---
schema_version: "secwatch.filing_event.v1"
accession: "0000887343-26-000116"
form_type: "8-K"
ticker: "COLB"
cik: "0000887343"
company_name: "COLUMBIA BANKING SYSTEM, INC."
filed_at: "2026-03-31T23:59:59+00:00"
generated_at: "2026-05-15T08:19:10.419893+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# Columbia Banking sets Q1 2026 earnings release and call for April 23

## Summary
- Q1 2026 results will be released after market close on Thursday, April 23, 2026.
- Conference call for investors and analysts at 2:00 p.m. PT (5:00 p.m. ET) the same day.
- Management will discuss results and recent activities; Q&A session to follow.
- Ticker: COLB (Nasdaq). No preliminary financial information provided.

## SEC filing metadata
- accession: 0000887343-26-000116
- form_type: 8-K
- ticker: COLB
- cik: 0000887343
- company_name: COLUMBIA BANKING SYSTEM, INC.
- filed_at: 2026-03-31T23:59:59+00:00
- event_type: other
- sentiment: neutral
- materiality_score: 0.1
- calibrated_materiality_score: 0.1
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/887343/000088734326000116/0000887343-26-000116-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/887343/000088734326000116/colb-20260331.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000887343-26-000116
- JSON: https://secwatch.observer/filing/0000887343-26-000116.json
- Plain text: https://secwatch.observer/filing/0000887343-26-000116.txt

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