NewCleo
This company is in the pipeline of America 2030, IPO CLUB’s $50M, actively managed secondary fund focused on U.S. defense, energy, security, and AI.
Updated in January 2026
Headquarter: Paris, France
Year Founded: 2021
Leadership: Stefano Buono
Industry Sectors: Nuclear energy; Advanced nuclear reactors; Small Modular Reactors (SMRs); Clean energy
Funding Round: €300M Series D (2023)
Valuation: ~€1.5B
Is NewCleo A Public Company? No, it is currently private
What is NewCleo?
Newcleo is a European nuclear energy company founded in 2021 by Stefano Buono, with headquarters in Paris and operations across France, UK, Italy, and Switzerland. The company focuses on developing a new generation of advanced nuclear reactors designed to deliver clean, reliable energy while addressing long-standing challenges around nuclear waste. Newcleo’s mission is to enable a circular nuclear economy by producing power that is safer, more sustainable, and capable of reusing existing spent nuclear fuel.
Technology & Products
Newcleo is developing lead-cooled fast reactors (LFRs), a class of Generation IV nuclear reactors that use liquid lead as a coolant and operate with fast neutrons. This design enhances passive safety, reduces the risk of overheating, and allows reactors to consume recycled nuclear waste as fuel. The company’s roadmap includes small modular reactors (SMRs) for industrial and grid applications, as well as fuel recycling capabilities that convert existing spent fuel into usable energy. By integrating reactor design with fuel cycle management, Newcleo aims to deliver a closed-loop nuclear system with lower long-term environmental impact.
Market Opportunity
Newcleo operates in the growing advanced nuclear and clean energy market, driven by global demand for low-carbon, baseload power to support electrification and energy security. Its technology targets utilities, industrial energy users, and governments seeking alternatives to fossil fuels that complement intermittent renewables such as wind and solar. With many countries extending nuclear lifetimes and exploring next-generation reactors, Newcleo positions itself to benefit from policy support for energy independence, decarbonization, and waste reduction, particularly in Europe.
Competitive Landscape
Newcleo competes within the advanced reactor and SMR ecosystem, alongside other nuclear innovators developing fast reactors, molten salt reactors, and light-water SMRs. Its key differentiation is the combination of lead-cooled fast reactor technology and integrated waste recycling, which directly addresses nuclear waste liabilities while enhancing fuel efficiency. While competitors may focus primarily on power generation or modular deployment, Newcleo emphasizes a full-system approach that links energy production with long-term waste management.
How To Buy NewCleo Stock?
NewCleo is currently a private company and is not publicly traded on major stock exchanges like the NASDAQ or NYSE. This means you can buy shares through a pre-IPO platform or brokerage like IPO CLUB.
Courtesy of NewCleo
This company is in the pipeline of America 2030, IPO CLUB’s $50M, actively managed secondary fund focused on U.S. defense, energy, security, and AI.
Introducing NewCleo
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Comprehensive SMR investment analysis comparing Last Energy, Radiant, and Newcleo for private market investors. Last Energy leads with $32B commercial agreements, UK regulatory approval, and 2026 deployment timeline. Radiant secured $225M funding with DOE partnerships. Newcleo targets European markets with €535M raised. Includes funding comparison, risk assessment, and investment recommendations for the rapidly growing small modular reactor sector.