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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>0000950103-06-001685.txt : 20060703
<SEC-HEADER>0000950103-06-001685.hdr.sgml : 20060703
<ACCEPTANCE-DATETIME>20060703142151
ACCESSION NUMBER:		0000950103-06-001685
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060629
FILED AS OF DATE:		20060703
DATE AS OF CHANGE:		20060703

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:			Mezhvinsky Leonid
		CENTRAL INDEX KEY:			0001367203

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-50646
		FILM NUMBER:		06940456

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		650-3323-4100

	MAIL ADDRESS:	
		STREET 1:		C/O ULTRA CLEAN TECHNOLOGY
		STREET 2:		150 INDEPENDENCE DRIVE
		CITY:			MENLO PARK
		STATE:			CA
		ZIP:			94025
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>dp02999_4-mezhex.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-06-29</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

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

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001367203</rptOwnerCik>
            <rptOwnerName>Mezhvinsky Leonid</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O ULTRA CLEAN TECHNOLOGY</rptOwnerStreet1>
            <rptOwnerStreet2>150 INDEPENDENCE DRIVE</rptOwnerStreet2>
            <rptOwnerCity>MENLO PARK</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>94025</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-06-29</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1793860</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1793860</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>By trust</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Received as part of the consideration in exchange for 29,027,898 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;).  On the
 effective date of the Merger, the closing price of Ultra Clean's common stock was $7.81 per share.</footnote>
        <footnote id="F2">Revocable Trust of Leonid Mezhvinsky and Inna Mezhvinsky, dated April 26, 1988</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Leonid Mezhvinsky</signatureName>
        <signatureDate>2006-06-29</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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