---
schema_version: "secwatch.filing_event.v1"
accession: "0000949157-21-000128"
form_type: "8-K"
ticker: "CENX"
cik: "0000949157"
company_name: "CENTURY ALUMINUM CO"
filed_at: "2021-11-03T23:59:59+00:00"
generated_at: "2026-06-28T14:48:19.751961+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Century Aluminum posts Q3 net loss of $52.4M, adjusted EBITDA jumps to $70.3M

## Summary
- Net sales $581.4M in Q3 2021; shipments 196,095 tonnes.
- Net loss $52.4M ($0.58 diluted EPS) vs Q2 net loss $35.1M ($0.39 loss).
- Adjusted EBITDA of $70.3M, up from $33.9M in Q2.
- Announced casthouse expansion in Iceland to produce 150,000 tonnes of green billet.
- Restart at Mt. Holly and Hawesville smelters on track.

## SEC filing metadata
- accession: 0000949157-21-000128
- form_type: 8-K
- ticker: CENX
- cik: 0000949157
- company_name: CENTURY ALUMINUM CO
- filed_at: 2021-11-03T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 2.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/949157/000094915721000128/0000949157-21-000128-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/949157/000094915721000128/cenx-20211103.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000949157-21-000128
- JSON: https://secwatch.observer/filing/0000949157-21-000128.json
- Plain text: https://secwatch.observer/filing/0000949157-21-000128.txt

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