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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>
<DIV style="font-family: 'Times New Roman',Times,serif">


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">As filed with the Securities and Exchange Commission on April&nbsp;09, 2007
</DIV>


<DIV align="right" style="font-size: 10pt; margin-top: 12pt">Registration No.&nbsp;333-
</DIV>


<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 1pt solid black; font-size: 1pt">&nbsp;</DIV>




<DIV align="center" style="font-size: 14pt; margin-top: 12pt"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION</B>
</DIV>

<DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549</B>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>

<DIV align="center" style="font-size: 18pt; margin-top: 12pt"><B>FORM
S-8</b></DIV>
<DIV align="center" style="font-size: 14pt; margin-top: 0pt"><b>REGISTRATION STATEMENT<BR>
UNDER<BR>
THE SECURITIES ACT OF 1933</B>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>ULTRA CLEAN HOLDINGS, INC.</B>
</DIV>

<DIV align="center" style="font-size: 10pt">(Exact name of registrant as specified in its charter)</DIV>


<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
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<TR valign="bottom">
    <TD width="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
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<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><B>Delaware</B>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>61-1430858</B></TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(State or other jurisdiction <BR>
of incorporation or organization)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(IRS Employer Identification No.)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>150 INDEPENDENCE DRIVE<BR>
MENLO PARK, CA 94025</B><BR>
(Address of principal executive offices) (Zip Code)
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>ULTRA CLEAN HOLDINGS, INC. AMENDED AND RESTATED STOCK INCENTIVE PLAN</B><BR>
(Full title of the Plan)
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>INCORPORATING SERVICES, INC.<BR>
15 EAST NORTH STREET<BR>
DOVER, DE 19901<BR>
(800)&nbsp;346-4646</B><BR>
(Name, address including zip code, and telephone number,<BR>
including area code, of agent for service)
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><I>Copies to:</I><BR>
Alan F. Denenberg, Esq.<BR>
Davis Polk &#038; Wardwell<BR>
1600 El Camino Real<BR>
Menlo Park, California 94025<BR>
(650)&nbsp;752-2000
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>CALCULATION OF REGISTRATION FEE</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="1%">&nbsp;</TD>
    <TD width="54%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>

    <TD width="1%">&nbsp;</TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="21" style="border-bottom: 3px double #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Proposed</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Proposed</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center"><B>Title of</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Maximum</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Maximum</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center"><B>Securities</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Amount</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Offering</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Aggregate</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Amount of</B></TD>
    <TD>&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center"><B>to be</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>to be</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Price</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Offering</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Registration</B></TD>
    <TD>&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>

    <TD nowrap align="center"><B>Registered</B></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Registered (1)</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>per Share (2)</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Price (2)</B></TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" colspan="2"><B>Fee</B></TD>
    <TD>&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
</TR>

<!-- End Table Head -->
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<TR valign="bottom">
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
                    <TD style="border-top: 2px solid #000000"><DIV style="margin-left:15px; text-indent:-15px">Common Stock, $0.001 par value</DIV></TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD nowrap colspan="3" align="center" style="border-top: 2px solid #000000">370,228 shares</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="left" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" style="border-top: 2px solid #000000">17.67</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="right" style="border-top: 2px solid #000000">6,541,929</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="left" style="border-top: 2px solid #000000">$</TD>
    <TD align="right" style="border-top: 2px solid #000000">201</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD width="1%" style="border-top: 2px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="21" style="border-top: 3px double #000000">&nbsp;</TD>
</TR>

<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="left">
<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>This Registration Statement covers shares being added to the Ultra Clean Holdings, Inc.
Amended and Restated Stock Incentive Plan. This Registration Statement shall also cover any
additional shares of common stock which become issuable under the Ultra Clean Holdings, Inc.
Amended and Restated Stock Incentive Plan by reason of any stock dividend, stock split,
recapitalization or other similar transaction effected without Registrant&#146;s receipt of
consideration which results in an increase in the number of the outstanding shares of
Registrant&#146;s common stock.</TD>
</TR>

<TR style="font-size: 3pt"><TD>&nbsp;</TD></TR>

<TR valign="top">
    <TD nowrap align="left">(2)</TD>
    <TD>&nbsp;</TD>
    <TD>Calculated under Rule 457(h) of the Securities Act of 1933, as amended (&#147;1933 Act&#148;), on the
basis of the average of the high and low selling prices per share of the Registrant&#146;s Common
Stock on April&nbsp;4, 2007 as reported by the NASDAQ Global Market.</TD>
</TR>

</TABLE>




<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>

<DIV style="font-family: 'Times New Roman',Times,serif">




<!-- TOC -->
<A name="toc"><DIV align="CENTER" style="page-break-before:always"><U><B>TABLE OF CONTENTS</B></U></DIV></A>

<P><CENTER>
<TABLE border="0" width="90%" cellpadding="0" cellspacing="0">
<TR>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="76%"></TD>
</TR>
<TR><TD></TD><TD colspan="8"><A HREF="#000">Item&nbsp;3. Incorporation of Documents by Reference</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#001">Item&nbsp;4. <u>Description of Securities</u></A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#002">Item&nbsp;5. Interests of Named Experts and Counsel</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#003">Item&nbsp;6. Indemnification of Directors and Officers</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#004">Item&nbsp;7. Exemption from Registration Claimed</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#005">Item&nbsp;8. Exhibits</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#006">Item&nbsp;9. <U>Undertakings</U></A></TD></TR>
<TR><TD colspan="9"><A HREF="#007">SIGNATURES</A></TD></TR>
<TR><TD colspan="9"><A HREF="#008">EXHIBIT INDEX</A></TD></TR>
<TR><TD colspan="9"><A HREF="f29102exv5w1.htm">EXHIBIT 5.1</A></TD></TR>
<TR><TD colspan="9"><A HREF="f29102exv23w1.htm">EXHIBIT 23.1</A></TD></TR>
</TABLE>
</CENTER>
<!-- /TOC -->
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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>





<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>PART II<BR>
Information Required in the Registration Statement</B>
</DIV>

<!-- link2 "Item&nbsp;3. Incorporation of Documents by Reference" -->
<DIV align="left"><A NAME="000"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Item&nbsp;3.
<u>Incorporation of Documents by Reference</u>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Ultra Clean Holdings, Inc. (the &#147;Registrant&#148;) hereby incorporates by reference into this
Registration Statement the following documents previously filed with the Securities and Exchange
Commission (the &#147;SEC&#148;):
</DIV>

<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">

<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(a)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Annual Report on Form 10-K for the fiscal year ended December
31, 2006, filed with the SEC on March&nbsp;29, 2007, pursuant to Section&nbsp;13 of the
Securities Exchange Act of 1934, as amended (the &#147;1934 Act&#148;);</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(b)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Current Report on Form 8-K filed with the SEC on February&nbsp;12,
2007, pursuant to Section&nbsp;13 or 15(d) of the 1934 Act; and</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="2%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(c)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The description of the Registrant&#146;s common stock contained in its Registration
Statement on Form 8-A, filed on March&nbsp;23, 2004, pursuant to Section 12(g) of the 1934
Act, including any amendment or report filed for the purpose of updating such
description.</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All reports and definitive proxy or information statements filed pursuant to Section&nbsp;13(a),
13(c), 14 or 15(d) of the 1934 Act after the date of this Registration Statement and prior to the
filing of a post-effective amendment which indicates that all securities offered hereby have been
sold or which deregisters all securities then remaining unsold shall be deemed to be incorporated
by reference into this Registration Statement and to be a part hereof from the date of filing of
such documents. Any statement contained in a document incorporated or deemed to be incorporated by
reference herein shall be deemed to be modified or superseded for purposes of this Registration
Statement to the extent that a statement contained herein or in any subsequently filed document
which also is deemed to be incorporated by reference herein modifies or supersedes such statement.
Any such statement so modified or superseded shall not be deemed, except as so modified or
superseded, to constitute a part of this Registration Statement.
</DIV>
<!-- link2 "Item&nbsp;4. <u>Description of Securities</u>" -->
<DIV align="left"><A NAME="001"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Item&nbsp;4. <u>Description of Securities</u>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not Applicable.
</DIV>
<!-- link2 "Item&nbsp;5. Interests of Named Experts and Counsel" -->
<DIV align="left"><A NAME="002"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Item&nbsp;5.
<u>Interests of Named Experts and Counsel</u>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not Applicable.
</DIV>
<!-- link2 "Item&nbsp;6. Indemnification of Directors and Officers" -->
<DIV align="left"><A NAME="003"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Item&nbsp;6.
<u>Indemnification of Directors and Officers</u>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<I>Delaware General Corporation Law</I>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;102(b)(7) of the Delaware General Corporation Law permits a corporation to provide in
its certificate of incorporation that a director of the corporation shall not be personally liable
to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a
director, except for liability for any breach of the director&#146;s duty of loyalty to the corporation
or its stockholders, for acts or omissions not in good faith or which involve intentional
misconduct or a knowing violation of law, for unlawful payments of dividends or unlawful stock
repurchases, redemptions or other distributions, or for any transaction from which the director
derived an improper personal benefit.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;145 of the Delaware General Corporation Law, as amended, provides that a corporation
may indemnify directors and officers as well as other employees and individuals against expenses
(including attorneys&#146; fees), judgments, fines and amounts paid in settlement actually and
reasonably incurred by such person in connection with any threatened, pending or completed actions,
suits or proceedings in which such person is made a party by reason of such person being or having
been a director, officer, employee or agent of the corporation, subject to certain
</DIV>

<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">limitations. The Delaware General Corporation Law provides that Section&nbsp;145 is not exclusive
of other rights to which those seeking indemnification may be entitled under any bylaw, agreement,
vote of stockholders or disinterested directors or otherwise.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><I>Amended and Restated Certificate of Incorporation and Bylaws</I>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Article&nbsp;Eight of our amended and restated certificate of incorporation provides for
indemnification by us of our directors, officers and employees to the fullest extent permitted by
Delaware law. Article&nbsp;Eight also provides that we may maintain insurance on behalf of our
directors, officers and employees.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><I>Indemnification Agreements and Directors&#146; and Officers&#146; Liability Insurance</I>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Registrant expects to maintain standard policies of insurance that provide coverage (1)&nbsp;to
our directors and officers against loss rising from claims made by reason of breach of duty or
other wrongful act, and (2)&nbsp;to us with respect to indemnification payments that we may make to such
directors and officers.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We have also entered into separate indemnification agreements with our directors and officers
which may be broader than the indemnification provisions contained in Delaware law.
</DIV>
<!-- link2 "Item&nbsp;7. Exemption from Registration Claimed" -->
<DIV align="left"><A NAME="004"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Item&nbsp;7. <u>Exemption from Registration Claimed</u>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Not Applicable.
</DIV>
<!-- link2 "Item&nbsp;8. Exhibits" -->
<DIV align="left"><A NAME="005"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Item&nbsp;8. <u>Exhibits</u>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="12%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="85%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Exhibit Number</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Exhibit</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Davis Polk &#038; Wardwell</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Independent Registered Public Accounting Firm</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Davis Polk &#038; Wardwell (included in Exhibit&nbsp;5.1)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney (included on signature page)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1(1)
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Ultra Clean Holdings, Inc. Amended and Restated Stock Incentive Plan</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<DIV align="left">
<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>Incorporated by reference to Exhibit&nbsp;99.1 of the Registrant&#146;s Form S-8 filed on
March&nbsp;30, 2004.</TD>
</TR>

</TABLE>


<!-- link2 "Item&nbsp;9. <U>Undertakings</U>" -->
<DIV align="left"><A NAME="006"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Item&nbsp;9. <U>Undertakings</U>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;a.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The undersigned Registrant hereby undertakes:
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(1)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;to file, during any period in which offers or sales are being made, a
post-effective amendment to this Registration Statement to include any material information
with respect to the plan of distribution not previously disclosed in this Registration
Statement or any material change to such information in this Registration Statement;
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(2)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;that for the purpose of determining any liability under the 1933 Act each such
post-effective amendment shall be deemed to be a new registration statement relating to the
securities offered therein and the offering of such securities at that time shall be deemed
to be the initial bona fide offering thereof; and
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt; margin-left: 2%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(3)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;to remove from registration by means of a post-effective amendment any of the
securities being registered which remain unsold at the termination of the offering.
</DIV>

<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;b.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The undersigned Registrant hereby undertakes that, for purposes of determining any
liability under the 1933 Act, each filing of the Registrant&#146;s annual report pursuant to Section
13(a) or Section 15(d) of the 1934 Act that is incorporated by reference into this Registration
Statement shall be deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;c.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Insofar as indemnification for liabilities arising under the 1933 Act may be permitted to
directors, officers, or controlling persons of the Registrant pursuant to the indemnification
foregoing provisions summarized in Item&nbsp;6 or otherwise, the Registrant has been advised that, in
the opinion of the SEC, such indemnification is against public policy as expressed in the 1933 Act,
and is, therefore, unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or paid by a director,
officer, or controlling person of the Registrant in the successful defense of any action, suit, or
proceeding) is asserted by such director, officer, or controlling person in connection with the
securities being registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate jurisdiction the
question whether such indemnification by it is against public policy as expressed in the 1933 Act
and will be governed by the final adjudication of such issue.
</DIV>

<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">
<!-- link1 "SIGNATURES" -->
<DIV align="left"><A NAME="007"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>SIGNATURES</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;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 Menlo Park, State of California, on the
9<SUP style="font-size: 85%; vertical-align: text-top">th </SUP>day of April, 2007.
</DIV>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left"><B>Ultra Clean Holdings, Inc.</B><BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left"> /s/ Clarence L. Granger
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Clarence L. Granger&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Chief Executive Officer&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Date: April&nbsp;09, 2007
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<B>KNOW ALL PERSONS BY THESE PRESENTS</B>, that each person whose signature appears below constitutes
and appoints Clarence L. Granger and Jack Sexton, 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.
</DIV>
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">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.
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Name</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Title</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Date</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Chief Executive Officer (Principal
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">April&nbsp;09, 2007</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top" style="border-bottom: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">/s/ Clarence L. Granger
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Executive Officer) and Director</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Clarence L. Granger</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top" style="border-bottom: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">/s/ Leonid Mezhvinsky
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">President and Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">April&nbsp;09, 2007</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Leonid Mezhvinsky</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Vice President and Chief Financial Officer
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">April&nbsp;09, 2007</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Principal Financial Officer and</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top" style="border-bottom: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">/s/ Jack Sexton
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Principal Accounting Officer)</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Jack Sexton</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" style="border-bottom: 1px solid #000000" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Brian R. Bachman
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">April&nbsp;09, 2007</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Brian R. Bachman</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD style="border-bottom: 1px solid #000000" align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Susan H. Billat
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">April&nbsp;09, 2007</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Susan H. Billat</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD style="border-bottom: 1px solid #000000" align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">/s/ Kevin C. Eichler
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">April&nbsp;09, 2007</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Kevin C. Eichler</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top" style="border-bottom: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">/s/ David ibnAle
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">April&nbsp;09, 2007</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">David ibnAle</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top" style="border-bottom: 1px solid #000000"><DIV style="margin-left:0px; text-indent:-0px">/s/ Thomas M. Rohrs
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">April&nbsp;09, 2007</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">Thomas M. Rohrs</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>

<DIV style="font-family: 'Times New Roman',Times,serif">

<!-- link1 "EXHIBIT INDEX" -->
<DIV align="left"><A NAME="008"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>EXHIBIT INDEX</B>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="12%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="85%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Exhibit Number</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Exhibit</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Davis Polk &#038; Wardwell</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Independent Registered Public Accounting Firm</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Davis Polk &#038; Wardwell (included in Exhibit&nbsp;5.1)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney (included on signature page)</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1(1)
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Ultra Clean Holdings, Inc. Amended and Restated Stock Incentive Plan</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



<DIV align="left">
<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 1px solid #000000">&nbsp;</DIV>
</DIV>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD width="96"></TD>
</TR>

<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>Incorporated by reference to Exhibit&nbsp;99.1 of the Registrant&#146;s Form S-8 filed on
March&nbsp;30, 2004.</TD>
</TR>

</TABLE>



<DIV style="margin-top: 6pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">



</TABLE>
</DIV>
<P align="center" style="font-size: 10pt">&nbsp;
</DIV>

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{"company-data": {"conformed-name": "ULTRA CLEAN HOLDINGS INC", "cik": "0001275014", "assigned-sic": "3674", "irs-number": "611430858", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-141989", "film-number": "07757693"}, "mail-address": {"street1": "150 INDEPENDENCE DRIVE", "city": "MENLO PARK", "state": "CA", "zip": "94025"}}
sv8
Table of Contents
As filed with the Securities and Exchange Commission on April 09, 2007
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
61-1430858
(State or other jurisdiction
of incorporation or organization)
(IRS Employer Identification No.)
150 INDEPENDENCE DRIVE
MENLO PARK, CA 94025
(Address of principal executive offices) (Zip Code)
ULTRA CLEAN HOLDINGS, INC. AMENDED AND RESTATED STOCK INCENTIVE PLAN
(Full title of the Plan)
INCORPORATING SERVICES, INC.
15 EAST NORTH STREET
DOVER, DE 19901
(800) 346-4646
(Name, address including zip code, and telephone number,
including area code, of agent for service)
Copies to:
Alan F. Denenberg, Esq.
Davis Polk & Wardwell
1600 El Camino Real
Menlo Park, California 94025
(650) 752-2000
CALCULATION OF REGISTRATION FEE
Proposed
Proposed
Title of
Maximum
Maximum
Securities
Amount
Offering
Aggregate
Amount of
to be
to be
Price
Offering
Registration
Registered
Registered (1)
per Share (2)
Price (2)
Fee
Common Stock, $0.001 par value
370,228 shares
$
17.67
6,541,929
$
201
(1)
This Registration Statement covers shares being added to the Ultra Clean Holdings, Inc.
Amended and Restated Stock Incentive Plan. This Registration Statement shall also cover any
additional shares of common stock which become issuable under the Ultra Clean Holdings, Inc.
Amended and Restated Stock Incentive Plan by reason of any stock dividend, stock split,
recapitalization or other similar transaction effected without Registrant's receipt of
consideration which results in an increase in the number of the outstanding shares of
Registrant's common stock.
(2)
Calculated under Rule 457(h) of the Securities Act of 1933, as amended ("1933 Act"), on the
basis of the average of the high and low selling prices per share of the Registrant's Common
Stock on April 4, 2007 as reported by the NASDAQ Global Market.
TABLE OF CONTENTS
Item 3. Incorporation of Documents by Reference
Item 4.
Description of Securities
Item 5. Interests of Named Experts and Counsel
Item 6. Indemnification of Directors and Officers
Item 7. Exemption from Registration Claimed
Item 8. Exhibits
Item 9.
Undertakings
SIGNATURES
EXHIBIT INDEX
EXHIBIT 5.1
EXHIBIT 23.1
Table of Contents
PART II
Information Required in the Registration Statement
Item 3.
Incorporation of Documents by Reference
Ultra Clean Holdings, Inc. (the "Registrant") hereby incorporates by reference into this
Registration Statement the following documents previously filed with the Securities and Exchange
Commission (the "SEC"):
(a)
The Registrant's Annual Report on Form 10-K for the fiscal year ended December
31, 2006, filed with the SEC on March 29, 2007, pursuant to Section 13 of the
Securities Exchange Act of 1934, as amended (the "1934 Act");
(b)
The Registrant's Current Report on Form 8-K filed with the SEC on February 12,
2007, pursuant to Section 13 or 15(d) of the 1934 Act; and
(c)
The description of the Registrant's common stock contained in its Registration
Statement on Form 8-A, filed on March 23, 2004, pursuant to Section 12(g) of the 1934
Act, including any amendment or report filed for the purpose of updating such
description.
All reports and definitive proxy or information statements filed pursuant to Section 13(a),
13(c), 14 or 15(d) of the 1934 Act after the date of this Registration Statement and prior to the
filing of a post-effective amendment which indicates that all securities offered hereby have been
sold or which deregisters all securities then remaining unsold shall be deemed to be incorporated
by reference into this Registration Statement and to be a part hereof from the date of filing of
such documents. Any statement contained in a document incorporated or deemed to be incorporated by
reference herein shall be deemed to be modified or superseded for purposes of this Registration
Statement to the extent that a statement contained herein or in any subsequently filed document
which also is deemed to be incorporated by reference herein modifies or supersedes such statement.
Any such statement so modified or superseded shall not be deemed, except as so modified or
superseded, to constitute a part of this Registration Statement.
Item 4.
Description of Securities
Not Applicable.
Item 5.
Interests of Named Experts and Counsel
Not Applicable.
Item 6.
Indemnification of Directors and Officers
Delaware General Corporation Law
Section 102(b)(7) of the Delaware General Corporation Law permits a corporation to provide in
its certificate of incorporation that a director of the corporation shall not be personally liable
to the corporation or its stockholders for monetary damages for breach of fiduciary duty as a
director, except for liability for any breach of the director's duty of loyalty to the corporation
or its stockholders, for acts or omissions not in good faith or which involve intentional
misconduct or a knowing violation of law, for unlawful payments of dividends or unlawful stock
repurchases, redemptions or other distributions, or for any transaction from which the director
derived an improper personal benefit.
Section 145 of the Delaware General Corporation Law, as amended, provides that a corporation
may indemnify directors and officers as well as other employees and individuals against expenses
(including attorneys' fees), judgments, fines and amounts paid in settlement actually and
reasonably incurred by such person in connection with any threatened, pending or completed actions,
suits or proceedings in which such person is made a party by reason of such person being or having
been a director, officer, employee or agent of the corporation, subject to certain
Table of Contents
limitations. The Delaware General Corporation Law provides that Section 145 is not exclusive
of other rights to which those seeking indemnification may be entitled under any bylaw, agreement,
vote of stockholders or disinterested directors or otherwise.
Amended and Restated Certificate of Incorporation and Bylaws
Article Eight of our amended and restated certificate of incorporation provides for
indemnification by us of our directors, officers and employees to the fullest extent permitted by
Delaware law. Article Eight also provides that we may maintain insurance on behalf of our
directors, officers and employees.
Indemnification Agreements and Directors' and Officers' Liability Insurance
The Registrant expects to maintain standard policies of insurance that provide coverage (1) to
our directors and officers against loss rising from claims made by reason of breach of duty or
other wrongful act, and (2) to us with respect to indemnification payments that we may make to such
directors and officers.
We have also entered into separate indemnification agreements with our directors and officers
which may be broader than the indemnification provisions contained in Delaware law.
Item 7.
Exemption from Registration Claimed
Not Applicable.
Item 8.
Exhibits
Exhibit Number
Exhibit
5.1
Opinion of Davis Polk & Wardwell
23.1
Consent of Independent Registered Public Accounting Firm
23.2
Consent of Davis Polk & Wardwell (included in Exhibit 5.1)
24
Power of Attorney (included on signature page)
99.1(1)
Ultra Clean Holdings, Inc. Amended and Restated Stock Incentive Plan
(1)
Incorporated by reference to Exhibit 99.1 of the Registrant's Form S-8 filed on
March 30, 2004.
Item 9.
Undertakings
a.     The undersigned Registrant hereby undertakes:
(1)     to file, during any period in which offers or sales are being made, a
post-effective amendment to this Registration Statement to include any material information
with respect to the plan of distribution not previously disclosed in this Registration
Statement or any material change to such information in this Registration Statement;
(2)     that for the purpose of determining any liability under the 1933 Act each such
post-effective amendment shall be deemed to be a new registration statement relating to the
securities offered therein and the offering of such securities at that time shall be deemed
to be the initial bona fide offering thereof; and
(3)     to remove from registration by means of a post-effective amendment any of the
securities being registered which remain unsold at the termination of the offering.
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b.     The undersigned Registrant hereby undertakes that, for purposes of determining any
liability under the 1933 Act, each filing of the Registrant's annual report pursuant to Section
13(a) or Section 15(d) of the 1934 Act that is incorporated by reference into this Registration
Statement shall be deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be the initial bona
fide offering thereof.
c.     Insofar as indemnification for liabilities arising under the 1933 Act may be permitted to
directors, officers, or controlling persons of the Registrant pursuant to the indemnification
foregoing provisions summarized in Item 6 or otherwise, the Registrant has been advised that, in
the opinion of the SEC, such indemnification is against public policy as expressed in the 1933 Act,
and is, therefore, unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or paid by a director,
officer, or controlling person of the Registrant in the successful defense of any action, suit, or
proceeding) is asserted by such director, officer, or controlling person in connection with the
securities being registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate jurisdiction the
question whether such indemnification by it is against public policy as expressed in the 1933 Act
and will be governed by the final adjudication of such issue.
Table of Contents
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 Menlo Park, State of California, on the
9
th
day of April, 2007.
Ultra Clean Holdings, Inc.
By:
/s/ Clarence L. Granger
Clarence L. Granger
Chief Executive Officer
Date: April 09, 2007
KNOW ALL PERSONS BY THESE PRESENTS
, that each person whose signature appears below constitutes
and appoints Clarence L. Granger and Jack Sexton, 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
Chief Executive Officer (Principal
April 09, 2007
/s/ Clarence L. Granger
Executive Officer) and Director
Clarence L. Granger
/s/ Leonid Mezhvinsky
President and Director
April 09, 2007
Leonid Mezhvinsky
Vice President and Chief Financial Officer
April 09, 2007
(Principal Financial Officer and
/s/ Jack Sexton
Principal Accounting Officer)
Jack Sexton
/s/ Brian R. Bachman
Director
April 09, 2007
Brian R. Bachman
/s/ Susan H. Billat
Director
April 09, 2007
Susan H. Billat
/s/ Kevin C. Eichler
Director
April 09, 2007
Kevin C. Eichler
/s/ David ibnAle
Director
April 09, 2007
David ibnAle
/s/ Thomas M. Rohrs
Director
April 09, 2007
Thomas M. Rohrs
Table of Contents
EXHIBIT INDEX
Exhibit Number
Exhibit
5.1
Opinion of Davis Polk & Wardwell
23.1
Consent of Independent Registered Public Accounting Firm
23.2
Consent of Davis Polk & Wardwell (included in Exhibit 5.1)
24
Power of Attorney (included on signature page)
99.1(1)
Ultra Clean Holdings, Inc. Amended and Restated Stock Incentive Plan
(1)
Incorporated by reference to Exhibit 99.1 of the Registrant's Form S-8 filed on
March 30, 2004.