---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-22-073515"
form_type: "8-K"
ticker: "CENX"
cik: "0000949157"
company_name: "CENTURY ALUMINUM CO"
filed_at: "2022-06-22T23:59:59+00:00"
generated_at: "2026-06-25T00:11:34.492215+00:00"
event_type: "other_material"
sentiment: "negative"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Century Aluminum to idle Hawesville smelter for 9-12 months due to tripled energy costs

## Summary
- Idling process begins June 27, 2022; expects restart when energy prices normalize in ~9-12 months.
- Hawesville is the largest U.S. Century smelter and largest North American producer of military-grade aluminum.
- Over 600 employees receive WARN Act notice of temporary layoff; company to assist with unemployment and training.
- Energy costs have more than tripled historical average, driven by Russian war in Ukraine; no other plants affected.
- CEO Jesse Gary cites unprecedented energy price rise as cause for the temporary curtailment.

## SEC filing metadata
- accession: 0001104659-22-073515
- form_type: 8-K
- ticker: CENX
- cik: 0000949157
- company_name: CENTURY ALUMINUM CO
- filed_at: 2022-06-22T23:59:59+00:00
- event_type: other_material
- sentiment: negative
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/949157/000110465922073515/0001104659-22-073515-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/949157/000110465922073515/tm2219060d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-22-073515
- JSON: https://secwatch.observer/filing/0001104659-22-073515.json
- Plain text: https://secwatch.observer/filing/0001104659-22-073515.txt

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