Deep Fission, Inc. FISN

Company Overview

Deep Fission, Inc. (FISN) is a nuclear energy technology company focused on developing underground small modular reactor (SMR) systems designed to operate deep below the Earth’s surface. Publicly available information indicates the company is pursuing a model that combines advanced nuclear reactor technology with deep borehole engineering in an effort to reduce construction costs, improve safety characteristics, and simplify reactor siting relative to conventional large-scale nuclear facilities. The company operates within the broader nuclear energy, advanced reactor, and clean energy infrastructure sectors.

The company’s primary strategic focus appears to center on deploying pressurized water reactor technology in deep underground environments using existing drilling and well-engineering techniques adapted from the oil and gas industry. Available public materials describe potential target customers as electric utilities, industrial energy users, and data center operators seeking carbon-free baseload electricity. Deep Fission has positioned itself around the concept of modular underground deployment, emphasizing passive safety potential, lower land usage, and reduced surface infrastructure requirements. Public historical information indicates the company was founded in the early 2020s by executives and engineers with backgrounds in energy, technology, and nuclear operations. Data regarding historical revenue generation, commercial-scale deployments, or long-term operating performance remains limited based on available public sources.