Mark Zuckerberg, Facebook’s 29-year-old CEO, sold more than $2 billion in stock last month and donated another $1 billion to the Silicon Valley Community Foundation. The world’s 23rd- richest person added $12.4 billion to his net worth in 2013, according to the Bloomberg ranking.

Facebook’s other co-founders have also seen their fortunes surge. Dustin Moskovitz, the 29-year-old who founded Facebook with Zuckerberg, Eduardo Saverin and Chris Hughes at Harvard University, is the world’s 174th-richest person with a net worth of $7.4 billion. He’s wealthier than Liberty Media Corp. chairman John Malone and fashion mogul Ralph Lauren, and is the youngest billionaire on Earth.

Saverin, 31, controls a $3.2 billion fortune. Hughes, 30, has a net worth of more than $500 million. He bought the New Republic magazine in March 2012.

Other Executives

Peter Thiel, Facebook’s first outside investor, sold most of his stake in the company in August 2012, after restrictions on insider sales ended. The majority of the PayPal Inc. co- founder’s $2.3 billion net worth is derived from his stake in software developer Palantir Technologies Inc.

Facebook’s Chief Financial Officer David Ebersman also sold stock. The former Genentech Inc. executive has collected almost $100 million selling shares in the past year, according to regulatory filings with the U.S. Securities and Exchange Commission. He owns more than 5 million shares, including stock options, valued at about $300 million.

Mike Schroepfer, the company’s chief technology officer, has a stake valued at more than $100 million. The Mozilla Corp. and Sun Microsystems Inc. veteran has collected about $50 million selling Facebook stock.

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