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      <TD borderColor=#000000 align=center colSpan=2 rowSpan=3><FONT
        face="Times New Roman, Times, serif"><STRONG><FONT size=4>UNITED
        STATES</FONT></STRONG><FONT size=4><STRONG><BR>
        SECURITIES AND EXCHANGE
        COMMISSION<BR>Washington, D.C. 20549</STRONG></FONT></FONT></TD>
      <TD
      style="BORDER-RIGHT: #000000 0.5pt solid; BORDER-TOP: #000000 0.5pt solid; BORDER-LEFT: #000000 0.5pt solid; BORDER-BOTTOM: #000000 0.5pt solid"
      noWrap align=middle colSpan=2><FONT face="Arial, Helvetica, sans-serif"
        size=1>OMB APPROVAL</FONT></TD></TR>
    <TR>
      <TD
      style="BORDER-LEFT: #000000 0.5pt solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 0.5pt solid; BORDER-RIGHT-COLOR: #000000"
      vAlign=top noWrap align=left width="9%"><FONT
        face="Arial, Helvetica, sans-serif" size=1>OMB Number:</FONT></TD>
      <TD
      style="BORDER-RIGHT: #000000 0.5pt solid; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 0.5pt solid"
      vAlign=top noWrap align=right width="11%"><FONT
        face="Arial, Helvetica, sans-serif" size=1>3235-0101</FONT></TD></TR>
    <TR>
      <TD
      style="BORDER-LEFT: #000000 0.5pt solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 0.5pt solid; BORDER-RIGHT-COLOR: #000000"
      vAlign=top noWrap align=left width="9%"><FONT
        face="Arial, Helvetica, sans-serif" size=1>Expires:</FONT></TD>
      <TD
      style="BORDER-RIGHT: #000000 0.5pt solid; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 0.5pt solid"
      vAlign=top noWrap align=right width="11%"><FONT
        face="Arial, Helvetica, sans-serif" size=1>December 31, 2006 </FONT></TD></TR>
    <TR>
      <TD vAlign=top borderColor=#000000 align=center width="15%">&nbsp;</TD>
      <TD vAlign=top borderColor=#000000 align=center width="65%">&nbsp;</TD>
      <TD
      style="BORDER-RIGHT: #000000 0.5pt solid; BORDER-BOTTOM-COLOR: #000000; BORDER-LEFT: #000000 0.5pt solid; BORDER-TOP-COLOR: #000000"
      vAlign=bottom noWrap align=left colSpan=2><FONT
        face="Arial, Helvetica, sans-serif" size=1>Estimated average burden
        hours</FONT></TD></TR>
    <TR>
      <TD vAlign=top borderColor=#000000 align=center colSpan=2><STRONG><FONT
        face="Times New Roman, Times, serif" size=4>FORM 144</FONT></STRONG></TD>
      <TD
      style="BORDER-LEFT: #000000 0.5pt solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 0.5pt solid; BORDER-RIGHT-COLOR: #000000"
      vAlign=top noWrap align=left width="9%"><FONT
        face="Arial, Helvetica, sans-serif" size=1>per response</FONT></TD>
      <TD
      style="BORDER-RIGHT: #000000 0.5pt solid; BORDER-LEFT-COLOR: #000000; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 0.5pt solid"
      vAlign=top noWrap align=right width="11%"><FONT
        face="Arial, Helvetica, sans-serif" size=1>4.47</FONT></TD></TR>
    <TR>
      <TD vAlign=top borderColor=#000000 align=center>&nbsp;</TD>
      <TD vAlign=top borderColor=#000000 align=center width="65%">&nbsp;</TD>
      <TD vAlign=top noWrap align=left width="9%"><FONT size=1>&nbsp;</FONT></TD>
      <TD vAlign=top noWrap align=right width="11%"><FONT
    size=1>&nbsp;</FONT></TD></TR>
    <TR>
      <TD vAlign=center borderColor=#000000 align=center colSpan=2
        rowSpan=2><FONT size=3><STRONG><FONT
        face="Times New Roman, Times, serif">NOTICE OF PROPOSED SALE OF
        SECURITIES</FONT></STRONG><FONT
        face="Times New Roman, Times, serif"><STRONG><BR>
        PURSUANT TO RULE 144
        UNDER THE SECURITIES ACT OF 1933</STRONG></FONT></FONT></TD>
      <TD
      style="BORDER-RIGHT: #000000 0.5pt solid; BORDER-TOP: #000000 0.5pt solid; BORDER-LEFT: #000000 0.5pt solid; BORDER-BOTTOM: #000000 0.5pt solid"
      vAlign=top noWrap align=middle colSpan=2><FONT
        face="Arial, Helvetica, sans-serif" size=1>SEC USE ONLY</FONT></TD></TR>
    <TR>
      <TD
      style="BORDER-RIGHT: #000000 0.5pt solid; BORDER-LEFT: #000000 0.5pt solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 0.5pt solid"
      vAlign=top noWrap align=left colSpan=2><FONT
        face="Arial, Helvetica, sans-serif" size=1>DOCUMENT SEQUENCE
      NO.<BR></FONT></TD></TR>
    <TR>
      <TD vAlign=top borderColor=#000000>&nbsp;</TD>
      <TD vAlign=top borderColor=#000000 width="65%">&nbsp;</TD>
      <TD
      style="BORDER-RIGHT: #000000 0.5pt solid; BORDER-LEFT: #000000 0.5pt solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 0.5pt solid"
      vAlign=top noWrap align=left colSpan=2><FONT
        face="Arial, Helvetica, sans-serif" size=1>CUSIP NUMBER<BR></FONT></TD></TR>
    <TR>
      <TD vAlign=top borderColor=#000000><FONT
        face="Times New Roman, Times, serif"
        size=3><STRONG>ATTENTION:</STRONG></FONT></TD>
      <TD vAlign=top borderColor=#000000 width="65%"><FONT
        face="Times New Roman, Times, serif" size=2><EM>Transmit for filing 3
        copies of this form concurrently with either placing an order with a
        broker to execute sale or executing a sale directly with a market
        maker</EM></FONT></TD>
      <TD
      style="BORDER-RIGHT: #000000 0.5pt solid; BORDER-LEFT: #000000 0.5pt solid; BORDER-TOP-COLOR: #000000; BORDER-BOTTOM: #000000 0.5pt solid"
      vAlign=top noWrap align=left colSpan=2><FONT
        face="Arial, Helvetica, sans-serif" size=1>WORK
  LOCATION<BR></FONT></TD></TR></TABLE><BR>
  <TABLE borderColor=#999999 cellSpacing=0 cellPadding=2 width="100%" border=1>
  
    <TR vAlign=top>
      <TD colSpan=6><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">1 (a) NAME OF ISSUER (<EM>Please type
        or print</EM>)<BR>
        <font size="2">ULTRA CLEAN HOLDINGS, INC. </font><BR>
        <BR></FONT></TD>
      <TD width="11%"><p><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">(b) IRS IDENT. NO. <br>
            <font size="2">61-1430858</font>    </FONT></p>      </TD>
      <TD width="11%"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">(c) S.E.C. FILE NO. <br>
          <font size="2">000-50646</font></FONT></TD>
    </TR>
    <TR>
      <TD vAlign=top colSpan=6 rowSpan=2><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">1 (d) ADDRESS OF
        ISSUER&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;STREET&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CITY&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;STATE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ZIP
        CODE<BR><BR>
        <font size="2">150&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Independence
        Drive&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Menlo
        Park&nbsp;&nbsp;&nbsp;CA&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;94025 </font><BR>
      </FONT></TD>
      <TD align=middle colSpan=2><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">(e) TELEPHONE NO.</FONT></TD></TR>
    <TR vAlign=top>
      <TD width="11%"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Area Code<BR>
          <font size="2">650</font><BR>
      </FONT></TD>
      <TD width="11%"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Number<BR>
          <font size="2">323-4100</font></FONT></TD>
    </TR>
    <TR vAlign=top>
      <TD colSpan=2><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">2 (a) NAME OF PERSON FOR WHOSE ACCOUNT
        THE SECURITIES ARE TO BE SOLD<BR>
        <font size="2">Bruce Wier</font> <BR>
      </FONT></TD>
      <TD width="11%"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">(b) IRS IDENT. NO.<br>
          <font size="2">N/A</font></FONT></TD>
      <TD colSpan=2><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">(c) RELATIONSHIP TO ISSUER<br>
          <font size="2">Executive officer</font></FONT></TD>
      <TD colSpan=3><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">(d)
        ADDRESS&nbsp;&nbsp;&nbsp;&nbsp;STREET&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CITY&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;STATE&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;ZIP
        CODE<br>
        <font size="2">c/o Ultra Clean<br>
        150 Independence &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Menlo
        Park &nbsp;&nbsp;&nbsp; &nbsp;CA &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;94025<br>
        </font><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif"><font size="2">Drive</font></FONT><font size="2">      </font></FONT></TD>
    </TR>
    <TR align=middle>
      <TD colSpan=8><FONT face="Arial, Helvetica, sans-serif"
        size=2><EM>INSTRUCTION: The person filing this notice should contact the
        issuer to obtain the I.R.S. Identification Number and the S.E.C. File
        Number.</EM></FONT></TD></TR>
    <TR vAlign=top>
      <TD width="11%" rowSpan=2><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">3(a) Title of the Class of Securities
        To Be Sold</FONT></TD>
      <TD width="23%" rowSpan=2><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">(b) Name and Address of Each Broker
        Through whom the Securities are to be Offered or Each Market Maker who is
        Acquiring the Securities</FONT></TD>
      <TD align=middle width="11%"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif"><STRONG>SEC USE
  ONLY</STRONG></FONT></TD>
      <TD width="11%" rowSpan=2><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">(c) Number of Shares or Other Units To
        Be Sold<BR>(<EM>See instr. 3(c)</EM>)</FONT></TD>
      <TD width="11%" rowSpan=2><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">(d) Aggregate Market Value<BR>(<EM>See
        instr. 3(d)</EM>)</FONT></TD>
      <TD width="11%" rowSpan=2><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">(e) Number of Shares or Other Units
        Outstanding<BR>(<EM>See instr. 3(e)</EM>)</FONT></TD>
      <TD width="11%" rowSpan=2><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">(f) Approximate Date of
        Sale<BR>(<EM>See instr. 3(f)</EM>)<BR>(MO. DAY YR.)</FONT></TD>
      <TD width="11%" rowSpan=2><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">(g) Name of Each Securities
        Exchange<BR>(<EM>See instr. 3(g)</EM>)</FONT></TD></TR>
    <TR vAlign=top>
      <TD><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Broker-Dealer<BR>File
    Number</FONT></TD></TR>
    <TR align="center" valign="top">
      <TD width="11%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">common
          stock, par value $0.001 </font></TD>
      <TD width="23%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">Wells
          Fargo Investments<br>
          60 West Hamilton <br>
        Campbell, CA 95008 </font></TD>
      <TD width="11%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">&nbsp;</font></TD>
      <TD width="11%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">10,000</font></TD>
      <TD width="11%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">$91,200</font></TD>
      <TD width="11%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">18,285,010</font></TD>
      <TD width="11%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">5/11/06</font></TD>
      <TD width="11%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">NASDAQ Stock Market </font></TD>
    </TR>
    <TR>
      <TD width="11%">&nbsp;</TD>
      <TD width="23%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD></TR>
    <TR>
      <TD width="11%">&nbsp;</TD>
      <TD width="23%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD></TR>
    <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD></TR>
    <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
  <TD>&nbsp;</TD></TR></TABLE>
  <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
  
    <TR align=left>
      <TD vAlign=top colSpan=3><FONT face="Arial, Helvetica, sans-serif"
        size=1>INSTRUCTIONS:</FONT></TD>
      <TD vAlign=top width="5%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="42%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD></TR>
    <TR vAlign=top align=left>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
      size=1>1.</FONT></TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
      size=1>(a)</FONT></TD>
      <TD width="41%"><FONT face="Arial, Helvetica, sans-serif" size=1>Name of
        issuer</FONT></TD>
      <TD width="5%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
      size=1>3.</FONT></TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
      size=1>(a)</FONT></TD>
      <TD width="42%"><FONT face="Arial, Helvetica, sans-serif" size=1>Title of
        the class of securities to be sold</FONT></TD></TR>
    <TR vAlign=top align=left>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
      size=1>(b)</FONT></TD>
      <TD width="41%"><FONT face="Arial, Helvetica, sans-serif" size=1>Issuer&#146;s
        I.R.S. Identification Number</FONT></TD>
      <TD width="5%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
      size=1>(b)</FONT></TD>
      <TD width="42%"><FONT face="Arial, Helvetica, sans-serif" size=1>Name and
        address of each broker through whom the securities are</FONT></TD></TR>
    <TR vAlign=top align=left>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>&nbsp;</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>(c)</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>Issuer&#146;s S.E.C. file
        number, if any</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>&nbsp;</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>&nbsp;</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>&nbsp;</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>intended to be
        sold</FONT></TD></TR>
    <TR vAlign=top align=left>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
      size=1>(d)</FONT></TD>
      <TD width="41%"><FONT face="Arial, Helvetica, sans-serif" size=1>Issuer&#146;s
        address, including zip code</FONT></TD>
      <TD width="5%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
      size=1>(c)</FONT></TD>
      <TD width="42%"><FONT face="Arial, Helvetica, sans-serif" size=1>Number of
        shares or other units to be sold (if debt securities,</FONT></TD></TR>
    <TR vAlign=top align=left>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>&nbsp;</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>(e)</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>Issuer&#146;s telephone
        number, including area code</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>&nbsp;</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>&nbsp;</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>&nbsp;</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>give the aggregate
        face amount)</FONT></TD></TR>
    <TR vAlign=top align=left>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD width="41%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>&nbsp;</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>&nbsp;</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>(d)</FONT></TD>
      <TD><FONT face="Arial, Helvetica, sans-serif" size=1>Aggregate market
        value of the securities to be sold as of a specified date</FONT></TD></TR>
    <TR vAlign=top align=left>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
      size=1>2.</FONT></TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
      size=1>(a)</FONT></TD>
      <TD width="41%"><FONT face="Arial, Helvetica, sans-serif" size=1>Name of
        person for whose account the securities are to be sold</FONT></TD>
      <TD width="5%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD width="42%"><FONT face="Arial, Helvetica, sans-serif" size=1>within 10
        days prior to the filing of this notice</FONT></TD></TR>
    <TR align=left>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif"
      size=1>(b)</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif" size=1>Such
        person&#146;s I.R.S. identification number, if such person is an
      entity</FONT></TD>
      <TD vAlign=top width="5%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>(e)</FONT></TD>
      <TD vAlign=top width="42%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>Number of shares or other units of the class outstanding, or if
        debt</FONT></TD></TR>
    <TR align=left>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>(c)</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif" size=1>Such
        person&#146;s relationship to the issuer (e.g., officer, director,</FONT></TD>
      <TD vAlign=top width="5%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif" size=1>securities
        the face amount thereof outstanding, as shown by</FONT></TD></TR>
    <TR align=left>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="41%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>10% stockholder, or member of immediate family of any of the
        foregoing)</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif" size=1>the most
        recent report or statement published by the issuer</FONT></TD></TR>
    <TR align=left>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif"
      size=1>(d)</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif" size=1>Such
        person&#146;s address, including zip code</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>(f)</FONT></TD>
      <TD vAlign=top width="42%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>Approximate date on which the securities are to be
  sold</FONT></TD></TR>
    <TR align=left>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="41%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="5%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>(g)</FONT></TD>
      <TD vAlign=top width="42%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>Name of each securities exchange, if any, on which the
        securities</FONT></TD></TR>
    <TR align=left>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="5%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>&nbsp;</FONT></TD>
      <TD vAlign=top width="42%"><FONT face="Arial, Helvetica, sans-serif"
        size=1>are intended to be sold</FONT></TD></TR></TABLE>
  <table width="100%"  border="1" cellspacing="0" cellpadding="4">
    <tr>
      <td><strong><font size="2" face="sans-serif">Potential persons who are to respond to the collection of information
        contained in this form are not required to respond unless the form displays
        a currently valid OMB control number. </font></strong></td>
    </tr>
  </table>
  <BR><BR>
  <HR color=gray noShade SIZE=3>
  <!-- *************************************************************************** --><!-- MARKER PAGE="sheet: 1; page: 1" --><BR><BR><BR><BR>
  <TABLE borderColor=#999999 cellSpacing=0 cellPadding=0 width="100%" border=1>
  
    <TR align="center">
      <TD colSpan=7><FONT face="Arial, Helvetica, sans-serif"
        size=2><STRONG>TABLE I &#150; SECURITIES TO BE
        SOLD</STRONG></FONT><BR><EM><FONT face="Arial, Helvetica, sans-serif"
        size=2>Furnish the following information with respect to the acquisition
        of the securities to be sold<BR>and with respect to the payment of all or
        any part of the purchase price or other consideration
      therefor:</FONT></EM></TD></TR>
    <TR vAlign=bottom align=center>
      <TD width="12%"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Title of the Class</FONT></TD>
      <TD width="10%"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Date you Acquired</FONT></TD>
      <TD width="20%"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Nature of Acquisition
        Transaction</FONT></TD>
      <TD width="15%"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Name of Person from Whom Acquired
        (<EM>if gift, also give date donor acquired</EM>)</FONT></TD>
      <TD width="12%"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Amount of Securities
  Acquired</FONT></TD>
      <TD width="11%"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Date of Payment</FONT></TD>
      <TD width="20%"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Nature of Payment</FONT></TD></TR>
    <TR align="center" valign="top">
      <TD width="12%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">common
          stock, par value $0.001</font></TD>
      <TD width="10%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">11/26/02</font></TD>
      <TD width="20%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">Purchase of restricted securities </font></TD>
      <TD width="15%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">Ultra Clean Holdings, Inc.</font></TD>
      <TD width="12%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">53,075</font></TD>
      <TD width="11%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">11/26/02</font></TD>
      <TD width="20%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">Cash</font></TD>
    </TR>
    <TR>
      <TD width="12%">&nbsp;</TD>
      <TD width="10%">&nbsp;</TD>
      <TD width="20%">&nbsp;</TD>
      <TD width="15%">&nbsp;</TD>
      <TD width="12%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD>
      <TD width="20%">&nbsp;</TD></TR>
    <TR>
      <TD width="12%">&nbsp;</TD>
      <TD width="10%">&nbsp;</TD>
      <TD width="20%">&nbsp;</TD>
      <TD width="15%">&nbsp;</TD>
      <TD width="12%">&nbsp;</TD>
      <TD width="11%">&nbsp;</TD>
      <TD width="20%">&nbsp;</TD></TR>
    <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD></TR>
    <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
  <TD>&nbsp;</TD></TR></TABLE>
  <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
  
    <TR>
      <TD colSpan=3><FONT face="Times New Roman, Times, serif"
        size=2><STRONG>INSTRUCTIONS:</STRONG></FONT></TD></TR>
    <TR vAlign=top>
      <TD align=middle width="3%">&nbsp;</TD>
      <TD width="3%"><FONT face="Arial, Helvetica, sans-serif"
        size=2>&nbsp;</FONT></TD>
      <TD width="94%"><FONT face="Arial, Helvetica, sans-serif" size=2>If the
        securities were purchased and full payment therefor was not made in cash
        at the time of purchase, explain in the table or in a note thereto the
        nature of the consideration given. If the consideration consisted of any
        note or other obligation, or if payment was made in installments describe
        the arrangement and state when the note or other obligation was discharged
        in full or the last installment paid.</FONT></TD></TR></TABLE><BR>
  <TABLE cellSpacing=0 cellPadding=0 width="100%" border=1>
  
    <TR align=center>
      <TD colSpan=5><FONT face="Arial, Helvetica, sans-serif"
        size=2><STRONG>TABLE II &#150; SECURITIES SOLD DURING THE PAST 3
        MONTHS</STRONG></FONT><BR>
        <EM><FONT face="Arial, Helvetica, sans-serif"
        size=2>Furnish the following information as to all securities of the
        issuer sold<BR>during the past 3 months by the person for whose account
      the securities are to be sold.</FONT></EM></TD></TR>
    <TR vAlign=bottom align=middle>
      <TD width="55%" align="center"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Name and Address of Seller</FONT></TD>
      <TD width="15%" align="center"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Title of Securities Sold</FONT></TD>
      <TD width="10%" align="center"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Date of Sale</FONT></TD>
      <TD width="15%" align="center"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Amount of Securities Sold</FONT></TD>
      <TD width="15%" align="center"><FONT style="FONT-SIZE: 6pt"
        face="Arial, Helvetica, sans-serif">Gross Proceeds</FONT></TD>
    </TR>
    <TR align="center">
      <TD width="55%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">N/A</font></TD>
      <TD width="15%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">N/A</font></TD>
      <TD width="10%" borderColor=#999999><font size="2" face="Geneva, Arial, Helvetica, sans-serif">N/A</font></TD>
      <TD width="15%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">N/A</font></TD>
      <TD width="15%"><font size="2" face="Geneva, Arial, Helvetica, sans-serif">N/A</font></TD>
    </TR>
    <TR>
      <TD width="55%">&nbsp;</TD>
      <TD width="15%">&nbsp;</TD>
      <TD width="10%">&nbsp;</TD>
      <TD width="15%">&nbsp;</TD>
      <TD width="15%">&nbsp;</TD></TR>
    <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD></TR>
    <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD></TR>
    <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
  <TD>&nbsp;</TD></TR></TABLE><BR><BR>
  <HR color=gray noShade SIZE=3>
  <!-- *************************************************************************** --><!-- MARKER PAGE="sheet: 1; page: 1" --><BR><BR>
  <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
  
    <TR vAlign=top align=left>
      <TD colSpan=2><STRONG><FONT face="Times New Roman, Times, serif"
        size=2>REMARKS:</FONT></STRONG></TD>
      <TD width="5%"><FONT face="Times New Roman, Times, serif"
        size=2>&nbsp;</FONT></TD>
      <TD width="46%"><FONT face="Times New Roman, Times, serif"
        size=2>&nbsp;</FONT></TD></TR>
    <TR vAlign=top align=left>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD></TR>
    <TR vAlign=top align=left>
      <TD width="3%"><FONT face="Times New Roman, Times, serif"
        size=2>&nbsp;</FONT></TD>
      <TD width="46%"><STRONG><FONT face="Times New Roman, Times, serif"
        size=2>INSTRUCTIONS:</FONT></STRONG></TD>
      <TD width="5%"><FONT face="Times New Roman, Times, serif"
        size=2>&nbsp;</FONT></TD>
      <TD width="46%"><STRONG><FONT face="Times New Roman, Times, serif"
        size=2>ATTENTION:</FONT></STRONG></TD></TR>
    <TR vAlign=top align=left>
      <TD width="3%"><FONT face="Times New Roman, Times, serif"
        size=2>&nbsp;</FONT></TD>
      <TD width="46%"><FONT face="Times New Roman, Times, serif" size=2>See the
        definition of &#147;person&#148; in paragraph (a) of Rule 144. Information is to be
        given not only as to the person for whose account the securities are to be
        sold but also as to all other persons included in that definition. In
        addition, information shall be given as to sales by all persons whose
        sales are required by paragraph (e) of Rule 144 to be aggregated with
        sales for the account of the person filing this notice.</FONT></TD>
      <TD width="5%"><FONT face="Times New Roman, Times, serif"
        size=2>&nbsp;</FONT></TD>
      <TD width="46%"><EM><FONT face="Times New Roman, Times, serif" size=2>The
        person for whose account the securities to which this notice relates are
        to be sold hereby represents by signing this notice that he does not know
        any material adverse information in regard to the current and prospective
        operations of the Issuer of the securities to be sold which has not been
        publicly disclosed.</FONT></EM></TD></TR>
    <TR>
      <TD width="3%">&nbsp;</TD>
      <TD width="46%">&nbsp;</TD>
      <TD width="5%">&nbsp;</TD>
      <TD width="46%">&nbsp;</TD></TR>
    <TR>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD>
      <TD>&nbsp;</TD></TR>
    <TR>
      <TD>&nbsp;</TD>
      <TD><font size="2" face="Geneva, Arial, Helvetica, sans-serif">May 11, 2006</font></TD>
      <TD>&nbsp;</TD>
      <TD><font size="2" face="Geneva, Arial, Helvetica, sans-serif">/s/ Bruce
          Wier</font></TD>
    </TR>
    <TR>
      <TD>&nbsp;</TD>
      <TD>
        <HR align=left width="100%" color=#000000 noShade SIZE=1>
      </TD>
      <TD>&nbsp;</TD>
      <TD>
        <HR align=left width="100%" color=#000000 noShade SIZE=1>
      </TD></TR>
    <TR>
      <TD>&nbsp;</TD>
      <TD align=middle><FONT face="Times New Roman, Times, serif" size=2>DATE OF
        NOTICE</FONT></TD>
      <TD>&nbsp;</TD>
      <TD align=middle><FONT face="Times New Roman, Times, serif"
        size=2>(SIGNATURE)</FONT></TD></TR></TABLE><BR>
  <P align=center><FONT face="Times New Roman, Times, serif" size=2><EM>The notice
  shall be signed by the person for whose account the securities are to be sold.
  At least one copy of the notice shall be manually signed. Any copies not
  manually signed shall bear typed or printed signatures.</EM></FONT></P>
  <DIV align=center>
  <TABLE cellSpacing=0 cellPadding=3 width="90%" border=1>
  
    <TR>
      <TD vAlign=center borderColor=#999999 align=middle><STRONG><FONT
        face="Times New Roman, Times, serif" size=2>ATTENTION: Intentional
        misstatements or omission of facts constitute Federal Criminal Violations
        (See 18 U.S.C.
  1001)</FONT></STRONG></TD></TR></TABLE></DIV></BODY></HTML>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "dp02606_144.htm", "secsgml_size_bytes": 34357}]
text: UNITED
        STATES
  SECURITIES AND EXCHANGE
        COMMISSION
  Washington, D.C. 20549
  OMB APPROVAL
  OMB Number:
  3235-0101
  Expires:
  December 31, 2006
  Estimated average burden
        hours
  FORM 144
  per response
  4.47
  NOTICE OF PROPOSED SALE OF
        SECURITIES
  PURSUANT TO RULE 144
        UNDER THE SECURITIES ACT OF 1933
  SEC USE ONLY
  DOCUMENT SEQUENCE
      NO.
  CUSIP NUMBER
  ATTENTION:
  Transmit for filing 3
        copies of this form concurrently with either placing an order with a
        broker to execute sale or executing a sale directly with a market
        maker
  WORK
  LOCATION
  1 (a) NAME OF ISSUER (
  Please type
        or print
  )
  ULTRA CLEAN HOLDINGS, INC.
  (b) IRS IDENT. NO.
  61-1430858
  (c) S.E.C. FILE NO.
  000-50646
  1 (d) ADDRESS OF
        ISSUER                     STREET                                                 CITY                 STATE                ZIP
        CODE
  150                                          Independence
        Drive         Menlo
        Park   CA              94025
  (e) TELEPHONE NO.
  Area Code
  650
  Number
  323-4100
  2 (a) NAME OF PERSON FOR WHOSE ACCOUNT
        THE SECURITIES ARE TO BE SOLD
  Bruce Wier
  (b) IRS IDENT. NO.
  N/A
  (c) RELATIONSHIP TO ISSUER
  Executive officer
  (d)
        ADDRESS    STREET               CITY                        STATE     ZIP
        CODE
  c/o Ultra Clean
  150 Independence        Menlo
        Park      CA      94025
  Drive
  INSTRUCTION: The person filing this notice should contact the
        issuer to obtain the I.R.S. Identification Number and the S.E.C. File
        Number.
  3(a) Title of the Class of Securities
        To Be Sold
  (b) Name and Address of Each Broker
        Through whom the Securities are to be Offered or Each Market Maker who is
        Acquiring the Securities
  SEC USE
  ONLY
  (c) Number of Shares or Other Units To
        Be Sold
  (
  See instr. 3(c)
  )
  (d) Aggregate Market Value
  (
  See
        instr. 3(d)
  )
  (e) Number of Shares or Other Units
        Outstanding
  (
  See instr. 3(e)
  )
  (f) Approximate Date of
        Sale
  (
  See instr. 3(f)
  )
  (MO. DAY YR.)
  (g) Name of Each Securities
        Exchange
  (
  See instr. 3(g)
  )
  Broker-Dealer
  File
    Number
  common
          stock, par value $0.001
  Wells
          Fargo Investments
  60 West Hamilton
  Campbell, CA 95008
  10,000
  $91,200
  18,285,010
  5/11/06
  NASDAQ Stock Market
  INSTRUCTIONS:
  1.
  (a)
  Name of
        issuer
  3.
  (a)
  Title of
        the class of securities to be sold
  (b)
  Issuer's
        I.R.S. Identification Number
  (b)
  Name and
        address of each broker through whom the securities are
  (c)
  Issuer's S.E.C. file
        number, if any
  intended to be
        sold
  (d)
  Issuer's
        address, including zip code
  (c)
  Number of
        shares or other units to be sold (if debt securities,
  (e)
  Issuer's telephone
        number, including area code
  give the aggregate
        face amount)
  (d)
  Aggregate market
        value of the securities to be sold as of a specified date
  2.
  (a)
  Name of
        person for whose account the securities are to be sold
  within 10
        days prior to the filing of this notice
  (b)
  Such
        person's I.R.S. identification number, if such person is an
      entity
  (e)
  Number of shares or other units of the class outstanding, or if
        debt
  (c)
  Such
        person's relationship to the issuer (e.g., officer, director,
  securities
        the face amount thereof outstanding, as shown by
  10% stockholder, or member of immediate family of any of the
        foregoing)
  the most
        recent report or statement published by the issuer
  (d)
  Such
        person's address, including zip code
  (f)
  Approximate date on which the securities are to be
  sold
  (g)
  Name of each securities exchange, if any, on which the
        securities
  are intended to be sold
  Potential persons who are to respond to the collection of information
        contained in this form are not required to respond unless the form displays
        a currently valid OMB control number.
  TABLE I – SECURITIES TO BE
        SOLD
  Furnish the following information with respect to the acquisition
        of the securities to be sold
  and with respect to the payment of all or
        any part of the purchase price or other consideration
      therefor:
  Title of the Class
  Date you Acquired
  Nature of Acquisition
        Transaction
  Name of Person from Whom Acquired
        (
  if gift, also give date donor acquired
  )
  Amount of Securities
  Acquired
  Date of Payment
  Nature of Payment
  common
          stock, par value $0.001
  11/26/02
  Purchase of restricted securities
  Ultra Clean Holdings, Inc.
  53,075
  11/26/02
  Cash
  INSTRUCTIONS:
  If the
        securities were purchased and full payment therefor was not made in cash
        at the time of purchase, explain in the table or in a note thereto the
        nature of the consideration given. If the consideration consisted of any
        note or other obligation, or if payment was made in installments describe
        the arrangement and state when the note or other obligation was discharged
        in full or the last installment paid.
  TABLE II – SECURITIES SOLD DURING THE PAST 3
        MONTHS
  Furnish the following information as to all securities of the
        issuer sold
  during the past 3 months by the person for whose account
      the securities are to be sold.
  Name and Address of Seller
  Title of Securities Sold
  Date of Sale
  Amount of Securities Sold
  Gross Proceeds
  N/A
  N/A
  N/A
  N/A
  N/A
  REMARKS:
  INSTRUCTIONS:
  ATTENTION:
  See the
        definition of "person" in paragraph (a) of Rule 144. Information is to be
        given not only as to the person for whose account the securities are to be
        sold but also as to all other persons included in that definition. In
        addition, information shall be given as to sales by all persons whose
        sales are required by paragraph (e) of Rule 144 to be aggregated with
        sales for the account of the person filing this notice.
  The
        person for whose account the securities to which this notice relates are
        to be sold hereby represents by signing this notice that he does not know
        any material adverse information in regard to the current and prospective
        operations of the Issuer of the securities to be sold which has not been
        publicly disclosed.
  May 11, 2006
  /s/ Bruce
          Wier
  DATE OF
        NOTICE
  (SIGNATURE)
  The notice
  shall be signed by the person for whose account the securities are to be sold.
  At least one copy of the notice shall be manually signed. Any copies not
  manually signed shall bear typed or printed signatures.
  ATTENTION: Intentional
        misstatements or omission of facts constitute Federal Criminal Violations
        (See 18 U.S.C.
  1001)