Harper Grace Scott Trust 4

What Happened
Jonathan R. Scott, reported as a 10% owner of First Interstate BancSystem, Inc. (FIBK), sold 53,504 shares in an open-market transaction on April 30, 2026. The shares were sold at a weighted-average price of $35.42, generating proceeds of approximately $1,895,112. This was a sale (not a purchase), which is often routine insider selling rather than a bullish signal.

Key Details

• Transaction date: 2026-04-30 (filed with the SEC 2026-05-01). Filing appears timely.
• Sale details: 53,504 shares sold; weighted-average price $35.42; price range across trades $35.13–$35.70 (per footnote F1).
• Reported holdings (per footnote F2): holdings of record total 879,520 shares across several entities; after this sale that aggregate would be reduced by 53,504 shares (approximately 826,016 remaining on a pro forma basis).
• Footnotes of note: F1 explains the weighted-average price and that per-price breakdowns can be provided on request; F2 lists the record holders that make up reported ownership; F3 states the reporting persons may be part of a group and disclaim beneficial ownership except for pecuniary interest.
• Transaction type: Open-market sale (code S). No option exercise, gift, or tax-withholding noted.

Context
This filing involves a 10% owner rather than an executive officer — large-shareholder sales can be driven by personal or portfolio reasons and are not direct statements about company operations. The filing includes group/beneficial-ownership disclosures (F3), which can affect how ownership percentages are interpreted.