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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 VpkUcxa1W8h5st2sCPxiLX8L5Zq1yeizK4Rm9EHW3XEiLDsDxiePDtdNrdWR9Xbj
 g9gIyaMml67Fh6wTuf46eg==

<SEC-DOCUMENT>0001005477-05-000920.txt : 20050310
<SEC-HEADER>0001005477-05-000920.hdr.sgml : 20050310
<ACCEPTANCE-DATETIME>20050310095009
ACCESSION NUMBER:		0001005477-05-000920
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20050228
FILED AS OF DATE:		20050310
DATE AS OF CHANGE:		20050310

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ESPEED INC
		CENTRAL INDEX KEY:			0001094831
		STANDARD INDUSTRIAL CLASSIFICATION:	SERVICES-BUSINESS SERVICES, NEC [7389]
		IRS NUMBER:				134063515
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		135 E. 57TH STREET
		STREET 2:		135 E. 57TH STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022
		BUSINESS PHONE:		2129385000

	MAIL ADDRESS:	
		STREET 1:		135 E. 57TH STREET
		STREET 2:		135 E. 57TH STREET
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10022

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			JUVONEN RONALD
		CENTRAL INDEX KEY:			0001137058

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-28191
		FILM NUMBER:		05670877

	MAIL ADDRESS:	
		STREET 1:		C/O DOWNTOWN ASSOCIATES
		STREET 2:		674 UNIONVILLE ROAD, SUITE 105
		CITY:			KENNETT SQUARE
		STATE:			PA
		ZIP:			19348
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>edgar123.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2005-02-28</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001094831</issuerCik>
        <issuerName>ESPEED INC</issuerName>
        <issuerTradingSymbol>ESPD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001137058</rptOwnerCik>
            <rptOwnerName>JUVONEN RONALD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O DOWNTOWN ASSOCIATES, L.L.C.</rptOwnerStreet1>
            <rptOwnerStreet2>674 UNIONVILLE ROAD, SUITE 105</rptOwnerStreet2>
            <rptOwnerCity>KENNETT SQUARE</rptOwnerCity>
            <rptOwnerState>PA</rptOwnerState>
            <rptOwnerZipCode>19348</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Class A Common Stock, par value $0.01</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>3226300</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F1"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By partnerships and limited liability company</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The securities reported herein are held by Downtown Associates I, L.P., Downtown Associates II, L.P., Downtown Associates III, L.P., Downtown Associates IV, L.P. and Downtown Associates V, L.P. (collectively referred to as the &quot;Downtown Funds&quot;).  The reporting person's indirect interest in the securities held by the Downtown Funds is limited to his pecuniary interest, if any, in the Downtown Funds.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Ronald J. Juvonen</signatureName>
        <signatureDate>2005-03-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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