secwatch.observer — SEC 8-K summary
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Issuer:     DEEP FISSION, INC. (FISN)
CIK:        0001918102
Form:       8-K
Filed at:   2026-02-25T23:59:59+00:00
Accession:  0001104659-26-019327
Event type: leadership
Sentiment:  neutral
Materiality: 0.50
Item codes: 5.02
LLM model:  deepseek-v4-flash:cloud@v2

Deep Fission appoints Chief Nuclear Officer; CEO receives $380K bonus
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- Mark Pérès appointed Chief Nuclear Officer effective Feb 19, 2026; base salary $300,000, target bonus 30%, 25,000 RSUs with service- and liquidity-based vesting.
- CEO Elizabeth Muller's target bonus raised from 50% to 100% of base salary for FY2026; one-time cash bonus of $380,000 paid in January 2026.
- CFO Mark Schmitz base salary increased from $250,000 to $300,000 effective Feb 1, 2026; bonus target unchanged at 30%.
- Pérès previously VP of Engineering at Deep Fission since Oct 2024; prior VP of Engineering at Kairos Power and Executive Project Director at Fluor.

Source:
  EDGAR index:    https://www.sec.gov/Archives/edgar/data/1918102/000110465926019327/0001104659-26-019327-index.htm
  Primary doc:    https://www.sec.gov/Archives/edgar/data/1918102/000110465926019327/tm267068d1_8k.htm
  HTML page:      https://secwatch.observer/filing/0001104659-26-019327

License: Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer