---
schema_version: "secwatch.filing_event.v1"
accession: "0000887343-25-000130"
form_type: "8-K"
ticker: "COLB"
cik: "0000887343"
company_name: "COLUMBIA BANKING SYSTEM, INC."
filed_at: "2025-03-27T23:59:59+00:00"
generated_at: "2026-05-24T04:30:51.759171+00:00"
event_type: "litigation"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Columbia Banking settles class action against Umpqua Bank for $55M

## Summary
- Proposed settlement of $55M in class action; plaintiffs had alleged damages of $297.4M–$368.1M.
- Mistrial declared March 4, 2025 when jury could not reach verdict; followed court-ordered mediation.
- Settlement subject to formal agreement and preliminary/final court approval; expected funding by early 2026.
- Case against Umpqua Bank stemmed from 2012 acquisition of Circle Bank; claims of aiding and abetting commercial real estate failure.

## SEC filing metadata
- accession: 0000887343-25-000130
- form_type: 8-K
- ticker: COLB
- cik: 0000887343
- company_name: COLUMBIA BANKING SYSTEM, INC.
- filed_at: 2025-03-27T23:59:59+00:00
- event_type: litigation
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/887343/000088734325000130/0000887343-25-000130-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/887343/000088734325000130/colb-20250327.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000887343-25-000130
- JSON: https://secwatch.observer/filing/0000887343-25-000130.json
- Plain text: https://secwatch.observer/filing/0000887343-25-000130.txt

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