MDU Resources Group, Inc.
MX ˙ BMV ˙ US5526901096
SecurityMX:MDU / MDU Resources Group, Inc.
InstitutionAdvisors Asset Management, Inc.
Latest Disclosed Ownership278,403 shares
Latest Disclosed Value $ 5,768,510
Advisors Asset Management, Inc. reports 8.98% increase in ownership of MDU / MDU Resources Group, Inc.

On May 15, 2026 - Advisors Asset Management, Inc. filed a 13F-HR form disclosing ownership of 278,403 shares of MDU Resources Group, Inc. (MX:MDU) valued at $5,768,510 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 255,474 shares of MDU Resources Group, Inc.. This represents a change in shares of 8.98% 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.

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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 MDU RES GROUP COM 552690109 278,403 22,929 8.98 5,769 15.68 0.0958
2026-02-12 2025-12-31 13F MDU RES GROUP COM 552690109 255,474 30,064 13.34 4,987 24.22 0.0837
2025-11-06 2025-09-30 13F MDU RES GROUP COM 552690109 225,410 11,725 5.49 4,015 12.69 0.0681
2025-08-12 2025-06-30 13F MDU RES GROUP COM 552690109 213,685 24,175 12.76 3,562 11.17 0.0638
2025-05-15 2025-03-31 13F MDU RES GROUP COM 552690109 189,510 -88,809 -31.91 3,205 -36.11 0.0602
2025-02-10 2024-12-31 13F MDU RES GROUP COM 552690109 278,319 44,587 19.08 5,015 -21.71 0.0924
2024-11-08 2024-09-30 13F MDU RES GROUP COM 552690109 233,732 6,165 2.71 6,407 12.17 0.1177
2024-08-14 2024-06-30 13F MDU RES GROUP COM 552690109 227,567 21,804 10.60 5,712 10.14 0.1114
2024-05-14 2024-03-31 13F MDU RES GROUP COM 552690109 205,763 34,859 20.40 5,185 53.27 0.0997
2024-02-14 2023-12-31 13F MDU RES GROUP COM 552690109 170,904 88,763 108.06 3,384 110.39 0.0691
2023-11-14 2023-09-30 13F MDU RES GROUP COM 552690109 82,141 8,994 12.30 1,608 5.03 0.0347
2023-08-14 2023-06-30 13F MDU RES GROUP COM 552690109 73,147 -615 -0.83 1,532 -31.90 0.0313
2023-05-12 2023-03-31 13F MDU RES GROUP COM 552690109 73,762 9,786 15.30 2,248 15.82 0.0457
2023-02-13 2022-12-31 13F MDU RES GROUP COM 552690109 63,976 -30,653 -32.39 1,941 -25.00 0.0400
2022-11-08 2022-09-30 13F MDU RESOURCES COM 552690109 94,629 1,238 1.33 2,588 2.66 0.0544
2022-08-08 2022-06-30 13F MDU RES GROUP COM 552690109 93,391 -8,298 -8.16 2,521 -6.97 0.0478
2022-05-17 2022-03-31 13F MDU RES GROUP COM 552690109 101,689 2,523 2.54 2,710 -11.38 0.0417
2022-02-15 2021-12-31 13F MDU RESOURCES COM 552690109 99,166 3,003 3.12 3,058 7.19 0.0437
2021-11-12 2021-09-30 13F MDU RES GROUP COM 552690109 96,163 1,848 1.96 2,853 -3.48 0.0434
2021-07-30 2021-06-30 13F MDU RES GROUP COM 552690109 94,315 17,054 22.07 2,956 21.05 0.0436
2021-05-07 2021-03-31 13F MDU RES GROUP COM 552690109 77,261 12,499 19.30 2,442 43.14 0.0380
2021-02-12 2020-12-31 13F MDU RES GROUP COM 552690109 64,762 21,982 51.38 1,706 77.15 0.0282
2020-11-16 2020-09-30 13F MDU RES GROUP COM 552690109 42,780 3,308 8.38 963 10.06 0.0178
2020-08-12 2020-06-30 13F MDU RES GROUP COM 552690109 39,472 -12,928 -24.67 875 -22.36 0.0170
2020-05-15 2020-03-31 13F MDU RES GROUP COM 552690109 52,400 -26,056 -33.21 1,127 -51.65 0.0268
2020-05-20 2019-12-31 13F/A-1 MDU RES GROUP COM 552690109 78,456 -15,066 -16.11 2,331 -11.57 0.0409
2020-02-14 2019-12-31 13F MDU RES GROUP COM 552690109 78,456 -15,066 2,331 20,631.5539
2019-11-14 2019-09-30 13F MDU RES GROUP COM 552690109 93,522 -8,505 -8.34 2,636 0.15 0.0485
2019-11-14 2019-06-30 13F/A-1 MDU RESOURCES COM 552690109 102,027 18,306 21.87 2,632 21.68 0.0475
2019-08-14 2019-06-30 13F MDU RES GROUP COM 552690109 102,027 18,306 2,632
2019-05-15 2019-03-31 13F MDU RESOURCES COM 552690109 83,721 -1,857 -2.17 2,163 6.03 0.0385
2019-02-06 2018-12-31 13F/A-1 MDU RES GROUP COM 552690109 85,578 -43,471 -33.69 2,040 -38.46 0.0411
2019-01-31 2018-12-31 13F MDU RES GROUP COM 552690109 85,578 -43,471 2,040
2018-11-15 2018-09-30 13F MDU RES GROUP COM 552690109 129,049 -1,672 -1.28 3,315 -11.58 0.0542
2018-08-22 2018-06-30 13F/A-1 MDU RES GROUP COM 552690109 130,721 -684 -0.52 3,749 8.51 0.0637
2018-08-15 2018-06-30 13F MDU RES GROUP COM 552690109 4,902 -126,503 3,749
2018-05-15 2018-03-31 13F MDU RES GROUP COM 552690109 131,405 10,946 9.09 3,455 6.70 0.0579
2018-02-13 2017-12-31 13F MDU RES GROUP COM 552690109 120,459 9,439 8.50 3,238 12.39 0.0532
2017-11-07 2017-09-30 13F MDU RES GROUP COM 552690109 111,020 10,281 10.21 2,881 9.17 0.0483
2017-08-02 2017-06-30 13F MDU RES GROUP COM 552690109 100,739 9,383 10.27 2,639 5.56 0.0441
2017-05-02 2017-03-31 13F MDU RES GROUP COM 552690109 91,356 13,004 16.60 2,500 25.44 0.0419
2016-10-31 2016-09-30 13F MDU RES GROUP COM 552690109 78,352 -25,389 -24.47 1,993 -19.96 0.0327
2016-08-08 2016-06-30 13F MDU RES GROUP COM 552690109 103,741 -29,254 -22.00 2,490 -3.79 0.0404
2016-05-16 2016-03-31 13F MDU RES GROUP COM 552690109 132,995 -36,643 -21.60 2,588 -16.73 0.0431
2016-02-10 2015-12-31 13F MDU RES GROUP COM 552690109 169,638 -37,380 -18.06 3,108 -12.72 0.0493
2015-11-16 2015-09-30 13F MDU RES GROUP COM 552690109 207,018 -52,022 -20.08 3,561 -29.61 0.0568
2015-08-11 2015-06-30 13F MDU RES GROUP COM 552690109 259,040 -4,591 -1.74 5,059 -10.08 0.0694
2015-05-13 2015-03-31 13F MDU RES GROUP COM 552690109 263,631 52,350 24.78 5,626 13.31 0.0749
2015-02-05 2014-12-31 13F MDU RES GROUP COM 552690109 211,281 30,181 16.67 4,965 -1.41 0.0666
2014-11-13 2014-09-30 13F MDU RES GROUP COM 552690109 181,100 36,236 25.01 5,036 -0.96 0.0695
2014-08-14 2014-06-30 13F MDU RES GROUP COM 552690109 144,864 44,258 43.99 5,085 47.31 0.0705
2014-05-15 2014-03-31 13F MDU RES GROUP COM 552690109 100,606 40,096 66.26 3,452 86.70 0.0523
2014-02-03 2013-12-31 13F MDU RES GROUP COM 552690109 60,510 49,342 441.82 1,849 492.63 0.0298
2013-11-15 2013-09-30 13F MDU RES GROUP COM 552690109 11,168 5,093 83.84 312 98.73 0.0055
2013-08-14 2013-06-30 13F MDU RES GROUP COM 552690109 6,075 6,075 157 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.