Which company do you think will reach a market value of $1 trillion first?
Amazon's shares hit $1,858.88 yesterday, giving the company a stock market value of $902 billion. The stock slipped from there, finishing the week at $1,813.70 and a market value of $880 billion.
Amazon stock has nearly doubled in 2018, and has grown 123,000 percent since its NASDAQ listing in 1997.
The calculations for Apple and Amazon's market capitalisations are based on the number of shares outstanding in their March-quarter reports.More news: Rory hits back at Butch - I'm no robot
Amazon reports its results on July 26 and Apple, which has been reducing its share count through buybacks, reports its June-quarter results on July 31.
Amazon already dislodged Microsoft Corp as the No 3 USA company by market capitalisation in February.
As the online retailer expands into grocery retail through its acquisition of Whole Foods Market a year ago, and with more businesses move their IT departments onto the cloud, Amazon's stock price has been red hot, recently trading at 111 times expected earnings, compared to more-profitable - but slower growing - Apple's valuation of 15 times earnings.
Amazon was recently trading at 111 times expected earnings, compared to 15 times earnings in the case of Apple which is more profitable but is growing at a slower pace, Reuters noted.More news: Remains of suspected serial killer Bruce McArthur's 8th victim identified
The energy sector slipped 0.49 percent, but pared losses on a surprise build in USA crude inventories.
Jeff Bezos is best known as the founder and CEO of online giant Amazon.
Initially, it was launched as an online book store working out of Bezo's garage in Seattle but rapidly grew to include a variety of goods and services.
Both companies have the advantage of not being reliant on one revenue source. He is now the only person in the world valued over $100 billion, richer than the world's second wealthiest man Bill Gates by $58 billion.
He has been married since 1994 and has four children.More news: Anthony Joshua: 'I'd rather lose than be a drugs cheat'