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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><FONT STYLE="font-weight: normal">As filed
with the Securities and Exchange Commission on December <FONT STYLE="background-color: White">18</FONT>, 2019</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right"><FONT STYLE="font-weight: normal">Registration
No. 333-</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: right">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>UNITED STATES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>SECURITIES AND EXCHANGE COMMISSION</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Washington, D.C. 20549</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>FORM S-8</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>REGISTRATION STATEMENT</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><I>Under the Securities Act of 1933</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>&nbsp;</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>ULTRA CLEAN HOLDINGS, INC.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Exact name of registrant as specified in<BR>
its charter)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

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    <TD STYLE="width: 33%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Delaware</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(State or other jurisdiction</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">of incorporation or organization)</P></TD>
    <TD STYLE="width: 34%; font-size: 10pt; text-align: center">&nbsp;</TD>
    <TD STYLE="width: 33%">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>61-1430858</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(IRS Employer Identification No.)</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt; text-align: center">&nbsp;</TD>
    <TD>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>26462 CORPORATE AVENUE</B></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>HAYWARD, CA 94545</B>&nbsp;</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Address of principal executive
offices) (Zip Code)</P></TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt; text-align: center">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD STYLE="font-size: 10pt">&nbsp;</TD></TR>
</TABLE>
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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>ULTRA CLEAN HOLDINGS, INC. AMENDED AND
RESTATED STOCK INCENTIVE PLAN</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Full title of the Plan)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>James P. Scholhamer<BR>
Chief Executive Officer<BR>
Ultra Clean Holdings, Inc.</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>26462 Corporate Avenue</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>Hayward, CA 94545</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>(510) 576-4600</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Name, address including zip code, and telephone
number,<BR>
including area code, of agent for service)</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><I>Copies to:</I></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Alan F. Denenberg, Esq.<BR>
Davis Polk &amp; Wardwell LLP<BR>
1600 El Camino Real</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Menlo Park, California 94025<BR>
(650) 752-2000</P>

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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0in">Indicate by check mark whether the registrant
is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth
company. See the definitions of &ldquo;large accelerated filer,&rdquo; &ldquo;accelerated filer&rdquo; &ldquo;smaller reporting
company,&rdquo; and emerging growth company in Rule 12b-2 of the Exchange Act.</P>

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    <TD STYLE="width: 66%; font-size: 10pt; text-indent: 0in; padding-left: 0.5in"><FONT STYLE="font-size: 10pt">Large accelerated filer&nbsp;&nbsp;<FONT STYLE="font-family: Times New Roman, Times, Serif">&#9744;</FONT></FONT></TD>
    <TD STYLE="width: 34%; font-size: 10pt; text-indent: 0in"><FONT STYLE="font-size: 10pt">Accelerated filer&nbsp;&nbsp;<FONT STYLE="font-family: Times New Roman, Times, Serif">&#9746;</FONT></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt; text-indent: 0in; padding-left: 0.5in"><FONT STYLE="font-size: 10pt">Non-accelerated filer&nbsp;&nbsp;<FONT STYLE="font-family: Times New Roman, Times, Serif">&#9744;</FONT></FONT></TD>
    <TD STYLE="font-size: 10pt; text-indent: 0in"><FONT STYLE="font-size: 10pt">Smaller reporting company&nbsp;&nbsp;<FONT STYLE="font-family: Times New Roman, Times, Serif">&#9744;</FONT></FONT></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt; text-indent: 0in; padding-left: 0.5in"><FONT STYLE="font-size: 10pt">Emerging growth company&nbsp;&nbsp;<FONT STYLE="font-family: Times New Roman, Times, Serif">&#9744;</FONT></FONT></TD>
    <TD STYLE="font-size: 10pt; text-indent: 0in">&nbsp;</TD></TR>
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    <TD STYLE="width: 96%; font-size: 10pt; text-indent: 0in"><FONT STYLE="font-size: 10pt">If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.</FONT></TD>
    <TD STYLE="width: 4%; font-size: 10pt; text-align: center"><FONT STYLE="font-family: Times New Roman, Times, Serif; font-size: 10pt">&#9744;</FONT></TD></TR>
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<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">CALCULATION OF REGISTRATION FEE</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 37%; padding-right: 6pt">
        <P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid">Title
of Securities to be Registered</P></TD>
    <TD STYLE="width: 16%; padding-right: 6pt; text-align: center">
        <P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; border-bottom: Black 0.5pt solid; margin-bottom: 0pt; text-align: center">Amount
to be Registered (1)</P></TD>
    <TD STYLE="width: 14%; padding-right: 6pt; text-align: center">
        <P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; border-bottom: Black 0.5pt solid; margin-bottom: 0pt; text-align: center">Proposed
Maximum Offering Price per Share (2)</P></TD>
    <TD STYLE="width: 17%; padding-right: 6pt; text-align: center">
        <P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; border-bottom: Black 0.5pt solid; margin-bottom: 0pt; text-align: center">Proposed
Maximum Aggregate Offering Price (2)</P></TD>
    <TD STYLE="width: 16%; padding-right: 6pt; text-align: center">
        <P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin-top: 0pt; border-bottom: Black 0.5pt solid; margin-bottom: 0pt; text-align: center">Amount
of Registration Fee</P></TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font-size: 10pt; padding-right: 6pt">Common Stock, $0.001 par value</TD>
    <TD STYLE="font-size: 10pt; text-align: center; padding-right: 6pt">2,300,000 (3)</TD>
    <TD STYLE="font-size: 10pt; text-align: center; padding-right: 6pt">$<FONT STYLE="background-color: White">22.80</FONT></TD>
    <TD STYLE="font-size: 10pt; text-align: center; padding-right: 6pt">$<FONT STYLE="background-color: White">52,440,000</FONT></TD>
    <TD STYLE="font-size: 10pt; text-align: center; padding-right: 6pt">$<FONT STYLE="background-color: White">6,807</FONT></TD></TR>
</TABLE>
<P STYLE="margin-top: 0; margin-bottom: 0">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in">(1)</TD><TD>Pursuant to Rule 416(a) promulgated under the Securities Act of 1933, as amended (the &ldquo;Securities Act&rdquo;), this Registration
Statement shall also cover any additional shares of Registrant&rsquo;s common stock that become issuable under the plan set forth
herein by reason of any stock dividend, stock split, recapitalization, or other similar transaction effected that results in an
increase to the number of outstanding shares of Registrant&rsquo;s common stock, as applicable.</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<TABLE CELLPADDING="0" CELLSPACING="0" WIDTH="100%" STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt"><TR STYLE="vertical-align: top">
<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in">(2)</TD><TD>Calculated solely for purposes of calculating the amount of the registration fee under Rule 457(h) of the Securities Act, on
the basis of the average of the high and low selling prices per share of the Registrant&rsquo;s Common Stock on December <FONT STYLE="background-color: White">11</FONT>,
2019 as reported by the Nasdaq Global Market, rounded to the nearest cent.</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 0.25in">(3)</TD><TD>Represents an increase in the number of shares available for issuance under the Registrant&rsquo;s Amended and Restated Stock
Incentive Plan based on the amendment and restatement of the Registrant&rsquo;s Amended and Restated Stock Incentive Plan effective
as of May 24, 2019.</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>


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<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>REGISTRATION OF ADDITIONAL SHARES</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><B>PURSUANT TO GENERAL INSTRUCTION E</B></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">Pursuant to General Instruction E on Form
S-8, this Registration Statement is being filed for the purpose of registering an additional 2,300,000 shares of common stock of
Ultra Clean Holdings, Inc. (the &ldquo;Registrant&rdquo;) issuable pursuant to the Registrant&rsquo;s Amended and Restated Stock
Incentive Plan. These additional shares of common stock are securities of the same class and relate to the same employee benefit
plan (as amended from time to time) as other securities for which a registration statement on Form S-8 has been filed with the
Securities and Exchange Commission on July 25, 2017 (File No. 333-219447), the contents of which are hereby incorporated by reference.
These additional shares of common stock have become reserved for issuance as a result of the amendment and restatement of the Registrant&rsquo;s
Amended and Restated Stock Incentive Plan effective as of May 24, 2019.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">PART II<BR>
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

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<TD STYLE="width: 0"></TD><TD STYLE="width: 1in">ITEM 8.</TD><TD>EXHIBITS</TD></TR></TABLE>

<P STYLE="margin-top: 0pt; margin-bottom: 0pt; font: 10pt Times New Roman, Times, Serif">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 8%; padding-right: 6pt">
        <P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid">Exhibit
Number</P></TD>
    <TD STYLE="width: 92%; padding-right: 6pt">
        <P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid">Description</P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 6pt">5.1</TD>
    <TD STYLE="padding-right: 6pt"><A HREF="dp117698_ex0501.htm" STYLE="color: Blue; text-decoration: underline">Opinion of Davis Polk &amp; Wardwell LLP</A></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 6pt">23.1</TD>
    <TD STYLE="padding-right: 6pt"><A HREF="dp117698_ex2301.htm">Consent of Moss Adams LLP, independent registered public accounting firm</A></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 6pt">23.2</TD>
    <TD STYLE="padding-right: 6pt"><A HREF="dp117698_ex0501.htm" STYLE="color: Blue; text-decoration: underline">Consent of Davis Polk &amp; Wardwell LLP (contained in Exhibit 5.1 hereto)</A></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 6pt">24.1</TD>
    <TD STYLE="padding-right: 6pt"><A HREF="#poa" STYLE="color: Blue; text-decoration: underline">Power of Attorney (included on the signature page of this registration statement)</A></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 6pt">99.1</TD>
    <TD STYLE="padding-right: 6pt"><A HREF="http://www.sec.gov/Archives/edgar/data/1275014/000095010319006784/dp107197_ex1001.htm" STYLE="color: Blue; text-decoration: underline">Amended and Restated Stock Incentive Plan (incorporated by reference to Exhibit 10.1 to the Registrant&rsquo;s Form 8-K filed on May 24, 2019)</A></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
</TABLE>

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<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">SIGNATURES</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">Pursuant to the requirements of the Securities
Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements
for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Hayward, State of California, on the <FONT STYLE="background-color: White">18th</FONT> day of
December, 2019.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="width: 100%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD COLSPAN="3"><B>Ultra Clean Holdings, Inc.</B></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 50%">&nbsp;</TD>
    <TD STYLE="width: 4%">&nbsp;</TD>
    <TD STYLE="width: 5%">&nbsp;</TD>
    <TD STYLE="width: 41%">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>By:</TD>
    <TD COLSPAN="2" STYLE="border-bottom: Black 1pt solid">/s/ James P. Scholhamer</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>Name:</TD>
    <TD>James P. Scholhamer</TD></TR>
<TR STYLE="vertical-align: top">
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>Title:</TD>
    <TD>Chief Executive Officer</TD></TR>
</TABLE>
<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"><A NAME="poa"></A>POWER OF ATTORNEY</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in"><B>KNOW ALL PERSONS BY THESE PRESENTS</B>,
that each person whose signature appears below constitutes and appoints James P. Scholhamer and Sheri Savage, and each of them,
as his/her true and lawful attorneys-in-fact and agents, with full power of substitution and re-substitution, for him/her in any
and all capacities, to sign any and all amendments to this Registration Statement and to file the same, with all exhibits thereto
and other documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying and confirming that
each of said attorneys-in-fact and agents, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">Pursuant to the requirements of the Securities
Act of 1933, as amended, this Report has been signed below by the following persons on behalf of the Registrant and in the capacities
and on the dates indicated.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-indent: 0.25in">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 28%; padding-right: 0pt; text-indent: 0pt">
        <P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid">Name</P></TD>
    <TD STYLE="width: 52%; padding-right: 6pt; padding-left: 6pt">
        <P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid">Title</P></TD>
    <TD STYLE="width: 20%; padding-right: 6pt">
        <P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; border-bottom: Black 0.5pt solid">Date</P></TD></TR>

<TR STYLE="vertical-align: top">
    <TD STYLE="padding-right: 0pt; text-indent: 0pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="width: 27%; padding-right: 0pt; text-indent: 0pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0in; border-bottom: Black 0.5pt solid">/s/
        Clarence L. Granger</P>
        </TD>
    <TD STYLE="width: 52%; padding-right: 6pt; padding-left: 6pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Chairman</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center"></P></TD>
    <TD STYLE="width: 21%; text-align: right; padding-right: 6pt">December <FONT STYLE="background-color: White">18</FONT>, 2019</TD></TR>

<TR STYLE="vertical-align: top">
    <TD STYLE="width: 28%; text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt"><FONT STYLE="font-size: 10pt; font-weight: normal">Clarence L. Granger</FONT></TD>
    <TD STYLE="width: 52%; text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="width: 20%; padding-right: 6pt">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; text-align: right; padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 0pt; text-indent: 0pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0in; border-bottom: Black 0.5pt solid">/s/
        James P. Scholhamer</P>
        </TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">Chief Executive Officer and Director <BR>
(Principal Executive Officer)</TD>
    <TD STYLE="text-align: right; padding-right: 6pt">December <FONT STYLE="background-color: White">18</FONT>, 2019</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt"><FONT STYLE="font-size: 10pt; font-weight: normal">James P. Scholhamer</FONT></TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; text-align: right; padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0pt; padding-right: 0pt; border-bottom: Black 1pt solid">/s/ Sheri Savage</TD>
    <TD STYLE="padding-right: 6pt; padding-left: 6pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">Chief Financial Officer</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center">(Principal Financial Officer)</P></TD>
    <TD STYLE="text-align: right; padding-right: 6pt">December <FONT STYLE="background-color: White">18</FONT>, 2019</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt"><FONT STYLE="font-size: 10pt; font-weight: normal">Sheri Savage</FONT></TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; text-align: right; padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 0pt; text-indent: 0pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0in; border-bottom: Black 0.5pt solid">/s/
        Leonid Mezhvinsky</P>
        </TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">Director</TD>
    <TD STYLE="text-align: right; padding-right: 6pt">December <FONT STYLE="background-color: White">18</FONT>, 2019</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt"><FONT STYLE="font-size: 10pt; font-weight: normal">Leonid Mezhvinsky</FONT></TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; text-align: right; padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 0pt; text-indent: 0pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0in; border-bottom: Black 0.5pt solid">/s/
        Emily M. Liggett</P>
        </TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">Director</TD>
    <TD STYLE="text-align: right; padding-right: 6pt">December <FONT STYLE="background-color: White">18</FONT>, 2019</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt"><FONT STYLE="font-size: 10pt; font-weight: normal">Emily M. Liggett</FONT></TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; text-align: right; padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 0pt; text-indent: 0pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0in; border-bottom: Black 0.5pt solid">/s/
        Thomas T. Edman</P>
        </TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">Director</TD>
    <TD STYLE="text-align: right; padding-right: 6pt">December <FONT STYLE="background-color: White">18</FONT>, 2019</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt"><FONT STYLE="font-size: 10pt; font-weight: normal">Thomas T. Edman</FONT></TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; text-align: right; padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 0pt; text-indent: 0pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0in; border-bottom: Black 0.5pt solid">/s/
        Barbara V. Scherer</P>
        </TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">Director</TD>
    <TD STYLE="text-align: right; padding-right: 6pt">December <FONT STYLE="background-color: White">18</FONT>, 2019</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt"><FONT STYLE="font-size: 10pt; font-weight: normal">Barbara V. Scherer</FONT></TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt">&nbsp;</TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 0pt; text-indent: 0pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0in; border-bottom: Black 0.5pt solid">/s/
        David T. ibnAle</P>
        </TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">Director</TD>
    <TD STYLE="text-align: right; padding-right: 6pt">December <FONT STYLE="background-color: White">18</FONT>, 2019</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt"><FONT STYLE="font-size: 10pt; font-weight: normal">David ibnAle</FONT></TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
<TR>
    <TD STYLE="vertical-align: top; text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt">&nbsp;</TD>
    <TD STYLE="vertical-align: top; text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="vertical-align: bottom; text-align: right; padding-right: 6pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: bottom">
    <TD STYLE="padding-right: 0pt; text-indent: 0pt">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0pt 0; text-align: center; text-indent: 0in; border-bottom: Black 0.5pt solid">/s/
        Ernest E. Maddock</P>
        </TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">Director</TD>
    <TD STYLE="text-align: right; padding-right: 6pt">December <FONT STYLE="background-color: White">18</FONT>, 2019</TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="text-align: center; font-weight: bold; padding-right: 0pt; text-indent: 0pt"><FONT STYLE="font-size: 10pt; font-weight: normal">Ernest E. Maddock</FONT></TD>
    <TD STYLE="text-align: center; padding-right: 6pt; padding-left: 6pt">&nbsp;</TD>
    <TD STYLE="padding-right: 6pt">&nbsp;</TD></TR>
</TABLE>

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[{"type": "S-8", "sequence": "1", "filename": "dp117698_s8.htm", "description": "FORM S-8", "secsgml_size_bytes": 36586}]
{"company-data": {"conformed-name": "Ultra Clean Holdings, Inc.", "cik": "0001275014", "assigned-sic": "3674", "irs-number": "611430858", "state-of-incorporation": "DE", "fiscal-year-end": "1227"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-235574", "film-number": "191293561"}, "business-address": {"street1": "26462 CORPORATE AVENUE", "city": "HAYWARD", "state": "CA", "zip": "94545", "phone": "(510) 576-4400"}, "mail-address": {"street1": "26462 CORPORATE AVENUE", "city": "HAYWARD", "state": "CA", "zip": "94545"}, "former-company": {"former-conformed-name": "ULTRA CLEAN HOLDINGS INC", "date-changed": "20031231"}}
As filed
with the Securities and Exchange Commission on December
18
, 2019
Registration
No. 333-
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
Under the Securities Act of 1933
ULTRA CLEAN HOLDINGS, INC.
(Exact name of registrant as specified in
its charter)
Delaware
(State or other jurisdiction
of incorporation or organization)
61-1430858
(IRS Employer Identification No.)
26462 CORPORATE AVENUE
HAYWARD, CA 94545
(Address of principal executive
offices) (Zip Code)
ULTRA CLEAN HOLDINGS, INC. AMENDED AND
RESTATED STOCK INCENTIVE PLAN
(Full title of the Plan)
James P. Scholhamer
Chief Executive Officer
Ultra Clean Holdings, Inc.
26462 Corporate Avenue
Hayward, CA 94545
(510) 576-4600
(Name, address including zip code, and telephone
number,
including area code, of agent for service)
Copies to:
Alan F. Denenberg, Esq.
Davis Polk & Wardwell LLP
1600 El Camino Real
Menlo Park, California 94025
(650) 752-2000
Indicate by check mark whether the registrant
is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth
company. See the definitions of "large accelerated filer," "accelerated filer" "smaller reporting
company," and emerging growth company in Rule 12b-2 of the Exchange Act.
Large accelerated filer
☐
Accelerated filer
☒
Non-accelerated filer
☐
Smaller reporting company
☐
Emerging growth company
☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.
☐
CALCULATION OF REGISTRATION FEE
Title
of Securities to be Registered
Amount
to be Registered (1)
Proposed
Maximum Offering Price per Share (2)
Proposed
Maximum Aggregate Offering Price (2)
Amount
of Registration Fee
Common Stock, $0.001 par value
2,300,000 (3)
$
22.80
$
52,440,000
$
6,807
(1)
Pursuant to Rule 416(a) promulgated under the Securities Act of 1933, as amended (the "Securities Act"), this Registration
Statement shall also cover any additional shares of Registrant's common stock that become issuable under the plan set forth
herein by reason of any stock dividend, stock split, recapitalization, or other similar transaction effected that results in an
increase to the number of outstanding shares of Registrant's common stock, as applicable.
(2)
Calculated solely for purposes of calculating the amount of the registration fee under Rule 457(h) of the Securities Act, on
the basis of the average of the high and low selling prices per share of the Registrant's Common Stock on December
11
,
2019 as reported by the Nasdaq Global Market, rounded to the nearest cent.
(3)
Represents an increase in the number of shares available for issuance under the Registrant's Amended and Restated Stock
Incentive Plan based on the amendment and restatement of the Registrant's Amended and Restated Stock Incentive Plan effective
as of May 24, 2019.
REGISTRATION OF ADDITIONAL SHARES
PURSUANT TO GENERAL INSTRUCTION E
Pursuant to General Instruction E on Form
S-8, this Registration Statement is being filed for the purpose of registering an additional 2,300,000 shares of common stock of
Ultra Clean Holdings, Inc. (the "Registrant") issuable pursuant to the Registrant's Amended and Restated Stock
Incentive Plan. These additional shares of common stock are securities of the same class and relate to the same employee benefit
plan (as amended from time to time) as other securities for which a registration statement on Form S-8 has been filed with the
Securities and Exchange Commission on July 25, 2017 (File No. 333-219447), the contents of which are hereby incorporated by reference.
These additional shares of common stock have become reserved for issuance as a result of the amendment and restatement of the Registrant's
Amended and Restated Stock Incentive Plan effective as of May 24, 2019.
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
ITEM 8.
EXHIBITS
Exhibit
Number
Description
5.1
Opinion of Davis Polk & Wardwell LLP
23.1
Consent of Moss Adams LLP, independent registered public accounting firm
23.2
Consent of Davis Polk & Wardwell LLP (contained in Exhibit 5.1 hereto)
24.1
Power of Attorney (included on the signature page of this registration statement)
99.1
Amended and Restated Stock Incentive Plan (incorporated by reference to Exhibit 10.1 to the Registrant's Form 8-K filed on May 24, 2019)
SIGNATURES
Pursuant to the requirements of the Securities
Act of 1933, as amended, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements
for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the City of Hayward, State of California, on the
18th
day of
December, 2019.
Ultra Clean Holdings, Inc.
By:
/s/ James P. Scholhamer
Name:
James P. Scholhamer
Title:
Chief Executive Officer
POWER OF ATTORNEY
KNOW ALL PERSONS BY THESE PRESENTS
,
that each person whose signature appears below constitutes and appoints James P. Scholhamer and Sheri Savage, and each of them,
as his/her true and lawful attorneys-in-fact and agents, with full power of substitution and re-substitution, for him/her in any
and all capacities, to sign any and all amendments to this Registration Statement and to file the same, with all exhibits thereto
and other documents in connection therewith, with the Securities and Exchange Commission, hereby ratifying and confirming that
each of said attorneys-in-fact and agents, or his substitute or substitutes, may lawfully do or cause to be done by virtue hereof.
Pursuant to the requirements of the Securities
Act of 1933, as amended, this Report has been signed below by the following persons on behalf of the Registrant and in the capacities
and on the dates indicated.
Name
Title
Date
/s/
        Clarence L. Granger
Chairman
December
18
, 2019
Clarence L. Granger
/s/
        James P. Scholhamer
Chief Executive Officer and Director
(Principal Executive Officer)
December
18
, 2019
James P. Scholhamer
/s/ Sheri Savage
Chief Financial Officer
(Principal Financial Officer)
December
18
, 2019
Sheri Savage
/s/
        Leonid Mezhvinsky
Director
December
18
, 2019
Leonid Mezhvinsky
/s/
        Emily M. Liggett
Director
December
18
, 2019
Emily M. Liggett
/s/
        Thomas T. Edman
Director
December
18
, 2019
Thomas T. Edman
/s/
        Barbara V. Scherer
Director
December
18
, 2019
Barbara V. Scherer
/s/
        David T. ibnAle
Director
December
18
, 2019
David ibnAle
/s/
        Ernest E. Maddock
Director
December
18
, 2019
Ernest E. Maddock