Key Takeaways COST posted 5.8% comparable sales growth in June, with net sales climbing 8% to $26.44 billion. E-commerce sales surged 11.5% in June, supported by logistics expansion and flexible payment options. Membership fee income remains robust with 92.7% renewal rates and executive memberships driving growth.Costco Wholesale Corporation’s (COST) June sales results provide fresh insights into the retail giant’s performance. Known for its steady growth and leadership in the warehouse club space, Costco ...