---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-264630"
form_type: "8-K"
ticker: "COLB"
cik: "0000887343"
company_name: "COLUMBIA BANKING SYSTEM, INC."
filed_at: "2025-11-04T23:59:59+00:00"
generated_at: "2026-05-17T00:47:34.446052+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Columbia Banking System appoints Ivan Seda as CFO effective Dec 31, 2025; Farnsworth transitions to advisor

## Summary
- Ivan Seda named CFO effective Dec 31, 2025; base salary $550,000, target incentive 85%, PSU grant $750,000.
- Ronald Farnsworth steps down as CFO on Dec 31, 2025, serves as senior advisor through June 1, 2026.
- Farnsworth receives cash severance, 18 months of benefits contributions, and lump sum based on 62,572 target shares.
- Seda joined Columbia as Deputy CFO in August 2025; prior roles include CFO at Union Bank and Deputy CFO at BECU.

## SEC filing metadata
- accession: 0001193125-25-264630
- form_type: 8-K
- ticker: COLB
- cik: 0000887343
- company_name: COLUMBIA BANKING SYSTEM, INC.
- filed_at: 2025-11-04T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/887343/000119312525264630/0001193125-25-264630-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/887343/000119312525264630/d846413d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-264630
- JSON: https://secwatch.observer/filing/0001193125-25-264630.json
- Plain text: https://secwatch.observer/filing/0001193125-25-264630.txt

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