---
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"
generated_at: "2026-10-16T13:03:05.186753+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# Union Pacific CFO Jennifer Hamann to retire in early 2027 after 35 years; successor unnamed

## Summary
- 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.

## SEC filing metadata
- 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
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- 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

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000100885-26-000305
- JSON: https://secwatch.observer/filing/0000100885-26-000305.json
- Plain text: https://secwatch.observer/filing/0000100885-26-000305.txt

## Key facts
- Executive change
  Jennifer L. Hamann departed as Executive Vice President and Chief Financial Officer at UNION PACIFIC CORP.
  - Action: plans to retire
  - Role: Executive Vice President and Chief Financial Officer
  source text: 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_url: https://www.sec.gov/Archives/edgar/data/100885/000010088526000305/0000100885-26-000305-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.