Xcimer

Xcimer is a clean energy company developing high-energy laser technology to enable commercial inertial fusion energy systems. The company focuses on building advanced laser systems that couple plasma physics and fusion confinement concepts with lower-cost, higher-energy laser architectures capable of scaling to commercial power generation. Xcimer’s approach builds on decades of proven inertial confinement fusion science from national laboratories, aiming to achieve net energy gain and deliver baseload electricity without carbon emissions or long-lived radioactive waste. The company targets the nuclear fusion energy sector, specifically the inertial confinement approach, as a pathway to abundant, clean power. Founded in 2021 and headquartered in Redwood City, California, Xcimer has raised approximately $100 million in Series A funding. Investors include the U.S. Department of Energy, Hedosophia, Breakthrough Energy, Lowercarbon Capital, Prelude Ventures, Emerson Collective, Gigascale Capital, Starlight Ventures, Wireframe Ventures, and Leitmotif.