COLB - CIK 0000887343
COLUMBIA BANKING SYSTEM, INC. has filed 1,871 documents with the SEC between 1996 and 2026. The most frequent type is insider trade (982 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.
Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.
| Filing | Type | Filed | Period covered |
|---|---|---|---|
| Major company event | 8-K | 2025-11-14 | 2025-11-14 |
| Insider trade | 4 | 2025-11-06 | 2025-11-05 |
| Quarterly report | 10-Q | 2025-11-06 | 2025-09-30 |
| Major company event | 8-K | 2025-11-04 | 2025-10-29 |
| Major company event | 8-K | 2025-10-30 | 2025-10-30 |
| Insider trade | 4 | 2025-09-03 | 2025-08-31 |
| Insider trade | 4 | 2025-09-03 | 2025-08-31 |
| Insider trade | 4 | 2025-09-03 | 2025-08-31 |
| New insider ownership | 3 | 2025-09-03 | 2025-08-31 |
| New insider ownership | 3 | 2025-09-03 | 2025-08-31 |
| New insider ownership | 3 | 2025-09-03 | 2025-08-31 |
| Major company event (amended) | 8-K/A | 2025-09-03 | 2025-09-02 |
| Employee stock plan | S-8 | 2025-09-02 | - |
| Major company event | 8-K | 2025-09-02 | 2025-09-02 |
| Major company event | 8-K | 2025-08-29 | 2025-08-29 |
| Major company event | 8-K | 2025-08-15 | 2025-08-15 |
| Quarterly report | 10-Q | 2025-08-06 | 2025-06-30 |
| Major company event | 8-K | 2025-08-06 | 2025-08-06 |
| Insider trade | 4 | 2025-07-31 | 2025-07-29 |
| Major company event | 8-K | 2025-07-24 | 2025-07-24 |
| Insider trade | 4 | 2025-07-23 | 2025-07-22 |
| Major company event | 8-K | 2025-07-22 | 2025-07-21 |
| 425 | - | 2025-07-11 | - |
| Major company event | 8-K | 2025-07-11 | 2025-07-11 |
| Major company event | 8-K | 2025-06-30 | 2025-06-30 |
| Employee plan annual report | 11-K | 2025-06-27 | 2024-12-31 |
| EFFECT | - | 2025-06-16 | - |
| 424B3 | - | 2025-06-16 | - |
| Company correspondence | CORRESP | 2025-06-13 | - |
| S-4/A | - | 2025-06-13 | - |
| New insider ownership | 3 | 2025-06-09 | 2025-06-02 |
| SEC correspondence | UPLOAD | 2025-06-04 | - |
| Insider trade | 4 | 2025-06-03 | 2025-06-02 |
| S-4 | - | 2025-05-28 | - |
| Insider trade | 4 | 2025-05-16 | 2025-05-15 |
| Insider trade | 4 | 2025-05-16 | 2025-05-15 |
| Insider trade | 4 | 2025-05-16 | 2025-05-15 |
| Insider trade | 4 | 2025-05-16 | 2025-05-15 |
| Insider trade | 4 | 2025-05-16 | 2025-05-15 |
| Insider trade | 4 | 2025-05-16 | 2025-05-15 |
| Insider trade | 4 | 2025-05-16 | 2025-05-15 |
| Insider trade | 4 | 2025-05-16 | 2025-05-15 |
| Insider trade | 4 | 2025-05-16 | 2025-05-15 |
| Insider trade | 4 | 2025-05-16 | 2025-05-15 |
| Major company event | 8-K | 2025-05-16 | 2025-05-16 |
| Major company event | 8-K | 2025-05-15 | 2025-05-15 |
| SCHEDULE 13G | - | 2025-05-13 | - |
| 425 | - | 2025-05-06 | - |
| Quarterly report | 10-Q | 2025-05-06 | 2025-03-31 |
| Major company event | 8-K | 2025-05-05 | 2025-05-05 |