Menlo Park, Calif. -- For the second time this week, social networking giant Facebook has increased the size of its upcoming IPO, this time increasing the number of shares to be sold by 25%. The company now plans to sell 421.2 million shares in an offering that could raise $16 billion, making it the largest-ever technology IPO. The move comes two days after Facebook raised the price range of its shares to $34-$38 each -- up from earlier estimates of $28-$35. The IPO is expected to price by the end of this week.
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