NorthWestern Energy Group, Inc.
US ˙ NasdaqGS ˙ US6680743050

SecurityNWE / NorthWestern Energy Group, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership809,560 shares
Latest Disclosed Value $ 53,382,387
Northern Trust Corp reports 5.91% increase in ownership of NWE / NorthWestern Energy Group, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 809,560 shares of NorthWestern Energy Group, Inc. (US:NWE) valued at $53,382,386 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 764,406 shares of NorthWestern Energy Group, Inc.. This represents a change in shares of 5.91% during the quarter. The current value of the position is $56,353,472 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 809,560 45,154 5.91 53,382 8.21 0.0014
2026-02-17 2025-12-31 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 764,406 -47,343 -5.83 49,335 3.70 0.0013
2025-11-14 2025-09-30 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 811,749 -4,796 -0.59 47,577 13.58 0.0014
2025-08-13 2025-06-30 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 816,545 -56,799 -6.50 41,889 -17.12 0.0058
2025-05-13 2025-03-31 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 873,344 -20,819 -2.33 50,540 5.73 0.0075
2025-02-14 2024-12-31 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 894,163 91,977 11.47 47,802 4.14 0.0068
2024-11-13 2024-09-30 13F NORTHWESTERN ENERGY GROUP IN COM 668074305 802,186 1,976 0.25 45,901 14.54 0.0075
2024-08-14 2024-06-30 13F NORTHWESTERN ENERGY GROUP IN COM 668074305 800,210 47,378 6.29 40,075 4.52 0.0068
2024-05-14 2024-03-31 13F NORTHWESTERN ENERGY GROUP IN COM 668074305 752,832 -84,620 -10.10 38,342 -10.03 0.0066
2024-02-13 2023-12-31 13F NORTHWESTERN ENERGY GROUP IN COM 668074305 837,452 44,223 5.58 42,618 11.79 0.0077
2023-11-13 2023-09-30 13F NORTHWESTERN COM 668074305 793,229 -21,441 -2.63 38,123 -17.56 0.0074
2023-08-11 2023-06-30 13F NORTHWESTERN COM 668074305 814,670 8,194 1.02 46,241 -0.90 0.0089
2023-05-15 2023-03-31 13F NORTHWESTERN COM 668074305 806,476 -12,716 -1.55 46,663 -4.01 0.0093
2023-02-13 2022-12-31 13F NORTHWESTERN COM 668074305 819,192 12,641 1.57 48,611 22.30 0.0102
2022-11-14 2022-09-30 13F NORTHWESTERN COM 668074305 806,551 12,516 1.58 39,747 -15.06 0.0091
2022-08-12 2022-06-30 13F NORTHWESTERN COM 668074305 794,035 -16,679 -2.06 46,793 -4.58 0.0100
2022-05-13 2022-03-31 13F NORTHWESTERN COM 668074305 810,714 -15,100 -1.83 49,040 3.89 0.0086
2022-02-08 2021-12-31 13F NORTHWESTERN COM NEW 668074305 825,814 -6,552 -0.79 47,203 -1.03 0.0077
2021-11-15 2021-09-30 13F NORTHWESTERN COM NEW 668074305 832,366 5,252 0.63 47,694 -4.24 0.0084
2021-08-13 2021-06-30 13F NORTHWESTERN COM NEW 668074305 827,114 -244,672 -22.83 49,808 -28.72 0.0088
2021-05-12 2021-03-31 13F NORTHWESTERN COM NEW 668074305 1,071,786 -362,917 -25.30 69,879 -16.47 0.0130
2021-02-11 2020-12-31 13F NORTHWESTERN COM NEW 668074305 1,434,703 -25,057 -1.72 83,657 17.82 0.0163
2020-11-16 2020-09-30 13F NORTHWESTERN COM NEW 668074305 1,459,760 -59,753 -3.93 71,003 -14.29 0.0156
2020-08-14 2020-06-30 13F NORTHWESTERN COM 668074305 1,519,513 3,503 0.23 82,843 -8.67 0.0196
2020-05-14 2020-03-31 13F NORTHWESTERN COM NEW 668074305 1,516,010 11,791 0.78 90,704 -15.86 0.0260
2020-02-14 2019-12-31 13F NORTHWESTERN COM NEW 668074305 1,504,219 -7,475 -0.49 107,806 -4.98 0.0241
2019-11-13 2019-09-30 13F NORTHWESTERN COM 668074305 1,511,694 27,152 1.83 113,452 5.92 0.0272
2019-08-13 2019-06-30 13F NORTHWESTERN COM NEW 668074305 1,484,542 87,661 6.28 107,109 8.90 0.0254
2019-05-13 2019-03-31 13F NORTHWESTERN COM NEW 668074305 1,396,881 14,852 1.07 98,355 19.73 0.0243
2019-02-12 2018-12-31 13F NORTHWESTERN COM NEW 668074305 1,382,029 5,360 0.39 82,148 1.72 0.0230
2018-11-14 2018-09-30 13F NORTHWESTERN COM NEW 668074305 1,376,669 -18,373 -1.32 80,755 1.11 0.0198
2018-09-18 2018-06-30 13F/A-1 NORTHWESTERN COM NEW 668074305 1,395,042 -70,870 -4.83 79,866 1.27 0.0203
2018-08-14 2018-06-30 13F NORTHWESTERN COM NEW 668074305 1,398,243 -67,669 80,050
2018-05-09 2018-03-31 13F NORTHWESTERN COM NEW 668074305 1,465,912 88,251 6.41 78,866 -4.11 0.0205
2018-02-14 2017-12-31 13F NORTHWESTERN COM NEW 668074305 1,377,661 -30,939 -2.20 82,245 2.54 0.0208
2017-11-13 2017-09-30 13F NORTHWESTERN COM NEW 668074305 1,408,600 4,096 0.29 80,206 -6.41 0.0209
2017-08-11 2017-06-30 13F NORTHWESTERN COM 668074305 1,404,504 96,231 7.36 85,702 11.60 0.0240
2017-05-12 2017-03-31 13F NORTHWESTERN COM 668074305 1,308,273 33,418 2.62 76,795 5.92 0.0221
2017-02-13 2016-12-31 13F NORTHWESTERN COM 668074305 1,274,855 8,924 0.70 72,500 -0.45 0.0222
2016-11-09 2016-09-30 13F NORTHWESTERN COM 668074305 1,265,931 180,113 16.59 72,828 6.34 0.0227
2016-08-12 2016-06-30 13F NORTHWESTERN COM NEW 668074305 1,085,818 42,218 4.05 68,484 6.70 0.0222
2016-08-19 2016-03-31 13F/A-1 NORTHWESTERN COM NEW 668074305 1,043,600 6,773 0.65 64,184 14.11 0.0213
2016-05-13 2016-03-31 13F Northwestern COMM 668074305 1,043,597 64,442
2016-02-12 2015-12-31 13F Northwestern COMM 668074305 1,036,827 17,863 1.75 56,248 2.55 0.0186
2015-11-12 2015-09-30 13F Northwestern COMM 668074305 1,018,964 1,018,964 0.00 54,850 0.0183
2015-08-13 2015-06-30 13F Northwestern COMM 668074305 0 -1,037,302 -100.00 0 -100.00
2015-05-14 2015-03-31 13F Northwestern COMM 668074305 1,037,302 47,232 4.77 55,798 -0.39 0.0168
2015-02-12 2014-12-31 13F Northwestern COM 668074305 990,070 64,524 6.97 56,018 33.43 0.0169
2014-11-13 2014-09-30 13F Northwestern COMM 668074305 925,546 9,813 1.07 41,982 -12.16 0.0132
2014-08-14 2014-06-30 13F NORTHWESTERN com 668074305 915,733 -42,900 -4.48 47,792 5.11 0.0149
2014-05-14 2014-03-31 13F NORTHWESTERN COMM 668074305 958,633 -20,626 -2.11 45,468 7.18 0.0143
2014-02-21 2013-12-31 13F/A-1 NORTHWESTERN COM 668074305 979,259 -2,532 -0.26 42,422 -3.81 0.0136
2014-02-12 2013-12-31 13F NORTHWESTERN COM 668074305 979,259 42,422
2013-11-13 2013-09-30 13F NORTHWESTERN COM 668074305 981,791 44,172 4.71 44,103 17.89 0.0155
2013-08-09 2013-06-30 13F NORTHWESTERN COM 668074305 937,619 937,619 37,411 0.0136
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.