Zuckerberg is No. 16 on the ranking. The Google founders are 17th and 18th. Bezos occupies the 20th spot.
"He's just getting started," said David Kirkpatrick, author of "The Facebook Effect. "He's going to become the richest person on the planet."
The Menlo Park, Calif.-based company posted second-quarter sales that soared 61% to $2.91 billion Wednesday, exceeding analysts' average estimate of $2.81 billion. The company's revenue gain follows Google's results last week, when the Web-search company posted sales that topped analysts' estimates, largely based on the strength of online ads.
Facebook has jumped 183% in the past 12 months, the biggest rally in the Standard & Poor's 500 Index, according to data compiled by Bloomberg.
Bill Gates remains the world's richest person with an $84.7 billion fortune. The
The 58-year-old, who controls the majority of his fortune through holding company Cascade Investment, also has collected about $400 million in dividends this year.