The Ziff Family – $14.4 Billion

Never heard of the Ziff family? You’re not alone! While some of the richest families in America house famous faces, like Mark Cuban or Jack Nicholson, some are a little more quiet with their wealth. Like William Ziff Sr., the man who create Ziff Davis, the publishing company behind PC Magazine and Car and Driver. In 1994, he sold the company for a whopping $1.4 billion, eventually generously giving much of that to his family upon his death.

Afterward, three of Ziff Sr.’s grandsons, Dirk, Robert and Daniel Ziff, started an investment firm together, Ziff Brother Investments. Now worth an incredible $14.5 billion, the brothers have invested in a variety of high-tech communications companies.