Is Walmart Making a Play to Win Market Share From Amazon? Here's What Investors Need to Know

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Walmart (NYSE: WMT) may be the largest company in the U.S. by sales, but it keeps making its top line bigger. For a while, it looked like competitor Amazon (NASDAQ: AMZN) was poised to overtake it, but Walmart is just too big and doing too well to catch. It's a battle of true titans, as both companies boast more than $600 billion in revenues over the last four quarters.

Walmart delivered another outstanding quarterly report last week, and the growth drivers behind the results might surprise you. Two factors helping it along are e-commerce growth and an improving ability to attract higher-income customers -- areas that have not historically been among its strong points. But Walmart has been making strategic changes in its e-commerce business, and it's taking off. Can Walmart flip its business and challenge Amazon in e-commerce?

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Late to the e-commerce party

Walmart was late to the e-commerce boom, so it missed out on some early opportunities to dominate it. As the largest retailer in the U.S., it could have had an edge. However, it has been developing a strong e-commerce business over the past few years. It was already well positioned when the pandemic struck and customers switched to online shopping, and although it's way behind Amazon, it's still in second place.

In its fiscal 2025 third quarter, which ended Oct. 31, total sales were up 5.5% year over year, but e-commerce sales were up 27%. In the U.S., sales were up 5.3% while e-commerce sales were up 22%. Management called out several growth drivers in the report: in-store order fulfillment, in-store pickup, advertising, and marketplace.

In its international segment, e-commerce revenues increased 43% year over year, driven by in-store order fulfillment, in-store pickup, and marketplace. Meanwhile, for its Sam's Club subsidiary -- a warehouse membership chain similar to Costco Wholesale -- e-commerce sales increased 26%, a gain notably powered by in-store order fulfillment and pickup.

Management attributed much of that performance improvement to its growing ability to attract higher-income customers through strategies such as expanding its product lines in areas that appeal to them. It said that population accounted for 75% of Walmart's market share gains in the quarter.

Walmart's e-commerce business isn't profitable yet, but it has the money to keep scaling it until it is -- and management is confident that it will get there.