# Filing Detail

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
SEC Accession No. 0001193125-24-078789
Filing Date
2024-03-27
Accepted
2024-03-27 16:03:58
Documents
3

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | DEFA14A | d799891ddefa14a.htm | DEFA14A | 11124
2 | GRAPHIC | g799891g01x01.jpg | GRAPHIC | 358176
3 | GRAPHIC | g799891g02x02.jpg | GRAPHIC | 362645
| Complete submission text file | 0001193125-24-078789.txt |  | 1005320

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.: 24790541
SIC: 6022 State Commercial Banks
(CF Office: 02 Finance)