Jonathan Gray was born in New York, New York, United States. Jonathan Gray is #947 in List Billionaires People In The World. Jonathan Gray started at asset manager Blackstone Group fresh out of college in 1992 and has risen to head the firm's vaunted real estate group. Gray oversees a $104 billion global real estate portfolio, which accounts for more than a quarter of Blackstone's total assets. He orchestrated the $26 billion buyout of Hilton hotels in 2007 then took it public again in 2013; the IPO was then the biggest ever for a hotel firm. Gray is considered a potential successor to Blackstone founder and CEO Steve Schwarzman. Gray has given more than $30 million to his alma mater, the University of Pennsylvania, for cancer research.