Twitter IPO
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Five memorable tech IPO moments

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The search giant, which was founded in 1998 by Larry Page and Sergey Brin, went public in 2004 and raised about $1.7 billion, valuing the company at about $27 billion.

(Read more: Twitter 101: Big names investors should follow)

And while the IPO turned about 1,000 Google employees into instant millionaires—and its founders into billionaires—the company had a rough time leading up to its public offering.

(Read more: Twitter IPO could mint more millionaires in Silicon Valley)

First, there was an interview of Page and Brin published in Playboy magazine, which violated the SEC's rules restricting comments made about a company in the period leading up to its IPO.

There was also a last-minute change in the expected IPO share price. Google had originally estimated a suggested price range of $108 to $135, but right before the SEC approved the IPO Google had revised the estimated share price range to $85 to $95.

A Google spokesperson declined to comment.

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