FIRST INTERSTATE BANCSYSTEM INC — Director's Dealing 2023

Jun 5, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: FIRST INTERSTATE BANCSYSTEM INC (FIBK)
CIK: 0000860413
Period of Report: 2023-06-01

Reporting Person: HEYNEMAN JOHN M JR (Director, 10% Owner)
Reporting Person: John M Heyneman Jr. Trust (10% Owner)
Reporting Person: Rae Ann Morss & John Heyneman Jr., Trustees FBO Rae Ann Morss Exemption Trust Under the Scott Family 1996 Trust (10% Owner)
Reporting Person: Riki Rae Scott Davidson & John Heyneman Jr., Trustees FBO Riki Scott Davidson Exemption Trust Under the Scott Family 1996 Trust (10% Owner)
Reporting Person: Towanda Investments Limited Partnership (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-06-01	Class A Common Stock	A	3401	—	Acquired	24531	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Class A Common Stock	1402432	Indirect

Footnotes

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, 2024, subject to the reporting persons provision of continuous service to the Registrant through the vesting date.

F2: The reporting person no longer has a reportable beneficial interest in 890 shares of FIBK common stock owned by his son and included in the reporting person's prior ownership reports.

F3: As a result of certain agreements entered into by and among the reporting persons, the Issuer, and certain other stockholders of the Issuer, the reporting persons may be deemed members of a group with the other signatories thereto and may be deemed to share beneficial ownership of the securities reported herein. Each of the reporting persons disclaims beneficial ownership of any such securities, except to the extent of its pecuniary interest therein. The reporting persons expect to file future Forms 4 and 5, if any, together with John Heyneman, Jr. with the indication of direct or indirect ownership in Table I being made from John Heyneman, Jr.'s perspective. The nature of beneficial ownership is described in detail by footnote for all reporting persons.

F4: Composed of 139,921 shares held of record by John M Heyneman Jr. Trust, 85,836 shares held of record by Riki Rae Scott Davidson & John Heyneman Jr., Trustees FBO Riki Scott Davidson Exemption Trust Under the Scott Family 1996 Trust, 85,836 shares held of record by Rae Ann Morss & John Heyneman Jr., Trustees FBO Rae Ann Morss Exemption Trust Under the Scott Family 1996 Trust, 1,085,792 shares held of record by Towanda Investments Limited Partnership, 3,977 shares held of record by John Heyneman, Jr.'s spouse, 890 shares held of record by John Heyneman, Jr.'s son, and 1070 shares held of record by John Heyneman, Jr.'s daughter.