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<PERIOD>20091029
<ITEMS>7.01
<FILING-DATE>20091029
<DATE-OF-FILING-DATE-CHANGE>20091029
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>CADENCE DESIGN SYSTEMS INC
<CIK>0000813672
<ASSIGNED-SIC>7372
<IRS-NUMBER>770148231
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1229
</COMPANY-DATA>
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<FORM-TYPE>8-K
<ACT>34
<FILE-NUMBER>001-10606
<FILM-NUMBER>091143040
</FILING-VALUES>
<BUSINESS-ADDRESS>
<STREET1>2655 SEELY ROAD BLDG 5
<CITY>SAN JOSE
<STATE>CA
<ZIP>95134
<PHONE>4089431234
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>555 RIVER OAKS PARKWAY
<CITY>SAN JOSE
<STATE>CA
<ZIP>95134
</MAIL-ADDRESS>
<FORMER-COMPANY>
<FORMER-CONFORMED-NAME>ECAD INC /DE/
<DATE-CHANGED>19880609
</FORMER-COMPANY>
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<DOCUMENT>
<TYPE>8-K
<SEQUENCE>1
<FILENAME>f53878e8vk.htm
<DESCRIPTION>FORM 8-K
<TEXT>
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<DIV style="width: 100%; border-bottom: 2pt solid black; font-size: 1pt">&nbsp;</DIV>
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<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: 18pt; margin-top: 12pt"><B>FORM 8-K</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B>CURRENT REPORT<BR>
Pursuant to Section&nbsp;13 or 15(d) of<BR>
the Securities Exchange Act of 1934</B>
</DIV>


<DIV align="center" style="font-size: 12pt; margin-top: 12pt"><B><DIV align="center"><DIV style="font-size: 3pt; margin-top: 16pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></B>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>Date of report (Date of earliest event reported): October&nbsp;29, 2009</B></DIV>

<DIV align="center" style="font-size: 24pt; margin-top: 12pt"><B>CADENCE DESIGN SYSTEMS, 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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    <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>
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<TR valign="bottom">
    <TD align="center" valign="top"><B>Delaware</B><BR>
(State or Other Jurisdiction <BR>
of Incorporation)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>000-15867</B><BR>
(Commission File Number)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>77-0148231</B><BR>
(I.R.S. Employer<BR>
Identification No.)</TD>
</TR>
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</TABLE>
</DIV>

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
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    <TD width="47%">&nbsp;</TD>
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    <TD align="center" valign="top"><B>2655 Seely Avenue, Building 5<BR>
San Jose, California</B><BR>
(Address of Principal Executive Offices)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="BOTTOM"><B>95134</B><BR>
(Zip Code)</TD>
</TR>
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</TABLE>
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>(408)&nbsp;943-1234</B><BR>
(Registrant&#146;s telephone number, including area code)</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the
filing obligation of the registrant under any of the following provisions:
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt"><FONT face="Wingdings">&#111;</FONT>&nbsp;&nbsp;&nbsp;Written communications pursuant to Rule&nbsp;425 under the Securities Act (17 CFR 230.425)
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt"><FONT face="Wingdings">&#111;</FONT>&nbsp;&nbsp;&nbsp;Soliciting material pursuant to Rule&nbsp;14a-12 under the Exchange Act (17 CFR 240.14a-12)
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt"><FONT face="Wingdings">&#111;</FONT>&nbsp;&nbsp;&nbsp;Pre-commencement communications pursuant to Rule&nbsp;14d-2(b) under the Exchange Act (17 CFR
240.14d-2(b))
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt"><FONT face="Wingdings">&#111;</FONT>&nbsp;&nbsp;&nbsp;Pre-commencement communications pursuant to Rule&nbsp;13e-4(c) under the Exchange Act (17 CFR
240.13e-4(c))
</DIV>


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<!-- link2 "Item&nbsp;7.01. Regulation&nbsp;FD Disclosure." -->
<DIV align="left"><A NAME="000"></A></DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt"><B>Item&nbsp;7.01. Regulation&nbsp;FD Disclosure.</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;On October&nbsp;28, 2009, after the third quarter earnings call of Cadence Design Systems, Inc.
(the &#147;Company&#148;), the Company&#146;s Chief Financial Officer, in response to a question from an analyst,
inadvertently disclosed that the Company&#146;s projected bookings in fiscal 2010 could be $800&nbsp;million
or more. The Company believes that this statement was premature, because the Company has not yet
completed its analysis to project its bookings in 2010. The Company expects to complete this
analysis and provide guidance for its 2010 bookings when it releases its operating results for
fiscal 2009.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This Current Report on Form 8-K is being furnished solely to satisfy the requirements of
Regulation&nbsp;FD in light of the inadvertent disclosure. The information under Item&nbsp;7.01 in this
Current Report on Form 8-K will not be incorporated by reference into any registration statement or
other document filed by the Company under the Securities Act of 1933, as amended, unless
specifically identified therein as being incorporated by reference.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 6pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The statements contained above regarding the Company&#146;s expected 2010 bookings include
forward-looking statements based on current expectations or beliefs, as well as a number of
preliminary assumptions about future events that are subject to factors and uncertainties that
could cause actual results to differ materially from those described in the forward-looking
statements. Readers are cautioned not to put undue reliance on these forward-looking statements,
which are not a guarantee of future performance and are subject to a number of risks, uncertainties
and other factors, many of which are outside the Company&#146;s control, including, among others: (i)
the Company&#146;s ability to compete successfully in the electronic design automation product and the
commercial electronic design and methodology services industries; (ii)&nbsp;the Company&#146;s ability to
successfully complete and realize the expected benefits of the previously announced restructurings
without significant unexpected costs or delays, and the success of the Company&#146;s other efforts to
improve operational efficiency and growth; (iii)&nbsp;the mix of products and services sold and the
timing of significant orders for the Company&#146;s products, and its shift to a ratable license
structure, which may result in changes in the mix of license types; (iv)&nbsp;change in customer
demands, including the possibility that the previously announced restructurings and other efforts
to improve operational efficiency could result in delays in customers&#146; purchases of products and
services; (v)&nbsp;economic and industry conditions in regions in which the Company does business; (vi)
fluctuations in rates of exchange between the U.S. dollar and the currencies of other countries in
which the Company does business; (vii)&nbsp;capital expenditure requirements, legislative or regulatory
requirements, interest rates and the Company&#146;s ability to access capital and debt markets; (viii)
the acquisition of other companies or technologies or the failure to successfully integrate and
operate these companies or technologies the Company acquires; (ix)&nbsp;the effects of the previously
announced restructurings and other efforts to improve operational efficiency on the Company&#146;s
business, including its strategic and customer relationships, ability to retain key employees and
stock prices; and (x)&nbsp;the effects of any litigation or other proceedings to which the Company is or
may become a party.
</DIV>

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<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 Exchange Act of 1934, the registrant has duly
caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">Dated: October&nbsp;29, 2009
</DIV>


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<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left">CADENCE DESIGN SYSTEMS, INC.<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/ James J. Cowie
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">James J. Cowie&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Senior Vice President, General Counsel and Secretary&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
<TR>
    <TD colspan="5">&nbsp;</TD>
</TR>
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