Costco Wholesale Corp

COST

Exchange: Nasdaq
Industry: Retail-Variety Stores
SEC CIK: 0000909832

SEC filings (opens in a new tab)

In the last 90 days, Costco Wholesale Corp insiders filed 0 open-market purchases and 2 sales; 4,261 institutions reported holding it in 13F filings for Q2 2026, worth $301.8B in total; 4 superinvestors hold it, including Markel Group and Gardner Russo & Quinn.

13F holders, Q3 2026

Institutional positions in Costco Wholesale Corp as of Sep 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Q3 2026 data is still coming in (13F filing deadline: Nov 16, 2026), so these numbers are incomplete.

Institutional holders: 10; 0 vs. Q2 2026
Shares held: 30.8K; −1.61K (−5.0%) vs. Q2 2026
Total value: $28.1M; −$2.28M (−7.5%) vs. Q2 2026
New holders: 0; 1 more added
Sold out: 0; 6 more reduced

4,251 institutions that held it in Q2 2026 haven't filed for Q3 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting COST on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holders

Value held

Institutions holding COST and their total value by quarter
Quarter	Holders	Value
Q2 2026	4,261	$301.8B
Q1 2026	4,275	$311.5B
Q4 2025	4,139	$272.0B
Q3 2025	3,942	$274.4B
Q2 2025	4,012	$302.3B
Q1 2025	3,953	$287.8B
Q4 2024	3,942	$279.6B
Q3 2024	3,591	$266.7B
Q2 2024	3,527	$258.3B
Q1 2024	3,420	$222.0B
Q4 2023	3,344	$201.0B
Q3 2023	3,078	$169.9B
Q2 2023	3,042	$162.0B
Q1 2023	2,944	$149.2B
Q4 2022	2,939	$137.2B
Q3 2022	2,826	$141.6B
Q2 2022	2,785	$143.4B
Q1 2022	2,863	$172.4B
Q4 2021	2,823	$170.2B
Q3 2021	2,463	$134.3B
Q2 2021	2,394	$119.0B
Q1 2021	2,359	$104.1B

Institutions, Q3 2026

Shares, value and share of portfolio for each institution holding Costco Wholesale Corp; share changes are against Q2 2026.

Institutions holding COST in Q3 2026
Institution	Shares	Value	% of portfolio	Change in shares	Action
Fjarde Ap-Fonden /Fourth Swedish National Pension Fund	–	–	–	–	Not filed
Teacher Retirement System of Texas	–	–	–	–	Not filed
Resona Asset Management Co.,Ltd.	–	–	–	–	Not filed
Voloridge Investment Management, LLC	–	–	–	–	Not filed
Mercer Global Advisors Inc	–	–	–	–	Not filed
Alecta Pensionsforsakring, Omsesidigt	–	–	–	–	Not filed
Welch & Forbes LLC	–	–	–	–	Not filed
Nissay Asset Management Corp	–	–	–	–	Not filed
TCW Group Inc	–	–	–	–	Not filed
EP Wealth Advisors, LLC	–	–	–	–	Not filed
GWM Advisors LLC	–	–	–	–	Not filed
Daiwa Securities Group Inc.	–	–	–	–	Not filed
Harel Insurance Investments & Financial Services Ltd.	–	–	–	–	Not filed
State of Tennessee, Treasury Department	–	–	–	–	Not filed
Pictet & Cie (Europe) SA	–	–	–	–	Not filed
Tredje AP-fonden	–	–	–	–	Not filed
Jacobs Levy Equity Management, Inc	–	–	–	–	Not filed
State of New Jersey Common Pension Fund D	–	–	–	–	Not filed
Holocene Advisors, LP	–	–	–	–	Not filed
Guggenheim Capital LLC	–	–	–	–	Not filed
Bartlett & Co. Wealth Management LLC	–	–	–	–	Not filed
Swiss Life Asset Management Ltd	–	–	–	–	Not filed
MML Investors Services, LLC	–	–	–	–	Not filed
Cambridge Investment Research Advisors, Inc.	–	–	–	–	Not filed
Steginsky Capital LLC	–	–	–	–	Not filed
KBC Group NV	–	–	–	–	Not filed
Local Pensions Partnership Investment Ltd	–	–	–	–	Not filed
Woodline Partners LP	–	–	–	–	Not filed
Menora Mivtachim Holdings Ltd.	–	–	–	–	Not filed
Massachusetts Financial Services Co	–	–	–	–	Not filed
Janney Montgomery Scott LLC	–	–	–	–	Not filed
Toroso Investments, LLC	–	–	–	–	Not filed
Ofi Invest Asset Management	–	–	–	–	Not filed
Wiley Bros.-Aintree Capital, LLC	–	–	–	–	Not filed
Mn Services Vermogensbeheer B.V.	–	–	–	–	Not filed
Epoch Investment Partners, Inc.	–	–	–	–	Not filed
Mediolanum International Funds Ltd	–	–	–	–	Not filed
Czech National Bank	–	–	–	–	Not filed
STRS Ohio	–	–	–	–	Not filed
Davenport & Co LLC	–	–	–	–	Not filed
Trexquant Investment LP	–	–	–	–	Not filed
Lido Advisors, LLC	–	–	–	–	Not filed
Glenmede Trust Co NA	–	–	–	–	Not filed
Bradley Foster & Sargent Inc	–	–	–	–	Not filed
Arizona State Retirement System	–	–	–	–	Not filed
BI Asset Management Fondsmaeglerselskab A/S	–	–	–	–	Not filed
Atalanta Sosnoff Capital, LLC	–	–	–	–	Not filed
Nykredit A/S	–	–	–	–	Not filed
Lazard Freres Gestion S.A.S.	–	–	–	–	Not filed
Ci Investments Inc.	–	–	–	–	Not filed
ABN AMRO Bank N.V.	–	–	–	–	Not filed
Federation des caisses Desjardins du Quebec	–	–	–	–	Not filed
Commerce Bank	–	–	–	–	Not filed
State of Michigan Retirement System	–	–	–	–	Not filed
Agf Management Ltd	–	–	–	–	Not filed
Wedbush Securities Inc	–	–	–	–	Not filed
Squarepoint Ops LLC	–	–	–	–	Not filed
Panagora Asset Management Inc	–	–	–	–	Not filed
Van Eck Associates Corp	–	–	–	–	Not filed
MAI Capital Management	–	–	–	–	Not filed
Nisa Investment Advisors, LLC	–	–	–	–	Not filed
Harvest Portfolios Group Inc.	–	–	–	–	Not filed
Kestra Advisory Services, LLC	–	–	–	–	Not filed
KCM Investment Advisors LLC	–	–	–	–	Not filed
Boston Trust Walden Corp	–	–	–	–	Not filed
Davis R M Inc	–	–	–	–	Not filed
Sanctuary Advisors, LLC	–	–	–	–	Not filed
MetLife Investment Management	–	–	–	–	Not filed
Macquarie Group Ltd	–	–	–	–	Not filed
Rakuten Investment Management, Inc.	–	–	–	–	Not filed
Lansforsakringar Fondforvaltning AB (publ)	–	–	–	–	Not filed
Omers Administration Corp	–	–	–	–	Not filed
Xponance, Inc.	–	–	–	–	Not filed
O'Shaughnessy Asset Management, LLC	–	–	–	–	Not filed
AMF Pensionsforsakring AB	–	–	–	–	Not filed
Bristol John W & Co Inc	–	–	–	–	Not filed
Bowen Hanes & Co Inc	–	–	–	–	Not filed
Employees Retirement System of Texas	–	–	–	–	Not filed
Empowered Funds, LLC	–	–	–	–	Not filed
Evercore Wealth Management, LLC	–	–	–	–	Not filed
DnB Asset Management AS	–	–	–	–	Not filed
Ieq Capital, LLC	–	–	–	–	Not filed
Commonwealth of Pennsylvania Public School Empls Retrmt Sys	–	–	–	–	Not filed
IFM Investors Pty Ltd	–	–	–	–	Not filed
Mogy Joel R Investment Counsel Inc	–	–	–	–	Not filed
Kornitzer Capital Management Inc	–	–	–	–	Not filed
Eurizon Capital SGR S.p.A.	–	–	–	–	Not filed
Clifford Swan Investment Counsel LLC	–	–	–	–	Not filed
Sequoia Financial Advisors, LLC	–	–	–	–	Not filed
Pathstone Holdings, LLC	–	–	–	–	Not filed
Nomura Holdings Inc	–	–	–	–	Not filed
I.G.Y. Ltd	–	–	–	–	Not filed
Storebrand Asset Management AS	–	–	–	–	Not filed
Oppenheimer & Co Inc	–	–	–	–	Not filed
Johnson Investment Counsel Inc	–	–	–	–	Not filed
Marsico Capital Management LLC	–	–	–	–	Not filed
Vinva Investment Management Ltd	–	–	–	–	Not filed
IMC-Chicago, LLC	–	–	–	–	Not filed
Credit Agricole S A	–	–	–	–	Not filed
QRG Capital Management, Inc.	–	–	–	–	Not filed