Costco Wholesale Corp (COST)
Who owns Costco Wholesale Corp (COST)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.4% of the shares are freely tradable; institutional investors hold 73.8%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 7.88 | 34,947,040 | -0.4 | 03/31/2026 |
| Vanguard Capital Management, LLC | 6.50 | 28,847,448 | +0.0 | 03/31/2026 |
| State Street Corp | 4.09 | 18,152,232 | +0.0 | 03/31/2026 |
| Amvescap Plc. | 3.07 | 13,629,248 | -4.6 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 2.41 | 10,705,635 | +0.0 | 03/31/2026 |
| Geode Capital Management, LLC | 2.40 | 10,659,224 | +2.6 | 03/31/2026 |
| Morgan Stanley - Brokerage Accounts | 2.23 | 9,898,711 | +3.9 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Morn Total Stk Mkt Idx Investor | 3.18 | 14,086,325 | -0.3 | 06/30/2026 |
| Vanguard 500 Index Investor | 2.60 | 11,522,771 | -0.9 | 06/30/2026 |
| Invesco QQQ Trust | 2.11 | 9,347,036 | +0.0 | 07/29/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 10. Jul 2026 | Raikes Jeffrey S | Director | Other | 5,249 | 0.00 | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character.
View all insider transactions →Data as of: August 3, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.