Raised
Private and public equity. Never added to federal money.
- 2026-06$40M gross at $16/share, scaled back from a ~$156M roadshow targetIPO / listing · Nasdaq (FISN)Source ↗
Deep Fission
Developer of a deep-borehole test reactor selected for DOE's pilot pathway.
Deployment stage3 / 8Development
Race position
Megawatts at their strongest documented state, as of 2026-08-06.
DesignGravity Reactor
Per unit15 MWe
LaneMicroreactor
ListingNasdaq: FISN
NRC pre-application material describes 45 MWt producing up to 15 MWe; 2025 press describes 15 MWt / 5 MWe.
No executed megawatts · announced pipeline only
One gigawatt is 67 × 15 MWe units. No megawatts rest on an executed action yet.
Why this company is on the board: DOE Reactor Pilot Program selection with a sited pilot project at Parsons, Kansas. Source ↗
Funding
Three frames, never added together.
Awarded
Federal awards and cost share. A ceiling, not cash received.
No awarded money on record.
Borrowed
Debt, repayable. Never counted as a raise, federal or private.
No borrowed money on record.
Filed, not raised
A registration filed with the SEC. The filing itself raises nothing.
No filed, not raised money on record.
Cash on hand
A balance, not a raise. Reported by the company at a stated date.
No reported cash position on record.
Licensing
Applications, permits and authorizations, naming the authority in each case.
Nothing on record in this lane as of 2026-08-06.
Physical progress
Work at a site. Criticalities are proof the physics works, not electricity.
- 2026-07An unfuelled prototype reactor canister arrived at the Parsons, Kansas site for installation testingTest program · Company-reportedSource ↗
Program selections and agreements
Being chosen for a program, or signing one. Neither is a permit nor work at a site.
Nothing on record in this lane as of 2026-08-06.
Design proof outside the U.S.
Real progress on the same design abroad. Contributes 0 MWe to the U.S. race.
Nothing on record in this lane as of 2026-08-06.
Pipeline
Executed first. Announcements are labeled as announcements and never added to them.
Backed by an executed action
No executed megawatts on record as of 2026-08-06.
Announced, non-binding
- 2025-012,000 MWeEndeavour Energy · partnership to co-develop capacity for a data-centre portfolio, first reactors stated 2029 · Company-reportedSource ↗
Company-stated targets
What the company says, printed beside what a regulator has documented. The site never averages a target into a prediction.
- Date not statedFirst commercial underground reactor operating at Parsons, Kansas by 2027 or 2028Documented state today: No executed megawatts · announced pipeline onlyTarget source ↗
TechnologyDeep-borehole reactor
Reactor classesExperimental / unclassified · Microreactor
Tracked projects1
Highest deployment stage3 · Development
Primary sourceDOE Reactor Pilot Program roster ↗