9. Jim Walton – Net Worth $33.7 Billion
The youngest of Wal-Mart founder Sam Walton’s 4 children, today Jim Walton is on the board of the mega-retailer with $486 million in annual sales and 11,000 stores all over the world. Heirs of Sam Walton together own 51% of Wal-Mart’s publicly traded shares, and brother Rob just stepped down as chairman this year. Jim himself is also CEO of Arvest Bank, another family-founded business initiative now with branches in Arkansas, Kansas, Oklahoma and Missouri as well as assets of almost $16 billion as of last year.