SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                  SCHEDULE 13G
                    Under the Securities Exchange Act of 1934




                          THE NASDAQ STOCK MARKET, INC.
                                (Name of Issuer)



                     Common Stock, par value $0.01 per share
                     ---------------------------------------
                         (Title of Class of Securities)



                                     631103
                                     ------
                                 (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:

|_|     Rule 13d-1(b)
|_|     Rule 13d-1(c)
|X|     Rule 13d-1(d)


                               Page 1 of 4 Pages

SCHEDULE 13G - ----------------------- ------------------------ CUSIP No. 631103 Page 2 of 4 Pages - ----------------------- ------------------------ - -------------------------------------------------------------------------------- 1 NAME OF REPORTING PERSONS I.R.S. IDENTIFICATION NO. OF ABOVE PERSON (ENTITIES ONLY) The National Association of Securities Dealers, Inc. IRS # 53-0088710 - -------------------------------------------------------------------------------- 2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a) |_| Not applicable (b) |_| - -------------------------------------------------------------------------------- 3 SEC USE ONLY - -------------------------------------------------------------------------------- 4 CITIZENSHIP OR PLACE OF ORGANIZATION Delaware - -------------------------------------------------------------------------------- 5 SOLE VOTING POWER NUMBER OF 43,190,146 SHARES ----------------------------------------------- BENEFICIALLY 6 SHARED VOTING POWER OWNED BY EACH ----------------------------------------------- REPORTING 7 SOLE DISPOSITIVE POWER PERSON WITH 10,770,664 ----------------------------------------------- 8 SHARED DISPOSITIVE POWER - -------------------------------------------------------------------------------- 9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 43,190,146 - -------------------------------------------------------------------------------- 10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (See Instructions) |_| - -------------------------------------------------------------------------------- 11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 55.1% - -------------------------------------------------------------------------------- 12 TYPE OF REPORTING PERSON OO - -------------------------------------------------------------------------------- Page 2 of 4 Pages

SCHEDULE 13G ------------ Item 1 (a) Name of Issuer: The Nasdaq Stock Market, Inc. Item 1 (b) Address of Issuer's Principal Executive Offices: One Liberty Plaza New York, New York 10006 Item 2 (a) Name of Person Filing: The National Association of Securities Dealers, Inc. Item 2 (b) Address of Principal Business Office: 1735 K Street, N.W. Washington, DC 20006 Item 2 (c) Citizenship: Delaware Item 2 (d) Title of Class of Securities: Common Stock, par value $0.01 per share Item 2 (e) CUSIP Number: 631103 Item 3 Not Applicable Item 4 Ownership: (a) Amount Beneficially Owned: 43,190,146 (b) Percent of Class: 55.1% (c) Number of Shares as to which the person has: (i) Sole power to vote or to direct the vote: 43,190,146 (ii) Shared power to vote or to direct the vote: (iii) Sole power to dispose or to direct the disposition of: 10,770,664 (iv) Shared power to dispose or to direct the disposition of: Item 5 Ownership of Five Percent or Less of a Class: Not Applicable Page 3 of 4 Pages

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 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 13, 2004 /s/ Todd T. Diganci - -------------------------- Signature Name: Todd T. Diganci Title: Executive Vice President and Chief Financial Officer Page 4 of 4 Pages