NORTHWESTERN CORP

Ticker: NWE CUSIP: 668074305 Class: EQTY

S.A. Mason LLC's Holding History (CIK: 0001800911)

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

Q2 2025

Shares 567 Value ($000) $29 Avg Close $53.53 Range $49.39 - $57.89

Q1 2025

Shares 567 Value ($000) $33 Avg Close $52.06 Range $48.49 - $56.12

Q4 2024

Shares 554 Value ($000) $30 Avg Close $51.38 Range $48.17 - $54.22

Period	Shares	Value ($000)	Average Close	Price Range
Q2 2025	567	$29	$53.53	$49.39 - $57.89
Q1 2025	567	$33	$52.06	$48.49 - $56.12
Q4 2024	554	$30	$51.38	$48.17 - $54.22