SAN FRANCISCO, CA - FILE: Facebook CEO Mark Zuckerberg delivers a keynote address during the Facebook f8 conference on September 22, 2011 in San Francisco, California. According to reports May 19, ... more 
SAN FRANCISCO, CA - FILE: Facebook CEO Mark Zuckerberg delivers a keynote address during the Facebook f8 conference on September 22, 2011 in San Francisco, California. According to reports May 19, 2012, Facebook has set its per share stock price to $38, reaping an estimates $18.4 billion. (Photo by Justin Sullivan/Getty Images) less 
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Getty Images | Photo By Justin Sullivan / Getty Images
Thu, May 17, 2012 4:43 PM EDT