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
Man Group plc	–	–	–	–	Not filed
Arrowstreet Capital, Limited Partnership	–	–	–	–	Not filed
Rockefeller Capital Management L.P.	–	–	–	–	Not filed
Williams Jones Wealth Management, LLC.	–	–	–	–	Not filed
Mariner, LLC	–	–	–	–	Not filed
1832 Asset Management L.P.	–	–	–	–	Not filed
Voya Investment Management LLC	–	–	–	–	Not filed
Jupiter Topco LLC	–	–	–	–	Not filed
Adage Capital Partners GP, L.L.C.	–	–	–	–	Not filed
Chevy Chase Trust Holdings, Inc.	–	–	–	–	Not filed
Millennium Management LLC	–	–	–	–	Not filed
Capitolis Liquid Global Markets LLC	–	–	–	–	Not filed
State Board of Administration of Florida Retirement System	–	–	–	–	Not filed
Schroder Investment Management Group	–	–	–	–	Not filed
Public Employees Retirement Association of Colorado	–	–	–	–	Not filed
Susquehanna International Group, LLP	–	–	–	–	Not filed
Quantinno Capital Management LP	–	–	–	–	Not filed
Colony Group, LLC	–	–	–	–	Not filed
Healthcare of Ontario Pension Plan Trust Fund	–	–	–	–	Not filed
Scotia Capital Inc.	–	–	–	–	Not filed
Prudential Financial Inc	–	–	–	–	Not filed
Danske Bank A/S	–	–	–	–	Not filed
Victory Capital Management Inc	–	–	–	–	Not filed
Standard Life Aberdeen plc	–	–	–	–	Not filed
Robeco Institutional Asset Management B.V.	–	–	–	–	Not filed
Commonwealth Equity Services, LLC	–	–	–	–	Not filed
Great West Life Assurance Co	–	–	–	–	Not filed
New York State Teachers Retirement System	–	–	–	–	Not filed
Universal- Beteiligungs- und Servicegesellschaft mbH	–	–	–	–	Not filed
NEOS Investment Management LLC	–	–	–	–	Not filed
TD Waterhouse Canada Inc.	–	–	–	–	Not filed
Fifth Third Bancorp	–	–	–	–	Not filed
Keybank National Association	–	–	–	–	Not filed
HRT Financial LP	–	–	–	–	Not filed
Pictet Asset Management Holding SA	–	–	–	–	Not filed
AustralianSuper Pty Ltd	–	–	–	–	Not filed
Natixis Advisors, L.P.	–	–	–	–	Not filed
Allianz Asset Management GmbH	–	–	–	–	Not filed
Chilton Investment Co LLC	–	–	–	–	Not filed
Creative Planning	–	–	–	–	Not filed
Ninety One UK Ltd	–	–	–	–	Not filed
Advisor Group Holdings, Inc.	–	–	–	–	Not filed
Balyasny Asset Management LLC	–	–	–	–	Not filed
DekaBank Deutsche Girozentrale	–	–	–	–	Not filed
CIBC World Markets Inc.	–	–	–	–	Not filed
Jones Financial Companies LLLP	–	–	–	–	Not filed
Mirae Asset Global Investments Co., Ltd.	–	–	–	–	Not filed
Qube Research & Technologies Ltd	–	–	–	–	Not filed
Haverford Trust Co	–	–	–	–	Not filed
Korea Investment CORP	–	–	–	–	Not filed
Mirae Asset Global ETFs Holdings Ltd.	–	–	–	–	Not filed
Bank of Nova Scotia	–	–	–	–	Not filed
PFA Pension, Forsikringsaktieselskab	–	–	–	–	Not filed
Ensign Peak Advisors, Inc	–	–	–	–	Not filed
Truist Financial Corp	–	–	–	–	Not filed
Brown Advisory Inc	–	–	–	–	Not filed
Cetera Investment Advisers	–	–	–	–	Not filed
Mitsubishi UFJ Trust & Banking Corp	–	–	–	–	Not filed
State of Wisconsin Investment Board	–	–	–	–	Not filed
Capital Counsel LLC	–	–	–	–	Not filed
Steadfast Capital Management LP	–	–	–	–	Not filed
Loring Wolcott & Coolidge Fiduciary Advisors LLP	–	–	–	–	Not filed
Royal London Asset Management Ltd	–	–	–	–	Not filed
Brown Brothers Harriman & Co	–	–	–	–	Not filed
Asset Management One Co.,Ltd.	–	–	–	–	Not filed
Vanguard Investments Australia, Ltd.	–	–	–	–	Not filed
Mackenzie Financial Corp	–	–	–	–	Not filed
Nomura Asset Management Co Ltd	–	–	–	–	Not filed
Greenbrier Partners Capital Management, LLC	–	–	–	–	Not filed
Alphinity Investment Management Pty Ltd	–	–	–	–	Not filed
Huntington National Bank	–	–	–	–	Not filed
Zurcher Kantonalbank (Zurich Cantonalbank)	–	–	–	–	Not filed
Rathbone Brothers plc	–	–	–	–	Not filed
Sarasin & Partners LLP	–	–	–	–	Not filed
Congress Asset Management Co	–	–	–	–	Not filed
Captrust Financial Advisors	–	–	–	–	Not filed
Toronto Dominion Bank	–	–	–	–	Not filed
Worldquant Millennium Advisors LLC	–	–	–	–	Not filed
William Blair Investment Management, LLC	–	–	–	–	Not filed
CIBC Bancorp USA Inc.	–	–	–	–	Not filed
Wellington Management Group LLP	–	–	–	–	Not filed
M&T Bank Corp	–	–	–	–	Not filed
Banque Transatlantique SA	–	–	–	–	Not filed
CIBC Asset Management Inc	–	–	–	–	Not filed
Empower Advisory Group, LLC	–	–	–	–	Not filed
Lazard Asset Management LLC	–	–	–	–	Not filed
Retirement Systems of Alabama	–	–	–	–	Not filed
SEI Investments Co	–	–	–	–	Not filed
Northwestern Mutual Wealth Management Co	–	–	–	–	Not filed
Treasurer of the State of North Carolina	–	–	–	–	Not filed
D.A. Davidson & Co.	–	–	–	–	Not filed
Douglass Winthrop Advisors, LLC	–	–	–	–	Not filed
ING Groep NV	–	–	–	–	Not filed
Actiam N.V.	–	–	–	–	Not filed
Allspring Global Investments Holdings, LLC	–	–	–	–	Not filed
KLP Kapitalforvaltning AS	–	–	–	–	Not filed
Connor, Clark & Lunn Investment Management Ltd.	–	–	–	–	Not filed
Nomura Asset Management International Inc.	–	–	–	–	Not filed
Loomis Sayles & Co L P	–	–	–	–	Not filed
Public Employees Retirement System of Ohio	–	–	–	–	Not filed