MDU Resources Group, Inc.
MX ˙ BMV ˙ US5526901096
SecurityMX:MDU / MDU Resources Group, Inc.
InstitutionMillennium Management Llc
ManagerIsrael Englander
Latest Disclosed Ownership333,965 shares
Latest Disclosed Value $ 6,919,755
Millennium Management Llc ownership in MDU / MDU Resources Group, Inc.

On May 15, 2026 - Millennium Management Llc filed a 13F-HR form disclosing ownership of 333,965 shares of MDU Resources Group, Inc. (MX:MDU) valued at $6,919,755 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 353,559 shares of MDU Resources Group, Inc.. This represents a change in shares of -5.54% during the quarter.

Millennium Management Llc has a history of taking positions in derivatives of the underlying security (MDU) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:MDU / MDU Resources Group, Inc. Historical Put/Call Ratio
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 333,965 -19,594 -5.54 6,920 0.26 0.0029
2026-02-17 2025-12-31 13F MDU RES GROUP COM 552690109 353,559 -773,350 -68.63 6,901 -65.62 0.0029
2025-11-14 2025-09-30 13F MDU RES GROUP COM 552690109 1,126,909 55,861 5.22 20,070 12.41 0.0086
2025-08-14 2025-06-30 13F MDU RES GROUP COM 552690109 1,071,048 -272,931 -20.31 17,854 -21.44 0.0086
2025-05-15 2025-03-31 13F MDU RES GROUP COM 552690109 1,343,979 682,098 103.05 22,727 90.54 0.0121
2025-02-14 2024-12-31 13F MDU RES GROUP COM 552690109 661,881 334,713 102.31 11,927 33.01 0.0058
2024-11-14 2024-09-30 13F MDU RES GROUP COM 552690109 327,168 86,367 35.87 8,968 48.36 0.0043
2024-08-14 2024-06-30 13F MDU RES GROUP COM 552690109 240,801 -479,713 -66.58 6,044 -66.71 0.0028
2024-05-15 2024-03-31 13F MDU RES GROUP COM 552690109 720,514 -634,366 -46.82 18,157 -32.32 0.0078
2024-02-14 2023-12-31 13F MDU RES GROUP COM 552690109 1,354,880 -791,580 -36.88 26,827 -36.17 0.0116
2023-11-14 2023-09-30 13F MDU RES GROUP COM 552690109 2,146,460 66,324 3.19 42,028 -3.51 0.0212
2023-08-14 2023-06-30 13F MDU RES GROUP COM 552690109 2,080,136 1,140,807 121.45 43,558 52.14 0.0215
2023-05-15 2023-03-31 13F MDU RES GROUP COM 552690109 939,329 -58,605 -5.87 28,631 -5.44 0.0164
2023-02-14 2022-12-31 13F MDU RES GROUP COM 552690109 997,934 732,104 275.40 30,277 316.46 0.0168
2022-11-14 2022-09-30 13F MDU RES GROUP COM 552690109 265,830 132,306 99.09 7,270 101.72 0.0043
2022-08-15 2022-06-30 13F MDU RES GROUP COM 552690109 133,524 -1,812,908 -93.14 3,604 -93.05 0.0022
2022-05-16 2022-03-31 13F MDU RES GROUP COM 552690109 1,946,432 108,537 5.91 51,872 -8.48 0.0275
2022-02-14 2021-12-31 13F MDU RES GROUP COM 552690109 1,837,895 1,286,576 233.36 56,681 246.50 0.0288
2021-11-15 2021-09-30 13F MDU RES GROUP COM 552690109 551,319 -388,077 -41.31 16,358 -44.44 0.0098
2021-08-16 2021-06-30 13F MDU RES GROUP COM 552690109 939,396 765,108 438.99 29,441 434.42 0.0181
2021-05-17 2021-03-31 13F MDU RES GROUP COM 552690109 174,288 92,721 113.67 5,509 156.47 0.0039
2021-02-16 2020-12-31 13F MDU RES GROUP COM 552690109 81,567 39,751 95.06 2,148 128.27 0.0016
2020-11-16 2020-09-30 13F MDU RES GROUP COM 552690109 41,816 -281,127 -87.05 941 -86.86 0.0012
2020-08-14 2020-06-30 13F MDU RES GROUP COM 552690109 322,943 290,861 906.62 7,163 938.12 0.0098
2020-05-14 2020-03-31 13F MDU RES GROUP COM 552690109 32,082 -1,663,222 -98.11 690 -98.63 0.0016
2020-02-14 2019-12-31 13F MDU RES GROUP COM 552690109 1,695,304 424,119 33.36 50,367 40.56 0.0630
2019-11-14 2019-09-30 13F MDU RES GROUP COM 552690109 1,271,185 711,670 127.19 35,834 148.24 0.0566
2019-08-15 2019-06-30 13F/A-1 MDU RES GROUP COM 552690109 559,515 327,963 141.64 14,435 141.35 0.0217
2019-08-14 2019-06-30 13F MDU RES GROUP COM 552690109 559,515 327,963 14,435
2019-05-14 2019-03-31 13F MDU RES GROUP COM 552690109 231,552 10,976 4.98 5,981 13.73 0.0090
2019-02-15 2018-12-31 13F/A-1 MDU RES GROUP COM 552690109 220,576 -923,980 -80.73 5,259 -82.11 0.0082
2019-02-14 2018-12-31 13F MDU RES GROUP COM 552690109 220,576 5,259
2018-11-14 2018-09-30 13F MDU RES GROUP COM 552690109 1,144,556 222,063 24.07 29,404 11.14 0.0360
2018-08-14 2018-06-30 13F MDU RES GROUP COM 552690109 922,493 155,959 20.35 26,457 22.57 0.0345
2018-05-15 2018-03-31 13F MDU RES GROUP COM 552690109 766,534 98,891 14.81 21,586 20.28 0.0288
2018-02-14 2017-12-31 13F MDU RES GROUP COM 552690109 667,643 605,750 978.71 17,946 1,017.43 0.0248
2017-11-14 2017-09-30 13F MDU RES GROUP COM 552690109 61,893 61,893 1,606 0.0024
2017-08-14 2017-06-30 13F MDU RES GROUP COM 552690109 0 -711,105 -100.00 0 -100.00
2017-05-15 2017-03-31 13F MDU RES GROUP COM 552690109 711,105 711,105 19,463 0.0357
2017-02-14 2016-12-31 13F MDU RES GROUP COM 552690109 0 -778,215 -100.00 0 -100.00
2016-11-14 2016-09-30 13F MDU RES GROUP COM 552690109 778,215 778,215 0.00 19,798 0.0332
2016-08-15 2016-06-30 13F MDU RES GROUP COM 552690109 0 -281,663 -100.00 0 -100.00
2016-05-16 2016-03-31 13F MDU RES GROUP COM 552690109 281,663 -80,266 -22.18 5,481 -17.34 0.0137
2016-02-16 2015-12-31 13F MDU RES GROUP COM 552690109 361,929 361,929 0.00 6,631 0.0139
2015-11-16 2015-09-30 13F MDU RES GROUP COM 552690109 0 -385,306 -100.00 0 -100.00
2015-08-14 2015-06-30 13F MDU RES GROUP COM 552690109 385,306 -305,465 -44.22 7,525 -48.95 0.0142
2015-05-15 2015-03-31 13F MDU RES GROUP COM 552690109 690,771 131,171 23.44 14,741 12.09 0.0274
2015-02-17 2014-12-31 13F MDU RES GROUP COM 552690109 559,600 395,635 241.29 13,151 188.40 0.0279
2014-11-14 2014-09-30 13F MDU RES GROUP COM 552690109 163,965 -107,147 -39.52 4,560 -52.08 0.0115
2014-08-14 2014-06-30 13F MDU RES GROUP COM 552690109 271,112 -9,430 -3.36 9,516 -1.13 0.0264
2014-05-15 2014-03-31 13F MDU RES GROUP COM 552690109 280,542 -266,744 -48.74 9,625 -42.43 0.0279
2014-02-14 2013-12-31 13F MDU RES GROUP COM 552690109 547,286 374,908 217.49 16,720 246.82 0.0528
2013-11-14 2013-09-30 13F MDU RES GROUP COM 552690109 172,378 172,378 4,821 0.0155
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-02-14 2023-12-31 13F MDU RES GROUP COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-11-14 2023-09-30 13F MDU RES GROUP COM Call 38,500 754 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2024-02-14 2023-12-31 13F MDU RES GROUP COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-11-14 2023-09-30 13F MDU RES GROUP COM Put 38,200 748 n/a n/a n/a
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.