| Name | Relationship | Address | Signature | Signature date | CIK |
|---|---|---|---|---|---|
| MILLERCHIP GARY | Executive Vice President | 999 LAKE DRIVE, ISSAQUAH | /s/ Alejandro Torres, Attorney-in-Fact | 13 Mar 2026 | 0001771770 |
| Type | Sym | Class | Transaction | Value $ | Shares | Change % | * Price $ | Shares After | Date | Ownership | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|
| transaction | COST | Common Stock | Tax liability | -1,154 | -6.9% | $992.23* | 15,465 | 11 Mar 2026 | Direct | F1 |
| Id | Content |
|---|---|
| F1 | This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on March 11, 2026. |