Deep Fission Prototype Reactor Canister Arrives at Kansas Site, Advancing Reactor Proof-of-Concept Program

PARSONS, Kan., July 07, 2026--Deep Fission, Inc. (Nasdaq: FISN) ("Deep Fission" or the "Company"), an advanced nuclear energy company developing small modular pressurized water reactors installed one mile underground, today announced the arrival of its prototype reactor canister at its Parsons, Kansas site, marking a key milestone in the Company’s Proof-of-Concept Well program and its Gravity Nuclear Reactor™ development. In celebration of this milestone and its listing on the Nasdaq Stock Marke