DONALDSON CO INC (DCI) Stock Institutional Trading Activity


DONALDSON CO INC (DCI) 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 Mairs & Power Growth Fund, Jensen Investment Management, First Eagle U.S. Value, Sequoia Financial Advisors, and Renaissance Technologies LLC. 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
Q1 2017Renaissance Technologies LLCSell-459,70082,300$3,746
Q4 2016Mairs & Power Growth FundSell-262,0975,340,576$224,731
Q4 2016Renaissance Technologies LLCBuy352,100542,000$22,807
Q3 2016Mairs & Power Growth FundSell-63,4545,602,673$209,148
Q3 2016Renaissance Technologies LLCBuy40,900189,900$7,089
Q3 2016Vulcan Value PartnersSell-1,813633,805$23,660
Q2 2016Mairs & Power Growth FundBuy215,4215,666,127$194,688
Q2 2016Vulcan Value PartnersBuy11635,618$21,840
Q1 2016Mairs & Power Growth FundBuy95,5585,450,706$173,932
Q1 2016Vulcan Value PartnersSell-809,521635,607$20,282
Q4 2015Mairs & Power Growth FundBuy50,9735,355,148$153,479
Q4 2015Renaissance Technologies LLCBuy59,400149,000$4,270
Q4 2015Vulcan Value PartnersBuy13,2681,445,128$41,417
Q3 2015Mairs & Power Growth FundBuy87,7305,304,175$148,941
Q3 2015Renaissance Technologies LLCSell-1,60089,600$2,516
Q3 2015Vulcan Value PartnersBuy666,2501,431,860$40,207
Q2 2015Mairs & Power Growth FundBuy25,2875,216,445$186,749
Q2 2015Vulcan Value PartnersBuy3,097765,610$27,409
Q1 2015Mairs & Power Growth FundBuy116,9455,191,158$195,759
Q1 2015Vulcan Value PartnersBuy144,525762,513$28,754
Q4 2014Mairs & Power Growth FundBuy380,0745,074,213$196,017
Q4 2014Renaissance Technologies LLCSell-133,10091,200$3,523
Q4 2014Vulcan Value PartnersBuy30,067617,988$23,873
Q3 2014Mairs & Power Growth FundBuy187,6544,694,139$190,723
Q3 2014Renaissance Technologies LLCSell-271,698224,300$9,113
Q3 2014Vulcan Value PartnersSell-32,305587,921$23,593
Q2 2014Mairs & Power Growth FundBuy257,6804,506,485$190,714
Q2 2014Vulcan Value PartnersBuy10,218620,226$26,248
Q1 2014Mairs & Power Growth FundSell-4,5324,248,805$180,149
Q1 2014Vulcan Value PartnersBuy159,673610,008$25,864

Frequently asked questions about DCI activity

  • Which institutional owners are buying DCI?

    Institutional owners buying DCI 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 DCI activity?

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

  • Is institutional interest in DCI increasing?

    Institutional interest in DCI 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.