This Prospectus Supplement filed pursuant to Rule 424(b)(3)
Registration No. 333-87197
PROSPECTUS SUPPLEMENT
This is a Supplement, dated September 15, 2000, to the Prospectus, dated
October 4, 1999, with respect to shares of common stock to be offered and sold
by certain selling stockholders, including Citiventure 96 Partnership, L.P.,
Chancellor LGT Private Capital Offshore Partners II, L.P. and Chancellor LGT
Private Capital III, L.P. (the "Chancellor Selling Stockholders"). In order to
reflect the change in shares to be offered by the Chancellor Selling
Stockholders and the addition of Deutsche Bank AG as a selling stockholder (the
"DB Selling Stockholder"), the tabular information appearing on page 11 as it
pertains to the Chancellor Selling Stockholders is hereby supplemented as
follows:
The following table sets forth information with respect to the Chancellor
Selling Stockholders and the DB Selling Stockholder and the respective number of
shares of common stock beneficially owned by each Chancellor Selling Stockholder
and the DB Selling Stockholder that may be offered pursuant to this Prospectus:
Selling Stockholders Number of Shares
-------------------- ----------------
Citiventure 96 Partnership, L.P. 689,593(1)
Chancellor LGT Private Capital 339,362(2)
Offshore Partners II, L.P.
Chancellor LGT Private Capital III, L.P. 178,738(3)
Deutsche Bank AG 350,000(4)
The foregoing share amounts reflect the three-for-one stock split effected by
the Company after the effective date of the Registration Statement, which
incorporated the Prospectus.
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(1) Represents 689,593 shares of common stock issuable upon exercise of Celgene
warrants.
(2) Represents 339,362 shares of common stock issuable upon exercise of Celgene
warrants.
(3) Represents 178,738 shares of common stock issuable upon exercise of Celgene
warrants.
(4) Represents 350,000 shares of common stock issuable upon exercise of Celgene
warrants.
