Net Worth: $24.7BAge: 84Country/Territory: united StatesSource: Candy, Pet FoodIndustries: Food & Beverages
John and his siblings Jacqueline and Forrest Jr. (died July 2016) inherited stakes in the candy firm Mars Inc. when their father died in 1999. He and Jacqueline each own an estimated one-third of the company. His late brother Forrest Jr.’s four daughters own the rest. The $35 billion (sales) candy company was founded by John’s grandfather, Frank, in 1911. Mars is also a big name in pet care, with brands including Pedigree and Whiskas, as well as food like Uncle Ben’s rice.