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

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-08-11</periodOfReport>

    <notSubjectToSection16>0</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>2004-08-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>116388</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.33</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5883278</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>2004-08-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>64161</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.26</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5819117</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>2004-08-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>80483</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.18</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5738634</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>2004-08-11</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>141333</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.17</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>4961336</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, (footnote continued under &quot;Remarks&quot;)</footnote>
    </footnotes>

    <remarks>Stephen D.R. Moore, 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. 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>/s/ Richard Jansen J.P. Morgan Partners (BHCA), L.P. By: JPMP Master Fund Manager, L.P., as general partner By: JPMP Capital Corp., as general partner</signatureName>
        <signatureDate>2004-08-13</signatureDate>
    </ownerSignature>
</ownershipDocument>

