The billionaire who created Cablevision also owned Madison Square Garden and the Knicks and Rangers sports teams.

Dolan amassed a fortune worth $5.6 billion as of the end of 2021, according to the Bloomberg Billionaires Index.

By Richard Goldstein Charles F. Dolan, who founded HBO, merged a group of small Long Island cable TV systems into a network he called Cablevision and amassed a fortune building an innovative ...

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Charles F. Dolan, the pioneer and businessman who founded HBO in the early 1970s, merged a group of Long Island cable TV ...