Top nine Indian tech billionaires including Azim Premji, Shiv Nadar, NR Narayana Murthy, Kris Gopalakrishnan, Nandan Nilekani, Sachin Bansal, Binny Bansal, K Dinesh and SD Shibulal are worth $35.9 billion, according to Forbes' list of World's billionaires. Wipro Chairman Azim Premji leads the pack with $15 billion net worth, followed by HCL's Shiv Nadar and NR Narayana Murthy of Infosys.