Around this time last year Facebook founder Mark Zuckerberg made a very hefty $13 billion when the social network went public, and now Zuckerberg could be looking at a tax bill of around $1 billion.
The founder of Facebook was prepared for the taxes, which could've been why he sold $1 billion of shares on the day - trying to keep his handful of money a little lighter for the tax man. Zuckerberg has also been nice to charity, where he has given around $500,000,000 (that's $500 million!) to the SIlicon Valley Community Foundation, which should offset his tax bill by a decent margin.
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