1301 A STREET, TACOMA, WA
Announces Date of Third Quarter 2026 Earnings Release and Conference Call
Changes in Board, Management or Compensation, Reg. FD
Reports Second Quarter 2026 Results
Announces Date of Second Quarter 2026 Earnings Release and Conference Call
Announces $0.37 Per Common Share Dividend
Columbia Banking System, Inc. 2026 Annual Meeting Voting Results
Reports First Quarter 2026 Results
Annual Report to Security Holders
Q2
Q1
FY 2024
Q3
FY 2023
Registration Statement for Securities to be Offered to Employees
Prospectus Filed Pursuant to Rule 425
Prospectus filed pursuant to Rule 424(b)(3)
Effectiveness Notice
S-4/A
S-4
Additional Proxy Materials
Definitive Proxy Statement
Statement of Changes in Beneficial Ownership
Initial Statement of Beneficial Ownership
Amended Schedule 13G - Ownership Report
Annual Report of Employee Stock Purchase
Correspondence
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