---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-120071"
form_type: "8-K"
ticker: "FISN"
cik: "0001918102"
company_name: "DEEP FISSION, INC."
filed_at: "2025-12-11T23:59:59+00:00"
generated_at: "2026-05-16T13:33:01.179451+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Deep Fission CEO Elizabeth Muller receives new compensation package with $475K salary, equity grants

## Summary
- Annual base salary of $475,000; target performance bonus of 50% of salary.
- Equity awards: option for 183,150 shares and 549,451 RSUs, vesting over 4 years with 1-year cliff.
- Eligibility confirmed under Executive Severance and Change in Control Policy.
- Compensation Committee approved; employment remains at-will.

## SEC filing metadata
- accession: 0001104659-25-120071
- form_type: 8-K
- ticker: FISN
- cik: 0001918102
- company_name: DEEP FISSION, INC.
- filed_at: 2025-12-11T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 5.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1918102/000110465925120071/0001104659-25-120071-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1918102/000110465925120071/tm2533117d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-120071
- JSON: https://secwatch.observer/filing/0001104659-25-120071.json
- Plain text: https://secwatch.observer/filing/0001104659-25-120071.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.