Form 4 for FISN DEEP FISSION, INC.
Accepted 2025-12-12 00:00:00 ET · period of report 2025-12-09 · accession 0001104659-25-120704 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2025-12-12 | 2025-12-09 | FISN | Muller Elizabeth | CEO | A - Grant | $0.00 | +549.5K | 549.5K | New | $0 |
| D | 2025-12-12 | 2025-12-09 | FISN | Muller Elizabeth | CEO | A - Grant | $0.00 | +183.2K | 994.8K | +23% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Restricted Stock Units | 2025-12-09 | A | A | 549,451 | $0.00 | 549,451 | D | — | — | |
| 2 | Derivative | Stock Option (right to buy) | 2025-12-09 | A | A | 183,150 | $0.00 | 994,849 | D | $2.73 · — to 2035-12-09 | 183,150 shares of Common Stock | (F2) The stock options vest over four years, with 25% of the award vesting on the first anniversary of the December 9, 2025 grant date and the remaining 75% vesting in equal monthly installments thereafter, subject to the Reporting Person's continued service through each vesting date. |