Net Worth: $17.5 billion As of March 2012

Source: media, inherited

Age: 54 , Citizenship: Canada

Residence: Toronto, Canada

Marital Status: Divorced, Children: 3

Education: MA, University of Cambridge; MA, Selwyn College

Canadian media magnate, David Thomson, has a net worth of $17.5 billion as of March 2012, according to FORBES. He is the chairman of media powerhouse Thomson Reuters, which was founded by grandfather, Roy, in 1934. With brother, Peter, serves as co-chair of family's investment concern, Woodbridge. David serves as co-chair of tje Thomson family's investment vehicle, Woodbridge, with his brother, Peter. Thomson's net worth fell $5.5 billion since 2011 due to an almost 30 percent drop year-over-year in Thomson Reuters' share price.

A voracious art collector, Thomson maintains a substantial and diverse art collection, which is reported to include pieces from Pablo Picasso and the world's top collection of John Constable.