{"schema_version":"secwatch.filing_event.v1","accession":"0001437749-23-034441","form_type":"8-K","ticker":"UNP","cik":"0000100885","company_name":"UNION PACIFIC CORP","filed_at":"2023-12-14T23:59:59+00:00","discovered_at":"2026-05-14T18:03:27.834192+00:00","generated_at":"2026-06-07T12:28:33.374240+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":"Union Pacific appoints John Tien, former DHS deputy secretary, to board of directors","bullets":["John Tien elected to board effective December 14, 2023; fills current vacancy.","Tien most recently served as Deputy Secretary of Homeland Security (2021-2023), overseeing multi-billion-dollar budget and 3,000+ overseas personnel.","He held senior executive roles at Citigroup for 10 years, including chief administrative officer and chief of staff for global consumer operations.","Tien served 24 years in U.S. Army (Colonel), three combat tours in Iraq, and as NSC Senior Director for Afghanistan and Pakistan.","Board determined Tien independent under NYSE standards; no material relationship with Union Pacific."],"urls":{"canonical":"https://secwatch.observer/filing/0001437749-23-034441","json":"https://secwatch.observer/filing/0001437749-23-034441.json","markdown":"https://secwatch.observer/filing/0001437749-23-034441.md","text":"https://secwatch.observer/filing/0001437749-23-034441.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/100885/000143774923034441/0001437749-23-034441-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/100885/000143774923034441/unp20231213_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-07T12:28:33.374240+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":"722481e27f","claim":"John K. Tien was elected as Director at UNION PACIFIC CORP.","evidence_excerpt":"The Board of Directors (the Board) of Union Pacific Corporation (the Company) elected John K. Tien, age 60, to serve on the Board as a director of the Company, effective December 14, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/100885/000143774923034441/0001437749-23-034441-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"elected"},{"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"}