NorthWestern Energy Group, Inc.

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC NWE

Report date

12/31/2025

Quarter

2025 Q4

Filed

2/9/2026

Shares

413,328

Value ($000)

26,676

Weight

0.1%

2021 Q2 - 2025 Q4 (19 filings)

Shares History

History scope: non-option holdings only (PUT/CALL rows excluded).

All 13F Holders	Filing date	Value ($000s)	% of Holdings	Shares	Reporting period
2025 Q4	2/9/2026	26,676	0.1%	413,328	12/31/2025
2025 Q3	11/12/2025	26,739	0.1%	456,220	9/30/2025
2025 Q2	7/29/2025	24,823	0.1%	483,874	6/30/2025
2025 Q1	5/9/2025	30,340	0.1%	524,278	3/31/2025
2024 Q4	2/10/2025	29,513	0.1%	552,052	12/31/2024
2024 Q3	11/8/2024	30,824	0.1%	538,700	9/30/2024
2024 Q2	8/8/2024	27,796	0.1%	555,041	6/30/2024
2024 Q1	5/8/2024	28,321	0.1%	556,073	3/31/2024
2023 Q4	2/9/2024	28,313	0.1%	556,348	12/31/2023
2023 Q3	11/9/2023	27,252	0.1%	567,032	9/30/2023
2023 Q2	8/11/2023	34,543	0.1%	608,578	6/30/2023
2023 Q1	5/12/2023	34,558	0.1%	597,267	3/31/2023
2022 Q4	2/9/2023	35,312	0.1%	595,084	12/31/2022
2022 Q3	11/9/2022	30,456	0.1%	618,010	9/30/2022
2022 Q2	8/10/2022	37,154	0.1%	630,482	6/30/2022
2022 Q1	5/11/2022	35,485	0.1%	586,627	3/31/2022
2021 Q4	2/14/2022	33,959	0.1%	594,100	12/31/2021
2021 Q3	11/10/2021	36,755	0.1%	641,443	9/30/2021
2021 Q2	8/12/2021	79	0.0%	1,315	6/30/2021