---
schema_version: "secwatch.filing_event.v1"
accession: "0000949157-21-000129"
form_type: "8-K"
ticker: "CENX"
cik: "0000949157"
company_name: "CENTURY ALUMINUM CO"
filed_at: "2021-11-03T23:59:59+00:00"
generated_at: "2026-06-28T14:48:18.448531+00:00"
event_type: "other_material"
sentiment: "positive"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Century Aluminum announces $120M casthouse expansion for low-carbon billet production in Iceland

## Summary
- New billet casthouse at Grundartangi with 150,000 tonnes capacity; expected production start Q1 2024.
- Investment of $120 million; will create approximately 90 jobs.
- Primary foundry alloys capacity to double from 60,000 to 120,000 tonnes, replacing standard ingot.
- Project fully financed via green financing from Arion Bank (up to $130M term facility).
- Expected to produce low-carbon Natur-Al™ billet with <1/4 industry average CO₂ footprint.

## SEC filing metadata
- accession: 0000949157-21-000129
- form_type: 8-K
- ticker: CENX
- cik: 0000949157
- company_name: CENTURY ALUMINUM CO
- filed_at: 2021-11-03T23:59:59+00:00
- event_type: other_material
- sentiment: positive
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 1.01, 2.03, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/949157/000094915721000129/0000949157-21-000129-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/949157/000094915721000129/cenx-20211102.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000949157-21-000129
- JSON: https://secwatch.observer/filing/0000949157-21-000129.json
- Plain text: https://secwatch.observer/filing/0000949157-21-000129.txt

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