Companies
238 commercial organisations, plus 222 universities, laboratories, regulators and programmes, each with its sources and, where the record holds them, its devices and what those devices have measured.
Showing all 238 companies
Aalo Atomics, founded in Austin, Texas in 2023, is developing 10 MWe sodium-cooled reactors, grouped five to a 50 MWe Aalo Pod, to power data centres.
Acceleron Fusion, of Cambridge, Massachusetts, is developing muon-catalysed fusion of deuterium and tritium, with fuel it says would run at 500 to 1,000 °C rather than millions of degrees.
Air Liquide is a Paris-based industrial gases company, founded in 1902, supplying gases, equipment and services to industry and healthcare.
Rosatom subsidiary building, and set to own and operate, the four-unit Akkuyu nuclear plant in Mersin Province, Turkey.
Ampegon is a Swiss maker of high-voltage power supplies and radio-frequency amplifiers used for plasma heating at fusion devices, including ITER and Wendelstein 7-X.
Amplitude Laser Group is a French maker of femtosecond and nanosecond lasers, based in Pessac, including high-energy systems for laser fusion research.
Anderson Dahlen is a Minnesota fabricator of custom equipment and stainless steel components, with a division making ultra-high-vacuum products.
Antares Nuclear develops factory-produced microreactors; its R1 design is cooled by sodium heat pipes and fuelled with TRISO particles.
Anubal Fusion is an Indian startup pursuing laser-driven inertial-confinement proton-boron fusion.
US company founded in 2006 developing the ARC-100, a 100 MWe sodium-cooled fast reactor based on the EBR-II, with licensing work in Canada and the US.
ASG Superconductors is a Genoa maker of superconducting magnets that has built toroidal field coils for ITER and coils for JT-60SA and Wendelstein 7-X.
ASP Isotopes enriches isotopes for medicine and semiconductors using aerodynamic and laser methods, and through Quantum Leap Energy aims to enrich HALEU and lithium-6.
Astral Systems is a Bristol-area company, founded in 2021, developing a compact fusion neutron source to produce medical radioisotopes.
Montreal engineering and construction group, formerly SNC-Lavalin, which owns the CANDU heavy-water reactor technology through its subsidiary Candu Energy.
Atlas Copco is a Swedish maker of compressors and vacuum equipment, including the Edwards and Leybold vacuum brands.
Atomic Acquisitions is a UK-focused developer, financier and consultancy for nuclear power projects.
Avalanche Energy is a Seattle-based company developing the Orbitron, a compact fusion machine in which ions are electrostatically confined in orbits around a charged cathode.
Swiss energy group in Baden, owned by north-eastern Swiss cantons, which operates the Beznau nuclear plant, Switzerland's first.
Be4FUSION is a California consultancy on beryllium and other specialty materials for fusion, fission and optical systems.
Bechtel is a US engineering and construction company, founded in 1898, that has built nuclear power plants and US nuclear waste treatment facilities.
Indian government company set up in 2003 under the Department of Atomic Energy to build and operate fast breeder reactors, starting with the 500 MWe Prototype Fast Breeder Reactor at Kalpakkam.
Blue Laser Fusion, founded in 2022 by Nobel laureate Shuji Nakamura, is developing pulsed lasers for laser fusion power and directed-energy defence.
Blykalla is a Stockholm company, spun out of KTH in 2013, developing SEALER, a small lead-cooled reactor, with an electrical prototype at Oskarshamn.
Breakthrough Energy Ventures is the clean-energy investment fund founded by Bill Gates's Breakthrough Energy, with stakes in fusion companies including Commonwealth Fusion Systems.
Bruce Power operates the eight-reactor Bruce nuclear station on Lake Huron, which supplies about 30% of Ontario's electricity.
Bruker is a US scientific-instrument maker, founded in Germany in 1960, whose products include magnetic resonance spectrometers, and which has a superconductor division.
BWX Technologies builds US Navy reactors and makes nuclear fuel, components and medical isotopes, and is designing the BANR gas-cooled microreactor.
French company of the Gorgé industrial group developing a small, low-pressure water reactor of 30 MW of heat to supply district heating networks.
Cameco is a Saskatoon uranium miner and fuel-services company that also owns 49% of Westinghouse and of Global Laser Enrichment.
Centrus Energy supplies enriched uranium and, at Piketon, Ohio, runs the first US cascade licensed to produce high-assay low-enriched uranium.
ČEZ is the majority state-owned Czech utility that operates the Dukovany and Temelín nuclear plants and owns 20% of Rolls-Royce SMR.
China General Nuclear Power Group is a Chinese state-owned nuclear power operator, running plants including Daya Bay, and co-developer of the Hualong One reactor.
One of China's five largest state-owned power generators, and a partner with Tsinghua University and CNNC in building the HTR-PM pebble-bed high-temperature gas-cooled reactor demonstration plant.
Japanese utility for the Chubu region around Nagoya, owner of the Hamaoka nuclear plant, and an affiliate member of the Fusion Industry Association.
Japanese regional utility for the Chugoku region, trading as Energia, which operates the Shimane nuclear power plant.
China National Nuclear Corporation is China's state nuclear group, covering fuel, reactor design and operation, and developer of the Hualong One and the ACP100 small reactor.
Coherent Corp., formerly II-VI, is a US maker of lasers, optical materials and semiconductors.
Commonwealth Fusion Systems, an MIT spin-off founded in 2018, is building the SPARC high-field superconducting tokamak in Devens, Massachusetts, and plans the ARC power plant in Virginia.
Compact Fusion Systems is a US company listed by the IAEA in 2022 as planning a magnetised target fusion device, Fusion Power Core.
Constellation Energy is a Baltimore-based US power generator whose plants include nuclear stations and the planned restart of a Three Mile Island reactor for Microsoft.
Copenhagen Atomics is a Danish developer of small thorium molten-salt reactors that plans its first critical experiment at the Paul Scherrer Institute no earlier than 2028.
CORE POWER is a London company developing ship-based and floating nuclear power by integrating other companies' reactors, such as Westinghouse's eVinci.
Cosylab is a Ljubljana company that builds control-system software and electronics for accelerators, fusion experiments and radiation therapy systems.
Crossfield Fusion is a UK company that dropped its Epicyclotron reactor in 2021 after finding it would not scale, and now explores hydrogen isotope separation for fusion fuel.
Cryomagnetics is an Oak Ridge, Tennessee maker of superconducting magnets and cryogenic equipment, founded in 1983.
CTFusion was a University of Washington spin-out developing spheromak fusion; it wound down in February 2023, according to its chief executive.
Washington, DC company developing NuCycle, a process for recycling spent nuclear fuel to close the fuel cycle.
Deep Fission, founded in Berkeley in 2023, is developing small pressurised water reactors to sit a mile underground in boreholes, with a pilot site in Parsons, Kansas.
Denison Mines is a Canadian uranium company developing the Wheeler River project in Saskatchewan's Athabasca Basin.
Deutelio AG is a Swiss company in Manno, Ticino, registered to research and develop nuclear and plasma technologies.
Dominion Energy is a Richmond, Virginia utility that runs the North Anna, Surry, Millstone and V.C. Summer nuclear stations and has agreed to merge into NextEra Energy.
South Korean heavy industry company in Changwon that manufactures reactor vessels, steam generators and other large nuclear components, and is supplying equipment for the SMART and NuScale small reactors.
Dual Fluid is developing a reactor that uses two circulating fluids, one carrying the fuel and the other extracting the heat, instead of fuel rods.
US electric and gas utility headquartered in Charlotte, North Carolina, whose nuclear plants supply about half of its generation in the Carolinas.
France's state-owned electricity company, created in 1946, which operates the French nuclear fleet, builds EPR reactors in France and Britain and owns the NUWARD small reactor subsidiary.
Belgian power company, a subsidiary of Engie, which owns the Doel and Tihange nuclear power plants.
Electric Fusion Systems is a US company proposing a portable fusion generator based on an unconventional lithium Rydberg-matter fuel.
Brazil's state-controlled nuclear generator, created in 1997, which runs Angra 1 and 2 at Angra dos Reis and is building Angra 3.
Elysium Industries is listed as a US developer of a molten chloride salt fast reactor; no activity has been found since about 2020.
The United Arab Emirates' state nuclear company, established by decree in 2009, which owns the four-unit Barakah plant of Korean APR1400 reactors.
Ukraine's state nuclear generator, founded in 1996, which runs the country's four nuclear power plants, including Zaporizhzhia, under Russian military occupation since March 2022.
Energy Fuels is a US uranium producer that runs the White Mesa uranium mill in Utah and is expanding into rare earth elements.
Company founded in 1985 to develop the Polywell, a fusion concept combining an electrostatic potential well with a cusp magnetic field, now also pursuing neutron sources.
Public power agency in Richland, Washington, formed in 1957 as the Washington Public Power Supply System, which operates the Columbia Generating Station nuclear plant.
Energy Singularity is a Shanghai fusion company that built HH70, an all-high-temperature-superconducting tokamak, first run in June 2024.
Eni is an Italian energy major and an early, repeated investor in Commonwealth Fusion Systems, from its first funding in 2018 to a 2025 power-purchase deal.
ENN is a Chinese energy group whose research arm runs the EXL-50U spherical tokamak to study hydrogen–boron fusion.
US utility in New Orleans serving the Gulf South, which operates nuclear plants including Arkansas Nuclear One, Grand Gulf, River Bend and Waterford 3.
Eos Atomics is a San Francisco company building neutral particle beam systems for defence, fusion plasma heating and medical isotope production.
South Africa's state-owned electricity utility, founded in 1923, which operates Koeberg, the only nuclear power station in Africa.
Japanese start-up developing laser fusion energy, which also sells laser processing services built on the same optical technology.
Fusion start-up headquartered in Aix-en-Provence, France, designing a compact negative-triangularity tokamak with actively cooled copper magnets.
First Light Fusion develops projectile-driven inertial fusion technology and, since March 2025, has focused on commercialising its amplifier technology with partners rather than building its own power plant.
Huntsville, Alabama company founded in 2011 developing the liquid-fluoride thorium reactor (LFTR), a graphite-moderated molten salt reactor fuelled with thorium.
US engineering and construction company, founded in 1912, that took a majority stake in the small modular reactor developer NuScale in 2011.
Laser fusion company based in Darmstadt, Germany, launched in 2021 to turn National Ignition Facility-style laser fusion with deuterium–tritium fuel into a power plant.
Finnish state-owned energy company in Espoo that owns the Loviisa nuclear plant and stakes in the Olkiluoto, Forsmark and Oskarshamn plants.
French nuclear reactor designer and fuel supplier, majority owned by EDF, whose designs include the EPR.
Japanese cable and electronics maker, founded in 1885, that makes rare-earth high-temperature superconducting wire and markets it for fusion magnets.
US company building pulsed-power drivers for magnetised liner inertial fusion, which also sells pulsed-power testing to defence customers.
Joint venture of Kyoto Fusioneering and Canadian Nuclear Laboratories developing fusion fuel-cycle technology through the UNITY-2 project.
Maker of fast avalanche-photodiode cameras and data acquisition units for plasma diagnostics, including a pellet diagnostic designed for ITER.
Gauss Fusion is a German venture founded by European industrial companies to develop stellarator fusion power plants.
US–Japanese nuclear alliance formed in 2007 that designs boiling water reactors, including the BWRX-300 small modular reactor, and supplies fuel and services.
General Atomics is a San Diego defence and technology company that runs the DIII-D tokamak for the US Department of Energy, is building ITER's Central Solenoid magnet and has designed fission reactors.
Canadian company, founded in 2002, developing magnetised target fusion, in which a plasma is compressed mechanically; it is testing the approach on its LM26 machine.
US start-up developing uranium enrichment to produce low-enriched and high-assay low-enriched uranium (HALEU) reactor fuel domestically.
French laser fusion start-up spun off from Thales, founded in 2024, working with CNRS and CEA laboratories on inertial confinement fusion.
US technology company that invests in fusion and has agreed to buy power from Commonwealth Fusion Systems’ first plant and from Kairos Power reactors.
US company founded in 2024 developing the Halo, a 10 MWe light-water micro modular reactor. It became public on Nasdaq (HDRN) in 2026 through a merger with GigCapital7.
Sydney-based company developing laser-driven fusion of hydrogen and boron-11 using a scheme it calls proton fast ignition.
Tokyo start-up developing a helical-type (stellarator) fusion reactor, drawing on research at Japan’s National Institute for Fusion Science.
Pasadena-based start-up developing a pulsed fusion engine, the Helicity Drive, for spacecraft propulsion and power.
US company in Everett, Washington, building pulsed fusion machines that aim to recover electricity directly; Microsoft has agreed to buy power from its first plant.
French start-up, launched in 2023 with support from CEA, designing a small sodium-cooled fast reactor with heat storage to supply electricity and industrial heat.
Chengdu fusion company founded in December 2022 developing a linear field-reversed configuration device, and planning neutron-source products before power.
Japanese boiling water reactor maker in Hitachi, Ibaraki, set up in 2007 by Hitachi and GE; the Japanese side of the alliance behind the BWRX-300. Named Hitachi-GE Nuclear Energy until June 2025.
US nuclear company, founded in 1986, that makes spent fuel storage systems, decommissions shut reactors and is developing the SMR-300 reactor.
US company developing a hybrid fusion device that combines inertial electrostatic heating with magnetic cusp confinement, using deuterium fuel at first.
Indian start-up in Hyderabad developing what it calls lattice confinement fusion, nuclear reactions in hydrogen-loaded metal, for compact heat and power systems.
US company that planned PJMIF, a device to study pulsed fusion driven by imploding plasma liners.
Spanish utility in Bilbao that operates, alone or with partners, five Spanish nuclear plants including Almaraz, Trillo and Cofrentes.
US laser fusion company building on the National Ignition Facility’s ignition result, with a modular laser made of about a thousand smaller lasers.
US company, founded in 2010, working on laser fusion with krypton fluoride lasers and on manufacturing targets for inertial fusion.
Japanese company set up to launch commercial nuclear power, jointly owned by the major utilities, which owns the Tokai and Tsuruga nuclear plants.
Japanese steelmaker founded in 1907 in Muroran, Hokkaido, one of the few forges able to make the largest single-piece reactor pressure vessel components.
UK maker of radiation detection instruments and radiation shielding for the nuclear, medical and defence sectors, trading since 1975.
French start-up designing small high-temperature gas-cooled reactors that supply heat, not electricity, to industrial sites.
US company, founded in 2016, developing a salt-cooled reactor with solid TRISO pebble fuel; its Hermes test reactor is under construction in Oak Ridge, Tennessee.
Japanese utility for the Kansai region around Osaka and Kyoto, historically the most nuclear-reliant in Japan, with plants at Mihama, Takahama and Ohi.
Kazakhstan’s state-controlled uranium company, which supplied over 40% of the world’s primary uranium in 2019, all by in-situ recovery.
South Korean power plant design and engineering company, a KEPCO subsidiary founded in 1975, which helped develop the APR-1400 reactor and designs the BANDI small reactor for floating plants.
Toronto-based engineering, testing and inspection firm for power utilities and the nuclear industry, now owned by BWX Technologies.
South Korea's state nuclear and hydroelectric generator, a KEPCO subsidiary headquartered in Gyeongju, which runs the country's nuclear power plants and co-develops the i-SMR small modular reactor.
Bulgarian state company that runs the Kozloduy nuclear power plant, the country's only one, with two operating pressurised water reactors; AP1000 Units 7 and 8 are proposed.
Japanese fusion engineering company, founded in 2019, that develops plant technology such as fuel-cycle systems for other fusion developers.
UK reseller of photonics products and fibre-network test equipment.
US company developing the PWR-20, a 20 MWe factory-built pressurised water reactor, which it plans to build, own and operate for industrial customers.
US defence electronics contractor, majority owned by Italy’s Leonardo, listed as an affiliate member of the Fusion Industry Association.
Fusion start-up that says its machines are engineered in New Mexico; its website gives little detail of its approach.
Nasdaq-listed US company in Reston, Virginia, developing Lightbridge Fuel, a nuclear fuel design for existing and new water-cooled reactors.
Swiss subsidiary of Linde plc that designs and builds helium and hydrogen liquefiers and cryogenic refrigeration plants.
Tokyo start-up founded in 2023 developing a hydrogen-boron (p-B11) fusion reactor that combines a field-reversed configuration with magnetic mirrors and high-energy particle beams.
Livermore, California company founded by former National Ignition Facility leaders to design a laser inertial fusion power plant; it says it plans a first 500 MWe plant in 2033.
New Jersey company developing the dense plasma focus, a pulsed pinch device, with the aim of burning hydrogen-boron fuel; its Focus Fusion-1 device first operated in 2009.
US company listed by the IAEA as operator of a planned Z-pinch device named MIFTI; its website is a placeholder page.
San Francisco company, co-founded in 2023, developing fusion fuel-cycle technology: tritium pumping, lithium enrichment and isotope production.
San Francisco start-up designing a compact tokamak with high-temperature superconducting magnets to power ships and off-grid sites; it targets first deployment in 2032.
Munich-based laser-driven inertial fusion developer, founded in 2019, building the ATLAS laser facility with Colorado State University.
Houston manufacturer of high-temperature superconducting tape (Xeus wire) for fusion magnets and power cables; it opened its first commercial line in 2024.
US software company that has agreed to buy power from Helion's planned first fusion plant (2023) and from the restarted Three Mile Island Unit 1 fission reactor (2024).
Japanese engineering group whose nuclear business designed the Mitsubishi APWR and co-developed the ATMEA1 reactor with Areva; it took a stake in Framatome in 2017.
Developer of the Stable Salt Reactor Wasteburner and the WATSS fuel-recycling process; its UK parent is in administration and Nuclea Energy agreed in August 2026 to buy the technology.
Hungarian power group, owner of the Paks nuclear plant, which is building two VVER-1200 reactors at Paks with Rosatom.
French company that designed the XAMR, a small fast-spectrum molten salt reactor fuelled with plutonium chloride. It went into liquidation in January 2026.
Nasdaq-listed New York microreactor developer whose lead design, the KRONOS MMR gas-cooled reactor, came from its 2025 purchase of Ultra Safe Nuclear Corporation's technology.
Abilene, Texas developer of molten salt reactors; its MSR-1 research reactor at Abilene Christian University received an NRC construction permit in September 2024.
New Brunswick's provincial Crown utility, operator of the 660 MW Point Lepreau CANDU-6 nuclear station.
Chantilly, Virginia company developing Magnetized Target Impact Fusion, a pulsed approach using a railgun-type launcher; it raises money through equity crowdfunding.
Paris-headquartered developer of small lead-cooled fast reactors (LFR-AS-30 and LFR-AS-200), founded in 2021; it aims to build a first 30 MWe unit near Chinon by 2031.
Vancouver-based uranium miner developing the Rook I project and Arrow deposit in Saskatchewan's Athabasca Basin.
Florida-based US utility group, parent of Florida Power & Light, that owns nuclear plants and agreed in May 2026 to acquire Dominion Energy.
Stockholm company, founded in 2019, developing the NOVATRON magnetic mirror fusion device at KTH Royal Institute of Technology.
India's state-owned nuclear power company, created in 1987, which had 24 reactors (8,180 MWe) in operation as of February 2026.
Israeli developer of a pulsed compact stellarator, the Tao Core, for a 20 MWe on-site fusion unit it calls the Tao Energy Box.
Romania's majority state-owned nuclear generator, which runs the two CANDU reactors at Cernavodă, makes CANDU fuel at Pitești and is developing Cernavodă Units 3 and 4.
Argentina's state nuclear generator, which operates the Atucha I, Atucha II and Embalse nuclear power plants.
US designer of small modular pressurised water reactors whose modules hold NRC design certification (2023) and standard design approval (2025); no plant has been built.
EDF's subsidiary dedicated to developing the NUWARD small modular reactor. EDF dropped the first twin-reactor design in July 2024 and is redesigning around existing technology.
Italian maker of power supplies and radio-frequency systems for fusion experiments and accelerators, including equipment for JT-60SA and ITER.
Rosatom's reactor design bureau in Nizhny Novgorod, designer of Russia's naval and icebreaker reactors and of the KLT-40S and RITM-200 small reactors.
Santa Clara, California developer of the Aurora sodium-cooled fast reactor; its first licence application was denied in 2022, and it began site work at Idaho National Laboratory in 2025.
Ontario's government-owned power producer, operator of the Pickering and Darlington nuclear stations, licensed in April 2025 to construct a BWRX-300 small modular reactor at Darlington.
Wellington, New Zealand company developing a levitated dipole fusion device; its first machine, Marsden, produced plasma in November 2024.
Vilnius, Lithuania maker of damage-resistant laser optics with ion-beam-sputtered coatings, including large optics for laser fusion.
French state-majority-owned nuclear fuel-cycle company, formed from Areva and renamed Orano in 2018, covering uranium mining, conversion, enrichment and recycling.
Polish company planning a fleet of GE Vernova Hitachi BWRX-300 small modular reactors to replace coal plants and supply industry and district heating.
French start-up founded in 2024 in Aix-en-Provence developing a modular sodium-cooled fast reactor for combined electricity and heat.
Oxford materials and engineering company, founded in 2019, that designs and tests materials and components for fusion power plants.
California company, founded in 2023, developing pulser-driven inertial fusion; it is building its Demonstration System in Albuquerque, New Mexico.
Northern California investor-owned utility, headquartered in Oakland, which owns the Diablo Canyon nuclear power plant.
Ohio maker of nanolayered polymer films, including capacitor films for pulsed-power fusion drivers.
Ronkonkoma, New York manufacturer of diode-pumped solid-state pulsed lasers for scientific and industrial use.
Arizona utility holding company, parent of Arizona Public Service (APS), which operates and part-owns the Palo Verde nuclear generating station.
Poland's state-owned company developing the country's first large nuclear power plant, with Westinghouse AP1000 reactors at Lubiatowo-Kopalino on the Baltic coast.
Indian developer of low-aspect-ratio tokamak technology: the PRAGYA tokamak control testbed, the JENGA tokamak design and control software, and MAGGA high-temperature-superconducting magnets.
US company listed by the IAEA as operator of the planned PFRC field-reversed configuration device; its web address now redirects to Princeton Satellite Systems.
Company designing factory-built transportable nuclear power plants that house microreactors or small modular reactors from other vendors.
Munich-based developer of quasi-isodynamic (QI) stellarators with high-temperature-superconducting magnets; its first power-plant concept is called Stellaris.
Newark, New Jersey energy company whose nuclear arm operates the Salem and Hope Creek plants and co-owns Peach Bottom.
Bletchley, UK space propulsion company selling electric thrusters and hybrid rockets and developing Sunbird, a fusion rocket concept.
ASP Isotopes company developing laser and aerodynamic isotope enrichment to supply HALEU and LEU+ nuclear fuel.
El Segundo, California developer of the Kaleidos transportable gas-cooled microreactor; its development unit was shipped to Idaho National Laboratory for testing in August 2026.
Boulder, Colorado scientific computing firm that designs accelerators and builds the Sirepo browser-based simulation platform.
Madison, Wisconsin developer of magnetic mirror fusion for industrial heat and power, building on the University of Wisconsin's WHAM experiment.
Grenoble-based stellarator developer that winds simplified coils from wide high-temperature-superconducting tape and uses liquid-lithium walls to absorb neutron energy and extract heat.
Bergisch Gladbach, Germany engineering firm supplying components for ITER and other fusion and accelerator projects.
Derby-based developer of a 470 MWe factory-built pressurised water reactor, in UK Generic Design Assessment since 2022; Wylfa was chosen as its first UK site in 2025.
Russia's state nuclear corporation, established in 2007, covering power generation, enrichment, fuel, reactor design and export construction.
Rosatom's nuclear power plant operating company, which runs Russia's civil nuclear plants, including the floating plant Akademik Lomonosov.
Copenhagen developer of floating molten salt reactors (the seaMSR-100), formerly Seaborg Technologies, working with Samsung Heavy Industries and KHNP.
Mainz-based specialty glass and glass-ceramics maker, founded in 1884 and owned by the Carl Zeiss Foundation.
Shanghai manufacturer of second-generation high-temperature superconducting tape whose customers include Commonwealth Fusion Systems, Tokamak Energy, ASIPP and Energy Singularity.
Janesville, Wisconsin company using beam-target fusion neutron sources for industrial testing and medical isotope production, with fusion power as a long-term aim.
German energy equipment maker, spun off from Siemens in 2020 and renaming itself Omterra, that is Marvel Fusion's power plant partner.
French manufacturer, in Saint-Avé in Brittany, of electromagnets for particle accelerators used in research, medicine, industry and energy.
Australian company commercialising SILEX, a laser-based isotope separation technology, for uranium enrichment and for enriched silicon used in quantum computing.
Slovakia's main power generator, based in Bratislava, which operates the Bohunice and Mochovce nuclear power plants.
Atlanta-based utility holding company whose subsidiaries include Georgia Power, Alabama Power, Mississippi Power, Southern Company Gas and Southern Nuclear, which operates its nuclear plants.
Supplier of precision DC high-voltage power supplies, X-ray generators and Monoblock X-ray sources for medical, industrial and scientific applications, including custom OEM designs.
US manufacturer of TRISO particle fuel for advanced reactors, for power, defence and space uses.
Xi'an-based developer of a compact high-temperature-superconducting spherical tokamak heated by repeated magnetic reconnection; its core team comes from Tsinghua University's spherical-tokamak group.
One of China's five major state power generators, formed in 2015 by merging China Power Investment with the State Nuclear Power Technology Corporation. It developed the Guohe One reactor design.
Helsinki company developing the LDR-50, a small low-temperature, low-pressure water-cooled reactor built only to supply district heating.
Canadian fusion company, which describes itself as a Princeton University spin-off, developing a simplified stellarator through staged demonstration devices.
Grenoble-based CEA spin-off, founded in 2023, developing the Stellarium, a fast-neutron molten-salt reactor whose fuel is dissolved in the salt and can use plutonium, minor actinides and uranium recovered from spent fuel.
San Francisco-based investor in fusion energy start-ups.
US company, founded in 2005, that plans and coordinates shipments of spent nuclear fuel and other radioactive material.
Swedish nuclear services company in Nyköping, founded in 1947 as AB Atomenergi, supplying fuel analysis software, waste treatment and decommissioning, and since 2026 owner of the SMR developer Kärnfull Next.
Tokyo-based Japanese general trading company (sogo shosha), incorporated in 1919 and a member of the Sumitomo Group.
Moscow maker of high-temperature superconducting tape and equipment, including magnets for fusion plasma confinement.
Glenville, New York maker of second-generation high-temperature superconducting wire, owned by Furukawa Electric since 2012.
California company, founded in 1998 as Tri Alpha Energy, developing fusion based on the field-reversed configuration, with the long-term aim of burning hydrogen-boron fuel.
Taiwan's state-owned electric utility, headquartered in Taipei, which operated Taiwan's nuclear power plants. Its Maanshan plant's second reactor was disconnected in May 2025 when its licence expired.
US independent power producer whose fleet is anchored by the 2.5 GW Susquehanna nuclear plant in Pennsylvania, which also powers a co-located data centre campus.
Federally owned US electricity corporation, created in 1933 and based in Knoxville, Tennessee, which runs the Browns Ferry, Sequoyah and Watts Bar nuclear plants.
Finnish nuclear power company owned by energy and industrial firms, which operates the Olkiluoto plant: two boiling water reactors and the Olkiluoto 3 EPR.
Developer of centrifugal magnetic-mirror fusion, in which the plasma is rotated at high speed inside a magnetic mirror to improve stability and confinement.
Developer of SOLO, a gas-cooled micro-modular reactor of about 1 MW electric fuelled with conventional low-enriched (below 5%) uranium oxide pellets; the company targets commercial deployment in 2028.
Bellevue, Washington, company founded by Bill Gates in 2006, building the Natrium sodium-cooled fast reactor at Kemmerer, Wyoming, and producing medical isotopes.
Developer of the Integral Molten Salt Reactor (IMSR), whose uranium fuel is dissolved in the molten salt that also cools it; headquartered in Charlotte, North Carolina, and listed on Nasdaq as IMSR.
French aerospace, defence, security and electronics group, formed as Thomson-CSF in 1968 and renamed Thales in 2000.
US fusion company, founded in 2022 with technology from Princeton University, designing a stellarator whose magnetic field is shaped by arrays of flat, software-controlled magnets.
Manufacturer in Ismaning, near Munich, of second-generation (2G) high-temperature superconducting tape, sold as THEVA Pro-Line.
US-based developer of a shipyard-built molten salt reactor fuelled with uranium and thorium fluorides, with a first plant proposed in Indonesia.
Amsterdam-based developer of modular molten salt reactors for industry and data centres, designed to use material recovered from spent nuclear fuel as fuel.
Los Alamos, New Mexico, company developing plasma-based electrical transformers and fusion concepts, staffed largely by former Los Alamos National Laboratory researchers.
UK company, spun out of the UK Atomic Energy Authority in 2009, that operates the ST40 spherical tokamak and develops high-temperature superconducting magnets for fusion and other uses.
Japanese utility holding company serving the Tokyo region, operator of the Fukushima Daiichi plant at the time of the 2011 disaster, which restarted Kashiwazaki-Kariwa Unit 6 in January 2026.
Canadian company in Barrie, Ontario, that designs, builds and maintains tritium-handling systems.
Japanese electronics and engineering group whose energy business designs nuclear reactors, including the 4S small sodium-cooled fast reactor.
Subsidiary of X-energy that makes TRISO particle fuel from high-assay low-enriched uranium and is building the TX-1 fuel fabrication facility.
German family-owned maker of machine tools and industrial lasers, founded in 1923 and based in Ditzingen near Stuttgart.
Rosatom-owned nuclear fuel company in Moscow that enriches uranium and makes fuel assemblies for power and research reactors in Russia and abroad.
US fusion company founded in 2019 by stellarator researchers from the University of Wisconsin-Madison, designing the Infinity Two stellarator power plant with the Tennessee Valley Authority.
Family-owned US re-roller and distributor of precision stainless steel and special-metal strip, foil and wire, founded in 1924 in Connecticut.
US uranium mining company, listed on NYSE American, producing uranium by in-situ recovery in Wyoming and South Texas.
Uranium enrichment company headquartered in London, with centrifuge plants in the UK, the Netherlands, Germany and the US.
Urenco's stable-isotopes business, producing enriched stable isotopes such as silicon, zinc, iridium, germanium and xenon for industrial, medical and research use at its facility in the Netherlands.
US reactor developer, founded in 2023, designing a TRISO-fuelled high-temperature gas-cooled reactor to supply hydrogen, industrial heat and data-centre power.
Swedish state-owned power company, founded in 1909, which operates the Ringhals and Forsmark nuclear plants in Sweden.
French water, waste and energy services group, founded in 1853 as Compagnie Générale des Eaux, with a nuclear decommissioning and radioactive-waste business.
Texas power generator and retailer based in Irving that owns nuclear plants and has signed 20-year nuclear power agreements with Meta.
Pennsylvania-based nuclear technology company that designs reactors, including the AP1000, and supplies nuclear fuel and plant services.
Rockville, Maryland, developer of the Xe-100 pebble-bed high-temperature gas-cooled reactor and, through its subsidiary TRISO-X, of the TRISO fuel it uses.
Minneapolis-based utility that owns and operates the Monticello and Prairie Island nuclear plants in Minnesota.
Denver-based developer of laser-driven inertial fusion energy using high-energy excimer lasers.
US company developing sheared-flow-stabilised Z-pinch fusion, which since April 2026 also develops a small sodium-cooled fission reactor based on the 4S design.
Laboratories, regulators and programmes
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Abilene Christian University University · Research institute · Operator -
Applied Superconductivity Educational Foundation Consortium - Argonne National Laboratory National laboratory · Research institute · Operator
- Atomic Energy Commission of Algeria Government programme · Research institute
- Atomic Energy Commission of Syria Government programme · Regulator
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Atomic Energy of Canada Limited Government programme · Research institute - Atomic Energy Organization of Iran Government programme · Operator
- Atominstitut, TU Wien University · Operator
- Auburn University University · Operator
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Australian Nuclear Science and Technology Organisation National laboratory · Research institute · Operator - Austrian Academy of Sciences Research institute · Government programme
- Bangladesh Atomic Energy Commission Government programme · Research institute · Operator
-
BARC National laboratory · Research institute -
BME Institute of Nuclear Techniques University · Operator - Budker Institute of Nuclear Physics Research institute · Operator
- California Institute of Technology University · Research institute
- Canadian Nuclear Laboratories National laboratory · Research institute
- Canadian Nuclear Safety Commission Regulator
-
CEA National laboratory · Research institute - Central Laser Facility National laboratory · Research institute
- Centro de Desenvolvimento da Tecnologia Nuclear Government programme · Research institute · Operator
- Chalmers University of Technology University
-
Chilean Nuclear Energy Commission Government programme · Research institute · Operator - China Academy of Engineering Physics National laboratory · Research institute
- China Institute of Atomic Energy National laboratory · Research institute · Operator
- CIEMAT Research institute · Operator
- CNEA Reactor developer · Research institute · Operator
- Colombian Geological Survey Government programme · Operator
- Columbia University University · Operator
- Comenius University Bratislava University
- Consorzio RFX Research institute · Operator
- CREN-K Research institute · Operator
- Czech Technical University University · Operator
- Department of Atomic Energy Government programme
-
Dublin City University University -
Dutch Institute for Fundamental Energy Research Research institute · Operator - École Polytechnique University · Operator
- Egyptian Atomic Energy Authority Government programme · Operator
-
Electric Power Research Institute Research institute - ENEA Research institute · Operator
-
EUROfusion Consortium · Government programme - Federal University of Espírito Santo University · Operator
- Forschungszentrum Jülich National laboratory · Research institute
-
Fusion for Energy Government programme -
FUSION FOR FUTURE Consortium -
Fusion Industry Association Consortium -
Fusion Power Associates Consortium - Ghana Atomic Energy Commission Government programme · Research institute · Operator
- Great British Energy – Nuclear Government programme
- Heinz Maier-Leibnitz Research Neutron Source (FRM II) University · Operator
- Huazhong University of Science and Technology University · Operator
-
HUN-REN Energiatudományi Kutatóközpont Research institute -
HUN-REN Hungarian Research Network Research institute - Idaho National Laboratory National laboratory · Research institute · Operator
- Idaho State University University · Research institute · Operator
- Indira Gandhi Centre for Atomic Research National laboratory · Research institute · Reactor developer · Operator
-
Institut Laue-Langevin Research institute · Operator - Institute for Energy Technology Research institute
- Institute for Nuclear Research and Nuclear Energy Research institute
-
Institute for Nuclear Research Pitești Research institute - Institute for Plasma Research Research institute · Operator
-
Institute for Plasma Science and Technology Research institute - Institute of Atomic Energy of National Nuclear Center of the Republic of Kazakhstan Research institute · Operator
- Institute of Atomic Physics Government programme · Research institute
-
Institute of Nuclear and New Energy Technology, Tsinghua University Research institute · University · Reactor developer - Institute of Nuclear Physics (Kazakhstan) Research institute · Operator
- Institute of Nuclear Physics of the Academy of Sciences of Uzbekistan Research institute · Operator
- Institute of Physics and Power Engineering Research institute
- Institute of Plasma Physics Research institute · Operator
-
Institute of Plasma Physics and Laser Microfusion Research institute - Institute of Plasma Physics National Science Center Research institute · Operator
- Institute of Plasma Physics, Chinese Academy of Sciences Research institute · Operator
- Institute of Science Tokyo University · Operator
-
Institute of Solid State Physics, University of Latvia Research institute · University - Instituto de Engenharia Nuclear Government programme · Research institute · Operator
- Instituto de Pesquisas Energéticas e Nucleares Government programme · Research institute · Operator
- Instituto Superior Técnico University · Operator
- Instituto Tecnológico de Costa Rica University · Operator
- International Atomic Energy Agency Government programme · Research institute
- International Centre for Environmental and Nuclear Sciences University · Research institute · Operator
- Ioffe Institute Research institute · Operator
- Islamic Azad University University · Operator
-
ITER Organization Consortium · Operator -
JAEA National laboratory · Research institute · Reactor developer - Joint Institute for Nuclear Research Research institute · Operator
- Joint Institute for Power and Nuclear Research – Sosny Research institute
- Joint Research Centre Research institute · Government programme
-
Jordan Atomic Energy Commission Government programme · Operator - Jožef Stefan Institute National laboratory · Research institute · Operator
- KAERI Research institute · Reactor developer · Operator
- Kansas State University University · Research institute · Operator
- Karlsruhe Institute of Technology University · Research institute
-
Kindai University University · Operator - King Abdullah City for Atomic and Renewable Energy Government programme
-
Korea Institute of Fusion Energy Research institute · Operator - KTH Royal Institute of Technology University · Operator
- Kyoto Institute of Technology University · Operator
- Kyoto University University · Operator
- Kyung Hee University University · Operator
- Kyushu University University · Operator
- Laboratory for Plasma Physics, Royal Military Academy Research institute
-
Lawrence Livermore National Laboratory National laboratory · Operator -
Lithuanian Energy Institute Research institute - Lockheed Martin Operator
- Los Alamos National Laboratory National laboratory · Research institute
-
Malaysian Nuclear Agency Research institute · Operator -
Max Planck Institute for Plasma Physics Research institute · Operator - McClellan Nuclear Research Center University · Research institute · Operator
-
McMaster University University · Research institute · Operator - Missouri University of Science and Technology University · Research institute · Operator
-
MIT Nuclear Reactor Laboratory University · Research institute · Operator -
MIT Plasma Science and Fusion Center University · Research institute · Operator - Nagoya University University · Operator
- National Atomic Research Institute Research institute
- National Centre for Nuclear Research National laboratory · Research institute · Operator
-
National Centre for Scientific Research Demokritos Research institute -
National Institute for Fusion Science Research institute · Operator -
National Institute for Laser, Plasma and Radiation Physics Research institute - National Institute for Nuclear Research (Mexico) Government programme · Research institute · Operator
- National Institute for Space Research National laboratory · Operator
- National Institutes for Quantum Science and Technology National laboratory · Operator
- National Nuclear Center of the Republic of Kazakhstan National laboratory · Research institute · Operator
- National Nuclear Energy Commission (Brazil) Government programme · Research institute · Operator
-
National Nuclear Laboratory National laboratory · Research institute - National Research and Innovation Agency Government programme · Research institute
- National Research Centre Kurchatov Institute Research institute · Operator
- National Research Nuclear University MEPhI University · Operator
-
National Tsing Hua University University · Operator - NC State Nuclear Reactor Program University · Research institute · Operator
- Nigeria Atomic Energy Commission Government programme
- Nihon University University · Operator
- NIKIET Reactor developer · Research institute
-
NIST Center for Neutron Research Research institute · Operator - NRG PALLAS Research institute · Operator
-
Nuclear AMRC Research institute -
Nuclear Industry Association Consortium -
Nuclear South West Consortium -
Oak Ridge National Laboratory National laboratory · Research institute - OECD Nuclear Energy Agency Government programme
-
Office for Nuclear Regulation Regulator - Ohio State University University · Research institute · Operator
-
Oregon State University Radiation Center University · Research institute · Operator - Osaka University University · Operator
- Pacific Northwest National Laboratory National laboratory · Research institute · Operator
- Pakistan Atomic Energy Commission Government programme · Operator
- Pakistan Institute of Nuclear Science and Technology National laboratory · Research institute · Operator
-
Paul Scherrer Institute National laboratory · Research institute - Penn State Radiation Science & Engineering Center University · Research institute · Operator
- Peruvian Institute of Nuclear Energy Government programme · Research institute · Operator
- Philippine Nuclear Research Institute Research institute · Operator
-
Plasma Physics Group, Imperial College London University - Polytechnique Montréal University · Research institute · Operator
- Princeton Plasma Physics Laboratory National laboratory · Operator
-
Purdue University School of Nuclear Engineering University · Research institute · Operator - Reactor Institute Delft University · Operator
- Reed College University · Operator
-
Research Centre Řež Research institute · Operator - Research Institute of Atomic Reactors Research institute · Operator
- Royal Military College of Canada University · Operator
-
Ruđer Bošković Institute Research institute - Saint Petersburg State University University · Operator
- Sandia National Laboratories National laboratory · Operator
-
Savannah River National Laboratory National laboratory · Research institute · Operator -
SCK CEN National laboratory · Research institute · Operator - Seoul National University University · Operator
-
Shanghai Institute of Applied Physics, Chinese Academy of Sciences Research institute · Reactor developer · Operator - Soreq Nuclear Research Center Research institute · Operator
- South African Nuclear Energy Corporation National laboratory · Research institute · Operator
- Southwest Jiaotong University University · Operator
- Southwestern Institute of Physics Research institute · Operator
-
STEP Government programme - Swedish Research Council Government programme
- Swiss Plasma Center Research institute · Operator
- Tajoura Nuclear Research Centre Research institute · Operator
- Technical University of Denmark University · Operator
- Texas A&M Nuclear Engineering and Science Center University · Research institute · Operator
- Thailand Institute of Nuclear Technology Research institute · Operator
- The Aerospace Corporation Research institute
-
The Catapult Network Government programme -
The Fusion Cluster Consortium - The University of Tokyo University · Operator
- Tomsk Polytechnic University University · Operator
- Troitsk Institute for Innovation and Fusion Research Research institute · Operator
- Tsinghua University University · Operator
- Turkish Energy, Nuclear and Mineral Research Agency Government programme · Research institute
-
TWI Research institute · Supplier -
UC San Diego Center for Energy Research University · Research institute · Operator - UCLA Basic Plasma Science Facility University · Research institute · Operator
- UiT The Arctic University of Norway University
-
ÚJV Řež Research institute -
UK Atomic Energy Authority Research institute · Operator · Government programme - United States Department of Energy Government programme · Regulator
- United States Naval Research Laboratory Research institute · Operator
- University of California, Irvine University · Research institute · Operator
- University of Florida University · Research institute · Operator
- University of Hyogo University · Operator
- University of Illinois University · Operator
- University of Malta University
- University of Maryland, College Park University · Research institute · Operator
- University of Massachusetts Lowell University · Research institute · Operator
- University of Michigan Nuclear Engineering and Radiological Sciences University · Research institute · Operator
- University of Missouri Research Reactor University · Research institute · Operator
- University of Nevada University · Operator
- University of Rochester Laboratory for Laser Energetics University · Operator
- University of São Paulo University · Operator
- University of Saskatchewan University · Operator
- University of Science and Technology of China University · Operator
- University of Seville University · Operator
- University of Stuttgart University · Operator
- University of Tartu University
- University of Texas at Austin University · Research institute · Operator
- University of Tsukuba University · Operator
- University of Utah Nuclear Engineering Program University · Research institute · Operator
- University of Washington University · Research institute
- University of Wisconsin-Madison University · Operator
-
Uppsala University University -
US Fusion Energy Consortium -
US Nuclear Regulatory Commission Regulator - Vietnam Atomic Energy Institute Research institute · Operator
-
Vinča Institute of Nuclear Sciences Research institute - VTT Technical Research Centre of Finland Research institute
-
Washington State University Nuclear Science Center University · Research institute · Operator
Awaiting classification (17)
Found automatically and captured, but not yet classified. They carry no claim about what they do, and are excluded from every sector listing and count above — an explicit “not looked at yet” is true, where a guessed sector would not be.
- Amentum
- Analysis and Measurement Services Corporation
- Dominion Engineering, Inc.
- Equilibrion
- Fissionaire
- FuseNet
- Fusion Energy Insights
- GA Intelligence
- GA PrecisionTech Europe GmbH
- GA-Synopta
- Global Laser Enrichment
- Paragon Energy Solutions
- Savannah River Nuclear Solutions
- South West Nuclear Hub
- WANO
- Woodruff Scientific
- World Nuclear Association