Gangwal is ranked 321 on the list with a net worth of $2.2 billion. He is an aviation entrepreneur, who co-founded InterGlobe Aviation, which operates budget airline IndiGo, that is India's largest by market share.
US resident Gangwal owns more than 40 per cent of the company and currently serves as a board member, Forbes said. Kapoor, who ranks 335 on the list with a net worth of $2.1 billion, is the chairman of two drug companies - Akorn, which specializes in "difficult-to-manufacture" prescription drugs and Insys Therapeutics, which produces an opioid for cancer patients, Forbes added. Shriram ranks 361 on the list with a net worth of $1.9 billion.
According to Forbes, Shriram, who was one of Google's early backers, has sold of most of his stock but remains on the board of its parent company, Alphabet. Since 2000, he has been investing in young technology startups through his firm, Sherpalo Ventures.
Sriram's portfolio includes online card and invitation service Paperless Post, web and mobile app testing service Optimizely, and mobile advertising company Inmobi.