---
schema_version: "secwatch.filing_event.v1"
accession: "0000949157-23-000074"
form_type: "8-K"
ticker: "CENX"
cik: "0000949157"
company_name: "CENTURY ALUMINUM CO"
filed_at: "2023-12-19T23:59:59+00:00"
generated_at: "2026-06-07T11:03:49.774292+00:00"
event_type: "regulatory"
sentiment: "positive"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "medium"
source: SEC EDGAR
---

# Century Aluminum discusses proposed Section 45X regs, expects positive tax credit impact

## Summary
- Investor call on Dec 19, 2023 covered U.S. Treasury's proposed regs for Inflation Reduction Act Section 45X.
- Company expects the 45X Advanced Manufacturing Tax Credit to benefit its operations.
- Presentation furnished as Exhibit 99.1 details potential impact, but no specific financial projections disclosed in filing.

## SEC filing metadata
- accession: 0000949157-23-000074
- form_type: 8-K
- ticker: CENX
- cik: 0000949157
- company_name: CENTURY ALUMINUM CO
- filed_at: 2023-12-19T23:59:59+00:00
- event_type: regulatory
- sentiment: positive
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: medium
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/949157/000094915723000074/0000949157-23-000074-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/949157/000094915723000074/cenx-20231219.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000949157-23-000074
- JSON: https://secwatch.observer/filing/0000949157-23-000074.json
- Plain text: https://secwatch.observer/filing/0000949157-23-000074.txt

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