Facebook is under pressure to take the company public after a fresh $500m (£320m) investment took its value to the same as Tesco at $50bn.
Currently, clients can purchase a piece of Mark Zuckerburg’s social media empire by investing at least $2m if they agree to not sell the shares until 2013 and no trade in secondary stock markets.
Goldman Sachs and Russian tech investment firm Digital Sky are the latest to pour more money into Facebook, prompting scrutiny from the securities and exchange commission (SEC) in the US, which stipulates that firms with 500 or more shareholders must go public.
According to the Guardian’s Jemima Kiss: “Facebook won an exemption from this ruling in November 2008 by saying most of its shareholders were staff. Outside Facebook, though, nobody knows for sure how many investors it has.”