---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-070122"
form_type: "8-K"
ticker: "HNRG"
cik: "0000788965"
company_name: "HALLADOR ENERGY CO"
filed_at: "2026-06-03T20:30:28+00:00"
generated_at: "2026-06-03T20:55:43.182054+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Hallador subsidiary receives MSHA imminent danger order at Oaktown mine

## Summary
- On May 28, 2026, Sunrise Coal received an MSHA imminent danger order (Section 107(a)) at Oaktown Fuels Mine No. 1 (MSHA ID 12-02394).
- Allegation: an independent contractor employee climbed onto a truck bed without fall protection. No injuries occurred.
- No Sunrise Coal employees were affected, and mine production was not interrupted.
- Sunrise Coal disputes the order, attributing the condition solely to the independent contractor, and reserves the right to contest it.

## SEC filing metadata
- accession: 0001104659-26-070122
- form_type: 8-K
- ticker: HNRG
- cik: 0000788965
- company_name: HALLADOR ENERGY CO
- filed_at: 2026-06-03T20:30:28+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 1.04
- EDGAR index: https://www.sec.gov/Archives/edgar/data/788965/000110465926070122/0001104659-26-070122-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/788965/000110465926070122/hnrg-20260528x8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-070122
- JSON: https://secwatch.observer/filing/0001104659-26-070122.json
- Plain text: https://secwatch.observer/filing/0001104659-26-070122.txt

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