{"schema_version":"secwatch.filing_event.v1","accession":"0000949157-21-000129","form_type":"8-K","ticker":"CENX","cik":"0000949157","company_name":"CENTURY ALUMINUM CO","filed_at":"2021-11-03T23:59:59+00:00","discovered_at":"2026-05-14T18:04:16.370105+00:00","generated_at":"2026-06-28T14:48:18.448531+00:00","sec_items":["1.01","2.03","7.01","9.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"Century Aluminum announces $120M casthouse expansion for low-carbon billet production in Iceland","bullets":["New billet casthouse at Grundartangi with 150,000 tonnes capacity; expected production start Q1 2024.","Investment of $120 million; will create approximately 90 jobs.","Primary foundry alloys capacity to double from 60,000 to 120,000 tonnes, replacing standard ingot.","Project fully financed via green financing from Arion Bank (up to $130M term facility).","Expected to produce low-carbon Natur-Al™ billet with <1/4 industry average CO₂ footprint."],"urls":{"canonical":"https://secwatch.observer/filing/0000949157-21-000129","json":"https://secwatch.observer/filing/0000949157-21-000129.json","markdown":"https://secwatch.observer/filing/0000949157-21-000129.md","text":"https://secwatch.observer/filing/0000949157-21-000129.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/949157/000094915721000129/0000949157-21-000129-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/949157/000094915721000129/cenx-20211102.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-28T14:48:18.448531+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}