# The 25 largest companies in Concarneau

Tamtam tracks 25 companies headquartered in Concarneau. This list ranks all of them by number of employees on LinkedIn, led by PIRIOU, CFTO - Compagnie Française du Thon Océanique sas and Actemium Marine. Their median headcount is 28. Half of them were founded in 1994 or later.

The companies in Concarneau are largely involved in maritime industries, including shipbuilding and fisheries, alongside professional training and sports. These are mostly mid-sized firms, with a notable presence of companies founded in the mid-20th century.

PIRIOU specializes in shipbuilding, CFTO - Compagnie Française du Thon Océanique sas focuses on sustainable tuna fishing, Actemium Marine provides electric and hybrid propulsion systems for the maritime industry, and US CONCARNEAU is a football club. Synapsy develops cash register and management solutions for food service and retail. A common thread among many of these companies is their connection to the sea, either directly through their activities or by supporting related sectors.

🇫🇷 Concarneau · 25 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [PIRIOU](https://www.tamtam.ai/c/piriou) (piriou.com)<br>Shipbuilding, repair, naval engineering, and services for vessels up to 120m, delivered worldwide to private and public shipowners. | Shipbuilding | 🇫🇷 Concarneau | 408 | 1965 |
| 2 | [CFTO - Compagnie Française du Thon Océanique sas](https://www.tamtam.ai/c/cfto-compagnie-francaise-du-thon-oceanique-sas) (cfto.eu)<br>Specializes in sustainable tropical tuna fishing with advanced vessels, supplying high-quality tuna globally while prioritizing marine resource conservation. | Fisheries | 🇫🇷 Concarneau | 185 | 1965 |
| 3 | [Actemium Marine](https://www.tamtam.ai/c/actemium-marine) (actemium-marine.com)<br>Actemium Marine specializes in electric and hybrid propulsion systems, energy management, production, and storage for the maritime industry, offering energy-efficient solutions | Automation Machinery Manufacturing | 🇫🇷 Concarneau | 158 | 1957 |
| 4 | [Concarneau Cornouaille Agglomération](https://www.tamtam.ai/c/concarneau-cornouaille-agglomeration) (cca.bzh)<br>An intermunicipal structure located in Finistère, Brittany, France, comprising 9 cities and succeeding the Concarneau Cornouaille community of municipalities | Government Administration | 🇫🇷 Concarneau | 122 | 1994 |
| 5 | [US CONCARNEAU](https://www.tamtam.ai/c/us-concarneau) (usc-concarneau.com)<br>A football club founded in 1911, competing in France's third division They offer VIP experiences during home matches and exclusive events for partners | Spectator Sports | 🇫🇷 Concarneau | 107 | 1911 |
| 6 | [INB](https://www.tamtam.ai/c/inb) (institut-nautique.com)<br>This company is a center for nautical professionals' training, offering initial and continuing education for over 450 individuals annually, including apprenticeships, retraining, and professional development | Professional Training and Coaching | 🇫🇷 Concarneau | 82 | 1965 |
| 7 | [Synapsy](https://www.tamtam.ai/c/synapsy) (synapsy.fr)<br>Since 2005, Synapsy develops cash register and management solutions for food service and retail businesses Certified software enhances efficiency and boosts sales Offers additional services | IT System Custom Software Development | 🇫🇷 Concarneau | 72 | 2005 |
| 8 | [MerConcept](https://www.tamtam.ai/c/merconcept) (merconcept.com)<br>Specialized in engineering, design studies, and construction of cutting-edge boats, it creates and develops innovative sports projects. | Spectator Sports | 🇫🇷 Concarneau | 55 | 2006 |
| 9 | [Brasserie de Bretagne](https://www.tamtam.ai/c/brasserie-de-bretagne) (brasserie-bretagne.fr)<br>Crafting four main Breton beer brands with focus on quality, taste, and innovation, located in Finistère since 1998. | Food and Beverage Manufacturing | 🇫🇷 Concarneau | 47 | 1998 |
| 10 | [Le Comptoir](https://www.tamtam.ai/c/le-comptoir-concarneau)<br>A bar and restaurant located in the center of Concarneau, facing the Ville Close, offering food and drinks to guests | Restaurants | 🇫🇷 Concarneau | 44 | 1993 |
| 11 | [adekwatts](https://www.tamtam.ai/c/adekwatts) (adekwatts.fr)<br>Provider of solutions for solar photovoltaic self-consumption and energy-saving advisory services | Renewable Energy Semiconductor Manufacturing | 🇫🇷 Concarneau | 42 | 2019 |
| 12 | [KAÏROS (Sailing / Environnement)](https://www.tamtam.ai/c/kairos-sailing-environnement) (kairos-jourdain.com)<br>Specializes in composite materials, supporting low-impact projects through eco-design, project management, research and development. Also supports offshore racing and adventure sailing projects. | Environmental Services | 🇫🇷 Concarneau | 31 | 2007 |
| 13 | [JFA Yachts](https://www.tamtam.ai/c/jfa-yachts) (jfa-yachts.com)<br>A shipyard specializing in custom and semi-custom yachts, offering new builds and refits with a focus on performance, reliability, and luxury for varied projects | Shipbuilding | 🇫🇷 Concarneau | 28 | 1993 |
| 14 | [E.Leclerc Concarneau](https://www.tamtam.ai/c/e-leclerc-concarneau) (e.leclerc)<br>Established since 1969, this hypermarket in Concarneau prioritizes customer and employee satisfaction, offering autonomy and a dynamic, innovative environment Join us! | Retail Groceries | 🇫🇷 Concarneau | 26 | 1969 |
| 15 | [LEADS GENERATION](https://www.tamtam.ai/c/leads-generation) (leads-generation.fr)<br>The company helps businesses discover and choose software to improve productivity through two platforms: one for white papers and ebooks, and one for SaaS software | Advertising Services | 🇫🇷 Concarneau | 25 | 2016 |
| 16 | [Actemium Cornouaille](https://www.tamtam.ai/c/actemium-cornouaille) (actemium.fr)<br>A specialized industrial electrical company offering tailored engineering, integration, production, and support services, with expertise in high and low voltage electrical engineering, renewable energies, and mechatronics | Automation Machinery Manufacturing | 🇫🇷 Concarneau | 22 | 1957 |
| 17 | [Low-tech Lab](https://www.tamtam.ai/c/low-tech-lab) (lowtechlab.org)<br>A collaborative program documenting and promoting local low-tech solutions for widespread adoption, aimed at those interested in low-tech innovation | Internet Publishing | 🇫🇷 Concarneau | 20 | 2013 |
| 18 | [BARILLEC SAS](https://www.tamtam.ai/c/barillec-sas) (actemium-marine.com)<br>Shipbuilding company located in Concarneau, Brittany, specializing in constructing and repairing ships and marine vessels in France. | Shipbuilding | 🇫🇷 Concarneau | 18 |  |
| 19 | [Protection Incendie Cornouaille 29](https://www.tamtam.ai/c/protection-incendie-cornouaille-29) (pic29.com)<br>Specializing in marine and industrial fire safety for over 30 years, we provide expertise, systems supply, installation, maintenance, and training worldwide | Fire Protection | 🇫🇷 Concarneau | 10 | 1990 |
| 20 | [Groupe Appro](https://www.tamtam.ai/c/groupe-appro) (appro-concept.fr)<br>Offers expertise for vehicle purchase, sale, trade-in, and extended warranties, providing tailored solutions for new and used vehicles. | Retail Motor Vehicles | 🇫🇷 Concarneau | 10 |  |
| 21 | [NICOT ENTREPRISES](https://www.tamtam.ai/c/nicot-entreprises) (groupe-nicot.com)<br>Family-owned group specializing in garden centers, pet stores, cold storage, and agro-food sectors with strong local and regional presence. | Retail | 🇫🇷 Concarneau | 10 | 1934 |
| 22 | [Camping Bretagne Le Cabellou Plage - Concarneau - Finistère sud](https://www.tamtam.ai/c/camping-bretagne-le-cabellou-plage-concarneau-finistere-sud) (le-cabellou-plage.com)<br>A 5-star family-friendly camping in southern Finistère, offering a range of accommodations, activities, and services including a new sports field, aquatic area, and entertainment facilities | Hospitality | 🇫🇷 Concarneau | 6 | 2018 |
| 23 | [Gold of Bengal](https://www.tamtam.ai/c/gold-of-bengal) (goldofbengal.com)<br>A non-profit association focusing on research, development, and promotion of environmentally friendly solutions to meet human needs while respecting local resources and knowledge | Renewables & Environment | 🇫🇷 Concarneau | 3 | 2013 |
| 24 | [BS MECA](https://www.tamtam.ai/c/bs-meca) (bsmeca.fr)<br>Providing flexible and high-quality manufacturing services from prototype to production, prioritizing customer satisfaction, efficiency, and cost effectiveness | Industrial Machinery Manufacturing | 🇫🇷 Concarneau | 3 | 2017 |
| 25 | [CORNOUALIA](https://www.tamtam.ai/c/cornoualia) (cornoualia.bzh)<br>Specializing in shared time workforce management, offering flexible solutions for businesses in need of part-time labor assistance | Human Resources Services | 🇫🇷 Concarneau | 3 | 2000 |

## 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.

## The same list elsewhere in France

- [The largest companies in France](https://www.tamtam.ai/l/largest-companies-france) (90,812)
- [The largest companies in Île-de-France](https://www.tamtam.ai/l/largest-companies-ile-de-france) (36,142)
- [The largest companies in Auvergne-Rhône-Alpes](https://www.tamtam.ai/l/largest-companies-auvergne-rhone-alpes) (11,033)
- [The largest companies in Provence-Alpes-Côte d'Azur](https://www.tamtam.ai/l/largest-companies-provence-alpes-cote-dazur) (6,698)
- [The largest companies in Occitanie](https://www.tamtam.ai/l/largest-companies-occitanie) (5,767)
- [The largest companies in Grand Est](https://www.tamtam.ai/l/largest-companies-grand-est) (5,706)
- [The largest companies in Nouvelle-Aquitaine](https://www.tamtam.ai/l/largest-companies-nouvelle-aquitaine) (5,459)
- [The largest companies in the Hauts-de-Seine department](https://www.tamtam.ai/l/largest-companies-hauts-de-seine) (5,160)
- [The largest companies in the Rhône department](https://www.tamtam.ai/l/largest-companies-rhone) (4,813)
- [The largest companies in Hauts-de-France](https://www.tamtam.ai/l/largest-companies-hauts-de-france) (4,505)
- [The largest companies in Pays de la Loire](https://www.tamtam.ai/l/largest-companies-pays-de-la-loire) (4,266)
- [The largest companies in the Bouches-du-Rhône department](https://www.tamtam.ai/l/largest-companies-bouches-du-rhone) (3,317)
- [The largest companies in Brittany](https://www.tamtam.ai/l/largest-companies-brittany) (3,058)
- [The largest companies in the Nord department](https://www.tamtam.ai/l/largest-companies-nord) (2,806)
- [The largest companies in the Gironde department](https://www.tamtam.ai/l/largest-companies-gironde) (2,435)
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- [The largest companies in Normandy](https://www.tamtam.ai/l/largest-companies-normandy) (2,380)
- [The largest companies in the Loire-Atlantique department](https://www.tamtam.ai/l/largest-companies-loire-atlantique) (2,044)
- [The largest companies in Bourgogne-Franche-Comté](https://www.tamtam.ai/l/largest-companies-bourgogne-franche-comte) (1,867)
- [The largest companies in Centre-Val de Loire](https://www.tamtam.ai/l/largest-companies-centre-val-de-loire) (1,701)
- [The largest companies in the Alpes-Maritimes department](https://www.tamtam.ai/l/largest-companies-alpes-maritimes) (1,538)
- [The largest companies in Paris](https://www.tamtam.ai/l/largest-companies-paris) (22,789)
- [The largest companies in Lyon](https://www.tamtam.ai/l/largest-companies-lyon) (2,679)
- [The largest companies in Toulouse](https://www.tamtam.ai/l/largest-companies-toulouse) (1,563)

## The same list elsewhere

- [The largest companies in the world](https://www.tamtam.ai/l/largest-companies-in-the-world) (415,122)
- [The largest companies in Europe](https://www.tamtam.ai/l/largest-companies-in-europe) (213,553)

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Source: https://www.tamtam.ai/l/largest-companies-concarneau