An IPO is not something you do just at one day out of the blue. It needs a lot of planning and paperwork. Uber has been planning this for for something like a y

An IPO is not something you do just at one day out of the blue. It needs a lot of planning and paperwork. Uber has been planning this for for something like a year, since their new CEO came on board. They even started showing their finances and earnings since a while ago, which is not something a private company has to do.