{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-25-133796","form_type":"8-K","ticker":"NSC","cik":"0000702165","company_name":"NORFOLK SOUTHERN CORP","filed_at":"2025-06-03T23:59:59+00:00","discovered_at":"2026-05-14T18:02:51.055125+00:00","generated_at":"2026-05-20T02:06:41.104543+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.3,"calibrated_materiality_score":0.3,"confidence":"high","headline":"Norfolk Southern Board Chair Claude Mongeau resigns for personal reasons","bullets":["Claude Mongeau resigned from the Board effective June 2, 2025, citing personal reasons.","A new Board Chair will be elected at the next scheduled board meeting later in June 2025.","Mongeau had served as independent director since Sept 2019 and as Chair since May 2024.","CEO Mark R. George thanked Mongeau for his leadership during recent challenges and board integration."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-25-133796","json":"https://secwatch.observer/filing/0001193125-25-133796.json","markdown":"https://secwatch.observer/filing/0001193125-25-133796.md","text":"https://secwatch.observer/filing/0001193125-25-133796.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/702165/000119312525133796/0001193125-25-133796-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/702165/000119312525133796/d35291d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-20T02:06:41.104543+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":"62a2f0bf5f","claim":"Claude Mongeau resigned as Chair of the Board of Directors at NORFOLK SOUTHERN CORP.","evidence_excerpt":"On June 2, 2025, Claude Mongeau, Chair of the Board of Directors (the “Board”) of Norfolk Southern Corporation (the “Company”) resigned from the Board for personal reasons.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/702165/000119312525133796/0001193125-25-133796-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Chair of the Board of Directors"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}