#4 Mukesh Ambani - $29 billion

Mukesh Ambani is the chairman, managing director and the largest shareholder of Reliance Industries, India's largest private sector company and a Fortune 500 Company. His personal stake in Reliance Industries is 48%. His wealth is US$ 43 billion as of March 2007, making him the world's 5th richest person and the second richest person in India. Mukesh and younger brother Anil are sons of the late founder of Reliance Industries, Dhirubhai Ambani.

Mukesh holds a Bachelor of Chemical Engineering from the University of Mumbai Department of Chemical Technology (UDCT), which is now known as University of Mumbai, Institute of Chemical Technology (UICT). He began the MBA program at Stanford Business School, but failed to finish. He dropped out after his first year in order assist in father's ongoing efforts to build the Patalganga petrochemical plant.

Mukesh Ambani has set up the largest and most complex information and communications technology initiative in the world in the form of Reliance Infocomm Limited. Covering more than 1,100 towns and cities across India, Reliance Infocomm offers the full range of voice, data, video and value added services, on the strength of 80,000 kilometers of optic fibre-based terabit infrastructure, at the lowest entry cost and services cost anywhere in the world. However, Reliance Infocom now is under ADAG (Anil Dhirubhai Ambani Group) post the brothers' split.