Amazon’s share of U.S. retail spending jumped 7.6% in Q2 2025, more than doubling in six years, whereas Walmart has remained flat at 7 to 8%.Amazon’s U.S. retail sales grew 9.5% year over year, outpacing Walmart’s 4.6% growth and signaling a structural shift in U.S. retail leadership.The story of American retail over the past quarter-century has largely been a two-horse race.By completing this form, you agree to receive marketing communications from PYMNTS and to the sharing of your information with our spo ...