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 2015Renaissance Technologies LLCSell-760,2131,195,000$181,037
Q1 2015Greenbrier Partners Capital ManagementBuy15,512200,000$30,299
Q1 2015Ariel Appreciation FundBuy1113,500$530
Q4 2014Renaissance Technologies LLCBuy400,3001,955,213$277,151
Q4 2014Ariel Appreciation FundSell-1,8323,389$480
Q4 2014Mairs & Power Growth FundBuy4502,641$374
Q4 2014Semper Augustus Investments GroupSell-10020,402$2,892
Q3 2014Renaissance Technologies LLCBuy504,0131,554,913$194,862
Q3 2014Greenbrier Partners Capital ManagementSell-15,512184,488$23,120
Q3 2014Ariel Appreciation FundBuy1645,221$654
Q3 2014Mairs & Power Growth FundSell-752,191$275
Q2 2014Renaissance Technologies LLCSell-196,9001,050,900$121,022
Q2 2014Ariel Appreciation FundBuy5,0575,057$582
Q2 2014Mairs & Power Growth FundSell-2482,266$261
Q1 2014Renaissance Technologies LLCSell-1,609,7131,247,800$139,354
Q1 2014Mairs & Power Growth FundBuy5452,514$281
Q4 2013Renaissance Technologies LLCBuy1,355,8002,857,513$340,101
Q4 2013Mairs & Power Growth FundSell-2001,969$234
Q3 2013Renaissance Technologies LLCBuy959,2131,501,713$172,952
Q3 2013Mairs & Power Growth FundBuy2032,169$250
Q2 2013Berkshire HathawayBuy4,333,3634,333,363$479,140
Q2 2013Renaissance Technologies LLCBuy542,500542,500$59,984
Q2 2013Greenbrier Partners Capital ManagementBuy200,000200,000$22,114
Q2 2013Semper Augustus Investments GroupBuy20,50220,502$2,267
Q2 2013Mairs & Power Growth FundBuy1,9661,966$217

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