The Costco digital strategy 2026 is producing results that are reshaping the retail industry's understanding of what a warehouse club can accomplish in the digital space. In Q2 fiscal year 2026, digitally-enabled comparable sales grew 22.6 percent year over year — more than three times the pace of overall comparable sales growth of 9.1 percent. App visits surged 63 percent. E-commerce site traffic rose 32 percent. Mobile app engagement climbed 45 percent. And AI-powered perso