Facebook CEO Mark Zuckerberg's Pay Drops 67 Percent in 2013

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Facebook's chairman loses $5.6 billion between the company's May 18 IPO at a $38 stock price and its June 4 close at $26.90. Some analysts predict an even further slide.

Zuckerberg's compensation fell because of a $1 base salary; COO Sheryl Sandberg was paid $16.1 million, nearly half what she earned the previous year.

Facebook CEO Mark Zuckerberg earned $651,165 in 2013, down from $2 million one year prior, the social network company said in a filing Monday.

Zuckerberg's compensation fell in part because he took just $1 in base salary, as opposed to $503,205 the year before.

Monday's filing also indicated that Zuckerberg made $3.3 billion by exercising stock options, but those gains aren't considered part of his 2013 compensation. A year earlier, he made a $2.3 billion gain on stock options.

Zuckerberg owns 426.3 million shares of the company he co-founded, according to Monday's filing. He is worth $27 billion and is the 22nd richest person in the world, according to the Bloomberg Billionaires Index.

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Sheryl Sandberg, Facebook's COO, was paid $16.1 million in 2013, down from $26.2 million a year earlier.

David Ebersman, the company's CFO, was paid $10.5 million, down from $17.5 million.

David Fischer, vp business and marketing partnerships, was paid $8 million, down from $12 million; and chief technology officer Mike Schroepfer made $12.6 million, down from $20.7 million.