13. Lukas Walton
Age: 32
Net Worth: $17.8 Billion
Grandson of Sam Walton, the founder of Walmart, Lukas Walton received approximately one-third of his father’s, John Walton, estate when he died in a plane crash in 2005.
Lukas also owns stakes in Walmart, First Solar and Arvest Bank, however, he does not work for any of these companies, choosing to invest silently instead.
Lukas Walton has been very generous with his fortune, donating at least $149 million to his family’s namesake foundation.