{"filing":{"accession_number":"0001292814-26-004734","cik":"0001049659","ticker":"SID","company_name":"NATIONAL STEEL CO","form":"6-K","filing_date":"2026-09-29","report_date":"2026-09-30","primary_document":"sid20260929_6k.htm","primary_document_url":"https://www.sec.gov/Archives/edgar/data/1049659/000129281426004734/sid20260929_6k.htm"},"events":[{"id":35644,"run_id":32841,"accession_number":"0001292814-26-004734","anchor_item_number":null,"event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"summary":"CSN's subsidiary announced a temporary reduction in lower-grade iron ore production at its Pires Complex due to challenging market conditions and higher freight costs, coupled with downward revisions to 2026 production guidance (45.0–47.0 Mt to 39.0–41.0 Mt) and upward revisions to C1 cash costs (US$22.0–23.5/ton to US$25.0–26.0/ton). This is a material operational and strategic decision affecting production volumes and cost structure, but does not fit the specific categories of workforce_reduction, ma_activity, or other named types—it is a production adjustment with market-driven rationale.","company_name":"NATIONAL STEEL CO","ticker":"SID","filing_date":"2026-09-29","form":"6-K","submitted_at":null,"items":null}],"classifications":[{"id":39779,"accession_number":"0001292814-26-004734","item_number":null,"item_title":null,"event_type":"operational_other","event_domain":"operational","is_material":true,"confidence":0.85,"reasoning":"CSN's subsidiary announced a temporary reduction in lower-grade iron ore production at its Pires Complex due to challenging market conditions and higher freight costs, coupled with downward revisions to 2026 production guidance (45.0–47.0 Mt to 39.0–41.0 Mt) and upward revisions to C1 cash costs (US$22.0–23.5/ton to US$25.0–26.0/ton). This is a material operational and strategic decision affecting production volumes and cost structure, but does not fit the specific categories of workforce_reduction, ma_activity, or other named types—it is a production adjustment with market-driven rationale.","classifier_version":"claude-haiku-4-5-20251001+prompt-6be895f9","taxonomy_version":"v1.3","classified_at":"2026-09-29T13:01:41.527894+00:00","company_name":"NATIONAL STEEL CO","ticker":"SID","filing_date":"2026-09-29"}]}