# Filing Detail

Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material:
SEC Accession No. 0001140361-21-012372
Filing Date
2021-04-12
Accepted
2021-04-12 09:05:59
Documents
3

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | DEFA14A | nc10022254x2_defa14a.htm | DEFA14A | 16284
2 |  | nc10022254x2_nc1.jpg | GRAPHIC | 1914481
3 |  | nc10022254x2_nc2.jpg | GRAPHIC | 1674214
| Complete submission text file | 0001140361-21-012372.txt |  | 4659557

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.: 21819541
SIC: 6022 State Commercial Banks