 In 1994, Armen co-founded Antigenics with Srivastava.Agenus 
Armen is chairman and chief executive officer of Agenus Inc., formerly known as Antigenics Inc., a biotechnology company that discovered Oncophage, a personalized cancer vaccine recently approved in Russia for patients with earlier-stage kidney cancer and currently under review with the European Regulatory Agency.The clinical history of Oncophage was described in detail in a story in the "Wall Street Journal", August 2, 2007.