COLUMBIA BANKING SYSTEM, INC. — All Filings
1,001 total filings on record
Public companies registered with the SEC are required to file periodic reports, disclosures, and notices throughout the year. The most important are the 10-K (annual report), 10-Q (quarterly report), and 8-K (material event notice). Use the filters below to narrow by form type.
All
10-C
10-K
10-K/A
10-K405
10-Q
10-Q/A
11-K
144
3
3/A
4
4/A
424B1
424B3
424B5
425
5
8-K
8-K/A
ARS
CORRESP
DEF 14A
DEFA14A
DEFM14A
DFAN14A
EFFECT
POS AM
PRE 14A
S-2
S-2/A
S-2MEF
S-3
S-3ASR
S-3MEF
S-4
S-4/A
S-8
S-8 POS
SC 13G
SC 13G/A
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| SCHEDULE 13G/A | — | 0000102909-26-001080 | Mar 26, 2026 | — |
| 4/A | FORM 4/A | 0000887343-26-000107 | Mar 20, 2026 | Mar 13, 2026 |
| 4/A | FORM 4/A | 0000887343-26-000106 | Mar 20, 2026 | Mar 13, 2026 |
| 4 | FORM 4 | 0001133099-26-000005 | Mar 17, 2026 | Mar 16, 2026 |
| 4 | FORM 4 | 0001550429-26-000002 | Mar 17, 2026 | Mar 13, 2026 |
| 4 | FORM 4 | 0001606248-26-000002 | Mar 17, 2026 | Mar 13, 2026 |
| 4 | FORM 4 | 0001689701-26-000004 | Mar 17, 2026 | Mar 13, 2026 |
| 4 | FORM 4 | 0001759802-26-000008 | Mar 17, 2026 | Mar 13, 2026 |
| 4 | FORM 4 | 0001798077-26-000002 | Mar 17, 2026 | Mar 13, 2026 |
| 4 | FORM 4 | 0001796657-26-000005 | Mar 17, 2026 | Mar 13, 2026 |
| 4 | FORM 4 | 0001740374-26-000002 | Mar 17, 2026 | Mar 13, 2026 |
| 4 | FORM 4 | 0001810107-26-000007 | Mar 17, 2026 | Mar 13, 2026 |
| 4 | FORM 4 | 0001619728-26-000003 | Mar 17, 2026 | Mar 13, 2026 |
| 4 | FORM 4 | 0001955918-26-000003 | Mar 17, 2026 | Mar 13, 2026 |
| 4 | FORM 4 | 0000887343-26-000103 | Mar 5, 2026 | Mar 3, 2026 |
| 144 | — | 0001959173-26-001859 | Mar 4, 2026 | — |
| 144 | — | 0001959173-26-001788 | Mar 3, 2026 | — |
| 4 | FORM 4 | 0000887343-26-000102 | Mar 2, 2026 | Mar 1, 2026 |
| 4 | FORM 4 | 0000887343-26-000100 | Mar 2, 2026 | Mar 1, 2026 |
| 4 | FORM 4 | 0001689701-26-000002 | Mar 2, 2026 | Mar 1, 2026 |
| 4 | FORM 4 | 0001759802-26-000006 | Mar 2, 2026 | Mar 1, 2026 |
| 4 | FORM 4 | 0000887343-26-000098 | Mar 2, 2026 | Mar 1, 2026 |
| 4 | FORM 4 | 0000887343-26-000096 | Mar 2, 2026 | Mar 1, 2026 |
| 4 | FORM 4 | 0000887343-26-000094 | Mar 2, 2026 | Mar 1, 2026 |
| 4 | FORM 4 | 0001810107-26-000005 | Mar 2, 2026 | Mar 1, 2026 |
| 4 | FORM 4 | 0000887343-26-000092 | Mar 2, 2026 | Mar 1, 2026 |
| 4 | FORM 4 | 0000887343-26-000090 | Mar 2, 2026 | Mar 1, 2026 |
| 10-K | 10-K | 0000887343-26-000088 | Feb 26, 2026 | Dec 31, 2025 |
| 4 | FORM 4 | 0000887343-26-000083 | Feb 20, 2026 | Feb 18, 2026 |
| 4 | FORM 4 | 0002099171-26-000002 | Feb 20, 2026 | Feb 18, 2026 |
| 4 | FORM 4 | 0000887343-26-000081 | Feb 20, 2026 | Feb 18, 2026 |
| 4 | FORM 4 | 0000887343-26-000079 | Feb 20, 2026 | Feb 18, 2026 |
| 4 | FORM 4 | 0001759802-26-000004 | Feb 20, 2026 | Feb 18, 2026 |
| 4 | FORM 4 | 0000887343-26-000077 | Feb 20, 2026 | Feb 18, 2026 |
| 4 | FORM 4 | 0000887343-26-000075 | Feb 20, 2026 | Feb 18, 2026 |
| 4 | FORM 4 | 0000887343-26-000073 | Feb 20, 2026 | Feb 18, 2026 |
| 4 | FORM 4 | 0000887343-26-000071 | Feb 20, 2026 | Feb 18, 2026 |
| 4 | FORM 4 | 0000887343-26-000069 | Feb 20, 2026 | Feb 18, 2026 |
| 4 | FORM 4 | 0000887343-26-000067 | Feb 20, 2026 | Feb 18, 2026 |
| 4 | FORM 4 | 0000887343-26-000065 | Feb 20, 2026 | Feb 18, 2026 |
| 4 | FORM 4 | 0000887343-26-000063 | Feb 18, 2026 | Feb 15, 2026 |
| 4 | FORM 4 | 0000887343-26-000061 | Feb 18, 2026 | Feb 15, 2026 |
| 4 | FORM 4 | 0000887343-26-000059 | Feb 18, 2026 | Feb 15, 2026 |
| 4 | FORM 4 | 0000887343-26-000057 | Feb 18, 2026 | Feb 15, 2026 |
| 4 | FORM 4 | 0000887343-26-000055 | Feb 18, 2026 | Feb 15, 2026 |
| 4 | FORM 4 | 0000887343-26-000053 | Feb 18, 2026 | Feb 15, 2026 |
| 4 | FORM 4 | 0000887343-26-000051 | Feb 18, 2026 | Feb 15, 2026 |
| 4 | FORM 4 | 0000887343-26-000049 | Feb 18, 2026 | Feb 15, 2026 |
| 4 | FORM 4 | 0000887343-26-000047 | Feb 18, 2026 | Feb 15, 2026 |
| 8-K | 8-K | 0000887343-26-000039 | Feb 13, 2026 | — |