Avenue Supermarts, which is doing business as D-Mart, founder Radhakishan Damani has now become the 2nd richest Indian after Reliance Industries Ltd chairman Mukesh Ambani, with a net worth of $17.8 billion. He has left behind many heavyweights to acquire the coveted spot including the likes of philanthropist Shiv Nadar, banker Uday Kotak, and industrialists Gautam Adani and Lakshmi Mittal.