Columbia Banking System, Inc. SEC filings COLB
Columbia Banking System, Inc. has 1,000 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 Aug 4, 2026, covering the quarter ended Jun 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 |
|---|---|---|---|
| 8-K |
Current report
Officer or director change
|
Oct 27, 2026 | Oct 27, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 22, 2026 | Oct 22, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 30, 2026 | Sep 30, 2026 |
| 8-K |
Current report
Other events
|
Aug 14, 2026 | Aug 14, 2026 |
| 10-Q | Quarterly report | Aug 4, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Jul 30, 2026 | Jul 28, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 23, 2026 | Jul 23, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Jul 1, 2026 | Jun 30, 2026 |
| 11-K | Employee savings plan report | Jun 25, 2026 | Dec 31, 2025 |
| 11-K/A | Filing | Jun 16, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Other events
|
May 15, 2026 | May 15, 2026 |
| 8-K |
Current report
Shareholder vote results
|
May 15, 2026 | May 14, 2026 |
| 10-Q | Quarterly report | May 5, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 23, 2026 | Apr 23, 2026 |
| ARS | Annual report to shareholders | Mar 31, 2026 | Dec 31, 2025 |
| DEF 14A | Proxy statement | Mar 31, 2026 | May 14, 2026 |
| DEFA14A | Additional proxy material | Mar 31, 2026 | — |
| 11-K | Employee savings plan report | Mar 31, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 31, 2026 | Mar 31, 2026 |
| 10-K | Annual report | Feb 26, 2026 | Dec 31, 2025 |
| 8-K |
Current report
Other events
|
Feb 13, 2026 | Feb 13, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 22, 2026 | Jan 22, 2026 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 31, 2025 | Dec 31, 2025 |
| 8-K |
Current report
Officer or director change
|
Nov 21, 2025 | Nov 19, 2025 |
| 8-K |
Current report
Other events
|
Nov 14, 2025 | Nov 14, 2025 |
| 10-Q | Quarterly report | Nov 6, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Nov 4, 2025 | Oct 29, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 30, 2025 | Oct 30, 2025 |
| 8-K/A | Amended current report | Sep 3, 2025 | Sep 2, 2025 |
| S-8 | Employee stock plan registration | Sep 2, 2025 | — |
| 8-K |
Current report
Acquisition or sale of assets, Officer or director change, Regulation FD disclosure
|
Sep 2, 2025 | Sep 2, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Aug 29, 2025 | Aug 29, 2025 |
| 8-K |
Current report
Other events
|
Aug 15, 2025 | Aug 15, 2025 |
| 10-Q | Quarterly report | Aug 6, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Aug 6, 2025 | Aug 6, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 24, 2025 | Jul 24, 2025 |
| 8-K |
Current report
Shareholder vote results, Regulation FD disclosure
|
Jul 22, 2025 | Jul 21, 2025 |
| 425 | Filing | Jul 11, 2025 | — |
| 8-K |
Current report
Other events
|
Jul 11, 2025 | Jul 11, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 30, 2025 | Jun 30, 2025 |
| 11-K | Employee savings plan report | Jun 27, 2025 | Dec 31, 2024 |
| EFFECT | Filing | Jun 16, 2025 | — |
| 424B3 | Prospectus | Jun 16, 2025 | — |
| CORRESP | Letter to the SEC | Jun 13, 2025 | — |
| S-4/A | Filing | Jun 13, 2025 | — |
| UPLOAD | Letter from the SEC | Jun 4, 2025 | — |
| S-4 | Registration for a merger or exchange | May 28, 2025 | — |
| 8-K |
Current report
Other events
|
May 16, 2025 | May 16, 2025 |
| 8-K |
Current report
Shareholder vote results
|
May 15, 2025 | May 15, 2025 |
| 10-Q | Quarterly report | May 6, 2025 | Mar 31, 2025 |
| 425 | Filing | May 6, 2025 | — |
| 8-K |
Current report
Regulation FD disclosure
|
May 5, 2025 | May 5, 2025 |
| 425 | Filing | Apr 25, 2025 | — |
| 8-K |
Current report
Material agreement
|
Apr 25, 2025 | Apr 23, 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 | — |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Apr 23, 2025 | Apr 23, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 23, 2025 | Apr 23, 2025 |
| ARS | Annual report to shareholders | Apr 3, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Apr 3, 2025 | — |
| DEF 14A | Proxy statement | Apr 3, 2025 | May 15, 2025 |
| 8-K |
Current report
Officer or director change, Regulation FD disclosure
|
Apr 2, 2025 | Mar 30, 2025 |
| 11-K | Employee savings plan report | Mar 31, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 31, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 27, 2025 | Mar 27, 2025 |
| 10-K | Annual report | Feb 25, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Other events
|
Feb 14, 2025 | Feb 14, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 23, 2025 | Jan 23, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 31, 2024 | Dec 31, 2024 |
| S-3ASR | Automatic shelf registration | Dec 20, 2024 | — |
| 8-K |
Current report
Other events
|
Nov 15, 2024 | Nov 15, 2024 |
| 10-Q | Quarterly report | Nov 5, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 24, 2024 | Oct 24, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 30, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Other events
|
Aug 12, 2024 | Aug 12, 2024 |
| 10-Q | Quarterly report | Aug 6, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 25, 2024 | Jul 25, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 28, 2024 | Jun 28, 2024 |
| 11-K | Employee savings plan report | Jun 25, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Other events
|
May 13, 2024 | May 13, 2024 |
| S-8 | Employee stock plan registration | May 9, 2024 | — |
| S-8 | Employee stock plan registration | May 9, 2024 | — |
| S-8 | Employee stock plan registration | May 9, 2024 | — |
| 8-K |
Current report
Officer or director change, Shareholder vote results
|
May 9, 2024 | May 8, 2024 |
| 10-Q | Quarterly report | May 7, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 25, 2024 | Apr 25, 2024 |
| DEFA14A | Additional proxy material | Apr 8, 2024 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 1, 2024 | Apr 1, 2024 |
| ARS | Annual report to shareholders | Mar 27, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Mar 27, 2024 | — |
| DEF 14A | Proxy statement | Mar 27, 2024 | May 8, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 5, 2024 | Mar 4, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Mar 4, 2024 | Mar 4, 2024 |
| 10-K | Annual report | Feb 27, 2024 | Dec 31, 2023 |
| 8-K |
Current report
Other events
|
Feb 9, 2024 | Feb 9, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 24, 2024 | Jan 24, 2024 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 29, 2023 | Dec 29, 2023 |
| 8-K | Current report | Nov 13, 2023 | Nov 13, 2023 |
| 10-Q | Quarterly report | Nov 3, 2023 | Sep 30, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Oct 18, 2023 | Oct 18, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 29, 2023 | Sep 29, 2023 |
| 8-K |
Current report
Other events
|
Aug 14, 2023 | Aug 14, 2023 |
| 10-Q | Quarterly report | Aug 3, 2023 | Jun 30, 2023 |
| S-8 | Employee stock plan registration | Jul 25, 2023 | — |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 19, 2023 | Jul 19, 2023 |
| 8-K |
Current report
Regulation FD disclosure
|
Jun 30, 2023 | Jun 30, 2023 |
| 11-K | Employee savings plan report | Jun 28, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Other events
|
Jun 27, 2023 | Jun 27, 2023 |
| 8-K |
Current report
Shareholder vote results
|
May 23, 2023 | May 18, 2023 |
| 8-K |
Current report
Other events
|
May 15, 2023 | May 15, 2023 |
| 10-Q | Quarterly report | May 9, 2023 | Mar 31, 2023 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 26, 2023 | Apr 26, 2023 |
| ARS | Annual report to shareholders | Apr 6, 2023 | Dec 31, 2022 |
| DEFA14A | Additional proxy material | Apr 6, 2023 | — |
| DEF 14A | Proxy statement | Apr 6, 2023 | — |
| 8-K |
Current report
Regulation FD disclosure
|
Apr 3, 2023 | Mar 31, 2023 |
| 8-K/A | Amended current report | Mar 3, 2023 | Feb 28, 2023 |
| S-8 | Employee stock plan registration | Mar 1, 2023 | — |
| 8-K |
Current report
Acquisition or sale of assets, New debt, Officer or director change, Bylaw or fiscal year change, Other events
|
Mar 1, 2023 | Feb 28, 2023 |
| 8-K |
Current report
Other events
|
Feb 27, 2023 | Feb 24, 2023 |
| 10-K | Annual report | Feb 24, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 24, 2023 | Jan 24, 2023 |
| 8-K |
Current report
Material agreement, Other events
|
Jan 10, 2023 | Jan 9, 2023 |
| 8-K |
Current report
Officer or director change
|
Jan 6, 2023 | Dec 31, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Nov 7, 2022 | Nov 7, 2022 |
| 10-Q | Quarterly report | Oct 28, 2022 | Sep 30, 2022 |
| 8-K |
Current report
Other events
|
Oct 26, 2022 | Oct 25, 2022 |
| 8-K |
Current report
Results of operations
|
Oct 20, 2022 | Oct 20, 2022 |
| 8-K |
Current report
Other events
|
Oct 6, 2022 | Oct 5, 2022 |
| 8-K |
Current report
Other events
|
Sep 20, 2022 | Sep 17, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
Sep 2, 2022 | Sep 2, 2022 |
| 10-Q | Quarterly report | Aug 4, 2022 | Jun 30, 2022 |
| 8-K |
Current report
Results of operations, Other events
|
Jul 21, 2022 | Jul 21, 2022 |
| 8-K |
Current report
Regulation FD disclosure
|
May 26, 2022 | May 26, 2022 |
| 10-Q | Quarterly report | May 5, 2022 | Mar 31, 2022 |
| 8-K |
Current report
Shareholder vote results
|
Apr 29, 2022 | Apr 27, 2022 |
| 8-K |
Current report
Results of operations, Other events
|
Apr 21, 2022 | Apr 21, 2022 |
| DEFA14A | Additional proxy material | Mar 18, 2022 | — |
| DEF 14A | Proxy statement | Mar 18, 2022 | Apr 27, 2022 |
| 10-K | Annual report | Feb 25, 2022 | Dec 31, 2021 |
| 8-K |
Current report
Shareholder vote results, Other events
|
Jan 28, 2022 | Jan 26, 2022 |
| 425 | Prospectuses and communications, business combinations | Jan 21, 2022 | — |
| 8-K |
Current report
Results of operations, Other events
|
Jan 21, 2022 | Jan 19, 2022 |
| 425 | Filing | Jan 20, 2022 | — |
| 8-K |
Current report
Other events
|
Jan 20, 2022 | Jan 19, 2022 |
| S-3ASR | Automatic shelf registration | Dec 29, 2021 | — |
| 8-K |
Current report
Other events
|
Dec 29, 2021 | Dec 29, 2021 |
| 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 | — |
| 424B3 | Prospectus | Dec 3, 2021 | — |
| CORRESP | Letter to the SEC | Dec 2, 2021 | — |
| S-4/A | Filing | Dec 2, 2021 | — |
| UPLOAD | Letter from the SEC | Nov 29, 2021 | — |
| S-4 | Registration for a merger or exchange | Nov 22, 2021 | — |
| 10-Q | Quarterly report | Nov 5, 2021 | Sep 30, 2021 |
| 425 | Prospectuses and communications, business combinations | Oct 29, 2021 | — |
| 8-K |
Current report
Results of operations
|
Oct 29, 2021 | Oct 28, 2021 |
| 425 | Filing | Oct 15, 2021 | — |
| 425 | Filing | Oct 15, 2021 | — |
| 8-K |
Current report
Material agreement, Officer or director change
|
Oct 15, 2021 | Oct 11, 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 | — |
| 8-K |
Current report
Other events
|
Oct 12, 2021 | Oct 12, 2021 |
| 8-K |
Current report
Other events
|
Oct 1, 2021 | Sep 30, 2021 |
| 8-K |
Current report
Other events
|
Sep 30, 2021 | Sep 30, 2021 |
| EFFECT | Filing | Aug 17, 2021 | — |
| 424B3 | Prospectus | Aug 17, 2021 | — |
| CORRESP | Letter to the SEC | Aug 13, 2021 | — |
| S-4/A | Filing | Aug 13, 2021 | — |
| UPLOAD | Letter from the SEC | Aug 9, 2021 | — |
| 10-Q | Quarterly report | Aug 6, 2021 | Jun 30, 2021 |
| S-4 | Registration for a merger or exchange | Aug 6, 2021 | — |
| 425 | Prospectuses and communications, business combinations | Jul 29, 2021 | — |
| 8-K |
Current report
Results of operations, Other events
|
Jul 29, 2021 | Jul 29, 2021 |
| 425 | Filing | Jun 24, 2021 | — |
| 8-K |
Current report
Material agreement, Regulation FD disclosure
|
Jun 24, 2021 | Jun 23, 2021 |
| 8-K |
Current report
Shareholder vote results
|
May 28, 2021 | May 26, 2021 |
| 10-Q | Quarterly report | May 6, 2021 | Mar 31, 2021 |
| 8-K |
Current report
Results of operations, Other events
|
Apr 30, 2021 | Apr 29, 2021 |
| DEFA14A | Additional proxy material | Apr 12, 2021 | — |
| DEF 14A | Proxy statement | Apr 12, 2021 | May 26, 2021 |
| 10-K | Annual report | Feb 26, 2021 | Dec 31, 2020 |
| 8-K |
Current report
Results of operations, Other events
|
Jan 28, 2021 | Jan 28, 2021 |
| 8-K |
Current report
Officer or director change
|
Dec 28, 2020 | Dec 21, 2020 |
| 8-K |
Current report
Officer or director change
|
Dec 1, 2020 | Nov 25, 2020 |
| 10-Q | Quarterly report | Nov 5, 2020 | Sep 30, 2020 |
| 8-K |
Current report
Results of operations, Other events
|
Oct 29, 2020 | Oct 29, 2020 |
Showing 200 filings, the most recent 200. 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.