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

    <schemaVersion>X0306</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2018-12-05</periodOfReport>

    <notSubjectToSection16>true</notSubjectToSection16>

    <issuer>
        <issuerCik>0001344596</issuerCik>
        <issuerName>American Railcar Industries, Inc.</issuerName>
        <issuerTradingSymbol>ARII</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000921669</rptOwnerCik>
            <rptOwnerName>ICAHN CARL C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ICAHN ASSOCIATES HOLDING LLC</rptOwnerStreet1>
            <rptOwnerStreet2>767 FIFTH AVE., 47TH FLOOR</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10153</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001034563</rptOwnerCik>
            <rptOwnerName>ICAHN ENTERPRISES HOLDINGS L.P.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>445 HAMILTON AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1210</rptOwnerStreet2>
            <rptOwnerCity>WHITE PLAINS</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10601</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001490355</rptOwnerCik>
            <rptOwnerName>IEH ARI HOLDINGS LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>767 FIFTH AVE., 47TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10153</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001257324</rptOwnerCik>
            <rptOwnerName>ICAHN ENTERPRISES G.P. INC.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>445 HAMILTON AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1210</rptOwnerStreet2>
            <rptOwnerCity>WHITE PLAINS</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10601</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001080113</rptOwnerCik>
            <rptOwnerName>BECKTON CORP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>445 HAMILTON AVENUE</rptOwnerStreet1>
            <rptOwnerStreet2>SUITE 1210</rptOwnerStreet2>
            <rptOwnerCity>WHITE PLAINS</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10601</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001738751</rptOwnerCik>
            <rptOwnerName>AMERICAN ENTERTAINMENT PROPERTIES CORP.</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>767 FIFTH AVE., 47TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10153</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001738749</rptOwnerCik>
            <rptOwnerName>ICAHN BUILDING LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>767 FIFTH AVE., 47TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10153</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isTenPercentOwner>true</isTenPercentOwner>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock, $0.01 par value per share</value>
            </securityTitle>
            <transactionDate>
                <value>2018-12-05</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
                <footnoteId id="F1"/>
                <footnoteId id="F2"/>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>11871268</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>70</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">On December 5, 2018, the transactions contemplated by the Agreement and Plan of Merger (the &quot;Merger Agreement&quot;), dated as of October 22, 2018, by and between American Railcar Industries, Inc. (&quot;ARI&quot;) and STL Parent Corp. were completed.  Pursuant to the Merger Agreement, Merger Sub was merged with and into ARI, with ARI continuing as the surviving corporation after the Merger. Immediately prior to the consummation of the Merger, IEH ARI Holdings LLC, an entity that is indirectly controlled by Mr. Icahn (&quot;IEH&quot;), was the record holder of 11,871,268 shares of ARI's common stock, $0.01 par value per share (the &quot;Shares&quot;). Pursuant to the terms of the Merger Agreement, all of the outstanding Shares of ARI, including those held by IEH, were converted into the right to receive the merger consideration of $70.00 per Share.</footnote>
        <footnote id="F2">Accordingly, as a result of the Merger, the Reporting Persons no longer hold any Shares.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>IEH ARI HOLDINGS LLC

By: /s/ SungHwan Cho
Name: SungHwan Cho
Title: Chief Financial Officer</signatureName>
        <signatureDate>2018-12-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>AMERICAN ENTERTAINMENT PROPERTIES CORP.

By: /s/ SungHwan Cho
Name: SungHwan Cho
Title: Chief Financial Officer</signatureName>
        <signatureDate>2018-12-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ICAHN BUILDING LLC

By:  Icahn Enterprises Holdings L.P.,  its sole member
By:  Icahn Enterprises G.P. Inc., its general partner

By: /s/ SungHwan Cho
Name: SungHwan Cho
Title: Chief Financial Officer</signatureName>
        <signatureDate>2018-12-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ICAHN ENTERPRISES HOLDINGS L.P.

By:  Icahn Enterprises G.P. Inc., its general partner

By: /s/ SungHwan Cho
Name: SungHwan Cho
Title: Chief Financial Officer</signatureName>
        <signatureDate>2018-12-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>ICAHN ENTERPRISES G.P. INC.

By: /s/ SungHwan Cho
Name: SungHwan Cho
Title: Chief Financial Officer</signatureName>
        <signatureDate>2018-12-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>BECKTON CORP.

By:  /s/ Irene March
Name:  Irene March
Title:  Authorized Signatory</signatureName>
        <signatureDate>2018-12-06</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>CARL C. ICAHN

/s/ Carl C. Icahn</signatureName>
        <signatureDate>2018-12-06</signatureDate>
    </ownerSignature>
</ownershipDocument>
