Costco reports 21.5% YoY sales growth, 4.1% membership rise

Costco reported 21.5% year-over-year sales growth in Q3 2026, with 4.1% membership increase and 7% higher adjusted fee. Renewal rates stood at 92.2% in North America and 89.7% globally. Online registration drew younger members, boosting digital sales. The company's buy online, in-store pickup and third-party delivery partnerships drove growth.