FILE NO. 333-67335
FILED PURSUANT TO RULE 424(b)(3)
IMCLONE SYSTEMS INCORPORATED
SUPPLEMENT NO. 1
TO PROSPECTUS DATED February 3, 1999
RELATING TO 30,000 SHARES OF COMMON STOCK, $.001 PAR VALUE
The list of selling stockholders commencing on page 18 of the prospectus
is hereby amended to reflect Jack & Sabina Waksal as a Selling Stockholder of
30,000 shares of Common Stock as a result of a gift of such shares by Selling
Stockholder, Harlan W. Waksal. The information with respect to Jack & Sabina
Waksal reads in its entirety as follows:
NUMBER OF NUMBER OF
SHARES OF SHARES OF
COMMON STOCK NUMBER OF COMMON STOCK
NAME OF SELLING OWNED PRIOR SHARES OWNED AFTER
STOCKHOLDER TO OFFERING OFFERED THE OFFERING
Jack & Sabina Waksal 265,000 30,000 235,000
The initially capitalized terms used herein shall have the same meaning as
specified in the Prospectus.
THE DATE OF THIS SUPPLEMENT IS April 29, 1999
