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Forbes Updates List of Richest Americans, Top Names Unchanged

Daniel Acker/Bloomberg via Getty Images(NEW YORK) -- Microsoft co-founder Bill Gates remains the richest person in America, retaining the top ranking in the Forbes 400 list for the 20th year in a row.

The list, calculated as of September, places Gates' net worth at $72 billion.

Warren Buffett, chairman and CEO of Berkshire Hathaway, remains second on the list with a net worth of $58.5 billion, while Oracle Corp. co-founder Larry Ellison retained his spot in third place with $41 billion.

Charles and David Koch, co-owners of Koch Industries, stayed tied for fourth with a net worth of about $36 billion each.

Forbes says that the 400 people on their list increased their wealth from last year, with a combined net worth of $2 trillion, compared to $1.7 trillion a year ago. The $2 trillion figure is also the highest combined worth of the people on Forbes' list ever.

Forbes attributed the growth to strong stock and real estate markets, pointing out that the cutoff point was so high that 61 American billionaires did not make the list.

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