---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-23-056583"
form_type: "8-K"
ticker: "CENX"
cik: "0000949157"
company_name: "CENTURY ALUMINUM CO"
filed_at: "2023-05-05T23:59:59+00:00"
generated_at: "2026-06-15T19:05:43.003634+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Century Aluminum acquires Noble's 55% Jamalco stake for $1

## Summary
- Acquired Noble Group's 55% interest in Jamalco JV (bauxite mining and alumina refining) via purchase of General Alumina Holdings for US$1.00.
- Transaction effective May 2, 2023; Century subsidiary Century Aluminum Jamaica Holdings entered into Share Sale and Purchase Agreement.
- Jamalco JV is in Jamaica; acquisition secures Century control over key upstream assets: bauxite and alumina.
- Previously announced deal now definitive; representations, warranties, and covenants in the agreement are standard.
- Consideration of $1 reflects distressed asset conditions or assumed liabilities; no specific debt assumed disclosed.

## SEC filing metadata
- accession: 0001104659-23-056583
- form_type: 8-K
- ticker: CENX
- cik: 0000949157
- company_name: CENTURY ALUMINUM CO
- filed_at: 2023-05-05T23:59:59+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/949157/000110465923056583/0001104659-23-056583-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/949157/000110465923056583/tm2314483d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-23-056583
- JSON: https://secwatch.observer/filing/0001104659-23-056583.json
- Plain text: https://secwatch.observer/filing/0001104659-23-056583.txt

## Key facts
- Material Agreements
  CENTURY ALUMINUM CO entered into Share Sale and Purchase Agreement with Noble New Asset Intermediate Co Limited, Noble Group Holdings and Noble Resources International Pte. Ltd. valued at US$1.00 (effective 2023-05-02).
  - Action: entry
  - Agreement: asset purchase
  - Counterparty: Noble New Asset Intermediate Co Limited, Noble Group Holdings and Noble Resources International Pte. Ltd.
  - Value: US$1.00
  - Effective: 2023-05-02
  source text: Effective May 2, 2023, in connection with the consummation of the Jamalco Transaction, Century Aluminum Jamaica Holdings, Inc., a wholly-owned subsidiary of Century, entered into that certain Share Sale and Purchase Agreement (the “ Purchase Agreement ”) with Noble New Asset Intermediate Co Limited (“ Seller ”), Noble Group Holdings and Noble Resources International Pte. Ltd., pursuant to which it acquired all the outstanding share capital of General Alumina Holdings Limited, a subsidiary of Seller and the holder of Noble’s 55% interest in Jamalco , for US$1.00.
  evidence_url: https://www.sec.gov/Archives/edgar/data/949157/000110465923056583/0001104659-23-056583-index.htm

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