<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-08-16</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000914712</issuerCik>
        <issuerName>CMGI INC</issuerName>
        <issuerTradingSymbol>CMGI</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001106607</rptOwnerCik>
            <rptOwnerName>JP MORGAN PARTNERS BHCA LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>J.P. MORGAN PARTNERS</rptOwnerStreet1>
            <rptOwnerStreet2>1221 AVENUE OF THE AMERICAS 40TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10020</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001243235</rptOwnerCik>
            <rptOwnerName>JPMP MASTER FUND MANAGER L P</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>JP MORGAN PARTNERS LLC</rptOwnerStreet1>
            <rptOwnerStreet2>1221 AVENUE OF THE AMERICAS 40TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10020</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001243236</rptOwnerCik>
            <rptOwnerName>JPMP CAPITAL CORP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O J.P. MORGAN PARTNERS, LLC</rptOwnerStreet1>
            <rptOwnerStreet2>1221 AVENUE OF THE AMERICAS 40TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10020</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000019617</rptOwnerCik>
            <rptOwnerName>J P MORGAN CHASE &amp; CO</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>270 PARK AVE</rptOwnerStreet1>
            <rptOwnerStreet2>39TH FL</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, .01 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2004-08-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>329777</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.17</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4242895</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, .01 par value</value>
            </securityTitle>
            <transactionDate>
                <value>2004-08-19</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>200221</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.20</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4042674</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The Reporting Person is a party to a certain Stock Transfer Agreement dated as of March 23, 2004 and a certain
Stock Selling Agreement dated as of August 2, 2004 (collectively, the &quot;Selling Stockholder Agreements&quot;). As a
result thereof, the Reporting Person, Timothy M. Adams, Bain Capital Fund IV, L.P., Bain Capital Partners V,
L.P., BankAmerica Investment Corporation, BCIP Associates, BCIP Trust Associates, L.P., BCIP Trust Associates II,
BCIP Trust Associates II-B, BCM Capital Partners, L.P., Daniel F. Beck, Canpartners Investments IV, LLC, Rory J.
Cowan, Robert T. Dechant, Enterprise Associates, LLC, Vahram V. Erdekian, Sheila M. Flaherty, Fleet National
Bank, Trustee of the Alexander S. Moore Trust dated 6/5/96, Fleet National Bank, Trustee of the Abegail L. Moore
Trust dated 6/5/96, Harding Holdings, Inc., Information Partners, Deborah A. Keeman, Jeremiah Kelly, Linwood A.
Lacy, Terence M. Leahy, Stephen D.R. Moore, (footnote continued under &quot;Remarks&quot;)</footnote>
    </footnotes>

    <remarks>R. Scott Murray, OCM Mezzanine Fund, L.P., Nicholas G. Nomicos, Morton H. Rosenthal, Sankaty Credit Opportunities, L.P.,
Sankaty High Yield Partners II, L.P., Sankaty High Yield Partners III, L.P., W. Ken Southerland, Randy S. Stone, David A.
Tanner and The Murray 2003 Qualified Annuity Trust (the other parties to the Selling Stockholder Agreements) may be deemed
to constitute a &quot;group&quot; for purposes of Section 13(d)(3) of the Securities Exchange Act of 1932, as amended (the &quot;Act&quot;) with
respect to shares of the Issuer's Common Stock as of August 2, 2004 representing 13.3% of the Issuer's Common Stock
outstanding as of August 2, 2004. However, as of August 19, 2004, the group owned 9.96% of the Issuer's Outstanding Common
Stock. The Reporting Person disclaims beneficial ownership of any securities held by any other party to the Selling
Stockholder Agreements and the filing of this Form 3 shall not be deemed an admission that the Reporting Person or any other
 person or persons party to the Selling Shareholders Agreements constitute a &quot;group&quot; for purposes of Section 13(d)(3) of the
 Act or Rule 13d-5 thereunder.

See Exhibit 99.1</remarks>

    <ownerSignature>
        <signatureName>J.P. Morgan Partners (BHCA), L.P. By: JPMP Master Fund Manager, L.P., as general partner By: JPMP Capital Corp., as general partner /s/ Thomas Syzmoniak Vice President and Assistant Secretary</signatureName>
        <signatureDate>2004-08-20</signatureDate>
    </ownerSignature>
</ownershipDocument>

