Medical doctor's Manipal Education & Medical Group operates a network of 6 colleges, including 4 overseas, in Malaysia, Antigua, Dubai and Nepal. It also runs 16 hospitals and is due to open one more in Bangalore this year. Looking to expand, Pai is reportedly eyeing South Indian diagnostics chain Medall Healthcare. Investors in Manipal include tech billionaire Azim Premji (No. 3) and private equity firm TPG. Microsoft CEO Satya Nadella is a graduate of the Manipal Institute of Technology in Manipal.