OwnershipPublicly listed · Nasdaq: FISNSEC EDGAR company record and tickers file (Nasdaq: FISN) · checked Nov 11, 2026
Commercial developmentNot yet assessedWe only state a stage once a source supports it. Having a product on sale does not show it works or makes money.
Investment accessVerified public listingListed as Nasdaq: FISN, per the SEC's company tickers file. A listing means shares trade publicly; it says nothing about whether they are a good investment.Source · checked Nov 11, 2026
Evidence is labelled on each development below (company-reported, regulatory filing or government record), not on the company as a whole. Next scheduled recheck: Dec 11, 2026.
5developments published
—US federal obligations on record
3private-offering notices since 2019
Oct 20, 2026latest development
Timeline
- Oct 20, 2026 · Company announcement
Deep Fission Signs Binding 25-Year Master Energy Purchase Agreement for Planned Commercial Project
Company-reported - Sep 21, 2026 · Company announcement
Deep Fission and Youngquist Brothers Announce Collaboration on Deep, Large-Diameter Borehole Drilling for Underground Nuclear Reactor Deployment
Company-reported - Feb 18, 2026 · Private financing (Form D)
Deep Fission reports $80 million of securities sold in a private offering
Regulatory filing - Sep 24, 2025 · Private financing (Form D)
Deep Fission files notice of a private offering
Regulatory filing - Sep 23, 2025 · Private financing (Form D)
Deep Fission reports $30 million of securities sold in a private offering
Regulatory filing
Profile
- Legal name
- DEEP FISSION, INC.
- Listing
- Nasdaq FISN
- SEC filer
- CIK 0001918102 ↗
- SEC industry code
- Electric Services
- Incorporated
- DE
- Coverage
- Filings + federal awards
Mix of developments
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Follow this companyPreview a sample digestPrivate offerings reported to the SEC (Form D)
A Form D is a notice a company files after selling securities without a public registration. Amount sold is cumulative for that offering as reported by the company; an amendment (D/A) updates an earlier notice, so rows are not added together. None of these is a valuation or an open offer.