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

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-05-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000005272</issuerCik>
        <issuerName>AMERICAN INTERNATIONAL GROUP INC</issuerName>
        <issuerTradingSymbol>AIG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001236599</rptOwnerCik>
            <rptOwnerName>GREENBERG MAURICE R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>399 PARK AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>17TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10022</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>2978128</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>16144278</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F3"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>356507</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Mr. Greenberg owns 24.082% of the total outstanding shares of common stock of C. V. Starr &amp; Co., Inc. (&quot;CV Starr&quot;). As of the close of business on May 2, 2007, CV Starr beneficially owned 12,366,676 shares of AIG common stock, excluding 16,144,278 shares of AIG common stock that are owned by C. V. Starr &amp; Co., Inc. Trust (the &quot;CV Starr Trust&quot;), for which CV Starr is a beneficiary and Mr. Greenberg is a trustee.</footnote>
        <footnote id="F2">As a result of the factors discussed in footnote 1 above, Mr. Greenberg may be deemed to have a pecuniary interest in the shares of AIG common stock beneficially owned by CV Starr. Mr. Greenberg believes that any pecuniary interest that he may be deemed to have in shares of AIG common stock beneficially owned by CV Starr would not exceed the percentage of his common stock ownership of CV Starr. Accordingly, Mr. Greenberg has reported only the effect on his proportionate interest in CV Starr of transactions by CV Starr in its common stock. Mr. Greenberg disclaims the beneficial ownership of, and any pecuniary interest in, the shares of AIG common stock owned by CV Starr.</footnote>
        <footnote id="F3">Mr. Greenberg may be deemed to be the beneficial owner of, and to have a pecuniary interest in, the shares of AIG common stock owned by the CV Starr Trust. Mr. Greenberg disclaims the beneficial ownership of, and any pecuniary interest in, the shares of AIG common stock owned by the CV Starr Trust.</footnote>
        <footnote id="F4">356,507 shares of common stock of AIG are owned by The Maurice R. and Corinne P. Greenberg Family Foundation, Inc. (the &quot;Greenberg Foundation&quot;), of which Mr. Greenberg is chairman of the board of directors. Mr. Greenberg may be deemed to be the beneficial owner of, and to have a pecuniary interest in, the shares of AIG common stock owned by the Greenberg Foundation. Mr. Greenberg disclaims the beneficial ownership of, and any pecuniary interest in, the shares of AIG common stock owned by the Greenberg Foundation.</footnote>
    </footnotes>

    <remarks>This is the second of two Forms filed by the reporting person on the same date. Mr. Greenberg may be deemed to beneficially own more than 10% of the common stock of American International Group, Inc. under Rule 16a-1(a)(1) under the Securities Exchange Act of 1934, as amended (the &quot;Exchange Act&quot;), as a result of him being deemed a member of a group under Section 13(d)(3) of the Exchange Act.</remarks>

    <ownerSignature>
        <signatureName>/s/ Howard I. Smith, Attorney-in-Fact; /s/ Leif B. King, Attorney-in-Fact for Maurice R. Greenberg</signatureName>
        <signatureDate>2007-05-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
