- Business
- Fidelis Energy, Inc. (NYSE American: FDEI) develops and commercializes modular nuclear microreactors for clean, reliable power generation targeting remote, industrial, and defense applications. The company offers the Fidelis Reactor, a transportable 100 MWe pressurized water reactor designed for rapid deployment and scalability; associated balance-of-plant systems including power conversion and cooling modules; and integrated fuel services for extended operational life without on-site refueling. Fidelis Energy operates primarily in the United States, with facilities in Charlotte, North Carolina, and focuses on customers in mining, data centers, military bases, and off-grid communities.
Founded in 2023 and headquartered in San Francisco, California, the company advanced its technology through a merger with SHLL Inc., completed in October 2025, which provided public market access and approximately $50 million in gross proceeds to accelerate development. In November 2025, Fidelis Energy announced a strategic partnership with TerraPower to co-develop advanced nuclear fuel cycles, enhancing fuel efficiency and safety profiles for its reactors. The company also launched its commercialization roadmap, targeting first deployments by 2028, and expanded its engineering team with key hires from Westinghouse and NuScale Power.