<SEC-DOCUMENT>0001967940-25-000047-index.html : 20250714
<SEC-HEADER>0001967940-25-000047.hdr.sgml : 20250714
<ACCEPTANCE-DATETIME>20250714164115
ACCESSION NUMBER:		0001967940-25-000047
CONFORMED SUBMISSION TYPE:	144
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20250714
DATE AS OF CHANGE:		20250714

SUBJECT COMPANY:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIRST INTERSTATE BANCSYSTEM INC
		CENTRAL INDEX KEY:			0000860413
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		ORGANIZATION NAME:           	02 Finance
		EIN:				810331430
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	001-34653
		FILM NUMBER:		251122150

	BUSINESS ADDRESS:	
		STREET 1:		401 NO 31ST STREET
		CITY:			BILLINGS
		STATE:			MT
		ZIP:			59101
		BUSINESS PHONE:		4062555311

	MAIL ADDRESS:	
		STREET 1:		401 NO 31ST STREET
		CITY:			BILLINGS
		STATE:			MT
		ZIP:			59101

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIRST INTERSTATE BANCSYSTEM OF MONTANA INC
		DATE OF NAME CHANGE:	19930615

REPORTING-OWNER:	

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees
		CENTRAL INDEX KEY:			0001908880
		ORGANIZATION NAME:           	
		EIN:				000000000
		STATE OF INCORPORATION:			MT
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		144

	BUSINESS ADDRESS:	
		STREET 1:		PO 30918
		CITY:			BILLINGS
		STATE:			MT
		ZIP:			59116
		BUSINESS PHONE:		406-255-5239

	MAIL ADDRESS:	
		STREET 1:		PO 30918
		CITY:			BILLINGS
		STATE:			MT
		ZIP:			59116
</SEC-HEADER>
<DOCUMENT>
<TYPE>144
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
Document 1 - file: primary_doc.html

Document 1 - RAW XML: primary_doc.xml

</DOCUMENT>
</SEC-DOCUMENT>