{"schema_version":"secwatch.filing_event.v1","accession":"0001140361-23-024280","form_type":"8-K","ticker":"KNF","cik":"0001955520","company_name":"Knife River Corp","filed_at":"2023-05-12T23:59:59+00:00","discovered_at":"2026-05-14T18:03:41.618562+00:00","generated_at":"2026-06-15T02:55:18.225854+00:00","sec_items":["7.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"Knife River spin-off from MDU Resources set for May 31; 1-for-4 ratio","bullets":["Registration Statement on Form 10 declared effective May 10; final Information Statement dated May 12.","One share of KNF common stock distributed for every four shares of MDU common held on May 22 record date.","Distribution expected at 11:59 p.m. ET on May 31; when-issued trading (KNF WI) begins May 25.","MDU Resources will distribute approximately 90% of outstanding Knife River shares to its stockholders."],"urls":{"canonical":"https://secwatch.observer/filing/0001140361-23-024280","json":"https://secwatch.observer/filing/0001140361-23-024280.json","markdown":"https://secwatch.observer/filing/0001140361-23-024280.md","text":"https://secwatch.observer/filing/0001140361-23-024280.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1955520/000114036123024280/0001140361-23-024280-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1955520/000114036123024280/ny20006220x15_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-15T02:55:18.225854+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"}