The fourth richest Indian today, with a net worth of about $13.5 billion, Anil Ambani is chairman of Reliance Communications, Reliance Capital, Reliance Energy and Reliance Natural Resources Limited.
Before the Reliance empire split, he was vice chairman and managing director of Reliance Industries Limited. The Reliance group was founded by his late father Dhirubhai Ambani.
Anil was born on June 4, 1959. He joined Reliance in 1983, two years after his elder brother Mukesh, as co-chief executive officer. He is credited with leading India's foray into overseas capital markets with international public offerings of global depositary receipts, convertibles and bonds. He also directed RIL's efforts to raise $2 billion from global markets.
Anil was elected as an independent Member of the Rajya Sabha with the support of the Samajwadi Party, but resigned on March 25, 2006.
Ambani who was once ridiculed for being overweight at a shareholder's meeting is now a fitness freak and runs the Mumbai marathon regularly.
He has a bachelor's degree in Science from the University of Bombay and a master's in Business Administration from The Wharton School at the University of Pennsylvania.
He is married to former Bollywood actress Tina Munim.
Photograph: Prakash Singh/AFP/Getty Images