KBRA Releases Surveillance Report for First Interstate BancSystem, Inc.

On January 30, 2026, KBRA affirmed the senior unsecured debt rating of BBB+, the subordinated debt rating of BBB, and the short-term debt rating of K2 for Billings, Montana-based First Interstate BancSystem, Inc. (NASDAQ: FIBK). In addition, KBRA affirmed the deposit and senior unsecured debt ratings of A-, the subordinated debt rating of BBB+, and the short-term deposit and debt ratings of K2 for its subsidiary, First Interstate Bank. The Outlook for all long-term ratings is Stable.

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