Four Indian-origin entrepreneurs have been named to Forbes' '40 Under 40' list of the world's richest self-made billionaires, collectively holding over $11 billion. Ankur Jain, founder of Bilt Rewards, ranks 19th with $3.4 billion. Zerodha co-founder Nikhil Kamath is the only Indian-based entrepreneur on the list at 20th with $3.3 billion. Adarsh Hiremath and Surya Midha also made the list, jointly ranking 27th.