Sheryl Sandberg’s fortune surpassed $1 billion yesterday after Facebook Inc. closed at a record.

The chief operating officer of the world’s most popular social-networking service owns about 12.3 million shares of the Menlo Park, California-based company, which closed at $58.51 in New York. Her stake is valued at about $750 million.

Sandberg has collected more than $300 million selling shares since the company’s 2012 initial public offering, and owns about 4.7 million stock options that began vesting last May. The 44-year-old is one of the youngest female billionaires in the world, according to the Bloomberg Billionaires Index.

“She was brought in to figure out how to make money,” David Kirkpatrick, author of “The Facebook Effect,” a history of the company, said in a telephone interview. “It’s proving to be one of the greatest stories in business history.”

Sandberg’s rise in wealth mirrors her broadening role on the global stage. The Harvard University graduate and one-time chief of staff for former Treasury Secretary Lawrence Summers is a donor to President Barack Obama, sits on the board Walt Disney Co., and authored the bestselling book, “Lean In.” She was lured from Mountain View, California-based Google Inc. in 2008, and stepped down from the board of Starbucks Corp. in 2012.

“She went to Google, moved on to go to Facebook, went to write a book, and she’ll know when to run for political office, and probably win that office,” Kirkpatrick said.

Elisabeth Diana, a Facebook spokeswoman, declined to comment on Sandberg’s net worth. The billionaire will attend the World Economic Forum’s annual meeting this week in Davos, Switzerland.

Zuckerberg Gains

Facebook probably had a “solid” fourth quarter with advertisement revenue around $100 million above consensus, Ross Sandler, an analyst at Deutsche Bank AG in New York, wrote in a research report Jan. 7.

“Engagement continues to increase broadly for FB, owing to the strong footprint in mobile,” Sandler said in the report. He has a “buy” rating on the company.

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