Per CNN, Dolan was also a founder and chairman emeritus of The Lustgarten Foundation, which conducts pancreatic cancer research. According to Forbes, Dolan and his family have a net worth of 5.4 billion at the time of his death.

Billionaire businessman Charles Dolan, who founded HBO and Cablevision and whose family owns Madison Square Garden and a number of New York City sports teams, died on Saturday—he was 98. Dolan created Cablevision Systems Corporation in 1973,