Last Energy is a U.S. nuclear technology developer focused on micro-modular pressurized-water-reactor power plants. Its commercial PWR-20 uses standard low-enriched uranium, proprietary hermetically sealed steel containment, and factory-built modular construction to produce 20 MWe per unit, under a build-own-operate and power-purchase-agreement model for industrial and data-centre customers. In May 2026, the U.S. Department of Energy approved the Preliminary Documented Safety Analysis for Last Energy's 5-MWe PWR-5 pilot at Texas A&M-RELLIS; the company describes PWR-5 as physically identical to the PWR-20 but scaled for pilot use.
Astera Institute, JAM Fund, Gigafund, Haskell Company, AE Ventures, Ultranative, Galaxy Interactive, Woori Technology