FIBK director granted 2,247 restricted stock units

Phillips Joyce Ann reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Phillips Joyce Ann reported acquisition or exercise transactions in this Form 4 filing.

FIRST INTERSTATE BANCSYSTEM INC director Joyce Ann Phillips received an equity award tied to future service. She was granted 2,247 shares of Common Stock in the form of restricted stock units under the company’s 2023 Equity and Incentive Plan. These units will vest on June 1, 2027, if she continues serving the company through that date or until the next annual shareholder meeting, whichever comes first. After this grant, her reported direct holdings total 14,599 shares.

Insider Trade Summary

Grant/Award: 2,247 shares

Grant/Award 1 txn

Insider Phillips Joyce Ann

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	2,247	$0.00	$0.00

Holdings After Transaction: Common Stock — 14,599 shares (Direct)

Footnotes (1)

1. F1. Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service to the Registrant through the earlier of the applicable vesting date or the date of the Registrant's next annual shareholder meeting.

Key Figures

RSU grant size: 2,247 shares Grant price per share: $0.00 per share Post-transaction holdings: 14,599 shares +1 more

4 metrics

RSU grant size 2,247 shares Restricted stock units granted on June 1, 2026

Grant price per share $0.00 per share Reported price for RSU grant

Post-transaction holdings 14,599 shares Total direct holdings after grant

RSU vesting date June 1, 2027 Scheduled vesting, subject to continuous service

Key Terms

restricted stock units, 2023 Equity and Incentive Plan, vesting

3 terms

restricted stock units financial

"Shares issuable upon vesting of restricted stock units granted to the reporting person"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

2023 Equity and Incentive Plan financial

"granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan"

vesting financial

"The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did FIBK director Joyce Ann Phillips report in this Form 4?

Joyce Ann Phillips reported receiving 2,247 restricted stock units of FIRST INTERSTATE BANCSYSTEM INC Common Stock. The award is a compensation grant, not a market purchase, and increases her reported direct holdings to 14,599 shares following the transaction.

How many FIBK shares were granted to Joyce Ann Phillips and at what price?

She was granted 2,247 shares of Common Stock through restricted stock units at a reported price of $0.00 per share. This reflects a compensatory equity award rather than an open-market transaction, consistent with stock-based director compensation.

When do Joyce Ann Phillips’ FIBK restricted stock units vest?

The 2,247 restricted stock units vest on June 1, 2027, subject to continuous service. Vesting can also occur earlier on the date of FIRST INTERSTATE BANCSYSTEM INC’s next annual shareholder meeting, provided she remains in service through that date.

What plan governs the restricted stock unit grant reported by FIBK’s director?

The restricted stock unit grant was made under FIRST INTERSTATE BANCSYSTEM INC’s 2023 Equity and Incentive Plan. This plan authorizes equity-based compensation awards, such as restricted stock units, to directors and other participants as part of their overall remuneration.

How many FIBK shares does Joyce Ann Phillips hold after this transaction?

Following the grant, Joyce Ann Phillips is reported to directly own 14,599 shares of FIRST INTERSTATE BANCSYSTEM INC Common Stock. This total includes the new restricted stock unit award as reflected in the Form 4 filing’s post-transaction share balance.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/03/2026 - 01:49 PM EDT Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Phillips Joyce Ann

(Last) (First) (Middle)

P.O. BOX 30918

(Street)

BILLINGS MONTANA 59116-0918

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
FIRST INTERSTATE BANCSYSTEM INC [ FIBK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	06/01/2026		A		2,247(1)	A	$0	14,599	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Shares issuable upon vesting of restricted stock units granted to the reporting person pursuant to the Registrant's 2023 Equity and Incentive Plan. The restricted stock units vest on June 1, 2027, subject to the reporting person's provision of continuous service to the Registrant through the earlier of the applicable vesting date or the date of the Registrant's next annual shareholder meeting.

Remarks:

	/s/ Kirk D. Jensen, Attorney-in-Fact for Reporting Person	06/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)