Bill Gates stay on top Forbes US richest man list

Bill Gates is the richest man in the United States for the 20th straight year and has made a comeback as the richest man in the world.
Forbes released its annual list of the top 400 richest Americans.
Microsoft Corp co-founder Bill Gates remains America’s richest man, taking the top spot on the list for the 20th straight year, with a net worth of $US72 billion ($A77.
27 billion).
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Investor Warren Buffett, the head of Berkshire Hathaway, keeps second place with $US58.5 billion, while Oracle co-founder Larry Ellison stayed third with $US41 billion.
Brothers Charles and David Koch, co-owners of Koch Industries, stay tied for fourth with $US36 billion each.
Wal-Mart heirs Christy Walton, Jim Walton, Alice Walton and S. Robson Walton took the next three spots, with holdings ranging from $US33.3 billion to $US35.4 billion.
New York City Mayor Michael Bloomberg, the founder of the eponymous financial information company, rounds out the top 10 with $US31 billion.
