiretech) (loiretech.com)<br>Designs and manufactures tooling for forming and finishing metal, composite, and thermoplastic materials for transportation, defense, and energy markets Provides innovative, sustainable solutions | Aviation and Aerospace Component Manufacturing | 🇫🇷 Bouguenais | 75 | 1988 |
| 13 | [ASI PROD](https://www.tamtam.ai/c/asi-prod) (asiprod.fr)<br>Provides diverse production services including laundry, assembly, packaging, paper shaping, and pallet manufacturing and repair across multiple workshops. | Transportation, Logistics, Supply Chain and Storage | 🇫🇷 Thouaré-sur-Loire | 69 | 1992 |
| 14 | [KALITE](https://www.tamtam.ai/c/kalite)<br>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 | Wholesale Food and Beverage | 🇫🇷 La Chapelle-sur-Erdre | 67 |  |
| 15 | [SFCMM](https://www.tamtam.ai/c/sfcmm) (sfcmm.fr)<br>Specializes in cold bending, laser cutting, and sheet metal rolling for tubes and profiles with extensive manufacturing facilities and certifications. | Manufacturing | 🇫🇷 Saint-Herblain | 64 | 1965 |
| 16 | [MAG'M](https://www.tamtam.ai/c/mag-m) (magm.fr)<br>A leading manufacturer of premium French macarons and mini pastries blending tradition and innovation, with high standards for quality and safety They supply major distributors worldwide | Food and Beverage Manufacturing | 🇫🇷 Geneston | 55 | 2005 |
| 17 | [Groupe SOFIRA](https://www.tamtam.ai/c/groupe-sofira) (groupe-sofira.fr)<br>Specialized in machining and profiling for the aerospace industry since 1954, offering autonomy through in-house surface treatment processes | Manufacturing | 🇫🇷 Saint-Nazaire | 54 | 1954 |
| 18 | [EDH Hydraulique](https://www.tamtam.ai/c/edh-hydraulique) (edh.fr)<br>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 | Machinery Manufacturing | 🇫🇷 Mesanger | 44 | 1992 |
| 19 | [Naobios](https://www.tamtam.ai/c/naobios) (naobios.com)<br>Bioprocess development and contract manufacturing services for viral vaccines and vectors, acquired by Clean Biologics in 2019, supports clients for batch manufacture | Biotechnology Research | 🇫🇷 Saint-Herblain | 38 |  |
| 20 | [MB PRODUCTION](https://www.tamtam.ai/c/mb-production-nantes) (mbproduction.eu)<br>With 33 years of experience, MB Production offers a complete service for optical and sunglasses production, including design, prototyping, machining, assembly, and finishing | Retail Luxury Goods and Jewelry | 🇫🇷 Nantes | 36 | 1990 |
| 21 | [4MOD TECHNOLOGY](https://www.tamtam.ai/c/4mod-technology) (4modtechnology.com)<br>Combining design principles with advanced technology to create meaningful and impactful user experiences across various digital platforms and products. | Computers and Electronics Manufacturing | 🇫🇷 Nantes | 35 | 2007 |
| 22 | [MHB - Mécanique et Hydraulique du Brivet](https://www.tamtam.ai/c/mhb-mecanique-et-hydraulique-du-brivet) (mhb44.com)<br>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 | Industrial Machinery Manufacturing | 🇫🇷 Besné | 32 | 1987 |
| 23 | [Bewell Nutraceutique](https://www.tamtam.ai/c/bewell-nutraceutique) (bewell-nutra.com)<br>Specializing in custom-made dietary supplements, providing full-service solutions to meet personalized nutritional needs and well-being goals | Pharmaceutical Manufacturing | 🇫🇷 Vallet | 31 | 2009 |
| 24 | [LEGÉ Haute-Façon](https://www.tamtam.ai/c/lege-haute-facon)<br>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 | Retail Apparel and Fashion | 🇫🇷 Legé | 30 | 1988 |
| 25 | [BENE SOLUTIONS](https://www.tamtam.ai/c/bene-solutions) (bene-solutions.com)<br>Specializes in precision machining of various sizes and industrial integration, serving advanced technology clients nationally and internationally. | Industrial Machinery Manufacturing | 🇫🇷 Besné | 29 | 1980 |
| 26 | [Etablissements GUILLOUZOUIC](https://www.tamtam.ai/c/etablissements-guillouzouic) (guillouzouic.fr)<br>With expertise since 1979, manufacturing custom metal components ranging from a few grams to several tons, for individual or series production | Manufacturing | 🇫🇷 Missillac | 25 | 1979 |
| 27 | [DT SYSTEMES](https://www.tamtam.ai/c/dt-systemes) (dtsystemes.fr)<br>A machinery company based in France, specializing in various types of machinery and equipment for industrial and commercial applications | Industrial Machinery Manufacturing | 🇫🇷 Sainte-Luce-sur-Loire | 21 | 2012 |
| 28 | [MHS Electronics](https://www.tamtam.ai/c/mhs-electronics) (mhs-electronics.com)<br>MHS Electronics provides Silicon Foundry Services with a focus on Analog and Mixed-Signal technology for various markets including telecommunications, aerospace, and automotive | Semiconductor Manufacturing | 🇫🇷 Nantes | 20 |  |
| 29 | [SACMO COUËRON](https://www.tamtam.ai/c/sacmo-coueron) (sacmo.fr)<br>Precision mechanical engineering and metalworking company specializing in designing and manufacturing large-scale welded parts and tools | Industrial Machinery Manufacturing | 🇫🇷 Couëron | 16 | 1991 |
| 30 | [LUSSAULT-MECARIA](https://www.tamtam.ai/c/lussault-mecaria) (lussault-mecaria.fr)<br>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 | Industrial Machinery Manufacturing | 🇫🇷 Riaillé | 15 | 1865 |

## 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.

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- [Family-owned companies in the Loire-Atlantique department](https://www.tamtam.ai/l/family-owned-companies-loire-atlantique) (71)
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## The same list elsewhere in France

- [Contract manufacturers in France](https://www.tamtam.ai/l/contract-manufacturers-france) (2,250)
- [Contract manufacturers in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/contract-manufacturers-auvergne-rhone-alpes) (523)
- [Contract manufacturers in Île-de-France](https://www.tamtam.ai/l/contract-manufacturers-ile-de-france) (263)
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- [Contract manufacturers in Bourgogne-Franche-Comté](https://www.tamtam.ai/l/contract-manufacturers-bourgogne-franche-comte) (152)
- [Contract manufacturers in Occitanie](https://www.tamtam.ai/l/contract-manufacturers-occitanie) (139)
- [Contract manufacturers in Hauts-de-France](https://www.tamtam.ai/l/contract-manufacturers-hauts-de-france) (136)
- [Contract manufacturers in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/contract-manufacturers-provence-alpes-cote-dazur) (111)
- [Contract manufacturers in Centre-Val de Loire](https://www.tamtam.ai/l/contract-manufacturers-centre-val-de-loire) (105)
- [Contract manufacturers in Normandy](https://www.tamtam.ai/l/contract-manufacturers-normandy) (101)
- [Contract manufacturers in Brittany](https://www.tamtam.ai/l/contract-manufacturers-brittany) (93)
- [Contract manufacturers in the Rhône department](https://www.tamtam.ai/l/contract-manufacturers-rhone) (87)
- [Contract manufacturers in the Haute-Savoie department](https://www.tamtam.ai/l/contract-manufacturers-haute-savoie) (84)
- [Contract manufacturers in the Isère department](https://www.tamtam.ai/l/contract-manufacturers-isere) (68)
- [Contract manufacturers in the Ain department](https://www.tamtam.ai/l/contract-manufacturers-ain) (64)
- [Contract manufacturers in the Doubs department](https://www.tamtam.ai/l/contract-manufacturers-doubs) (56)
- [Contract manufacturers in the Nord department](https://www.tamtam.ai/l/contract-manufacturers-nord) (56)
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- [Contract manufacturers in the Haute-Garonne department](https://www.tamtam.ai/l/contract-manufacturers-haute-garonne) (54)
- [Contract manufacturers in the Loire department](https://www.tamtam.ai/l/contract-manufacturers-loire) (49)
- [Contract manufacturers in the Bouches-du-Rhône department](https://www.tamtam.ai/l/contract-manufacturers-bouches-du-rhone) (45)
- [Contract manufacturers in Paris](https://www.tamtam.ai/l/contract-manufacturers-paris) (73)

## The same list elsewhere

- [Contract manufacturers in the world](https://www.tamtam.ai/l/contract-manufacturers-in-the-world) (7,964)
- [Contract manufacturers in Europe](https://www.tamtam.ai/l/contract-manufacturers-in-europe) (4,461)

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Source: https://www.tamtam.ai/l/contract-manufacturers-loire-atlantique