Jim Walton

Rank on Forbes.com 2006 World’s Billionaires List: 17
Net Worth: $15.9 billion
Vehicles Owned: 2002 Dodge Dakota Pickup (pictured above); 2000 Acura Integra; 1998 Mitsubishi Montero Sport; 1999 Chevrolet Silverado Pickup; 1959 Cadillac
Source: Arkansas Office of Motor Vehicles

Growing up, Jim Walton worked for his dad at Wal-Mart sweeping stores and stocking shelves. Today, he presides over the largest family empire inside a non-descript building in Bentonville, Ark., that he shares with around 20 employees. For Walton, vehicles are a means to an end. This might explain why his daily driver is a 2002 Dodge Dakota pickup. When payload capacity is of concern, Walton might drive his 1999 Chevrolet Silverado pickup to the dump. But most days, he prefers his Dodge Dakota or 2000 Acura Integra, a nimble vehicle that returns superb fuel economy.