Facebook Inc. (FB) co-founder and chief executive Mark Zuckerberg is the wealthiest individual in the world under the age of 35, according to Forbes World Billionaires List.

Zuckerberg’s wealth at the time the list was compiled stood at $56 billion. He leads by a big margin. Following Zuckerberg is Wal-Mart heir Lukas Walton, with an estimated net worth of $11.3 billion. Dustin Moskovitz, co-founder of Facebook, ranked fourth with an estimated net worth of $10.7 billion.

Rich Folk Demographics

So how did they amass their fortunes? Seven out of ten on the list are self-made billionaires. The rest inherited or have fortunes that are a combination of self-made and inherited. Eight of them are from the U.S., and two are from China.

The richest — and the only — woman on the list is Huiyan Yang, the 34-year-old vice chairman of Chinese real estate developer Country Garden Holdings. She ranked fourth on the list overall with an estimated net worth of $9 billion.

Three Airbnb execs also made the list: co-founders Brian Chesky, Nathan Blecharczyk and Joe Gebbia. Each has an estimated net worth of $3.8 billion.

Here are the top 10 wealthiest individuals in the world under the age of 35.

Rank

Name

Estimated Net Worth

Company

Country

Source of Wealth

1

Mark Zuckerberg

$56 billion

Facebook

US

Self-Made

2

Lukas Walton

$11.3 billion

Wal-Mart

US

Inheritance

3

Dustin Moskovitz

$10.7 billion

Facebook/Asana

US

Self-Made

4

Yang Huiyan

$9 billion

Country Garden Holdings

China

Inheritance

5

Eduardo Saverin

$7.9 billion

Facebook

US

Self-Made

6

Scott Duncan

$5.4 billion

Enterprise Products Partners

US

Inheritance

7

Nathan Blecharczyk

$3.8 billion

Airbnb

US

Self-Made

8

Brian Chesky

$3.8 billion

Airbnb

US

Self-Made

9

Joe Gebbia

$3.8 billion

Airbnb

US

Self-Made

10

Frank Wang

$3.6 billion

SZ DJI Technology

China

Self-Made

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