FORBES' List

Carlos Slim Helu : The Richest People On The Planet 2013

Net worth: $73 billion

Country: Mexico
Source of wealth: Telecom

Mexico's telecom mogul retains his spot as the world's richest man for the fourth year in a row. His net worth is up $4 billion from 2012 but is still $1 billion shy of his all-time record. A boost came from surging stock prices at his financial arm, Grupo Financiero Inbursa, and at his industrial and retail giant, Grupo Carso. This year he added soccer to the mix, buying into Mexico's Leon and Pachuca clubs and Spain's Real Oviedo.

Forbes' List : http://www.forbes.com/billionaires/list/

Mukesh Ambani : Wealthiest Indian on Forbes' rich list

► Net Worth $21.5 B As of March 2013

► Chairman, Reliance Industries
► Age: 55
► Source of Wealth: petrochemicals, oil & gas
► Country of Citizenship: India

► Education: Drop Out, Stanford University; Bachelor of Science in Engineering, University of Bombay

Mukesh Ambani's fortune dropped $1 billion though he remains India's richest person and his Reliance Industries remains country's most valuable company. Reliance, along with its partner BP, will be investing $5 billion in KG-D6, the country's largest offshore gas field where output has sharply declined and which has been the subject of scrutiny by a federal auditor. Despite hectic lobbying with the federal oil ministry, it has not yet secured a price increase for gas. Ambani is also preparing to roll out 4G services for which he may reportedly lease towers from Reliance Infratel, run by his once-estranged sibling Anil. Mukesh and his wife Nita throw lavish parties, the latest being for British prime minister David Cameron on his recent trip to Mumbai.