Deep Fission completes borehole demo with Youngquist; targets 2027 deployment

DEEP FISSION, INC.

Collaborated with drilling contractor Youngquist Brothers to evaluate/test deep, large-diameter borehole drilling for underground reactor deployment.
On Sept 3, 2026, in Fort Myers FL, Deep Fission lowered and retrieved its 30-inch full-size prototype reactor canister into a 34-inch borehole to ~100 ft.
Youngquist has drilled large-diameter boreholes to depths >8,000 ft since 1971; partnership applies that expertise to Deep Fission's Gravity™ reactor model.
Company targets commercial deployment as early as 2027; collaboration to continue on drilling and testing.

This headline and bullets were generated automatically by deepseek-v4-flash:cloud@v2 from the public filing. Read the source on SEC.gov before relying on any specific claim. Not investment advice. See methodology for how this pipeline works.