MDU Resources Group, Inc.
MX ˙ BMV ˙ US5526901096
SecurityMX:MDU / MDU Resources Group, Inc.
InstitutionArizona State Retirement System
Latest Disclosed Ownership53,332 shares
Latest Disclosed Value $ 1,105,039
Arizona State Retirement System reports 1.74% decrease in ownership of MDU / MDU Resources Group, Inc.

On May 1, 2026 - Arizona State Retirement System filed a 13F-HR form disclosing ownership of 53,332 shares of MDU Resources Group, Inc. (MX:MDU) valued at $1,105,039 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 54,274 shares of MDU Resources Group, Inc.. This represents a change in shares of -1.74% 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)
2026-05-01 2026-03-31 13F MDU RES GROUP COM 552690109 53,332 -942 -1.74 1,105 4.34 0.0065
2026-01-28 2025-12-31 13F MDU RES GROUP COM 552690109 54,274 -3,166 -5.51 1,059 3.52 0.0058
2025-11-03 2025-09-30 13F MDU RES GROUP COM 552690109 57,440 790 1.39 1,023 8.37 0.0055
2025-08-13 2025-06-30 13F MDU RES GROUP COM 552690109 56,650 1,090 1.96 944 0.53 0.0054
2025-05-01 2025-03-31 13F MDU RES GROUP COM 552690109 55,560 -654 -1.16 940 -7.21 0.0060
2025-02-06 2024-12-31 13F MDU RES GROUP COM 552690109 56,214 441 0.79 1,013 -33.77 0.0062
2024-11-12 2024-09-30 13F MDU RES GROUP COM 552690109 55,773 1,600 2.95 1,529 12.44 0.0096
2024-08-05 2024-06-30 13F MDU RES GROUP COM 552690109 54,173 1,010 1.90 1,360 1.49 0.0091
2024-05-07 2024-03-31 13F MDU RES GROUP COM 552690109 53,163 -913 -1.69 1,340 25.14 0.0093
2024-01-24 2023-12-31 13F MDU RES GROUP COM 552690109 54,076 -1,003 -1.82 1,071 -0.74 0.0081
2023-11-07 2023-09-30 13F MDU RES GROUP COM 552690109 55,079 745 1.37 1,078 -5.19 0.0092
2023-08-01 2023-06-30 13F MDU RES GROUP COM 552690109 54,334 -4,587 -7.79 1,138 -36.66 0.0092
2023-04-27 2023-03-31 13F MDU RESOURCES GROUP COM 552690109 58,921 1,540 2.68 1,796 3.16 0.0161
2023-02-08 2022-12-31 13F MDU RESOURCES GROUP COM 552690109 57,381 2,121 3.84 1,741 15.16 0.0168
2022-11-07 2022-09-30 13F MDU RES GROUP COM 552690109 55,260 152 0.28 1,511 1.61 0.0156
2022-07-28 2022-06-30 13F MDU RES GROUP COM 552690109 55,108 139 0.25 1,487 1.50 0.0144
2022-05-04 2022-03-31 13F MDU RES GROUP COM 552690109 54,969 485 0.89 1,465 -12.80 0.0118
2022-02-04 2021-12-31 13F MDU RES GROUP COM 552690109 54,484 -320 -0.58 1,680 3.32 0.0128
2021-11-12 2021-09-30 13F MDU RESOURCES GROUP COM 552690109 54,804 297 0.54 1,626 -4.80 0.0133
2021-08-02 2021-06-30 13F MDU RESOURCES GROUP COM 552690109 54,507 -3,865 -6.62 1,708 -7.43 0.0139
2021-05-06 2021-03-31 13F MDU RESOURCES GROUP COM 552690109 58,372 220 0.38 1,845 20.43 0.0161
2021-01-28 2020-12-31 13F MDU RESOURCES GROUP COM 552690109 58,152 -2,351 -3.89 1,532 12.56 0.0139
2020-11-05 2020-09-30 13F MDU RESOURCES GROUP COM 552690109 60,503 15,274 33.77 1,361 35.69 0.0135
2020-08-04 2020-06-30 13F MDU RESOURCES GROUP COM 552690109 45,229 -1,814 -3.86 1,003 -0.79 0.0141
2020-05-05 2020-03-31 13F MDU RESOURCES GROUP COM 552690109 47,043 -66,589 -58.60 1,011 -70.05 0.0174
2020-01-27 2019-12-31 13F MDU RESOURCES GROUP COM 552690109 113,632 -10,428 -8.41 3,376 -3.46 0.0407
2019-10-31 2019-09-30 13F MDU RESOURCES GROUP COM 552690109 124,060 -19,704 -13.71 3,497 -5.72 0.0427
2019-07-25 2019-06-30 13F MDU RESOURCES GROUP COM 552690109 143,764 2,958 2.10 3,709 1.98 0.0429
2019-04-29 2019-03-31 13F MDU RESOURCES GROUP COM 552690109 140,806 116 0.08 3,637 8.44 0.0433
2019-01-28 2018-12-31 13F MDU RESOURCES GROUP COM 552690109 140,690 1,508 1.08 3,354 -6.21 0.0432
2018-10-29 2018-09-30 13F MDU RESOURCES GROUP COM 552690109 139,182 3,587 2.65 3,576 -8.05 0.0337
2018-08-07 2018-06-30 13F MDU RESOURCES GROUP COM 552690109 135,595 3,520 2.67 3,889 4.57 0.0391
2018-05-14 2018-03-31 13F MDU RESOURCES GROUP COM 552690109 132,075 -8,500 -6.05 3,719 -1.59 0.0375
2018-02-09 2017-12-31 13F MDU RESOURCES GROUP COM 552690109 140,575 29,852 26.96 3,779 31.53 0.0368
2017-11-14 2017-09-30 13F MDU RESOURCES GROUP COM 552690109 110,723 28,423 34.54 2,873 33.26 0.0343
2017-08-02 2017-06-30 13F MDU RESOURCES GROUP COM 552690109 82,300 1,100 1.35 2,156 -2.97 0.0299
2017-05-10 2017-03-31 13F MDU RESOURCES GROUP COM 552690109 81,200 5,800 7.69 2,222 2.44 0.0312
2017-02-10 2016-12-31 13F MDU RESOURCES GROUP COM 552690109 75,400 -890 -1.17 2,169 11.75 0.0319
2016-11-01 2016-09-30 13F MDU RESOURCES GROUP COM 552690109 76,290 0 0.00 1,941 6.01 0.0295
2016-08-15 2016-06-30 13F MDU RESOURCES GROUP COM 552690109 76,290 -16,600 -17.87 1,831 1.27 0.0257
2016-05-16 2016-03-31 13F MDU RESOURCES GROUP COM 552690109 92,890 200 0.22 1,808 6.48 0.0235
2016-02-12 2015-12-31 13F MDU RESOURCES GROUP COM 552690109 92,690 -17,288 -15.72 1,698 -10.25 0.0226
2015-11-20 2015-09-30 13F MDU RESOURCES GROUP COM 552690109 109,978 -47,206 -30.03 1,892 -48.77 0.0265
2015-02-11 2014-12-31 13F MDU RESOURCES GROUP COM 552690109 157,184 8,500 5.72 3,693 -10.67 0.0435
2014-11-21 2014-09-30 13F MDU RESOURCES GROUP COM 552690109 148,684 -2,500 -1.65 4,134 -22.09 0.0513
2014-08-07 2014-06-30 13F MDU RESOURCES GROUP COM 552690109 151,184 2,100 1.41 5,306 3.73 0.0642
2014-05-19 2014-03-31 13F MDU RESOURCES GROUP COM 552690109 149,084 -14,800 -9.03 5,115 2.18 0.0648
2014-02-05 2013-12-31 13F MDU RESOURCES GROUP COM 552690109 163,884 -10,100 -5.81 5,006 2.88 0.0616
2013-11-01 2013-09-30 13F MDU RESOURCES GROUP COM 552690109 173,984 400 0.23 4,866 8.21 0.0623
2013-09-17 2013-06-30 13F MDU RESOURCES GROUP COM 552690109 173,584 -5,800 -3.23 4,497 0.33 0.0613
2013-09-17 2013-03-31 13F MDU RESOURCES GROUP COM 552690109 179,384 179,384 4,482 0.0642
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.