{"schema_version":"secwatch.filing_event.v1","accession":"0000067716-24-000026","form_type":"8-K","ticker":"MDU","cik":"0000067716","company_name":"MDU RESOURCES GROUP INC","filed_at":"2024-03-18T23:59:59+00:00","discovered_at":"2026-05-14T18:03:26.684670+00:00","generated_at":"2026-06-04T16:10:16.407512+00:00","sec_items":["1.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"MDU Resources amends Corvex cooperation agreement; adds James Gemmel to board tied to ownership and spin-off","bullets":["James H. Gemmel added as board nominee for 2024 annual meeting; term expires at 2025 meeting.","Gemmel must resign if Corvex holds less than 8.1M shares, upon MDU Construction Services spin-off, or at 2025 annual meeting.","Standstill provisions extended to coincide with Gemmel's board tenure.","Agreement amends and restates original cooperation agreement from January 2023."],"urls":{"canonical":"https://secwatch.observer/filing/0000067716-24-000026","json":"https://secwatch.observer/filing/0000067716-24-000026.json","markdown":"https://secwatch.observer/filing/0000067716-24-000026.md","text":"https://secwatch.observer/filing/0000067716-24-000026.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/67716/000006771624000026/0000067716-24-000026-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/67716/000006771624000026/mdu-20240314.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-04T16:10:16.407512+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"}