COLUMBIA BANKING SYSTEM, INC.
SEC Filing List

COLB CIK: 0000887343

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Form	Description	Owner/Filer	Filing Agent	Date	Actions
8-K	Current report filing	Columbia Banking System, Inc.		09/30/2026	View ... Create Alert Filing info Download PDF Copy Link View XBRL Download CSV
4	Statement of changes in beneficial owner...	Machuca Luis	Columbia Banking System, Inc.	09/15/2026	View ... Create Alert Filing info Download PDF Copy Link
4	Statement of changes in beneficial owner...	Machuca Luis	Columbia Banking System, Inc.	09/15/2026	View ... Create Alert Filing info Download PDF Copy Link
4	Statement of changes in beneficial owner...	Gardner Steven R	Columbia Banking System, Inc.	09/08/2026	View ... Create Alert Filing info Download PDF Copy Link
4	Statement of changes in beneficial owner...	Lagomarsino Simone	Columbia Banking System, Inc.	09/04/2026	View ... Create Alert Filing info Download PDF Copy Link
3	Initial statement of beneficial ownershi...	Lagomarsino Simone	Columbia Banking System, Inc.	09/02/2026	View ... Create Alert Filing info Download PDF Copy Link
4	Statement of changes in beneficial owner...	Giem Judi	Columbia Banking System, Inc.	08/18/2026	View ... Create Alert Filing info Download PDF Copy Link
8-K	Current report filing	Columbia Banking System, Inc.		08/14/2026	View ... Create Alert Filing info Download PDF Copy Link View XBRL Download CSV
SCHEDULE 13G/A				08/13/2026	View ... Create Alert Filing info Download PDF Copy Link
10-Q	Quarterly report pursuant to Section 13 ...	Columbia Banking System, Inc.		08/04/2026	View ... Create Alert Filing info Download PDF Copy Link View XBRL Download CSV
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