Lukas and Christy Walton, the son and widow of Sam's late son, John T. Walton, also feature on Bloomberg's rich list with net worths of about $40 billion and $18 billion each. The five Waltons ...
When John T. died in a plane crash in 2005 he left the bulk of his fortune to his son Lukas and wife Christy. Lukas Walton is ...