James Clark vs Mark Zuckerberg
Real-time net worth, career, and company comparison — updated June 2026.
Wealth at a Glance
Net worth gap: $200.1B — equivalent to 96% of Mark's total wealth.
Tale of the Tape
Career Highlights
James Clark
- 1981Founded Silicon Graphics, Inc.Co-founded Silicon Graphics, a company that became a leader in 3D imaging and visual effects.
- 1994Co-founded Netscape CommunicationsCo-founded Netscape, a company that developed the Netscape Navigator web browser, which was instrumental in the early growth of the internet.
- 1996Founded HealtheonFounded Healtheon, later WebMD, an internet-based healthcare service.
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 | $7.3B | $224.1B | Mark |
| 2025 | $7.2B | $222B | Mark |
| 2026 | $7.555B | $207.68B | Mark |
The Verdict: Mark Zuckerberg vs James Clark
As of June 2026, Mark Zuckerberg leads this comparison with a net worth of $207.68B, placing at #6 in the global rankings. James Clark follows at $7.555B — a gap of $200.1B.
The two leaders come from distinct industries — technology for James Clark 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 Clark is 82 years old versus 41 for Mark Zuckerberg, a difference of 41 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.
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Net worth estimates updated daily from public financial disclosures. Methodology · Report an error