No Securities Beneficially Owned by Christopher L. Shepler

The SEC filing reports that Christopher L. Shepler, Chief Banking Officer of First Interstate BancSystem Inc, does not beneficially own any securities as of the period of report on September 10, 2025. The filing delay was attributed to the EDGAR Next enrollment process. The document includes a Power of Attorney as Exhibit 24. Shepler's direct ownership of common stock is reported as zero.