Century Aluminum CO

Suite 1000, 1, South Wacker Drive, Chicago, IL 60606

LIKELY ACTIVELAST SEEN IN FEDERAL DATA MAR 2026 · 2 SOURCES

Operating signal within 24 months, or from a single source.

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What they make

Alumina Refining and Primary Aluminum Production331313

Where it is

Location not verified — this address could not be matched to Census TIGER, so the facility is not placed on the map.

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STREET VIEW

Open street-level view — AUG 2025

Other plants nearby

No other listed facility within 40 km shares this one’s four-digit industry code, or this record has no coordinates to measure from.

Also at this address

No other federal record shares this street address.

Where this record comes from

2 sources hold this plant, and 8 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.

SAM.gov entity registrationOPERATING
Record N3HNH7CDLHB6 · first seen MAR 2026 · last seen MAR 2026
DOL Form 5500 retirement plan filingsOPERATING
Record 133070826|IL|60606|one s wacker ste 1000 · first seen DEC 2024 · last seen DEC 2024

What each source says

Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

Name: SAM.gov: CENTURY ALUMINUM CO · MAR 2026
Street address: SAM.gov: SUITE 1000 · MAR 2026
City: SAM.gov: CHICAGO · MAR 2026
State: SAM.gov: IL · MAR 2026
CAGE code: SAM.gov: 8FRC3 · MAR 2026
Retirement plan filing (Form 5500): DOL: 1,232 active participants, plan year ending 2024-12-31, 2 plan(s) · DEC 2024
SAM registration expires: SAM.gov: 2027-03-25 · MAR 2026
State business registrationSOURCES DISAGREE: KY SOS: CENTURY ALUMINUM COMPANY, registered with the Kentucky Secretary of State; Corporation formed in Delaware; registered 2007-09-14; active, annual report filed 2026-06-19 · JUN 2026; TX Comptroller: CENTURY ALUMINUM COMPANY, registered with the Texas Comptroller of Public Accounts; Corporation; active; WV SOS: CENTURY ALUMINUM COMPANY, registered with the West Virginia Secretary of State; Corporation formed in Delaware; registered 1996-10-30; active, annual report filed 2026-01-01 · JAN 2026

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