This may give you an idea. http://www.quora.com/How-long-does-it-take-between-a-company-filing-to-IPO-and-the-IPO-itself
I88 Infini soars 50% as company reveals it could’ve just made uranium history – redefining what it means to be “high grade”
Week 28 Wrap: ASX hits all time high; CBA shares' two realities; US inflation hits 3% ahead of China plenum