Costco Wholesale
COST · NASDAQ
Who owns COST
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 28.1% of COST’s shares.
- Vanguard Capital Management, LLC6.5%
- BlackRock Institutional Trust Company, N.A.4.8%
- State Street Investment Management (US)4.1%
- Invesco Capital Management LLC3.0%
- Next 6 largest institutions9.6%
- All other shareholders71.9%
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Capital Management, LLC | 28.98M | 6.53% |
| BlackRock Institutional Trust Company, N.A. | 21.47M | 4.84% |
| State Street Investment Management (US) | 18.38M | 4.15% |
| Invesco Capital Management LLC | 13.48M | 3.04% |
| Geode Capital Management, L.L.C. | 10.63M | 2.40% |
| Vanguard Portfolio Management, LLC | 10.40M | 2.35% |
| Norges Bank Investment Management (NBIM) | 6.47M | 1.46% |
| Fidelity Management & Research Company LLC | 5.79M | 1.31% |
| Morgan Stanley Smith Barney LLC | 4.96M | 1.12% |
| BlackRock Asset Management Ireland Limited | 4.16M | 0.94% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 14.13M | 3.19% |
| Vanguard 500 Index Fund | 11.64M | 2.63% |
| Invesco QQQ Trust | 9.54M | 2.15% |
| iShares Core S&P 500 ETF | 5.92M | 1.33% |
| Statens Pensjonsfond Utland | 5.76M | 1.30% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $1.90M (2 trades) of COST on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Wilcox William Richard | Sale | 1.10K | $1.05M |
| Wilcox William Richard | Tax withholding | 1.94K | $1.75M |
| Wilcox William Richard | Award | 4.13K | — |
| Jones Teresa A. | Tax withholding | 1.46K | $1.32M |
| Jones Teresa A. | Award | 4.13K | — |
| Frates Caton | Tax withholding | 1.65K | $1.49M |
| Frates Caton | Award | 4.55K | — |
| Riel Pierre | Tax withholding | 1.56K | $1.41M |
| Riel Pierre | Award | 4.55K | — |
| Adamo Claudine | Tax withholding | 917 | $827.48K |
Congressional trades
Disclosed by members of Congress over the last 12 months
| Member | Type | Amount | Traded |
|---|---|---|---|
| Richard W. AllenHouse | Sale | $1K–$15K | Sep 18, 2026 |
| Rich McCormickHouse | Sale | $1K–$15K | Jul 30, 2026 |
| Dan Newhouse | Purchase | $1K–$15K | Jul 10, 2026 |
| Alan ArmstrongSenator | Purchase | $1K–$15K | Mar 27, 2026 |
| Gil CisnerosHouse | Purchase | $1K–$15K | Jan 30, 2026 |
| Markwayne MullinSenator | Purchase | $15K–$50K | Dec 29, 2025 |
| Gil CisnerosHouse | Sale | $1K–$15K | Dec 24, 2025 |
| Ro KhannaHouse | Purchase | $15K–$50K | Nov 10, 2025 |
| Rich McCormickHouse | Purchase | $1K–$15K | Nov 5, 2025 |
| Ro KhannaHouse | Purchase | $1K–$15K | Nov 3, 2025 |
Short interest
Settled Sep 30, 2026
- Shares short
- 7.33M
- Days to cover
- 2.74
- % of shares outstanding
- 1.65%
- Average daily volume
- 2.68M
- Change since last report
- −0.5%
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