Company: COST
Filing Date: 2025-12-04
Form Type: DEF 14A
Source: 0000909832-25-000159
Chunk: 35

Company: COSTCO WHOLESALE CORP /NEW
Filing Date: 2025-12-04
Form: DEF 14A
Chunk 35
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 2025 is included in the "Non-Equity Incentive Plan Compensation" column and corresponding footnote of the Summary Compensation Table on page 19 . See description under "Compensation Discussion and Analysis - 2025 Compensation of the Chief Executive Officer" and "2025 Compensation of Other Named Executive Officers."

(2) The number of performance-based RSUs granted during fiscal 2025, subject to attainment of the performance criteria described under “Compensation Discussion and Analysis – Equity Compensation.” After the end of fiscal 2025, the Compensation Committee determined that the performance criteria had been exceeded and the awards were earned. The earned awards vested 20% on October 22, 2025, and will vest 20% on October 22 for the following four years, with acceleration of vesting for long service.

(3) The grant-date fair value of RSU awards granted, computed as described in footnote 3 to the Summary Compensation Table.

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#### OUTSTANDING EQUITY AWARDS AT FISCAL 2025 YEAR-END
The following table sets forth information regarding unvested stock awards held at August 31, 2025.

| Name               |     |                  |     | Type of Award    |     |            |     | Stock Award Grant 
 Date              |     |        |     |     Number of Shares or 
 Units of Stock Unvested 
   at Fiscal Year-End1,2 |     |            |     | Market Value of Shares or 
   Units of Stock Unvested 
   at Fiscal Year-End ($)3 |
| Ron M. Vachris     |     |                  |     | Performance RSUs |     |            |     | 10/22/2024        |     |        |     |                  13,834 |     |            |     |                13,049,889 |
|                    |     | Performance RSUs |     |                  |     | 10/22/2023 |     |                   |     | 15,319 |     |                         |     | 14,450,719 |     |                           |
| Gary Millerchip    |     |                  |     | Performance RSUs |     |            |     | 10/22/2024        |     |        |     |                   6,268 |     |            |     |                 5,912,730 |
|                    |     | Performance RSUs |     |                  |     |