---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-26-013781"
form_type: "8-K"
ticker: "CENX"
cik: "0000949157"
company_name: "CENTURY ALUMINUM CO"
filed_at: "2026-03-03T23:59:59+00:00"
generated_at: "2026-05-15T22:29:21.421571+00:00"
event_type: "regulatory"
sentiment: "negative"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Century Aluminum restates 2023-2025 financials; changes Jamalco consolidation method

## Summary
- Audit Committee determines prior financials (FY23-24, interim periods 2024-2025) should no longer be relied upon due to Jamalco accounting change.
- Company will fully consolidate Jamalco JV (55%) instead of proportionate consolidation; no impact on Century net income.
- Restatement boosts total assets ~$180M and equity ~$143M (FY24); gross profit down ~$13M (FY24) and ~$4M (FY23).
- Company expects material weakness in internal controls over financial reporting due to restatement.
- Change follows SEC staff comment letters; audit committee reversed earlier immateriality conclusion on March 2, 2026.

## SEC filing metadata
- accession: 0001628280-26-013781
- form_type: 8-K
- ticker: CENX
- cik: 0000949157
- company_name: CENTURY ALUMINUM CO
- filed_at: 2026-03-03T23:59:59+00:00
- event_type: regulatory
- sentiment: negative
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 4.02, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/949157/000162828026013781/0001628280-26-013781-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/949157/000162828026013781/cenx-20260302.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-26-013781
- JSON: https://secwatch.observer/filing/0001628280-26-013781.json
- Plain text: https://secwatch.observer/filing/0001628280-26-013781.txt

## Source-grounded claims
- claim_id: 3f08701a4ce8aeba613bcb23333a925507e45a82
  claim: CENTURY ALUMINUM CO reported that prior financial statements should not be relied upon.
  evidence_excerpt: the Audit Committee, after discussions with senior management and the Company’s independent registered public accountants, concluded that the Company’s previously issued consolidated financial statements as of and for the fiscal years ended December 31, 2023 and December 31, 2024, and as of and for the interim periods ended March 31, 2024, June 30, 2024, September 30, 2024, March 31, 2025, June 30, 2025 and September 30, 2025 (the “Affected Financial Statements”) should no longer be relied upon as a result of the change in accounting for the Jamalco Production Assets described above and that the Affected Financial Statements should be restated.
  evidence_url: https://www.sec.gov/Archives/edgar/data/949157/000162828026013781/0001628280-26-013781-index.htm

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