Radiant Closes $165 Million in Series C Funding
2 minute read | June.03.2025
Radiant has successfully closed a $165 million Series C funding round to advance its mission of developing mass-produced nuclear microreactors. The round was led by DCVC and includes new investments from StepStone, Giant Ventures, Hanwha Asset Management Venture Fund, SGA, Crossbeam Venture Partners, Align Ventures, ARK Venture Fund, Gigascale Capital, HartBeat Ventures, and Pax Ventures.
Orrick represented Radiant.
THE COMPANY
Radiant is building the world’s first mass-produced nuclear microreactors. The company’s first reactor, Kaleidos, is a 1 MW failsafe microreactor that can be transported anywhere power is needed. Kaleidos is designed to replace diesel generators and can be rapidly deployed to provide resilient power for remote villages, emergency response, and military installations.
Radiant plans to test its first reactor in 2026, with initial customer deployments beginning in 2028.
THE IMPACT
The Series C funding will primarily be used to complete Radiant’s Kaleidos Development Unit, and for factory siting and early construction efforts on the facilities that are expected to produce up to 50 microreactors per year. The funding announcement follows the news that the U.S. Department of Energy has selected Radiant as one of just five companies in the United States to receive high-assay low-enriched uranium (HALEU) fuel, which the company will use for the first test.
THE TEAM
Orrick’s Josh Pollick and Montana Ware led the team that advised Radiant. The team also included Laura Lariu, Kelsey Repka, Will Lorenzen and Erica Kaiser.