Radhakishan Damani, the founder of Avenue Supermarts and a low-profile investor, has made his way into India's richest 20 club with a blockbuster listing of his company that runs D-Mart retail chain. With the listing at a premium of over 114 per cent, the shares controlled by 61-year-old Damani, including through his family members and investment firms, are now worth a stellar USD 5.1 billion.