#1 Jeff Bezos & family (Source of Wealth: AMAZON)

Jeff Bezos founded e-commerce colossus Amazon in 1994 out of his garage in Seattle. He remains CEO and owns a 16% stake.
In January, he and his wife, MacKenzie, announced they will divorce after 25 years of marriage. Terms of the split have not been disclosed.
MacKenzie was Amazon's first accountant. Per Washington state law, she could get up to half of Jeff's assets, making her the richest woman on earth.
In 2018, Amazon pulled in $230 billion in revenues and a record $10 billion in net profit, up from $3 billion the prior year.
In February, Amazon announced it was canceling plans for a second headquarters in Long Island City, New York after local lawmakers opposed the plan.
Bezos owns The Washington Post and Blue Origin, an aerospace company that is developing a rocket for commercial use.

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#2 Bill Gates

Cofounder, Bill & Melinda Gates Foundation

With his wife Melinda, Bill Gates chairs the Bill & Melinda Gates Foundation, the world's largest private charitable foundation.
The foundation works to save lives and improve global health, and is working with Rotary International to eliminate polio.
Gates has sold or given away much of his stake in Microsoft -- he owns just over 1% of shares --and invested in a mix of stocks and other assets.
He remains a board member of Microsoft, the software firm he founded with Paul Allen in 1975.
In late 2016, Gates announced the launch of a $1 billion Breakthrough Energy investment fund with about 20 other people.
To date, Gates has donated $35.8 billion worth of Microsoft stock to the Gates Foundation.