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
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
Steward Partners Investment Advisory, LLC	–	–	–	–	Not filed
Badgley Phelps Wealth Managers, LLC	–	–	–	–	Not filed
Northeast Investment Management	–	–	–	–	Not filed
GF Fund Management Co. Ltd.	–	–	–	–	Not filed
PensionDanmark Pensionsforsikringsaktieselskab	–	–	–	–	Not filed
Regions Financial Corp	–	–	–	–	Not filed
ASR Vermogensbeheer N.V.	–	–	–	–	Not filed
Warren Averett Asset Management, LLC	–	–	–	–	Not filed
Fayez Sarofim & Co	–	–	–	–	Not filed
Cullen/Frost Bankers, Inc.	–	–	–	–	Not filed
Umb Bank N A	–	–	–	–	Not filed
Amalgamated Bank	–	–	–	–	Not filed
Aware Super Pty Ltd as trustee of Aware Super	–	–	–	–	Not filed
Nicholas Company, Inc.	–	–	–	–	Not filed
Flputnam Investment Management Co	–	–	–	–	Not filed
Midwest Trust Co	–	–	–	–	Not filed
Donaldson Capital Management, LLC	–	–	–	–	Not filed
Wealth Enhancement Advisory Services, LLC	–	–	–	–	Not filed
Norinchukin Bank, The	–	–	–	–	Not filed
Calamos Advisors LLC	–	–	–	–	Not filed
Peapack Gladstone Financial Corp	–	–	–	–	Not filed
United Capital Financial Advisers, LLC	–	–	–	–	Not filed
Zurich Insurance Group Ltd	–	–	–	–	Not filed
Pinnacle Financial Partners, Inc.	–	–	–	–	Not filed
Kestra Private Wealth Services, LLC	–	–	–	–	Not filed
Public Sector Pension Investment Board	–	–	–	–	Not filed
Benjamin Edwards Inc	–	–	–	–	Not filed
Susquehanna Portfolio Strategies, LLC	–	–	–	–	Not filed
Destination Wealth Management	–	–	–	–	Not filed
Gateway Investment Advisers LLC	–	–	–	–	Not filed
JustInvest LLC	–	–	–	–	Not filed
Fiera Capital Corp	–	–	–	–	Not filed
CBOE Vest Financial, LLC	–	–	–	–	Not filed
Abn Amro Investment Solutions	–	–	–	–	Not filed
Nan Shan Life Insurance Co., Ltd.	–	–	–	–	Not filed
Sapient Capital LLC	–	–	–	–	Not filed
Lord, Abbett & Co. LLC	–	–	–	–	Not filed
Crestwood Advisors Group LLC	–	–	–	–	Not filed
Capital International Inc	–	–	–	–	Not filed
Pacific Heights Asset Management LLC	–	–	–	–	Not filed
Vontobel Holding Ltd.	–	–	–	–	Not filed
Capital International Sarl	–	–	–	–	Not filed
USS Investment Management Ltd	–	–	–	–	Not filed
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main	–	–	–	–	Not filed
Hyperion Asset Management Ltd	–	–	–	–	Not filed
King Luther Capital Management Corp	–	–	–	–	Not filed
iA Global Asset Management Inc.	–	–	–	–	Not filed
Utah Retirement Systems	–	–	–	–	Not filed
Perfromance Wealth Partners, LLC	–	–	–	–	Not filed
Pinebridge Investments LLC	–	–	–	–	Not filed
Guardian Capital LP	–	–	–	–	Not filed
OP Asset Management Ltd	–	–	–	–	Not filed
Police & Firemen's Retirement System of New Jersey	–	–	–	–	Not filed
British Columbia Investment Management Corp	–	–	–	–	Not filed
Smith Group Asset Management, LLC	–	–	–	–	Not filed
Chesley Taft & Associates LLC	–	–	–	–	Not filed
Windward Capital Management Co	–	–	–	–	Not filed
Gabelli Funds LLC	–	–	–	–	Not filed
Bristol Gate Capital Partners Inc.	–	–	–	–	Not filed
Assetmark, Inc	–	–	–	–	Not filed
Sumitomo Mitsui DS Asset Management Company, Ltd	–	–	–	–	Not filed
La Banque Postale Asset Management SA	–	–	–	–	Not filed
Varma Mutual Pension Insurance Co	–	–	–	–	Not filed
Ilmarinen Mutual Pension Insurance Co	–	–	–	–	Not filed
Allworth Financial LP	–	–	–	–	Not filed
Maple Capital Management, Inc.	–	–	–	–	Not filed
Pacer Advisors, Inc.	–	–	–	–	Not filed
Baskin Financial Services Inc.	–	–	–	–	Not filed
Virginia Retirement Systems Et Al	–	–	–	–	Not filed
Wealthfront Advisers LLC	–	–	–	–	Not filed
Kimelman & Baird, LLC	–	–	–	–	Not filed
Investment House LLC	–	–	–	–	Not filed
United Super Pty Ltd in its capacity as Trustee for the Construction & Building Unions Superannuation Fund	–	–	–	–	Not filed
New York Life Investment Management LLC	–	–	–	–	Not filed
Capital Investment Counsel, Inc	–	–	–	–	Not filed
Jane Street Group, LLC	–	–	–	–	Not filed
Apollon Wealth Management, LLC	–	–	–	–	Not filed
Hosking Partners LLP	–	–	–	–	Not filed
Danica Pension, Livsforsikringsaktieselskab	–	–	–	–	Not filed
Freestone Grove Partners LP	–	–	–	–	Not filed
FIL Ltd	–	–	–	–	Not filed
Axiom Investors LLC	–	–	–	–	Not filed
Chicago Capital, LLC	–	–	–	–	Not filed
Norman Fields, Gottscho Capital Management, LLC	–	–	–	–	Not filed
Whittier Trust Co	–	–	–	–	Not filed
Ocean Capital Management, LLC	–	–	–	–	Not filed
Andra AP-fonden	–	–	–	–	Not filed
Jefferies Financial Group Inc.	–	–	–	–	Not filed
Oregon Public Employees Retirement Fund	–	–	–	–	Not filed
State of Alaska, Department of Revenue	–	–	–	–	Not filed