David Thomson has a net worth of US$ 64.6 billion, making him the wealthiest person in the media and entertainment industry. Rupert Murdoch follows in second place with $19.5 billion, Donald Newhouse ranks third with $11.0 billion, and John Malone comes in fourth with $9.8 billion. Mark Cuban ($6.2 billion) occupied the 8th position among the richest people. The value of private companies was determined using financial ratios and other comparisons with comparable publicly traded companies.