# Deep Fission, Inc.: Form S-1, filed Sep 22, 2025

- Company: [Deep Fission, Inc.](/companies/fisn.md) (CIK 1918102)
- Form: S-1
- Filed: 2025-09-22
- Accepted by EDGAR: Sep 22, 2025, 11:38 ET
- Period: not reported
- Accession: 0001213900-25-089735
- Inline XBRL: yes
- Main document: https://www.sec.gov/Archives/edgar/data/1918102/000121390025089735/ea0257750-s1_deep.htm
- All documents and exhibits: https://www.sec.gov/Archives/edgar/data/1918102/000121390025089735/

## Sections

Sections are extracted only from 10-K and 10-Q reports. Read this filing’s documents on sec.gov. https://www.sec.gov/Archives/edgar/data/1918102/000121390025089735/ea0257750-s1_deep.htm

Filed Sep 22, 2025.
Source: SEC EDGAR, the filing index for accession 0001213900-25-089735. Last ingested by Listed: Nov 4, 2026, 19:30 ET. No prices; not investment advice.