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                          ImClone Systems Incorporated
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                          IMCLONE SYSTEMS INCORPORATED
                                180 Varick Street
                               New York, NY 10014
                                 (212) 645-1405


         On May 22, 2002, ImClone Systems Incorporated (the "Company") announced
that Samuel D. Waksal,  Ph.D., ("Dr. Samuel Waksal")  voluntarily  resigned from
his positions as President,  Chief Executive Officer and Director of the Company
and that Harlan W. Waksal,  M.D.,  previously Executive Vice President and Chief
Operating  Officer  of the  Company,  would  succeed  him in  the  positions  of
President  and Chief  Executive  Officer.  As a result of his  resignation,  Dr.
Samuel  Waksal is not  available to stand for election to the Board of Directors
of the Company.  The Board of Directors  has elected not to propose a substitute
nominee.  Accordingly, ten, rather than eleven, directors will be elected at the
Company's Annual Meeting of Stockholders (the "Annual Meeting").

         The Annual  Meeting  was  initially  convened  on May 23,  2002 and was
adjourned until June 11, 2002.  Details  regarding the adjourned  Annual Meeting
are set forth in the attached press release.



                                                 IMCLONE SYSTEMS INCORPORATED

                                                 /s/  Daniel S. Lynch
                                                 -----------------------------
                                                 By:  Daniel S. Lynch
                                                      Secretary

New York, New York
June 4, 2002





Contact:
Andrea F. Rabney                                 Stefania A. Bethlen
Vice President                                   Manager
Corporate Communications                         Corporate Communications
ImClone Systems Incorporated                     ImClone Systems Incorporated
(646) 638-5058                                   (646) 638-5046


For Immediate Release
- ---------------------

                  IMCLONE SYSTEMS CONFIRMS 2002 ANNUAL MEETING

New York,  NY - June 4, 2002 --  ImClone  Systems  Incorporated  (Nasdaq:  IMCL)
confirmed today that its annual meeting of shareholders  will take place on June
11,  2002 at  10:00  A.M.  E.T.  at the  Company's  facility  at 33  Chubb  Way,
Somerville, New Jersey.

Shareholders may call (646) 638-6402 for directions to the meeting.

ImClone  Systems  Incorporated  is  committed  to  advancing  oncology  care  by
developing a portfolio of targeted biologic treatments,  designed to address the
medical  needs of  patients  with a variety  of  cancers.  The  Company's  three
programs  include  growth  factor  blockers,  cancer  vaccines and  angiogenesis
inhibitors.   ImClone  Systems'   strategy  is  to  become  a  fully  integrated
biopharmaceutical  company,  taking its  development  programs from the research
stage  to  the  market.  ImClone  Systems  is  headquartered  in New  York  with
additional  administration  and  manufacturing  facilities  in  Somerville,  New
Jersey.

The  matters  discussed  in  this  news  release  may  include   forward-looking
statements which involve  potential risks and  uncertainties.  Important factors
that may cause actual results to differ materially include,  but are not limited
to, the risks and  uncertainties  associated  with  completing  preclinical  and
clinical  trials of the Company's  compounds that  demonstrate  such  compounds'
safety  and  effectiveness;   obtaining  additional  financing  to  support  the
Company's  operations;  obtaining and maintaining  regulatory  approval for such
compounds and complying with other  governmental  regulations  applicable to the
Company's business;  obtaining the raw materials necessary in the development of
such compounds;  consummating collaborative arrangements with corporate partners
for product development;  achieving milestones under collaborative  arrangements
with corporate partners; developing the capacity to manufacture, market and sell
the  Company's  products,   either  directly  or  with  collaborative  partners;
developing  market  demand  for  and  acceptance  of  such  products;  competing
effectively with other pharmaceutical and biotechnological  products;  obtaining
adequate  reimbursement  from third party payers;  attracting  and retaining key
personnel; obtaining patent protection for discoveries and risks associated with
commercial  limitations imposed by patents owned or controlled by third parties.
The Company does not  undertake  any  obligation  to update any  forward-looking
statements, whether as a result of new information, future events or otherwise.




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