SAN FRANCISCO — A Silicon Valley company that touted the security of its mobile platform is facing a shareholder class action related to a 2014 data breach.

MobileIron Inc. sells software intended to help companies securely manage their employees’ mobile devices. A suit filed last week in Santa Clara County Superior Court claims the company failed to disclose before launching its June 2014 initial public offering that hackers had infiltrated the MobileIron platform used by British insurance company Aviva PLC.