Deep Fission, Inc.

Snapshot

Deep Fission is a pre-revenue nuclear developer with $0 in FY 2025 revenue and a $61.0M net loss. It holds $93.0M in cash against essentially no debt, and Signal8 models roughly 14.4 months of runway.

What's Happening Right Now

• Thu 10th Sep '26 · Milestone: On Sep 10, 2026, Deep Fission installed and retrieved a full-scale prototype reactor canister from a test borehole using standard commercial drilling equipment, without needing custom-built gear.
• Wed 19th Aug '26 · Target date: On Aug 19, 2026, CEO Liz Muller said Deep Fission aims to begin commercial electricity generation from its first underground reactor in Kansas by the end of 2027, contingent on construction and regulatory approval.
• Thu 6th Aug '26 · Regulatory: On Aug 6, 2026, the Department of Energy approved Deep Fission's Nuclear Safety Design Agreement for its Gravity reactor, a milestone toward demonstration and commercial deployment at its Kansas pilot site.
• Wed 24th Jun '26 · Customer pipeline: On Jun 24, 2026, Deep Fission announced non-binding Letters of Intent representing up to 18.5 gigawatts of potential generation capacity with data centers and industrial partners, though these carry no purchase or financing commitment.
• Mon 22nd Jun '26 · Stock offering: On Jun 22, 2026, Deep Fission closed a public offering of 2.5 million shares at $16.00 each, raising $40 million before expenses for engineering and construction of its Kansas pilot reactor.