United States Clean Energy Nuclear Microreactor Startup Radiant Raised $165 Million Series C Funding, Founded in 2019 by Doug Bernauer & Bob Urberger, Investors Include DCVC, Giant Ventures, StepStone Group, Hanwha Asset Management Venture Fund, SGA Capital, Crossbeam Venture Partners, Align Ventures, ARK Venture Fund, Gigascale Capital, HartBeat Ventures, Pax Ventures, Union Square Ventures, Founders Fund, Draper Associates, Felicis, Washington Harbour Partners LP, Chevron Technology Ventures, Decisive Point, McKinley Alaska, Nucleation Capital, Boost VC & Also Capital
29th May 2025 | Hong Kong
United States clean energy nuclear microreactor startup Radiant has raised $165 million in Series C funding. Radiant was founded in 2019 by Doug Bernauer & Bob Urberger. Radiant investors include DCVC, Giant Ventures, StepStone Group, Hanwha Asset Management Venture Fund, SGA Capital, Crossbeam Venture Partners, Align Ventures, ARK Venture Fund, Gigascale Capital, HartBeat Ventures, Pax Ventures, Union Square Ventures, Founders Fund, Draper Associates, Felicis, Washington Harbour Partners LP, Chevron Technology Ventures, Decisive Point, McKinley Alaska, Nucleation Capital, Boost VC & Also Capital. Radiant – Radiant is a clean energy startup building a nuclear microreactor. A climate-friendly alternative to diesel generators, Radiant’s Kaleidos 1MW microreactor will be the world’s first portable, zero-emissions power source that works anywhere. We plan to test our development reactor by 2026 and if successful, it will be the first new commercial reactor design to achieve a fueled test in over 50 years. Our microreactor can bring power to remote parts of the world and provide backup power for life-saving applications in hospitals or disaster-relief scenarios.
“ United States Clean Energy Nuclear Microreactor Startup Radiant Raised $165 Million Series C Funding, Founded in 2019 by Doug Bernauer & Bob Urberger, Investors Include DCVC, Giant Ventures, StepStone Group, Hanwha Asset Management Venture Fund, SGA Capital, Crossbeam Venture Partners, Align Ventures, ARK Venture Fund, Gigascale Capital, HartBeat Ventures, Pax Ventures, Union Square Ventures, Founders Fund, Draper Associates, Felicis, Washington Harbour Partners LP, Chevron Technology Ventures, Decisive Point, McKinley Alaska, Nucleation Capital, Boost VC & Also Capital “
United States Clean Energy Nuclear Microreactor Startup Radiant Raised $165 Million Series C Funding, Founded in 2019 by Doug Bernauer & Bob Urberger, Investors Include DCVC, Giant Ventures, StepStone Group, Hanwha Asset Management Venture Fund, SGA Capital, Crossbeam Venture Partners, Align Ventures, ARK Venture Fund, Gigascale Capital, HartBeat Ventures, Pax Ventures, Union Square Ventures, Founders Fund, Draper Associates, Felicis, Washington Harbour Partners LP, Chevron Technology Ventures, Decisive Point, McKinley Alaska, Nucleation Capital, Boost VC & Also Capital

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