Marilyn Simons & family vs Mark Zuckerberg
Real-time net worth, career, and company comparison — updated June 2026.
Wealth at a Glance
Net worth gap: $175.1B — equivalent to 84% of Mark's total wealth.
Tale of the Tape
Career Highlights
Marilyn Simons & family
- 1994Co-founded the Simons FoundationEstablished the foundation with her husband, Jim Simons, to support research in mathematics and basic sciences.
- 2008Joined the Cold Spring Harbor Laboratory Board of TrusteesBecame a member of the board of trustees for the Cold Spring Harbor Laboratory.
- 2014Founded the Stony Brook Women's Leadership CouncilEstablished a mentoring program for undergraduate women at Stony Brook University.
- 2019Chair of the Board of Trustees of the Cold Spring Harbor LaboratoryAssumed the role of chair of the board.
- 2024WidowedHer husband, Jim Simons, passed away.
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 | Marilyn | Mark | Leader |
|---|---|---|---|
| 2022 | $32B | $65B | Mark |
| 2023 | $32.5B | $170B | Mark |
| 2024 | $32.5B | $224.1B | Mark |
| 2025 | $32.5B | $222B | Mark |
| 2026 | $32.549B | $207.68B | Mark |
The Verdict: Mark Zuckerberg vs Marilyn Simons & family
As of June 2026, Mark Zuckerberg leads this comparison with a net worth of $207.68B, placing at #6 in the global rankings. Marilyn Simons & family follows at $32.549B — a gap of $175.1B.
The two leaders come from distinct industries — Finance & Investments for Marilyn Simons & 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.
Marilyn Simons & family is 75 years old versus 41 for Mark Zuckerberg, a difference of 34 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