SEC EDGAR Submission 0000860413-20-000099

<SEC-DOCUMENT>0000860413-20-000099-index.html : 20200320
<SEC-HEADER>0000860413-20-000099.hdr.sgml : 20200320
<ACCEPTANCE-DATETIME>20200320141029
ACCESSION NUMBER:		0000860413-20-000099
CONFORMED SUBMISSION TYPE:	DEF 14A
PUBLIC DOCUMENT COUNT:		37
CONFORMED PERIOD OF REPORT:	20200505
FILED AS OF DATE:		20200320
DATE AS OF CHANGE:		20200320
EFFECTIVENESS DATE:		20200320

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			FIRST INTERSTATE BANCSYSTEM INC
		CENTRAL INDEX KEY:			0000860413
		STANDARD INDUSTRIAL CLASSIFICATION:	STATE COMMERCIAL BANKS [6022]
		IRS NUMBER:				810331430
		STATE OF INCORPORATION:			MT
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		DEF 14A
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-34653
		FILM NUMBER:		20731466

	BUSINESS ADDRESS:	
		STREET 1:		P O BOX 30918
		STREET 2:		401 NO 31ST STREET
		CITY:			BILLINGS
		STATE:			MT
		ZIP:			59116-0918
		BUSINESS PHONE:		4062555300

	MAIL ADDRESS:	
		STREET 1:		P O BOX 30918
		STREET 2:		401 NO 31ST STREET
		CITY:			BILLINGS
		STATE:			MT
		ZIP:			59116-0918

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	FIRST INTERSTATE BANCSYSTEM OF MONTANA INC
		DATE OF NAME CHANGE:	19930615
</SEC-HEADER>
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<TYPE>DEF 14A
<SEQUENCE>1
<FILENAME>a2019proxy-def14a.htm
<DESCRIPTION>DEF 14A
<TEXT>
Document 1 - file: a2019proxy-def14a.htm

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Document 2 - file: chart-517b179b7ac0436a96c1.jpg

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Document 3 - file: chart-5a0fc157c603469899f1.jpg

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Document 4 - file: chart-72efe6e580ed48339381.jpg

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Document 5 - file: chart-7701c8c9af0b4bd4b171.jpg

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Document 6 - file: chart-ed3988ad051843dbabb1.jpg

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<FILENAME>chart-fbd5c3366e7747d58351.jpg
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Document 7 - file: chart-fbd5c3366e7747d58351.jpg

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Document 8 - file: fibk-proxy_02xcoverxpage1.jpg

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<SEQUENCE>9
<FILENAME>fibk-proxy_03xinforgraphic.jpg
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<TEXT>
Document 9 - file: fibk-proxy_03xinforgraphic.jpg

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<FILENAME>fibk-proxy_05xagendaxandxv.jpg
<TEXT>
Document 10 - file: fibk-proxy_05xagendaxandxv.jpg

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<FILENAME>fibk-proxy_07x2019xperform.jpg
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<TEXT>
Document 11 - file: fibk-proxy_07x2019xperform.jpg

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<FILENAME>fibk-proxy_09xaxvotexforxp.jpg
<TEXT>
Document 12 - file: fibk-proxy_09xaxvotexforxp.jpg

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<SEQUENCE>13
<FILENAME>fibk-proxy_10xaxvotexforxp.jpg
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<TEXT>
Document 13 - file: fibk-proxy_10xaxvotexforxp.jpg

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<SEQUENCE>14
<FILENAME>fibk-proxy_14xheaderxjames.jpg
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Document 14 - file: fibk-proxy_14xheaderxjames.jpg

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Document 15 - file: fibk-proxy_15xheaderxdavid.jpg

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<SEQUENCE>16
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<TEXT>
Document 16 - file: fibk-proxy_16xheaderxkevin.jpg

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<SEQUENCE>17
<FILENAME>fibk-proxy_17xheaderxalice.jpg
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<TEXT>
Document 17 - file: fibk-proxy_17xheaderxalice.jpg

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<SEQUENCE>18
<FILENAME>fibk-proxy_18xheaderxdanax.jpg
<TEXT>
Document 18 - file: fibk-proxy_18xheaderxdanax.jpg

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<SEQUENCE>19
<FILENAME>fibk-proxy_19xheaderxphili.jpg
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<TEXT>
Document 19 - file: fibk-proxy_19xheaderxphili.jpg

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<SEQUENCE>20
<FILENAME>fibk-proxy_20xheaderxjohnx.jpg
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Document 20 - file: fibk-proxy_20xheaderxjohnx.jpg

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<SEQUENCE>21
<FILENAME>fibk-proxy_21xheaderxjodix.jpg
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<TEXT>
Document 21 - file: fibk-proxy_21xheaderxjodix.jpg

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<FILENAME>fibk-proxy_22xheaderxkirkx.jpg
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Document 22 - file: fibk-proxy_22xheaderxkirkx.jpg

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<SEQUENCE>23
<FILENAME>fibk-proxy_23xheaderxdenni.jpg
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Document 23 - file: fibk-proxy_23xheaderxdenni.jpg

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<SEQUENCE>24
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<TEXT>
Document 24 - file: fibk-proxy_24xheaderxrossx.jpg

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<SEQUENCE>25
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Document 25 - file: fibk-proxy_25xheaderxrusse.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>26
<FILENAME>fibk-proxy_26xheaderxpatri.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 26 - file: fibk-proxy_26xheaderxpatri.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>27
<FILENAME>fibk-proxy_27xheaderxmarcy.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 27 - file: fibk-proxy_27xheaderxmarcy.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>28
<FILENAME>fibk-proxy_28xheaderxrenee.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 28 - file: fibk-proxy_28xheaderxrenee.jpg

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<SEQUENCE>29
<FILENAME>fibk-proxy_29xheaderxkadex.jpg
<TEXT>
Document 29 - file: fibk-proxy_29xheaderxkadex.jpg

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<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>30
<FILENAME>fibk-proxy_30xheaderxjames.jpg
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<TEXT>
Document 30 - file: fibk-proxy_30xheaderxjames.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>31
<FILENAME>fibk-proxy_31xheaderxjonat.jpg
<TEXT>
Document 31 - file: fibk-proxy_31xheaderxjonat.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>32
<FILENAME>fibk-proxy_32xwhatxwexpayx.jpg
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<TEXT>
Document 32 - file: fibk-proxy_32xwhatxwexpayx.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>33
<FILENAME>fibk-proxy_33xhowxdoxixvot.jpg
<TEXT>
Document 33 - file: fibk-proxy_33xhowxdoxixvot.jpg

</DOCUMENT>
<DOCUMENT>
<TYPE>GRAPHIC
<SEQUENCE>34
<FILENAME>fibk-proxy_34xcommitteexta.jpg
<DESCRIPTION>GRAPHIC
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Document 34 - file: fibk-proxy_34xcommitteexta.jpg

</DOCUMENT>
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<SEQUENCE>35
<FILENAME>fibk-proxy_35xbsxstixltixt.jpg
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Document 35 - file: fibk-proxy_35xbsxstixltixt.jpg

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<DOCUMENT>
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<SEQUENCE>36
<FILENAME>image71.jpg
<TEXT>
Document 36 - file: image71.jpg

</DOCUMENT>
<DOCUMENT>
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<SEQUENCE>37
<FILENAME>kirkjensensignaturea011.jpg
<DESCRIPTION>GRAPHIC
<TEXT>
Document 37 - file: kirkjensensignaturea011.jpg

</DOCUMENT>
</SEC-DOCUMENT>