To create this piece we collated information about each individual’s historical net worth from rich lists, profiles, interviews and news articles. Figures for current net worth accurate as of January 2016.

Sources

From millions to billions. What age did these entrepreneurs make their first billion?

See how long it took 21 of the world’s richest entrepreneurs to build their fortunes. Find out who was the youngest billionaire, who went from $1 million to $1 billion the fastest, and who took their time to prosper.

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