{"schema_version":"secwatch.filing_event.v1","accession":"0000100885-26-000305","form_type":"8-K","ticker":"UNP","cik":"0000100885","company_name":"UNION PACIFIC CORP","filed_at":"2026-10-16T13:01:58+00:00","discovered_at":"2026-10-16T13:03:00.314569+00:00","generated_at":"2026-10-16T13:03:05.186753+00:00","sec_items":["5.02","7.01","9.01"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.45,"calibrated_materiality_score":0.45,"confidence":"high","headline":"Union Pacific CFO Jennifer Hamann to retire in early 2027 after 35 years; successor unnamed","bullets":["Hamann plans to retire as EVP and CFO effective in early 2027, per the Oct. 16, 2026 announcement; she retains her current responsibilities until then.","Union Pacific said succession plans will be announced at a later date; no replacement was named.","Hamann joined UP in 1992 on the audit staff and became CFO in January 2020, the first woman to hold the role.","CEO Jim Vena credited her with guiding finances through COVID-19 and operational transformation; Hamann voiced support for the pending merger.","Hamann serves on boards including TTX Company, Grupo Ferroviario Mexicano and Steel Dynamics."],"urls":{"canonical":"https://secwatch.observer/filing/0000100885-26-000305","json":"https://secwatch.observer/filing/0000100885-26-000305.json","markdown":"https://secwatch.observer/filing/0000100885-26-000305.md","text":"https://secwatch.observer/filing/0000100885-26-000305.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/100885/000010088526000305/0000100885-26-000305-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/100885/000010088526000305/unp-20261016.htm"},"model":{"generated_by":"deepseek-v4.1-flash:cloud@v2","generated_at":"2026-10-16T13:03:05.186753+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":"51a380e1c2","claim":"Jennifer L. Hamann departed as Executive Vice President and Chief Financial Officer at UNION PACIFIC CORP.","evidence_excerpt":"On October 16, 2026, Union Pacific Corporation (the Company) announced that Jennifer L. Hamann plans to retire as Executive Vice President and Chief Financial Officer effective in early 2027.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/100885/000010088526000305/0000100885-26-000305-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"plans to retire"},{"label":"Role","value":"Executive Vice President and Chief Financial Officer"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}