EntityWire/Illinois business entity search →/CENTURY ALUMINUM COMPANY
Employer with a benefit plan
CENTURY ALUMINUM COMPANY
CENTURY ALUMINUM COMPANY's Employer Identification Number (EIN) is 13-3070826.
At a glance
- EIN
- 13-3070826 · 133070826
- Legal name
- CENTURY ALUMINUM COMPANY
- Address on file
- 1 SOUTH WACKER DRIVE, SUITE 1000, CHICAGO, IL 60606
- Records show
- SEC filer; employer with a benefit plan
- Latest record
- 2026-08-07
SEC records
SEC EDGAR company filings · records as of 2026-08-07
- SEC CIK
- 0000949157
- Source: SEC · as of 2026-08-07
- Industry (SIC)
- Primary Production of Aluminum (3334)
- Source: SEC · as of 2026-08-07
- State of incorporation
- DE
- Source: SEC · as of 2026-08-07
- Ticker
- CENX
- Source: SEC · as of 2026-08-07
- Latest SEC filing
- SCHEDULE 13G 2026-08-07
- Source: SEC · as of 2026-08-07
Benefit plans
DOL Form 5500 filings (EFAST2) · records as of 2025-10-13
- Benefit plan 4, 2024 filing
- CENTURY ALUMINUM 401(K) PLAN
- Source: DOL 5500 · as of 2025-10-13
- Participants (start of year)
- 1,957
- Source: DOL 5500 · as of 2025-10-13
- Plan features
- Profit-sharing; ERISA 404(c) plan; Stock bonus; 401(k) feature; 401(m) matching; Pension plan with defined contribution
- Source: DOL 5500 · as of 2025-10-13
- Plan type
- Single-employer plan
- Source: DOL 5500 · as of 2025-10-13
- Business code (NAICS)
- 331310
- Source: DOL 5500 · as of 2025-10-13
- Benefit plan 5, 2024 filing
- CENTURY ALUMINUM CONSOLIDATED RETIREMENT PLAN
- Source: DOL 5500 · as of 2025-10-13
- Participants (start of year)
- 1,848
- Source: DOL 5500 · as of 2025-10-13
- Plan features
- Defined benefit (cash balance); Defined benefit (cash balance, other); Plan sponsor is a member of an affiliated service group
- Source: DOL 5500 · as of 2025-10-13
- Plan type
- Single-employer plan
- Source: DOL 5500 · as of 2025-10-13
What this record is
Public filings that carry this EIN (DOL Form 5500 filings (EFAST2) and SEC EDGAR company filings), shown as filed. Nothing is scraped from the IRS, and a public-record match is not IRS TIN validation.
What it is not
Registry status, formation date, and registered agent come from the Illinois Secretary of State, Department of Business Services; see the Illinois business entity search.
If something is wrong
A name, address, or classification here is what the source published. To correct the source, file with it; to have this page removed, see corrections and removal.
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