Amazon.com

RANK2

A company this big shouldn’t be able to grow this fast—but Amazon’s 21% revenue growth in 2019, to $281 billion, is the reason the Seattle company has catapulted to No. 2 on the Fortune 500. It's now ranked behind only its greatest rival and the world’s biggest retailer: Walmart. For years a money loser, Amazon earned $11.6 billion in profit on more than $280 billion in annual sales. Key drivers for the so-called Everything Store’s growth is that its consumer bundle keeps expanding. Its Prime delivery and entertainment subscription service counts more than 150 million global customers. As in prior years, the company’s Amazon Web Services unit outpaced the company as a whole, growing revenue at a 37% clip to $35 billion.