NORTHWESTERN CORP

Ticker: NWE CUSIP: 668074305 Class: EQTY

MASSACHUSETTS FINANCIAL SERVICES CO /MA/'s Holding History (CIK: 0000912938)

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

Q4 2025

Shares 569,334 Value ($000) $36,745 Avg Close $62.82 Range $56.07 - $68.56

Q3 2025

Shares 646,893 Value ($000) $37,914 Avg Close $54.14 Range $49.85 - $58.24

Q2 2025

Shares 853,232 Value ($000) $43,771 Avg Close $53.53 Range $49.39 - $57.89

Q1 2025

Shares 895,798 Value ($000) $51,840 Avg Close $52.06 Range $48.49 - $56.12

Q4 2024

Shares 917,497 Value ($000) $49,049 Avg Close $51.38 Range $48.17 - $54.22

Q3 2024

Shares 1,094,714 Value ($000) $62,640 Avg Close $49.89 Range $45.22 - $54.21

Q2 2024

Shares 1,125,546 Value ($000) $56,367 Avg Close $46.58 Range $43.68 - $48.79

Q1 2024

Shares 1,145,832 Value ($000) $58,357 Avg Close $44.40 Range $41.90 - $47.03

Q4 2023

Shares 968,054 Value ($000) $49,264 Avg Close $44.88 Range $41.24 - $48.79

Q3 2023

Shares 759,728 Value ($000) $36,513 Avg Close $47.33 Range $42.66 - $51.72

Q1 2017

Shares 606,598 Value ($000) $35,607 Avg Close $39.52 Range $38.19 - $41.05

Q4 2016

Shares 1,271,397 Value ($000) $72,304 Avg Close $38.33 Range $36.64 - $40.23

Q3 2016

Shares 1,450,519 Value ($000) $83,448 Avg Close $40.31 Range $38.22 - $43.00

Q2 2016

Shares 1,672,342 Value ($000) $105,475 Avg Close $39.68 Range $37.02 - $42.70

Q1 2016

Shares 1,668,402 Value ($000) $103,024 Avg Close $38.33 Range $34.60 - $41.62

Q4 2015

Shares 1,745,689 Value ($000) $94,703 Avg Close $35.84 Range $33.71 - $37.52

Q3 2015

Shares 2,109,931 Value ($000) $113,578 Avg Close $34.01 Range $31.66 - $36.90

Q2 2015

Shares 1,931,412 Value ($000) $94,156,335 Avg Close $33.40 Range $31.54 - $35.25

Q1 2015

Shares 1,698,396 Value ($000) $91,356,721 Avg Close $35.30 Range $32.73 - $38.16

Q4 2014

Shares 1,838,755 Value ($000) $104,036,757 Avg Close $33.16 Range $28.63 - $37.51

Q3 2014

Shares 817,426 Value ($000) $37,079 Avg Close $30.29 Range $28.46 - $33.15

Q2 2014

Shares 762,406 Value ($000) $39,790 Avg Close $30.04 Range $28.38 - $33.02

Q1 2014

Shares 871,664 Value ($000) $41,343,024 Avg Close $27.98 Range $26.36 - $29.86

Q4 2013

Shares 855,034 Value ($000) $37,040,073 Avg Close $27.40 Range $25.54 - $28.91

Q3 2013

Shares 774,634 Value ($000) $34,796,559 Avg Close $25.46 Range $23.73 - $28.10

Q2 2013

Shares 893,128 Value ($000) $35,635,807 Avg Close $24.78 Range $23.14 - $25.97

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	569,334	$36,745	$62.82	$56.07 - $68.56
Q3 2025	646,893	$37,914	$54.14	$49.85 - $58.24
Q2 2025	853,232	$43,771	$53.53	$49.39 - $57.89
Q1 2025	895,798	$51,840	$52.06	$48.49 - $56.12
Q4 2024	917,497	$49,049	$51.38	$48.17 - $54.22
Q3 2024	1,094,714	$62,640	$49.89	$45.22 - $54.21
Q2 2024	1,125,546	$56,367	$46.58	$43.68 - $48.79
Q1 2024	1,145,832	$58,357	$44.40	$41.90 - $47.03
Q4 2023	968,054	$49,264	$44.88	$41.24 - $48.79
Q3 2023	759,728	$36,513	$47.33	$42.66 - $51.72
Q1 2017	606,598	$35,607	$39.52	$38.19 - $41.05
Q4 2016	1,271,397	$72,304	$38.33	$36.64 - $40.23
Q3 2016	1,450,519	$83,448	$40.31	$38.22 - $43.00
Q2 2016	1,672,342	$105,475	$39.68	$37.02 - $42.70
Q1 2016	1,668,402	$103,024	$38.33	$34.60 - $41.62
Q4 2015	1,745,689	$94,703	$35.84	$33.71 - $37.52
Q3 2015	2,109,931	$113,578	$34.01	$31.66 - $36.90
Q2 2015	1,931,412	$94,156,335	$33.40	$31.54 - $35.25
Q1 2015	1,698,396	$91,356,721	$35.30	$32.73 - $38.16
Q4 2014	1,838,755	$104,036,757	$33.16	$28.63 - $37.51
Q3 2014	817,426	$37,079	$30.29	$28.46 - $33.15
Q2 2014	762,406	$39,790	$30.04	$28.38 - $33.02
Q1 2014	871,664	$41,343,024	$27.98	$26.36 - $29.86
Q4 2013	855,034	$37,040,073	$27.40	$25.54 - $28.91
Q3 2013	774,634	$34,796,559	$25.46	$23.73 - $28.10
Q2 2013	893,128	$35,635,807	$24.78	$23.14 - $25.97