Nuclear Startup Radiant Raises $165 Million for Micro-Reactor

May 28, 2025, 12:00 PM UTC

Radiant Industries Inc., a US nuclear startup, lined up $165 million in funding to complete its small reactor design.

The Series C funding round was led by DCVC Management Co., and also included Giant Ventures Global and StepStone Group Inc., according to a statement. The El Segundo, California-based company said it now has raised $225 million to develop its 1-megawatt system.

Rendering of the Radiant Kaleidos microreactor.
Source: US Department of Energy

Radiant’s Kaleidos micro-reactor is aimed at replacing diesel generators at military sites, remote villages or disaster relief efforts, and can operate for several years without refueling. It can be delivered in a single standardized shipping ...

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