Photograph by Manu Fernandez/AP Photo
5. Glu Mobile
Value of IPO: $86.2 million
First day of trading: March 21, 2007
Market status: Active
The maker of mobile games "Dragon Slayer" and "Gun Bros" was considered an acquisition target after Zynga bought OMGPOP in 2012. Nothing materialized for the San Francisco-based company. Today, Glu's stock is up more than 110 percent over the past 12 months, but shares are still less than half the price when it went public.