Company: COST
Filing Date: 2025-06-27
Form Type: 11-K
Source: 0000909832-25-000038
Chunk: 6

Company: COSTCO WHOLESALE CORP /NEW
Filing Date: 2025-06-27
Form: 11-K
Chunk 6
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Effective for participants employed on or after August 1, 2024, vesting in any form of employer contributions are 100% vested and nonforfeitable. Prior to this date, the Plan had a 5-year graded vesting schedule.

(e)

#### Forfeitures
Forfeited amounts are used to reduce employer contributions, funded subsequent to each year. Forfeitures during 2024 and forfeiture balances as of December 31, 2024, and 2023, were immaterial. Forfeitures are restored to a participant’s account if within five years the participant is re-hired and repays the vested account balance distributed upon termination.

(f)

#### Investment Options
Participants may invest funds in their account in the Plan's available investment options. Participants may transfer amounts between investment options daily, subject to certain trading restrictions. Before 2016, participants could invest 100% of their account in Costco stock; starting January 2016, the Plan has a 50% limit on investment in Costco stock, applied prospectively.

Amounts may be temporarily invested in a cash account prior to investment in the Plan’s investment accounts. See Notes 2, 3 and 4 for additional information regarding the Plan's investments.

(g)

#### Distributions
Upon termination of employment, total disability, reaching age 59-1/2 or death, a participant (or participant's beneficiary in the case of death) can request a full, partial or, in certain circumstances, installment or rollover distribution for the vested portion of the account. Participants are also eligible to withdraw a portion of the salary-deferral contribution account in the event of certain financial hardships.

Dividends on the Company's stock are reinvested in the participant’s Company stock account unless a distribution is requested by the participant. These dividends are reported on a gross basis, with total dividends reported as "Dividends" and the amounts distributed reported as "Distributions to participants and other" in the statement of changes in net assets available for benefits.

(h)

#### Notes Receivable from Participants
A participant may borrow between $1,000 and the lesser of $50,000 or 45% of their vested account balance, reduced by the highest outstanding loan balance in the previous 12 months minus the outstanding balance of all loans on the date on which the loan is made, provided this amount is available in the participant's pre-tax salary deferral and rollover accounts. Loans are repaid through payroll deductions over a period ranging up to four years