Top Nuclear Energy companies
Nuclear Energy within the broader energy and utilities sector encompasses the development, operation, and decommissioning of facilities that generate electricity through nuclear reactions. This sub-sector covers a wide range of activities essential to harnessing nuclear power safely and efficiently, including the design, construction, and maintenance of nuclear power plants, as well as the development of reactor technologies such as Small Modular Reactors (SMRs), Generation III/IV reactors, and advanced instrumentation and controls. It involves managing the entire nuclear fuel cycle, from mining and conversion to enrichment and fuel fabrication, to ensure a reliable supply of nuclear fuel. The sector also addresses critical safety and regulatory compliance through rigorous licensing, safety standards, and quality assurance processes, which are vital for operational integrity and public trust. Decommissioning and site remediation activities are integral to overseeing the safe shutdown and environmental restoration of aging facilities, while spent fuel management—including storage, transportation, and reprocessing—ensures secure handling of radioactive materials. Furthermore, radioactive waste management and disposal strategies are implemented to minimize environmental impact, including the development of repositories for low, intermediate, and high-level waste. Overall, this sub-sector plays a pivotal role in advancing nuclear as a low-carbon energy source, supporting energy security, and managing the technical, environmental, and safety challenges inherent to nuclear power throughout its lifecycle.
10 companiesCompanyWebsiteHQ country
BWX TechnologiesBWX Technologies designs and manufactures nuclear reactors, TRISO and CANDU fuel, and reactor components primarily for the U.S. Navy's submarine and aircraft carrier fleet, with additional commercial nuclear, nuclear medicine, and DOE environmental management operations. FY2025 revenue: $3.2B.bwxt.comUnited States→
KBRKBR is a publicly traded science, technology, and engineering solutions provider serving U.S. federal defense and civilian agencies via Mission Technology Solutions and global commercial energy clients via Sustainable Technology Solutions, with proprietary process technologies and AI-enabled digital platforms.kbr.comUnited States→
AtkinsRéalisAtkinsRéalis is a global engineering services and nuclear technology firm delivering infrastructure, energy, defense, and transportation projects across 50+ countries, serving government agencies and enterprises with proprietary CANDU reactor licensing, digital platforms, and 40,000+ professionals.atkinsrealis.comCanada→
Westinghouse Electric CompanyWestinghouse Electric Company is a privately held U.S. nuclear technology company, owned by Brookfield (51%) and Cameco (49%), that designs, manufactures, and services AP1000 reactors, AP300 SMRs, eVinci microreactors, nuclear fuel, and operating plant services for utilities and governments worldwide.westinghousenuclear.comUnited States→
Energy FuelsEnergy Fuels is a US-based critical minerals company producing uranium, rare earth oxides, and vanadium, and building the first Western vertically integrated mine-to-magnet rare earth supply chain via the pending VAC and ASM acquisitions to serve nuclear utilities, defense contractors, and advanced technology manufacturers.energyfuels.comUnited States→
Mirion TechnologiesMirion Technologies (NYSE: MIR) provides radiation detection, measurement, and monitoring solutions for nuclear power, medical, defense, and industrial markets, serving 98% of the world's nuclear plants and 6,000 cancer centers via hardware, software, and services.mirion.comUnited States→
Camecocameco.comCanada→
FramatomeFramatome is a French, EDF-owned nuclear steam supply system designer and manufacturer providing fuel, equipment, instrumentation and control, and lifecycle services to roughly two-thirds of the world's operating nuclear reactors and adjacent defense, space, and medical applications.framatome.comUnited States→
OkloOklo designs, builds, owns, and operates Aurora small modular fast fission power plants (up to 75 MWe) sold via long-term power purchase agreements to hyperscale data centers, industrial customers, and government/defense clients, targeting first commercial power in late 2027.oklo.comUnited States→
National Nuclear Security AdministrationThe National Nuclear Security Administration is a semi-autonomous U.S. Department of Energy agency that maintains and modernizes the nation's nuclear weapons stockpile, prevents nuclear proliferation, and powers the U.S. Navy through the Nuclear Security Enterprise of laboratories, plants, and sites.nnsa.energy.govUnited States→
