NorthWestern Energy Group, Inc.
US ˙ NasdaqGS ˙ US6680743050

SecurityNWE / NorthWestern Energy Group, Inc.
InstitutionAlliancebernstein L.p.
Latest Disclosed Ownership816,313 shares
Latest Disclosed Value $ 52,684,841
Alliancebernstein L.p. reports 5.18% increase in ownership of NWE / NorthWestern Energy Group, Inc.

On May 15, 2026 - Alliancebernstein L.p. filed a 13F-HR form disclosing ownership of 816,313 shares of NorthWestern Energy Group, Inc. (US:NWE) valued at $53,827,679 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 776,126 shares of NorthWestern Energy Group, Inc.. This represents a change in shares of 5.18% during the quarter. The current value of the position is $56,823,548 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.

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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)
2026-05-15 2026-03-31 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 816,313 40,187 5.18 52,685 5.18 0.0171
2026-02-17 2025-12-31 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 776,126 574,359 284.66 50,091 323.60 0.0158
2025-11-14 2025-09-30 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 201,767 83,541 70.66 11,826 95.00 0.0037
2025-08-14 2025-06-30 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 118,226 -8,989 -7.07 6,065 -17.62 0.0020
2025-05-15 2025-03-31 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 127,215 6,427 5.32 7,362 14.00 0.0027
2025-02-12 2024-12-31 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 120,788 -994 -0.82 6,457 -7.33 0.0022
2024-11-14 2024-09-30 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 121,782 -2,139 -1.73 6,968 12.30 0.0023
2024-08-14 2024-06-30 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 123,921 407 0.33 6,206 -1.35 0.0022
2024-05-14 2024-03-31 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 123,514 -4,900 -3.82 6,291 -3.73 0.0022
2024-02-14 2023-12-31 13F NORTHWESTERN ENERGY GROUP IN COM NEW 668074305 128,414 -1,930 -1.48 6,535 4.31 0.0025
2023-11-14 2023-09-30 13F NORTHWESTERN COM NEW 668074305 130,344 -64,029 -32.94 6,264 -43.22 0.0027
2023-08-15 2023-06-30 13F NORTHWESTERN COM NEW 668074305 194,373 3,442 1.80 11,033 -0.14 0.0045
2023-05-15 2023-03-31 13F NORTHWESTERN COM NEW 668074305 190,931 -2,004 -1.04 11,047 -3.50 0.0047
2023-02-15 2022-12-31 13F NORTHWESTERN COM NEW 668074305 192,935 12,355 6.84 11,449 28.64 0.0052
2022-11-15 2022-09-30 13F NORTHWESTERN COM NEW 668074305 180,580 -5,677 -3.05 8,899 -18.92 0.0043
2022-08-15 2022-06-30 13F NORTHWESTERN COM NEW 668074305 186,257 44,362 31.26 10,976 27.88 0.0050
2022-05-13 2022-03-31 13F NORTHWESTERN COM NEW 668074305 141,895 -3,201 -2.21 8,583 3.48 0.0033
2022-02-14 2021-12-31 13F NORTHWESTERN COM NEW 668074305 145,096 865 0.60 8,294 0.36 0.0029
2021-11-10 2021-09-30 13F NORTHWESTERN COM NEW 668074305 144,231 -1,268 -0.87 8,264 -5.68 0.0033
2021-07-30 2021-06-30 13F NORTHWESTERN COM NEW 668074305 145,499 4,124 2.92 8,762 -4.95 0.0035
2021-05-06 2021-03-31 13F NORTHWESTERN COM NEW 668074305 141,375 -14,606 -9.36 9,218 1.35 0.0040
2021-02-08 2020-12-31 13F NORTHWESTERN COM NEW 668074305 155,981 -450 -0.29 9,095 19.53 0.0043
2020-11-12 2020-09-30 13F NORTHWESTERN COM NEW 668074305 156,431 -13,449 -7.92 7,609 -17.85 0.0041
2020-08-13 2020-06-30 13F NORTHWESTERN COM NEW 668074305 169,880 13,513 8.64 9,262 -0.99 0.0054
2020-05-14 2020-03-31 13F NORTHWESTERN COM NEW 668074305 156,367 -16,740 -9.67 9,355 -24.60 0.0067
2020-02-18 2019-12-31 13F NORTHWESTERN COM NEW 668074305 173,107 20,968 13.78 12,407 8.66 0.0071
2019-11-14 2019-09-30 13F NORTHWESTERN COM NEW 668074305 152,139 -668 -0.44 11,418 3.56 0.0071
2019-08-14 2019-06-30 13F NORTHWESTERN COM NEW 668074305 152,807 3,874 2.60 11,025 5.14 0.0068
2019-05-14 2019-03-31 13F NORTHWESTERN COM NEW 668074305 148,933 -112 -0.08 10,486 18.37 0.0068
2019-02-13 2018-12-31 13F NORTHWESTERN COM NEW 668074305 149,045 57,122 62.14 8,859 64.30 0.0066
2018-11-08 2018-09-30 13F NORTHWESTERN COM NEW 668074305 91,923 27 0.03 5,392 2.49 0.0035
2018-08-13 2018-06-30 13F NORTHWESTERN COM NEW 668074305 91,896 2,087 2.32 5,261 8.88 0.0037
2018-05-14 2018-03-31 13F NORTHWESTERN COM NEW 668074305 89,809 499 0.56 4,832 -9.38 0.0035
2018-02-13 2017-12-31 13F NORTHWESTERN COM NEW 668074305 89,310 -25,385 -22.13 5,332 -18.36 0.0038
2017-11-13 2017-09-30 13F NORTHWESTERN COM NEW 668074305 114,695 -819,298 -87.72 6,531 -88.54 0.0049
2017-08-10 2017-06-30 13F NORTHWESTERN COM NEW 668074305 933,993 866,081 1,275.30 56,992 1,329.80 0.0441
2017-05-11 2017-03-31 13F NORTHWESTERN COM NEW 668074305 67,912 -4,952 -6.80 3,986 -3.81 0.0032
2017-02-13 2016-12-31 13F NORTHWESTERN COM NEW 668074305 72,864 -50 -0.07 4,144 -1.22 0.0035
2016-11-10 2016-09-30 13F NORTHWESTERN COM NEW 668074305 72,914 2,112 2.98 4,195 -6.05 0.0035
2016-08-11 2016-06-30 13F NORTHWESTERN COM NEW 668074305 70,802 4,700 7.11 4,465 9.38 0.0038
2016-05-13 2016-03-31 13F NORTHWESTERN COM NEW 668074305 66,102 -4,100 -5.84 4,082 7.20 0.0035
2016-02-16 2015-12-31 13F/A-1 NORTHWESTERN COM NEW 668074305 70,202 -1,400 -1.96 3,808 -1.19 0.0032
2016-02-12 2015-12-31 13F NORTHWESTERN COM NEW 668074305 70,202 3,779
2015-11-13 2015-09-30 13F NORTHWESTERN COM NEW 668074305 71,602 -100 -0.14 3,854 10.27 0.0033
2015-08-14 2015-06-30 13F NORTHWESTERN COM NEW 668074305 71,702 0 0.00 3,495 -9.39 0.0029
2015-05-13 2015-03-31 13F NORTHWESTERN COM NEW 668074305 71,702 10,000 16.21 3,857 10.48 0.0031
2015-02-13 2014-12-31 13F NORTHWESTERN COM NEW 668074305 61,702 400 0.65 3,491 25.53 0.0029
2014-11-13 2014-09-30 13F NORTHWESTERN COM NEW 668074305 61,302 0 0.00 2,781 -13.07 0.0023
2014-08-13 2014-06-30 13F NORTHWESTERN COM NEW 668074305 61,302 -6,105 -9.06 3,199 0.06 0.0027
2014-05-13 2014-03-31 13F NORTHWESTERN COM NEW 668074305 67,407 -1,295 -1.88 3,197 7.43 0.0028
2014-02-13 2013-12-31 13F NORTHWESTERN COM NEW 668074305 68,702 -2,890 -4.04 2,976 -7.46 0.0027
2013-11-14 2013-09-30 13F NORTHWESTERN COM NEW 668074305 71,592 590 0.83 3,216 13.52 0.0032
2013-08-13 2013-06-30 13F NORTHWESTERN COM NEW 668074305 71,002 71,002 2,833 0.0030
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.