Radiant Industries
Developing portable, mass-produced nuclear microreactors for zero-emissions off-grid power.
Clean Tech
📍 El Segundo, CA
Founded 2020
Current Valuation
$1.8B
as of 2025-Q4
UNICORN
Radiant Industries is an advanced nuclear technology company building mass-produced, portable nuclear microreactors to replace diesel generators. Their flagship 1.2 MW Kaleidos reactor is designed to be easily transportable in a shipping container and provides five years of emissions-free power for remote or disaster-stricken locations.
Company Profile
Last Round
Series D — $269M (Dec 2025) · Lead: Draper Associates
Founders & Key People
Doug BernauerBob Urberger
Investors
Draper Associates · Boost VC · DCVC · Andreessen Horowitz · Union Square Ventures · Tribe Capital · Decisive Point · Vinod Khosla
Products
- Kaleidos microreactor
- R-50 Factory
- Portable 1 MW reactor
- Defense power systems
- Disaster relief power
Competitors
X-energy · Oklo · NuScale · Last Energy · Westinghouse eVinci
NuclearMicroreactorSMRClean EnergyPortable Power
Private-company numbers are not real-time. Reflects publicly disclosed valuations from press releases, news reports, and tender offers as of 2025-Q4. Refreshed quarterly.