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 |
|---|---|---|---|
| 11-K | Employee savings plan report | Jun 25, 2026 | Dec 31, 2025 |
| 11-K/A | Filing | Jun 16, 2026 | Dec 31, 2025 |
| 11-K | Employee savings plan report | Mar 31, 2026 | Dec 31, 2025 |
| 425 | Filing | Jul 11, 2025 | — |
| 11-K | Employee savings plan report | Jun 27, 2025 | Dec 31, 2024 |
| EFFECT | Filing | Jun 16, 2025 | — |
| CORRESP | Letter to the SEC | Jun 13, 2025 | — |
| UPLOAD | Letter from the SEC | Jun 4, 2025 | — |
| 425 | Filing | May 6, 2025 | — |
| 425 | Filing | Apr 25, 2025 | — |
| 425 | Filing | Apr 25, 2025 | — |
| 425 | Filing | Apr 24, 2025 | — |
| 425 | Filing | Apr 24, 2025 | — |
| 425 | Filing | Apr 24, 2025 | — |
| 425 | Filing | Apr 24, 2025 | — |
| 425 | Filing | Apr 24, 2025 | — |
| 425 | Filing | Apr 23, 2025 | — |
| 11-K | Employee savings plan report | Mar 31, 2025 | Dec 31, 2024 |
| 11-K | Employee savings plan report | Jun 25, 2024 | Dec 31, 2023 |
| 11-K | Employee savings plan report | Jun 28, 2023 | Dec 31, 2022 |
| 425 | Prospectuses and communications, business combinations | Jan 21, 2022 | — |
| 425 | Filing | Jan 20, 2022 | — |
| 425 | Filing | Dec 10, 2021 | — |
| 425 | Filing | Dec 10, 2021 | — |
| 425 | Filing | Dec 9, 2021 | — |
| 425 | Filing | Dec 9, 2021 | — |
| 425 | Filing | Dec 8, 2021 | — |
| 425 | Filing | Dec 8, 2021 | — |
| EFFECT | Filing | Dec 3, 2021 | — |
| CORRESP | Letter to the SEC | Dec 2, 2021 | — |
| UPLOAD | Letter from the SEC | Nov 29, 2021 | — |
| 425 | Prospectuses and communications, business combinations | Oct 29, 2021 | — |
| 425 | Filing | Oct 15, 2021 | — |
| 425 | Filing | Oct 15, 2021 | — |
| 425 | Filing | Oct 14, 2021 | — |
| 425 | Filing | Oct 14, 2021 | — |
| 425 | Filing | Oct 14, 2021 | — |
| 425 | Filing | Oct 12, 2021 | — |
| 425 | Filing | Oct 12, 2021 | — |
| EFFECT | Filing | Aug 17, 2021 | — |
| CORRESP | Letter to the SEC | Aug 13, 2021 | — |
| UPLOAD | Letter from the SEC | Aug 9, 2021 | — |
| 425 | Prospectuses and communications, business combinations | Jul 29, 2021 | — |
| 425 | Filing | Jun 24, 2021 | — |
| 425 | Form 8-k | Oct 31, 2017 | — |
| 425 | 8-k | Oct 27, 2017 | — |
| 425 | 8-k | Jul 27, 2017 | — |
| 425 | 8-k | Jun 8, 2017 | — |
Showing 48 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.
New to this? Read What Are SEC Filings? 10-K, 10-Q, 8-K and Other Forms Explained.
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.