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: 44; +3 vs. Q2 2026
Shares held: 311.9K; −8.82K (−2.7%) vs. Q2 2026
Total value: $284.0M; −$16.1M (−5.3%) vs. Q2 2026
New holders: 3; 9 more added
Sold out: 0; 25 more reduced

4,220 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	4,274	$311.5B
Q4 2025	4,138	$272.0B
Q3 2025	3,941	$274.4B
Q2 2025	4,011	$302.3B
Q1 2025	3,952	$287.8B
Q4 2024	3,941	$279.6B
Q3 2024	3,590	$266.7B
Q2 2024	3,526	$258.3B
Q1 2024	3,419	$222.0B
Q4 2023	3,343	$201.0B
Q3 2023	3,077	$169.9B
Q2 2023	3,041	$162.0B
Q1 2023	2,943	$149.2B
Q4 2022	2,938	$137.2B
Q3 2022	2,825	$141.6B
Q2 2022	2,784	$143.4B
Q1 2022	2,862	$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
MOKAN Wealth Management Inc.	–	–	–	–	Not filed
Prosperitas Financial LLC	–	–	–	–	Not filed
Atlas Brown,Inc.	–	–	–	–	Not filed
Schaper Benz & Wise Investment Counsel Inc	–	–	–	–	Not filed
SageView Advisory Group, LLC	–	–	–	–	Not filed
Concord Investment Counsel Inc.	–	–	–	–	Not filed
Compass Financial Management LLC	–	–	–	–	Not filed
EverSource Wealth Advisors, LLC	–	–	–	–	Not filed
TBH Global Asset Management, LLC	–	–	–	–	Not filed
RW Investment Management LLC	–	–	–	–	Not filed
Lafayette Investments, Inc.	–	–	–	–	Not filed
Laffer Tengler Investments	–	–	–	–	Not filed
Flagship Harbor Advisors, LLC	–	–	–	–	Not filed
Capital Advisors Inc	–	–	–	–	Not filed
Harvest Investment Services, LLC	–	–	–	–	Not filed
Machina Capital S.A.S.	–	–	–	–	Not filed
Grandfield & Dodd, LLC	–	–	–	–	Not filed
Schear Investment Advisers, LLC	–	–	–	–	Not filed
Perkins Coie Trust Co	–	–	–	–	Not filed
Lebenthal Global Advisors, LLC	–	–	–	–	Not filed
Alerus Financial NA	–	–	–	–	Not filed
MONECO Advisors, LLC	–	–	–	–	Not filed
LaSalle St. Investment Advisors, LLC	–	–	–	–	Not filed
Viewpoint Investment Partners Corp	–	–	–	–	Not filed
WBH Advisory Inc	–	–	–	–	Not filed
MV Capital Management, Inc.	–	–	–	–	Not filed
Benin Management CORP	–	–	–	–	Not filed
Naviter Wealth, LLC	–	–	–	–	Not filed
First Business Financial Services, Inc.	–	–	–	–	Not filed
Modus Advisors, LLC	–	–	–	–	Not filed
Schwarz Dygos Wheeler Investment Advisors LLC	–	–	–	–	Not filed
Keating Financial Advisory Services, Inc.	–	–	–	–	Not filed
Everhart Financial Group, Inc.	–	–	–	–	Not filed
Blodgett Wealth Advisors, LLC	–	–	–	–	Not filed
SFMG, LLC	–	–	–	–	Not filed
Maloon Powers Pitre Higgins & Dennehy, LLC	–	–	–	–	Not filed
Bank Ozk	–	–	–	–	Not filed
Andrew Hill Investment Advisors, Inc.	–	–	–	–	Not filed
Guardian Investment Management	–	–	–	–	Not filed
Robbins Farley LLC	–	–	–	–	Not filed
Ninety One North America, Inc.	–	–	–	–	Not filed
SBI Securities Co., Ltd.	–	–	–	–	Not filed
Fairvoy Private Wealth, LLC	–	–	–	–	Not filed
Martin Capital Advisors, LLP	–	–	–	–	Not filed
Qtron Investments LLC	–	–	–	–	Not filed
Alan B. Lancz & Associates, Inc.	–	–	–	–	Not filed
AMG National Trust Bank	–	–	–	–	Not filed
MWA Asset Management	–	–	–	–	Not filed
Apella Capital, LLC	–	–	–	–	Not filed
Wellspring Financial Advisors, LLC	–	–	–	–	Not filed
Blume Capital Management, Inc.	–	–	–	–	Not filed
Freedom Day Solutions, LLC	–	–	–	–	Not filed
Essex Financial Services, Inc.	–	–	–	–	Not filed
Vickerman Investment Advisors, Inc.	–	–	–	–	Not filed
Evergreen Wealth Solutions, LLC	–	–	–	–	Not filed
Sheets Smith Wealth Management	–	–	–	–	Not filed
Spirit of America Management Corp	–	–	–	–	Not filed
Field & Main Bank	–	–	–	–	Not filed
International Private Wealth Advisors LLC	–	–	–	–	Not filed
Ignite Planners, LLC	–	–	–	–	Not filed
Asset Dedication, LLC	–	–	–	–	Not filed
Skye Global Management LP	–	–	–	–	Not filed
Red Cedar Investment Management, LLC	–	–	–	–	Not filed
Sivia Capital Partners, LLC	–	–	–	–	Not filed
Davidson Trust Co	–	–	–	–	Not filed
J. Derek Lewis & Associates Inc.	–	–	–	–	Not filed
DeDora Capital, Inc.	–	–	–	–	Not filed
Columbia Asset Management	–	–	–	–	Not filed
OneAscent Financial Services LLC	–	–	–	–	Not filed
Umpqua Bank	–	–	–	–	Not filed
Sumitomo Life Insurance Co	–	–	–	–	Not filed
Triad Wealth Partners, LLC	–	–	–	–	Not filed
Knights of Columbus Asset Advisors LLC	–	–	–	–	Not filed
West Branch Capital LLC	–	–	–	–	Not filed
RDA Financial Network	–	–	–	–	Not filed
RWWM, Inc.	–	–	–	–	Not filed
Norway Savings Bank	–	–	–	–	Not filed
Kepler Cheuvreux (Suisse) SA	–	–	–	–	Not filed
Cypress Capital Management LLC (WY)	–	–	–	–	Not filed
Hollencrest Capital Management	–	–	–	–	Not filed
Strategic Advisors LLC	–	–	–	–	Not filed
Schonfeld Strategic Advisors LLC	–	–	–	–	Not filed
Citizens & Northern Corp	–	–	–	–	Not filed
Sciencast Management LP	–	–	–	–	Not filed
ABLE Financial Group, LLC	–	–	–	–	Not filed
Tounjian Advisory Partners, LLC	–	–	–	–	Not filed
Equitable Trust Co	–	–	–	–	Not filed
Ambassador Advisors, LLC	–	–	–	–	Not filed
W.H. Cornerstone Investments Inc.	–	–	–	–	Not filed
Grimes & Company, Inc.	–	–	–	–	Not filed
Aire Advisors, LLC	–	–	–	–	Not filed
JGP Wealth Management, LLC	–	–	–	–	Not filed
Argus Investors' Counsel, Inc.	–	–	–	–	Not filed
Bay Colony Advisory Group, Inc d/b/a Bay Colony Advisors	–	–	–	–	Not filed
WT Wealth Management	–	–	–	–	Not filed
one8zero8, LLC	–	–	–	–	Not filed
RMB Capital Management, LLC	–	–	–	–	Not filed
Legato Capital Management LLC	–	–	–	–	Not filed
Avidian Wealth Solutions, LLC	–	–	–	–	Not filed
Garde Capital, Inc.	–	–	–	–	Not filed