Net Worth Comparison

Theo Roussis vs Mark Zuckerberg

Real-time net worth, career, and company comparison — updated July 2026.

Theo Roussis

Theo Roussis

CEO, Plastic
Net Worth
$3.225B
+1.26% today
Mark Zuckerberg
Wealthier

Mark Zuckerberg

Net Worth
$207.68B
+$204.5B more than Theo
+0.40% today

Wealth at a Glance

Theo Roussis$3.225B
Mark Zuckerberg$207.68B

Net worth gap: $204.5B — equivalent to 98% of Mark's total wealth.

Tale of the Tape

Theo Roussis
Mark Zuckerberg
$3.225B
Net Worth
$207.68B
#1310
Global Rank
#6
72
Age
41
BELGIUM
Country
UNITED STATES
Plastic
Source of Wealth
Facebook
Manufacturing
Industry
Technology
University of Athens (Biochemistry) and University of Seville (Food Biochemistry)
Education
Harvard University (dropped out)
Annual Salary
$0.0M

Career Highlights

Theo Roussis

  1. 1993
    CEO of Ravago
    Became the CEO of Ravago, a plastics recycling and distribution company, following the death of his father-in-law, Raf Van Gorp.
  2. 2006
    Acquisition of Muehlstein
    Ravago acquired Muehlstein, the fifth-largest plastics producer globally, which made Ravago the largest in the world.
  3. 2023
    Transition to Chairman
    Transitioned from CEO to Chairman of the Board, with his son Axel Roussis taking over as CEO.

Mark Zuckerberg

  1. 2004
    Founded Facebook
    Co-founded Facebook while at Harvard University.
  2. 2008
    Became a Billionaire
    Became a billionaire at age 23.
  3. 2012
    Facebook IPO
    Took Facebook public, making it one of the largest IPOs in history.
  4. 2021
    Meta Rebranding
    Facebook rebranded to Meta Platforms, Inc., focusing on the metaverse.

Net Worth History

YearTheoMarkLeader
2022$3.1B$65BMark
2023$170B
2024$3.3B$224.1BMark
2025$3.3B$222BMark
2026$3.225B$207.68BMark

The Verdict: Mark Zuckerberg vs Theo Roussis

As of July 2026, Mark Zuckerberg leads this comparison with a net worth of $207.68B, placing at #6 in the global rankings. Theo Roussis follows at $3.225B — a gap of $204.5B.

The two leaders come from distinct industries — Manufacturing for Theo Roussis 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.

Theo Roussis is 72 years old versus 41 for Mark Zuckerberg, a difference of 31 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.