Costco Wholesale Corporation reported August net sales of $23.70 billion for the four weeks ended August 30, 2026, up 9.9% from $21.56 billion a year earlier. Net sales for the 16-week fourth quarter reached $93.9 billion, an 11.3% increase from $84.4 billion, while fiscal-year sales rose 10.2% to $297.3 billion from $269.9 billion. Total-company comparable sales increased 8.4% for August, 9.4% for the fourth quarter and 8.4% for the fiscal year. Digitally-enabled comparable sales rose 17.9%, 19.5% and 20.9%, respectively. Excluding gasoline-price and foreign-exchange effects, total-company comparable sales increased 5.4% for August, 6.7% for the quarter and 6.6% for the year. Costco said the later timing of Labor Day in the U.S. and Canada reduced August total and comparable sales by slightly less than 75 basis points. The company operates 939 warehouses and e-commerce sites across nine markets. Costco also said certain statements in the release and its prerecorded message are forward-looking and subject to risks including economic conditions, competition, regulation, consumer spending, security breaches, labor costs, geopolitical conditions and other matters disclosed in its Securities and Exchange Commission filings.