# Filing Detail

Form 8-K - Current report:
SEC Accession No. 0000860413-25-000114
Filing Date
2025-07-29
Accepted
2025-07-29 16:21:32
Documents
37
Period of Report
2025-07-29
Items
Item 2.02: Results of Operations and Financial Condition
Item 7.01: Regulation FD Disclosure
Item 8.01: Other Events
Item 9.01: Financial Statements and Exhibits

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 8-K | fibk-20250729.htm iXBRL | 8-K | 32440
2 | EX-99.1 | fibk-20250630x8kpr.htm | EX-99.1 | 770638
3 | EX-99.2 | jun2025ip.htm | EX-99.2 | 37884
7 | FIBK LOGO | fibslogo2linea04a.jpg | GRAPHIC | 165531
8 | GRAPHIC | jun2025ip001.jpg | GRAPHIC | 138878
9 | GRAPHIC | jun2025ip002.jpg | GRAPHIC | 285433
10 | GRAPHIC | jun2025ip003.jpg | GRAPHIC | 112888
11 | GRAPHIC | jun2025ip004.jpg | GRAPHIC | 99957
12 | GRAPHIC | jun2025ip005.jpg | GRAPHIC | 125013
13 | GRAPHIC | jun2025ip006.jpg | GRAPHIC | 104748
14 | GRAPHIC | jun2025ip007.jpg | GRAPHIC | 192418
15 | GRAPHIC | jun2025ip008.jpg | GRAPHIC | 88566
16 | GRAPHIC | jun2025ip009.jpg | GRAPHIC | 100369
17 | GRAPHIC | jun2025ip010.jpg | GRAPHIC | 84955
18 | GRAPHIC | jun2025ip011.jpg | GRAPHIC | 84908
19 | GRAPHIC | jun2025ip012.jpg | GRAPHIC | 109958
20 | GRAPHIC | jun2025ip013.jpg | GRAPHIC | 76964
21 | GRAPHIC | jun2025ip014.jpg | GRAPHIC | 107906
22 | GRAPHIC | jun2025ip015.jpg | GRAPHIC | 95966
23 | GRAPHIC | jun2025ip016.jpg | GRAPHIC | 60669
24 | GRAPHIC | jun2025ip017.jpg | GRAPHIC | 88933
25 | GRAPHIC | jun2025ip018.jpg | GRAPHIC | 90858
26 | GRAPHIC | jun2025ip019.jpg | GRAPHIC | 111642
27 | GRAPHIC | jun2025ip020.jpg | GRAPHIC | 277650
28 | GRAPHIC | jun2025ip021.jpg | GRAPHIC | 112678
29 | GRAPHIC | jun2025ip022.jpg | GRAPHIC | 105950
| Complete submission text file | 0000860413-25-000114.txt |  | 4908927

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
4 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | fibk-20250729.xsd | EX-101.SCH | 1773
5 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | fibk-20250729_lab.xml | EX-101.LAB | 21885
6 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | fibk-20250729_pre.xml | EX-101.PRE | 12502
39 | EXTRACTED XBRL INSTANCE DOCUMENT | fibk-20250729_htm.xml | XML | 2723

Mailing Address 401 NO 31ST STREET BILLINGS MT 59101
Business Address 401 NO 31ST STREET BILLINGS MT 59101 4062555311
FIRST INTERSTATE BANCSYSTEM INC (Filer) CIK: 0000860413 (see all company filings)

EIN.: 810331430 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 8-K | Act: 34 | File No.: 001-34653 | Film No.: 251162165
SIC: 6022 State Commercial Banks
(CF Office: 02 Finance)