Form 4 for FISN DEEP FISSION, INC.
Accepted 2025-09-08 00:00:00 ET · period of report 2025-09-05 · accession 0001213900-25-085417 · 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025-09-08 | 2025-09-05 | FISN | Tompkins Mark N. | See Remarks | J - Other | $0.00 | -2.83M | 1.89M | -60% | $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 | Common Stock | 2025-09-05 | J | D | 2,833,333 | $0.00 | 1,891,667 | D | — | — | (F1) As a condition under the terms of an Agreement and Plan of Merger and Reorganization, dated as of September 5, 2025, and pursuant to the terms of a stock cancellation agreement, the reporting person voluntarily surrendered and cancelled for no consideration 2,833,333 shares of Issuer's common stock prior to the consummation of the Merger on September 5, 2025. The reporting person resigned as a director of the Issuer upon consummation of the Merger. |