Mukesh Ambani chairs and runs $88 billion (revenue) oil and gas giant Reliance Industries, among India's most valuable companies.
Reliance Jio has signed on more than 340 million customers by offering free domestic voice calls, dirt-cheap data services and virtually free smartphones, said the report.
The next Indian on the 34th annual list -- veteran Mumbai investor Radhakishan Damani who is touted as India's retail king after the March 2017 IPO of his supermarket chain DMart Â- is at a distant 65th position with a net worth of $16.6 billion.
Damani got into retailing in 2002 with one store in suburban Mumbai and has been unstoppable since. His property portfolio includes the 156-room Radisson Blu Resort in Alibag and a popular beach-front getaway close to Mumbai, according to the report.
At 114th position, HCL Technologies Founder Shiv Nadar is worth $12.4 billion. One of India's leading philanthropists, Nadar has donated $662 million to his Shiv Nadar Foundation.
While Hinduja brothers are at 116th position with $12.2 billion net worth. Srichand and Gopichand live in London and Prakash resides in Monaco while the youngest sibling Ashok oversees their Indian interests from Mumbai.
At 138th position, Uday Kotak is worth $10.7 billion. His Kotak Mahindra Bank is now among India's top four banks in the private sector, boosted by its 2014 acquisition of ING Bank's Indian operations.
In January this year, the bank reached an agreement with the Reserve Bank of India over the issue of reducing Kotak's stake in the bank to 26 per cent.
Telecom tycoon Sunil Mittal is at 154th position with $9.5 billion net worth. Bharti Airtel today is among India's largest mobile phone operators with more than 418 million customers.
Others in the latest list are Cyrus Poonawalla who is founder of Serum Institute of India (at 161th position with $9.2 billion net worth), Gautam Adani at 162th position with $9.2 billion net worth and steel tycoon Lakshmi Mittal with $8.9 billion net worth at 170th spot, among others.