---
schema_version: "secwatch.filing_event.v1"
accession: "0000887343-24-000178"
form_type: "8-K"
ticker: "COLB"
cik: "0000887343"
company_name: "COLUMBIA BANKING SYSTEM, INC."
filed_at: "2024-04-25T23:59:59+00:00"
generated_at: "2026-06-03T08:58:47.114844+00:00"
event_type: "earnings"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Columbia Banking Q1 GAAP EPS $0.59; net interest margin falls 26 bps to 3.52%

## Summary
- GAAP diluted EPS $0.59, operating EPS $0.65; net interest income $423M, down $30M QoQ.
- Net interest margin 3.52%, down 26 bps from 4Q23; deposit cost 2.88% stabilized in March.
- Provision for credit losses $17M vs $55M prior; net charge-offs 0.47% annualized vs 0.31%.
- Nonperforming assets 0.28% of total assets, up from 0.22%; ACL 1.16% of loans.
- Tangible book value $16.03; CET1 ratio 9.8%, total capital 12.0%; dividend $0.36.

## SEC filing metadata
- accession: 0000887343-24-000178
- form_type: 8-K
- ticker: COLB
- cik: 0000887343
- company_name: COLUMBIA BANKING SYSTEM, INC.
- filed_at: 2024-04-25T23:59:59+00:00
- event_type: earnings
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/887343/000088734324000178/0000887343-24-000178-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/887343/000088734324000178/colb-20240425.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000887343-24-000178
- JSON: https://secwatch.observer/filing/0000887343-24-000178.json
- Plain text: https://secwatch.observer/filing/0000887343-24-000178.txt

## Key facts
- Earnings Releases
  COLUMBIA BANKING SYSTEM, INC. reported financial results for first quarter 2024.
  - Period: first quarter 2024
  - Result: reported results
  source text: On April 25, 2024, Columbia Banking System, Inc. issued a press release announcing first quarter 2024 financial results.
  evidence_url: https://www.sec.gov/Archives/edgar/data/887343/000088734324000178/0000887343-24-000178-index.htm

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