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 | — | 0000902219-26-000055 | Feb 10, 2026 | — |
| 4 | FORM 4 | 0001133099-26-000003 | Feb 5, 2026 | Dec 3, 2025 |
| 4 | FORM 4 | 0001759802-26-000002 | Feb 4, 2026 | Feb 2, 2026 |
| 4 | FORM 4 | 0000887343-26-000026 | Feb 4, 2026 | Feb 2, 2026 |
| 4 | FORM 4 | 0000887343-26-000034 | Feb 4, 2026 | Feb 2, 2026 |
| 4 | FORM 4 | 0001810107-26-000002 | Feb 4, 2026 | Feb 2, 2026 |
| 4 | FORM 4 | 0001796657-26-000002 | Feb 4, 2026 | Feb 2, 2026 |
| 4 | FORM 4 | 0000887343-26-000030 | Feb 4, 2026 | Feb 2, 2026 |
| 4 | FORM 4 | 0000887343-26-000036 | Feb 4, 2026 | Feb 2, 2026 |
| 4 | FORM 4 | 0000887343-26-000032 | Feb 4, 2026 | Feb 2, 2026 |
| 4 | FORM 4 | 0000887343-26-000028 | Feb 4, 2026 | Feb 2, 2026 |
| 4 | FORM 4 | 0000887343-26-000024 | Feb 3, 2026 | Jan 30, 2026 |
| 144 | — | 0001959173-26-000499 | Jan 30, 2026 | — |
| 4 | FORM 4 | 0000887343-26-000021 | Jan 22, 2026 | Jan 20, 2026 |
| 4 | FORM 4 | 0000887343-26-000020 | Jan 22, 2026 | Jan 20, 2026 |
| 8-K | 8-K | 0000887343-26-000012 | Jan 22, 2026 | — |
| 4 | FORM 4 | 0000887343-26-000013 | Jan 22, 2026 | Jan 20, 2026 |
| 4 | FORM 4 | 0000887343-26-000019 | Jan 22, 2026 | Jan 20, 2026 |
| 4 | FORM 4 | 0000887343-26-000014 | Jan 22, 2026 | Jan 20, 2026 |
| 4 | FORM 4 | 0000887343-26-000015 | Jan 22, 2026 | Jan 20, 2026 |
| 4 | FORM 4 | 0000887343-26-000016 | Jan 22, 2026 | Jan 20, 2026 |
| 4 | FORM 4 | 0000887343-26-000017 | Jan 22, 2026 | Jan 20, 2026 |
| 4 | FORM 4 | 0000887343-26-000018 | Jan 22, 2026 | Jan 20, 2026 |
| 8-K | 8-K | 0000887343-25-000280 | Dec 31, 2025 | — |
| 3 | FORM 3 | 0000887343-25-000282 | Dec 31, 2025 | — |
| 4 | FORM 4 | 0000887343-25-000284 | Dec 31, 2025 | — |
| 3 | FORM 3 | 0000887343-25-000277 | Dec 1, 2025 | Nov 20, 2025 |
| 3 | FORM 3 | 0000887343-25-000274 | Dec 1, 2025 | Nov 20, 2025 |
| 8-K | 8-K | 0001193125-25-290691 | Nov 21, 2025 | Nov 19, 2025 |
| 8-K | 8-K | 0000887343-25-000271 | Nov 14, 2025 | — |
| 4 | FORM 4 | 0001133099-25-000010 | Nov 6, 2025 | Nov 5, 2025 |
| 10-Q | 10-Q | 0000887343-25-000268 | Nov 6, 2025 | Sep 30, 2025 |
| 8-K | 8-K | 0001193125-25-264630 | Nov 4, 2025 | Oct 29, 2025 |
| 8-K | 8-K | 0000887343-25-000262 | Oct 30, 2025 | — |
| 4 | FORM 4 | 0000887343-25-000252 | Sep 3, 2025 | Aug 31, 2025 |
| 3 | FORM 3 | 0000887343-25-000247 | Sep 3, 2025 | Aug 31, 2025 |
| 4 | FORM 4 | 0000887343-25-000254 | Sep 3, 2025 | Aug 31, 2025 |
| 8-K/A | 8-K/A | 0000887343-25-000242 | Sep 3, 2025 | Sep 2, 2025 |
| 3 | FORM 3 | 0000887343-25-000243 | Sep 3, 2025 | Aug 31, 2025 |
| 3 | FORM 3 | 0000887343-25-000245 | Sep 3, 2025 | Aug 31, 2025 |
| 4 | FORM 4 | 0000887343-25-000249 | Sep 3, 2025 | Aug 31, 2025 |
| 8-K | 8-K | 0001193125-25-193405 | Sep 2, 2025 | — |
| S-8 | S-8 | 0001193125-25-193446 | Sep 2, 2025 | — |
| 8-K | 8-K | 0000887343-25-000238 | Aug 29, 2025 | — |
| 8-K | 8-K | 0000887343-25-000236 | Aug 15, 2025 | — |
| 8-K | 8-K | 0000887343-25-000229 | Aug 6, 2025 | — |
| 10-Q | 10-Q | 0000887343-25-000233 | Aug 6, 2025 | Jun 30, 2025 |
| 4 | FORM 4 | 0000887343-25-000223 | Jul 31, 2025 | Jul 29, 2025 |
| 8-K | 8-K | 0000887343-25-000221 | Jul 24, 2025 | — |
| 4 | FORM 4 | 0000887343-25-000217 | Jul 23, 2025 | Jul 22, 2025 |