Here is a link to the Facebook IPO filing:
It makes for compelling, if long!, reading.
As someone starting out on the journey, like I am, then what amazes me is how much of the business still remains in the hands of Mark. Its around 60%, even given all of the funding rounds (5) the business has been through.
As a nice story, its good to see his Dad, the original backer, getting recognised in the share allocation – even though he messed up on activating his share options within the original 12 month window.
I guess when you have something that good you dictate the terms.