FIBKFirst Interstate BancSystem, Inc.

1. Sep 16, 2026On September 14, 2026, First Interstate BancSystem, Inc. (the “Company”), its wholly owned subsidiary First Interstate Bank (the “Bank”), and Mr. Jeff Lee formally executed an employment agreement (the “Employment Agreement”) that became effective as of September 14, 2026, as expected at the time of, and as previously …Director or officer change · Form 8-K
2. Aug 21, 2026Appointment of Chief Operations Officer On August 21, 2026, the registrant announced the appointment of Mr. Jeff Lee to become Executive Vice President and Chief Operations Officer of the registrant and its wholly owned subsidiary, First Interstate Bank (the “Bank”), with Mr. Lee’s employment starting date expected to …Director or officer change · Form 8-K
3. Jul 23, 2026On July 23, 2026, the Company also announced that the Board of Directors of the Company declared, on July 22, 2026, a dividend of $0.47 per share, that is payable August 14, 2026 to shareholders of record of the Company as of August 4, 2026.Earnings release · Form 8-K
4. Jul 16, 2026On July 13, 2026, the Board of Directors (the “Board”) of First Interstate BancSystem, Inc. (the “Company”) appointed Mr. Matthew Ritter and Mr. Kevin Turner to serve as Class II directors on the Board, each with a term expiring at the Company’s 2029 annual meeting of shareholders.Director or officer change · Form 8-K
5. Jul 9, 2026The registrant expects to conduct a national search for a replacement for this role, which role is expected to be performed by the registrant’s other in-house lawyers until a successor is appointed.Director or officer change · Form 8-K
6. May 29, 2026Pursuant to the director retirement policy set forth in the Corporate Governance Guidelines of First Interstate BancSystem, Inc. (the “Company”), on May 27, 2026, each of Ms. Patricia L. Moss and Messrs.Director or officer change · Form 8-K
7. May 13, 2026On May 11, 2026, First Interstate BancSystem, Inc. (the “Company”) announced that the employment as Executive Vice President and Chief Operations Officer of the Company (“COO”) and its wholly owned bank subsidiary by Ms. Kristina Robbins was terminated, without cause, effective immediately, and that Ms. Robbins …Director or officer change · Form 8-K
8. Apr 29, 2026On April 29, 2026, the Company also announced that the Board of Directors of the Company declared, on April 28, 2026, a dividend of $0.47 per share, that is payable May 21, 2026 to shareholders of record of the Company as of May 11, 2026.Earnings release · Form 8-K
9. Jan 28, 2026On January 28, 2026, the Company also announced that the Board of Directors of the Company declared, on January 27, 2026, a dividend of $0.47 per share, that is payable February 20, 2026 to shareholders of record of the Company as of February 10, 2026.Earnings release · Form 8-K
10. Nov 18, 2025On Novem ber 14, 2025, First Interstate BancSystem, Inc. (the “Company”) and Ms. Lorrie F. Asker, an Executive Vice President and Co-Chief Banking Officer (“Co-CBO”) of the Company, made a mutual decision at Ms. Asker’s prompting to terminate her service as such to the Company and to transition her employment with the …Director or officer change · Form 8-K
11. Oct 29, 2025On October 29, 2025, the Company also announced that the Board of Directors of the Company declared, on October 28, 2025, a dividend of $0.47 per share, that is payable November 20, 2025 to shareholders of record of the Company as of November 10, 2025.Earnings release · Form 8-K

Quoted from SEC EDGAR filings. A current report is filed within four business days of the event it describes.