The retailer saw share gains in new shoppers across income levels mainly led by upper-income households, which make more than $100,000 in annual income, Walmart officials said during an earnings call on Tuesday. Walmart in a previous earnings call had also highlighted the rise in its higher income shoppers.

Walmart’s business is surging. Customers making more than $100,000 a year are fueling the growth. Walmart’s US sales at stores open for at least a year grew 5.3% last quarter compared with the year prior,