El Segundo, United States
Radiant, a trailblazing energy startup, is committed to Making Nuclear Power Portable. The company is on a mission to revolutionize the energy sector with the development of the world’s first mass-produced portable nuclear microreactors.
Founded in 2020 and headquartered in the United States, Radiant has engineered its flagship reactor, Kaleidos, a 1 MW failsafe microreactor designed for easy transportation to diverse locations in need of power. The company aims to conduct the first tests of its prototype in 2026, with customer deployments anticipated by 2028.
In its latest funding round on 01 December 2025, Radiant secured a significant $300.00M Series D investment. This round was backed by a robust roster of investors, including Boost VC, Founders Fund, Draper Associates, In-Q-Tel, Chevron Technology Ventures, Align Ventures, Ark Invest, Friends & Family Capital, Giant Ventures, Lockheed Martin's VC, StepStone Group, and Washington Harbour Partners.
As the company works towards bringing its innovative vision to fruition, it positions itself as a promising player in the Energy, Renewable Energy, Clean Energy, and Energy Efficiency sectors, potentially transforming the future of energy supply and accessibility.
