Another day, another nine-figure round for a nuclear startup. Radiant Nuclear said today that it has raised more than $300 million, just one day after Last Energy said it had raised $100 million.

This is read by an automated voice. Please report any issues or inconsistencies here. Radiant, an El Segundo nuclear energy startup, raised $300 million less than six months since closing their Series ...

EL SEGUNDO, CALIFORNIA / ACCESS Newswire / December 17, 2025 / Radiant, a pioneer in portable, mass-produced nuclear microreactors, today announced that it has raised more than $300 million in a new ...