2025’s Top 10 Nuclear Companies in France

We’re tracking 90,100 Nuclear companies in France.

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Companies	Employees	HQ location	Revenue	Founded	Estimated Traffic	Industries
Cnrs	View 19,358 employees	🇫🇷 Paris, Ile-de-France, Paris+54	$ 500-1000M	1939	15,282,999	Manufacturing, Nanotechnology
Orano	View 11,708 employees	🇫🇷 Hauts-de-Seine, Ile-de-France, Châtillon+17	$ 500-1000M	2018	231,876	Energy, Nuclear
Framatome	View 11,842 employees	🇫🇷 Hauts-de-Seine, Ile-de-France, Courbevoie+12	$ 500-1000M	1958	93,202	Industrial Engineering, Industrial
Inria	View 2,936 employees	🇫🇷 Ille-et-Vilaine, Brittany, Rennes+13	$ 500-1000M	1967	3,190,874	Nuclear, Energy
Iter Organization	View 1,419 employees	🇫🇷 Provence-Alpes-Cote D’Azur\|Bouches-du-Rhone, St. Paul-lez-durance+1	$ 500-1000M	2006	2,226,525	Manufacturing, Nuclear
TechnicAtome	View 1,306 employees	🇫🇷 Essonne, Ile-de-France, Villiers-le-bâcle+12	$ 500-1000M	1972	56,028	Industrial Engineering, Nuclear
Assystem	View 6,388 employees	🇫🇷 Hauts-de-Seine, Ile-de-France, Courbevoie+64	$ 100-500M	1966	365,227	Energy, Nuclear
HEF Groupe	View 334 employees	🇫🇷 Loire, Auvergne-Rhône-Alpes, Andrézieux-bouthéon+3	$ 100-500M	1953	19,033	Nuclear
Andra	View 629 employees	🇫🇷 Hauts-de-Seine, Ile-de-France, Châtenay-malabry+9	$ 100-500M	1991	186,166	Environmental Engineering, Waste Management
Asn	View 181 employees	🇫🇷 Montrouge+1	$ 10-50M	2006	105,462	Nuclear, Environmental Engineering
Cnrs	View 19,358 employees	🇫🇷 Paris, Ile-de-France, Paris+54	$ 500-1000M	1939	15,282,999	Manufacturing, Nanotechnology
Orano	View 11,708 employees	🇫🇷 Hauts-de-Seine, Ile-de-France, Châtillon+17	$ 500-1000M	2018	231,876	Energy, Nuclear
Framatome	View 11,842 employees	🇫🇷 Hauts-de-Seine, Ile-de-France, Courbevoie+12	$ 500-1000M	1958	93,202	Industrial Engineering, Industrial
Inria	View 2,936 employees	🇫🇷 Ille-et-Vilaine, Brittany, Rennes+13	$ 500-1000M	1967	3,190,874	Nuclear, Energy
Iter Organization	View 1,419 employees	🇫🇷 Provence-Alpes-Cote D’Azur\|Bouches-du-Rhone, St. Paul-lez-durance+1	$ 500-1000M	2006	2,226,525	Manufacturing, Nuclear
TechnicAtome	View 1,306 employees	🇫🇷 Essonne, Ile-de-France, Villiers-le-bâcle+12	$ 500-1000M	1972	56,028	Industrial Engineering, Nuclear
Assystem	View 6,388 employees	🇫🇷 Hauts-de-Seine, Ile-de-France, Courbevoie+64	$ 100-500M	1966	365,227	Energy, Nuclear
HEF Groupe	View 334 employees	🇫🇷 Loire, Auvergne-Rhône-Alpes, Andrézieux-bouthéon+3	$ 100-500M	1953	19,033	Nuclear
Andra	View 629 employees	🇫🇷 Hauts-de-Seine, Ile-de-France, Châtenay-malabry+9	$ 100-500M	1991	186,166	Environmental Engineering, Waste Management
Asn	View 181 employees	🇫🇷 Montrouge+1	$ 10-50M	2006	105,462	Nuclear, Environmental Engineering

1. Cnrs

Cnrs (Centre national de la recherche scientifique), headquartered in Paris, France, is a pivotal institution in the field of scientific research. Within the nuclear sector, CNRS engages in cutting-edge research and development, focusing on sustainable energy solutions and safety innovations. Their work contributes significantly to France’s leadership in nuclear technology and research, collaboratively advancing the industry with scientific insights and advancements. This profound focus on research excellence supports France’s strategic objectives in energy security and technological innovation.

Location 🇫🇷 Paris, Ile-de-France, Paris	Size View 19,358 employees
Revenue $ 500-1000M	Industries Science and Engineering, Manufacturing
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2. Orano

Orano, located in France, specializes in nuclear fuel cycle products and services. The company focuses on various aspects of the nuclear cycle, including mining, conversion, enrichment, used fuel recycling, nuclear logistics, dismantlement, and engineering. Orano’s mission is to develop value from nuclear materials while ensuring safety and environmental sustainability. With extensive research and application of nuclear technology, Orano aims to support a reliable and low-carbon energy supply, positioning itself as a key player in the global nuclear energy sector.

Location 🇫🇷 Hauts-de-Seine, Ile-de-France, Châtillon	Size View 11,708 employees
Revenue $ 500-1000M	Industries Energy, Science and Engineering, Sustainability
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5. Iter Organization

Iter Organization, located in Saint-Paul-lès-Durance, France, is at the forefront of nuclear energy research, focusing specifically on fusion technology. This key player in the nuclear sector is actively pursuing the development of the world’s largest tokamak, a magnetic fusion device designed to prove the feasibility of fusion as a large-scale and carbon-free source of energy. Iter’s groundbreaking project not only aims to provide immense amounts of clean energy but also sets new standards in international scientific collaboration, involving multiple global partners working towards shared cutting-edge scientific objectives.

Location 🇫🇷 Provence-Alpes-Cote D’Azur\|Bouches-du-Rhone, St. Paul-lez-durance	Size View 1,419 employees
Revenue $ 500-1000M	Industries Manufacturing, Science and Engineering
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6. TechnicAtome

TechnicAtome, based in France, is a pivotal player in the nuclear energy sector, specializing in the design, production, and maintenance of compact nuclear reactors for submarines, aircraft carriers, and research. Their expertise extends to both civil and military applications, providing robust solutions that support France’s strategic energy independence and national defense capabilities. As a leading innovator in nuclear technology, TechnicAtome is dedicated to advancing nuclear energy efficiency and safety, reinforcing its position in the international nuclear landscape.

Location 🇫🇷 Essonne, Ile-de-France, Villiers-le-bâcle	Size View 1,306 employees
Revenue $ 500-1000M	Industries Manufacturing, Science and Engineering
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7. Assystem

Assystem, based in France, is an international engineering group specializing in complex infrastructure projects, particularly in the nuclear sector. As a leader in engineering and project management, Assystem supports the entire lifecycle of nuclear projects, from design and construction to operation and maintenance. In France, they play a critical role in advancing the country’s nuclear energy capabilities, collaborating with major industry players to enhance safety and efficiency in nuclear energy production. Their expertise not only bolsters France’s position in the nuclear field but also supports sustainable energy development on a global scale.

Location 🇫🇷 Hauts-de-Seine, Ile-de-France, Courbevoie	Size View 6,388 employees
Revenue $ 100-500M	Industries Energy, Science and Engineering
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9. Andra

Andra, headquartered in France, plays a pivotal role in the nuclear industry by managing radioactive waste solutions. It focuses on the long-term management of all radioactive materials to ensure environmental safety and sustainability. Andra’s strategic approach emphasizes state-of-the-art waste disposal technologies, aiming to set global benchmarks in waste management safety and efficiency in the nuclear sector. Their initiatives in France are not only crucial for environmental protection but also for advancing the sustainable use of nuclear technology.

Location 🇫🇷 Hauts-de-Seine, Ile-de-France, Châtenay-malabry	Size View 629 employees
Revenue $ 100-500M	Industries Science and Engineering, Sustainability, Professional Services
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10. Asn

The Autorité de Sûreté Nucléaire (ASN), headquartered in France, is the independent French governmental body responsible for the regulation of nuclear safety and radiation protection. ASN prioritizes public health and environmental protection in the French nuclear industry and oversees everything from nuclear facility safety to waste management. As the nuclear sector evolves in France, ASN’s role is pivotal in ensuring that nuclear activities remain safe and compliant with stringent national and international regulations.

Location 🇫🇷 Montrouge	Size View 181 employees
Revenue $ 10-50M	Industries Science and Engineering, Sustainability, Professional Services
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