Despite having enough money to retire early and enjoy life, the millionaire continued to build wealth. In 1995, he invested in a company with fellow Indiana alum Todd Wagner and started AudioNet.
Since achieving billionaire status, Mark Cuban has continued to make money. He bought the Dallas Mavericks for $285 billion from Ross Perot Jr.
In addition, Cuban is an early investor in the $4 billion SPAC banking app, Dave, and the owner of film distributor Magnolia Pictures.