First Interstate BancSystem(FIBK) - 2024 Q3 - Quarterly Results

Exhibit 99.1 For Immediate Release First Interstate BancSystem, Inc. Reports Third Quarter Earnings Billings, MT - October 24, 2024 - First Interstate BancSystem, Inc. (NASDAQ: FIBK) (the "Company") today reported financial results for the third quarter of 2024. For the quarter, the Company reported net income of $55.5 million, or$0.54 per share, which compares to net income of $60.0 million, or$0.58 per share, for the second quarter of 2024 and net income of $72.7 million, or$0.70 per share, for the thi ...