James Duff

James Duff

James Duff (#951)

  • $ 5 B
  • Tires, diversified
  • United States
  • M
  • 65 Years

About Me

Brothers James and Thomas Duff cofounded and co-own Duff Capital Investors, a holding company with total revenue of $6 billion from more than 20 businesses. Their father founded the family's tire business in 1973 and sold it in 1998 to Tire Distribution Systems. The Duff brothers bought the company back in 2003 and since then have turned it into Southern Tire Mart, now the largest truck tire dealer and retread manufacturer in the U.S. Southern Tire Mart now sells over 4 million new tires and 2.5 million truck tire retreads each year, and has a partnership with Pilot Flying J to open locations at their truck stops. He and his brother are the only billionaires in Mississippi.
About Images

Achievements

Career Highlights

A snapshot of the defining milestones, leadership decisions, and breakthroughs that shaped James Duff’s rise and global influence.

  • #954   Billionaires (2026)
  • #362   Forbes 400 (2025)
  •   The Richest Person In Every State (2025)

Wealth Growth

Net Worth Growth Over Time

Tracking James Duff’s net worth journey over the years, highlighting key growth phases and financial milestones.

Current Net Worth: $4.5B (May 4, 2026)