Form 144 - Report of proposed sale of securities:
SEC Accession No. 0001967940-25-000047
Filing Date
2025-07-14
Accepted
2025-07-14 16:41:15
Documents
1

Document Format Files

Seq Description Document Type Size
1 primary_doc.html 144  
1 primary_doc.xml 144 3055
  Complete submission text file 0001967940-25-000047.txt   4798
Mailing Address 401 NO 31ST STREET BILLINGS MT 59101
Business Address 401 NO 31ST STREET BILLINGS MT 59101 4062555311
FIRST INTERSTATE BANCSYSTEM INC (Subject) CIK: 0000860413 (see all company filings)

EIN.: 810331430 | State of Incorp.: DE | Fiscal Year End: 1231
Type: 144 | Act: 33 | File No.: 001-34653 | Film No.: 251122150
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)

EIN.: 000000000 | State of Incorp.: MT | Fiscal Year End: 1231
Type: 144