Mukesh Chatter's company, Nexabit, created a terabit router, a kind of digital traffic cop on steroids.
Azim Premji, for years India's richest resident, was unseated by Mukesh and Anil Ambani.
The defendants, including Mr. Singh's brother Mukesh, face charges including kidnapping, rape and murder.
Indian billionaires like Mukesh Ambani bought franchises as did the flamboyant tycoon Vijay Mallya.
Anil took Mukesh to court for allegedly trying to renege on the gas supply terms.
Anil's haranguing has elicited no response from Mukesh, who has maintained a stoic silence so far.
Reliance Industries chairman Mukesh Ambani plans to move into 570-foot building, called Antila, this month.
FORBES: Mukesh Ambani's Skyscraper-Mansion is the World's Most Expensive Home
Mukesh shunned a tuxedo for an Indian Nehru jacket with Nita wearing an exquisite Indian sari.
Brothers Anil and Mukesh Ambani of Reliance Industries jumped to 65th this year from 123rd in 2003.
Two others are worth hundreds of millions: Mukesh Chatter of Nexabit and Jeong Kim of Yurie Systems.
Over the next few days, the police in Delhi detained Mukesh Singh, Mr. Gupta, and the juvenile.
Mukesh reportedly also wants to get into power and financial services, sectors where Anil already has a presence.
Mr. Singh, like the four other men, including his brother Mukesh, faced charges including kidnapping, rape and murder.
Got family's interests in telecom, power and financial services following bitter parting with older sibling Mukesh in 2005.
India is a close second with 17 including its two richest citizens, Mukesh Ambani and Lakshmi Mittal.
Spat with brother continues: dispute with Mukesh over gas supply agreement for his new power plant now in court.
Ambani's U.S.-educated sons, Anil and Mukesh, effectively run the company now, and they look forward to a new India.
Still feuding with brother Mukesh: since 2005 split, has taken him to court.
The five accused have been named as Ram Singh, his brother Mukesh, Pawan Gupta, Vinay Sharma and Akshay Thakur.
Reliance Jio Infocomm is the telecom venture of billionaire Mukesh Ambani-led Reliance Industries, India's third-largest company by market capitalization.
Five months after co-hosting their mother's 75th birthday bash, billionaire brothers Mukesh and Anil Ambani have resumed their bitter battle.
The Reliance Fresh chain's grocery stores, a venture of billionaire Mukesh Ambani's Reliance Group, were stoned when they first opened.
It seems Anil is in the mood to do more deals both with Mukesh and others, according to reports this week.
Still the spat continues with one of Anil's companies recently taking Mukesh's Reliance Industries to court over a gas supply agreement.
Mukesh is ranked seventh on the Forbes list of the world's wealthiest people, while his younger sibling is ranked 34th.
On a balmy November night in Mumbai, Mukesh Ambani and his wife Nita welcomed guests into their newly completed 27-story home.
Maybe Chesapeake can interest Indian billionaire Mukesh Ambani, whose Reliance Industries already made two deals in the Marcellus this year.
FORBES: Billionaire Makes $400 Million On Marcellus Gas Stake
The most celebrated of rivalries in the Indian corporate world in recent times, was that between the Ambani brothers Mukesh and Anil.
One such firm, Reliance Industries, is on the prowl, though its proprietor, Mukesh Ambani, is thought to be impressively stingy about deals.
Mukesh Ambani, India's richest man, was born in what is now Yemen.
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