Costco

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-03-12 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: COSTCO WHOLESALE CORP /NEW (COST) CIK: 0000909832 --- Reporting Owner --- Name: George Sarah Catherine CIK: 0002112687 Role: Officer (Executive Vice President) --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-03-12 | Code: I (Discretionary (intra-plan)) Shares: -642.1252 | Price: $991.21 Total Value: $636,482.78 Shares Owned After: 0 | Ownership: I (Indirect) | Nature: By 401(k) Footnotes: [F1] Reflects a transaction by which the reporting person through an intra-plan transfer disposed of the 642.1252 shares of common stock previously reported as beneficially owned under Costco's 401(k) plan, pursuant to the company's policy prohibiting executive officers from participating in the common stock fund. --- Holdings --- [Holding #1] Security: Common Stock Ownership: D (Direct) --- Footnotes (Complete Index) --- F1: Reflects a transaction by which the reporting person through an intra-plan transfer disposed of the 642.1252 shares of common stock previously reported as beneficially owned under Costco's 401(k) plan, pursuant to the company's policy prohibiting executive officers from participating in the common stock fund. --- Signature --- /s/ /s/ Alejandro Torres, Attorney-in-Fact (2026-03-13)