Claudine Adamo - Oct 22, 2025 Form 4 Insider Report for COSTCO WHOLESALE CORP /NEW (COST)

Role
Executive Vice President
Signature
/s/ Alejandro Torres, Attorney-in-Fact
Stock symbol
COST
Transactions as of
Oct 22, 2025
Transactions value $
-$3,191,995
Form type
4
Date filed
10/24/2025, 07:12 PM
Previous filing
Sep 12, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Adamo Claudine Executive Vice President 999 LAKE DRIVE, ISSAQUAH /s/ Alejandro Torres, Attorney-in-Fact 2025-10-24 0001916124

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction COST Common Stock Tax liability -$115K -122 -1.19% $944.68 10.1K Oct 22, 2025 Direct F1
transaction COST Common Stock Tax liability -$91.6K -96.9 -0.96% $944.68 10K Oct 22, 2025 Direct F1
transaction COST Common Stock Tax liability -$188K -199 -1.98% $944.68 9.84K Oct 22, 2025 Direct F1
transaction COST Common Stock Tax liability -$167K -177 -1.8% $944.68 9.66K Oct 22, 2025 Direct F1
transaction COST Common Stock Tax liability -$104K -111 -1.14% $944.68 9.55K Oct 22, 2025 Direct F1
transaction COST Common Stock Sale -$2.53M -2.7K -28.27% $935.68 6.85K Oct 24, 2025 Direct
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 This transaction is a withholding by the Company for taxes in connection with the vesting of previously granted restricted stock units. The price represents the closing market price of Costco common stock on Nasdaq on October 22, 2025.