SEC Form 4 · accession 0001104659-26-087133
DEEP FISSION, INC. · FISN
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Jonathon Angell
Director
Period of report
Jul 23, 2026
Accepted (ET)
Jul 27, 2026 · 5:00 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001918102
Table I — non-derivative securities
No Table I lines on this filing.
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitF1 | $0.00 | Jul 23, 2026 | A | 16,973 | A | — | — | Common Stock | 16,973 | 16,973 | D |
Explanation of responses
- F1Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock upon vesting. The units vest on July 20, 2027, provided the holder continues to provide service through the vesting date.