Form 8-K - Current report:
SEC Accession No. 0000860413-25-000155
Filing Date
2025-10-16
Accepted
2025-10-16 16:01:36
Documents
15
Period of Report
2025-10-16
Items
Item 7.01: Regulation FD Disclosure
Item 9.01: Financial Statements and Exhibits

Document Format Files

Seq Description Document Type Size
1 8-K fibk-20251016.htm   iXBRL 8-K 38002
2 EX-99.1 fibk-20251016x8kprxnebraska.htm EX-99.1 27473
6 GRAPHIC image.jpg GRAPHIC 17609
7 GRAPHIC image_1.jpg GRAPHIC 25135
  Complete submission text file 0000860413-25-000155.txt   250062

Data Files

Seq Description Document Type Size
3 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT fibk-20251016.xsd EX-101.SCH 1773
4 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT fibk-20251016_lab.xml EX-101.LAB 21885
5 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT fibk-20251016_pre.xml EX-101.PRE 12502
17 EXTRACTED XBRL INSTANCE DOCUMENT fibk-20251016_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.: 251397633
SIC: 6022 State Commercial Banks
(CF Office: 02 Finance)