MDU Resources Group, Inc.
MX ˙ BMV ˙ US5526901096
SecurityMX:MDU / MDU Resources Group, Inc.
InstitutionGuggenheim Capital Llc
Latest Disclosed Ownership68,832 shares
Latest Disclosed Value $ 1,426,199
Guggenheim Capital Llc reports 3.75% increase in ownership of MDU / MDU Resources Group, Inc.

On May 15, 2026 - Guggenheim Capital Llc filed a 13F-HR form disclosing ownership of 68,832 shares of MDU Resources Group, Inc. (MX:MDU) valued at $1,426,199 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 66,341 shares of MDU Resources Group, Inc.. This represents a change in shares of 3.75% 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.

Upgrade to unlock premium data and export to Excel .

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 68,832 2,491 3.75 1,426 10.20 0.0055
2026-02-17 2025-12-31 13F MDU RES GROUP COM 552690109 66,341 -7,484 -10.14 1,295 -1.52 0.0046
2025-11-13 2025-09-30 13F MDU RES GROUP COM 552690109 73,825 4,939 7.17 1,315 14.46 0.0068
2025-08-13 2025-06-30 13F MDU RES GROUP COM 552690109 68,886 14,728 27.19 1,148 25.46 0.0091
2025-05-14 2025-03-31 13F MDU RES GROUP COM 552690109 54,158 12,281 29.33 916 21.35 0.0084
2025-02-13 2024-12-31 13F MDU RES GROUP COM 552690109 41,877 -251,126 -85.71 755 -90.61 0.0061
2024-11-13 2024-09-30 13F MDU RES GROUP COM 552690109 293,003 -25,619 -8.04 8,031 0.43 0.0562
2024-08-14 2024-06-30 13F MDU RES GROUP COM 552690109 318,622 -9,751 -2.97 7,997 -3.36 0.0567
2024-05-14 2024-03-31 13F MDU RES GROUP COM 552690109 328,373 4,420 1.36 8,275 29.01 0.0583
2024-02-14 2023-12-31 13F MDU RES GROUP COM 552690109 323,953 16,966 5.53 6,414 6.72 0.0485
2023-11-14 2023-09-30 13F MDU RES GROUP COM 552690109 306,987 14,478 4.95 6,011 -1.88 0.0517
2023-08-11 2023-06-30 13F MDU RES GROUP COM 552690109 292,509 12,109 4.32 6,125 -28.33 0.0481
2023-05-11 2023-03-31 13F MDU RES GROUP COM 552690109 280,400 -8,437 -2.92 8,547 -2.48 0.0719
2023-02-14 2022-12-31 13F MDU RES GROUP COM 552690109 288,837 -5,503 -1.87 8,763 8.86 0.0770
2022-11-14 2022-09-30 13F MDU RES GROUP COM 552690109 294,340 229,681 355.22 8,050 361.32 0.0737
2022-08-15 2022-06-30 13F MDU RES GROUP COM 552690109 64,659 -16,547 -20.38 1,745 -19.36 0.0138
2022-05-16 2022-03-31 13F MDU RES GROUP COM 552690109 81,206 -28,500 -25.98 2,164 -36.03 0.0130
2022-02-14 2021-12-31 13F MDU RES GROUP COM 552690109 109,706 -31,871 -22.51 3,383 -19.45 0.0176
2021-11-15 2021-09-30 13F MDU RES GROUP COM 552690109 141,577 -12,278 -7.98 4,200 -12.90 0.0252
2021-08-13 2021-06-30 13F MDU RES GROUP COM 552690109 153,855 -308,685 -66.74 4,822 -67.02 0.0284
2021-05-13 2021-03-31 13F MDU RES GROUP COM 552690109 462,540 -32,638 -6.59 14,621 12.10 0.0960
2021-02-16 2020-12-31 13F MDU RES GROUP COM 552690109 495,178 -94,122 -15.97 13,043 -1.63 0.0818
2020-11-13 2020-09-30 13F MDU RES GROUP COM 552690109 589,300 -20,345 -3.34 13,259 -1.94 0.0960
2020-08-14 2020-06-30 13F MDU RES GROUP COM 552690109 609,645 -1,450 -0.24 13,522 2.91 0.1046
2020-06-02 2020-03-31 13F MDU RES GROUP COM 552690109 611,095 28,977 4.98 13,139 -24.03 0.1323
2020-02-20 2019-12-31 13F/A-1 MDU RES GROUP COM 552690109 582,118 26,057 4.69 17,294 10.33 0.1299
2020-02-14 2019-12-31 13F MDU RES GROUP COM 552690109 582,118 26,057 17,294 102,498.0811
2020-02-20 2019-09-30 13F/A-1 MDU RES GROUP COM 552690109 556,061 -14,893 -2.61 15,675 6.42 0.1253
2019-11-14 2019-09-30 13F MDU RES GROUP COM 552690109 556,061 -14,893 15,675 114,870.9979
2019-08-14 2019-06-30 13F MDU RES GROUP COM 552690109 570,954 78,322 15.90 14,730 15.76 0.1199
2019-05-15 2019-03-31 13F MDU RES GROUP COM 552690109 492,632 403,905 455.22 12,725 501.65 0.1037
2019-02-14 2018-12-31 13F MDU RES GROUP COM 552690109 88,727 12,835 16.91 2,115 8.52 0.0179
2018-11-14 2018-09-30 13F MDU RES GROUP COM 552690109 75,892 18,852 33.05 1,949 19.06 0.0127
2018-08-14 2018-06-30 13F MDU RES GROUP COM 552690109 57,040 -84,580 -59.72 1,637 -58.94 0.0109
2018-05-15 2018-03-31 13F MDU RES GROUP COM 552690109 141,620 40,240 39.69 3,987 46.31 0.0097
2018-02-14 2017-12-31 13F MDU RES GROUP COM 552690109 101,380 -166,018 -62.09 2,725 -60.73 0.0065
2017-11-14 2017-09-30 13F MDU RES GROUP COM 552690109 267,398 6,524 2.50 6,939 1.52 0.0163
2017-08-14 2017-06-30 13F MDU RES GROUP COM 552690109 260,874 59,607 29.62 6,835 24.07 0.0181
2017-05-15 2017-03-31 13F MDU RES GROUP COM 552690109 201,267 -49,122 -19.62 5,509 -23.53 0.0149
2017-02-14 2016-12-31 13F MDU RES GROUP COM 552690109 250,389 63,905 34.27 7,204 51.85 0.0206
2016-11-14 2016-09-30 13F MDU RES GROUP COM 552690109 186,484 -46,950 -20.11 4,744 -15.32 0.0148
2016-08-15 2016-06-30 13F MDU RES GROUP COM 552690109 233,434 42,309 22.14 5,602 50.59 0.0176
2016-05-16 2016-03-31 13F MDU RES GROUP COM 552690109 191,125 56,900 42.39 3,720 51.28 0.0117
2016-02-16 2015-12-31 13F MDU RES GROUP COM 552690109 134,225 30,223 29.06 2,459 37.53 0.0072
2015-11-16 2015-09-30 13F MDU RES GROUP COM 552690109 104,002 -363,654 -77.76 1,788 -80.42 0.0055
2015-08-14 2015-06-30 13F MDU RES GROUP COM 552690109 467,656 -305,596 -39.52 9,133 -44.65 0.0225
2015-05-18 2015-03-31 13F/A-1 MDU RES GROUP COM 552690109 773,252 377,648 95.46 16,501 77.51 0.0391
2015-05-15 2015-03-31 13F MDU RES GROUP COM 552690109 773,252 16,501
2015-02-17 2014-12-31 13F MDU RES GROUP COM 552690109 395,604 57,658 17.06 9,296 -1.10 0.0233
2014-11-14 2014-09-30 13F MDU RES GROUP COM 552690109 337,946 -31,761 -8.59 9,399 -27.57 0.0227
2014-08-14 2014-06-30 13F MDU RES GROUP COM 552690109 369,707 -964,824 -72.30 12,976 -71.66 0.0328
2014-05-16 2014-03-31 13F MDU RES GROUP COM 552690109 1,334,531 538,508 67.65 45,788 88.29 0.1302
2014-02-14 2013-12-31 13F MDU RES GROUP COM 552690109 796,023 -15,562 -1.92 24,318 7.13 0.0739
2013-11-14 2013-09-30 13F MDU RES GROUP COM 552690109 811,585 37,223 4.81 22,700 13.14 0.0815
2013-08-22 2013-06-30 13F/A-1 MDU RES GROUP COM 552690109 774,362 774,362 20,063 0.0844
2013-08-14 2013-06-30 13F MDU RES GROUP COM 552690109 848,738 21,406 0.0903
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.