NORTHWESTERN CORP

Ticker: NWE CUSIP: 668074305 Class: EQTY

BROWN BROTHERS HARRIMAN & CO's Holding History (CIK: 0000014661)

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

Q4 2025

Shares 150 Value ($000) $10 Avg Close $62.82 Range $56.07 - $68.56

Q4 2024

Shares 8 Value ($000) $0 Avg Close $51.38 Range $48.17 - $54.22

Q3 2024

Shares 59 Value ($000) $3 Avg Close $49.89 Range $45.22 - $54.21

Q4 2023

Shares 150 Value ($000) $8 Avg Close $44.88 Range $41.24 - $48.79

Q3 2023

Shares 150 Value ($000) $7 Avg Close $47.33 Range $42.66 - $51.72

Q2 2023

Shares 150 Value ($000) $9 Avg Close $51.34 Range $48.87 - $53.67

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	150	$10	$62.82	$56.07 - $68.56
Q4 2024	8	$0	$51.38	$48.17 - $54.22
Q3 2024	59	$3	$49.89	$45.22 - $54.21
Q4 2023	150	$8	$44.88	$41.24 - $48.79
Q3 2023	150	$7	$47.33	$42.66 - $51.72
Q2 2023	150	$9	$51.34	$48.87 - $53.67