Karlyn M. Knieriem - Mar 15, 2024 Form 4/A Insider Report for FIRST INTERSTATE BANCSYSTEM INC (FIBK)

Role: EVP, Chief Risk Officer
Signature: /s/ Kirk D. Jensen, as attorney in fact for reporting person
Stock symbol: FIBK
Transactions as of: Mar 15, 2024
Transactions value $: -$13,109
Form type: 4/A
Date filed: 3/26/2024, 06:22 PM
Date Of Original Report: Mar 19, 2024
Previous filing: Mar 8, 2024

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	FIBK	Common Stock	Tax liability	-$5.45K	-216	-1.05%	$25.21	20.4K	Mar 15, 2024	Direct	F1
transaction	FIBK	Common Stock	Tax liability	-$7.66K	-304	-1.49%	$25.21	20.1K	Mar 15, 2024	Direct	F1
transaction	FIBK	Common Stock	Award	$0	+5.09K	+25.36%	$0.00	25.2K	Mar 15, 2024	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Disposition to the issuer of issuer securities in payment of minimum required withholding taxes due upon vesting of unvested shares.
F2	Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2024 Equity and Incentive Plan. The restricted stock units vest in three equal annual installments beginning on March 15, 2025, subject to the reporting person's continued employment through each applicable vesting date.

Remarks:

Amendment being filed solely to reflect shares disposed of to the issuer of issuer's securities in payment of minimum withholding taxes due upon vesting of unvested shares and to update the corresponding end of period holdings reported.