{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-23-102154","form_type":"8-K","ticker":"BSM","cik":"0001621434","company_name":"Black Stone Minerals, L.P.","filed_at":"2023-04-14T23:59:59+00:00","discovered_at":"2026-05-14T18:03:39.698814+00:00","generated_at":"2026-06-17T01:57:18.325284+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.4,"calibrated_materiality_score":0.4,"confidence":"high","headline":"Director Allison K. Thacker will not stand for reelection at BSM's annual meeting","bullets":["Allison K. Thacker notified Black Stone Minerals she will not stand for reelection.","Decision is not due to any disagreement with the Partnership or General Partner.","Effective at the upcoming annual meeting of limited partners; no replacement named."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-23-102154","json":"https://secwatch.observer/filing/0001193125-23-102154.json","markdown":"https://secwatch.observer/filing/0001193125-23-102154.md","text":"https://secwatch.observer/filing/0001193125-23-102154.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1621434/000119312523102154/0001193125-23-102154-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1621434/000119312523102154/d496913d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-17T01:57:18.325284+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":"e7dc92410e","claim":"Allison K. Thacker departed as Director at Black Stone Minerals, L.P..","evidence_excerpt":"By letter dated April 13, 2023, Allison K. Thacker notified Black Stone Minerals, L.P. (the “Partnership”) and Black Stone Minerals GP, L.L.C., the Partnership’s general partner (the “General Partner”), of her decision not to stand for reelection at the Partnership’s upcoming annual meeting of limited partners.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1621434/000119312523102154/0001193125-23-102154-index.htm","confidence":1.0,"family_label":"Executive change","details":[{"label":"Action","value":"not stand for reelection"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}