MDU Resources Group, Inc.
MX ˙ BMV ˙ US5526901096
SecurityMX:MDU / MDU Resources Group, Inc.
InstitutionWinton Capital Group Ltd
Latest Disclosed Ownership50,262 shares
Latest Disclosed Value $ 1,041,429
Winton Capital Group Ltd reports 93.90% increase in ownership of MDU / MDU Resources Group, Inc.

On May 12, 2026 - Winton Capital Group Ltd filed a 13F-HR form disclosing ownership of 50,262 shares of MDU Resources Group, Inc. (MX:MDU) valued at $1,041,429 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 25,921 shares of MDU Resources Group, Inc.. This represents a change in shares of 93.90% 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)
2026-05-12 2026-03-31 13F MDU RES GROUP COM 552690109 50,262 24,341 93.90 1,041 106.14 0.0365
2026-02-11 2025-12-31 13F MDU RES GROUP COM 552690109 25,921 -11,884 -31.43 506 -24.96 0.0175
2025-11-13 2025-09-30 13F MDU RES GROUP COM 552690109 37,805 -27,207 -41.85 673 -37.86 0.0252
2025-08-14 2025-06-30 13F MDU RES GROUP COM 552690109 65,012 1,431 2.25 1,084 0.74 0.0554
2025-05-15 2025-03-31 13F MDU RES GROUP COM 552690109 63,581 5,522 9.51 1,075 2.77 0.0655
2025-02-12 2024-12-31 13F MDU RES GROUP COM 552690109 58,059 33,213 133.68 1,046 53.60 0.0695
2024-11-12 2024-09-30 13F MDU RES GROUP COM 552690109 24,846 24,846 681 0.0477
2024-02-12 2023-12-31 13F MDU RES GROUP COM 552690109 0 -13,391 -100.00 0 -100.00
2023-11-13 2023-09-30 13F MDU RES GROUP COM 552690109 13,391 13,391 262 0.0216
2023-08-14 2023-06-30 13F MDU RES GROUP COM 552690109 0 -34,417 -100.00 0 -100.00
2023-05-12 2023-03-31 13F MDU RES GROUP COM 552690109 34,417 25,382 280.93 1,049 282.85 0.0640
2023-02-14 2022-12-31 13F MDU RES GROUP COM 552690109 9,035 9,035 274 0.0181
2022-11-10 2022-09-30 13F MDU RES GROUP COM 552690109 0 -10,653 -100.00 0 -100.00
2022-08-10 2022-06-30 13F MDU RES GROUP COM 552690109 10,653 -9,903 -48.18 288 -47.45 0.0153
2022-05-11 2022-03-31 13F MDU RES GROUP COM 552690109 20,556 -47,570 -69.83 548 -73.92 0.0288
2022-02-10 2021-12-31 13F MDU RES GROUP COM 552690109 68,126 27,352 67.08 2,101 73.64 0.1273
2021-10-28 2021-09-30 13F MDU RES GROUP COM 552690109 40,774 9,418 30.04 1,210 23.09 0.0678
2021-08-10 2021-06-30 13F MDU RES GROUP COM 552690109 31,356 16,206 106.97 983 105.22 0.0528
2021-07-21 2021-03-31 13F MDU RES GROUP COM 552690109 15,150 402 2.73 479 23.45 0.0273
2021-02-12 2020-12-31 13F MDU RES GROUP COM 552690109 14,748 -4,775 -24.46 388 -11.62 0.0280
2020-10-30 2020-09-30 13F MDU RES GROUP COM 552690109 19,523 -36,896 -65.40 439 -64.91 0.0143
2020-08-05 2020-06-30 13F MDU RES GROUP COM 552690109 56,419 -127,797 -69.37 1,251 -68.42 0.0323
2020-05-11 2020-03-31 13F MDU RES GROUP COM 552690109 184,216 19,744 12.00 3,961 -18.93 0.1045
2020-02-13 2019-12-31 13F MDU RES GROUP COM 552690109 164,472 164,472 4,886 0.0686
2019-02-05 2018-12-31 13F MDU RES GROUP COM 552690109 0 -9,466 -100.00 0 -100.00
2018-11-02 2018-09-30 13F MDU RES GROUP COM 552690109 9,466 9,466 243 0.0051
2015-05-12 2015-03-31 13F MDU RES GROUP COM 552690109 0 -31,637 -100.00 0 -100.00
2015-03-16 2014-12-31 13F/A-1 MDU RES GROUP COM 552690109 31,637 -61,817 -66.15 743 -71.41 0.0092
2015-02-13 2014-12-31 13F MDU RES GROUP COM 552690109 34,884 820
2014-10-28 2014-09-30 13F MDU RES GROUP COM 552690109 93,454 17,771 23.48 2,599 -2.15 0.0186
2014-08-05 2014-06-30 13F MDU RES GROUP COM 552690109 75,683 75,683 2,656 0.0181
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.