Forbes ranked the wealthiest families in the U.S. and found a record 54 multi-generational clans worth at least $10 billion.
Still no family comes close to Walmart’s Waltons; already the richest family, they were also the biggest gainers by far, nearly doubling their fortune in two years to more than a half-trillion dollars.
Read more about America's richest families:
Illustration: Robert Bruno for Forbes
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