Deep Fission, Inc.
Profile
Deep Fission is developing the Gravity reactor, a pressurised-water SMR targeted at up to 15 MWe that is lowered into a 30-inch borehole about one mile deep. It became an SEC-reporting company through a September 2025 reverse merger with Surfside Acquisition Inc. (US$30 million raised at US$3 per share, TechCrunch 8 Sep 2025), but its 2025 Form 10-K lists no exchange or trading symbol and its 1 May 2026 prospectus states it has applied for OTCQB quotation with no public market yet; 56,207,422 shares were outstanding at 31 Mar 2026. Its first project at Parsons, Kansas (DOE Reactor Pilot Program) broke ground in December 2025 and has drilled a 6,000 ft data-acquisition well; full-power operation is targeted for H1 2027 per the SMR projects dataset.
Source: Deep Fission Form 10-K FY2025 and 424B3 (1 May 2026) via SEC EDGAR; TechCrunch 8 Sep 2025; data/smr_projects.csv, 9 Oct 2026 · confidence highKey projects
| Project | Country | Stage | Note | Map |
|---|---|---|---|---|
| Deep Fission Gravity (borehole PWR, 15 MWe) - Parsons, Kansas (underground borehole ~1 mile deep) | USA | Under construction | Regulator stage as of 9 Oct 2026: Groundbreaking Dec 2025; 6,000-ft test well drilled; DOE safety approvals not reported as of 2 Jul 2026 | open on the map |
Deals
No deal recorded for this company (as of 9 Oct 2026). All deals.
Documents
| Document | Type | Date |
|---|---|---|
| Deep Fission, Inc. Form 10-K for fiscal year 2025 | Filing | 2026 |
| Deep Fission, Inc. prospectus (Form 424B3) | Filing | 1 May 2026 |
| TechCrunch: Nuclear startup Deep Fission goes public in a curious SPAC | News | 8 Sep 2025 |
Chart
- Market cap, USD
- n/a · public reporting, unlisted
- Market cap, local
- n/a · public reporting, unlisted