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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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<SEC-DOCUMENT>0000065100-08-000017.txt : 20080130
<SEC-HEADER>0000065100-08-000017.hdr.sgml : 20080130
<ACCEPTANCE-DATETIME>20080130164825
ACCESSION NUMBER:		0000065100-08-000017
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20080128
FILED AS OF DATE:		20080130
DATE AS OF CHANGE:		20080130

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MERRILL LYNCH & CO INC
		CENTRAL INDEX KEY:			0000065100
		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY BROKERS, DEALERS & FLOTATION COMPANIES [6211]
		IRS NUMBER:				132740599
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1228

	BUSINESS ADDRESS:	
		STREET 1:		4 WORLD FINANCIAL CTR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10080
		BUSINESS PHONE:		2124491000

	MAIL ADDRESS:	
		STREET 1:		4 WORLD FINANCIAL CTR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10080

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			FLEMING GREGORY J
		CENTRAL INDEX KEY:			0001258750

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-07182
		FILM NUMBER:		08561659

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		2126700420

	MAIL ADDRESS:	
		STREET 1:		MERRILL LYNCH
		STREET 2:		222 BROADWAY 17TH FLOOR
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10038
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2008-01-28</periodOfReport>

    <issuer>
        <issuerCik>0000065100</issuerCik>
        <issuerName>MERRILL LYNCH &amp; CO INC</issuerName>
        <issuerTradingSymbol>MER</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001258750</rptOwnerCik>
            <rptOwnerName>FLEMING GREGORY J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O MERRILL LYNCH &amp; CO., INC.</rptOwnerStreet1>
            <rptOwnerStreet2>4 WORLD FINANCIAL CENTER</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10080</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option - Right to Acquire</value>
                <footnoteId id="F1"/>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>55.593</value>
                <footnoteId id="F2"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2008-01-28</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1187200</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F3"/>
                <footnoteId id="F4"/>
            </exerciseDate>
            <expirationDate>
                <value>2018-01-28</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1187200</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1187200</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">The Management Development and Compensation Committee (the MDCC) of the Board of Directors of Merrill Lynch &amp; Co., Inc. (the Company) determined that the Company will not pay bonuses to executive officers for performance in 2007. On January 28, 2008, the MDCC approved performance-based retention grants to members of continuing executive management of the Company including Mr. Fleming. The grants were made to promote the continuity of the management team and create further alignment with shareholders. This transaction is exempt under Rule 16b-3.</footnote>
        <footnote id="F2">These stock options will be exercisable into shares of common stock.  The exercise price of all of the stock options is $55.593, the fair market value of the Company's common stock on January 28, 2008, the date of grant.</footnote>
        <footnote id="F3">To ensure significant retention value, the grants will not be exercisable and will not be subject to retirement treatment prior to January 28, 2010.  One-third of the stock options granted will become exercisable after January 28, 2010.  The remaining two-thirds of stock options granted will become exercisable after that date only if specified stock price targets are achieved at any time after the grant date as follows: (A) one-third of the total grant will become exercisable if the average closing price of the Company's common stock over any 15-day trading period reaches $80.00 per share and (B) the last third of the total grant will become exercisable if the average closing price of the Company's common stock over any 15-day trading period reaches $100.00 per share.  The exercise price of all of the stock options is $55.593, the fair market value of the Company's common stock on January 28, 2008, the date of grant. If the hurdles are not met, the grants will not become exercisable
.</footnote>
        <footnote id="F4">The full terms of these retention grants are described in a Current Report on Form 8-K to be filed by the Company contemporaneously with this filing.</footnote>
    </footnotes>

    <remarks>All reported positions have been rounded down to the nearest whole number.</remarks>

    <ownerSignature>
        <signatureName>Gregory J. Fleming (By Pia K. Thompson, as agent)</signatureName>
        <signatureDate>2008-01-30</signatureDate>
    </ownerSignature>
</ownershipDocument>
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</TEXT>
</DOCUMENT>
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