Form 424B5 - Prospectus [Rule 424(b)(5)]:
SEC Accession No. 0001104659-25-057408
Filing Date
2025-06-06
Accepted
2025-06-06 17:12:17
Documents
15

Document Format Files

Seq Description Document Type Size
1 424B5 tm258437-5_424b5.htm 424B5 670587
2 EX-FILING FEES tm258437d5_ex-filingfees.htm   iXBRL EX-FILING FEES 18432
3 GRAPHIC lg_firstinterstatebanc-4clr.jpg GRAPHIC 14983
4 GRAPHIC lg_firstinterstatenew-4c.jpg GRAPHIC 42520
5 GRAPHIC lg_kbwcompany-4clr.jpg GRAPHIC 15857
  Complete submission text file 0001104659-25-057408.txt   910347

Data Files

Seq Description Document Type Size
18 EXTRACTED XBRL INSTANCE DOCUMENT tm258437d5_ex-filingfees_htm.xml XML 4257
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: 424B5 | Act: 33 | File No.: 333-272215 | Film No.: 251032009
SIC: 6022 State Commercial Banks
(CF Office: 02 Finance)