# Filing Detail

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
SEC Accession No. 0000887343-25-000154
Filing Date
2025-04-03
Accepted
2025-04-03 16:35:40
Documents
4

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | DEFA14A | defa14a2025.htm | DEFA14A | 11406
2 | GRAPHIC | columbiabankingsysteminc_v.jpg | GRAPHIC | 519036
3 | GRAPHIC | columbiabankingsysteminc_va.jpg | GRAPHIC | 539118
4 | GRAPHIC | image_2.jpg | GRAPHIC | 2326
| Complete submission text file | 0000887343-25-000154.txt |  | 1472673

Mailing Address 1301 A STREET TACOMA WA 98402
Business Address 1301 A STREET TACOMA WA 98402 2533051900
COLUMBIA BANKING SYSTEM, INC. (Filer) CIK: 0000887343 (see all company filings)

EIN.: 911422237 | State of Incorp.: WA | Fiscal Year End: 1231
Type: DEFA14A | Act: 34 | File No.: 000-20288 | Film No.: 25810135
SIC: 6022 State Commercial Banks
(CF Office: 02 Finance)