# Top 30 manufacturers in the Loire-Atlantique department
Tamtam tracks 125 manufacturers headquartered in the Loire-Atlantique department. This list ranks the 30 largest by number of employees on LinkedIn, led by Chantiers de l'Atlantique, EURIAL, la branche Lait dAgrial and LACROIX - Electronics. Their median headcount is 267. Half of them were founded in 1971 or later. The most common headquarters are Nantes (7), Carquefou (3) and Saint-Herblain (3).
The Loire-Atlantique department hosts a diverse range of manufacturing companies, from large industrial groups to specialized mid-sized firms. Chantiers de l'Atlantique, with 2472 employees, builds complex ships and marine installations. EURIAL, la branche Lait d'Agrial is a dairy cooperative, while LACROIX - Electronics designs and manufactures embedded electronics. Valneva is a specialty vaccine company, and NEWCLIP TECHNICS produces osteosynthesis implants.
These companies demonstrate a strong presence in advanced manufacturing and specialized industries. There is a notable cluster of companies involved in marine-related activities, including shipbuilding, marine power, and marine renewable energy solutions, alongside significant players in food processing and healthcare technology.
馃嚝馃嚪 Loire-Atlantique 路 30 companies 路 Updated Nov 12, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Chantiers de l'Atlantique](https://www.tamtam.ai/c/chantiers-de-l-atlantique) (chantiers-atlantique.com)
Marine construction company, building complex ships and marine installations, including passenger ships and substations. Global leader in design, manufacturing, and commissioning of innovative, environmentally friendly vessels. | Shipbuilding | 馃嚝馃嚪 Saint-Nazaire | 2,472 | 1861 |
| 2 | [EURIAL, la branche Lait dAgrial](https://www.tamtam.ai/c/eurial-la-branche-lait-dagrial) (eurial.eu)
Leading French dairy cooperative, producing goat cheese, specialty butter, mozzarella, and a range of fresh dairy products. | Food and Beverage Manufacturing | 馃嚝馃嚪 Nantes | 1,754 | 1990 |
| 3 | [LACROIX - Electronics](https://www.tamtam.ai/c/lacroix-electronics) (lacroix-electronics.com)
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 | 馃嚝馃嚪 Saint-Herblain | 1,039 | |
| 4 | [Sercel](https://www.tamtam.ai/c/sercel) (sercel.com)
Leading provider of high-standard subsurface measurement and data solutions for natural resources, infrastructure monitoring, energy transition, and defense sectors since 1956. | Manufacturing | 馃嚝馃嚪 Carquefou | 942 | 1956 |
| 5 | [Valneva](https://www.tamtam.ai/c/valneva) (valneva.com)
Specialty vaccine company developing prophylactic vaccines for infectious diseases, including travel vaccines and candidates for Lyme disease, Zika virus, and more | Biotechnology Research | 馃嚝馃嚪 Saint-Herblain | 666 | 2013 |
| 6 | [F脡TIS Group](https://www.tamtam.ai/c/fetis-group) (fetis.group)
Provides engineering products and services for off-road machinery, specialized vehicles, power generation, marine power, and manufacturing industries with focus on decarbonization. | Engineering Services | 馃嚝馃嚪 Nantes | 501 | 1978 |
| 7 | [NEWCLIP TECHNICS](https://www.tamtam.ai/c/newclip-technics) (newcliptechnics.com)
Design manufacture and market innovative osteosynthesis implants for elective surgery and traumatology with focus on quality and performance. | Medical Equipment Manufacturing | 馃嚝馃嚪 Haute Goulaine | 500 | 2002 |
| 8 | [ALCATEL SUBMARINE NETWORKS MARINE](https://www.tamtam.ai/c/alcatel-submarine-networks-marine)
Specializing in submarine network infrastructure, this consulting company is based in 脦ledefrance, France and provides management services for telecommunications projects | Business Consulting and Services | 馃嚝馃嚪 Nozay | 427 | |
| 9 | [Tipiak](https://www.tamtam.ai/c/tipiak) (tipiak.fr)
Food processing company, specializes in grocery products, frozen ready meals, bakery, and pastry catering. Focuses on quality, people, environment. | Food and Beverage Manufacturing | 馃嚝馃嚪 Saint-Herblain | 410 | 1967 |
| 10 | [Groupe Pilote](https://www.tamtam.ai/c/groupe-pilote) (groupe-pilote.com)
Manufacturer of leisure vehicles since 1962, developing 7 high-tech brands for travel and freedom, catering to diverse customer needs in France and internationally. | Motor Vehicle Manufacturing | 馃嚝馃嚪 La Limouzini猫re | 348 | 1962 |
| 11 | [FMGC](https://www.tamtam.ai/c/fmgc) (farinia.com)
Manufacture gray iron cast counterweights and ballast solutions for marine renewable energy, material handling, agriculture, and off-highway sectors. | Industrial Machinery Manufacturing | 馃嚝馃嚪 Soudan | 345 | |
| 12 | [TECHNA](https://www.tamtam.ai/c/techna) (groupe-techna.com)
Independent international group, expert in precision nutrition, breeding techniques, and natural health, serving agricultural production for 60 years. | Farming | 馃嚝馃嚪 Cou毛ron | 343 | 1964 |
| 13 | [ARMOR-IIMAK](https://www.tamtam.ai/c/armor-iimak) (armor-iimak.com)
A leading provider of thermal transfer ribbons, offering a comprehensive range of high-quality products and customer-focused solutions worldwide #thermaltransferribbons | Chemical Manufacturing | 馃嚝馃嚪 Nantes | 336 | |
| 14 | [APLIX - HOOK & LOOP](https://www.tamtam.ai/c/aplix-hook-and-loop) (aplix.com)
Specializes in innovative hook and loop fastening solutions for diverse industries including hygiene, automotive, aircraft, medical, packaging, and building sectors. | Textile Manufacturing | 馃嚝馃嚪 Le Cellier | 309 | 1958 |
| 15 | [MADIC group](https://www.tamtam.ai/c/madic-group) (groupe.madic.com)
innovative French industrialist in electronic payment, petroleum equipment, services, and Digital Media communication, with a focus on sustainable development values. | Oil and Gas | 馃嚝馃嚪 Nantes | 267 | 1971 |
| 16 | [ALGAM](https://www.tamtam.ai/c/algam) (algam.net)
Leading distributor of musical instruments and audio equipment in France, also manufacturing guitars and pianos with diverse professional teams. | Wholesale | 馃嚝馃嚪 Thouar茅-sur-Loire | 255 | 1971 |
| 17 | [Lhyfe](https://www.tamtam.ai/c/lhyfe) (lhyfe.com)
Pure player deploying modular, 100% green industrial hydrogen production plants for mobility and industry, clean and accessible. | Renewable Energy Power Generation | 馃嚝馃嚪 Nantes | 217 | 2017 |
| 18 | [Vaillant Group France](https://www.tamtam.ai/c/vaillant-group-france) (jobs.vaillant-group.com)
Development and manufacturing of heating and cooling systems focused on renewable energy, providing comfort and customized solutions in France. | Renewable Energy Equipment Manufacturing | 馃嚝馃嚪 Nantes | 205 | |
| 19 | [Groupe Janneau Industries](https://www.tamtam.ai/c/groupe-janneau-industries) (groupe-janneau.com)
Craftsmen specializing in high-quality window joinery, maintaining artisanal values and meticulous care for over 50 years. | Wholesale Building Materials | 馃嚝馃嚪 Le Loroux-Bottereau | 203 | 1973 |
| 20 | [COVI](https://www.tamtam.ai/c/covi) (covi.com)
Family-owned company specializing in appertized food products including prepared meals, canned meats, p芒t茅s, sauces, and soups for various brands. | Food and Beverage Manufacturing | 馃嚝馃嚪 Saint-S茅bastien-sur-Loire | 201 | 1965 |
| 21 | [Polysoude S.A.S](https://www.tamtam.ai/c/polysoude-s-a-s) (polysoude.com)
Designs, manufactures, and markets equipment for arc welding processes in various industries worldwide, with a focus on high-quality, innovative solutions | Automation Machinery Manufacturing | 馃嚝馃嚪 Nantes | 195 | 1961 |
| 22 | [SIDES](https://www.tamtam.ai/c/sides-saint-nazaire) (sides.fr)
A global provider of innovative and quality firefighting vehicles for airport, industrial, and civil defense markets with over 65 years of experience | Industrial Machinery Manufacturing | 馃嚝馃嚪 Saint-Nazaire | 173 | 1951 |
| 23 | [TIPIAK TRAITEUR PATISSIER](https://www.tamtam.ai/c/tipiak-traiteur-patissier) (carrieres.tipiak.fr)
Specialist in savory and sweet cocktail and appetizer bites, including fresh or frozen canap茅s, petits fours, and macarons. | Food and Beverage Manufacturing | 馃嚝馃嚪 Malville | 172 | 1967 |
| 24 | [WIRQUIN FRANCE](https://www.tamtam.ai/c/wirquin-france) (wirquingroup.com)
Design and manufacture water-efficient plumbing and sanitary products enhancing comfort, hygiene, and space-saving in bathrooms and kitchens. | Plastics Manufacturing | 馃嚝馃嚪 Carquefou | 162 | 1977 |
| 25 | [COFIDUR SEICO](https://www.tamtam.ai/c/cofidur-seico) (seico.fr)
Expertise in electronics manufacturing providing innovative product solutions for industry, IoT, security, automotive, and energy sectors. | Appliances, Electrical, and Electronics Manufacturing | 馃嚝馃嚪 Malville | 142 | 1981 |
| 26 | [HALGAND](https://www.tamtam.ai/c/halgand) (groupe-halgand.com)
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 | 馃嚝馃嚪 Saint-Br茅vin-les-Pins | 139 | 1974 |
| 27 | [EUROPE TECHNOLOGIES](https://www.tamtam.ai/c/europe-technologies) (europetechnologies.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. | Industrial Machinery Manufacturing | 馃嚝馃嚪 Carquefou | 116 | 1998 |
| 28 | [Groupe Maugin](https://www.tamtam.ai/c/groupe-maugin) (maugin.fr)
Design, manufacture, and sell PVC, aluminum, and steel windows, entrance doors, and roller shutters with innovative industrial production. | Wholesale Building Materials | 馃嚝馃嚪 Saint-Br茅vin-les-Pins | 107 | 1966 |
| 29 | [KUHN - HUARD S.A.](https://www.tamtam.ai/c/kuhn-huard-s-a)
A machinery company in France specializing in manufacturing a variety of equipment, located in Chateaubriant | Machinery Manufacturing | 馃嚝馃嚪 Chateaubriant | 99 | |
| 30 | [Definox Group](https://www.tamtam.ai/c/definox-group) (definox.com)
A leading manufacturer of stainless steel valves and equipment for food, cosmetics, pharmaceutical, and fine chemicals industries, offering customized solutions and services globally | Manufacturing | 馃嚝馃嚪 Clisson | 97 | 1968 |
## 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
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- [Consulting firms in the Loire-Atlantique department](https://www.tamtam.ai/l/consulting-firms-loire-atlantique) (94)
- [Distributors and wholesalers in the Loire-Atlantique department](https://www.tamtam.ai/l/distributors-and-wholesalers-loire-atlantique) (94)
- [Hardware manufacturers in the Loire-Atlantique department](https://www.tamtam.ai/l/hardware-companies-loire-atlantique) (86)
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- [Public sector organisations in the Loire-Atlantique department](https://www.tamtam.ai/l/public-sector-organisations-loire-atlantique) (80)
- [Family-owned companies in the Loire-Atlantique department](https://www.tamtam.ai/l/family-owned-companies-loire-atlantique) (71)
- [Education providers in the Loire-Atlantique department](https://www.tamtam.ai/l/education-companies-loire-atlantique) (68)
- [Real Estate companies in the Loire-Atlantique department](https://www.tamtam.ai/l/real-estate-companies-loire-atlantique) (67)
- [Financial services firms in the Loire-Atlantique department](https://www.tamtam.ai/l/financial-services-firms-loire-atlantique) (65)
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- [Retail companies in the Loire-Atlantique department](https://www.tamtam.ai/l/retail-companies-loire-atlantique) (61)
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- [Construction companies in the Loire-Atlantique department](https://www.tamtam.ai/l/construction-companies-loire-atlantique) (57)
## The same list elsewhere in France
- [Manufacturers in France](https://www.tamtam.ai/l/manufacturers-france) (6,697)
- [Manufacturers in 脦le-de-France](https://www.tamtam.ai/l/manufacturers-ile-de-france) (1,515)
- [Manufacturers in Auvergne-Rh么ne-Alpes](https://www.tamtam.ai/l/manufacturers-auvergne-rhone-alpes) (1,216)
- [Manufacturers in Grand Est](https://www.tamtam.ai/l/manufacturers-grand-est) (573)
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- [Manufacturers in Provence-Alpes-C么te d'Azur](https://www.tamtam.ai/l/manufacturers-provence-alpes-cote-dazur) (394)
- [Manufacturers in Hauts-de-France](https://www.tamtam.ai/l/manufacturers-hauts-de-france) (369)
- [Manufacturers in the Rh么ne department](https://www.tamtam.ai/l/manufacturers-rhone) (322)
- [Manufacturers in Brittany](https://www.tamtam.ai/l/manufacturers-brittany) (307)
- [Manufacturers in the Hauts-de-Seine department](https://www.tamtam.ai/l/manufacturers-hauts-de-seine) (285)
- [Manufacturers in Bourgogne-Franche-Comt茅](https://www.tamtam.ai/l/manufacturers-bourgogne-franche-comte) (272)
- [Manufacturers in Normandy](https://www.tamtam.ai/l/manufacturers-normandy) (245)
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- [Manufacturers in the Nord department](https://www.tamtam.ai/l/manufacturers-nord) (204)
- [Manufacturers in the Bouches-du-Rh么ne department](https://www.tamtam.ai/l/manufacturers-bouches-du-rhone) (187)
- [Manufacturers in the Is猫re department](https://www.tamtam.ai/l/manufacturers-isere) (178)
- [Manufacturers in the Haute-Garonne department](https://www.tamtam.ai/l/manufacturers-haute-garonne) (159)
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- [Manufacturers in the Essonne department](https://www.tamtam.ai/l/manufacturers-essonne) (127)
- [Manufacturers in the Loire department](https://www.tamtam.ai/l/manufacturers-loire) (122)
- [Manufacturers in the Bas-Rhin department](https://www.tamtam.ai/l/manufacturers-bas-rhin) (118)
- [Manufacturers in Paris](https://www.tamtam.ai/l/manufacturers-paris) (546)
## The same list elsewhere
- [Manufacturers in the world](https://www.tamtam.ai/l/manufacturers-in-the-world) (39,579)
- [Manufacturers in Europe](https://www.tamtam.ai/l/manufacturers-in-europe) (18,156)
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Source: https://www.tamtam.ai/l/manufacturers-loire-atlantique