Facebook CEO Mark Zuckerberg reaped a $US3.3 billion ($A3.58 billion) gain last year by exercising stock options in the social networking company that he founded in his Harvard dorm room.
Facebook Inc spelled out the windfall in regulatory documents filed on Monday. It marks the second straight year that Zuckerberg has realised a huge gain from stock options. In 2012, he made $US2.3 billion off his stock options.
The documents show Zuckerberg had no stock options remaining after exercising 60 million of them last year at a price of 6 cents per share. He then sold 41.35 million shares for $US55.05 apiece in December primarily to cover his taxes.
The 29-year-old Zuckerberg still owns 426.3 million Facebook shares currently worth $US25.7 billion.
Facebook paid Zuckerberg a $US1 salary last year.
