MDU Resources Group, Inc.
MX ˙ BMV ˙ US5526901096
SecurityMX:MDU / MDU Resources Group, Inc.
InstitutionNorthwestern Mutual Wealth Management Co
Latest Disclosed Ownership3,939 shares
Latest Disclosed Value $ 81,618
Northwestern Mutual Wealth Management Co reports 5.63% increase in ownership of MDU / MDU Resources Group, Inc.

On May 7, 2026 - Northwestern Mutual Wealth Management Co filed a 13F-HR form disclosing ownership of 3,939 shares of MDU Resources Group, Inc. (MX:MDU) valued at $81,618 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on February 10, 2026 disclosing 3,729 shares of MDU Resources Group, Inc.. This represents a change in shares of 5.63% during the quarter.

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)
2026-05-07 2026-03-31 13F MDU RES GROUP COM 552690109 3,939 210 5.63 82 12.50 0.0001
2026-02-10 2025-12-31 13F/A-1 MDU RES GROUP COM 552690109 3,729 163 4.57 73 14.29 0.0000
2026-02-05 2025-12-31 13F MDU RES GROUP COM 552690109 16,302 12,736 8,454 0.0053
2025-11-14 2025-09-30 13F MDU RES GROUP COM 552690109 3,566 13 0.37 64 6.78 0.0000
2025-08-13 2025-06-30 13F MDU RES GROUP COM 552690109 3,553 -288 -7.50 59 -7.81 0.0000
2025-05-14 2025-03-31 13F MDU RES GROUP COM 552690109 3,841 -569 -12.90 65 -18.99 0.0001
2025-02-11 2024-12-31 13F MDU RES GROUP COM 552690109 4,410 2,040 86.08 79 23.44 0.0001
2024-11-12 2024-09-30 13F MDU RES GROUP COM 552690109 2,370 228 10.64 65 20.75 0.0001
2024-08-16 2024-06-30 13F MDU RES GROUP COM 552690109 2,142 413 23.89 54 23.26 0.0001
2024-05-15 2024-03-31 13F MDU RES GROUP COM 552690109 1,729 158 10.06 44 38.71 0.0000
2024-02-13 2023-12-31 13F MDU RES GROUP COM 552690109 1,571 0 0.00 31 3.33 0.0000
2023-11-14 2023-09-30 13F MDU RES GROUP COM 552690109 1,571 -278 -15.04 31 -21.05 0.0000
2023-08-14 2023-06-30 13F MDU RES GROUP COM 552690109 1,849 -1,997 -51.92 39 -67.52 0.0001
2023-05-15 2023-03-31 13F MDU RES GROUP COM 552690109 3,846 1,281 49.94 117 51.95 0.0002
2023-02-21 2022-12-31 13F MDU RES GROUP COM 552690109 2,565 -17 -0.66 78 8.45 0.0001
2022-11-14 2022-09-30 13F MDU RES GROUP COM 552690109 2,582 -306 -10.60 71 -8.97 0.0001
2022-08-04 2022-06-30 13F MDU RES GROUP COM 552690109 2,888 -813 -21.97 78 -21.21 0.0001
2022-05-09 2022-03-31 13F MDU RES GROUP COM 552690109 3,701 -9,814 -72.62 99 -76.32 0.0002
2022-02-03 2021-12-31 13F MDU RES GROUP COM 552690109 13,515 -503 -3.59 418 0.48 0.0007
2021-11-15 2021-09-30 13F MDU RES GROUP COM 552690109 14,018 -50 -0.36 416 -5.67 0.0008
2021-08-13 2021-06-30 13F MDU RES GROUP COM 552690109 14,068 8,881 171.22 441 168.90 0.0008
2021-05-14 2021-03-31 13F MDU RES GROUP COM 552690109 5,187 -37 -0.71 164 18.84 0.0003
2021-02-12 2020-12-31 13F MDU RES GROUP COM 552690109 5,224 1,104 26.80 138 48.39 0.0003
2020-11-13 2020-09-30 13F MDU RES GROUP COM 552690109 4,120 3 0.07 93 2.20 0.0003
2020-08-14 2020-06-30 13F MDU RES GROUP COM 552690109 4,117 -726 -14.99 91 -12.50 0.0003
2020-05-08 2020-03-31 13F MDU RES GROUP COM 552690109 4,843 233 5.05 104 -24.09 0.0004
2020-02-13 2019-12-31 13F MDU RES GROUP COM 552690109 4,610 -678 -12.82 137 -8.05 0.0005
2019-11-12 2019-09-30 13F MDU RES GROUP COM 552690109 5,288 559 11.82 149 22.13 0.0006
2019-08-12 2019-06-30 13F MDU RES GROUP COM 552690109 4,729 91 1.96 122 1.67 0.0005
2019-05-10 2019-03-31 13F MDU RES GROUP COM 552690109 4,638 -857 -15.60 120 -8.40 0.0005
2019-02-12 2018-12-31 13F MDU RES GROUP COM 552690109 5,495 4,366 386.71 131 351.72 0.0007
2018-11-01 2018-09-30 13F MDU RES GROUP COM 552690109 1,129 580 105.65 29 81.25 0.0001
2018-08-10 2018-06-30 13F MDU RES GROUP COM 552690109 549 325 145.09 16 166.67 0.0001
2018-05-14 2018-03-31 13F MDU RES GROUP COM 552690109 224 -1,261 -84.92 6 -85.00 0.0000
2018-01-31 2017-12-31 13F MDU RES GROUP COM 552690109 1,485 1,485 40 0.0003
2017-08-10 2017-06-30 13F MDU RES GROUP COM 552690109 0 -113 -100.00 0 -100.00
2017-05-09 2017-03-31 13F MDU RES GROUP COM 552690109 113 -245 -68.44 3 -72.73 0.0000
2017-02-15 2016-12-31 13F MDU RES GROUP COM 552690109 358 300 517.24 11 1,000.00 0.0001
2016-11-14 2016-09-30 13F MDU RES GROUP COM 552690109 58 0 0.00 1 0.00 0.0000
2016-08-29 2016-06-30 13F MDU RES GROUP COM 552690109 58 -96 -62.34 1 -66.67 0.0000
2016-05-16 2016-03-31 13F MDU RES GROUP COM 552690109 154 -566 -78.61 3 -76.92 0.0000
2016-02-16 2015-12-31 13F MDU RES GROUP COM 552690109 720 88 13.92 13 18.18 0.0003
2015-11-16 2015-09-30 13F MDU RES GROUP COM 552690109 632 632 0.00 11 0.0003
2015-02-13 2014-12-31 13F MDU RES GROUP COM 552690109 0 -10 -100.00 0 0.0000
2014-11-14 2014-09-30 13F MDU RES GROUP COM 552690109 10 -7,490 -99.87 0 -100.00
2014-05-15 2014-03-31 13F MDU RES GROUP COM 552690109 7,500 7,367 5,539.10 257 6,325.00 0.0107
2014-02-14 2013-12-31 13F MDU RES GROUP COM 552690109 133 133 -64.53 4 -60.00 0.0002
2013-11-14 2013-09-30 13F MDU RES GROUP COM 552690109 0 -375 -100.00 0 -100.00
2013-08-21 2013-06-30 13F/A-1 MDU RES GROUP COM 552690109 375 375 10 0.0006
2013-08-14 2013-06-30 13F MDU RES GROUP COM 552690109 73,980 1,917 0.0211
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.