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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 eawmk6XT0RS0Lw20NxiEMQ==

<SEC-DOCUMENT>0001374535-10-000020.txt : 20100514
<SEC-HEADER>0001374535-10-000020.hdr.sgml : 20100514
<ACCEPTANCE-DATETIME>20100514130108
ACCESSION NUMBER:		0001374535-10-000020
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100512
FILED AS OF DATE:		20100514
DATE AS OF CHANGE:		20100514

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Christenson Carl R
		CENTRAL INDEX KEY:			0001383274

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-33209
		FILM NUMBER:		10831876

	MAIL ADDRESS:	
		STREET 1:		C/O ALTRA INDUSTRIAL MOTION INC.
		STREET 2:		300 GRANITE STREET
		CITY:			BRAINTREE
		STATE:			MA
		ZIP:			02184

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			Altra Holdings, Inc.
		CENTRAL INDEX KEY:			0001374535
		STANDARD INDUSTRIAL CLASSIFICATION:	GENERAL INDUSTRIAL MACHINERY & EQUIPMENT, NEC [3569]
		IRS NUMBER:				611478870
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		300 GRANITE STREET
		STREET 2:		SUITE 201
		CITY:			BRAINTREE
		STATE:			MA
		ZIP:			02184
		BUSINESS PHONE:		781-917-0600

	MAIL ADDRESS:	
		STREET 1:		300 GRANITE STREET
		STREET 2:		SUITE 201
		CITY:			BRAINTREE
		STATE:			MA
		ZIP:			02184
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>christensonsale51310_ex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-05-12</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001374535</issuerCik>
        <issuerName>Altra Holdings, Inc.</issuerName>
        <issuerTradingSymbol>AIMC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001383274</rptOwnerCik>
            <rptOwnerName>Christenson Carl R</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ALTRA INDUSTRIAL MOTION INC.</rptOwnerStreet1>
            <rptOwnerStreet2>300 GRANITE STREET</rptOwnerStreet2>
            <rptOwnerCity>BRAINTREE</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>02184</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Cheif Executive Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>common stock, par value $0.01</value>
            </securityTitle>
            <transactionDate>
                <value>2010-05-12</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>10000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>15.01</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>583530</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Shares sold pursuant to 10b-5 plan</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>Todd Patriacca attorney in fact</signatureName>
        <signatureDate>2010-05-14</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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