COSTCO WHOLESALE CORP /NEW (COST) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-03-11 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: COSTCO WHOLESALE CORP /NEW (COST) CIK: 0000909832 --- Reporting Owner --- Name: MILLERCHIP GARY CIK: 0001771770 Role: Officer (Executive Vice President) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-03-11 | Code: F (Payment of exercise/tax) Shares: -1,154.017 | Price: $992.23 Total Value: $1,145,050.29 Shares Owned After: 15,465.301 | Ownership: D (Direct) Footnotes: [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 March 11, 2026. --- Footnotes (Complete Index) --- 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 March 11, 2026. --- Signature --- /s/ /s/ Alejandro Torres, Attorney-in-Fact (2026-03-13)