{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-25-093889","form_type":"8-K","ticker":"MSB","cik":"0000065172","company_name":"MESABI TRUST","filed_at":"2025-09-26T23:59:59+00:00","discovered_at":"2026-05-14T18:02:46.160817+00:00","generated_at":"2026-05-17T05:37:46.919576+00:00","sec_items":["7.01","9.01"],"event_type":"litigation","sentiment":"negative","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"Mesabi Trust initiates arbitration against Cleveland-Cliffs over idling and royalty underpayments","bullets":["Arbitration filed Sept 26, 2025 via American Arbitration Association against Northshore Mining and Cleveland-Cliffs.","Claims relate to idling of Northshore operations from May 2022 to April 2023.","Also claims underpayment of royalties on intercompany shipments from 2023 to present.","Seeks damages and declaratory relief for alleged breaches of lease/operating agreement."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-25-093889","json":"https://secwatch.observer/filing/0001104659-25-093889.json","markdown":"https://secwatch.observer/filing/0001104659-25-093889.md","text":"https://secwatch.observer/filing/0001104659-25-093889.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/65172/000110465925093889/0001104659-25-093889-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/65172/000110465925093889/msb-20250926x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-17T05:37:46.919576+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"}