First Interstate Bancsystem Inc

Since the adoption of its $150 million stock repurchase program on August 28, 2025, the Company repurchased approximately 0.8 million shares of common stock through September 30, 2025 and an additional 1.0 million shares of common stock through October 28, 2025, for a total repurchase of approximately $57.2 million through October 28, 2025 or approximately 1.8 million shares.

SEC original ↗First Interstate Bancsystem Inc — Earnings release (8-K exhibit)EX-99Oct 29, 2025

DIVIDEND DECLARATION On October 28, 2025, the Company s board of directors declared a dividend of $0.47 per common share, payable on November 20, 2025, to common stockholders of record as of November 10, 2025.

SEC original ↗First Interstate Bancsystem Inc — Earnings release (8-K exhibit)EX-99Oct 29, 2025

The dividend equates to a 6.0% annualized yield based on the $31.11 per share average closing price of the Company s common stock as reported on NASDAQ during the third quarter of 2025.

SEC original ↗First Interstate Bancsystem Inc — Earnings release (8-K exhibit)EX-99Oct 29, 2025

Excluding interest accretion from the fair value of acquired loans, the adjusted net FTE interest margin ratio 1 , was 3.30%, an increase of 4 basis points from the prior quarter, primarily driven by lower interest expense resulting from decreased borrowings.

SEC original ↗First Interstate Bancsystem Inc — Earnings release (8-K exhibit)EX-99Oct 29, 2025

The increase compared to the second quarter of 2025 was primarily related to the write off of the issuance costs of the $100.0 million of aggregate principle amount of 5.25% fixed-to-floating rate subordinated notes due 2030 that were called for redemption in August 2025.

SEC original ↗First Interstate Bancsystem Inc — Earnings release (8-K exhibit)EX-99Oct 29, 2025

BALANCE SHEET Total assets decreased $233.5 million, or 0.8%, to $27,332.9 million as of September 30, 2025, from $27,566.4 million as of June 30, 2025 and decreased $2,262.6 million, or 7.6%, from $29,595.5 million as of September 30, 2024, primarily due to decreases in investment securities and loans, the funds from which were partially used to pay down debt, fund decreases in deposits, and securities sold under repurchase agreements.

SEC original ↗First Interstate Bancsystem Inc — Earnings release (8-K exhibit)EX-99Oct 29, 2025

We continue to execute on our strategic plan, announced earlier this year, to focus on organic growth and leverage our strong balance sheet to support our customers.

SEC original ↗First Interstate Bancsystem Inc — Earnings release (8-K exhibit)EX-99Oct 29, 2025

Our net interest margin continued to improve, and we maintained a clear focus on managing expenses prudently, with a goal to drive long-term, profitable growth, said James A Reuter, President and Chief Executive Officer of the Company.

SEC original ↗First Interstate Bancsystem Inc — Earnings release (8-K exhibit)EX-99Oct 29, 2025

Any statements about our plans, objectives, expectations, strategies, beliefs, or future performance or events constitute forward-looking statements.

SEC original ↗First Interstate Bancsystem Inc — Earnings release (8-K exhibit)EX-99Oct 29, 2025

is a financial and bank holding company focused on community banking.

SEC original ↗First Interstate Bancsystem Inc — Earnings release (8-K exhibit)EX-99Oct 29, 2025

Any statements about our plans, objectives, expectations, strategies, beliefs, or future performance, financial condition, results of operations, investment portfolio or market position, or events constitute forward-looking statements.

SEC original ↗First Interstate Bancsystem Inc — Presentation / slide deck (8-K exhibit)EX-99Oct 29, 2025

Cautionary Note Regarding Forward-Looking Statements and Factors that Could Affect Future Results This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Rule 175 promulgated thereunder, and Section 21E of the Securities Exchange Act of 1934, as amended, or the Exchange Act, and Rule 3b-6 promulgated thereunder, that involve inherent risks and uncertainties.

SEC original ↗First Interstate Bancsystem Inc — Earnings release (8-K exhibit)EX-99Oct 29, 2025

Forward-looking statements involve known and unknown risks, uncertainties, assumptions, estimates and other important factors that could cause actual results to differ materially from any results, performance or events expressed or implied by such forward-looking statements.

SEC original ↗First Interstate Bancsystem Inc — Earnings release (8-K exhibit)EX-99Oct 29, 2025

htm EX-99.2 sep2025ip Q3 2025 Investor Presentation Exhibit 99.2 October 29, 2025 CAUTIONARY NOTE REGARDING FORWARD-LOOKING STATEMENTS This presentation contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Rule 175 promulgated thereunder, and Section 21E of the Securities Exchange Act of 1934, as amended, and Rule 3b-6 promulgated thereunder, that involve inherent risks and uncertainties.

SEC original ↗First Interstate Bancsystem Inc — Presentation / slide deck (8-K exhibit)EX-99Oct 29, 2025

Forward- looking statements involve known and unknown risks, uncertainties, assumptions, estimates and other important factors that could cause actual results to differ materially from any results, performance or events expressed or implied by such forward-looking statements.

SEC original ↗First Interstate Bancsystem Inc — Presentation / slide deck (8-K exhibit)EX-99Oct 29, 2025