William Berkley & family vs Mark Zuckerberg
Real-time net worth, career, and company comparison — updated May 2026.
Wealth at a Glance
Net worth gap: $201.7B — equivalent to 97% of Mark's total wealth.
Tale of the Tape
Net Worth History
| Year | William | Mark | Leader |
|---|---|---|---|
| 2022 | — | $65B | — |
| 2023 | — | $170B | — |
| 2024 | $6.3B | $224.1B | Mark |
| 2025 | $6.2B | $222B | Mark |
| 2026 | $5.959B | $207.68B | Mark |
Career Highlights
William Berkley & family
- 1967Founded W. R. Berkley CorporationFounded W. R. Berkley Corporation with $2,500 in start-up capital, which later became a Fortune 500 company.
- 1973W. R. Berkley Corporation went publicThe company went public, with William Berkley owning 23.8% of the company.
- 2014Chairman of the Board of Trustees, New York UniversityServed as chairman of the Board of Trustees at his alma mater, New York University.
- 2015Transitioned to Executive ChairmanStepped down as CEO, becoming Executive Chairman of W. R. Berkley Corporation.
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.
The Verdict: Mark Zuckerberg vs William Berkley & family
As of May 2026, Mark Zuckerberg leads this comparison with a net worth of $207.68B, placing at #6 in the global rankings. William Berkley & family follows at $5.959B — a gap of $201.7B.
The two leaders come from distinct industries — Finance & Investments for William Berkley & family 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 Berkley & family is 79 years old versus 41 for Mark Zuckerberg, a difference of 38 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