Billionaire Gautam Adani has reclaimed the title of Asia's richest person, surpassing Reliance Industries chairman Mukesh Ambani, according to the Bloomberg Billionaires Index. As of 6 PM on Saturday, Mr Adani, the chairman of Adani Group, holds the 11th spot on the index with a net worth of $111 billion, compared to Mr Ambani's $109 billion.