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



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


                                                             February 9, 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 - IGEN INTERNATIONAL, 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
                   Under the Securities Exchange Act of 1934

                                (Amendment No. )

                            IGEN INTERNATIONAL, INC.
                    ---------------------------------------
                                NAME OF ISSUER:


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


                                   449536101
                    ---------------------------------------
                                  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                     1,290,139
BENEFICIALLY      6.       SHARED VOTING POWER
OWNED BY                   0
EACH              7.       SOLE DISPOSITIVE POWER
REPORTING                  1,290,139
PERSON WITH       8.       SHARED DISPOSITIVE POWER
                           0

9. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         1,290,139

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

11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

          5.43%

12. TYPE OF REPORTING PERSON

         HC, CO, BK

 * In accordance with Securities Exchange Act Release No. 39538 (January 12,
 1998), this filing reflects the securities beneficially owned by the
 Corporate and Investment Banking business group and the Corporate
 Investments business group (collectively, "CIB") 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
 CIB is, for purposes of Section 13(d) under the Act, the beneficial owner
 of any securities covered by the filing. Furthermore, CIB disclaims
 beneficial ownership of the securities beneficially owned by (i) any client
 accounts with respect to which CIB or its employees have voting or
 investment discretion, or both, and (ii) certain investment entities, of
 which CIB is the general partner, managing general partner, or other
 manager, to the extent interests in such entities are held by persons other
 than CIB.

 ** Under the terms of a no-action letter issued by the SEC staff to Deutsche
 Bank AG on February 14, 2002, Deutsche Bank AG may report beneficial ownership
 for certain non-US subsidiaries on Schedule 13G pursuant to Rule 13d-1(b).
 The reporting person symbols provided in the Instructions to Schedule 13G have
 been used herein (see Question 12, "Type of Reporting Person") to classify
 the non-US subsidiaries eligible for 13G reporting under the SEC's no-action
 letter. In addition, the eligible non-US subsidiaries have been categorized
 herein (see Item 3) consistent with the business generally conducted by
 each such subsidiary.
1





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

         Deutsche Bank AG, London Branch

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                     1,237,568
BENEFICIALLY      6.       SHARED VOTING POWER
OWNED BY                   0
EACH              7.       SOLE DISPOSITIVE POWER
REPORTING                  1,237,568
PERSON WITH       8.       SHARED DISPOSITIVE POWER
                           0

9.   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         1,237,568

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

11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

          5.21%

12.  TYPE OF REPORTING PERSON

         CO, BK






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

         Deutsche Bank Securities 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                     52,571
BENEFICIALLY      6.       SHARED VOTING POWER
OWNED BY                   0
EACH              7.       SOLE DISPOSITIVE POWER
REPORTING                  52,571
PERSON WITH       8.       SHARED DISPOSITIVE POWER
                           0

9.    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

         52,571

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

11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

          0.22%

12. TYPE OF REPORTING PERSON

         BD, CO





Item 1(a).        Name of Issuer:

                  IGEN INTERNATIONAL, INC. ("Issuer")

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

                  16020 Industrial Drive Gaithersburg, MD 20877


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:

                           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 iling is a:

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

                             Deutsche Bank Securities Inc.

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

                             Deutsche Bank AG, London Branch

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

                 (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 Bank AG, London Branch      Bank
                  Deutsche Bank Securities Inc.        Broker /Dealer


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: February 9, 2004






                                           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: February 9, 2004






                                           Deutsche Bank AG, London Branch

                                           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: February 9, 2004






                                         Deutsche Bank Securities Inc.

                                         By: /s/ James T. Byrne, Jr.
                                         Name: James T. Byrne, Jr.
                                         Title: Secretary