Form 4 - Statement of changes in beneficial ownership of securities:
SEC Accession No. 0000887343-25-000249
Filing Date
2025-09-03
Accepted
2025-09-03 21:31:11
Documents
1
Period of Report
2025-08-31

Document Format Files

Seq Description Document Type Size
1 FORM 4 wk-form4_1756949467.html 4  
1 FORM 4 wk-form4_1756949467.xml 4 5265
  Complete submission text file 0000887343-25-000249.txt   6755
Mailing Address 1301 A STREET TACOMA WA 98402
Business Address 1301 A STREET TACOMA WA 98402 2533051900
COLUMBIA BANKING SYSTEM, INC. (Issuer) CIK: 0000887343 (see all company filings)

EIN.: 911422237 | State of Incorp.: WA | Fiscal Year End: 1231
SIC: 6022 State Commercial Banks
(CF Office: 02 Finance)

Mailing Address 355 S. GRAND AVE SUITE 1750 LOS ANGELES CA 90071
Business Address
MITCHELL M CHRISTIAN (Reporting) CIK: 0001284574 (see all company filings)

Type: 4 | Act: 34 | File No.: 000-20288 | Film No.: 251291738