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Sean Parker.
- Sean Parker got his start as a teenage hacker before cofounding the file-sharing service Napster in 1999.
- Parker later joined Facebook in the company's early days, becoming the founding president of the site at 24.
- These days, the 40-year-old billionaire is funding philanthropic programs in life sciences, global public health, and civic engagement, and is working to solve economic challenges throughout the US.
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Sean Parker found massive success at an incredibly young age.
At 19, he cofounded Napster, a file-sharing service that would change how the world consumes music.
By 24, he was the founding president of Facebook, a startup that was then tiny but would go on to become the biggest social network in the world.
The 40-year-old, whose net worth is estimated to be about $2.7 billion, hasn't slowed a bit: he donates millions to philanthropic causes and lives an expensive lifestyle.
Here's how Parker got his start, ended up at Facebook, and became a billionaire.
Madeline Stone contributed to an earlier version of this story.
