The company issued second-quarter guidance with net sales expected to increase 3.5 percent to 4.5 percent, but maintained its full-year guidance of net sales to increase between 3 percent and 4 percent from last year, and for adjusted earnings per share to range from $2.50 to $2.60.

In an earnings call on Thursday, CEO Doug McMillon spoke about price changes that he says will hit in the coming weeks.

Walmart will have to start raising prices later this month due to the high cost of tariffs, executives said on Thursday, even as the retailing giant's U.S. comparable sales surpassed expectations in the first quarter.