COLUMBIA BANKING SYSTEM, INC. (COLB) Form 8-K Material Events
COLUMBIA BANKING SYSTEM, INC. (COLB) is a publicly traded company on the Nasdaq, categorized under SIC 6022 (State Commercial Banks). Access real-time SEC filings, 10-K annual reports, 10-Q quarterlies, 8-K current reports, PCAOB auditor history, and executive compensation disclosures.
Ticker: COLB
CIK: 887343
Exchange: Nasdaq
SIC 6022: State Commercial Banks
Fiscal Year End: 12/31
State: WA
Independent PCAOB Auditor
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Audit Firm
Deloitte & Touche LLP
Auditor SinceSince 12/31/2025 12:00:00 AM
Lead Engagement PartnerJames Oliver
Audit LocationPortland, Oregon, United States
Latest SEC EDGAR Filings
Showing 10-K, 10-Q, 8-K, Form 4, and other SEC submissions| Form | Filing Date | Reporting Period | Description | Accession Number | Actions |
|---|---|---|---|---|---|
| 8-K | 2026-09-30 | 2026-09-30 | 8-K | 0000887343-26-000181 | View SEC Doc Filr Page |
| 4 | 2026-09-15 | 2026-09-14 | FORM 4 | 0000887343-26-000178 | View SEC Doc Filr Page |
| 4 | 2026-09-08 | 2026-09-04 | FORM 4 | 0001267342-26-000003 | View SEC Doc Filr Page |
| 4 | 2026-09-04 | 2026-09-02 | FORM 4 | 0001084960-26-000007 | View SEC Doc Filr Page |
| 3 | 2026-09-02 | 2026-09-01 | FORM 3 | 0000887343-26-000176 | View SEC Doc Filr Page |
| 4 | 2026-08-18 | 2026-08-14 | FORM 4 | 0000887343-26-000174 | View SEC Doc Filr Page |
| 8-K | 2026-08-14 | 2026-08-14 | 8-K | 0000887343-26-000173 | View SEC Doc Filr Page |
| SCHEDULE 13G/A | 2026-08-13 | — | SCHEDULE 13G/A Filing | 0000902219-26-000265 | View SEC Doc Filr Page |
| 10-Q | 2026-08-04 | 2026-06-30 | 10-Q | 0000887343-26-000170 | View SEC Doc Filr Page |
| 8-K | 2026-07-30 | 2026-07-28 | 8-K | 0000887343-26-000167 | View SEC Doc Filr Page |
| 8-K | 2026-07-23 | 2026-07-23 | 8-K | 0000887343-26-000165 | View SEC Doc Filr Page |
| 4 | 2026-07-02 | 2026-06-30 | FORM 4 | 0000887343-26-000161 | View SEC Doc Filr Page |
| 8-K | 2026-07-01 | 2026-06-30 | 8-K | 0000887343-26-000159 | View SEC Doc Filr Page |
| 11-K | 2026-06-25 | 2025-12-31 | 11-K | 0000887343-26-000156 | View SEC Doc Filr Page |
| 4 | 2026-06-16 | 2026-06-15 | FORM 4 | 0001133099-26-000010 | View SEC Doc Filr Page |
| 11-K/A | 2026-06-16 | 2025-12-31 | 11-K/A | 0000887343-26-000150 | View SEC Doc Filr Page |
| 4 | 2026-06-10 | 2026-06-08 | FORM 4 | 0001798077-26-000005 | View SEC Doc Filr Page |
| 144 | 2026-06-08 | — | 144 Filing | 0001959173-26-004456 | View SEC Doc Filr Page |
| 4 | 2026-05-18 | 2026-05-14 | FORM 4 | 0000887343-26-000147 | View SEC Doc Filr Page |
| 4 | 2026-05-18 | 2026-05-14 | FORM 4 | 0001481735-26-000003 | View SEC Doc Filr Page |
| 4 | 2026-05-18 | 2026-05-14 | FORM 4 | 0001222385-26-000002 | View SEC Doc Filr Page |
| 4 | 2026-05-18 | 2026-05-14 | FORM 4 | 0001610217-26-000002 | View SEC Doc Filr Page |
| 4 | 2026-05-18 | 2026-05-14 | FORM 4 | 0000887343-26-000146 | View SEC Doc Filr Page |
| 4 | 2026-05-18 | 2026-05-14 | FORM 4 | 0001284574-26-000003 | View SEC Doc Filr Page |
| 4 | 2026-05-18 | 2026-05-14 | FORM 4 | 0001133099-26-000007 | View SEC Doc Filr Page |