First Interstate BancSystem: 3 Key Takeaways for Long-Term Investors

First Interstate BancSystem reported Q3 2026 net income of $62.2 million with net interest margin expanding for the 10th consecutive quarter as maturing loans reset at higher rates. The bank is strategically shedding high-cost deposits, repurchased 2 million shares during Q3, and expects continued net interest income expansion into Q4 2026 driven by asset repricing and deposit stability.