Mukesh Ambani has topped the Forbes list of India's 100 richest people for 13th year in a row with $88.7 billion wealth. He's followed by Gautam Adani with $25.2 billion wealth and HCL Technologies Founder Shiv Nadar with $20.4 billion. DMart's Founder Radhakishan Damani is 4th richest with $15.4 billion wealth, followed by Hinduja Brothers with $12.8 billion wealth.