William Koch vs Mark Zuckerberg
Real-time net worth, career, and company comparison — updated June 2026.
Wealth at a Glance
Net worth gap: $205.7B — equivalent to 99% of Mark's total wealth.
Tale of the Tape
Career Highlights
William Koch
- 1980Attempted Takeover of Koch IndustriesWilliam Koch attempted to take over Koch Industries but was fired from the company.
- 1983Sold Stake in Koch IndustriesSold his stake in Koch Industries to his brothers Charles and David for $800 million.
- 1983Founded Oxbow Carbon LLCFounded Oxbow Carbon LLC, an energy development holding company.
- 1992America's Cup VictoryWon the America's Cup as a competitive sailor.
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 | William | Mark | Leader |
|---|---|---|---|
| 2022 | $2B | $65B | Mark |
| 2023 | $2B | $170B | Mark |
| 2024 | $2B | $224.1B | Mark |
| 2025 | $2B | $222B | Mark |
| 2026 | $1.951B | $207.68B | Mark |
The Verdict: Mark Zuckerberg vs William Koch
As of June 2026, Mark Zuckerberg leads this comparison with a net worth of $207.68B, placing at #6 in the global rankings. William Koch follows at $1.951B — a gap of $205.7B.
The two leaders come from distinct industries — Energy for William Koch 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.
William Koch is 85 years old versus 41 for Mark Zuckerberg, a difference of 44 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