Mary Agnes Wilderotter - Oct 22, 2025 Form 4 Insider Report for COSTCO WHOLESALE CORP /NEW (COST)

Role
Director
Signature
/s/ Alejandro Torres, Attorney-in-Fact
Stock symbol
COST
Transactions as of
Oct 22, 2025
Transactions value $
$0
Form type
4
Date filed
10/24/2025, 06:24 PM
Previous filing
Sep 2, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Wilderotter Mary Agnes Director 999 LAKE DRIVE, ISSAQUAH /s/ Alejandro Torres, Attorney-in-Fact 2025-10-24 0001180610

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction COST Common Stock Award $0 +286 +9.8% $0.00 3.2K Oct 22, 2025 Direct F1, F2, F3
holding COST Common Stock 9.75K Oct 22, 2025 By GRAT-1 F3
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Grant of Restricted Stock Units. Vests one-third on October 22, 2026, and one-third annually on October 22 for the following two years.
F2 Not applicable. Grant of Restricted Stock Units.
F3 On July 21, 2025, the reporting person contributed 9,752 shares of Costco common stock to a grantor retained annuity trust (GRAT-1) of which the reporting person is the sole grantor, trustee and annuity beneficiary.

Remarks:

Exhibit 24: Power of Attorney provided herewith.