Facebook's Sandberg is now a billionaire

  @CNNTech January 22, 2014: 12:54 PM ET
Sheryl Sandberg on women vs. men
NEW YORK (CNNMoney)

A record high close for Facebook shares has made Sheryl Sandberg one of the youngest female billionaires ever, according to a ranking from Bloomberg.

Sandberg, who is the company's chief operating officer, owns 12.3 million shares. That makes her stake worth about $720 million.

In addition, she owns 4.7 million options, which would net her $220.6 million at her exercise price.

She has also received stock awards which have not yet vested, the estimated value of which takes her over the $1 billion mark.

Female billionaires are still relatively rare. Bloomberg's list of the 200 richest people worldwide shows only 17 who are women.

Forbes reported last year that there were 138 female billionaires worldwide, but that's out of a total 1,426 billionaires worldwide.

And only 24 of the women billionaires on the Forbes list earned their wealth themselves; most inherited a significant portion of their fortune.

Related: Most powerful women in business

Sandberg joined Facebook in 2008 after working at Google (GOOG, Fortune 500). Before that she was the chief of staff to Lawrence Summers when he served as Treasury secretary in the Clinton administration. Fortune magazine ranked her as the fifth most powerful woman in business, and with 2012 earnings of $26.2 million, the third highest paid woman.

She also wrote a best-selling book last year, "Lean In." She serves on the board of Walt Disney (DIS, Fortune 500) and was previously a director of Starbucks (SBUX, Fortune 500).

AmEx CEO and Sheryl Sandberg on 'Lean In'

But despite her accomplishments, the 44-year old Sandberg is not as wealthy as company founder and CEO Mark Zuckerberg.

The 29-year old Zuckerberg owns 426.3 million Facebook shares, worth nearly $25 billion. Two of Zuckerberg's former college classmates, Dustin Moskovitz and Eduardo Saverin, are also both billionaires due to their Facebook stake, according to the company's most recent filings.

Facebook (FB, Fortune 500) shares closed Tuesday at $58.51, up about 4% for the day, although they were slightly lower in early trading Wednesday. To top of page



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