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 |
|---|---|---|---|
| 10-Q | Quarterly report | Nov 5, 2026 | Sep 30, 2026 |
| 4 | Insider transaction | Oct 30, 2026 | Oct 29, 2026 |
| 144 | Notice of proposed sale | Oct 29, 2026 | — |
| 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 |
| 4 | Insider transaction | Sep 15, 2026 | Sep 14, 2026 |
| 4 | Insider transaction | Sep 8, 2026 | Sep 4, 2026 |
| 4 | Insider transaction | Sep 4, 2026 | Sep 2, 2026 |
| 3 | Initial insider ownership | Sep 2, 2026 | Sep 1, 2026 |
| 4 | Insider transaction | Aug 18, 2026 | Aug 14, 2026 |
| 8-K |
Current report
Other events
|
Aug 14, 2026 | Aug 14, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 13, 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 |
| 4 | Insider transaction | Jul 2, 2026 | Jun 30, 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 |
| 4 | Insider transaction | Jun 16, 2026 | Jun 15, 2026 |
| 11-K/A | Filing | Jun 16, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jun 10, 2026 | Jun 8, 2026 |
| 144 | Notice of proposed sale | Jun 8, 2026 | — |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 4 | Insider transaction | May 18, 2026 | May 14, 2026 |
| 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 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Apr 23, 2026 | Apr 23, 2026 |
| 4 | Insider transaction | Apr 16, 2026 | Apr 15, 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 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 26, 2026 | — |
| 4/A | Form 4/a | Mar 20, 2026 | Mar 13, 2026 |
| 4/A | Form 4/a | Mar 20, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 16, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 17, 2026 | Mar 13, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 3, 2026 |
| 144 | Notice of proposed sale | Mar 4, 2026 | — |
| 144 | Notice of proposed sale | Mar 3, 2026 | — |
| 4 | Insider transaction | Mar 2, 2026 | Mar 1, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Mar 1, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Mar 1, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Mar 1, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Mar 1, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Mar 1, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Mar 1, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Mar 1, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Mar 1, 2026 |
| 4 | Insider transaction | Mar 2, 2026 | Mar 1, 2026 |
| 10-K | Annual report | Feb 26, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 20, 2026 | Feb 18, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 15, 2026 |
| 8-K |
Current report
Other events
|
Feb 13, 2026 | Feb 13, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | Feb 10, 2026 | — |
| 4 | Insider transaction | Feb 5, 2026 | Dec 3, 2025 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Feb 2, 2026 |
| 4 | Insider transaction | Feb 3, 2026 | Jan 30, 2026 |
| 144 | Notice of proposed sale | Jan 30, 2026 | — |
| 4 | Insider transaction | Jan 22, 2026 | Jan 20, 2026 |
| 4 | Insider transaction | Jan 22, 2026 | Jan 20, 2026 |
| 4 | Insider transaction | Jan 22, 2026 | Jan 20, 2026 |
| 4 | Insider transaction | Jan 22, 2026 | Jan 20, 2026 |
| 4 | Insider transaction | Jan 22, 2026 | Jan 20, 2026 |
| 4 | Insider transaction | Jan 22, 2026 | Jan 20, 2026 |
| 4 | Insider transaction | Jan 22, 2026 | Jan 20, 2026 |
| 4 | Insider transaction | Jan 22, 2026 | Jan 20, 2026 |
| 4 | Insider transaction | Jan 22, 2026 | Jan 20, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jan 22, 2026 | Jan 22, 2026 |
| 4 | Insider transaction | Dec 31, 2025 | Dec 31, 2025 |
| 3 | Initial insider ownership | Dec 31, 2025 | Dec 31, 2025 |
| 8-K |
Current report
Regulation FD disclosure
|
Dec 31, 2025 | Dec 31, 2025 |
| 3 | Initial insider ownership | Dec 1, 2025 | Nov 20, 2025 |
| 3 | Initial insider ownership | Dec 1, 2025 | Nov 20, 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 |
| 4 | Insider transaction | Nov 6, 2025 | Nov 5, 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 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 31, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 31, 2025 |
| 4 | Insider transaction | Sep 3, 2025 | Aug 31, 2025 |
| 3 | Initial insider ownership | Sep 3, 2025 | Aug 31, 2025 |
| 3 | Initial insider ownership | Sep 3, 2025 | Aug 31, 2025 |
| 3 | Initial insider ownership | Sep 3, 2025 | Aug 31, 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 |
| 4 | Insider transaction | Jul 31, 2025 | Jul 29, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Jul 24, 2025 | Jul 24, 2025 |
| 4 | Insider transaction | Jul 23, 2025 | Jul 22, 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 | — |
| 3 | Initial insider ownership | Jun 9, 2025 | Jun 2, 2025 |
| UPLOAD | Letter from the SEC | Jun 4, 2025 | — |
| 4 | Insider transaction | Jun 3, 2025 | Jun 2, 2025 |
| S-4 | Registration for a merger or exchange | May 28, 2025 | — |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 2025 |
| 4 | Insider transaction | May 16, 2025 | May 15, 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 |
| SCHEDULE 13G | Ownership over 5% (passive) | May 13, 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 |
| 4/A | Form 4/a | Mar 14, 2025 | Feb 25, 2025 |
| 4/A | Form 4/a | Mar 14, 2025 | Feb 25, 2025 |
| 4/A | Form 4/a | Mar 14, 2025 | Feb 25, 2025 |
| 4/A | Form 4/a | Mar 14, 2025 | Feb 25, 2025 |
| 4 | Insider transaction | Mar 5, 2025 | Mar 4, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Feb 28, 2025 |
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.