Form 8-K - Current report:
SEC Accession No. 0000860413-26-000041
Filing Date
2026-05-13
Accepted
2026-05-13 17:12:56
Documents
12
Period of Report
2026-05-11
Items
Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
Item 9.01: Financial Statements and Exhibits

Document Format Files

Seq Description Document Type Size
1 8-K fibk-20260511.htm   iXBRL 8-K 33858
2 EX-10.1 fibk-20260511xex101xtransi.htm EX-10.1 81573
  Complete submission text file 0000860413-26-000041.txt   249679

Data Files

Seq Description Document Type Size
3 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT fibk-20260511.xsd EX-101.SCH 1773
4 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT fibk-20260511_lab.xml EX-101.LAB 21885
5 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT fibk-20260511_pre.xml EX-101.PRE 12502
15 EXTRACTED XBRL INSTANCE DOCUMENT fibk-20260511_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.: 26974559
SIC: 6022 State Commercial Banks
(CF Office: 02 Finance)