Mark Zuckerberg vs Thomas Duff: who is richer?
Mark Zuckerberg is richer, with a net worth of $209.7 billion versus Thomas Duff's $4.45 billion — a gap of $205.3 billion, or 47 times as much (as of November 7, 2026).
Mark Zuckerberg
Source of wealth: Facebook
$209.7B
Thomas Duff
Source of wealth: Tires, diversified
$4.45B
Made since you opened this page: $0.00
Side-by-side
| Mark Zuckerberg | Thomas Duff | |
|---|---|---|
| Net worth | $209.7B | $4.45B |
| World rank | #5 | #962 |
| Makes per second | −$124 | $22.84 |
| Makes per day | −$10.69M | $1.97M |
| Today | +$1.72B | $0 |
| Source of wealth | Tires, diversified | |
| Age | 42 | 69 |
| Country | United States | United States |
Net worth by year
| Year | Mark Zuckerberg | Thomas Duff |
|---|---|---|
| 2026 | $222B | $4.5B |
| 2025 | $216B | $3.3B |
| 2024 | $177B | $3B |
| 2023 | $64.4B | $2.3B |
| 2022 | $67.3B | $2B |
| 2021 | $97B | $1.4B |
| 2020 | $54.7B | $1.4B |
| 2019 | $62.3B | $1.2B |
| 2018 | $71B | — |
| 2017 | $56B | — |
| 2016 | $44.6B | — |
| 2015 | $33.4B | — |
Frequently asked questions
Who is richer, Mark Zuckerberg or Thomas Duff?
Mark Zuckerberg is richer, worth $209.7 billion compared with Thomas Duff's $4.45 billion. The difference is $205.3 billion.
Who makes more per second, Mark Zuckerberg or Thomas Duff?
Thomas Duff makes more: about $22.84 per second versus −$124. Per day that's $1.97M vs −$10.69M.
How many times richer is Mark Zuckerberg than Thomas Duff?
Mark Zuckerberg has about 47 times Thomas Duff's net worth.