Indian-origin Rama Raju Mantena, who is a prominent figure in the US pharmaceutical industry, has a net worth of $20 million (₹178.52 crore), as per reports. Mantena is the Chairman and CEO of Ingenus Pharmaceuticals, which has a valuation of $35 million (₹312.43 crore), reports added. His daughter Netra recently tied the knot with entrepreneur Vamsi Gadiraju in Udaipur.