---
schema_version: "secwatch.filing_event.v1"
accession: "0000887343-25-000133"
form_type: "8-K"
ticker: "COLB"
cik: "0000887343"
company_name: "COLUMBIA BANKING SYSTEM, INC."
filed_at: "2025-03-31T23:59:59+00:00"
generated_at: "2026-05-24T02:45:20.289707+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.2
calibrated_materiality_score: 0.2
confidence: "high"
source: SEC EDGAR
---

# Columbia Banking System sets Q1 2025 earnings call for April 24 after market close

## Summary
- First quarter 2025 financial results released Thursday, April 24, 2025 after market close.
- Conference call at 2:00 p.m. PT (5:00 p.m. ET) with Q&A session.
- Parent company of Umpqua Bank; ticker COLB on Nasdaq.

## SEC filing metadata
- accession: 0000887343-25-000133
- form_type: 8-K
- ticker: COLB
- cik: 0000887343
- company_name: COLUMBIA BANKING SYSTEM, INC.
- filed_at: 2025-03-31T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.2
- calibrated_materiality_score: 0.2
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/887343/000088734325000133/0000887343-25-000133-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/887343/000088734325000133/colb-20250331.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000887343-25-000133
- JSON: https://secwatch.observer/filing/0000887343-25-000133.json
- Plain text: https://secwatch.observer/filing/0000887343-25-000133.txt

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