Columbia Banking System, Inc. SEC filings COLB
Columbia Banking System, Inc. has 1,001 filings in SEC EDGAR's recent list, going back to May 26, 2017. Its latest annual report, Form ARS, was filed on Mar 31, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Nov 5, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 27, 2026 (officer or director change). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| DEF 14A | Proxy statement | Mar 31, 2026 | May 14, 2026 |
| DEFA14A | Additional proxy material | Mar 31, 2026 | — |
| DEFA14A | Additional proxy material | Apr 3, 2025 | — |
| DEF 14A | Proxy statement | Apr 3, 2025 | May 15, 2025 |
| DEFA14A | Additional proxy material | Apr 8, 2024 | — |
| DEFA14A | Additional proxy material | Mar 27, 2024 | — |
| DEF 14A | Proxy statement | Mar 27, 2024 | May 8, 2024 |
| DEFA14A | Additional proxy material | Apr 6, 2023 | — |
| DEF 14A | Proxy statement | Apr 6, 2023 | — |
| DEFA14A | Additional proxy material | Mar 18, 2022 | — |
| DEF 14A | Proxy statement | Mar 18, 2022 | Apr 27, 2022 |
| DEFA14A | Additional proxy material | Apr 12, 2021 | — |
| DEF 14A | Proxy statement | Apr 12, 2021 | May 26, 2021 |
| DEFA14A | Additional proxy material | Apr 17, 2020 | — |
| DEF 14A | Proxy statement | Apr 17, 2020 | Dec 31, 2019 |
| DEFA14A | Additional proxy material | Apr 12, 2019 | — |
| DEF 14A | Proxy statement | Apr 12, 2019 | May 22, 2019 |
| DEF 14A | Proxy statement | Apr 13, 2018 | May 23, 2018 |
Showing 18 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- State Commercial Banks (SIC 6022)
- Listed as
- COLB (Nasdaq)
- Fiscal year ends
- December 31
- Incorporated in
- WA
- Headquarters
- Tacoma, WA
- SEC filer status
- Large accelerated filer
- SEC CIK
- 887343
- Former names
- COLUMBIA BANKING SYSTEM INC (until May 3, 2019)
Other State Commercial Banks companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.