FIRST INTERSTATE BANCSYSTEM INC Human Resources Contracts & Agreements

Form of Performance Restricted Stock Unit Grant Agreement (Filed With SEC on May 25, 2023)

Company Director Compensation Summary (Filed With SEC on February 24, 2023)

Executive Change In Control Separation Agreement, dated May 30, 2022, between the Company and Gary Lorenz (Filed With SEC on August 5, 2022)

Executive Change In Control Separation Agreement, dated May 30, 2022, between the Company and Kristina Robbins (Filed With SEC on August 5, 2022)

Executive Employment Agreement, dated December 14, 2021, between the Company and Russell A. Lee (Filed With SEC on February 25, 2022)

Executive Employment Agreement, dated February 1, 2022, between the Company and Scott E. Erkonen (Filed With SEC on February 25, 2022)

Executive Employment Agreement, dated December 14, 2021, between the Company and Philip G. Gaglia (Filed With SEC on February 25, 2022)

Executive Employment Agreement, dated December 14, 2021, between the Company and Jodi Delahunt Hubbell (Filed With SEC on February 25, 2022)

Executive Employment Agreement, dated December 14, 2021, between the Company and Kirk D. Jensen (Filed With SEC on February 25, 2022)

Executive Employment Agreement, dated December 14, 2021, between the Company and Marcy D. Mutch (Filed With SEC on February 25, 2022)

Company Director Compensation Summary (Filed With SEC on February 25, 2022)

Executive Employment Agreement, dated February 1, 2022, between the Company and Karlyn M. Knieriem (Filed With SEC on February 25, 2022)

Employment Agreement between the Company, First Interstate Bank, and Kade Peterson dated August 19, 2021 (Filed With SEC on November 4, 2021)

Employment Agreement between the Company, First Interstate Bank, and Kirk Jensen dated August 19, 2021 (Filed With SEC on November 4, 2021)

Employment Agreement between the Company, First Interstate Bank, and Phil Gaglia dated August 19, 2021 (Filed With SEC on November 4, 2021)

Amendment 2021-1 to the First Interstate BancSystem, Inc. Deferred Compensation Plan (Filed With SEC on November 4, 2021)

Employment Agreement by and between Kevin P. Riley, First Interstate BancSystem, Inc. and First Interstate Bank, effective August 19, 2021 (Filed With SEC on August 20, 2021)

Employment Agreement by and between Marcy D. Mutch, First Interstate BancSystem, Inc. and First Interstate Bank, effective August 19, 2021 (Filed With SEC on August 20, 2021)

Employment Agreement by and between Jodi Delahunt Hubbell, First Interstate BancSystem, Inc. and First Interstate Bank, effective August 19, 2021 (Filed With SEC on August 20, 2021)

Employment Agreement by and between Russell A. Lee, First Interstate BancSystem, Inc. and First Interstate Bank, effective August 19, 2021 (Filed With SEC on August 20, 2021)

First Interstate BancSystem, Inc. 2015 Equity and Incentive Plan Performance Time Vested Restricted Stock Grant Agreement (Filed With SEC on May 7, 2021)

First Amendment to the First Interstate BancSystem, Inc. Deferred Compensation Plan (Filed With SEC on May 7, 2021)

First Interstate BancSystem, Inc. 2015 Equity and Incentive Plan Performance Restricted Stock Grant Agreement (Filed With SEC on May 7, 2021)

First Interstate BancSystem, Inc. Director Compensation Summary (Filed With SEC on March 1, 2021)

First Interstate BancSystem, Inc. 2015 Equity and Incentive Plan Performance Restricted Stock Grant Agreement (Filed With SEC on February 27, 2020)

First Interstate BancSystem, Inc. Director Compensation (Filed With SEC on February 27, 2020)

First Interstate BancSystem, Inc. 2015 Equity and Incentive Plan Performance Restricted Stock Grant Agreement (Filed With SEC on February 27, 2019)

Executive Employment Agreement between First Interstate BancSystem, Inc. and Jodi Delahunt Hubbell dated April 3, 2018 (Filed With SEC on February 27, 2019)

First Interstate BancSystem, Inc. 2015 Equity and Incentive Plan , amended and restated as of January 1, 2019 (Filed With SEC on February 27, 2019)

First Interstate BancSystem, Inc. 2015 Equity and Incentive Plan Performance Time Vested Restricted Stock Grant Agreement (Filed With SEC on February 27, 2019)

First Interstate BancSystem, Inc. Director Compensation (Filed With SEC on February 27, 2019)

Executive Employment Agreement between First Interstate BancSystem, Inc. and Philip G. Gaglia dated April 3, 2018 (Filed With SEC on February 27, 2019)

Executive Employment Agreement between First Interstate BancSystem, Inc. and Renee L. Newman dated April 3, 2018 (Filed With SEC on February 27, 2019)

Employment Agreement by and between Marcy D. Mutch, First Interstate BancSystem, Inc. and First Interstate Bank, effective April 3, 2018 (Filed With SEC on April 5, 2018)

Employment Agreement by and between Kevin P. Riley, First Interstate BancSystem, Inc. and First Interstate Bank, effective April 3, 2018 (Filed With SEC on April 5, 2018)

Executive Employment Agreement (Filed With SEC on May 6, 2016)

FIRST INTERSTATE BANCSYSTEM, INC. 2015 EQUITY AND INCENTIVE PLAN RESTRICTED STOCK GRANT AGREEMENT (EMPLOYEES) (Filed With SEC on March 1, 2016)

First Interstate BancSystem, Inc. 2015 Equity and Incentive Plan Restricted Stock Grant Agreement (Employees - 2016) (Filed With SEC on March 1, 2016)

Executive Employment Agreement (Filed With SEC on November 9, 2015)

Fourth Amendment to the First Interstate BancSystem, Inc. 2006 Equity Compensation Plan (Filed With SEC on July 31, 2013)