Harper Grace Scott Trust 4

What Happened
Jonathan R. Scott, reported as a 10% owner of First Interstate BancSystem, Inc. (FIBK), sold 3,000 shares in an open-market transaction on March 26, 2026. The weighted-average sale price was $33.45 per share (prices ranged $33.31–$33.55), for gross proceeds of approximately $100,350. This was a sale (not a purchase); sales by insiders are common and do not by themselves signal management sentiment.

Key Details

• Transaction date: 2026-03-26; Form 4 filed 2026-03-27 (filed next day, appears timely).
• Type: Open-market sale (code S).
• Quantity & price: 3,000 shares sold at a weighted-average $33.45; individual trades ranged $33.31–$33.55 (footnote F1).
• Proceeds: ~ $100,350.
• Shares owned (per filing footnote F2): beneficial/record holdings total 933,024 shares across trusts and entities; after this 3,000-share sale that would be roughly 930,024 shares (calculation based on footnote).
• Notable footnotes: F1 explains the weighted-average price and range; F2 breaks down record holdings by trusts/entities; F3 notes the reporting persons may be deemed part of a group and disclaims broader beneficial ownership except for pecuniary interest.

Context
As a reported 10% owner, Scott is a large shareholder; such sales can reflect diversification, estate or tax planning, or routine liquidity needs rather than a view on the company. This filing documents a straightforward open-market sale—no option exercise, gift, or tax-withholding transaction was reported.