$COST · Costco Wholesale Corporation

Costco Wholesale Corporation executive vice president Javier Polit filed a Form 4 reporting changes in beneficial ownership dated October 22, 2026. The filing shows he acquired 4,129 shares of common stock through a restricted stock unit grant that was originally made on October 22, 2025. The grant was subject to fiscal 2026 performance conditions, which the Compensation Committee of the Board of Directors determined had been satisfied. The earned awards vest one-third on the first anniversary of the grant date, with an additional one-third vesting in each of the following two years based on continued employment.

On the same date, the company withheld shares to cover taxes in connection with the vesting of previously granted restricted stock units. Four separate withholding transactions disposed of a combined 1,571.616 shares at a price of $1,018.21 per share, which represented the closing market price on Nasdaq on October 22, 2026. After these reported transactions, Polit directly owned 12,746.976 shares of Costco common stock.