MONOLITHIC POWER SYSTEMS INC (MPWR) Institutional Ownership Changes & 13F Activity

MONOLITHIC POWER SYSTEMS INC (MPWR). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Parnassus Endeavor Fund, Torray Fund, Sequoia Financial Advisors, Renaissance Technologies LLC, and Matrix Private Capital Group.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q2 2021Renaissance Technologies LLCSell-61,500102,786$38,385
Q2 2021Torray FundBuy354,626$1,728
Q1 2021Torray FundBuy584,591$1,622
Q4 2020Torray FundSell-6484,533$1,660
Q3 2020Renaissance Technologies LLCBuy47,500164,286$45,936
Q3 2020Torray FundSell-1,4085,181$1,449
Q3 2020Parnassus Endeavor FundSell-1,15250,262$14,054
Q2 2020Renaissance Technologies LLCBuy90,300116,786$27,678
Q2 2020Parnassus Endeavor FundSell-61,41351,414$12,185
Q2 2020Torray FundSell-1,0526,589$1,562
Q1 2020Renaissance Technologies LLCBuy22,90026,486$4,435
Q1 2020Torray FundBuy3087,641$1,280
Q4 2019Torray FundBuy6887,333$1,305
Q3 2019Renaissance Technologies LLCSell-65,5003,586$558
Q2 2019Parnassus Endeavor FundBuy112,827112,827$15,320
Q2 2019Renaissance Technologies LLCBuy51,44469,086$9,380
Q2 2019Torray FundSell-586,645$902
Q1 2019Torray FundBuy1726,703$908
Q4 2018Renaissance Technologies LLCBuy14,05617,642$2,051
Q4 2018Torray FundBuy6,5316,531$759
Q3 2018Polen Capital ManagementBuy3253,903$490
Q2 2018Polen Capital ManagementBuy3873,578$478
Q1 2018Polen Capital ManagementBuy9453,191$370
Q1 2018Renaissance Technologies LLCSell-4143,586$415
Q4 2017Polen Capital ManagementBuy2,2462,246$252
Q2 2017Renaissance Technologies LLCSell-3004,000$386
Q1 2017Renaissance Technologies LLCSell-52,8004,300$396
Q4 2016Renaissance Technologies LLCSell-114,20057,100$4,678
Q3 2016Renaissance Technologies LLCSell-177,586171,300$13,790
Q2 2016Renaissance Technologies LLCSell-344,400348,886$23,836

Frequently asked questions about MPWR activity

  • Which institutional owners are buying MPWR?

    Institutional owners buying MPWR 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 MPWR activity?

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

  • Is institutional interest in MPWR increasing?

    Institutional interest in MPWR 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.

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