Zscaler IPO: Five things to know about the first big tech IPO of 2018 By: MarketWatch March 14, 2018 at 11:48 AM EDT The first Silicon Valley tech unicorn to go public in 2018 is a security-software company that is watching what you do at work. Read More >> Related Stocks: Check Point Software Cisco Systems ETFMG Prime Cyber Security ETF F5 Networks Fireeye Inc Fortinet Inc Guidewire Software Inc Palo Alto Networks Inc Symantec Corp