NORTHWESTERN CORP

Ticker: NWE CUSIP: 668074305 Class: EQTY

RHUMBLINE ADVISERS's Holding History (CIK: 0001115418)

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

Q4 2025

Shares 193,573 Value ($000) $12,493 Avg Close $62.82 Range $56.07 - $68.56

Q3 2025

Shares 217,618 Value ($000) $12,755 Avg Close $54.14 Range $49.85 - $58.24

Q2 2025

Shares 221,810 Value ($000) $11,379 Avg Close $53.53 Range $49.39 - $57.89

Q1 2025

Shares 209,878 Value ($000) $12,146 Avg Close $52.06 Range $48.49 - $56.12

Q4 2024

Shares 214,973 Value ($000) $11,492 Avg Close $51.38 Range $48.17 - $54.22

Q3 2024

Shares 214,016 Value ($000) $12,246 Avg Close $49.89 Range $45.22 - $54.21

Q2 2024

Shares 221,150 Value ($000) $11,075 Avg Close $46.58 Range $43.68 - $48.79

Q1 2024

Shares 220,198 Value ($000) $11,215 Avg Close $44.40 Range $41.90 - $47.03

Q4 2023

Shares 218,620 Value ($000) $11,126 Avg Close $44.88 Range $41.24 - $48.79

Q3 2023

Shares 221,302 Value ($000) $10,636 Avg Close $47.33 Range $42.66 - $51.72

Q2 2023

Shares 215,551 Value ($000) $12,235 Avg Close $51.34 Range $48.87 - $53.67

Q1 2023

Shares 205,135 Value ($000) $12 Avg Close $49.59 Range $46.79 - $52.43

Q4 2022

Shares 204,432 Value ($000) $12 Avg Close $46.84 Range $41.72 - $52.07

Q3 2022

Shares 193,097 Value ($000) $9,516 Avg Close $46.61 Range $42.04 - $51.24

Q2 2022

Shares 180,488 Value ($000) $10,636 Avg Close $49.98 Range $45.98 - $52.83

Q1 2022

Shares 165,505 Value ($000) $10,011 Avg Close $48.63 Range $46.08 - $51.75

Q4 2021

Shares 162,759 Value ($000) $9,303 Avg Close $46.70 Range $43.99 - $49.52

Q3 2021

Shares 159,816 Value ($000) $9,157 Avg Close $50.51 Range $46.92 - $53.26

Q2 2021

Shares 157,112 Value ($000) $9,461 Avg Close $52.44 Range $48.13 - $56.92

Q1 2021

Shares 164,409 Value ($000) $10,719 Avg Close $47.20 Range $42.31 - $53.28

Q4 2020

Shares 169,026 Value ($000) $9,856 Avg Close $43.87 Range $37.97 - $49.46

Q3 2020

Shares 155,297 Value ($000) $7,554 Avg Close $41.40 Range $37.35 - $45.52

Q2 2020

Shares 177,595 Value ($000) $9,682 Avg Close $44.67 Range $39.68 - $50.33

Q1 2020

Shares 173,874 Value ($000) $10,403 Avg Close $54.52 Range $34.68 - $61.46

Q4 2019

Shares 165,156 Value ($000) $11,837 Avg Close $54.65 Range $51.50 - $57.67

Q3 2019

Shares 166,121 Value ($000) $12,467 Avg Close $54.27 Range $50.60 - $58.08

Q2 2019

Shares 162,523 Value ($000) $11,726 Avg Close $53.01 Range $50.21 - $55.53

Q1 2019

Shares 161,675 Value ($000) $11,384 Avg Close $48.59 Range $42.38 - $53.49

Q4 2018

Shares 159,256 Value ($000) $9,466 Avg Close $45.03 Range $41.21 - $48.18

Q3 2018

Shares 93,041 Value ($000) $5,458 Avg Close $43.15 Range $40.65 - $45.13

Q2 2018

Shares 92,305 Value ($000) $5,284 Avg Close $39.06 Range $37.03 - $41.93

Q1 2018

Shares 90,682 Value ($000) $4,879 Avg Close $37.69 Range $35.55 - $42.53

Q4 2017

Shares 95,389 Value ($000) $5,695 Avg Close $42.54 Range $39.78 - $45.45

Q3 2017

Shares 103,170 Value ($000) $5,874 Avg Close $41.74 Range $40.09 - $43.18

Q2 2017

Shares 103,745 Value ($000) $6,331 Avg Close $42.35 Range $40.29 - $44.62

Q1 2017

Shares 103,996 Value ($000) $6,105 Avg Close $39.52 Range $38.19 - $41.05

Q4 2016

Shares 99,096 Value ($000) $5,636 Avg Close $38.33 Range $36.64 - $40.23

Q3 2016

Shares 105,944 Value ($000) $6,095 Avg Close $40.31 Range $38.22 - $43.00

Q2 2016

Shares 76,934 Value ($000) $4,852 Avg Close $39.68 Range $37.02 - $42.70

Q1 2016

Shares 89,191 Value ($000) $5,508 Avg Close $38.33 Range $34.60 - $41.62

Q4 2015

Shares 82,261 Value ($000) $4,463 Avg Close $35.84 Range $33.71 - $37.52

Q3 2015

Shares 79,366 Value ($000) $4,272 Avg Close $34.01 Range $31.66 - $36.90

Q2 2015

Shares 75,562 Value ($000) $3,684 Avg Close $33.40 Range $31.54 - $35.25

Q1 2015

Shares 77,632 Value ($000) $4,176 Avg Close $35.30 Range $32.73 - $38.16

Q4 2014

Shares 75,017 Value ($000) $4,244 Avg Close $33.16 Range $28.63 - $37.51

Q3 2014

Shares 65,067 Value ($000) $2,951 Avg Close $30.29 Range $28.46 - $33.15

Q2 2014

Shares 64,517 Value ($000) $3,367 Avg Close $30.04 Range $28.38 - $33.02

Q1 2014

Shares 66,612 Value ($000) $3,159 Avg Close $27.98 Range $26.36 - $29.86

Q4 2013

Shares 67,982 Value ($000) $2,945 Avg Close $27.40 Range $25.54 - $28.91

Q3 2013

Shares 70,197 Value ($000) $3,153 Avg Close $25.46 Range $23.73 - $28.10

Q2 2013

Shares 70,373 Value ($000) $2,808 Avg Close $24.78 Range $23.14 - $25.97

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	193,573	$12,493	$62.82	$56.07 - $68.56
Q3 2025	217,618	$12,755	$54.14	$49.85 - $58.24
Q2 2025	221,810	$11,379	$53.53	$49.39 - $57.89
Q1 2025	209,878	$12,146	$52.06	$48.49 - $56.12
Q4 2024	214,973	$11,492	$51.38	$48.17 - $54.22
Q3 2024	214,016	$12,246	$49.89	$45.22 - $54.21
Q2 2024	221,150	$11,075	$46.58	$43.68 - $48.79
Q1 2024	220,198	$11,215	$44.40	$41.90 - $47.03
Q4 2023	218,620	$11,126	$44.88	$41.24 - $48.79
Q3 2023	221,302	$10,636	$47.33	$42.66 - $51.72
Q2 2023	215,551	$12,235	$51.34	$48.87 - $53.67
Q1 2023	205,135	$12	$49.59	$46.79 - $52.43
Q4 2022	204,432	$12	$46.84	$41.72 - $52.07
Q3 2022	193,097	$9,516	$46.61	$42.04 - $51.24
Q2 2022	180,488	$10,636	$49.98	$45.98 - $52.83
Q1 2022	165,505	$10,011	$48.63	$46.08 - $51.75
Q4 2021	162,759	$9,303	$46.70	$43.99 - $49.52
Q3 2021	159,816	$9,157	$50.51	$46.92 - $53.26
Q2 2021	157,112	$9,461	$52.44	$48.13 - $56.92
Q1 2021	164,409	$10,719	$47.20	$42.31 - $53.28
Q4 2020	169,026	$9,856	$43.87	$37.97 - $49.46
Q3 2020	155,297	$7,554	$41.40	$37.35 - $45.52
Q2 2020	177,595	$9,682	$44.67	$39.68 - $50.33
Q1 2020	173,874	$10,403	$54.52	$34.68 - $61.46
Q4 2019	165,156	$11,837	$54.65	$51.50 - $57.67
Q3 2019	166,121	$12,467	$54.27	$50.60 - $58.08
Q2 2019	162,523	$11,726	$53.01	$50.21 - $55.53
Q1 2019	161,675	$11,384	$48.59	$42.38 - $53.49
Q4 2018	159,256	$9,466	$45.03	$41.21 - $48.18
Q3 2018	93,041	$5,458	$43.15	$40.65 - $45.13
Q2 2018	92,305	$5,284	$39.06	$37.03 - $41.93
Q1 2018	90,682	$4,879	$37.69	$35.55 - $42.53
Q4 2017	95,389	$5,695	$42.54	$39.78 - $45.45
Q3 2017	103,170	$5,874	$41.74	$40.09 - $43.18
Q2 2017	103,745	$6,331	$42.35	$40.29 - $44.62
Q1 2017	103,996	$6,105	$39.52	$38.19 - $41.05
Q4 2016	99,096	$5,636	$38.33	$36.64 - $40.23
Q3 2016	105,944	$6,095	$40.31	$38.22 - $43.00
Q2 2016	76,934	$4,852	$39.68	$37.02 - $42.70
Q1 2016	89,191	$5,508	$38.33	$34.60 - $41.62
Q4 2015	82,261	$4,463	$35.84	$33.71 - $37.52
Q3 2015	79,366	$4,272	$34.01	$31.66 - $36.90
Q2 2015	75,562	$3,684	$33.40	$31.54 - $35.25
Q1 2015	77,632	$4,176	$35.30	$32.73 - $38.16
Q4 2014	75,017	$4,244	$33.16	$28.63 - $37.51
Q3 2014	65,067	$2,951	$30.29	$28.46 - $33.15
Q2 2014	64,517	$3,367	$30.04	$28.38 - $33.02
Q1 2014	66,612	$3,159	$27.98	$26.36 - $29.86
Q4 2013	67,982	$2,945	$27.40	$25.54 - $28.91
Q3 2013	70,197	$3,153	$25.46	$23.73 - $28.10
Q2 2013	70,373	$2,808	$24.78	$23.14 - $25.97