---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-25-123840"
form_type: "8-K"
ticker: "FISN"
cik: "0001918102"
company_name: "DEEP FISSION, INC."
filed_at: "2025-12-22T23:59:59+00:00"
generated_at: "2026-05-16T12:28:01.891643+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Deep Fission appoints two independent directors, adopts insider trading policy

## Summary
- Board expanded to five members; Blake E. Janover (Class I) and Thomas S. Glanville (Class II) appointed effective Dec 19, 2025.
- Janover to serve on Audit and Nominating & Governance Committees; Glanville to chair Audit and serve on Compensation Committee.
- Existing director Leslie Goldman-Tepper added to Audit Committee.
- Board adopted an Insider Trading Policy covering directors, officers, employees, consultants, with trading blackouts and pre-clearance requirements.
- Both new directors determined independent under Nasdaq standards; no related-party transactions disclosed.

## SEC filing metadata
- accession: 0001104659-25-123840
- form_type: 8-K
- ticker: FISN
- cik: 0001918102
- company_name: DEEP FISSION, INC.
- filed_at: 2025-12-22T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 5.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1918102/000110465925123840/0001104659-25-123840-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1918102/000110465925123840/tm2533770d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-25-123840
- JSON: https://secwatch.observer/filing/0001104659-25-123840.json
- Plain text: https://secwatch.observer/filing/0001104659-25-123840.txt

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