Schedule 13G ownership disclosure
DEEP FISSION INC
Common Stock, par value $0.0001 per share · CUSIP: 243927100
Event date: 2026-09-30
- Filing-level shares
- 2,026,767.00
- Percent of class
- 3.4%
- Tompkins Mark N.
Shares: 2,026,767.00 · Class: 3.4%
Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.
Source: SEC EDGAR filingFiling metadata
- Accession number
- 0001213900-26-120051
- Form type
- SCHEDULE 13G/A
- Filer
- DEEP FISSION, INC.
- CIK
- CIK 1918102
- Filed
- Nov 13, 2026
- Reporting period
- Sep 30, 2026
- Description
- Schedule 13G beneficial ownership