Company: COST
Filing Date: 2025-12-04
Form Type: DEF 14A
Source: 0000909832-25-000159
Chunk: 36

Company: COSTCO WHOLESALE CORP /NEW
Filing Date: 2025-12-04
Form: DEF 14A
Chunk 36
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 of taxes associated with the vesting.

<div align='center'>21</div>

#### FISCAL 2025 NON-QUALIFIED DEFERRED COMPENSATION
The following table provides information relating to the non-qualified deferred compensation plan. See footnote 5 to the Summary Compensation Table for additional information about the plan.

| Name               |     |      Executive 
  Contributions 
 in Last Fiscal 
      Year ($)1 |     |               Registrant 
            Contributions 
 in Last Fiscal Year ($)2 |     |                Aggregate 
                 Earnings 
 in Last Fiscal Year ($)3 |     |         Aggregate 
      Withdrawals/ 
 Distributions ($) |     |                 Aggregate 
                Balance at 
 Last Fiscal Year-End ($)4 |
| Ron M. Vachris     |     |        104,508 |     |                    5,000 |     |                  144,162 |     |          -290,176 |     |                 1,688,366 |
| Gary Millerchip    |     |              — |     |                        — |     |                        — |     |                 — |     |                         — |
| Russ D. Miller     |     |        437,989 |     |                    5,000 |     |                   74,008 |     |          -214,201 |     |                 1,102,864 |
| Pierre Riel        |     |         10,000 |     |                    5,000 |     |                      998 |     |                 — |     |                    15,998 |
| Javier Polit       |     |              — |     |                        — |     |                        — |     |                 — |     |                         — |
| Richard A. Galanti |     |        177,058 |     |                    5,000 |     |                1,574,114 |     |          -724,573 |     |                18,777,522 |

_______________________

(1) Amounts were included in “Salary,” “Bonus,” or "Non-Equity Incentive Plan Compensation" in the Summary Compensation Table.

(2) Amounts were included in "All Other Compensation" in the Summary Compensation Table.

(3) Amounts representing interest on the Named Executive Officer's balance that is "above market" (greater than 120% of the applicable federal long-term rate) are included in "Change in Pension Value and Nonqualified Deferred Compensation Earnings" in the Summary Compensation Table