Sheryl Sandberg Becomes One Of The World's Youngest Female Billionaires

Sheryl Sandberg has officially joined the billionaire club after Facebook's stock closed at a record high on Tuesday.

At that moment, the 44-year-old chief operating officer became one of the youngest female billionaires in the world, according to the Bloomberg Billionaires Index. She owns about 12.3 million shares of Facebook, her stake valued at around $750 million. The social networking giant closed at $58.51 on Tuesday, and is currently trading at 56.09, a 4.14 percent drop.

Sandberg's influence has risen alongside her wealth. Her book "Lean In," published earlier this year, fueled heated public discourse about women in the workplace as it called for them to shed their insecurities and push for the things they deserve, like raises and leadership positions. She was also a one-time chief of staff for the former Treasury Secretary Lawrence Summers, and now sits on the boards of Starbucks Corp. and Walt Disney Co.

The billionaire is currently attending the World Economic Forum in Davos, Switzerland, where the world's elite have convened to discuss global social, economic and political quandaries.

How Facebook's stock has performed since its 2012 IPO: