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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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<SEC-DOCUMENT>0001209191-07-019356.txt : 20070322
<SEC-HEADER>0001209191-07-019356.hdr.sgml : 20070322
<ACCEPTANCE-DATETIME>20070322212418
ACCESSION NUMBER:		0001209191-07-019356
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20061129
FILED AS OF DATE:		20070322
DATE AS OF CHANGE:		20070322

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			ULTRA CLEAN HOLDINGS INC
		CENTRAL INDEX KEY:			0001275014
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				611430858
		FISCAL YEAR END:			1231

	MAIL ADDRESS:	
		STREET 1:		150 INDEPENDENCE DRIVE
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Joe & Jenny Chen as Trustees of the Joe Chen & Jenny Chen Revocable Trust Dated 2002
		CENTRAL INDEX KEY:			0001367307

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-50646
		FILM NUMBER:		07713278

	BUSINESS ADDRESS:	
		STREET 1:		260 LOYOLA DRIVE
		CITY:			MILLBRAE
		STATE:			CA
		ZIP:			94030
		BUSINESS PHONE:		650-303-7029

	MAIL ADDRESS:	
		STREET 1:		260 LOYOLA DRIVE
		CITY:			MILLBRAE
		STATE:			CA
		ZIP:			94030
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>bpa27877_bpa5jjc.xml
<DESCRIPTION>MAIN DOCUMENT DESCRIPTION
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-11-29</periodOfReport>

    <issuer>
        <issuerCik>0001275014</issuerCik>
        <issuerName>ULTRA CLEAN HOLDINGS INC</issuerName>
        <issuerTradingSymbol>UCTT</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001367307</rptOwnerCik>
            <rptOwnerName>Joe &amp; Jenny Chen as Trustees of the Joe Chen &amp; Jenny Chen Revocable Trust Dated 2002</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>ULTRA CLEAN HOLDINGS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>150 INDEPENDENCE DR.</rptOwnerStreet2>
            <rptOwnerCity>MENLO PARK</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94025</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-11-29</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>J</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>23663</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>497779</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes>
        <footnote id="F1">Received as part of the consideration in exchange for 7,672,064 shares of Sieger Engineering, Inc. common stock in connection with merger of Sieger Engineering, Inc. and a subsidiary of Ultra Clean Holdings, Inc. (the &quot;Merger&quot;).</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Joe Chen</signatureName>
        <signatureDate>2007-03-15</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Jenny Chen</signatureName>
        <signatureDate>2007-03-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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