Billionaire Gautam Adani's wealth has zoomed 48 per cent in the 12 months to May 27, 2015 - the day after the NDA government took office - to an estimated $8.1 billion , the highest gain in net worth among the seven Indians figuring in the Bloomberg Billionaires Index. In terms of rise in wealth, Adani is followed by Dilip Shanghvi of Sun Pharma, HCL's Shiv Nadar, Arcelor-Mittal chief LN Mittal and Wipro's Azim Premji.