The 62-year self-made Indian billionaire expanded his empire through deals and the backing of Indian Prime Minister Narendra Modi, according to Forbes. Modi has been accused by opposition leader Rahul Gandhi for assisting the Adani Group in securing contracts in Sri Lanka, India and Australia.

His companies’ stocks plunged up to 20% in value Thursday after he was indicted by U.S. prosecutors on charges that he duped investors in a massive solar energy project in India by concealing that it was being facilitated by bribes.