IE 11 is not supported. For an optimal experience visit our site on another browser.

CNBC: Facebook to increase IPO size, value to $18.5B

Facebook plans to increase the size of its IPO by 85 million shares, says someone familiar with the matter, a move that could value its upcoming offering at as much as $18.5 billion.

The social network’s 25 percent upsize plan will be filed with regulators at the U.S. Securities and Exchange Commission Wednesday morning, this person said.

Facebook’s expected move takes the size of its new issue from roughly 340 million shares to roughly 420 million, a change that, combined with the greenshoe -- additional shares that could be sold by bankers in the aftermath of the IPO -- could value the total deal at nearly $20 billion.

A final decision on Facebook’s IPO price, which is expected to be somewhere between $34 and $38 per share, will be made Thursday evening.

Previously: Facebook raises price range for IPO

CNBC.com: As investors Fawn over Facebook, poll finds user distrust, apathy

CNBC.com quiz: What's your facebook IQ?

CNBC.com: Confidence lacking in Zuckerberg as corporate steward 

Full Facebook IPO coverage from CNBC.com