Facebook shares

Facebook announced that it has filed for an IPO to raise US$5 billion. This would put the valuation of the company between US$75-100 billion, making it the biggest IPO in Internet history and among the top 25 among all IPOs.

Founder Mark Zuckerberg holds about 28% of the shares, which is worth about US$28bn.

However, opinions differ on what Facebook is really worth, even as its subscriber base of 800 million continues to grow.

So while more people seek to join the social network, Facebook has finally joined a different kind of network, one with a wall of its own – the world of Wall Street.