NORTHWESTERN CORP

Ticker: NWE CUSIP: 668074305 Class: EQTY

ADAGE CAPITAL PARTNERS GP, L.L.C.'s Holding History (CIK: 0001165408)

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

Q4 2025

Shares 812,500 Value ($000) $52,439 Avg Close $62.82 Range $56.07 - $68.56

Q2 2023

Shares 100,000 Value ($000) $5,676 Avg Close $51.34 Range $48.87 - $53.67

Q4 2021

Shares 180,000 Value ($000) $10,289 Avg Close $46.70 Range $43.99 - $49.52

Q4 2013

Shares 950,010 Value ($000) $41,154 Avg Close $27.40 Range $25.54 - $28.91

Q3 2013

Shares 1,000,010 Value ($000) $44,920 Avg Close $25.46 Range $23.73 - $28.10

Q2 2013

Shares 1,000,010 Value ($000) $39,900 Avg Close $24.78 Range $23.14 - $25.97

Q1 2013

Shares 1,000,010 Value ($000) $39,860 Avg Close $22.55 Range $20.88 - $24.27

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	812,500	$52,439	$62.82	$56.07 - $68.56
Q2 2023	100,000	$5,676	$51.34	$48.87 - $53.67
Q4 2021	180,000	$10,289	$46.70	$43.99 - $49.52
Q4 2013	950,010	$41,154	$27.40	$25.54 - $28.91
Q3 2013	1,000,010	$44,920	$25.46	$23.73 - $28.10
Q2 2013	1,000,010	$39,900	$24.78	$23.14 - $25.97
Q1 2013	1,000,010	$39,860	$22.55	$20.88 - $24.27