ImClone Systems Incorporated (NASDAQ: IMCL) announced today that the Company will host an analyst meeting on Sunday, June 6, 2004 from 5:00 P.M. to 7:00 P.M. Central Time (6:00 P.M. to 8:00 P.M. Eastern Time) in the Lafitte A Room at the Chateau Sonesta Hotel in New Orleans, LA (800 Iberville Street) to discuss clinical data presented on ERBITUX(TM) (Cetuximab) during the American Society of Clinical Oncology (ASCO) annual meeting. Attendance at this meeting is restricted to investors and financial analysts.