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

                                 --------------

                                   FORM 10-K/A

        FOR ANNUAL AND TRANSITION REPORTS PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

(MARK ONE) [X]    ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                   FOR THE FISCAL YEAR ENDED DECEMBER 31, 2004

                                       OR
           [ ]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                        FOR THE TRANSITION PERIOD FROM TO

                         COMMISSION FILE NUMBER 0-28191

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                                  ESPEED, INC.
             (Exact Name of Registrant as Specified in Its Charter)


               DELAWARE                                 13-4063515
     (State or Other Jurisdiction           (I.R.S. Employer Identification No.)
           of Incorporation)   


   135 EAST 57TH, NEW YORK, NEW YORK                       10022
(Address of Principal Executive Offices)                 (Zip Code)


                                 (212) 938-5000
              (Registrant's telephone number, including area code)

           Securities registered pursuant to Section 12(b) of the Act:


TITLE OF EACH CLASS                  NAME OF EACH EXCHANGE ON WHICH REGISTERED
-------------------                  -----------------------------------------
        None                                            None

           Securities registered pursuant to Section 12(g) of the Act:

                      CLASS A COMMON STOCK, $. 01 PAR VALUE
                                (Title of Class)

     Indicate by check mark whether the registrant: (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes [X] No [ ]

     Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K. [X]

     Indicate by check mark whether the registrant is an accelerated filer (as
defined in Rule 12b-2 of the Exchange Act). Yes [X] No [ ]

     The aggregate market value of voting common equity held by non-affiliates
of the registrant, based upon the closing price of the Class A common stock on
March 8, 2005 as reported on the Nasdaq National Market, was approximately $
249,707,490.

    Indicate the number of shares outstanding of each of the registrant's
classes of common stock, as of the latest practicable date. 

Class                                               Outstanding at March 8, 2005 
-----                                               ---------------------------- 
CLASS A COMMON STOCK, PAR VALUE $.01 PER SHARE      30,837,294 SHARES
CLASS B COMMON STOCK, PAR VALUE $.01 PER SHARE      22,139,270 SHARES

                      DOCUMENTS INCORPORATED BY REFERENCE.

                                      NONE.

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EXPLANATORY NOTE:

This 10-K/A is being filed to include the conformed signature of the auditor on
the consent contained in Exhibit 23 which signature was inadvertently omitted
from the Edgarized version accepted for filing earlier today.





                                   SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange
Act of 1934, the registrant has duly caused this Annual Report on Form 10-K/A
for the fiscal year ended December 31, 2004 to be signed on its behalf by the
undersigned, thereunto duly authorized, on the 16th day of March, 2005.


                                             eSPEED, INC.

                                             By: /s/ Stephen M. Merkel
                                                 -------------------------------  
                                             Name:  Stephen M. Merkel
                                             Title: Executive Vice President and
                                                    General Counsel