NORTHWESTERN CORP

Ticker: NWE CUSIP: 668074305 Class: EQTY

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

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

Q4 2025

Shares 60,825 Value ($000) $3,926 Avg Close $62.82 Range $56.07 - $68.56

Q3 2025

Shares 60,878 Value ($000) $3,568 Avg Close $54.14 Range $49.85 - $58.24

Q2 2025

Shares 60,875 Value ($000) $3,123 Avg Close $53.53 Range $49.39 - $57.89

Q1 2025

Shares 60,765 Value ($000) $3,516 Avg Close $52.06 Range $48.49 - $56.12

Q4 2024

Shares 57,366 Value ($000) $3,067 Avg Close $51.38 Range $48.17 - $54.22

Q3 2024

Shares 58,003 Value ($000) $3,319 Avg Close $49.89 Range $45.22 - $54.21

Q2 2024

Shares 59,841 Value ($000) $2,997 Avg Close $46.58 Range $43.68 - $48.79

Q1 2024

Shares 61,275 Value ($000) $3,121 Avg Close $44.40 Range $41.90 - $47.03

Q4 2023

Shares 64,685 Value ($000) $3,292 Avg Close $44.88 Range $41.24 - $48.79

Q3 2023

Shares 66,179 Value ($000) $3,181 Avg Close $47.33 Range $42.66 - $51.72

Q2 2023

Shares 72,630 Value ($000) $4,122 Avg Close $51.34 Range $48.87 - $53.67

Q1 2023

Shares 72,347 Value ($000) $4,186 Avg Close $49.59 Range $46.79 - $52.43

Q4 2022

Shares 72,019 Value ($000) $4,274 Avg Close $46.84 Range $41.72 - $52.07

Q3 2022

Shares 68,852 Value ($000) $3,393 Avg Close $46.61 Range $42.04 - $51.24

Q2 2022

Shares 69,146 Value ($000) $4,075 Avg Close $49.98 Range $45.98 - $52.83

Q1 2022

Shares 69,973 Value ($000) $4,233 Avg Close $48.63 Range $46.08 - $51.75

Q4 2021

Shares 72,329 Value ($000) $4,134 Avg Close $46.70 Range $43.99 - $49.52

Q3 2021

Shares 69,481 Value ($000) $3,981 Avg Close $50.51 Range $46.92 - $53.26

Q2 2021

Shares 69,993 Value ($000) $4,215 Avg Close $52.44 Range $48.13 - $56.92

Q1 2021

Shares 76,569 Value ($000) $4,992 Avg Close $47.20 Range $42.31 - $53.28

Q4 2020

Shares 76,866 Value ($000) $4,482 Avg Close $43.87 Range $37.97 - $49.46

Q3 2020

Shares 77,004 Value ($000) $3,745 Avg Close $41.40 Range $37.35 - $45.52

Q2 2020

Shares 77,004 Value ($000) $4,198 Avg Close $44.67 Range $39.68 - $50.33

Q1 2020

Shares 77,004 Value ($000) $4,607 Avg Close $54.52 Range $34.68 - $61.46

Q4 2019

Shares 77,386 Value ($000) $5,546 Avg Close $54.65 Range $51.50 - $57.67

Q3 2019

Shares 78,949 Value ($000) $5,925 Avg Close $54.27 Range $50.60 - $58.08

Q2 2019

Shares 78,006 Value ($000) $5,628 Avg Close $53.01 Range $50.21 - $55.53

Q1 2019

Shares 77,413 Value ($000) $5,451 Avg Close $48.59 Range $42.38 - $53.49

Q4 2018

Shares 79,963 Value ($000) $4,753 Avg Close $45.03 Range $41.21 - $48.18

Q3 2018

Shares 77,349 Value ($000) $4,537 Avg Close $43.15 Range $40.65 - $45.13

Q2 2018

Shares 76,082 Value ($000) $4,356 Avg Close $39.06 Range $37.03 - $41.93

Q1 2018

Shares 75,683 Value ($000) $4,072 Avg Close $37.69 Range $35.55 - $42.53

Q4 2017

Shares 76,827 Value ($000) $4,587 Avg Close $42.54 Range $39.78 - $45.45

Q3 2017

Shares 78,046 Value ($000) $4,444 Avg Close $41.74 Range $40.09 - $43.18

Q2 2017

Shares 86,355 Value ($000) $5,269 Avg Close $42.35 Range $40.29 - $44.62

Q1 2017

Shares 95,905 Value ($000) $5,630 Avg Close $39.52 Range $38.19 - $41.05

Q4 2016

Shares 100,405 Value ($000) $5,710 Avg Close $38.33 Range $36.64 - $40.23

Q3 2016

Shares 103,105 Value ($000) $5,932 Avg Close $40.31 Range $38.22 - $43.00

Q2 2016

Shares 102,205 Value ($000) $6,446 Avg Close $39.68 Range $37.02 - $42.70

Q1 2016

Shares 99,985 Value ($000) $6,174 Avg Close $38.33 Range $34.60 - $41.62

Q4 2015

Shares 87,212 Value ($000) $4,731 Avg Close $35.84 Range $33.71 - $37.52

Q3 2015

Shares 85,812 Value ($000) $4,619 Avg Close $34.01 Range $31.66 - $36.90

Q2 2015

Shares 85,912 Value ($000) $4,188 Avg Close $33.40 Range $31.54 - $35.25

Q1 2015

Shares 85,941 Value ($000) $4,623 Avg Close $35.30 Range $32.73 - $38.16

Q4 2014

Shares 87,341 Value ($000) $4,942 Avg Close $33.16 Range $28.63 - $37.51

Q3 2014

Shares 72,232 Value ($000) $3,276 Avg Close $30.29 Range $28.46 - $33.15

Q2 2014

Shares 71,422 Value ($000) $3,728 Avg Close $30.04 Range $28.38 - $33.02

Q1 2014

Shares 68,822 Value ($000) $3,264 Avg Close $27.98 Range $26.36 - $29.86

Q4 2013

Shares 68,622 Value ($000) $2,973 Avg Close $27.40 Range $25.54 - $28.91

Q3 2013

Shares 68,122 Value ($000) $3,060 Avg Close $25.46 Range $23.73 - $28.10

Q2 2013

Shares 66,018 Value ($000) $2,634 Avg Close $24.78 Range $23.14 - $25.97

Q1 2013

Shares 63,279 Value ($000) $2,522 Avg Close $22.55 Range $20.88 - $24.27

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	60,825	$3,926	$62.82	$56.07 - $68.56
Q3 2025	60,878	$3,568	$54.14	$49.85 - $58.24
Q2 2025	60,875	$3,123	$53.53	$49.39 - $57.89
Q1 2025	60,765	$3,516	$52.06	$48.49 - $56.12
Q4 2024	57,366	$3,067	$51.38	$48.17 - $54.22
Q3 2024	58,003	$3,319	$49.89	$45.22 - $54.21
Q2 2024	59,841	$2,997	$46.58	$43.68 - $48.79
Q1 2024	61,275	$3,121	$44.40	$41.90 - $47.03
Q4 2023	64,685	$3,292	$44.88	$41.24 - $48.79
Q3 2023	66,179	$3,181	$47.33	$42.66 - $51.72
Q2 2023	72,630	$4,122	$51.34	$48.87 - $53.67
Q1 2023	72,347	$4,186	$49.59	$46.79 - $52.43
Q4 2022	72,019	$4,274	$46.84	$41.72 - $52.07
Q3 2022	68,852	$3,393	$46.61	$42.04 - $51.24
Q2 2022	69,146	$4,075	$49.98	$45.98 - $52.83
Q1 2022	69,973	$4,233	$48.63	$46.08 - $51.75
Q4 2021	72,329	$4,134	$46.70	$43.99 - $49.52
Q3 2021	69,481	$3,981	$50.51	$46.92 - $53.26
Q2 2021	69,993	$4,215	$52.44	$48.13 - $56.92
Q1 2021	76,569	$4,992	$47.20	$42.31 - $53.28
Q4 2020	76,866	$4,482	$43.87	$37.97 - $49.46
Q3 2020	77,004	$3,745	$41.40	$37.35 - $45.52
Q2 2020	77,004	$4,198	$44.67	$39.68 - $50.33
Q1 2020	77,004	$4,607	$54.52	$34.68 - $61.46
Q4 2019	77,386	$5,546	$54.65	$51.50 - $57.67
Q3 2019	78,949	$5,925	$54.27	$50.60 - $58.08
Q2 2019	78,006	$5,628	$53.01	$50.21 - $55.53
Q1 2019	77,413	$5,451	$48.59	$42.38 - $53.49
Q4 2018	79,963	$4,753	$45.03	$41.21 - $48.18
Q3 2018	77,349	$4,537	$43.15	$40.65 - $45.13
Q2 2018	76,082	$4,356	$39.06	$37.03 - $41.93
Q1 2018	75,683	$4,072	$37.69	$35.55 - $42.53
Q4 2017	76,827	$4,587	$42.54	$39.78 - $45.45
Q3 2017	78,046	$4,444	$41.74	$40.09 - $43.18
Q2 2017	86,355	$5,269	$42.35	$40.29 - $44.62
Q1 2017	95,905	$5,630	$39.52	$38.19 - $41.05
Q4 2016	100,405	$5,710	$38.33	$36.64 - $40.23
Q3 2016	103,105	$5,932	$40.31	$38.22 - $43.00
Q2 2016	102,205	$6,446	$39.68	$37.02 - $42.70
Q1 2016	99,985	$6,174	$38.33	$34.60 - $41.62
Q4 2015	87,212	$4,731	$35.84	$33.71 - $37.52
Q3 2015	85,812	$4,619	$34.01	$31.66 - $36.90
Q2 2015	85,912	$4,188	$33.40	$31.54 - $35.25
Q1 2015	85,941	$4,623	$35.30	$32.73 - $38.16
Q4 2014	87,341	$4,942	$33.16	$28.63 - $37.51
Q3 2014	72,232	$3,276	$30.29	$28.46 - $33.15
Q2 2014	71,422	$3,728	$30.04	$28.38 - $33.02
Q1 2014	68,822	$3,264	$27.98	$26.36 - $29.86
Q4 2013	68,622	$2,973	$27.40	$25.54 - $28.91
Q3 2013	68,122	$3,060	$25.46	$23.73 - $28.10
Q2 2013	66,018	$2,634	$24.78	$23.14 - $25.97
Q1 2013	63,279	$2,522	$22.55	$20.88 - $24.27