---
schema_version: "secwatch.filing_event.v1"
accession: "0000887343-26-000181"
form_type: "8-K"
ticker: "COLB"
cik: "0000887343"
company_name: "COLUMBIA BANKING SYSTEM, INC."
filed_at: "2026-09-30T21:07:09+00:00"
generated_at: "2026-10-12T14:09:28.851990+00:00"
event_type: "other"
sentiment: "neutral"
materiality_score: 0.1
calibrated_materiality_score: 0.1
confidence: "high"
source: SEC EDGAR
---

# Columbia Banking System sets Q3 2026 earnings release for Oct. 22, conference call same day

## Summary
- Columbia Banking System (Nasdaq: COLB) will release third quarter 2026 financial results on Thursday, October 22, 2026, after market close.
- Management will host a conference call at 2:00 p.m. PT (5:00 p.m. ET) that day to discuss results and provide an update on recent activities, followed by a live Q&A.
- No financial figures, guidance or preliminary results were disclosed; the filing is a scheduling notice only.
- A replay will be available through Columbia's investor relations page under the 'News & Market Data-Event Calendar' section.

## SEC filing metadata
- accession: 0000887343-26-000181
- form_type: 8-K
- ticker: COLB
- cik: 0000887343
- company_name: COLUMBIA BANKING SYSTEM, INC.
- filed_at: 2026-09-30T21:07:09+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/887343/000088734326000181/0000887343-26-000181-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/887343/000088734326000181/colb-20260930.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000887343-26-000181
- JSON: https://secwatch.observer/filing/0000887343-26-000181.json
- Plain text: https://secwatch.observer/filing/0000887343-26-000181.txt

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