FIRST INTERSTATE BANCSYSTEM INC
For the period ended Sep 30, 2026. Filed Nov 2, 2026.
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A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.
Sep 30, 2026 · Filed Nov 2, 2026
FIBK$38.42+1.6%Stored close · as of Nov 9, 2026
Extracted filing text, with the paragraph anchors used by the comparison.
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Item 6. Exhibits
| Exhibit Number | Description | |
| 3.1 | Certificate of Incorporation of First Interstate BancSystem, Inc. (incorporated herein by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K, File No. 001-34653, filed on May 25, 2023). | |
| 3.2 | Certificate of Amendment to the Certificate of Incorporation of First Interstate BancSystem, Inc. (incorporated herein by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K, File No. 001-34653, filed on May 29, 2026). | |
| 3.3 | Amended and Restated Bylaws of First Interstate BancSystem, Inc. (incorporated herein by reference to Exhibit 3.1 to the Company’s Current Report on Form 8-K, File No. 001-34653, filed on May 23, 2025). | |
| 10.1 | Transition and Separation Agreement by and between First Interstate BancSystem, Inc. and Kirk Jensen, dated July 9, 2026. | |
| 10.2 | Employment Agreement, dated September 14, 2026, between Jeffery Lee, the Company and the Bank (incorporated herein by reference to Exhibit 10.1 to the Company’s Current report on Form 8-K, File No. 001-34653, filed on September 16, 2026) | |
| 10.3 | Amendment, dated June 8, 2026, to Lease Agreement between Billings 401 Joint Venture and First Interstate Bank Montana dated September 20, 1985. | |
| 31.1 | Certification by Chief Executive Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) under the Securities Exchange Act of 1934, as amended. | |
| 31.2 | Certification by Chief Financial Officer pursuant to Rule 13a-14(a) and Rule 15d-14(a) under the Securities Exchange Act of 1934, as amended. | |
| 32** | 18 U.S.C. Section 1350 Certifications. | |
| 101.INS | Interactive Data File - The instance document does not appear in the interactive data file because its XBRL tags are embedded within the inline XBRL document. | |
| 101.SCH | Inline XBRL Taxonomy Extension Schema Document | |
| 101.CAL | Inline XBRL Taxonomy Extension Calculation Linkbase Document | |
| 101.DEF | Inline XBRL Taxonomy Extension Definition Linkbase Document | |
| 101.LAB | Inline XBRL Taxonomy Extension Label Linkbase Document | |
| 101.PRE | Inline XBRL Taxonomy Extension Presentation Linkbase Document | |
| 104 | Cover Page Interactive Data File - The cover page XBRL tags are embedded within the inline XBRL document (included in Exhibit 101) | |
| ** | Furnished herewith. |
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