Form 8-K - Current report:
SEC Accession No. 0000887343-26-000143
Filing Date
2026-05-15
Accepted
2026-05-15 13:42:40
Documents
13
Period of Report
2026-05-15
Items
Item 8.01: Other Events
Item 9.01: Financial Statements and Exhibits

Document Format Files

Seq Description Document Type Size
1 8-K colb-20260515.htm   iXBRL 8-K 22056
2 PRESS RELEASE ANNOUNCING QUARTERLY CASH DIVIDEND colbex991dividendannouncem.htm EX-99.1 5061
6 GRAPHIC image_0.jpg GRAPHIC 53601
  Complete submission text file 0000887343-26-000143.txt   217258

Data Files

Seq Description Document Type Size
3 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT colb-20260515.xsd EX-101.SCH 1837
4 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT colb-20260515_lab.xml EX-101.LAB 21880
5 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT colb-20260515_pre.xml EX-101.PRE 12548
16 EXTRACTED XBRL INSTANCE DOCUMENT colb-20260515_htm.xml XML 2705
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: 8-K | Act: 34 | File No.: 000-20288 | Film No.: 26985384
SIC: 6022 State Commercial Banks
(CF Office: 02 Finance)