Muller Elizabeth 4
4 · DEEP FISSION, INC. · Filed Dec 12, 2025
Insider Transaction Report
Form 4
Muller Elizabeth
DirectorPresident and Chief Executive
Transactions
- Award
Restricted Stock Units
2025-12-09+549,451→ 549,451 total - Award
Stock Option (right to buy)
2025-12-09+183,150→ 994,849 totalExercise: $2.73Exp: 2035-12-09→ shares of Common Stock (183,150 underlying)
Footnotes (2)
- [F1]Each restricted stock unit represents the contingent right to receive one share of the Issuer's common stock upon vesting. The units 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. Restricted stock units do not have an expiration date.
- [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.