Form 3 - Initial statement of beneficial ownership of securities:
SEC Accession No. 0000887343-25-000277
Filing Date
2025-12-01
Accepted
2025-12-01 20:03:41
Documents
3
Period of Report
2025-11-20

Document Format Files

Seq Description Document Type Size
1 FORM 3 wk-form3_1764637417.html 3  
1 FORM 3 wk-form3_1764637417.xml 3 5564
2 EX-24 a2025-11x20powerofattorn.htm EX-24 644
3 GRAPHIC a2025-11x20powerofattorn001.jpg GRAPHIC 233930
  Complete submission text file 0000887343-25-000277.txt   330012
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 C/O COLUMBIA BANKING SYSTEM, INC. 1301 A STREET TACOMA WA 98402
Business Address
Lakely Brock (Reporting) CIK: 0001740374 (see all company filings)

Type: 3 | Act: 34 | File No.: 000-20288 | Film No.: 251541305