Splunk (SPLK) went public this week and both Infoblox and Palo Alto Networks will soon follow. This could be the start of a security IPO run moving forward. Why? Status quo security defenses aren't working so there is a burgeoning market for next-generation security technologies. This market opportunity has driven M&A activities for years but we've recently seen far broader interest in security. HP grabbed ArcSight and started a security business unit. IBM acquired Q1 Labs and did the same. Dell purchased SecureWorks and SonicWall. Investment is pouring into the security sector driving innovation and a present and future wave of IPOs.