COSTCO WHOLESALE CORP (COST) Institutional Ownership Changes & 13F Activity

COSTCO WHOLESALE CORP (COST). 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 Renaissance Technologies LLC, Parnassus Endeavor Fund, Sequoia Financial Advisors, Greenbrier Partners Capital Management, and Alapocas Investment Partners.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2020Semper Augustus Investments GroupSell-319,316$5,508
Q4 2019Renaissance Technologies LLCSell-176,900286,013$84,065
Q4 2019Parnassus Endeavor FundBuy33,5412,278,353$669,653
Q4 2019Greenbrier Partners Capital ManagementSell-5,900242,632$71,314
Q4 2019Sequoia Financial AdvisorsBuy3512,730$802
Q4 2019Ariel Appreciation FundBuy33444,912$13,201
Q4 2019Semper Augustus Investments GroupSell-30019,319$5,678
Q4 2019Mairs & Power Growth FundBuy403,493$1,027
Q4 2019Gardner Russo & QuinnSell-55,165$1,518
Q3 2019Renaissance Technologies LLCSell-691,259462,913$133,370
Q3 2019Ariel Appreciation FundSell-48,05744,578$12,843
Q3 2019Parnassus Endeavor FundBuy5,0312,244,812$646,753
Q3 2019Greenbrier Partners Capital ManagementSell-1,468248,532$71,605
Q3 2019Sequoia Financial AdvisorsSell-2262,379$685
Q3 2019Semper Augustus Investments GroupBuy8919,619$5,652
Q3 2019Gardner Russo & QuinnBuy785,170$1,490
Q3 2019Sequoia FundSell-642,415$696
Q3 2019Mairs & Power Growth FundBuy313,453$995
Q2 2019Parnassus Endeavor FundBuy2,214,7812,239,781$591,885
Q2 2019Ariel Appreciation FundSell-42,34192,635$24,480
Q2 2019Sequoia FundSell-4322,479$655
Q2 2019Sequoia Financial AdvisorsBuy4182,605$688
Q2 2019Gardner Russo & QuinnSell-1355,092$1,346
Q2 2019Mairs & Power Growth FundSell-313,422$904
Q2 2019Semper Augustus Investments GroupBuy1419,530$5,161
Q1 2019Renaissance Technologies LLCBuy431,9871,154,172$279,471
Q1 2019Ariel Appreciation FundSell-2,584134,976$32,683
Q1 2019Sequoia Financial AdvisorsBuy5952,187$530
Q1 2019Sequoia FundSell-1142,911$705
Q1 2019Mairs & Power Growth FundSell-693,453$836

Frequently asked questions about COST activity

  • Which institutional owners are buying COST?

    Institutional owners buying COST 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 COST activity?

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

  • Is institutional interest in COST increasing?

    Institutional interest in COST 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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