Newcleo

Paris, France
Active
LFR

Company overview

Founded
2021
Total funding
€645M+ total (€124M+ in 2025 alone)
Technology
LFR — Lead-cooled Fast Reactor

About

Newcleo develops advanced modular reactors and an integrated nuclear-fuel business covering reactor design, research and development, engineering, procurement and construction services, and MOX-fuel manufacturing. Its technology focus is Generation IV lead-cooled fast reactors using mixed-oxide fuel made from reprocessed nuclear materials, with the stated objective of closing the fuel cycle and reducing waste liabilities. On 10 August 2026, Newcleo and NewHold Investment Corp. III announced in an SEC-filed release that the SEC had declared effective Newcleo's Form F-4 registration statement for their proposed business combination and Nasdaq listing, subject to shareholder approval and customary closing conditions.

Key investors

Multiple private investors, institutional investors

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