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Deep Fission and Youngquist Brothers Announce Collaboration on Deep, Large-Diameter Borehole Drilling for Underground Nuclear Reactor Deployment

Business Wire | Sep 21, 2026 7:30 AM EDT

FORT MYERS, Fla.--(BUSINESS WIRE)--Deep Fission, Inc. (Nasdaq: FISN) (“Deep Fission” or the “Company”), an advanced nuclear energy company working to place small modular pressurized water reactors (SMRs) in boreholes approximately one mile underground, today announced a collaboration with Youngquist Brothers, LLC ("Youngquist"), a commercial drilling contractor specializing in large-diameter boreholes, to evaluate and test drilling technologies for Deep Fission's underground reactor deployment

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