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

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-12-03</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0000095585</issuerCik>
        <issuerName>PATHMARK STORES INC</issuerName>
        <issuerTradingSymbol>PTMK</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001330610</rptOwnerCik>
            <rptOwnerName>Yucaipa Corporate Initiatives Fund I, LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O THE YUCAIPA COMPANIES LLC</rptOwnerStreet1>
            <rptOwnerStreet2>9130 WEST SUNSET BLVD</rptOwnerStreet2>
            <rptOwnerCity>LOS ANGELES</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>90069</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-12-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>6884000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Series A Warrants</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>8.50</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2007-12-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F3"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>3462652</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F3"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2005-06-09</value>
            </exerciseDate>
            <expirationDate>
                <value>2008-06-09</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>3462652</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
        <derivativeTransaction>
            <securityTitle>
                <value>Series B Warrants</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>15</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2007-12-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F4"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>5178953.17</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F4"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F5"/>
            </exerciseDate>
            <expirationDate>
                <value>2015-06-09</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>5178953.17</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Pursuant to the Agreement and Plan of Merger (the &quot;Merger Agreement&quot;) by and among the issuer, The Great Atlantic &amp; Pacific Tea Company, Inc. (&quot;A&amp;P&quot;) and Sand Merger Corp., dated March 4, 2007, each share of common stock of the issuer was converted into the right to receive $9.00 in cash and 0.12963 shares of A&amp;P common stock.</footnote>
        <footnote id="F2">These securities are owned directly by the reporting person, but may be deemed to be beneficially owned indirectly by (i) Yucaipa Corporate Initiatives Fund I, LLC, as the general partner of the reporint person, and (ii) Ronald W. Burkle, as managing member of Yucaipa Corporate Initiatives Fund I, LLC. This report shall not be deemed an admission by Yucaipa Corporate Initiatives Fund I, LLC and/or Mr. Burkle that they are the beneficial owners of the securities for purposes of Section 16 or for any other purpose.</footnote>
        <footnote id="F3">Pursuant to the Merger Agreement, the Series A Warrants were exchanged for warrants to purchase 1,603,069.37 shares of A&amp;P common stock (subject to adjustment) at an exercise price of $18.36 per share.</footnote>
        <footnote id="F4">Pursuant to the Merger Agreement, the Series B Warrants were exchanged for warrants to purchase 2,397,648.39 shares of A&amp;P common stock (subject to adjustment) at an exercise price of $32.40 per share.</footnote>
        <footnote id="F5">The exercise period of the Series B Warrants commences on the earliest of (i) such time as none of Pathmark's 8 3/4% Senior Subordinated Notes due 2012 remains outstanding, (ii) such time as the price of Pathmark's common stock equals or exceeds the exercise price of the Series B Warrants, or (iii) upon any event constituting a &quot;Change of Control Event&quot; as defined in the indenture governing Pathmark's 8 3/4% Senior Subordinated Notes due 2012.</footnote>
    </footnotes>

    <remarks>The address of each of Yucaipa Corporate Initiatives Fund I, LLC and Mr. Burkle is 9130 West Sunset Boulevard, Los Angeles CA 90069.</remarks>

    <ownerSignature>
        <signatureName>/s/ Ronald W. Burkle</signatureName>
        <signatureDate>2007-12-03</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Robert P. Bermingham</signatureName>
        <signatureDate>2007-12-03</signatureDate>
    </ownerSignature>
</ownershipDocument>
