{"schema_version":"secwatch.filing_event.v1","accession":"0000067716-23-000004","form_type":"8-K","ticker":"MDU","cik":"0000067716","company_name":"MDU RESOURCES GROUP INC","filed_at":"2023-01-24T23:59:59+00:00","discovered_at":"2026-05-14T18:03:47.787117+00:00","generated_at":"2026-06-20T11:10:42.552034+00:00","sec_items":["1.01","5.02","8.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.65,"calibrated_materiality_score":0.65,"confidence":"high","headline":"MDU Resources enters cooperation agreement with Corvex; appoints James Gemmel to board subject to FERC approval","bullets":["James Gemmel appointed as non-voting board observer immediately; will become director upon FERC approval, increasing board size by one.","Corvex agrees to standstill and voting commitments; Gemmel's resignation triggered upon separation of Knife River and MDU Construction Services.","2023 Annual Meeting scheduled for May 9; Gemmel's directorship term depends on timing of FERC approval relative to proxy mailing.","MDU Resources is progressing with Knife River spinoff and strategic review of Construction Services Group."],"urls":{"canonical":"https://secwatch.observer/filing/0000067716-23-000004","json":"https://secwatch.observer/filing/0000067716-23-000004.json","markdown":"https://secwatch.observer/filing/0000067716-23-000004.md","text":"https://secwatch.observer/filing/0000067716-23-000004.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/67716/000006771623000004/0000067716-23-000004-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/67716/000006771623000004/mdu-20230124.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-20T11:10:42.552034+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":[{"claim_id":"4a2c7ecad6","claim":"James Gemmel was appointed as non-voting observer (future director subject to FERC approval) at MDU RESOURCES GROUP INC.","evidence_excerpt":"Mr. Gemmel (i) was appointed as a non-voting observer of the Board, effective immediately following the execution of the Cooperation Agreement on January 24, 2023","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/67716/000006771623000004/0000067716-23-000004-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"appointed"},{"label":"Role","value":"non-voting observer (future director subject to FERC approval)"}],"fact_type":"executive_change"},{"claim_id":"754c607a5cd611f83ae99dd7a62add6fe1575cd0","claim":"MDU RESOURCES GROUP INC entered into Cooperation Agreement with Keith A. Meister and Corvex Management LP (effective 2023-01-24).","evidence_excerpt":"On January 24, 2023, MDU Resources Group, Inc. (“MDU Resources” or the “Company”) entered into a Cooperation Agreement (the “Cooperation Agreement”) with Keith A. Meister and Corvex Management LP (Mr. Meister and Corvex Management LP, together with their respective affiliates, the “Corvex Group”).","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/67716/000006771623000004/0000067716-23-000004-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Counterparty","value":"Keith A. Meister and Corvex Management LP"},{"label":"Effective","value":"2023-01-24"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}