Deep Fission, a pioneering advanced nuclear energy company placing small modular pressurized water reactors (SMRs) in boreholes one mile underground, announced today it has raised $80 million in new financing.

Investors included Ed Eisler of EE Holdings and Mark Tompkins of Montrose Capital, who led the Company's previous financing round in September 2025.

Deep Fission is revolutionizing the energy landscape with innovative technology that places a small modular pressurized water reactor in a borehole one mile underground. Founded and led by a team of seasoned scientists, engineers, and entrepreneurs, the company is committed to delivering safe, reliable, and affordable low-carbon power at scale. Deep Fission was selected for the Department of Energy's Reactor Pilot Program and is building its first reactor in Parsons Kansas.