---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-25-094685"
form_type: "8-K"
ticker: "DBHL"
cik: "0001918080"
company_name: "Deep Isolation Nuclear, Inc."
filed_at: "2025-10-01T23:59:59+00:00"
generated_at: "2026-05-17T05:08:47.352229+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Deep Isolation appoints Christa Steele to board, restarts Bulgarian spent nuclear fuel feasibility study

## Summary
- Board expanded from 5 to 7 directors; Christa Steele appointed effective Sept 25, 2025.
- Steele received 32,500 RSUs ($97,500) and 10,833 stock options, both at $3.00/share.
- USTDA-funded feasibility study for deep borehole disposal of Bulgarian spent nuclear fuel restarted after review confirmed alignment with administration priorities.
- Study examines technical, regulatory, economic factors for disposal of Soviet-era spent fuel, vitrified waste, and future fuel.

## SEC filing metadata
- accession: 0001213900-25-094685
- form_type: 8-K
- ticker: DBHL
- cik: 0001918080
- company_name: Deep Isolation Nuclear, Inc.
- filed_at: 2025-10-01T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1918080/000121390025094685/0001213900-25-094685-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1918080/000121390025094685/ea0259659-8k_deep.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-25-094685
- JSON: https://secwatch.observer/filing/0001213900-25-094685.json
- Plain text: https://secwatch.observer/filing/0001213900-25-094685.txt

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