What is the time between an IPO filing (thinking S-1 registration and having a lead underwriter) and being traded on the public exchanges?

slide 9 here shows a calendar http://www.slideshare.net/samanthachmelik/The-IPO-Process-IC-Training

but I'm not sure what part is "IPO filing" and which part is "public trading"

1 Answer 1


This is not a fixed nor predictable amount of time and will depend on market conditions. If a company files appropriate paperwork to declare the intent to go public, but then the market sours, it would not be unusual for a company to push back their IPO until a later time.

  • 1
    okay, company puts out S-1, can their shares be trading the next day?
    – CQM
    Jan 27, 2012 at 21:18

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