SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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                                    FORM 6-K

                            Report of Foreign Issuer

                        Pursuant to Rule 13a-16 or 15d-16

                    under the Securities Exchange Act of 1934

                              Dated August 24, 2005

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                        Commission File Number: 001-14666

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                            MITTAL STEEL COMPANY N.V.

                 (Translation of registrant's name into English)

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                             15th Floor, Hofplein 20
                                3032 AC Rotterdam
                                 The Netherlands
              (Address of registrant's principal executive offices)
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         Indicate by check mark whether the registrant files or will file annual
reports under cover Form 20-F or Form 40-F.

                            Form 20-F  X    Form 40-F
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         Indicate by check mark if the registrant is submitting the Form 6-K in
paper as permitted by Regulation S-T Rule 101(b)(1):  X
                                                     ---

         Indicate by check mark if the registrant is submitting the Form 6-K in
paper as permitted by Regulation S-T Rule 101(b)(7):
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         Indicate by check mark whether by furnishing the information contained
in this Form, the registrant is also thereby furnishing the information to the
Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

                                    Yes      No  X
                                       ---      ---

       If "Yes, is marked, indicate below the file number assigned to the
              registrant in connection with Rule 12g3-2(b): 82-______.





Mittal Steel Company N.V. hereby incorporates this Report on Form 6-K by
reference into its Registration Statement on Form S-8 (Registration No.
333-107102), filed with the Securities and Exchange Commission under the
Securities Act of 1933, as amended (the "Securities Act"), to the extent not
superseded by documents or reports subsequently filed by Mittal Steel Company
N.V. under the Securities Act or the Securities Exchange Act of 1934, as
amended.



INDEX
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Exhibit 99.1      English summary of report made to the Autoriteit Financiele
                  Markten relating to the grant of stock options to certain
                  executive board members, members of senior management and key
                  employees of Mittal Steel Company N.V.




                                   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, thereunto duly authorized.

                                            MITTAL STEEL COMPANY N.V.


Date:  August 24, 2005                      By:  /s/ Henk Scheffer
                                                 ---------------------------
                                            Name:  Henk Scheffer
                                            Title: Company Secretary






                                  EXHIBIT INDEX
                                  -------------


Exhibit 99.1      English summary of report made to the Autoriteit Financiele
                  Markten relating to the grant of stock options to certain
                  executive board members, members of senior management and key
                  employees of Mittal Steel Company N.V.