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 2025Torray FundSell-7636$629,602
Q2 2025Gardner Russo & QuinnSell-44,633$4,585,964
Q1 2025Parnassus Endeavor FundSell-203,468507,363$479,853,778
Q1 2025Renaissance Technologies LLCBuy90,148121,199$114,628,166
Q1 2025Alapocas Investment PartnersSell-1,68010,373$9,810,576
Q1 2025Sequoia Financial AdvisorsBuy1,09270,068$66,268,889
Q1 2025Gardner Russo & QuinnSell-7604,637$4,386,010
Q1 2025Matrix Advisors Value FundSell-321573$542,075
Q1 2025Semper Augustus Investments GroupSell-1054,245$4,014,836
Q1 2025Mairs & Power Growth FundSell-392,700$2,553,606
Q4 2024Parnassus Endeavor FundSell-51,368710,831$651,313,120
Q4 2024Sequoia Financial AdvisorsBuy16,96768,976$63,200,387
Q4 2024Mairs & Power Growth FundSell-3582,739$2,509,664
Q4 2024Matrix Advisors Value FundBuy350894$819,145
Q4 2024Alapocas Investment PartnersSell-13212,053$11,043,802
Q4 2024Gardner Russo & QuinnSell-255,397$4,945,436
Q4 2024Semper Augustus Investments GroupBuy204,350$3,985,775
Q4 2024Cullen Value FundBuy6263$241,162
Q3 2024Renaissance Technologies LLCBuy26,10831,051$27,528,374
Q3 2024Sequoia Financial AdvisorsBuy6,77052,009$46,107,423
Q3 2024Parnassus Endeavor FundSell-937762,199$675,704,658
Q3 2024Mairs & Power Growth FundSell-6373,097$2,745,552
Q3 2024Greenbrier Partners Capital ManagementSell-295224,352$209,293,494
Q3 2024Alapocas Investment PartnersSell-13212,185$10,802,246
Q3 2024Giverny CapitalSell-110240$212,765
Q3 2024Gardner Russo & QuinnSell-555,422$4,806,931
Q3 2024Torray FundSell-15643$570,032
Q2 2024Renaissance Technologies LLCSell-227,8494,943$4,201,906
Q2 2024Torray FundSell-36,486658$559,293
Q2 2024Parnassus Endeavor FundSell-6,311763,136$648,657,969

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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