---
schema_version: "secwatch.filing_event.v1"
accession: "0000887343-25-000236"
form_type: "8-K"
ticker: "COLB"
cik: "0000887343"
company_name: "COLUMBIA BANKING SYSTEM, INC."
filed_at: "2025-08-15T23:59:59+00:00"
generated_at: "2026-05-17T12:42:38.525471+00:00"
event_type: "dividend"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.25
confidence: "high"
source: SEC EDGAR
---

# Columbia Banking System declares $0.36 quarterly dividend, payable Sept 15

## Summary
- Board approved quarterly cash dividend of $0.36 per common share.
- Dividend payable September 15, 2025 to shareholders of record as of August 29, 2025.
- Columbia Banking System (Nasdaq: COLB) parent of Columbia Bank, formerly Umpqua Bank.

## SEC filing metadata
- accession: 0000887343-25-000236
- form_type: 8-K
- ticker: COLB
- cik: 0000887343
- company_name: COLUMBIA BANKING SYSTEM, INC.
- filed_at: 2025-08-15T23:59:59+00:00
- event_type: dividend
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.25
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/887343/000088734325000236/0000887343-25-000236-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/887343/000088734325000236/colb-20250815.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000887343-25-000236
- JSON: https://secwatch.observer/filing/0000887343-25-000236.json
- Plain text: https://secwatch.observer/filing/0000887343-25-000236.txt

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