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FIRST INTERSTATE BANCSYSTEM INC

For the period ended Dec 31, 2025. Filed Feb 26, 2026.

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About this filing

A company's yearly report to the SEC, with audited financial statements. It is the fullest account a company gives of its business, its finances and the risks it sees.

FY2025 · Filed Feb 26, 2026

FIBK$38.00-1.1%Stored close · as of Nov 10, 2026

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Contents

Item 14. Principal Accountant Fees and Services

Information concerning principal accountant fees and services and related information is set forth under the headings “Principal Accounting Fees and Services” and “Audit Committee Pre-Approval Policies and Procedures” in our Proxy Statement relating to our 2026 annual meeting of shareholders and is incorporated herein by reference.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.