Optimism for the pre-Christmas sales caused shares in the retail giant to jump more than 2 per cent, adding $2.4bn to Bezos' personal fortune and bringing his total net worth to $100.3bn. On Friday alone, Bezos made nearly $2.4 billion.
The increase, to $100.3bn, is thanks in part to the clamour for Black Friday deals - Amazon shares have gone up 5% this week alone. Courtesy the flurry in online sales on Thanksgiving and Black Friday, Amazon's stock jumped 18 percent as compared to past year.
Gates is the second wealthiest man, according to Bloomberg's Billionaire's Index, with a net worth estimated earlier this year of $88.9 billion.More news: Rohingya Refugees in Bangladesh: Return to start in two months
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Gates is believed to be the only other person to reach $100 billion.
Mr Bezos started Amazon in his basement in Seattle 22 years ago, after he quit his job as a hedge fund manager in NY. I completes a remarkable climb up the rankings by Bezos who began this year as the world's fourth richest man - which is still nothing to be ashamed about - but overtook Bill Gates as the richest back in October.
Gates, who now has a net worth of $86.8 billion, is estimated to have had a net worth of $150 billion had he not given so much of his fortune to charity. He had given away around $500m of Amazon shares since 2002, according to analysis of Form 4 filings, while Gates gifted $4.6bn in a single donation back in August to an unknown benefactor.
But as the company continues to grow, Mr Bezos has seen his wealth increase by $32.6bn in the previous year alone.