Qihoo 360 Technology Co. (Qihoo 360)

The third largest Internet company in China as measured by user base. In January 2011, it had 339 million monthly active Internet users, representing a user penetration rate of 85.8% in China. It offers Internet and mobile security products and services to protect users' computers and mobile devices against malware and malicious websites. It is monetized primarily through offering online advertising and Internet value-added services.