PBK HOLDINGS INC

• 10% owner at COSI INC · on record since Nov 7, 2006
• 10% owner at IMMUNOGEN INC · on record since Jun 30, 2008
• 10% owner at DRUGSTORE COM INC · on record since Mar 10, 2005
• 10% owner at ORCHID CELLMARK INC · on record since Mar 14, 2005
• See Explanation of Responses. at ORCHID CELLMARK INC · on record since Apr 20, 2005