Rubens Ometto Silveira Mello vs Mark Zuckerberg
Real-time net worth, career, and company comparison — updated June 2026.
Wealth at a Glance
Net worth gap: $206.3B — equivalent to 99% of Mark's total wealth.
Tale of the Tape
Career Highlights
Rubens Ometto Silveira Mello
- 1971-1973ExecutiveWorked as a corporate executive at Unibanco.
- 1974Financial DirectorBecame the financial director of the Votorantim Group.
- 1986PresidentAssumed the presidency of Cosan.
- 2007World's First Ethanol BillionaireBecame the first ethanol billionaire.
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 | Rubens | Mark | Leader |
|---|---|---|---|
| 2022 | — | $65B | — |
| 2023 | — | $170B | — |
| 2024 | $1.5B | $224.1B | Mark |
| 2025 | $1.5B | $222B | Mark |
| 2026 | $1.336B | $207.68B | Mark |
The Verdict: Mark Zuckerberg vs Rubens Ometto Silveira Mello
As of June 2026, Mark Zuckerberg leads this comparison with a net worth of $207.68B, placing at #6 in the global rankings. Rubens Ometto Silveira Mello follows at $1.336B — a gap of $206.3B.
The two leaders come from distinct industries — Energy for Rubens Ometto Silveira Mello 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.
Rubens Ometto Silveira Mello is 76 years old versus 41 for Mark Zuckerberg, a difference of 35 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