UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                    Under the Securities Exchange Act of 1934
                                (Amendment No. 1)

                         KERYX BIOPHARMACEUTICALS, INC.
                                (Name of Issuer)

                     COMMON STOCK, PAR VALUE $.001 PER SHARE
                         (Title of Class of Securities)

                                    492515101
                                 (CUSIP Number)

                            Lindsay A. Rosenwald, MD
                         787 Seventh Avenue, 48th Floor
                               New York, NY 10019
                                 (212) 554-4300

            (Name, Address and Telephone Number of Person Authorized
                     to Receive Notices and Communications)

                                  May 15, 2003
             (Date of Event which Requires Filing of this Statement)

If the filing person has previously  filed a statement on Schedule 13G to report
the  acquisition  that is the subject of this  Schedule  13D, and is filing this
schedule because of Sections 240.13d-1(e),  240.13d-1(f) or 240.13d-1(g),  check
the following box. [ ]

Note.  Schedules  filed in paper format shall include a signed original and five
copies of the schedule,  including all exhibits. See Section 240.13d-7 for other
parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting  person's
  initial  filing on this form with respect to the subject class of  securities,
  and for any  subsequent  amendment  containing  information  which would alter
  disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the  Securities  Exchange  Act of
1934 ("Act") or otherwise  subject to the liabilities of that section of the Act
but  shall be  subject  to all other  provisions  of the Act  (however,  see the
Notes).


                         Continued on following page(s)

                                  Page 1 of 5



------------------------------------              ------------------------------
           CUSIP No. 492515101       SCHEDULE 13D

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1          NAMES OF REPORTING PERSONS
           S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

           Lindsay A. Rosenwald, M.D.

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2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
                                                               (a)  (b)


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3          SEC USE ONLY

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4          SOURCE OF FUNDS (See Instructions)
           OO (see Item 3 below)


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5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEM 2(d) or 2(e)



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6          CITIZENSHIP OR PLACE OF ORGANIZATION
           United States


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            NUMBER OF SHARES              7         SOLE VOTING POWER
          BENEFICIALLY OWNED BY                     3,017,523
          EACH REPORTING PERSON
                  WITH                    --------------------------------------
                                          8         SHARED VOTING POWER
                                                    194,600

                                          --------------------------------------
                                          9         SOLE DISPOSITIVE POWER
                                                    3,017,523

                                          --------------------------------------
                                          10        SHARED DISPOSITIVE POWER
                                                    194,600

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11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
           3,212,123

--------------------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 11 EXCLUDES CERTAIN SHARES
           (See Instructions)


--------------------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
           15.8%


--------------------------------------------------------------------------------
14         TYPE OF REPORTING PERSON (See Instructions)
           IN


--------------------------------------------------------------------------------




Item 1.  Item 1.  Security and Issuer.
                  -------------------

         (a) Common Stock, $.001 par value ("Shares")


                                  Page 2 of 5



                  Keryx Biopharmaceuticals, Inc. (the "Issuer")
                  750 Lexington Avenue
                  New York, NY 10022
                  (212) 531-5965

Item 2.  Identity and Background.
         -----------------------

         Names of Persons Filing:

         (a)      This statement is filed on behalf of Lindsay A. Rosenwald,
                  M.D. ("Dr. Rosenwald" or the "Reporting Party").

         (b)      Dr. Rosenwald's business address is 787 Seventh Avenue, 48th
                  Floor, New York, New York, 10019.

         (c)      Dr. Rosenwald is an investment banker, venture capitalist and
                  fund manager.

         (d)      Dr. Rosenwald, has not, during the five years prior to the
                  date hereof, been convicted in a criminal proceeding
                  (excluding traffic violations or similar misdemeanors).

         (e)      Dr. Rosenwald has not been, during the five years prior to the
                  date hereof, parties to a civil proceeding of a judicial or
                  administrative body of competent jurisdiction, as a result of
                  which such person was or is subject to a judgment, decree or
                  final order enjoining future violations of, or prohibiting or
                  mandating activities subject to, Federal or State securities
                  laws or finding any violation with respect to such laws.

         (f)      Dr. Rosenwald is a citizen of the United States.

Item 3.  Source and Amount of Funds or Other Consideration.
         -------------------------------------------------

                  The Reporting Parties sold Shares of the Issuer in a single
                  transaction to the Rosenwald 2000 Family Trust, a trust
                  established for the benefit of Dr. Rosenwald's minor children
                  (the "Family Trust") at a price per share equal to $1.36. Dr.
                  Rosenwald does not control the right to vote or dispose of the
                  shares held by the Family Trust.

Item 4.  Purpose of Transaction.
         ----------------------

                  Except as indicated in this Schedule 13D, the Reporting Party
                  currently has no plans or proposals that relate to or would
                  result in any of the matters described in subparagraphs (a)
                  through (j) of Item 4 of Schedule 13D.

Item 5.  Interest in Securities of the Issuer.
         ------------------------------------

                  (a)      As of May 15, 2002, Dr. Rosenwald beneficially owned
                           3,209,623 Shares or 15.8% of the total amount of
                           Shares outstanding assuming the exercise of all of
                           the securities held by the following:



                                                     Percent            Amount Owned
                                                     -------           ----------------
                                                                 
                           Dr. Rosenwald             15.8%             2,714,428 Shares




                                  Page 3 of 5





                                                     Percent            Amount Owned
                                                     -------           ----------------
                                                                 
                                                                       14,064 warrants to purchase Shares
                                                                       10,000 director's options

                           Paramount Capital
                           Investments, LLC         1.5%               250,485 Shares and
                                                                       50,110 warrants to purchase Shares

                           Paramount Capital
                           Asset Management, Inc.   0.9%               194,600 Shares


                  (b)      Dr. Rosenwald is the Chairman and sole stockholder
                           of Paramount Capital Asset Management, Inc. ("PCAM"),
                           which is the manager of several investment funds
                           that own shares of the Issuer and Paramount Capital
                           Investment, LLC. Dr. Rosenwald and PCAM share the
                           power to vote or to direct the vote, to dispose or
                           to direct the disposition of those shares owned by
                           such funds.

                  (c)      Other than as otherwise set forth herein the
                           Reporting Parties have not engaged in any
                           transactions in Shares during the past 60 days.

                  (d)      Not applicable

                  (e)      Not applicable.

Item     6. Contracts, Arrangements, Understandings or Relationships with
         respect to Securities of the Issuer:
         ------------------------------------

                  Item 4 is herein incorporated by reference. In addition, Dr.
                  Rosenwald serves as the Chairman of the Board of Directors of
                  the Issuer.

Item 7.  Material to be Filed as Exhibits:
         --------------------------------

                  None.

                                  Page 4 of 5






                                   SIGNATURES


     After  reasonable  inquiry and to the best of my  knowledge  and belief,  I
certify that the information  set forth in this statement is true,  complete and
correct.


Dated:            May 15, 2003
                  New York, NY              By: /s/ Lindsay A. Rosenwald, M.D.
                                                --------------------------
                                                Lindsay A. Rosenwald, M.D.

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