Wellington Management Group LLP 13D and 13G filings for Columbia Banking System, Inc.:
- Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
- Shares have been adjusted for stock splits.
| Reported DateTime | Transaction Date | Type | Company Symbol | Filed By Symbol | Shares Owned % Owned | Shares Vs. Prev Report | View |
| 2026-08-13 4:08 pm Sale | 2026-06-30 | 13G | COLUMBIA BANKING SYSTEMS INC COLB | Wellington Management Group LLP | 11,686,430 4.100% | -6,419,798 (-35.46%) | Filing |
| 2026-02-10 11:19 am Purchase | 2025-12-31 | 13G | COLUMBIA BANKING SYSTEMS INC COLB | Wellington Management Group LLP | 18,106,228 6.100% | 18,106,228 (New Position) | Filing |