MDU Resources Group, Inc.
US ˙ NYSE ˙ US5526901096

SecurityMDU / MDU Resources Group, Inc.
InstitutionMan Group plc
Latest Disclosed Ownership378,425 shares
Latest Disclosed Value $ 7,840,966
Man Group plc reports 72.76% increase in ownership of MDU / MDU Resources Group, Inc.

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 378,425 shares of MDU Resources Group, Inc. (US:MDU) valued at $7,840,966 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 219,052 shares of MDU Resources Group, Inc.. This represents a change in shares of 72.76% during the quarter. The current value of the position is $7,856,103 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 MDU RES GROUP COM 552690109 378,425 159,373 72.76 7,841 83.39 0.0142
2026-02-17 2025-12-31 13F MDU RES GROUP COM 552690109 219,052 107,713 96.74 4,276 115.69 0.0073
2025-11-14 2025-09-30 13F MDU RES GROUP COM 552690109 111,339 36,282 48.34 1,983 58.43 0.0034
2025-08-14 2025-06-30 13F MDU RES GROUP COM 552690109 75,057 -385,083 -83.69 1,251 -83.92 0.0024
2025-05-15 2025-03-31 13F MDU RES GROUP COM 552690109 460,140 460,140 7,781 0.0197
2024-11-14 2024-09-30 13F MDU RES GROUP COM 552690109 0 -95,656 -100.00 0 -100.00
2024-08-14 2024-06-30 13F MDU RES GROUP COM 552690109 95,656 -320,331 -77.01 2,401 -77.10 0.0061
2024-05-15 2024-03-31 13F MDU RES GROUP COM 552690109 415,987 -187,965 -31.12 10,483 -12.34 0.0264
2024-02-14 2023-12-31 13F MDU RES GROUP COM 552690109 603,952 11,958 35.75 0.0333
2023-11-14 2023-09-30 13F MDU RES GROUP COM 552690109 8,809 673.40 0.0273
2023-08-14 2023-06-30 13F MDU RES GROUP COM 552690109 54,421 1,140 71.02 0.0035
2023-05-15 2023-03-31 13F MDU RES GROUP COM 552690109 667 0.0024
2023-02-14 2022-12-31 13F MDU RES GROUP COM 552690109 0 -40,515 -100.00 0 -100.00
2022-11-14 2022-09-30 13F MDU RES GROUP COM 552690109 40,515 1,108 21.23 0.0051
2022-08-15 2022-06-30 13F MDU RES GROUP COM 552690109 914 -54.75 0.0039
2022-05-16 2022-03-31 13F MDU RES GROUP COM 552690109 75,798 -558,527 -88.05 2,020 -89.67 0.0070
2022-02-14 2021-12-31 13F MDU RES GROUP COM 552690109 634,325 -61,709 -8.87 19,562 -5.28 0.0629
2021-11-15 2021-09-30 13F MDU RES GROUP COM 552690109 696,034 -13,846 -1.95 20,652 -7.17 0.0724
2021-08-16 2021-06-30 13F MDU RES GROUP COM 552690109 709,880 -1,358 -0.19 22,248 -1.04 0.0783
2021-05-17 2021-03-31 13F MDU RES GROUP COM 552690109 711,238 -242,160 -25.40 22,482 -10.47 0.0989
2021-02-16 2020-12-31 13F MDU RES GROUP COM 552690109 953,398 -265,922 -21.81 25,112 -8.47 0.1103
2020-11-16 2020-09-30 13F MDU RES GROUP COM 552690109 1,219,320 254,628 26.39 27,435 28.22 0.1079
2020-08-14 2020-06-30 13F MDU RES GROUP COM 552690109 964,692 -307,025 -24.14 21,397 -21.74 0.1079
2020-05-15 2020-03-31 13F MDU RES GROUP COM 552690109 1,271,717 816,831 179.57 27,341 102.32 0.1771
2020-02-18 2019-12-31 13F MDU RES GROUP COM 552690109 454,886 353,425 348.34 13,514 372.68 0.0444
2019-11-14 2019-09-30 13F MDU RES GROUP COM 552690109 101,461 85,204 524.11 2,859 582.34 0.0106
2019-08-14 2019-06-30 13F MDU RES GROUP COM 552690109 16,257 -333,677 -95.35 419 -95.36 0.0015
2019-05-15 2019-03-31 13F MDU RES GROUP COM 552690109 349,934 -131,389 -27.30 9,039 -21.22 0.0343
2019-02-14 2018-12-31 13F MDU RES GROUP COM 552690109 481,323 226,860 89.15 11,474 75.52 0.0511
2018-11-14 2018-09-30 13F MDU RES GROUP COM 552690109 254,463 84,446 49.67 6,537 34.06 0.0239
2018-08-14 2018-06-30 13F MDU RES GROUP COM 552690109 170,017 -201,705 -54.26 4,876 -53.42 0.0201
2018-05-15 2018-03-31 13F MDU RES GROUP COM 552690109 371,722 371,722 10,468 0.0479
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.