240. Lynn Schusterman
$3.2 billion self-made score: ! source: oil & Gas, investments age: 78 residence: tulsa dropout, u. of miami When her husband, Charles, died of leukemia in 2000, Lynn inherited Samson Resources, the oil company he had been building since 1971. In 2011, she sold Samson to a Kkr-led group for $7.2 billion. Much of the windfall, $2.3 billion, went to the Charles & Lynn Schusterman Foundation, devoted to Jewish charities (including Birthright Israel) and education projects in Tulsa.