According to the Bloomberg Billionaires Index, Jeff Bezos’s net worth is about $55bn more than Microsoft Corp co-founder Bill Gates, the world’s second-richest person.
Bezos, 54, has also topped Gates in inflation-adjusted terms. The $100bn mark that Gates hit briefly in 1999 at the height of the dot-com boom would be worth about $149bn in today’s dollars.
That makes the Amazon chief executive officer richer than anyone else on earth since at least 1982, when Forbes published its inaugural wealth ranking.
Bezos crossed the threshold as Amazon was preparing to kick off its 36-hour summer sales event, Prime Day, which got off to a rocky start as glitches struck the firm’s website and mobile app.
Shares of the company, which had climbed to a record $1,841.95 earlier Monday, pared gains on the news, closing up 0.5 per cent at $1,822.49.
It is believed that Bezos’s stay above $150 billion may be short-lived as the stock slipped below $1,800 in extended trading.
His net worth has soared by $52bn this year, which is more than the entire fortune of Alibaba Group Holding Ltd’s Chairman Jack Ma, Asia’s wealthiest person.
It also puts Bezos’s personal fortune within spitting distance of the $151.5bn controlled by the Walton family, the world’s richest dynasty.