FIRST INTST BANCSYSTEM INC

Ticker: FIBK CUSIP: 32055Y201 Class: Common Stock

BlackRock, Inc.'s Holding History (CIK: 0002012383)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 13,614,268 Value ($000) $471,054 Avg Close $32.13 Range $28.33 - $35.91

Q3 2025

Shares 7,416,890 Value ($000) $236,376 Avg Close $30.08 Range $26.44 - $33.09

Q2 2025

Shares 7,595,846 Value ($000) $218,912 Avg Close $25.62 Range $21.60 - $28.14

Q1 2025

Shares 7,627,081 Value ($000) $218,516 Avg Close $28.99 Range $25.84 - $31.59

Q4 2024

Shares 7,885,387 Value ($000) $256,039 Avg Close $30.02 Range $26.60 - $34.12

Q3 2024

Shares 7,572,116 Value ($000) $232,313 Avg Close $27.10 Range $24.27 - $29.66

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	13,614,268	$471,054	$32.13	$28.33 - $35.91
Q3 2025	7,416,890	$236,376	$30.08	$26.44 - $33.09
Q2 2025	7,595,846	$218,912	$25.62	$21.60 - $28.14
Q1 2025	7,627,081	$218,516	$28.99	$25.84 - $31.59
Q4 2024	7,885,387	$256,039	$30.02	$26.60 - $34.12
Q3 2024	7,572,116	$232,313	$27.10	$24.27 - $29.66