First Interstate Bancsystem Inc

Symbol: FIBK on Nasdaq
Entity: Company
Industry: State Commercial Banks (Office Of Finance)
Business address: 401 No 31 St Street, 59101 Billings, MT
Phone: 4062555311
State of incorporation: DE
Fiscal year end: December 31
Category: Large accelerated filer
Former names: FIRST INTERSTATE BANCSYSTEM OF MONTANA INC (to 3/9/1999)
Signature 13F: CHAD L. HOOKER - SENIOR VICE PRESIDENT
All SEC filings: View on sec.gov

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First Interstate Bancsystem Inc has filed 2,859 SEC EDGAR filings since 6/14/1996

Latest Filings

Form type	Document	Filing	Description	Filing date	Reporting date	File number(s)
8-K	Open Document \| Data	Open Filing	8-K	Sep 9, 2025	Sep 3, 2025	001-34653
4	Open Document	Open Filing	FORM 4	Sep 9, 2025	Sep 5, 2025
4	Open Document	Open Filing		Sep 5, 2025	Aug 5, 2025
3	Open Document	Open Filing	FORM 3	Sep 5, 2025	Aug 29, 2025
144	Open Document	Open Filing		Sep 2, 2025		001-34653
4	Open Document	Open Filing		Sep 2, 2025	Sep 2, 2025
8-K	Open Document \| Data	Open Filing	8-K	Sep 2, 2025	Aug 29, 2025	001-34653
8-K/A	Open Document \| Data	Open Filing	8-K/A	Aug 29, 2025	Aug 13, 2025	001-34653
4	Open Document	Open Filing	FORM 4	Aug 29, 2025	Aug 27, 2025
8-K	Open Document \| Data	Open Filing	8-K	Aug 28, 2025	Aug 28, 2025	001-34653
3	Open Document	Open Filing	FORM 3	Aug 21, 2025	Aug 13, 2025
4	Open Document	Open Filing	FORM 4	Aug 18, 2025	Aug 14, 2025
8-K	Open Document \| Data	Open Filing	8-K	Aug 18, 2025	Aug 15, 2025	001-34653
8-K	Open Document \| Data	Open Filing	8-K	Aug 15, 2025	Aug 13, 2025	001-34653
144	Open Document	Open Filing		Aug 14, 2025		001-34653
10-Q	Open Document \| Data	Open Filing	10-Q	Aug 6, 2025	Jun 30, 2025	001-34653
SCHEDULE 13G/A	Open Document	Open Filing		Aug 6, 2025		005-78756
4	Open Document	Open Filing		Aug 1, 2025	Aug 1, 2025
8-K	Open Document \| Data	Open Filing	8-K	Jul 29, 2025	Jul 29, 2025	001-34653
5	Open Document	Open Filing		Jul 18, 2025	Dec 31, 2024
4	Open Document	Open Filing		Jul 15, 2025	Jul 14, 2025
SCHEDULE 13G	Open Document	Open Filing		Jul 15, 2025		005-78756
144	Open Document	Open Filing		Jul 14, 2025		001-34653
8-K	Open Document \| Data	Open Filing	FORM 8-K	Jul 3, 2025	Jul 3, 2025	001-34653
8-K	Open Document \| Data	Open Filing	FORM 8-K	Jun 10, 2025	Jun 10, 2025	001-34653
424B5	Open Document \| Data	Open Filing	424B5	Jun 6, 2025		333-272215
8-K	Open Document \| Data	Open Filing	FORM 8-K	Jun 6, 2025	Jun 5, 2025	001-34653
3/A	Open Document	Open Filing	FORM 3/A	Jun 5, 2025	Jun 1, 2025
FWP	Open Document	Open Filing	FWP	Jun 5, 2025		333-272215
305B2	Open Document	Open Filing	305B2	Jun 5, 2025		333-272215
FWP	Open Document	Open Filing	FWP	Jun 5, 2025		333-272215
424B5	Open Document	Open Filing	424B5	Jun 5, 2025		333-272215
3	Open Document	Open Filing	FORM 3	Jun 4, 2025	Jun 1, 2025
4	Open Document	Open Filing	FORM 4	Jun 3, 2025	Jun 1, 2025
4	Open Document	Open Filing	FORM 4	Jun 3, 2025	Jun 1, 2025
4	Open Document	Open Filing	FORM 4	Jun 3, 2025	Jun 1, 2025
4	Open Document	Open Filing	FORM 4	Jun 3, 2025	Jun 1, 2025
4	Open Document	Open Filing	FORM 4	Jun 3, 2025	Jun 1, 2025
4	Open Document	Open Filing	FORM 4	Jun 3, 2025	Jun 1, 2025
4	Open Document	Open Filing	FORM 4	Jun 3, 2025	Jun 1, 2025
4	Open Document	Open Filing	FORM 4	Jun 3, 2025	Jun 1, 2025
4	Open Document	Open Filing	FORM 4	Jun 3, 2025	Jun 1, 2025
4	Open Document	Open Filing	FORM 4	Jun 3, 2025	Jun 1, 2025
4	Open Document	Open Filing	FORM 4	Jun 3, 2025	Jun 1, 2025
8-K	Open Document \| Data	Open Filing	8-K	Jun 2, 2025	Jun 2, 2025	001-34653
8-K	Open Document \| Data	Open Filing	8-K	Jun 2, 2025	Jun 1, 2025	001-34653
4	Open Document	Open Filing	FORM 4	May 30, 2025	May 24, 2023
4	Open Document	Open Filing	FORM 4	May 29, 2025	May 28, 2025
8-K	Open Document \| Data	Open Filing	8-K	May 23, 2025	May 20, 2025	001-34653
DEFA14A	Open Document	Open Filing	DEFA14A	May 16, 2025		001-34653

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