Form 3 - Initial statement of beneficial ownership of securities:
SEC Accession No. 0000887343-25-000245
Filing Date
2025-09-03
Accepted
2025-09-03 19:46:12
Documents
3
Period of Report
2025-08-31

Document Format Files

Seq Description Document Type Size
1 FORM 3 wk-form3_1756943169.html 3  
1 FORM 3 wk-form3_1756943169.xml 3 1634
2 EX-24 a2025-08x14powerofattorn.htm EX-24 644
3 GRAPHIC a2025-08x14powerofattorn001.jpg GRAPHIC 280619
  Complete submission text file 0000887343-25-000245.txt   390380
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: 3 | Act: 34 | File No.: 000-20288 | Film No.: 251291547