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
Q2 2021Gardner Russo & QuinnSell-1265,168$2,045
Q2 2021Mairs & Power Growth FundSell-813,237$1,281
Q2 2021Semper Augustus Investments GroupSell-106,750$2,671
Q1 2021Renaissance Technologies LLCSell-108,86751,500$18,153
Q1 2021Parnassus Endeavor FundBuy17,2241,940,284$683,912
Q1 2021Sequoia Financial AdvisorsBuy11,42313,804$4,866
Q1 2021Mairs & Power Growth FundSell-1143,318$1,170
Q1 2021Gardner Russo & QuinnSell-1015,294$1,866
Q4 2020Parnassus Endeavor FundSell-104,3081,923,060$724,571
Q4 2020Semper Augustus Investments GroupSell-10,4786,760$2,547
Q4 2020Sequoia Financial AdvisorsBuy1222,381$897
Q4 2020Mairs & Power Growth FundBuy803,432$1,293
Q4 2020Gardner Russo & QuinnBuy25,395$2,033
Q3 2020Renaissance Technologies LLCSell-890,079160,367$56,930
Q3 2020Parnassus Endeavor FundSell-201,2672,027,368$719,716
Q3 2020Sequoia Financial AdvisorsBuy2,2592,259$802
Q3 2020Semper Augustus Investments GroupSell-1,92317,238$6,119
Q3 2020Mairs & Power Growth FundSell-1413,352$1,190
Q3 2020Gardner Russo & QuinnSell-265,393$1,914
Q2 2020Renaissance Technologies LLCSell-224,7721,050,446$318,506
Q2 2020Parnassus Endeavor FundBuy3,5422,228,635$675,744
Q2 2020Sequoia Financial AdvisorsSell-2,7130$576
Q2 2020Gardner Russo & QuinnBuy3905,419$1,643
Q2 2020Semper Augustus Investments GroupSell-15519,161$5,810
Q2 2020Lountzis Asset ManagementBuy5050$15
Q1 2020Renaissance Technologies LLCBuy989,2051,275,218$363,603
Q1 2020Parnassus Endeavor FundSell-53,2602,225,093$634,441
Q1 2020Ariel Appreciation FundSell-31,85113,061$3,724
Q1 2020Gardner Russo & QuinnSell-1365,029$1,434
Q1 2020Sequoia Financial AdvisorsSell-172,713$773

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.

Related COST Institutional Insights