Form 4
Barbre Tiffany Marie
Principal Accounting Officer
- Filed
- 10/26/26
- Trade dates
- 10/22/26
- Period of report
- 10/22/26
- 10b5-1 box
- Not checked
- Accession number
- 0000909832-26-000105
Table I: shares of stock
| Line | Security | Trade date | Shares | Price | Value | Owned after | Ownership | Notes |
|---|---|---|---|---|---|---|---|---|
| GrantedLine 1 · code A | Common Stock | 10/22/26 | 1,965Acquired | $0 | — No price on filing | 7,120.448 | Direct | F1, F2 |
| Withheld for taxesLine 2 · code F | Common Stock | 10/22/26 | 90.23Disposed | $1,018.21 | $91,873.09 | 7,030.218 | Direct | F3 |
| Withheld for taxesLine 3 · code F | Common Stock | 10/22/26 | 93.948Disposed | $1,018.21 | $95,658.79 | 6,936.27 | Direct | F3 |
| Withheld for taxesLine 4 · code F | Common Stock | 10/22/26 | 101.536Disposed | $1,018.21 | $103,384.97 | 6,834.734 | Direct | F3 |
| Withheld for taxesLine 5 · code F | Common Stock | 10/22/26 | 84.603Disposed | $1,018.21 | $86,143.62 | 6,750.131 | Direct | F3 |
| Withheld for taxesLine 6 · code F | Common Stock | 10/22/26 | 166.451Disposed | $1,018.21 | $169,482.07 | 6,583.68 | Direct | F3 |
| HoldsLine 7 | Common Stock | — | — | — | — | 2.1788 | Indirect: By 401(k) | — |
Footnotes
- F1
Grant of Restricted Stock Units. Vests one-fifth on October 22, 2027, and one-fifth annually on October 22 for the following four years. In addition, under the 2019 Stock Incentive Plan, this grant is eligible for accelerated vesting upon the anniversary of the reporting person's 25th, 30th and 35th years of service.
- F2
Not applicable. Grant of Restricted Stock Units.
- F3
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 October 22, 2026.