Zuckerberg earns $3.3B in 2013 stock option gains

Mark Zuckerberg earned a salary of just $1 in 2013, but the Facebook founder and CEO hauled in $3.3 billion in stock options, according to Fox News.

The 29-year-old still owns 426.3 million shares of Facebook, valued at $25.7 billion.

Facebook Chief Operating Officer Sheryl Sandberg reportedly sold about 10 million shares worth $400 million since the company's initial public offering in May 2012.

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