Charles Dolan, who helped pioneer pay television, is dead at 98, his family confirms. He founded HBO and Cablevision, among other ventures.

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.

The Cablevision founder helped usher in a new era for television. He also acquired sports and entertainment properties including MSG and the New York Knicks.