4

Changes in Ownership

FIRST INTERSTATE BANCSYSTEM INC Filed 2025-10-03 Acc 0001493152-25-016804

10% owner sold 10,000 shares at $31.59 ($315,900)

10% owner disposed of 264,796 shares (code W)

From the SEC's structured data for this filing

Trades in this filing

Insider	Date	Transaction	Shares	Price	Value	Owned after	D/I
Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees 10% owner	2025-09-09	Other disposition	−152,160			367,096	I
Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees 10% owner	2025-09-10	Other disposition	−45,154			321,942	I
Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees 10% owner	2025-09-17	Other disposition	−67,482			254,460	I
Susan Scott Heyneman Trust, Susan Heyneman & First Interstate Wealth Management Co-Trustees 10% owner	2025-10-01	Sale	−10,000	$31.59	$315,900	244,460	I
Open-market sales · 10,000 sh · avg $31.59 · $315,900