UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                  SCHEDULE 13G

                    UNDER THE SECURITIES EXCHANGE ACT OF 1934
                               (AMENDMENT NO. 6)


                              ABN AMRO HOLDING N.V.
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                                (NAME OF ISSUER)


                                 ORDINARY SHARES
--------------------------------------------------------------------------------
                         (TITLE OF CLASS OF SECURITIES)


                                    000937102
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                                 (CUSIP NUMBER)


                                DECEMBER 31, 2003
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                          (DATE OF EVENT WHICH REQUIRES
                            FILING OF THIS STATEMENT)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

[_]  Rule 13d-1(b)
[_]  Rule 13d-1(c)
[X]  Rule 13d-1(d)





CUSIP NO. 000937102                  13G                       PAGE 2 OF 6 PAGES

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   1      NAME OF REPORTING PERSONS
          S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS

          ING Groep N.V.
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   2      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
                                                                         (a) [_]
          Not Applicable                                                 (b) [_]
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   3      SEC USE ONLY


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   4      CITIZENSHIP OR PLACE OF ORGANIZATION

          The Netherlands
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                       5   SOLE VOTING POWER

                           136,785,673 [1]
     NUMBER OF         ---------------------------------------------------------
       SHARES          6   SHARED VOTING POWER
    BENEFICIALLY
    OWNED BY EACH          11,190 [2]
      REPORTING        ---------------------------------------------------------
    PERSON WITH:       7   SOLE DISPOSITIVE POWER

                           136,785,673 [1]
                       ---------------------------------------------------------
                       8   SHARED DISPOSITIVE POWER

                           11,190 [2]
--------------------------------------------------------------------------------
   9      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

          136,796,863
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   10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES
          CERTAIN SHARES                                                   [_]

          Not Applicable
--------------------------------------------------------------------------------
   11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

          8.33% [1], [3]
--------------------------------------------------------------------------------
   12     TYPE OF REPORTING PERSON

          HC
--------------------------------------------------------------------------------

----------

[1]  The total amount of common shares owned represents 4.42% of
     total outstanding capital securities, which vote together as a single class
     on all matters requiring a shareholder vote. The total outstanding capital
     securities includes all common shares, preferred shares and convertible
     preferred shares.

[2]  These shares are held by indirect subsidiaries of ING Groep N.V. in their
     role as a discretionary manager of client portfolios.

[3]  This percentage is based upon 1,641,541,697 issued common shares. Source:
     Euronext Amsterdam.


                                      -2-



ITEM 1(A).    NAME OF ISSUER:

              ABN AMRO Holding N.V.

ITEM 1(B).    ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

              Gustav Mahlerlaan 10
              1082 PP Amsterdam
              The Netherlands

ITEM 2(A).    NAME OF PERSON FILING:

              ING Groep N.V.

ITEM 2(B).    ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:

              Amstelveenseweg 500
              1081 KL Amsterdam
              P.O. Box 810
              1000 AV Amsterdam
              The Netherlands

ITEM 2(C).    CITIZENSHIP:

              See item 4 on Page 2

ITEM 2(D).    TITLE OF CLASS OF SECURITIES:

              Ordinary Shares

ITEM 2(E).    CUSIP NUMBER:

              000937102

ITEM 3.       IF THIS STATEMENT IS FILED PURSUANT TO RULES 13D-1(b), OR 13d-2(b)
              OR (c), CHECK WHETHER THE PERSON FILING IS A: (Not Applicable)

    (a) [_]   Broker or dealer registered under Section 15 of the Securities
              Exchange Act of 1934, as amended (the "Exchange Act");

    (b) [_]   Bank as defined in Section 3(a)(6) of the Exchange Act;

    (c) [_]   Insurance company as defined in Section 3(a)(19) of the Exchange
              Act;


                                      -3-



    (d) [_]   Investment company registered under Section 8 of the Investment
              Company Act of 1940, as amended (the "Investment Company Act");

    (e) [_]   Investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E)
              under the Exchange Act;

    (f) [_]   Employee benefit plan or endowment fund in accordance with Rule
              13d-1(b)(1)(ii)(F) under the Exchange Act;

    (g) [_]   Parent holding company or control person in accordance with Rule
              13d-1(b)(ii)(G) under the Exchange Act;

    (h) [_]   Savings association as defined in Section 3(b) of the Federal
              Deposit Insurance Act;

    (i) [_]   Church plan that is excluded from the definition of an investment
              company under Section 3(c)(14) of the Investment Company Act;

    (j) [_]   Group in accordance with Rule 13d-1(b)(1)(ii)(J) under the
              Exchange Act.

ITEM 4.       OWNERSHIP.

    (a)       Amount beneficially owned:

                          See item 9 on Page 2

    (b)       Percent of class:

                          See item 11 on Page 2

    (c)       Number of shares as to which such person has:

              (i)   Sole power to vote or to direct the vote:

                          See item 5 on Page 2

              (ii)  Shared power to vote or to direct the vote:

                          See item 6 on Page 2

              (iii) Sole power to dispose or to direct the disposition of:



                                      -4-




                          See item 7 on Page 2

              (iv)  Shared power to dispose or to direct the disposition of:

                          See item 8 on Page 2

ITEM 5.       OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS.

              Not Applicable

ITEM 6.       OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

              Not Applicable

ITEM 7.       IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
              THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY OR
              CONTROL PERSON.

              Not Applicable

ITEM 8.       IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP.

              Not Applicable

ITEM 9.       NOTICE OF DISSOLUTION OF GROUP.

              Not Applicable

ITEM 10.      CERTIFICATION.

              Not Applicable


                                      -5-


                                   SIGNATURE

         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.

                                             February 3, 2004
                                             -----------------------------------
                                             (Date)



                                             ING GROEP N.V.


                                             By:


                                             /s/ CORNELIS F. DRABBE
                                             -----------------------------------
                                             (Signature)

                                             Cornelis F. Drabbe,
                                             Assistant General Counsel
                                             -----------------------------------
                                             (Name/Title)


                                             /s/ BERT H. UYTTENBROEK
                                             -----------------------------------
                                             (Signature)


                                             Bert H. Uyttenbroek,
                                             Compliance Officer
                                             -----------------------------------
                                             (Name/Title)