Thirteen Houstonians make the list of Forbes 400 richest Americans

RELATED STORIES: Houston, other Texas cities rank high in Forbes job outlook | The most expensive homes in Houston | 10 Houston jobs that could earn you a six-figure salary | Forbes names top Hip-Hop earners | Check out job listings and job-hunting tips

Houston added one more resident to Forbes’ annual 400 Richest People in America list .

Pipeline mogul Richard Kinder, 66, ranked as the highest Houstonian with an estimated net worth of $6.4 billion. Tilman Fertitta, 55, made the list for the first time at 298 with an estimated worth of $1.6 billion.

Of the 13 on the list, they had a combine net worth of $46.4 billion, or roughly $3.57 billion a piece. Last year, the 12 Houstonians’ average net worth was $3.1 billion.

Ten Houstonians increased their net worth. Kinder saw the biggest rise as his net worth grew by more than $3 billion.

Bill Gates is again No. 1 with $66 billion. He’s followed by Berkshire Hathaway’s Warren Buffett with $46 billion and Oracle founder Larry Ellison with $41 billion. Hedge fund manager George Soros, who joined the Top 10 for the first time, dropped to 15th with an estimated worth of  $19 billion, a lose of nearly $3 billion.

The list also featured five billionaires in the top 20 who don’t have a college degree.

Gates, who dropped out of Harvard, leads the list of billionaire drop outs. Ellison, who founded Oracle, dropped out of the University of Chicago and the University of Illinois at Urbana.

Here are some other notable college drop outs: Mark Zuckerberg, Harvard; Sheldon Adelson, City College of New York; Michael Dell, University of Texas at Austin.

For the full list go to: www.forbes.com/forbes400.