Deutsche Bank AG
Taunusanlage 12, D-60325
Frankfurt am Main
Federal Republic of Germany



Jeffrey A. Ruiz
Vice President
Telephone: (212) 250-3667


                                                February 10, 2004


Securities and Exchange Commission
SEC Document Control
450 Fifth Street, N.W.
Washington, DC  20549
Attn:  Filing Desk


Dear Sir or Madame:

         Re:  Filing of Schedule 13G - Investment Technology Group, Inc.


Pursuant to Rule 13d-1 of the Securities Exchange Act of 1934, attached is one
copy of Schedule 13G with respect to the common stock of the above referenced
corporation.

Please acknowledge your receipt of the Schedule 13G by return e-mail
confirmation.

                                                Sincerely,



                                               Jeffrey A. Ruiz



Enclosures






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

                                  SCHEDULE 13G
                                (Amendment No. )

                   Under the Securities Exchange Act of 1934

                       Investment Technology Group, Inc.
                    _______________________________________
                                NAME OF ISSUER:


                        Common Stock ($0.001 Par Value)
                    _______________________________________
                          TITLE OF CLASS OF SECURITIES

                                   46145F105
                    _______________________________________
                                  CUSIP NUMBER


                               December 31, 2003
                    _______________________________________
            (Date of Event Which Requires Filing of this Statement)


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

                               [X] Rule 13d-1(b)

                               [ ] Rule 13d-1(c)

                               [ ] Rule 13d-1(d)





1.  NAME OF REPORTING PERSONS
    S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         Deutsche Bank AG*

2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

          (A) [ ]
          (B) [ ]

3.  SEC USE ONLY

4.  CITIZENSHIP OR PLACE OF ORGANIZATION

    Federal Republic of Germany

NUMBER OF         5.     SOLE VOTING POWER
SHARES                   2,943,191
BENEFICIALLY      6.     SHARED VOTING POWER
OWNED BY                 0
EACH              7.     SOLE DISPOSITIVE POWER
REPORTING                3,009,155
PERSON WITH       8.     SHARED DISPOSITIVE POWER


9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         3,009,155

10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES
                    [  ]

11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

         6.44%

12.  TYPE OF REPORTING PERSON

         HC, CO

*In  accordance with Securities  Exchange Act Release No. 39538  (January 12,
1998),  this filing  reflects the securities  beneficially owned by the Private
Clients and Asset Management business group ("PCAM") of Deutsche Bank AG and its
subsidiaries and affiliates (collectively, "DBAG"). This filing does not reflect
securities,  if any,  beneficially  owned by any other business group of DBAG.
Consistent  with Rule 13d-4 under the Securities Exchange Act of 1934 ("Act"),
this filing shall not be construed as an admission that PCAM is, for purposes of
Section 13(d) under the Act, the beneficial owner of any securities covered by
the filing.





1.  NAME OF REPORTING PERSONS
    S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         Deutsche Investment Management Americas Inc.

2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
          (A)     [  ]
          (B)     [  ]


3.  SEC USE ONLY

4.  CITIZENSHIP OR PLACE OF ORGANIZATION

         Delaware

NUMBER OF         5.    SOLE VOTING POWER
SHARES                  1,676,601
BENEFICIALLY      6.    SHARED VOTING POWER
OWNED BY
EACH              7.    SOLE DISPOSITIVE POWER
REPORTING               1,676,601
PERSON WITH       8.    SHARED DISPOSITIVE POWER


9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         1,676,601

10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES
                    [  ]

11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

         3.58%

12.      TYPE OF REPORTING PERSON

     IA, CO







1.  NAME OF REPORTING PERSONS
    S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS

         Deutsche Bank Trust Company Americas

2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

          (A)     [  ]
          (B)     [  ]


3.  SEC USE ONLY

4.  CITIZENSHIP OR PLACE OF ORGANIZATION

    Delaware

NUMBER OF         5.       SOLE VOTING POWER
SHARES                     1,266,590
BENEFICIALLY      6.       SHARED VOTING POWER
OWNED BY                   0
EACH              7.       SOLE DISPOSITIVE POWER
REPORTING                  1,332,554
PERSON WITH       8.       SHARED DISPOSITIVE POWER


9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         1,332,554

10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW 9 EXCLUDES CERTAIN SHARES
                    [  ]

11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

         2.85%

12.  TYPE OF REPORTING PERSON

         BK, CO







Item 1(a).        Name of Issuer:

                  Investment Technology Group, Inc.  (the "Issuer")

Item 1(b).        Address of Issuer's Principal Executive Offices:

                    380 Madison Avenue, New York, NY 10017

Item 2(a).        Name of Person Filing:

                  This statement is filed on behalf of Deutsche Bank AG,
                  ("Reporting Person").

Item 2(b).        Address of Principal Business Office or, if none, Residence:

                  The principal place of business of the Reporting Person is:

                           Taunusanlage 12, D-60325
                           Frankfurt am Main
                           Federal Republic of Germany

Item 2(c).        Citizenship:

                  The citizenship of the Reporting Person is set forth on the
                  cover page.

Item 2(d).        Title of Class of Securities:

                  The title of the securities is common stock, $0.001 par value
                  ("Common Stock").

Item 2(e).        CUSIP Number:

                  The CUSIP number of the Common Stock is set forth on the
                  cover page.

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:

                 (a) [ ] Broker or dealer registered under section 15 of the
                         Act;

                 (b) [X] Bank as defined in section 3(a)(6) of the Act;

                          Deutsche Bank Trust Company Americas

                 (c) [ ] Insurance Company as defined in section 3(a)(19) of
                         the Act;

                 (d) [ ] Investment Company registered under section 8 of the
                         Investment Company Act of 1940;

                 (e) [X] An investment adviser in accordance with Rule 13d-1(b)
                         (1)(ii)(E);

                         Deutsche Investment Management Company Americas,Inc.

                 (f) [ ] An employee benefit plan, or endowment fund in
                         accordance with Rule 13d-1 (b)(1)(ii)(F);

                 (g) [X] Parent holding company or control person in
                         accordance with Rule 13d-1 (b)(1)(ii)(G);

                          Deutsche Bank AG

                 (h) [ ] A savings association as defined in section 3(b) of
                         the Federal Deposit Insurance Act;

                 (i) [ ] A church plan that is excluded from the definition of
                         an investment company under section 3(c)(14) of the
                         Investment Company Act of 1940;

                 (j) [ ] Group, in accordance with Rule 13d-1 (b)(1)(ii)(J).

Item 4.           Ownership.

           (a)    Amount beneficially owned:

                  The Reporting Person owns the amount of the Common Stock as
                  set forth on the cover page.

           (b)    Percent of class:

                  The Reporting Person owns the percentage of the Common Stock
                  as set forth on the cover page.

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

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

                     The Reporting Person has the sole power to vote or direct
                     the vote of the Common Stock as set forth on the cover
                     page.

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

                     The Reporting Person has the shared power to vote or
                     direct the vote of the Common Stock as set forth on the
                     cover page.

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

                     The Reporting Person has the sole power to dispose or
                     direct the disposition of the Common Stock as set forth
                     on the cover page.

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

                     The Reporting Person has the shared power to dispose or
                     direct the disposition of the Common Stock as set forth on
                     the cover page.

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.

                  Subsidiary                   Item 3 Classification
                  ---------------------------------------------------------

                  Deutsche Investment Management           Investment Advisor
                    Americas, Inc.

                  Deutsche Bank Trust Company              Bank
                    Americas



Item 8.           Identification and Classification of Members of the Group.

                  Not applicable.

Item 9.           Notice of Dissolution of Group.

                  Not applicable.

Item 10.          Certification.

By signing below I certify that, to the best of my knowledge and belief, the
securities referred to above were acquired and are held in the ordinary course
of business and were not acquired and are not held for the purpose of or with
the effect of changing or influencing the control of the issuer of the
securities and were not acquired and are not held in connection with or as a
participant in any transaction having that purpose or effect.








                                   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.

Dated: 2/10/04

                                                  DEUTSCHE BANK AG


                                                  By: /s/ Jeffrey A. Ruiz
                                                  Name: Jeffrey A. Ruiz
                                                  Title: Vice President

                                                  By: /s/ Pasquale Antolino
                                                  Name: Pasquale Antolino
                                                  Title: Associate











                                   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.



Dated: 2/10/04


                                Deutsche Investment Management Americas Inc.


                                By: /s/ Jeffrey A. Ruiz
                                Name: Jeffrey A. Ruiz
                                Title: Vice President











                                   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.

Dated: 2/10/04


                                    Deutsche Bank Trust Company Americas


                                    By: /s/ Jeffrey A. Ruiz
                                    Name: Jeffrey A. Ruiz
                                    Title: Vice President