MDU RESOURCES GROUP INC (MDU) Stock Institutional Trading Activity


MDU RESOURCES GROUP INC (MDU) position changes reported by tracked institutional filers across multiple SEC 13F reporting periods. Based on recent SEC 13F filings (Q4 2025), investors with some of the largest reported share count changes include Renaissance Technologies LLC, Sequoia Financial Advisors, Hancock Classic Value, Mairs & Power Growth Fund, and Parnassus Endeavor Fund. Explore insights into buying and selling patterns, position changes, and investment conviction levels to understand institutional trading behavior and market dynamics.

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Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q4 2017Mairs & Power Growth FundSell-70,739121,631$3,269
Q4 2017Parnassus Endeavor FundSell-13,93415,685,724$421,632
Q3 2017Mairs & Power Growth FundSell-131,645192,370$4,992
Q3 2017Parnassus Endeavor FundBuy307,87615,699,658$407,406
Q2 2017Mairs & Power Growth FundSell-116,147324,015$8,489
Q2 2017Parnassus Endeavor FundBuy762,92715,391,782$403,265
Q1 2017Mairs & Power Growth FundSell-39,850440,162$12,047
Q1 2017Parnassus Endeavor FundBuy753,32814,628,855$388,561
Q4 2016Mairs & Power Growth FundSell-3,660480,012$13,810
Q4 2016Parnassus Endeavor FundBuy174,11113,875,527$399,199
Q3 2016Renaissance Technologies LLCSell-106,75050,400$1,282
Q3 2016Mairs & Power Growth FundSell-54,214483,672$12,305
Q3 2016Parnassus Endeavor FundBuy674,88813,701,416$348,564
Q2 2016Renaissance Technologies LLCSell-814,000157,150$3,772
Q2 2016Mairs & Power Growth FundSell-127,607537,886$12,909
Q2 2016Parnassus Endeavor FundBuy333,19113,026,528$312,637
Q1 2016Renaissance Technologies LLCBuy915,600971,150$18,899
Q1 2016Mairs & Power Growth FundSell-1,203,385665,493$12,951
Q1 2016Parnassus Endeavor FundSell-1,488,15612,693,337$247,012
Q4 2015Renaissance Technologies LLCSell-210,80055,550$1,018
Q4 2015Mairs & Power Growth FundSell-301,4281,868,878$34,238
Q4 2015Parnassus Endeavor FundBuy1,058,73214,181,493$259,805
Q3 2015Mairs & Power Growth FundSell-399,3092,170,306$37,329
Q3 2015Parnassus Endeavor FundBuy2,794,79513,122,761$217,005
Q2 2015Mairs & Power Growth FundBuy73,8202,569,615$50,185
Q2 2015Parnassus Endeavor FundBuy413,54910,327,966$201,705
Q1 2015Renaissance Technologies LLCSell-252,100266,350$5,684
Q1 2015Mairs & Power Growth FundBuy207,8952,495,795$53,260
Q1 2015Parnassus Endeavor FundSell-183,9129,914,417$211,574
Q4 2014Renaissance Technologies LLCSell-110,100518,450$12,184

Frequently asked questions about MDU activity

  • Which institutional owners are buying MDU?

    Institutional owners buying MDU include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in MDU activity?

    "Buy" means an investor increased their reported position in MDU compared to the prior reporting period. This reflects growing exposure to MDU RESOURCES GROUP INC (MDU) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in MDU increasing?

    Institutional interest in MDU can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.