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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>0000315066-05-001497.txt : 20050411
<SEC-HEADER>0000315066-05-001497.hdr.sgml : 20050411
<ACCEPTANCE-DATETIME>20050411155059
ACCESSION NUMBER:		0000315066-05-001497
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20040812
FILED AS OF DATE:		20050411
DATE AS OF CHANGE:		20050411

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ARCHIPELAGO HOLDINGS INC
		CENTRAL INDEX KEY:			0001107389
		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY & COMMODITY BROKERS, DEALERS, EXCHANGES & SERVICES [6200]
		IRS NUMBER:				364298373
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		100 SOUTH WACKER DRIVE
		STREET 2:		SUITE 1800
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606
		BUSINESS PHONE:		312-960-1696

	MAIL ADDRESS:	
		STREET 1:		100 SOUTH WACKER DRIVE
		STREET 2:		SUITE 1800
		CITY:			CHICAGO
		STATE:			IL
		ZIP:			60606

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	ARCHIPELAGO HOLDINGS L L C
		DATE OF NAME CHANGE:	20000218

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FMR CORP
		CENTRAL INDEX KEY:			0000315066
		STATE OF INCORPORATION:			MA
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-32274
		FILM NUMBER:		05744066

	BUSINESS ADDRESS:	
		STREET 1:		82 DEVONSHIRE ST
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109
		BUSINESS PHONE:		6175706339

	MAIL ADDRESS:	
		STREET 1:		82 DEVONSHIRE STREET
		CITY:			BOSTON
		STATE:			MA
		ZIP:			02109
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2004-08-12</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001107389</issuerCik>
        <issuerName>ARCHIPELAGO HOLDINGS INC</issuerName>
        <issuerTradingSymbol>AX</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000315066</rptOwnerCik>
            <rptOwnerName>FMR CORP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>82 DEVONSHIRE STREET</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BOSTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02109</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>2728340</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By wholly owned subsidiaries.</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Through wholly owned subsidiary 2,728,340 shares.  FMR Corp. also has indirect voting and investment power with respect to 3,163,750 shares held through a wholly owned registered investment adviser, but disclaims any pecuniary interest with respect to those shares.</footnote>
    </footnotes>

    <remarks>FMR Corp. is a parent holding company.  Through a wholly owned subsidiary, FMR Corp. is the beneficial owner of 2,728,340 shares or 5.89% of the outstanding common stock of Archipelago Holdings Incorporated.  Fidelity Management &amp; Research Company, another wholly owned subsidiary of FMR Corp. and an investment adviser registered under the Investment Advisers Act of 1940, is the beneficial owner of 3,163,750 or 6.83% of Archipelago Holdings Incorporated as a result of acting as investment adviser to various investment companies registered under the Investment Company Act of 1940, and to various third party accounts.  FMR Corp. disclaims any pecuniary interest in the 3,163,750 shares.  Members of the Edward C Johnson 3rd family are the predominant owners of class B shares of common stock of FMR Corp., representing approximately 49% of the voting power of FMR Corp.  Mr. Johnson owns 12.0% and Abigail Johnson owns 24.5% of the aggregate outstanding voting stock of FMR Corp.  Mr. Johnson 3rd is t
he Chairman of FMR Corp. and Abigail P. Johnson is a Director of FMR Corp.  The Johnson family group and all other Class B shareholders have entered into a shareholders' voting agreement under which all Class B shares will be voted in accordance with the majority vote of Class B shares.  Accordingly, through their ownership of voting common stock and the execution of the shareholders' voting agreement, members of the Johnson family may be deemed, under the Investment Company Act of 1940, to form a controlling group with respect to FMR Corp.</remarks>

    <ownerSignature>
        <signatureName>Nicholas E. Steck V.P. &amp; Compliance Officer</signatureName>
        <signatureDate>2005-04-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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