Sheryl Sandberg, Chief Operating Officer of Facebook, speaks at a Facebook event for marketing professionals, Wednesday, Feb. 29, 2012 in New York. New, potentially lucrative advertising opportunities are coming to Facebook as a prelude to its initial public offering of stock. The idea is to lure big brands with the promise of effective, precisely targeted ads that reach the social network's 845 million users.(AP Photo/Mark Lennihan)
SAN FRANCISCO — When Facebook filed for what is expected to be one of the biggest ever initial public stock offerings, the company identified just two executives it could not do without: founderMark Zuckerberg and Chief Operating Officer Sheryl Sandberg.
Sandberg isn’t as famous as her 27-year-old boss, but she’s the one who turned the social networking service into one of the world’s most richly valued businesses.
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