Radiant

Raised $300M in a Series D round, announced 17 December 2025.

Round

Funds R-50 factory in Oak Ridge and Kaleidos demonstration at Idaho National Laboratory.

Amount
$300M
Stage
Series D
Announced
17 December 2025
Lead
Draper Associates
Other investors
Boost VC, DCVC
Use of funds
Funds R-50 factory in Oak Ridge and Kaleidos demonstration at Idaho National Laboratory.
Checked
Announced by the company

Company

Portable nuclear microreactors (Kaleidos 1 MW) for remote power

Based in
El Segundo, United States
Sector
Climate & Energy
Website
radiantnuclear.com ↗

Sources and links

Sources
Radiant closes over $300M Series D for portable nuclear microreactors radiantnuclear.com
Radiant closes over $300M Series D for portable nuclear microreactors marketscreener.com
Website
radiantnuclear.com ↗
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