Paris Hilton's grandfather will donate over 97% of his $2.3 billion fortune to his father’s charity foundation. Barron Hilton has decided to bequeath 97 per cent of his estimated $2.3 billion fortune to the Conrad N. Hilton Foundation, officials reported Wednesday. He has already handed over $1.2-billion, with an estimated $1.1 billion to follow his death. The charity’ CEO Steven Hilton said, "This generous donation means that the work of the foundation will continue and expand for many years to come."