---
schema_version: "secwatch.filing_event.v1"
accession: "0000887343-25-000163"
form_type: "8-K"
ticker: "COLB"
cik: "0000887343"
company_name: "COLUMBIA BANKING SYSTEM, INC."
filed_at: "2025-05-05T23:59:59+00:00"
generated_at: "2026-05-22T21:43:00.527257+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.15
calibrated_materiality_score: 0.15
confidence: "low"
source: SEC EDGAR
---

# Columbia Banking files investor presentation for Pacific Premier merger; no new financials

## Summary
- Filed investor slide deck under Regulation FD for upcoming meetings on May 5, 2025.
- Presentation covers pending business combination with Pacific Premier Bancorp (PPBI).
- No updated financial results, guidance, or changes to merger terms disclosed.
- All forward-looking statements and disclaimers are repeated from prior filings.

## SEC filing metadata
- accession: 0000887343-25-000163
- form_type: 8-K
- ticker: COLB
- cik: 0000887343
- company_name: COLUMBIA BANKING SYSTEM, INC.
- filed_at: 2025-05-05T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.15
- calibrated_materiality_score: 0.15
- confidence: low
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/887343/000088734325000163/0000887343-25-000163-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/887343/000088734325000163/colb-20250505.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000887343-25-000163
- JSON: https://secwatch.observer/filing/0000887343-25-000163.json
- Plain text: https://secwatch.observer/filing/0000887343-25-000163.txt

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