<HTML>
<HEAD>
<TITLE>sv8</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
<!-- PAGEBREAK -->
<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 NOVEMBER 24, 2010
</DIV>


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


<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt; margin-top: 6pt">&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: 12pt">
<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: 12pt; margin-top: 12pt"><B>REGISTRATION STATEMENT<BR>
UNDER<BR>
THE SECURITIES ACT OF 1933</B>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt">
<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: 20pt; margin-top: 12pt"><B>CABOT MICROELECTRONICS CORPORATION</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%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="48%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="48%">&nbsp;</TD>
</TR>
<TR></TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top">DELAWARE
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">36-4324765</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">(I.R.S. Employer Identification <BR>
Number)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</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="47%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="47%">&nbsp;</TD>
</TR>
<TR></TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top">870 NORTH COMMONS DRIVE <BR>
AURORA, ILLINOIS
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="bottom">60504</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">(Address of Principal Executive Offices)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">(Zip Code)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt">
CABOT MICROELECTRONICS CORPORATION<BR>

2007 EMPLOYEE STOCK PURCHASE PLAN<BR>

(Full title of the plan)</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 12pt">
WILLIAM S. JOHNSON<BR>

VICE PRESIDENT AND CHIEF FINANCIAL OFFICER<BR>

CABOT MICROELECTRONICS CORPORATION<BR>

870 NORTH COMMONS DRIVE<BR>

AURORA, ILLINOIS 60504<BR>

(Name and address, of agent for service)</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 12pt">
(630)&nbsp;375-6631<BR>

(Telephone number, including area code, of agent for service)</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a
non-accelerated filer, or a smaller reporting company. See definition of &#147;large accelerated
filer,&#148; &#147;accelerated filer&#148; and &#147;smaller reporting company&#148; in Rule&nbsp;12b-2 of the Exchange Act.
(Check one):</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="22%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="22%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="22%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="22%">&nbsp;</TD>
</TR>
<TR></TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><FONT style="white-space: nowrap">Large accelerated filer <FONT style="font-family: Wingdings">&#254;</FONT></FONT>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><FONT style="white-space: nowrap">Accelerated filer <FONT style="font-family: Wingdings">&#111;</FONT></FONT>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><FONT style="white-space: nowrap">Non-accelerated filer <FONT style="font-family: Wingdings">&#111;</FONT></FONT>
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><FONT style="white-space: nowrap">Smaller reporting company <FONT style="font-family: Wingdings">&#111;</FONT></FONT></TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top">&nbsp;
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><FONT style="white-space: nowrap">(Do not check if a smaller reporting company)</FONT></TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt">
<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="45%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD><!-- VRule -->
    <TD width="1%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD><!-- VRule -->
    <TD width="1%">&nbsp;</TD>
    <TD width="17%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD><!-- VRule -->
    <TD width="1%">&nbsp;</TD>
    <TD width="8%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD><!-- VRule -->
    <TD width="1%">&nbsp;</TD>
    <TD width="17%">&nbsp;</TD>

    <TD width="1%">&nbsp;</TD>
</TR><TR style="font-size: 1px" valign="bottom">
    <TD nowrap align="left" colspan="15" 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 style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Proposed Maximum</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center"></TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
<TD>&nbsp;</TD>
    <TD nowrap align="center">Title of Securities to</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Amount to be</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Proposed Maximum</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Aggregate Offering</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Amount of </TD>
    <TD width="1%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%">&nbsp;</TD>
    <TD nowrap align="center">be Registered)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Registered (1)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Offering Price per Share (2)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Price (2)</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Registration Fee (3)</TD>
    <TD>&nbsp;</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<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 par value $.001 per
share</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 align="center" valign="bottom" style="border-top: 2px solid #000000">500,000</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="center" valign="bottom" style="border-top: 2px solid #000000">             $39.445</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="center" valign="bottom" style="border-top: 2px solid #000000">                 $19,722,500             </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="center" valign="bottom" style="border-top: 2px solid #000000">$1,406.21</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="15" style="border-top: 3px double #000000">&nbsp;</TD>
</TR>

<!-- End Table Body -->
</TABLE>
</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="3%" style="background: transparent">&nbsp;</TD>
    <TD width="2%" nowrap align="left">(1)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Plus such additional number of shares as may be required in the event of a stock
dividend, stock split, recapitalization or other similar event in accordance with Rule&nbsp;416
of the Securities Act of 1933, as amended (the &#147;Securities 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="3%" style="background: transparent">&nbsp;</TD>
    <TD width="2%" nowrap align="left">(2)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>Estimated solely for the purpose of determining the registration fee pursuant to Rules
457(c) and 457(h) of the Securities Act and based on the average of the high and low prices
of a share of our common stock, $.001 par value (&#147;Common Stock&#148;) as reported on the NASDAQ
Global Select Market on November&nbsp;18, 2010.</TD>
</TR>

<TR>
    <TD style="font-size: 6pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="3%" style="background: transparent">&nbsp;</TD>
    <TD width="2%" nowrap align="left">(3)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>This Registration Statement registers additional shares of our Common Stock issuable
pursuant to the same employee benefit plan for which Registration Statement No.&nbsp;333-34270
is currently effective. Accordingly, pursuant to Instruction E on Form S-8, the
registration fee is being paid with respect to the additional securities only.</TD>
</TR>

</TABLE>
</DIV>

<DIV style="width: 100%; border-bottom: 1pt solid black; margin-top: 10pt; font-size: 1pt">&nbsp;</DIV>
<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>





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

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

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

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


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;We filed Registration Statement No.&nbsp;333-34270 with the Securities and Exchange Commission (the
&#147;SEC&#148;) on April&nbsp;7, 2000 to register 475,000 shares of our Common Stock issuable pursuant to our
Employee Stock Purchase Plan (now known as the 2007 Employee Stock Purchase Plan (as amended, the
&#147;Plan&#148;)). Registration Statement No.&nbsp;333-34270 is still effective. We are filing this Registration
Statement to register 500,000 additional shares of Common Stock issuable pursuant to the Plan.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to General Instruction E of Form S-8, the contents of Registration Statement No.
333-34270 are incorporated herein by reference, to the extent not amended hereby.
</DIV>

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


<DIV align="center" style="font-size: 10pt; margin-top: 6pt">INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
</DIV>


<DIV align="left" style="margin-top: 12pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left">ITEM 3.</TD>
    <TD>&nbsp;</TD>
    <TD>INCORPORATION OF DOCUMENTS BY REFERENCE</TD>
</TR>
</TABLE>
</DIV>
<DIV align="left" style="font-size: 10pt; margin-top: 6pt">We have filed with the SEC and hereby incorporate by reference the following documents:</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a)&nbsp;Our Registration Statement on Form S-8 filed on April&nbsp;7, 2000 (File No.
333-34270);
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b)&nbsp;Our Annual Report on Form 10-K for the fiscal year ended September&nbsp;30, 2010 filed with
the SEC on November&nbsp;23, 2010, which includes our audited financial statements for the fiscal year
ended September&nbsp;30, 2010 (File No.&nbsp;000- 30205); and
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c)&nbsp;The description of our Common Stock contained in our Registration Statement on Form 8-A
filed with the SEC on April&nbsp;3, 2000 (File No.&nbsp;000-30205).
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In addition, all documents subsequently filed pursuant to Sections&nbsp;13(a), 13(c), 14 and 15(d)
of the Exchange Act, prior to the filing of a post-effective amendment which indicates that all
shares of our Common Stock subject to our 2007 Employee Stock Purchase Plan have been sold or which
deregisters all of such shares 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.
</DIV>

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

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

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

<DIV align="left" style="margin-top: 12pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt; background: transparent; color: #000000">
<TR>
    <TD width="3%"></TD>
    <TD width="1%"></TD>
    <TD></TD>
</TR>
<TR valign="top">
    <TD nowrap align="left">ITEM 8.</TD>
    <TD>&nbsp;</TD>
    <TD>EXHIBITS</TD>
</TR>
</TABLE>
</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="7%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="90%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">EXHIBIT NO.</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">DESCRIPTION OF EXHIBIT</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amended and Restated By-Laws of Cabot Microelectronics Corporation filed as an exhibit to, and
incorporated by reference to Exhibit 3.2 to the Registrant&#146;s Current Report on Form&nbsp;8-K (No.
000-30205) filed with the Commission on September&nbsp;24, 2008.</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">4.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Amended and Restated Certificate of Incorporation of Cabot Microelectronics Corporation
(incorporated by reference to Exhibit&nbsp;3.3 to the Registrant&#146;s Registration Statement on Form&nbsp;S-1
(No.&nbsp;333-95093) filed with the Commission on March&nbsp;27, 2000.)</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">4.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Cabot Microelectronics Corporation Common Stock Certificate (incorporated by reference
to Exhibit&nbsp;4.1 to the Registrant&#146;s Registration Statement on Form&nbsp;S-1 (No.&nbsp;333-95093) filed with
the Commission on April&nbsp;3, 2000.)</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">4.4
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Cabot Microelectronics Corporation 2007 Employee Stock Purchase Plan, as Amended and Restated
January&nbsp;1, 2010 (incorporated by reference to Exhibit&nbsp;10.15 to the Registrant&#146;s Quarterly Report on
Form&nbsp;10-Q (No.&nbsp;000-30205) filed with the Commission on February&nbsp;8, 2010).</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">5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Winston &#038; Strawn LLP.</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 Winston &#038; Strawn LLP (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">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of PricewaterhouseCoopers LLP (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">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney.</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


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

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

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


<DIV align="center" style="font-size: 10pt; margin-top: 18pt">SIGNATURES
</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, 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 Aurora, State of Illinois, on November&nbsp;24, 2010.
</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">CABOT MICROELECTRONICS CORPORATION<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD>&nbsp;</TD>
    <TD align="left">By:&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/ William S. Johnson
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD align="left">&nbsp;</TD>
    <TD colspan="2" align="left">  William S. Johnson&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD align="left">&nbsp;</TD>
    <TD colspan="2" align="left">Vice President and Chief Financial Officer&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
</TABLE>


<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, this Registration Statement has been signed below by the following persons 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="3%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="30%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left">SIGNATURE</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">TITLE</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">DATE</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>
    <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">/s/ William P. Noglows
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
William P. Noglows
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Chairman of the Board,<br>
President and Chief<br>
Executive Officer<br>
(Principal Executive Officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">November&nbsp;24, 2010</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>
    <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">/s/ William S. Johnson
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
William S. Johnson
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Vice President and Chief<br>
Financial Officer (Principal
Financial Officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">November&nbsp;24, 2010</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>
    <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">/s/ Thomas S. Roman
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Thomas S. Roman
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Corporate Controller <br>
(Principal Accounting Officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">November&nbsp;24, 2010</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>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">November&nbsp;24, 2010</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Robert J. Birgeneau
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</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>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">November&nbsp;24, 2010</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
John P. Frazee, Jr.
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</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>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">November&nbsp;24, 2010</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
H. Laurance Fuller
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</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>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">November 24, 2010</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Barbara A. Klein
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</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>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">November&nbsp;24, 2010</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Edward J. Mooney
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</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>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">November&nbsp;24, 2010</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Steven V. Wilkinson
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</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>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD align="center" valign="top"><DIV style="margin-left:0px; text-indent:-0px">*
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">November&nbsp;24, 2010</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px"><DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
Bailing Xia
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="0%"></TD>
    <TD width="1%"></TD>
    <TD width="1%"></TD>
    <TD width="35%"></TD>
    <TD width="63%"></TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">
&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/ H. Carol Bernstein
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">H. Carol Bernstein&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">As Attorney-in-fact&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>

</TABLE>

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

<!-- PAGEBREAK -->
<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

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



<DIV align="center" style="font-size: 10pt; margin-top: 18pt">INDEX TO EXHIBITS
</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="5%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="93%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left">EXHIBIT</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">NO.</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">DESCRIPTION OF EXHIBIT</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Amended and Restated By-Laws of Cabot Microelectronics Corporation filed as an exhibit to, and
incorporated by reference to Exhibit 3.2 to the Registrant&#146;s Current Report on Form&nbsp;8-K (No.
000-30205) filed with the Commission on September&nbsp;24, 2008.</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">4.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Amended and Restated Certificate of Incorporation of Cabot Microelectronics Corporation
(incorporated by reference to Exhibit&nbsp;3.3 to the Registrant&#146;s Registration Statement on Form&nbsp;S-1
(No.&nbsp;333-95093) filed with the Commission on March&nbsp;27, 2000).</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">4.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Form of Cabot Microelectronics Corporation Common Stock Certificate (incorporated by reference
to Exhibit&nbsp;4.1 to the Registrant&#146;s Registration Statement on Form&nbsp;S-1 (No.&nbsp;333-95093) filed with
the Commission on April&nbsp;3, 2000).</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">4.4
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Cabot Microelectronics Corporation 2007 Employee Stock Purchase Plan, as Amended and Restated
January&nbsp;1, 2010 (incorporated by reference to Exhibit&nbsp;10.15 to the Registrant&#146;s Quarterly Report on
Form&nbsp;10-Q (No.&nbsp;000-30205) filed with the Commission on February&nbsp;8, 2010).</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">5.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Opinion of Winston &#038; Strawn LLP.</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 Winston &#038; Strawn LLP (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">23.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of PricewaterhouseCoopers LLP (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">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney.</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


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

</BODY>
</HTML>
[{"type": "S-8", "sequence": "1", "filename": "c61530sv8.htm", "description": "FORM S-8", "secsgml_size_bytes": 38052}]
{"company-data": {"conformed-name": "CABOT MICROELECTRONICS CORP", "cik": "0001102934", "assigned-sic": "3674", "irs-number": "364324765", "state-of-incorporation": "DE", "fiscal-year-end": "0930"}, "filing-values": {"form-type": "S-8", "act": "33", "file-number": "333-170810", "film-number": "101214014"}, "business-address": {"street1": "870 NORTH COMMONS DRIVE", "city": "AURORA", "state": "IL", "zip": "60504", "phone": "6303755461"}, "mail-address": {"street1": "870 N COMMONS DR", "city": "AURORA", "state": "IL", "zip": "60504"}}
sv8
AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 24, 2010
Registration No. 333-
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933
CABOT MICROELECTRONICS CORPORATION
(Exact name of registrant as specified in its charter)
DELAWARE
36-4324765
(State or other jurisdiction
of incorporation or organization)
(I.R.S. Employer Identification
Number)
870 NORTH COMMONS DRIVE
AURORA, ILLINOIS
60504
(Address of Principal Executive Offices)
(Zip Code)
CABOT MICROELECTRONICS CORPORATION
2007 EMPLOYEE STOCK PURCHASE PLAN
(Full title of the plan)
WILLIAM S. JOHNSON
VICE PRESIDENT AND CHIEF FINANCIAL OFFICER
CABOT MICROELECTRONICS CORPORATION
870 NORTH COMMONS DRIVE
AURORA, ILLINOIS 60504
(Name and address, of agent for service)
(630) 375-6631
(Telephone number, including area code, of agent for service)
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a
non-accelerated filer, or a smaller reporting company. See definition of "large accelerated
filer," "accelerated filer" and "smaller reporting company" in Rule 12b-2 of the Exchange Act.
(Check one):
Large accelerated filer
þ
Accelerated filer
o
Non-accelerated filer
o
Smaller reporting company
o
(Do not check if a smaller reporting company)
CALCULATION OF REGISTRATION FEE
Proposed Maximum
Title of Securities to
Amount to be
Proposed Maximum
Aggregate Offering
Amount of
be Registered)
Registered (1)
Offering Price per Share (2)
Price (2)
Registration Fee (3)
Common Stock par value $.001 per
share
500,000
$39.445
$19,722,500
$1,406.21
(1)
Plus such additional number of shares as may be required in the event of a stock
dividend, stock split, recapitalization or other similar event in accordance with Rule 416
of the Securities Act of 1933, as amended (the "Securities Act").
(2)
Estimated solely for the purpose of determining the registration fee pursuant to Rules
457(c) and 457(h) of the Securities Act and based on the average of the high and low prices
of a share of our common stock, $.001 par value ("Common Stock") as reported on the NASDAQ
Global Select Market on November 18, 2010.
(3)
This Registration Statement registers additional shares of our Common Stock issuable
pursuant to the same employee benefit plan for which Registration Statement No. 333-34270
is currently effective. Accordingly, pursuant to Instruction E on Form S-8, the
registration fee is being paid with respect to the additional securities only.
EXPLANATORY NOTE
We filed Registration Statement No. 333-34270 with the Securities and Exchange Commission (the
"SEC") on April 7, 2000 to register 475,000 shares of our Common Stock issuable pursuant to our
Employee Stock Purchase Plan (now known as the 2007 Employee Stock Purchase Plan (as amended, the
"Plan")). Registration Statement No. 333-34270 is still effective. We are filing this Registration
Statement to register 500,000 additional shares of Common Stock issuable pursuant to the Plan.
Pursuant to General Instruction E of Form S-8, the contents of Registration Statement No.
333-34270 are incorporated herein by reference, to the extent not amended hereby.
PART II
INFORMATION REQUIRED IN THE REGISTRATION STATEMENT
ITEM 3.
INCORPORATION OF DOCUMENTS BY REFERENCE
We have filed with the SEC and hereby incorporate by reference the following documents:
(a) Our Registration Statement on Form S-8 filed on April 7, 2000 (File No.
333-34270);
(b) Our Annual Report on Form 10-K for the fiscal year ended September 30, 2010 filed with
the SEC on November 23, 2010, which includes our audited financial statements for the fiscal year
ended September 30, 2010 (File No. 000- 30205); and
(c) The description of our Common Stock contained in our Registration Statement on Form 8-A
filed with the SEC on April 3, 2000 (File No. 000-30205).
In addition, all documents subsequently filed pursuant to Sections 13(a), 13(c), 14 and 15(d)
of the Exchange Act, prior to the filing of a post-effective amendment which indicates that all
shares of our Common Stock subject to our 2007 Employee Stock Purchase Plan have been sold or which
deregisters all of such shares 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.
ITEM 8.
EXHIBITS
EXHIBIT NO.
DESCRIPTION OF EXHIBIT
4.1
Amended and Restated By-Laws of Cabot Microelectronics Corporation filed as an exhibit to, and
incorporated by reference to Exhibit 3.2 to the Registrant's Current Report on Form 8-K (No.
000-30205) filed with the Commission on September 24, 2008.
4.2
Form of Amended and Restated Certificate of Incorporation of Cabot Microelectronics Corporation
(incorporated by reference to Exhibit 3.3 to the Registrant's Registration Statement on Form S-1
(No. 333-95093) filed with the Commission on March 27, 2000.)
4.3
Form of Cabot Microelectronics Corporation Common Stock Certificate (incorporated by reference
to Exhibit 4.1 to the Registrant's Registration Statement on Form S-1 (No. 333-95093) filed with
the Commission on April 3, 2000.)
4.4
Cabot Microelectronics Corporation 2007 Employee Stock Purchase Plan, as Amended and Restated
January 1, 2010 (incorporated by reference to Exhibit 10.15 to the Registrant's Quarterly Report on
Form 10-Q (No. 000-30205) filed with the Commission on February 8, 2010).
5.1
Opinion of Winston & Strawn LLP.
23.1
Consent of Winston & Strawn LLP (included in Exhibit 5.1).
23.2
Consent of PricewaterhouseCoopers LLP (Independent Registered Public Accounting Firm).
24.1
Power of Attorney.
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, 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 Aurora, State of Illinois, on November 24, 2010.
CABOT MICROELECTRONICS CORPORATION
By:
/s/ William S. Johnson
William S. Johnson
Vice President and Chief Financial Officer
Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.
SIGNATURE
TITLE
DATE
/s/ William P. Noglows
William P. Noglows
Chairman of the Board,
President and Chief
Executive Officer
(Principal Executive Officer)
November 24, 2010
/s/ William S. Johnson
William S. Johnson
Vice President and Chief
Financial Officer (Principal
Financial Officer)
November 24, 2010
/s/ Thomas S. Roman
Thomas S. Roman
Corporate Controller
(Principal Accounting Officer)
November 24, 2010
*
Director
November 24, 2010
Robert J. Birgeneau
*
Director
November 24, 2010
John P. Frazee, Jr.
*
Director
November 24, 2010
H. Laurance Fuller
*
Director
November 24, 2010
Barbara A. Klein
*
Director
November 24, 2010
Edward J. Mooney
*
Director
November 24, 2010
Steven V. Wilkinson
*
Director
November 24, 2010
Bailing Xia
*By:
/s/ H. Carol Bernstein
H. Carol Bernstein
As Attorney-in-fact
INDEX TO EXHIBITS
EXHIBIT
NO.
DESCRIPTION OF EXHIBIT
4.1
Amended and Restated By-Laws of Cabot Microelectronics Corporation filed as an exhibit to, and
incorporated by reference to Exhibit 3.2 to the Registrant's Current Report on Form 8-K (No.
000-30205) filed with the Commission on September 24, 2008.
4.2
Form of Amended and Restated Certificate of Incorporation of Cabot Microelectronics Corporation
(incorporated by reference to Exhibit 3.3 to the Registrant's Registration Statement on Form S-1
(No. 333-95093) filed with the Commission on March 27, 2000).
4.3
Form of Cabot Microelectronics Corporation Common Stock Certificate (incorporated by reference
to Exhibit 4.1 to the Registrant's Registration Statement on Form S-1 (No. 333-95093) filed with
the Commission on April 3, 2000).
4.4
Cabot Microelectronics Corporation 2007 Employee Stock Purchase Plan, as Amended and Restated
January 1, 2010 (incorporated by reference to Exhibit 10.15 to the Registrant's Quarterly Report on
Form 10-Q (No. 000-30205) filed with the Commission on February 8, 2010).
5.1
Opinion of Winston & Strawn LLP.
23.1
Consent of Winston & Strawn LLP (included in Exhibit 5.1).
23.2
Consent of PricewaterhouseCoopers LLP (Independent Registered Public Accounting Firm).
24.1
Power of Attorney.