Nithin Kamath, aged 44, is the fourth youngest Indian billionaire on the latest Forbes list, with a net worth of $4.8 billion, while his brother Nikhil Kamath, aged 37, ranks as the youngest Indian billionaire, with a net worth of $3.1 billion. Kamath, the CEO of Zerodha, no longer actively trades but remains passionate about capital markets, contributing to the startup ecosystem through Rainmatter fintech fund and the Rainmatter Foundation for societal welfare.