Form 4 - Statement of changes in beneficial ownership of securities:
SEC Accession No. 0001493152-25-016804
Filing Date
2025-10-03
Accepted
2025-10-03 13:25:12
Documents
1
Period of Report
2025-09-09

Document Format Files

Seq Description Document Type Size
1 ownership.html 4  
1 ownership.xml 4 9219
  Complete submission text file 0001493152-25-016804.txt   10926
Mailing Address 401 NO 31ST STREET BILLINGS MT 59101
Business Address 401 NO 31ST STREET BILLINGS MT 59101 4062555311
FIRST INTERSTATE BANCSYSTEM INC (Issuer) CIK: 0000860413 (see all company filings)

EIN.: 810331430 | State of Incorp.: DE | Fiscal Year End: 1231
SIC: 6022 State Commercial Banks
(CF Office: 02 Finance)

Mailing Address PO 30918 BILLINGS MT 59116
Business Address PO 30918 BILLINGS MT 59116 406-255-5239
Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees (Reporting) CIK: 0001908880 (see all company filings)

State of Incorp.: MT | Fiscal Year End: 1231
Type: 4 | Act: 34 | File No.: 001-34653 | Film No.: 251373099