James Duff vs Mark Zuckerberg
Real-time net worth, career, and company comparison — updated May 2026.
Wealth at a Glance
Net worth gap: $203.2B — equivalent to 98% of Mark's total wealth.
Tale of the Tape
Career Highlights
James Duff
- 1973Southern Tire Mart FoundedErnest Duff, James's father, founded the tire business.
- 1983Took Control of Southern Tire MartJames and Thomas Duff assumed control of the company.
- 2003Reacquired and Rebranded Southern Tire MartThe Duff brothers bought back the company and rebranded it.
- 2007Duff Capital Investors FoundedJames and Thomas Duff co-founded Duff Capital Investors.
- 2024Purchased DealershipsDuff Capital Investors bought dealerships in Mississippi.
Mark Zuckerberg
- 2004Founded FacebookCo-founded Facebook while at Harvard University.
- 2008Became a BillionaireBecame a billionaire at age 23.
- 2012Facebook IPOTook Facebook public, making it one of the largest IPOs in history.
- 2021Meta RebrandingFacebook rebranded to Meta Platforms, Inc., focusing on the metaverse.
Net Worth History
| Year | James | Mark | Leader |
|---|---|---|---|
| 2022 | — | $65B | — |
| 2023 | — | $170B | — |
| 2024 | $4.5B | $224.1B | Mark |
| 2025 | $4.5B | $222B | Mark |
| 2026 | $4.472B | $207.68B | Mark |
The Verdict: Mark Zuckerberg vs James Duff
As of May 2026, Mark Zuckerberg leads this comparison with a net worth of $207.68B, placing at #6 in the global rankings. James Duff follows at $4.472B — a gap of $203.2B.
The two leaders come from distinct industries — Diversified for James Duff and Technology for Mark Zuckerberg. Comparing them is therefore a comparison of different underlying asset types, growth rates, and risk profiles rather than a simple head-to-head within the same market.
James Duff is 65 years old versus 41 for Mark Zuckerberg, a difference of 24 years. Age context matters in wealth comparisons: a younger billionaire at the same net worth has had less time to accumulate — and in many cases represents a higher compound annual growth rate on their wealth.
Net worth figures are estimates calculated from public shareholding disclosures, stock price data, and reported asset values. See our full methodology.
Explore Full Profiles
Net worth estimates updated daily from public financial disclosures. Methodology · Report an error