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: 20; +1 vs. Q2 2026
Shares held: 46.8K; +1.94K (+4.3%) vs. Q2 2026
Total value: $42.6M; +$677.8K (+1.6%) vs. Q2 2026
New holders: 1; 4 more added
Sold out: 0; 10 more reduced

4,242 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
Rafferty Asset Management, LLC	–	–	–	–	Not filed
Sanibel Captiva Trust Company, Inc.	–	–	–	–	Not filed
Nippon Life Global Investors Americas, Inc.	–	–	–	–	Not filed
Elo Mutual Pension Insurance Co	–	–	–	–	Not filed
Thrivent Financial for Lutherans	–	–	–	–	Not filed
Beacon Pointe Advisors, LLC	–	–	–	–	Not filed
Howard Capital Management Group, LLC	–	–	–	–	Not filed
Groupe la Francaise	–	–	–	–	Not filed
Shelton Capital Management	–	–	–	–	Not filed
Clarity Financial LLC	–	–	–	–	Not filed
Invictus Private Wealth, LLC	–	–	–	–	Not filed
Trust Co of Vermont	–	–	–	–	Not filed
Pittenger & Anderson Inc	–	–	–	–	Not filed
J. Safra Sarasin Holding AG	–	–	–	–	Not filed
Candriam Luxembourg S.C.A.	–	–	–	–	Not filed
BSN Capital Partners Ltd	–	–	–	–	Not filed
Louisiana State Employees Retirement System	–	–	–	–	Not filed
Unio Capital LLC	–	–	–	–	Not filed
Retirement Planning Group	–	–	–	–	Not filed
Stock Yards Bank & Trust Co	–	–	–	–	Not filed
Spears Abacus Advisors LLC	–	–	–	–	Not filed
Stratos Wealth Partners, LTD.	–	–	–	–	Not filed
Clearstead Advisors, LLC	–	–	–	–	Not filed
Klingenstein Fields & Co LP	–	–	–	–	Not filed
Adviser Investments LLC	–	–	–	–	Not filed
Dakota Wealth Management	–	–	–	–	Not filed
Motley Fool Asset Management LLC	–	–	–	–	Not filed
Asset Advisors Investment Management, LLC	–	–	–	–	Not filed
Illinois Municipal Retirement Fund	–	–	–	–	Not filed
UniSuper Management Pty Ltd	–	–	–	–	Not filed
Yousif Capital Management, LLC	–	–	–	–	Not filed
Advisors Capital Management, LLC	–	–	–	–	Not filed
Parallel Advisors, LLC	–	–	–	–	Not filed
Main Street Research LLC	–	–	–	–	Not filed
Teachers Retirement System of the State of Kentucky	–	–	–	–	Not filed
Violich Capital Management, Inc.	–	–	–	–	Not filed
Allstate Corp	–	–	–	–	Not filed
Trillium Asset Management, LLC	–	–	–	–	Not filed
Mutual of America Capital Management LLC	–	–	–	–	Not filed
Cumberland Partners Ltd	–	–	–	–	Not filed
Jupiter Asset Management Ltd	–	–	–	–	Not filed
Baltimore-Washington Financial Advisors, Inc.	–	–	–	–	Not filed
Clark Capital Management Group, Inc.	–	–	–	–	Not filed
Nordea Investment Management AB	–	–	–	–	Not filed
Foster Dykema Cabot & Partners, LLC	–	–	–	–	Not filed
Merit Financial Group, LLC	–	–	–	–	Not filed
Bridges Investment Management Inc	–	–	–	–	Not filed
Prime Capital Investment Advisors, LLC	–	–	–	–	Not filed
Equitable Holdings, Inc.	–	–	–	–	Not filed
Mesirow Financial Investment Management, Inc.	–	–	–	–	Not filed
Harvest Fund Management Co., Ltd	–	–	–	–	Not filed
Worldly Partners Management, LLC	–	–	–	–	Not filed
Meitav Dash Investments Ltd	–	–	–	–	Not filed
Exchange Traded Concepts, LLC	–	–	–	–	Not filed
Vident Advisory, LLC	–	–	–	–	Not filed
Raiffeisen Bank International AG	–	–	–	–	Not filed
YHB Investment Advisors, Inc.	–	–	–	–	Not filed
Zacks Investment Management	–	–	–	–	Not filed
Capital International Ltd	–	–	–	–	Not filed
Chilton Capital Management LLC	–	–	–	–	Not filed
Union Bancaire Privee, UBP SA	–	–	–	–	Not filed
Adell Harriman & Carpenter Inc	–	–	–	–	Not filed
Howard Capital Management Inc.	–	–	–	–	Not filed
Fiduciary Trust Co	–	–	–	–	Not filed
Kames Capital plc	–	–	–	–	Not filed
Bailard, Inc.	–	–	–	–	Not filed
Randolph Co Inc	–	–	–	–	Not filed
Freestone Capital Holdings, LLC	–	–	–	–	Not filed
Marco Investment Management LLC	–	–	–	–	Not filed
MUFG Securities EMEA plc	–	–	–	–	Not filed
Optiver Holding B.V.	–	–	–	–	Not filed
Investment Management Corp of Ontario	–	–	–	–	Not filed
Cresset Asset Management, LLC	–	–	–	–	Not filed
Markel Group Inc.SuperinvestorMarkel Group	–	–	–	–	Not filed
Advisors Asset Management, Inc.	–	–	–	–	Not filed
Cadinha & Co LLC	–	–	–	–	Not filed
Annex Advisory Services, LLC	–	–	–	–	Not filed
Citizens Financial Group Inc	–	–	–	–	Not filed
PBU - The Pension Fund of Early Childhood & Youth Educators	–	–	–	–	Not filed
Park National Corp	–	–	–	–	Not filed
Highland Capital Management, LLC	–	–	–	–	Not filed
Trajan Wealth LLC	–	–	–	–	Not filed
Barlow Wealth Partners, Inc.	–	–	–	–	Not filed
Pinnacle Associates Ltd	–	–	–	–	Not filed
united american securities inc. (d/b/a uas asset management)	–	–	–	–	Not filed
NewEdge Wealth, LLC	–	–	–	–	Not filed
Atlantic Union Bankshares Corp	–	–	–	–	Not filed
Tokio Marine Asset Management Co Ltd	–	–	–	–	Not filed
Martingale Asset Management L P	–	–	–	–	Not filed
Daymark Wealth Partners, LLC	–	–	–	–	Not filed
ExodusPoint Capital Management, LP	–	–	–	–	Not filed
Birch Hill Investment Advisors LLC	–	–	–	–	Not filed
Blue Chip Partners, Inc.	–	–	–	–	Not filed
SRS Capital Advisors, Inc.	–	–	–	–	Not filed
Mizuho Securities USA LLC	–	–	–	–	Not filed
Integrated Wealth Concepts LLC	–	–	–	–	Not filed
Charter Trust Co	–	–	–	–	Not filed
Gulf International Bank (UK) Ltd	–	–	–	–	Not filed
Cornerstone Advisors, LLC	–	–	–	–	Not filed
AE Wealth Management LLC	–	–	–	–	Not filed