Amazon sales soared over the Christmas season, rising 21% from the previous year, in sharp contrast to weakness reported by other retailers.
The e-commerce juggernaut said it earned $87bn (£66bn) in sales in the last three months of 2019, well ahead of analyst expectations.
The news sent the firm’s share price up more than 10% in after-hours trade.
If prices hold it would return Amazon’s market valuation to above $1tn, joining Microsoft, Apple and Google.
Amazon’s growth has come as traditional stores and malls suffer, with a decline in foot traffic blamed in part on online shopping.
By contrast, Amazon said it earned $3.3bn in profit in its last quarter, up from $3bn a year ago. That was despite spending heavily on high speed delivery services for its Prime members.
Boss Jeff Bezos said the firm now had more than 150 million Prime accounts globally – up 50% from its last disclosure in 2018. Members get free delivery and access to Amazon’s trove of video, among other perks.