MDU 資源集團公司
MX ˙ BMV ˙ US5526901096
SecurityMX:MDU / MDU Resources Group, Inc.
InstitutionComerica Bank
Latest Disclosed Ownership243,107 shares
Latest Disclosed Value $ 4,745,449
Comerica Bank reports 22.29% increase in ownership of MDU / MDU Resources Group, Inc.

On January 29, 2026 - Comerica Bank filed a 13F-HR form disclosing ownership of 243,107 shares of MDU Resources Group, Inc. (MX:MDU) valued at $4,745,449 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 14, 2025 disclosing 198,791 shares of MDU Resources Group, Inc.. This represents a change in shares of 22.29% 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)
2026-01-29 2025-12-31 13F MDU RES GROUP COM 552690109 243,107 44,316 22.29 4,745 34.04 0.0189
2025-11-14 2025-09-30 13F MDU RES GROUP COM 552690109 198,791 70,646 55.13 3,540 65.73 0.0133
2025-08-14 2025-06-30 13F MDU RES GROUP COM 552690109 128,145 16,645 14.93 2,136 13.32 0.0083
2025-05-14 2025-03-31 13F MDU RES GROUP COM 552690109 111,500 1,132 1.03 1,885 -5.18 0.0079
2025-02-14 2024-12-31 13F/A-1 MDU RES GROUP COM 552690109 110,368 34,384 45.25 1,989 -4.51 0.0080
2025-02-14 2024-12-31 13F MDU RES GROUP COM 552690109 110,368 34,384 1,989 0.0067
2024-11-14 2024-09-30 13F MDU RES GROUP COM 552690109 75,984 -10,748 -12.39 2,083 -4.32 0.0082
2024-08-15 2024-06-30 13F MDU RESOURCES GROUP COMMON 552690109 86,732 -6,220 -6.69 2,177 -7.09 0.0091
2024-05-16 2024-03-31 13F MDU RESOURCES GROUP COMMON 552690109 92,952 -57,562 -38.24 2,342 -21.41 0.0101
2024-02-14 2023-12-31 13F MDU RESOURCES GROUP COMMON 552690109 150,514 -1,925 -1.26 2,980 -0.13 0.0137
2023-11-21 2023-09-30 13F MDU RES GROUP COMMON 552690109 152,439 152,439 2,985 0.0155
2023-08-22 2023-06-30 13F MDU RESOURCES GROUP COM 552690109 0 -143,780 -100.00 0 -100.00
2023-01-26 2022-12-31 13F MDU RESOURCES GROUP COM 552690109 143,780 -2,210 -1.51 4 -99.90 0.0343
2022-10-28 2022-09-30 13F MDU RESOURCES GROUP COM 552690109 145,990 -1,577 -1.07 4,003 0.40 0.0337
2022-08-02 2022-06-30 13F MDU RESOURCES GROUP COM 552690109 147,567 45,566 44.67 3,987 39.36 0.0327
2022-04-27 2022-03-31 13F MDU RESOURCES GROUP COM 552690109 102,001 549 0.54 2,861 -2.82 0.0208
2022-02-18 2021-12-31 13F MDU RESOURCES GROUP COM 552690109 101,452 3,442 3.51 2,944 -3.70 0.0217
2021-11-22 2021-09-30 13F MDU RESOURCES GROUP COM 552690109 98,010 -14,346 -12.77 3,057 -15.15 0.0184
2021-08-26 2021-06-30 13F MDU RESOURCES GROUP COM 552690109 112,356 -2,206 -1.93 3,603 -5.95 0.0215
2021-04-28 2021-03-31 13F MDU RESOURCES GROUP COM 552690109 114,562 -5,852 -4.86 3,831 14.73 0.0228
2021-01-28 2020-12-31 13F MDU RESOURCES GROUP COM 552690109 120,414 -4,030 -3.24 3,339 8.34 0.0212
2020-10-30 2020-09-30 13F MDU RESOURCES GROUP COM 552690109 124,444 -1,519 -1.21 3,082 11.51 0.0224
2020-07-31 2020-06-30 13F MDU RESOURCES GROUP COM 552690109 125,963 8,343 7.09 2,764 5.54 0.0213
2020-05-01 2020-03-31 13F MDU RESOURCES GROUP COM 552690109 117,620 -129 -0.11 2,619 -25.79 0.0240
2020-02-07 2019-12-31 13F MDU RESOURCES GROUP COM 552690109 117,749 1,869 1.61 3,529 8.48 0.0267
2019-10-31 2019-09-30 13F MDU RESOURCES GROUP COM 552690109 115,880 -82 -0.07 3,253 7.32 0.0257
2019-08-02 2019-06-30 13F MDU RESOURCES GROUP COM 552690109 115,962 -11,531 -9.04 3,031 -7.28 0.0243
2019-05-02 2019-03-31 13F MDU RESOURCES GROUP COM 552690109 127,493 -2,811 -2.16 3,269 0.00 0.0265
2019-02-06 2018-12-31 13F MDU RESOURCES GROUP COM 552690109 130,304 3,074 2.42 3,269 -0.79 0.0278
2018-11-01 2018-09-30 13F MDU RESOURCES GROUP COM 552690109 127,230 -23,710 -15.71 3,295 -25.23 0.0266
2018-08-01 2018-06-30 13F MDU RESOURCES GROUP COM 552690109 150,940 -4,817 -3.09 4,407 1.97 0.0308
2018-05-01 2018-03-31 13F MDU RESOURCES GROUP COM 552690109 155,757 -178 -0.11 4,322 5.06 0.0309
2018-02-02 2017-12-31 13F MDU RESOURCES GROUP COM 552690109 155,935 953 0.61 4,114 -2.19 0.0274
2017-11-06 2017-09-30 13F MDU RESOURCES GROUP COM 552690109 154,982 144 0.09 4,206 6.00 0.0304
2017-08-03 2017-06-30 13F MDU RESOURCES GROUP COM 552690109 154,838 1,032 0.67 3,968 -4.87 0.0297
2017-05-03 2017-03-31 13F MDU RESOURCES GROUP COM 552690109 153,806 6,445 4.37 4,171 -2.07 0.0317
2017-02-08 2016-12-31 13F MDU RESOURCES GROUP COM 552690109 147,361 9,722 7.06 4,259 32.64 0.0337
2016-08-11 2016-06-30 13F MDU RESOURCES GROUP COM 552690109 137,639 3,778 2.82 3,211 21.40 0.0277
2016-05-11 2016-03-31 13F MDU RESOURCES GROUP COM 552690109 133,861 -3,703 -2.69 2,645 9.89 0.0236
2016-02-05 2015-12-31 13F MDU RESOURCES GROUP COM 552690109 137,564 459 0.33 2,407 2.08 0.0236
2015-11-12 2015-09-30 13F MDU RESOURCES GROUP COM 552690109 137,105 -135,909 -49.78 2,358 -55.78 0.0223
2015-08-13 2015-06-30 13F MDU RESOURCES GROUP COM 552690109 273,014 136,447 99.91 5,332 82.98 0.0229
2015-05-15 2015-03-31 13F MDU RESOURCES GROUP COM 552690109 136,567 -137,553 -50.18 2,914 -54.77 0.0247
2015-02-13 2014-12-31 13F MDU RESOURCES GROUP COM 552690109 274,120 132,881 94.08 6,442 64.00 0.0279
2014-10-21 2014-09-30 13F MDU RESOURCES GROUP COM 552690109 141,239 3,601 2.62 3,928 -18.69 0.0347
2014-08-12 2014-06-30 13F MDU RESOURCES GROUP COM 552690109 137,638 -13,669 -9.03 4,831 -6.94 0.0411
2014-05-15 2014-03-31 13F MDU RESOURCES GROUP COM 552690109 151,307 2,357 1.58 5,191 14.09 0.0398
2014-02-11 2013-12-31 13F MDU RESOURCES GROUP COM 552690109 148,950 -4,155 -2.71 4,550 6.26 0.0353
2013-11-12 2013-09-30 13F MDU RESOURCES GROUP COM 552690109 153,105 5,203 3.52 4,282 11.74 0.0298
2013-08-13 2013-06-30 13F/A-1 MDU RESOURCES GROUP COM 552690109 147,902 147,902 3,832 0.0312
2013-08-08 2013-06-30 13F MDU RESOURCES GROUP COM 552690109 878,932 22,772
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.