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                                  United States
                       Securities and Exchange Commission
                             Washington, D.C. 20549

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                                    FORM 8-K

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                                 Current Report
                     Pursuant to Section 13 or 15(D) of the
                         Securities Exchange Act of 1934



                  May 28, 2003                                    0-16132
- ------------------------------------------------         ----------------------
Date of Report (Date of earliest event reported)         Commission File Number


                               CELGENE CORPORATION
             (Exact name of registrant as specified in its charter)

           Delaware                                      22-2711928
- -------------------------------         ---------------------------------------
(State or other jurisdiction of         (I.R.S. Employer Identification Number)
incorporation or organization)


                               7 Powder Horn Drive
                            Warren, New Jersey 07059
               ---------------------------------------------------
               (Address of Principal Executive Offices) (Zip Code)

                                 (732) 271-1001
               ---------------------------------------------------
              (Registrant's telephone number, including area code)







Item 5.     Other Events.

On May 28, 2003,  Celgene  Corporation  (the  "Company")  issued a press release
announcing  its  intention to offer a new issue of $300  million of  Convertible
Notes due 2008 to qualified  institutional  buyers in an  unregistered  offering
pursuant  to Rule  144A  under  the  Securities  Act of 1933,  as  amended  (the
"Securities  Act").  These Notes will be convertible  into the Company's  common
stock at a price to be determined.  A copy of the Company's press release issued
on May 28,  2003  pursuant  to Rule 135c of the  Securities  Act is  attached as
Exhibit 99.1 hereto and is incorporated herein by reference.

On May 29,  2003,  the Company  issued a press  release  announcing  that it had
agreed to privately place $325 million aggregate principal amount of Convertible
Notes due 2008 ($25 million more than previously announced). These Notes will be
convertible  into Celgene  Corporation  common  stock at a  conversion  price of
$48.45 per share  (reflecting a premium of 50%,  relative to the NASDAQ  closing
price  for  Celgene  common  stock of  $32.30  on May 28,  2003),  and will bear
interest  at a rate of 1.75% per annum.  The  Company  has  granted  the initial
purchaser  of the Notes a 30-day  option to purchase an  additional  $75 million
principal amount of the Notes. The offering of the notes,  which will be made to
qualified institutional buyers as defined in Rule 144A of the Securities Act, is
expected to close on June 3, 2003. A copy of the Company's  press release issued
on May 29,  2003  pursuant  to Rule 135c of the  Securities  Act is  attached as
Exhibit 99.2 hereto and is incorporated herein by reference.

On May 30, 2003, the Company issued a press release  announcing that the initial
purchaser of $325 million of its 1.75% Convertible Notes due 2008 has elected to
exercise its option to purchase an additional  $75 million  principal  amount of
such Notes. As a result, the final aggregate principal amount of the offering of
the Notes will be $400 million.  A copy of the Company's press release issued on
May 30, 2003 pursuant to Rule 135c of the  Securities Act is attached as Exhibit
99.3 hereto and is incorporated herein by reference.

The  securities  described in this Form 8-K have not been  registered  under the
Securities Act, or any state  securities laws, and may not be offered or sold in
the United States absent  registration  under, or an applicable  exemption from,
the  registration  requirements  of the  Securities  Act  and  applicable  state
securities  laws.  This  Form  8-K does not  constitute  an offer to sell  these
securities  nor is it a solicitation  of an offer to purchase these  securities.
The  statements  in this  Form 8-K  regarding  future  aspects  relating  to the
offering and other statements which are not historical facts are forward-looking
statements that involve risks and uncertainties,  including, but not limited to,
market and competitive  conditions,  that may cause actual future experience and
results to differ materially from the statements made.

Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits.

    (a)  Not applicable.

    (b)  Not applicable.

    (c)  Exhibits:
         --------




    Exhibit Number                                         Description
    --------------                                         -----------
         99.1               Press Release of Celgene Corporation dated May 28,
                            2003 issued pursuant to Rule 135c of the Securities
                            Act.

         99.2               Press Release of Celgene Corporation dated May 29,
                            2003 issued pursuant to Rule 135c of the Securities
                            Act.

         99.3               Press Release of Celgene Corporation dated May 30,
                            2003 issued pursuant to Rule 135c of the Securities
                            Act.





                                   SIGNATURES

     Pursuant to the  requirements  of the Securities  Exchange Act of 1934, the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.



                 CELGENE CORPORATION

Dated: June 5, 2003



                 By:  /s/ Robert J. Hugin
                  ------------------------------
                 Name: Robert J. Hugin
                 Title: Senior Vice President and
                 Chief Financial Officer







                                  EXHIBIT INDEX


       Exhibit                             Description
       -------                             -----------

         99.1          Press Release of Celgene Corporation dated May 28, 2003
                       issued pursuant to Rule 135c of the Securities Act.

         99.2          Press Release of Celgene Corporation dated May 29, 2003
                       issued pursuant to Rule 135c of the Securities Act.

         99.3          Press Release of Celgene Corporation dated May 30, 2003
                       issued pursuant to Rule 135c of the Securities Act.




                                                                   Exhibit 99.1

                                            Contact: Robert J. Hugin
                                                     Senior VP and CFO
                                                     Celgene Corporation
                                                     (732) 271-4102


 Celgene Corporation Announces Proposed $300 Million Convertible Notes Offering


WARREN, NJ - (May 28, 2003) - Celgene Corporation (NASDAQ: CELG) announced today
that it proposes to offer a new issue of $300 million of  Convertible  Notes due
2008 through a Rule 144A offering to qualified institutional buyers. These Notes
will be  convertible  into  Celgene  Corporation  common  stock at a price to be
determined.

The Notes and the common stock  issuable  upon  conversion of the Notes have not
been  registered  under the  Securities  Act of 1933, as amended,  or applicable
state securities  laws, and unless so registered,  may not be offered or sold in
the  United  States,  except  pursuant  to  an  applicable  exemption  from  the
registration  requirements  of the  Securities  Act of  1933,  as  amended,  and
applicable state securities laws.

This press release shall not constitute an offer to sell or the  solicitation of
an offer to sell or the  solicitation  of an offer to buy the Notes.  This press
release is being issued  pursuant to and in accordance  with Rule 135c under the
Securities Act of 1933, as amended.

Celgene  Corporation,  headquartered  in Warren,  New Jersey,  is an  integrated
biopharmaceutical  company engaged  primarily in the discovery,  development and
commercialization   of  novel   therapies   for  the  treatment  of  cancer  and
inflammatory diseases through gene and protein regulation. For more information,
please visit the Company's website at www.celgene.com.

This release contains certain forward-looking statements which involve known and
unknown risks,  delays,  uncertainties and other factors not under the Company's
control,  which may cause actual  results,  performance or  achievements  of the
Company  to be  materially  different  from the  results,  performance  or other
expectations implied by these forward-looking statements.  These factors include
results of current or pending  research and development  activities,  actions by
the FDA and other  regulatory  authorities,  and those  factors  detailed in the
Company's  filings with the Securities and Exchange  Commission such as 10K, 10Q
and 8K reports.





                                                                    Exhibit 99.2

                                            Contact: Robert J. Hugin
                                                     Senior VP and CFO
                                                     Celgene Corporation
                                                     (732) 271-4102

 Celgene Corporation Announces Pricing of $325 Million Convertible Note Offering

      - Transaction Highlights: 1.75% Coupon and 50.0% Conversion Premium -

WARREN, NJ - (May 29, 2003) - Celgene Corporation (NASDAQ: CELG) announced today
that it agreed to privately  place $325 million  aggregate  principal  amount of
Convertible  Notes  due 2008.  These  Notes  will be  convertible  into  Celgene
Corporation common stock at a conversion price of $48.45 per share (reflecting a
premium of 50%, relative to the NASDAQ closing price for Celgene common stock of
$32.30 on May 28,  2003),  and will bear  interest at a rate of 1.75% per annum.
The Company has granted the initial  purchaser  of the Notes a 30-day  option to
purchase an additional $75 million  principal amount of the Notes. The placement
of the notes is expected to close on June 3, 2003.

Celgene  expects to use the net proceeds of the  offering for general  corporate
purposes.  The Notes will be  convertible  into shares of the  Company's  common
stock upon the occurrence of certain events. The offering is being made by means
of an offering  memorandum to qualified  institutional  buyers  pursuant to Rule
144A of the Securities Act of 1933, as amended.

The Notes and the common stock  issuable  upon  conversion of the Notes have not
been  registered  under the  Securities  Act of 1933, as amended,  or applicable
state securities  laws, and unless so registered,  may not be offered or sold in
the  United  States,  except  pursuant  to  an  applicable  exemption  from  the
registration  requirements  of the  Securities  Act of  1933,  as  amended,  and
applicable state securities laws.

This press release shall not constitute an offer to sell or the  solicitation of
an offer to sell or the  solicitation  of an offer to buy the Notes.  This press
release is being issued  pursuant to and in accordance  with Rule 135c under the
Securities Act of 1933, as amended.

Celgene  Corporation,  headquartered  in Warren,  New Jersey,  is an  integrated
biopharmaceutical  company engaged  primarily in the discovery,  development and
commercialization   of  novel   therapies   for  the  treatment  of  cancer  and
inflammatory diseases through gene and protein regulation. For more information,
please visit the Company's website at www.celgene.com.

This release contains certain forward-looking statements which involve known and
unknown risks,  delays,  uncertainties and other factors not under the Company's
control,  which may cause actual  results,  performance or  achievements  of the
Company  to be  materially  different  from the  results,  performance  or other
expectations implied by these forward-looking statements.  These factors include
results of current or pending  research and development  activities,  actions by
the FDA and other  regulatory  authorities,  and those  factors  detailed in the
Company's  filings with the Securities and Exchange  Commission such as 10K, 10Q
and 8K reports.




                                                                    Exhibit 99.3

                                            Contact: Robert J. Hugin
                                                     Senior VP and CFO
                                                     Celgene Corporation
                                                     (732) 271-4102


 Initial Purchaser Exercises Option to Purchase an Additional $75 Million of the
                    $325 Million of 1.75% Convertible Notes


WARREN, NJ - (May 30, 2003) - Celgene Corporation (NASDAQ: CELG) announced today
that the initial  purchaser of $325 million of its 1.75%  Convertible  Notes due
2008 has elected to exercise  its option to purchase an  additional  $75 million
principal  amount of such  Notes.  As a result,  the final  aggregate  principal
amount of the  offering of the Notes will be $400  million.  These Notes will be
convertible  into Celgene  Corporation  common  stock at a  conversion  price of
$48.45 per share  (reflecting a premium of 50%,  relative to the NASDAQ  closing
price for Celgene common stock of $32.30 on May 28, 2003).  The placement of the
Notes is expected to close on June 3, 2003.

As previously announced, Celgene expects to use the net proceeds of the offering
for  general  corporate  purposes.  The  offering  is being  made by means of an
offering memorandum to qualified  institutional  buyers pursuant to Rule 144A of
the Securities Act of 1933, as amended.

The Notes and the common stock  issuable  upon  conversion of the Notes have not
been  registered  under the  Securities  Act of 1933, as amended,  or applicable
state securities  laws, and unless so registered,  may not be offered or sold in
the  United  States,  except  pursuant  to  an  applicable  exemption  from  the
registration  requirements  of the  Securities  Act of  1933,  as  amended,  and
applicable state securities laws.

This press release shall not constitute an offer to sell or the  solicitation of
an offer to sell or the  solicitation  of an offer to buy the Notes.  This press
release is being issued  pursuant to and in accordance  with Rule 135c under the
Securities Act of 1933, as amended.

Celgene  Corporation,  headquartered  in Warren,  New Jersey,  is an  integrated
biopharmaceutical  company engaged  primarily in the discovery,  development and
commercialization   of  novel   therapies   for  the  treatment  of  cancer  and
inflammatory diseases through gene and protein regulation. For more information,
please visit the Company's website at www.celgene.com.

This release contains certain forward-looking statements which involve known and
unknown risks,  delays,  uncertainties and other factors not under the Company's
control,  which may cause actual  results,  performance or  achievements  of the
Company  to be  materially  different  from the  results,  performance  or other
expectations implied by these forward-looking statements.  These factors include
results of current or pending  research and development  activities,  actions by
the FDA and other  regulatory  authorities,  and those  factors  detailed in the
Company's  filings with the Securities and Exchange  Commission such as 10K, 10Q
and 8K reports.