Andrew Rosen is a pioneer in the contemporary fashion market, co-founding Theory with Elie Tahari in 1997. Rosen sold the majority of his shares in Theory in 2003 to Japan's Fast Retailing, but retains an 11 percent share and continues to run the company. He has a particularly strong relationship with Theory’s owner, Tadashi Yanai , whose company also owns Uniqlo and J Brand. Following the sale of Theory, Rosen invested $10 million dollars in emerging designers. Rosen's portfolio of investments includes Alice + Olivia, Rag & Bone and Proenza Schouler . Rosen also has stakes in Kiki de Montparnasse, Aiko, and Gryphon. Theory, Chief Executive 1997 - Present New York, United States Anne Klein 1993 - 1997 Puritan Manufacturing Co. 1983 - 1993