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Deep Fission SEC Filings

NASDAQ: FISNUtilitiesElectric Utilities: CentralUSD

4.45-0.21 (-4.51%)

At close: Oct 9, 4:00 PM ET · Delayed 15 min

Deep Fission filing overview

This page lists 60 recent SEC filings by Deep Fission (FISN), including 25 4, 15 8-K, 5 S-1/A, 3 10-Q. The latest annual report (10-K) was filed on Apr 15, 2026 for the period ending Dec 31, 2025. The most recent quarterly report (10-Q) was filed on Aug 3, 2026.

The latest current report (8-K), used to disclose material events such as earnings releases and executive changes, was filed on Sep 21, 2026. Form 10-K is the audited annual report, 10-Q the quarterly report, 8-K covers material events, and Form 4 reports insider transactions. All documents link directly to SEC EDGAR.

Summary generated from market data by MetaCap's automated system. Methodology

FISN SEC filings

Deep Fission SEC filings
FiledFormDescriptionDocument
Sep 21, 20268-KRegulation FD DisclosureView on EDGAR
Aug 3, 202610-QQuarterly reportView on EDGAR
Jul 29, 20268-KOther EventsView on EDGAR
Jul 27, 20264OWNERSHIP DOCUMENTView on EDGAR
Jul 27, 20264OWNERSHIP DOCUMENTView on EDGAR
Jul 27, 20264OWNERSHIP DOCUMENTView on EDGAR
Jul 27, 20264OWNERSHIP DOCUMENTView on EDGAR
Jul 17, 20268-KDeparture or Appointment of Directors or Officers; Compensatory Arrangements; Submission of Matters to a Vote of Security HoldersView on EDGAR
Jun 22, 20268-KOther EventsView on EDGAR
Jun 18, 2026424B4ProspectusView on EDGAR
Jun 17, 2026DEF 14ADefinitive proxy statementView on EDGAR
Jun 10, 2026S-1/ARegistration statement (amendment)View on EDGAR
May 20, 2026S-1Registration statementView on EDGAR
May 15, 2026SCHEDULE 13G/ABeneficial ownership report (passive) (amendment)View on EDGAR
May 8, 202610-QQuarterly reportView on EDGAR
May 1, 2026424B3ProspectusView on EDGAR
May 1, 2026424B3ProspectusView on EDGAR
Apr 22, 20268-KRegulation FD DisclosureView on EDGAR
Apr 21, 2026S-1/ARegistration statement (amendment)View on EDGAR
Apr 15, 202610-KAnnual reportView on EDGAR
Apr 9, 20268-KNon-Reliance on Previously Issued Financial Statements or a Related Audit ReportView on EDGAR
Mar 10, 20264OWNERSHIP DOCUMENTView on EDGAR
Mar 10, 20264OWNERSHIP DOCUMENTView on EDGAR
Mar 10, 20264OWNERSHIP DOCUMENTView on EDGAR
Mar 10, 20264OWNERSHIP DOCUMENTView on EDGAR
Mar 10, 20264OWNERSHIP DOCUMENTView on EDGAR
Mar 10, 20264OWNERSHIP DOCUMENTView on EDGAR
Mar 10, 20264OWNERSHIP DOCUMENTView on EDGAR
Mar 10, 20264OWNERSHIP DOCUMENTView on EDGAR
Mar 10, 20264OWNERSHIP DOCUMENTView on EDGAR
Mar 10, 20264OWNERSHIP DOCUMENTView on EDGAR
Mar 5, 20268-KChanges in Registrant's Certifying AccountantView on EDGAR
Feb 25, 20268-KDeparture or Appointment of Directors or Officers; Compensatory ArrangementsView on EDGAR
Feb 24, 20264OWNERSHIP DOCUMENTView on EDGAR
Feb 23, 20264OWNERSHIP DOCUMENTView on EDGAR
Feb 23, 20264OWNERSHIP DOCUMENTView on EDGAR
Feb 23, 20264Statement of changes in beneficial ownershipView on EDGAR
Feb 17, 2026S-1Registration statementView on EDGAR
Feb 10, 20268-KEntry into a Material Definitive Agreement; Unregistered Sales of Equity Securities; Regulation FD Disclosure; Other EventsView on EDGAR
Feb 10, 2026424B3ProspectusView on EDGAR
Feb 6, 2026424B5ProspectusView on EDGAR
Jan 27, 2026S-1/ARegistration statement (amendment)View on EDGAR
Jan 7, 20264OWNERSHIP DOCUMENTView on EDGAR
Dec 30, 2025S-1/ARegistration statement (amendment)View on EDGAR
Dec 23, 20254OWNERSHIP DOCUMENTView on EDGAR
Dec 22, 20254OWNERSHIP DOCUMENTView on EDGAR
Dec 22, 20258-KDeparture or Appointment of Directors or Officers; Compensatory Arrangements; Other EventsView on EDGAR
Dec 12, 20254OWNERSHIP DOCUMENTView on EDGAR
Dec 11, 20258-KDeparture or Appointment of Directors or Officers; Compensatory ArrangementsView on EDGAR
Dec 4, 20254OWNERSHIP DOCUMENTView on EDGAR
Dec 4, 20258-KRegulation FD DisclosureView on EDGAR
Dec 1, 2025S-1/ARegistration statement (amendment)View on EDGAR
Nov 21, 20258-KEntry into a Material Definitive AgreementView on EDGAR
Nov 17, 20254OWNERSHIP DOCUMENTView on EDGAR
Nov 14, 202510-QQuarterly reportView on EDGAR
Nov 14, 20254OWNERSHIP DOCUMENTView on EDGAR
Nov 14, 2025SCHEDULE 13G/ABeneficial ownership report (passive) (amendment)View on EDGAR
Nov 12, 20258-KDeparture or Appointment of Directors or Officers; Compensatory ArrangementsView on EDGAR
Nov 7, 20258-KRegulation FD DisclosureView on EDGAR
Nov 3, 2025SCHEDULE 13GBeneficial ownership report (passive)View on EDGAR

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