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.

The bellwether retailer reported higher-than-expected sales in its latest quarter and upgraded its forecast for the rest of the year.

Walmart on Tuesday raised its annual sales and profit forecast for the third consecutive time, as people bought more groceries and merchandise, a sign the world's largest retailer continues to gain market share ahead of the holidays.

Walmart said U.S. sales rose during the most recent quarter as shoppers bought more groceries, home goods and toys, a sign that spending is off to a steady start for the holiday shopping season. The retail giant also raised its sales and profit estimates for the year.

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,

Walmart Inc. boosted its outlook for the year on strong demand from US consumers searching for value, driving shares up 4% in premarket trading in New York.