---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-25-290691"
form_type: "8-K"
ticker: "COLB"
cik: "0000887343"
company_name: "COLUMBIA BANKING SYSTEM, INC."
filed_at: "2025-11-21T23:59:59+00:00"
generated_at: "2026-05-16T17:48:57.245336+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.45
calibrated_materiality_score: 0.45
confidence: "high"
source: SEC EDGAR
---

# Columbia Banking appoints Brock Lakely as Chief Accounting Officer; Lisa White departs

## Summary
- Lisa M. White ceased as EVP, Principal Accounting Officer and Corporate Controller effective Nov 19, 2025.
- Brock Lakely appointed EVP, Chief Accounting Officer and Corporate Controller effective Nov 20, 2025.
- Lakely's annual base salary set at $360,000; he previously served as Chief Audit Executive and earlier as Chief Accounting Officer from 2018-2023.
- Lakely is a CPA with prior Ernst & Young experience; no familial or reportable transaction relationships disclosed.

## SEC filing metadata
- accession: 0001193125-25-290691
- form_type: 8-K
- ticker: COLB
- cik: 0000887343
- company_name: COLUMBIA BANKING SYSTEM, INC.
- filed_at: 2025-11-21T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.45
- calibrated_materiality_score: 0.45
- confidence: high
- sec_items: 5.02
- EDGAR index: https://www.sec.gov/Archives/edgar/data/887343/000119312525290691/0001193125-25-290691-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/887343/000119312525290691/d90471d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-25-290691
- JSON: https://secwatch.observer/filing/0001193125-25-290691.json
- Plain text: https://secwatch.observer/filing/0001193125-25-290691.txt

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