Several companies are actively involved in the broader nuclear energy sector, including advanced nuclear fission technologies like Small Modular Reactors (SMRs) and microreactors. While direct publicly traded pure-play nuclear fusion companies are less common, some entities are contributing to the necessary supply chains or are involved in related advanced nuclear research.
Here are some companies and their involvement in the advanced nuclear space:
- NANO Nuclear Energy Inc. (NASDAQ: NNE): This company is focused on developing portable microreactor technologies, including the KRONOS MMR™ Energy System, ZEUS™ solid core battery reactor, and LOKI MMR™ for space applications. NANO Nuclear also has subsidiaries working on High-Assay, Low-Enriched Uranium (HALEU) fuel fabrication and transportation, aiming for a vertically integrated nuclear fuel business.1
- Hadron Energy, Inc. (to be listed on a US national exchange under "HDRN"): Hadron specializes in Micro Modular Reactor (MMR) development, design, and research, utilizing light water reactor technology. They are going public via a business combination with GigCapital7 Corp.2
- ONE Nuclear Energy LLC (to be listed on Nasdaq under "ONEN"): This company is an independent developer of large-scale energy solutions powered by natural gas and advanced nuclear SMR technologies. They plan to develop both gas generation capacity and advanced nuclear SMR capacity.3
- ASP Isotopes Inc. (NASDAQ: ASPI): While primarily focused on isotope production for medical and industrial uses, ASP Isotopes is developing "Quantum Enrichment" technology that they believe could efficiently produce HALEU for next-generation advanced nuclear reactors like SMRs. The company also notes that Lithium-6, which they could potentially produce, is a key emerging supply chain for nuclear fusion power.4
- Cadre Holdings Inc. (NYSE: CDRE): Through its Cadre Nuclear Group, this company provides services and products across the full nuclear lifecycle, including environmental management, national security, and nuclear energy support. Their offerings include containers, robotics, and monitoring tools for nuclear cleanup, as well as solutions for extending existing nuclear fleets and deploying SMRs.5
- US Nuclear Corp (OTC: UCLE): This company designs and manufactures nuclear radiation detection and safety equipment, serving various sectors including homeland security, national laboratories, and the nuclear power industry.6
It's important to differentiate between nuclear fission (which SMRs and microreactors utilize) and nuclear fusion. While many companies are advancing fission technologies, the commercialization of nuclear fusion is still largely in the research and development phase, with many private companies aiming for prototype devices in the 2030s.4
