MDU Resources Group, Inc.
MX ˙ BMV ˙ US5526901096
SecurityMX:MDU / MDU Resources Group, Inc.
InstitutionElgethun Capital Management
Latest Disclosed Ownership10,974 shares
Latest Disclosed Value $ 227,383
Elgethun Capital Management reports 0.40% increase in ownership of MDU / MDU Resources Group, Inc.

On May 14, 2026 - Elgethun Capital Management filed a 13F-HR form disclosing ownership of 10,974 shares of MDU Resources Group, Inc. (MX:MDU) valued at $227,383 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 10,930 shares of MDU Resources Group, Inc.. This represents a change in shares of 0.40% 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)
2026-05-14 2026-03-31 13F MDU RES GROUP COM 552690109 10,974 44 0.40 227 6.57 0.0376
2026-02-10 2025-12-31 13F MDU RES GROUP COM 552690109 10,930 49 0.45 213 10.36 0.0369
2025-11-13 2025-09-30 13F MDU RES GROUP COM 552690109 10,881 168 1.57 194 8.43 0.0352
2025-08-13 2025-06-30 13F MDU RES GROUP COM 552690109 10,713 47 0.44 179 -1.11 0.0359
2025-05-09 2025-03-31 13F MDU RES GROUP COM 552690109 10,666 44 0.41 180 -5.76 0.0403
2025-02-13 2024-12-31 13F MDU RES GROUP COM 552690109 10,622 29 0.27 191 -34.14 0.0465
2024-11-14 2024-09-30 13F MDU RES GROUP COM 552690109 10,593 -192 -1.78 290 7.41 0.0682
2024-08-14 2024-06-30 13F MDU RES GROUP COM 552690109 10,785 36 0.33 271 -0.37 0.0682
2024-05-14 2024-03-31 13F MDU RES GROUP COM 552690109 10,749 47 0.44 272 28.44 0.0685
2024-02-14 2023-12-31 13F MDU RES GROUP COM 552690109 10,702 49 0.46 212 2.43 0.0600
2023-11-13 2023-09-30 13F MDU RES GROUP COM 552690109 10,653 76 0.72 207 -6.79 0.0623
2023-08-11 2023-06-30 13F MDU RES GROUP COM 552690109 10,577 52 0.49 221 -31.15 0.0668
2023-05-12 2023-03-31 13F MDU RES GROUP COM 552690109 10,525 51 0.49 322 0.63 0.1018
2023-02-10 2022-12-31 13F MDU RES GROUP COM 552690109 10,474 53 0.51 319 11.93 0.1154
2022-11-14 2022-09-30 13F MDU RES GROUP COM 552690109 10,421 57 0.55 285 31.94 0.1139
2022-08-12 2022-06-30 13F MDU RES GROUP COM 552690109 10,364 57 0.55 216 -21.45 0.0838
2022-05-11 2022-03-31 13F MDU RES GROUP COM 552690109 10,307 48 0.47 275 -12.42 0.0932
2022-02-11 2021-12-31 13F MDU RES GROUP COM 552690109 10,259 48 0.47 314 3.29 0.1097
2021-11-12 2021-09-30 13F MDU RES GROUP COM 552690109 10,211 45 0.44 304 -4.70 0.1049
2021-08-13 2021-06-30 13F MDU RES GROUP COM 552690109 10,166 45 0.44 319 -0.31 0.1097
2021-05-14 2021-03-31 13F MDU RES GROUP COM 552690109 10,121 55 0.55 320 20.75 0.1245
2021-02-11 2020-12-31 13F MDU RES GROUP COM 552690109 10,066 -996 -9.00 265 6.43 0.1132
2020-11-13 2020-09-30 13F MDU RES GROUP COM 552690109 11,062 0 0.00 249 45.61 0.1363
2020-08-13 2020-06-30 13F MDU RES GROUP COM 552690109 11,062 0 0.00 171 -28.15 0.0994
2020-05-08 2020-03-31 13F MDU RES GROUP COM 552690109 11,062 0 0.00 238 -27.66 0.1322
2020-02-10 2019-12-31 13F MDU RES GROUP COM 552690109 11,062 0 0.00 329 5.79 0.1602
2019-11-08 2019-09-30 13F MDU RES GROUP COM 552690109 11,062 0 0.00 311 9.12 0.1656
2019-08-08 2019-06-30 13F MDU RES GROUP COM 552690109 11,062 -195 -1.73 285 -2.06 0.1555
2019-05-08 2019-03-31 13F MDU RES GROUP COM 552690109 11,257 0 0.00 291 9.40 0.1696
2019-02-11 2018-12-31 13F MDU RES GROUP COM 552690109 11,257 0 0.00 266 -7.96 0.1844
2018-11-13 2018-09-30 13F MDU RES GROUP COM 552690109 11,257 -2,000 -15.09 289 -23.95 0.1875
2018-08-09 2018-06-30 13F MDU RES GROUP COM 552690109 13,257 0 0.00 380 1.88 0.2691
2018-05-11 2018-03-31 13F MDU RES GROUP COM 552690109 13,257 -6,000 -31.16 373 -27.99 0.2609
2018-02-09 2017-12-31 13F MDU RES GROUP COM 552690109 19,257 -1,000 -4.94 518 -1.52 0.3625
2017-11-13 2017-09-30 13F MDU RES GROUP COM 552690109 20,257 0 0.00 526 -0.94 0.3863
2017-08-10 2017-06-30 13F MDU RES GROUP COM 552690109 20,257 0 0.00 531 -4.15 0.4134
2017-05-11 2017-03-31 13F MDU RES GROUP COM 552690109 20,257 -50 -0.25 554 -5.46 0.4442
2017-02-09 2016-12-31 13F/A-1 MDU RES GROUP COM 552690109 20,307 20,307 586 0.4579
2017-02-09 2016-12-31 13F MDU RES GROUP COM 552690109 20,307 586 0.4579
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.