$COST · Costco Wholesale Corporation

Costco Wholesale Corporation filed a Form 4 on October 26, 2026, reporting changes in beneficial ownership for Roland Michael Vachris, the company’s President and CEO. The filing states that on October 22, 2026, Vachris acquired 13,973 shares of common stock through a restricted stock unit grant. This grant was originally made on October 22, 2025, subject to fiscal 2026 performance conditions, which the Compensation Committee determined had been satisfied. The earned awards vest 20% on the first anniversary of the grant date and an additional 20% in each of the following four years based on continued employment.

On the same day, three separate transactions were reported as disposals of common stock totaling 3,655.614 shares at a price of $1,018.21 per share. These disposals were withholdings by the company to cover taxes in connection with the vesting of previously granted restricted stock units. The price reflects the closing market price of Costco common stock on Nasdaq on October 22, 2026.

Following these reported transactions, Vachris directly beneficially owned 62,575.444 shares of Costco common stock.