Company: COST
Filing Date: 2025-06-27
Form Type: 11-K
Source: 0000909832-25-000038
Chunk: 10

Company: COSTCO WHOLESALE CORP /NEW
Filing Date: 2025-06-27
Form: 11-K
Chunk 10
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 1 inputs. Mutual funds held by the Plan are open-end mutual funds that are registered with the U.S. Securities and Exchange Commission. Separately managed accounts largely consist of common stock, money market securities, and a collective trust as of December 31, 2024, and 2023.

Common commingled trust funds : The valuation techniques used to measure the fair value of common commingled trust funds are based on quoted market prices, such as quoted net asset values (NAV) published by the fund as supported in an active market. Plan participant transactions of investment or withdrawals may occur on a daily basis in these trusts. These assets are valued using Level 1 inputs.

The tables below present information regarding investments that are measured at fair value on a recurring basis and indicate the level within the hierarchy reflecting the valuation techniques utilized to determine fair value as of December 31, 2024, and 2023.

| December 31, 2024:                        |     | Level 1    
 (in 000's) |            |
|:------------------------------------------|:----|:-----------|-----------:|
| Investments, at fair value:               |     |            |            |
| Costco Wholesale Corporation common stock |     | $          | 21,006,481 |
| Common commingled trust funds             |     |            | 12,039,144 |
| Separately managed accounts               |     |            |  2,629,978 |
| Registered investment company funds       |     |            |  2,353,270 |
| Total investments in fair value hierarchy |     | $          | 38,028,873 |

| December 31, 2023:                        |     | Level 1    
 (in 000's) |            |
|:------------------------------------------|:----|:-----------|-----------:|
| Investments, at fair value:               |     |            |            |
| Costco Wholesale Corporation common stock |     | $          | 15,977,459 |
| Common commingled trust funds             |     |            | 10,080,126 |
| Separately managed accounts               |     |            |  2,491,563 |
| Registered investment company funds       |     |            |  1,886,587 |
| Total investments in fair value hierarchy |     | $          | 30,435,735 |

(5)

#### Plan Termination
Although it has no present intent to do so, the Company has the