Saudi Arabia's national energy company, Aramco, is widely believed to be worth much more than either Amazon or Apple. For context, the entire USA stock market - the sum of all publicly traded American companies, including Amazon - hit $30 trillion in January.
Amazon briefly joined the $1 trillion club Tuesday, becoming the second US company to reach the milestone market cap in as many months. Microsoft now has a market cap of $854.5 billion, while Alphabet is close behind at $840.3 billion.
Bezos' riches have largely come through his ownership of 16.3% of Amazon's outstanding stock.
The company's blowout success has made its founder and CEO, Jeff Bezos, No. 1 on Forbes' billionaires list this year. The 54-year-old is now worth more than $166 billion, according to Bloomberg's billionaires index on Tuesday.
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Minneapolis police spokesman John Elder said an investigation was ongoing and declined to provide details of the arrest . Liu grew up in a poor part of eastern China before attending the prestigious Renmin University in Beijing .
Apple reached the same milestone in early August. Amazon Web Services provides cloud computing services to companies and government, and Amazon's advertising division makes billions by selling ads to companies that want their products to show up when shoppers search on the site. The tech juggernaut isn't alone anymore, however, as Amazon has reached $1 trillion valuation.
"This year marks the 20th anniversary of our first shareholder letter, and our core values and approach remain unchanged", Bezos said in his 2017 letter to shareholders in March.
The firm is expected to account for roughly half of all online shopping sales in the U.S. this year - and almost 5 percent of the country's overall retail market, according to research firm eMarketer.
- CBS News' Jillian Harding contributed reporting.