FIRST INTERSTATE BANCSYSTEM INC — All Filings
1,000 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-K
10-K/A
10-K405
10-K405/A
10-Q
10-Q/A
11-K
11-K/A
13F-HR
144
144/A
15-12G
15-15D
3
3/A
305B2
4
4/A
424B1
424B3
424B4
424B5
425
5
5/A
8-A12B
8-A12B/A
8-A12G
8-A12G/A
8-K
8-K/A
ARS
CERTNAS
CORRESP
DEF 14A
DEFA14A
EFFECT
FWP
NT 10-K
POS AM
PRE 14A
PRER14A
REGDEX
RW
RW WD
S-1
S-1/A
S-1MEF
S-3
S-3ASR
S-4
S-4/A
S-8
S-8 POS
SC 13D
SC 13D/A
SC 13G
SC 13G/A
SCHEDULE 13G
SCHEDULE 13G/A
UPLOAD
| Form | Description | Accession Number | Filed | Period |
|---|---|---|---|---|
| 4 | 4 | 0001493152-26-013130 | Mar 27, 2026 | Mar 26, 2026 |
| SCHEDULE 13G/A | — | 0000102909-26-000489 | Mar 26, 2026 | — |
| 4 | FORM 4 | 0002071416-26-000004 | Mar 18, 2026 | Mar 16, 2026 |
| 4 | FORM 4 | 0001697127-26-000005 | Mar 18, 2026 | Mar 16, 2026 |
| 4 | FORM 4 | 0002042435-26-000004 | Mar 18, 2026 | Mar 16, 2026 |
| 4 | FORM 4 | 0001930719-26-000004 | Mar 18, 2026 | Mar 16, 2026 |
| 4 | FORM 4 | 0002003084-26-000004 | Mar 18, 2026 | Mar 16, 2026 |
| 4 | FORM 4 | 0002090710-26-000002 | Mar 17, 2026 | Mar 15, 2026 |
| 4 | FORM 4 | 0001930719-26-000002 | Mar 17, 2026 | Mar 15, 2026 |
| 4 | FORM 4 | 0002042435-26-000002 | Mar 17, 2026 | Mar 15, 2026 |
| 4 | FORM 4 | 0001820031-26-000002 | Mar 17, 2026 | Mar 15, 2026 |
| 4 | FORM 4 | 0002003084-26-000002 | Mar 17, 2026 | Mar 15, 2026 |
| 4 | FORM 4 | 0001697127-26-000003 | Mar 17, 2026 | Mar 15, 2026 |
| 4 | FORM 4 | 0002071416-26-000002 | Mar 17, 2026 | Mar 15, 2026 |
| SCHEDULE 13G/A | — | 0000102909-26-000344 | Mar 5, 2026 | — |
| 10-K | 10-K | 0000860413-26-000011 | Feb 26, 2026 | Dec 31, 2025 |
| 5 | 5 | 0001493152-26-007249 | Feb 18, 2026 | Dec 31, 2025 |
| 5 | 5 | 0001493152-26-007236 | Feb 17, 2026 | Dec 31, 2025 |
| 5 | 5 | 0001493152-26-007141 | Feb 17, 2026 | Dec 31, 2025 |
| 5 | 5 | 0001493152-26-007143 | Feb 17, 2026 | Dec 31, 2025 |
| 144 | — | 0001959173-26-000865 | Feb 11, 2026 | — |
| 144 | — | 0001950047-26-000877 | Feb 3, 2026 | — |
| SCHEDULE 13G/A | — | 0000102909-26-000211 | Jan 30, 2026 | — |
| 8-K | 8-K | 0000860413-26-000007 | Jan 28, 2026 | — |
| SCHEDULE 13G/A | — | 0002012383-26-000039 | Jan 8, 2026 | — |
| 4 | 4 | 0001493152-26-000677 | Jan 6, 2026 | Jan 5, 2026 |
| 4 | FORM 4 | 0000860413-26-000002 | Jan 6, 2026 | Dec 8, 2025 |
| 144 | — | 0001958244-26-000008 | Jan 5, 2026 | — |
| 4 | 4 | 0001493152-25-027706 | Dec 15, 2025 | Dec 8, 2025 |
| 4 | 4 | 0001493152-25-027028 | Dec 10, 2025 | Dec 8, 2025 |
| 4 | 4 | 0001493152-25-026182 | Dec 4, 2025 | Dec 3, 2025 |
| 4 | 4 | 0001493152-25-025519 | Dec 1, 2025 | — |
| 4 | FORM 4 | 0001198518-25-000009 | Nov 25, 2025 | Nov 21, 2025 |
| 4 | FORM 4 | 0002090710-25-000010 | Nov 24, 2025 | — |
| 144 | — | 0001908848-25-000006 | Nov 24, 2025 | — |
| 8-K | 8-K | 0000860413-25-000168 | Nov 18, 2025 | Nov 14, 2025 |
| 4 | FORM 4 | 0001198518-25-000006 | Nov 14, 2025 | Nov 12, 2025 |
| 4 | FORM 4 | 0001198518-25-000004 | Nov 12, 2025 | Sep 9, 2025 |
| SCHEDULE 13G | — | 0000902219-25-000402 | Nov 12, 2025 | — |
| 144 | — | 0001950047-25-008696 | Nov 12, 2025 | — |
| 144 | — | 0001950047-25-008618 | Nov 10, 2025 | — |
| 10-Q | 10-Q | 0000860413-25-000165 | Nov 6, 2025 | Sep 30, 2025 |
| SCHEDULE 13G/A | — | 0001023875-25-000029 | Nov 4, 2025 | — |
| 4 | — | 0001493152-25-020655 | Nov 3, 2025 | — |
| 4 | — | 0001493152-25-020651 | Nov 3, 2025 | — |
| 144 | — | 0001950047-25-008406 | Nov 3, 2025 | — |
| 4 | 4 | 0001493152-25-020116 | Oct 29, 2025 | — |
| 144 | — | 0001958244-25-004420 | Oct 29, 2025 | — |
| 8-K | 8-K | 0000860413-25-000160 | Oct 29, 2025 | — |
| 8-K | 8-K | 0000860413-25-000155 | Oct 16, 2025 | — |