The weird event took place recently at a high time when the e-commerce platforms have come under public scrutiny for their apathy over delivering the right product.
He said he would have more time for side projects, including his space exploration company Blue Origin, his philanthropic initiatives, and overseeing The Washington Post.
The worth of the 49-year-old South African-born US business magnate is $186bn at 10.15 am in New York on Wednesday and with the new surge, Musk is $1.5bn richer than Bezos.
The major acquisition from one of the significant industries has come days after the US E-commerce giant Amazon launched an online drug service in India.
Named as "Amazon Food", the service has been launched in Bengaluru, in the selected areas of the city and the duopoly market has got an additional player that would make the race tougher.