Stewart Rahr vs Mark Zuckerberg
Real-time net worth, career, and company comparison — updated June 2026.
Wealth at a Glance
Net worth gap: $203.4B — equivalent to 98% of Mark's total wealth.
Tale of the Tape
Career Highlights
Stewart Rahr
- 1969Took over family pharmacyRahr took over his family's pharmacy business after dropping out of law school.
- 1970s-2010Built Kinray Inc.Expanded the family business into Kinray Inc., a major pharmaceutical distributor, serving over 2,000 pharmacies.
- 2010Sold Kinray to Cardinal HealthSold Kinray for $1.3 billion, becoming a billionaire.
- 2011Established the Stewart J. Rahr FoundationCreated the foundation to support youth, education, and medical research.
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 | Stewart | Mark | Leader |
|---|---|---|---|
| 2020 | $1.7B | — | — |
| 2022 | — | $65B | — |
| 2023 | — | $170B | — |
| 2024 | $4.3B | $224.1B | Mark |
| 2025 | $4.3B | $222B | Mark |
| 2026 | $4.272B | $207.68B | Mark |
The Verdict: Mark Zuckerberg vs Stewart Rahr
As of June 2026, Mark Zuckerberg leads this comparison with a net worth of $207.68B, placing at #6 in the global rankings. Stewart Rahr follows at $4.272B — a gap of $203.4B.
The two leaders come from distinct industries — Healthcare for Stewart Rahr 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.
Stewart Rahr is 80 years old versus 41 for Mark Zuckerberg, a difference of 39 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