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
Defender Capital, LLC.	11,555	$10.5M	3.30%	+55+0.5%	Added
Coastline Trust Co	8,726	$7.94M	0.74%	−1,505−14.7%	Reduced
Montecito Bank & Trust	7,619	$6.94M	1.05%	−30−0.4%	Reduced
Roxbury Financial LLC	1,160	$1.06M	0.81%	−4−0.3%	Reduced
Stonebridge Financial Group, LLC	745	$678.2K	0.05%	−66−8.1%	Reduced
Hickory Point Bank & Trust	438	$398.7K	0.24%	00.0%	Unchanged
First Financial Bank - Trust Division	314	$285.8K	0.02%	−48−13.3%	Reduced
Noble Wealth Management PBC	194	$176.8K	0.08%	−9−4.4%	Reduced
Sarver Vrooman Wealth Advisors	65	$59.2K	0.03%	00.0%	Unchanged
Burkett Financial Services, LLC	4	$3.67K	0.00%	00.0%	Unchanged
BlackRock, Inc.	–	–	–	–	Not filed
Vanguard Capital Management LLC	–	–	–	–	Not filed
State Street Corp	–	–	–	–	Not filed
Invesco Ltd.	–	–	–	–	Not filed
Geode Capital Management, LLC	–	–	–	–	Not filed
Vanguard Portfolio Management LLC	–	–	–	–	Not filed
Morgan Stanley	–	–	–	–	Not filed
Bank of America Corp	–	–	–	–	Not filed
Norges Bank	–	–	–	–	Not filed
FMR LLC	–	–	–	–	Not filed
Northern Trust Corp	–	–	–	–	Not filed
Royal Bank of Canada	–	–	–	–	Not filed
JPMorgan Chase & Co	–	–	–	–	Not filed
Charles Schwab Investment Management Inc	–	–	–	–	Not filed
Goldman Sachs Group Inc	–	–	–	–	Not filed
Fisher Asset Management, LLC	–	–	–	–	Not filed
Bank of New York Mellon Corp	–	–	–	–	Not filed
Nuveen, LLC	–	–	–	–	Not filed
Wells Fargo & Company	–	–	–	–	Not filed
UBS Asset Management Americas Inc	–	–	–	–	Not filed
Capital International Investors	–	–	–	–	Not filed
Alliancebernstein L.P.	–	–	–	–	Not filed
UBS Group AG	–	–	–	–	Not filed
Legal & General Group Plc	–	–	–	–	Not filed
Vanguard Fiduciary Trust Co	–	–	–	–	Not filed
Amundi	–	–	–	–	Not filed
Jennison Associates LLC	–	–	–	–	Not filed
Price T Rowe Associates Inc	–	–	–	–	Not filed
Capital World Investors	–	–	–	–	Not filed
SG Americas Securities, LLC	–	–	–	–	Not filed
Dimensional Fund Advisors LP	–	–	–	–	Not filed
Deutsche Bank AG	–	–	–	–	Not filed
American Century Companies Inc	–	–	–	–	Not filed
Bank of Montreal	–	–	–	–	Not filed
Raymond James Financial Inc	–	–	–	–	Not filed
Ameriprise Financial Inc	–	–	–	–	Not filed
AQR Capital Management LLC	–	–	–	–	Not filed
Swiss National Bank	–	–	–	–	Not filed
HSBC Holdings PLC	–	–	–	–	Not filed
Marshall Wace, LLP	–	–	–	–	Not filed
Franklin Resources Inc	–	–	–	–	Not filed
Mitsubishi UFJ Kokusai Asset Management Co., Ltd.	–	–	–	–	Not filed
LPL Financial LLC	–	–	–	–	Not filed
Acadian Asset Management LLC	–	–	–	–	Not filed
Principal Financial Group Inc	–	–	–	–	Not filed
Sumitomo Mitsui Trust Holdings, Inc.	–	–	–	–	Not filed
California Public Employees Retirement System	–	–	–	–	Not filed
Two Sigma Investments, LP	–	–	–	–	Not filed
National Pension Service	–	–	–	–	Not filed
Vanguard Global Advisers, LLC	–	–	–	–	Not filed
Barclays PLC	–	–	–	–	Not filed
Canada Pension Plan Investment Board	–	–	–	–	Not filed
Neuberger Berman Group LLC	–	–	–	–	Not filed
D. E. Shaw & Co., Inc.	–	–	–	–	Not filed
Citigroup Inc	–	–	–	–	Not filed
Vanguard Asset Management, Ltd	–	–	–	–	Not filed
Rhumbline Advisers	–	–	–	–	Not filed
First Trust Advisors LP	–	–	–	–	Not filed
CI Private Wealth, LLC	–	–	–	–	Not filed
National Bank of Canada	–	–	–	–	Not filed
Everett Harris & Co	–	–	–	–	Not filed
TD Asset Management Inc	–	–	–	–	Not filed
BNP PARIBAS ASSET MANAGEMENT Holding S.A.	–	–	–	–	Not filed
Stifel Financial Corp	–	–	–	–	Not filed
BNP Paribas Arbitrage, SA	–	–	–	–	Not filed
California State Teachers Retirement System	–	–	–	–	Not filed
Assenagon Asset Management S.A.	–	–	–	–	Not filed
Bessemer Group Inc	–	–	–	–	Not filed
Swedbank AB	–	–	–	–	Not filed
Parnassus Investments	–	–	–	–	Not filed
The PNC Financial Services Group, Inc.	–	–	–	–	Not filed
Emerald Advisors, LLC	–	–	–	–	Not filed
Baird Financial Group, Inc.	–	–	–	–	Not filed
Envestnet Asset Management Inc	–	–	–	–	Not filed
APG Asset Management N.V.	–	–	–	–	Not filed
Russell Investments Group, Ltd.	–	–	–	–	Not filed
Blair William & Co	–	–	–	–	Not filed
US Bancorp	–	–	–	–	Not filed
Citadel Advisors LLC	–	–	–	–	Not filed
Bank Julius Baer & Co. Ltd, Zurich	–	–	–	–	Not filed
New York State Common Retirement Fund	–	–	–	–	Not filed
ProShare Advisors LLC	–	–	–	–	Not filed
Provident Trust Co	–	–	–	–	Not filed
Caisse de Depot Et Placement du Quebec	–	–	–	–	Not filed
Capital Research Global Investors	–	–	–	–	Not filed
Federated Hermes, Inc.	–	–	–	–	Not filed
HighTower Advisors, LLC	–	–	–	–	Not filed
Aviva PLC	–	–	–	–	Not filed
Manufacturers Life Insurance Company, The	–	–	–	–	Not filed
Cerity Partners LLC	–	–	–	–	Not filed