The biggest family fortunes in the United States have largely been built through businesses that have existed for generations rather than overnight success stories. Many of these companies remain privately owned or are still heavily controlled by founding families, allowing wealth to be passed down while expanding into new markets.

The descendants of Walmart’s founders Sam and Bud Walton are now worth half a trillion dollars—three times as much as America’s second wealthiest family.

The biggest family fortunes in the United States have largely been built through businesses that have existed for generations rather than overnight success stories. Many of these…

America's wealthiest families, led by the Waltons with a staggering $520 billion, continue to dominate the economic landscape. Their fortunes, built over generations in sectors…