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



<DIV align="center" style="font-size: 10pt; margin-top: 12pt"><B>As
filed with the Securities and Exchange Commission on March&nbsp;28, 2006</B></DIV>


<DIV align="right" style="font-size: 10pt; margin-top: 3pt; margin-right: 5%"><B>Registration No.&nbsp;333-</B>
</DIV>


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




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

<DIV align="center" style="font-size: 12pt"><B>Washington, D.C. 20549<BR>
<DIV align="center"><DIV style="font-size: 3pt; margin-top: 6pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></B>
</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<BR>
<DIV align="center"><DIV style="font-size: 3pt; margin-top: 6pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV></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%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="48%">&nbsp;</TD>
    <TD width="3%">&nbsp;</TD>
    <TD width="48%">&nbsp;</TD>
</TR>
<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD align="center" valign="top"><B>Delaware</B><BR>
(State or Other Jurisdiction of Incorporation or Organization)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top"><B>77-0148231</B><BR>
(I.R.S. Employer Identification No.)</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 6pt"><B>2655 Seely Avenue, Building 5<BR>
San Jose, California 95134</B><BR>
(Address of Principal Executive Offices) (Zip Code)<BR>
<DIV align="center"><DIV style="font-size: 3pt; margin-top: 6pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 6pt"><B>Options Assumed by Cadence Design Systems, Inc.<BR>
originally granted under the<BR>
Praesagus Inc. 2001 Employee, Director and Consultant Stock Option Plan<BR>
Praesagus Inc. 2005 Equity Incentive Plan<BR>
(together, the &#147;Praesagus Plans&#148;)</B><BR>
(Full title of the Plan)
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 6pt"><DIV align="center"><DIV style="font-size: 3pt; margin-top: 6pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 6pt"><B>R.L. Smith McKeithen, Esq.<BR>
Senior Vice President, General Counsel and Secretary<BR>
Cadence Design Systems, Inc.<BR>
2655 Seely Avenue, Building 5, San Jose, California 95134</B>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 0pt">(Name and Address of Agent for Service)<BR>
<B>(408)&nbsp;943-1234</B>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 0pt">(Telephone Number, Including Area Code, of Agent For Service)<BR>
<DIV align="center"><DIV style="font-size: 3pt; margin-top: 6pt; width: 26%; border-top: 1px solid #000000">&nbsp;</DIV></DIV>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 6pt"><B>Copies to:<BR>
Gregory J. Conklin, Esq.<BR>
Gibson, Dunn &#038; Crutcher LLP<BR>
One Montgomery Street,
31</B><SUP style="font-size: 85%; vertical-align: text-top"><B>st</B></SUP><B> Floor<BR>
San Francisco, California 94104<BR>
(415)&nbsp;393-8200</B>
</DIV>


<DIV align="center" style="font-size: 10pt; margin-top: 6pt"><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="36%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="19%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="6%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="13%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD><!-- VRule -->
    <TD width="2%">&nbsp;</TD>
    <TD width="8%">&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 solid #000000">&nbsp;</TD>
</TR>

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

    <TD nowrap align="left">Title of Securities</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 Offering Price Per</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%" style="border-right: 3px solid #000000">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">    <TD width="1%" style="border-left: 3px solid #000000">&nbsp;</TD>

    <TD nowrap align="left">to be Registered</TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Amount to be Registered <SUP style="font-size: 85%; vertical-align: text-top">(1)</SUP></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Share <SUP style="font-size: 85%; vertical-align: text-top">(2)</SUP></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Price<SUP style="font-size: 85%; vertical-align: text-top">(2)</SUP></TD>
    <TD style="border-right: 2px solid #000000">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center">Registration Fee<SUP style="font-size: 85%; vertical-align: text-top">(2)</SUP></TD>
    <TD width="1%" style="border-right: 3px solid #000000">&nbsp;</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom">
    <TD width="1%" style="border-left: 3px solid #000000; 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 $0.01 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">305,748 shares</TD>
    <TD style="border-right: 2px solid #000000; border-top: 2px solid #000000">&nbsp;</TD>
    <TD style="border-top: 2px solid #000000">&nbsp;</TD>
    <TD align="center" valign="bottom" style="border-top: 2px solid #000000">$18.02</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">$5,509,579</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">$589.52</TD>
    <TD width="1%" style="border-right: 3px solid #000000; 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 solid #000000">&nbsp;</TD>
</TR>

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


<DIV align="left">
<DIV style="font-size: 3pt; margin-top: 16pt; width: 18%; border-top: 0px solid #000000">&nbsp;</DIV>
</DIV>

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

<TR valign="top">
    <TD nowrap align="left">(1)</TD>
    <TD>&nbsp;</TD>
    <TD>This Registration Statement shall also cover any additional shares of
Common Stock which become issuable under the Praesagus Plans by reason of any
stock dividend, stock split, recapitalization or other similar transaction
effected without the receipt of consideration which results in an increase in
the number of the outstanding shares of Cadence Design Systems, Inc. Common
Stock.</TD>
</TR>

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

<TR valign="top">
    <TD nowrap align="left">(2)</TD>
    <TD>&nbsp;</TD>
    <TD>Calculated solely for purposes of this offering under Rule 457(h) of the
Securities Act of 1933, as amended, on the basis of the maximum offering price
per share that such options may be exercised.</TD>
</TR>

</TABLE>



<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">&nbsp;
</DIV>

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




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

<P><CENTER>
<TABLE border="0" width="90%" cellpadding="0" cellspacing="0">
<TR>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="3%"></TD>
	<TD width="76%"></TD>
</TR>
<TR><TD colspan="9"><A HREF="#000">PART I</A></TD></TR>
<TR><TD colspan="9"><A HREF="#001">PART II</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#002">Item&nbsp;3. <U>Incorporation of Documents by Reference</U></A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#003">Item&nbsp;4. <U>Description of Securities</U></A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#004">Item&nbsp;5. <U>Interests of Named Experts and Counsel</U></A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#005">Item&nbsp;6. <U>Indemnification of Directors and Officers</U></A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#006">Item&nbsp;7. <U>Exemption from Registration Claimed</U></A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#007">Item&nbsp;8. Exhibits</A></TD></TR>
<TR><TD></TD><TD colspan="8"><A HREF="#008">Item&nbsp;9. <U>Undertakings</U></A></TD></TR>
<TR><TD colspan="9"><A HREF="#009">SIGNATURES</A></TD></TR>
<TR><TD colspan="9"><A HREF="#010">POWER OF ATTORNEY</A></TD></TR>
<TR><TD colspan="9"><A HREF="#011"><U>EXHIBIT INDEX</U></A></TD></TR>
<TR><TD colspan="9"><A HREF="f18967exv5w1.htm">EXHIBIT 5.1</A></TD></TR>
<TR><TD colspan="9"><A HREF="f18967exv23w1.htm">EXHIBIT 23.1</A></TD></TR>
<TR><TD colspan="9"><A HREF="f18967exv99w1.htm">EXHIBIT 99.1</A></TD></TR>
<TR><TD colspan="9"><A HREF="f18967exv99w2.htm">EXHIBIT 99.2</A></TD></TR>
</TABLE>
</CENTER>
<!-- /TOC -->
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<H5 align="left" style="page-break-before:always"><A HREF="#toc">Table of Contents</A></H5><P>




<!-- link1 "PART I" -->
<DIV align="left"><A NAME="000"></A></DIV>

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


<DIV align="center" style="font-size: 10pt; margin-top: 18pt"><B>Information Required in the Section&nbsp;10(a) Prospectus</B>
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the instructions to Form S-8, Part&nbsp;I (Information Required in the Section 10(a)
Prospectus) is not filed as part of this Registration Statement.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The shares of common stock subject to options registered hereunder have been assumed by
Cadence Design Systems, Inc. (the &#147;Registrant&#148;) pursuant to an Agreement and Plan of Merger, dated
as of March&nbsp;17, 2006, among the Registrant, Praesagus Inc., a Delaware corporation, and Daffodil
Acquisition, Inc., a Delaware corporation and wholly-owned subsidiary of the Registrant, and Taber
Smith, as stockholder agent. These options were originally granted to directors, employees and
consultants of Praesagus Inc. under the Praesagus Inc. 2001 Employee, Director and Consultant Stock
Option Plan and the Praesagus Inc. 2005 Equity Incentive Plan (together, the &#147;Praesagus Plans&#148;).
</DIV>
<!-- link1 "PART II" -->
<DIV align="left"><A NAME="001"></A></DIV>

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


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

<!-- link2 "Item&nbsp;3. <U>Incorporation of Documents by Reference</U>" -->
<DIV align="left"><A NAME="002"></A></DIV>

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



<DIV align="left" style="font-size: 10pt; margin-top: 12pt; margin-left: 5%">The Registrant hereby incorporates by reference into this Registration Statement the following
documents previously filed with the Securities and Exchange Commission (the &#147;Commission&#148;):
</DIV>

<DIV style="margin-top: 12pt">
<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="8%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(a)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Annual Report on Form 10-K for the fiscal year
ended December&nbsp;31, 2005, including all material incorporated by reference
therein;</TD>
</TR>

<TR>
    <TD style="font-size: 12pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="8%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(b)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Current Reports on Form 8-K filed with the
Commission on February&nbsp;10, 2006, February&nbsp;13, 2006 and March&nbsp;1, 2006;</TD>
</TR>

<TR>
    <TD style="font-size: 12pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="8%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(c)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The Registrant&#146;s Amended Current Report on Form 8-K/A filed
with the Commission on February&nbsp;2, 2006; and</TD>
</TR>

<TR>
    <TD style="font-size: 12pt">&nbsp;</TD>
</TR><TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="8%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">(d)</TD>
    <TD width="1%">&nbsp;</TD>
    <TD>The description of the Registrant&#146;s Common Stock to be offered
hereby contained in the Registrant&#146;s Registration Statement on Form 8-A filed
with the Commission on January&nbsp;12, 2006.</TD>
</TR>

</TABLE>
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;All documents filed pursuant to Section&nbsp;13(a), 13(c), 14 or 15(d) of the Securities Exchange
Act of 1934, as amended, after the date of this Registration Statement and prior to the filing of a
post-effective amendment which indicates that all securities offered hereby have been sold or which
deregisters all securities then remaining unsold shall be deemed to be incorporated by reference
into this Registration Statement and to be a part hereof from the date of filing of such documents.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Any document, and any statement contained in a document, incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded for purposes of this
Registration Statement to the extent that a statement contained herein, or in any other
subsequently filed document that also is incorporated or deemed to be incorporated by reference
herein, modifies or supersedes such document or statement. Any such document or statement so
modified or superseded shall not be deemed, except as so modified or superseded, to constitute a
part of this Registration Statement. Subject to the foregoing, all information appearing in this
Registration Statement is qualified in its entirety by the information appearing in the documents
incorporated by reference.
</DIV>
<!-- link2 "Item&nbsp;4. <U>Description of Securities</U>" -->
<DIV align="left"><A NAME="003"></A></DIV>

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



<DIV align="left" style="font-size: 10pt; margin-top: 12pt; margin-left: 5%">Not Applicable.
</DIV>

<P align="center" style="font-size: 10pt">II-1
</DIV>

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

<DIV style="font-family: 'Times New Roman',Times,serif">
<!-- link2 "Item&nbsp;5. <U>Interests of Named Experts and Counsel</U>" -->
<DIV align="left"><A NAME="004"></A></DIV>

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



<DIV align="left" style="font-size: 10pt; margin-top: 12pt; margin-left: 5%">Not Applicable.
</DIV>
<!-- link2 "Item&nbsp;6. <U>Indemnification of Directors and Officers</U>" -->
<DIV align="left"><A NAME="005"></A></DIV>

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



<DIV align="left" style="font-size: 10pt; margin-top: 12pt; margin-left: 5%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Section&nbsp;145 of the Delaware General Corporation Law permits a corporation to indemnify any of
its directors or officers who was or is a party or is threatened to be made a party to any third
party proceeding by reason of the fact that such person is or was a director or officer of the
corporation against expenses (including attorneys&#146; fees), judgments, fines and amounts paid in
settlement actually and reasonably incurred by such person in connection with such action, suit or
proceeding, if such person acted in good faith and in a manner such person reasonably believed to
be in or not opposed to the best interests of the corporation, and, with respect to any criminal
action or proceeding, had no reasonable cause to believe that such person&#146;s conduct was unlawful.
In a derivative action, i.e., one by or in the right of a corporation, the corporation is permitted
to indemnify any of its directors or officers against expenses (including attorneys&#146; fees) actually
and reasonably incurred by such person in connection with the defense or settlement of such action
or suit if such person acted in good faith and in a manner such person reasonably believed to be in
or not opposed to the best interests of the corporation, except that no indemnification shall be
made if such person shall have been adjudged liable to the corporation, unless and only to the
extent that the court in which such action or suit was brought shall determine upon application
that such person is fairly and reasonably entitled to indemnity for such expenses despite such
adjudication of liability.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt; margin-left: 5%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Article&nbsp;VII of the Registrant&#146;s currently effective Certificate of Incorporation eliminates
the personal liability of its directors for monetary damages for breach of fiduciary duty as a
director, except for liability (i)&nbsp;for any breach of the director&#146;s duty of loyalty to the
corporation or its stockholders, (ii)&nbsp;for acts or omissions not in good faith or which involve
intentional misconduct or a knowing violation of law, (iii)&nbsp;under Section&nbsp;174 of the Delaware
General Corporation Law or (iv)&nbsp;for any transaction from which the director derived an improper
personal benefit. In addition, as permitted by Section&nbsp;145 of the Delaware General Corporation
Law, the Bylaws of the Registrant provide that: (a)&nbsp;the Registrant is required to indemnify its
directors and officers and persons serving in such capacities in other business entities
(including, for example, subsidiaries of the Registrant) at the Registrant&#146;s request (such
directors, officers and other persons are hereinafter referred to collectively as, &#147;Covered
Persons&#148;), to the fullest extent permitted by Delaware law, including those circumstances in which
indemnification would otherwise be discretionary; (b)&nbsp;the Registrant is required to advance
expenses as incurred to such Covered Persons in connection with defending a proceeding; (c)&nbsp;the
indemnitee(s) of the Registrant have the right to bring suit, and to be paid the expenses of
prosecuting such suit, if successful, to enforce the rights to indemnification under the Bylaws or
to advancement of expenses under the Bylaws; (d)&nbsp;the rights conferred in the Bylaws are not
exclusive and the Registrant is authorized to enter into indemnification agreements with such
directors, officers and employees; (e)&nbsp;the Registrant is required to maintain director and officer
liability insurance to the extent reasonably available; and (f)&nbsp;the Registrant may not
retroactively amend the Bylaws indemnification provision in a way that is adverse to such Covered
Persons.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt; margin-left: 5%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The Registrant has entered into indemnity agreements with each of its executive officers and
directors that provide the maximum indemnity allowed to officers and directors by Section&nbsp;145 of
the Delaware General Corporation Law and the Bylaws, as well as certain additional procedural
protections. The Registrant also maintains a limited amount of director and officer insurance.
The indemnification provision in the Bylaws, and the indemnity agreements entered into between the
Registrant and its officers or directors, may be sufficiently broad to permit indemnification of
the Registrant&#146;s officers and directors for liability arising under the Securities Act of 1933, as
amended (the &#147;1933 Act&#148;).
</DIV>
<!-- link2 "Item&nbsp;7. <U>Exemption from Registration Claimed</U>" -->
<DIV align="left"><A NAME="006"></A></DIV>

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



<DIV align="left" style="font-size: 10pt; margin-top: 12pt; margin-left: 5%">Not Applicable.
</DIV>

<P align="center" style="font-size: 10pt">II-2
</DIV>

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

<DIV style="font-family: 'Times New Roman',Times,serif">
<!-- link2 "Item&nbsp;8. Exhibits" -->
<DIV align="left"><A NAME="007"></A></DIV>

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

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="15%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="80%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Exhibit Number</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Exhibit</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Instruments Defining Rights of Stockholders. Reference is made to the Registrant&#146;s
Registration Statement on Form&nbsp;8-A filed with the Commission on January&nbsp;12, 2006 incorporated
by reference pursuant to Item 3(d).</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 and consent of Gibson, Dunn &#038; Crutcher 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 Independent Registered Public Accounting Firm</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Gibson, Dunn &#038; Crutcher LLP (contained in Exhibit&nbsp;5.1).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney (included on the signature pages to this Registration Statement on Form
S-8).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Praesagus Inc. 2001 Employee, Director and Consultant Stock Option Plan</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.2
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Praesagus Inc. 2005 Equity Incentive Plan</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>

<!-- link2 "Item&nbsp;9. <U>Undertakings</U>" -->
<DIV align="left"><A NAME="008"></A></DIV>

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



<DIV align="left" style="font-size: 10pt; margin-top: 12pt; margin-left: 5%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;A. The undersigned Registrant hereby undertakes: (1)&nbsp;to file, during any period in which
offers or sales are being made, a post-effective amendment to this Registration Statement (i)&nbsp;to
include any prospectus required by Section&nbsp;10(a)(3) of the 1933 Act; (ii)&nbsp;to reflect in the
prospectus any facts or events arising after the effective date of this Registration Statement (or
the most recent post-effective amendment thereof) which, individually or in the aggregate,
represent a fundamental change in the information set forth in this Registration Statement; and
(iii)&nbsp;to include any material information with respect to the plan of distribution not previously
disclosed in this Registration Statement or any material change to such information in this
Registration Statement; <I>provided however</I>, that clauses (1)(i) and (1)(ii) shall not apply if the
information required to be included in a post-effective amendment by those clauses is contained in
periodic reports filed with or furnished to the Commission by the Registrant pursuant to Section&nbsp;13
or Section 15(d) of the Securities Exchange Act of 1934, as amended (the &#147;1934 Act&#148;), that are
incorporated by reference into this Registration Statement; (2)&nbsp;that for the purpose of determining
any liability under the 1933 Act, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering thereof; and (3)&nbsp;to
remove from registration by means of a post-effective amendment any of the securities being
registered which remain unsold upon the termination of the offering under the Plan.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt; margin-left: 5%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;B. The undersigned Registrant hereby undertakes that, for purposes of determining any
liability under the 1933 Act, each filing of the Registrant&#146;s annual report pursuant to Section
13(a) or Section 15(d) of the 1934 Act that is incorporated by reference into this Registration
Statement shall be deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be the initial <I>bona
fide </I>offering thereof.
</DIV>


<DIV align="left" style="font-size: 10pt; margin-top: 12pt; margin-left: 5%">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;C. Insofar as indemnification for liabilities arising under the 1933 Act may be permitted to
directors, officers or controlling persons of the Registrant pursuant to the indemnity provisions
incorporated by reference in Item&nbsp;6, or otherwise, the Registrant has been advised that in the
opinion of the Commission such indemnification is against public policy as expressed in the 1933
Act and is, therefore, unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or paid by a director,
officer or controlling person of the Registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in connection with the securities
being registered, the Registrant will, unless in the opinion of its counsel the matter has been
settled by controlling precedent, submit to a court of appropriate jurisdiction the question
whether such indemnification by it is against public policy as expressed in the 1933 Act and will
be governed by the final adjudication of such issue.
</DIV>


<P align="center" style="font-size: 10pt">II-3
</DIV>

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

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



<!-- link1 "SIGNATURES" -->
<DIV align="left"><A NAME="009"></A></DIV>

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


<DIV align="left" style="font-size: 10pt; margin-top: 12pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the requirements for
filing on Form S-8, and has duly caused this Registration Statement to be signed on its behalf by
the undersigned, thereunto duly authorized, in the City of San Jose, State of California, on this
28th day of March, 2006.
</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">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/ Michael J. Fister
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">Michael J. Fister&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD colspan="2" align="left">President, Chief Executive Officer and Director&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>

</TABLE>

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

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

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


<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>

</TABLE>
<!-- link1 "POWER OF ATTORNEY" -->
<DIV align="left"><A NAME="010"></A></DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 18pt">POWER OF ATTORNEY
</DIV>



<DIV align="left" style="font-size: 10pt; margin-top: 12pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes
and appoints Michael J. Fister, William Porter and R.L. Smith McKeithen, and each of them, his true
and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him
and in his name, place and stead, in any and all capacities, to sign any and all amendments
(including post-effective amendments) to this Registration Statement, and to file the same, with
all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary to be done in
connection therewith, as fully to all intents and purposes as he might or could do in person,
hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or
their or his substitutes or substitute, may lawfully do or cause to be done by virtue hereof.
</DIV>

<DIV align="left" style="font-size: 10pt; margin-top: 12pt">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pursuant to the requirements of the Securities Act of 1933, as amended, 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="32%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="32%">&nbsp;</TD>
    <TD width="2%">&nbsp;</TD>
    <TD width="32%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Signature</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Title</B></TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="center" style="border-bottom: 1px solid #000000"><B>Date</B></TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD 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="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">

<TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ Michael J. Fister
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Michael J. Fister
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">President, Chief Executive
Officer and Director (Principal
Executive Officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">March&nbsp;28, 2006</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="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ William Porter
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;William Porter
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Senior Vice President, Chief
Financial Officer (Principal
Financial Officer and Principal
Accounting Officer)
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">March&nbsp;28, 2006</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="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ John B. Shoven
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;John B. Shoven
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Chairman of the Board of Directors
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">March&nbsp;28, 2006</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="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ Donald L. Lucas
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Donald L. Lucas
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">March&nbsp;28, 2006</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="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ Alberto Sangiovanni-Vincentelli
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Alberto Sangiovanni-Vincentelli
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">March&nbsp;28, 2006</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="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ George M. Scalise
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;George M. Scalise
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">March&nbsp;28, 2006</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="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ Roger S. Siboni
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Roger S. Siboni
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">March&nbsp;28, 2006</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="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ John A.C. Swainson
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;John A.C. Swainson
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">March&nbsp;28, 2006</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="center" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;/s/ Lip-Bu Tan
<DIV style="font-size: 1pt; border-top: 1px solid #000000">&nbsp;</DIV>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Lip-Bu Tan
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Director
</TD>
    <TD>&nbsp;</TD>
    <TD align="center" valign="top">March&nbsp;28, 2006</TD>
</TR>
<!-- End Table Body -->
</TABLE>
</DIV>



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

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

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



<!-- link1 "<U>EXHIBIT INDEX</U>" -->
<DIV align="left"><A NAME="011"></A></DIV>

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

<DIV align="center">
<TABLE style="font-size: 10pt" cellspacing="0" border="0" cellpadding="0" width="100%">
<!-- Begin Table Head -->
<TR valign="bottom">
    <TD width="15%">&nbsp;</TD>
    <TD width="5%">&nbsp;</TD>
    <TD width="80%">&nbsp;</TD>
</TR>
<TR style="font-size: 8pt" valign="bottom">
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Exhibit Number</TD>
    <TD>&nbsp;</TD>
    <TD nowrap align="left" style="border-bottom: 1px solid #000000">Exhibit</TD>
</TR>

<!-- End Table Head -->
<!-- Begin Table Body -->
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">4.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Instruments Defining Rights of Stockholders. Reference is made to the Registrant&#146;s
Registration Statement on Form&nbsp;8-A filed with the Commission on January&nbsp;12, 2006 incorporated
by reference pursuant to Item 3(d).</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 and consent of Gibson, Dunn &#038; Crutcher 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 Independent Registered Public Accounting Firm</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">23.3
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Consent of Gibson, Dunn &#038; Crutcher LLP (contained in Exhibit&nbsp;5.1).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">24.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Power of Attorney (included on the signature pages to this Registration Statement on Form
S-8).</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">&nbsp;</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">&nbsp;</TD>
</TR>
<TR valign="bottom">
    <TD valign="top"><DIV style="margin-left:0px; text-indent:-0px">99.1
</DIV></TD>
    <TD>&nbsp;</TD>
    <TD align="left" valign="top">Praesagus Inc. 2001 Employee, Director and Consultant Stock Option Plan</TD>
</TR>
<TR valign="bottom"><!-- Blank Space -->
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sv8
Table of Contents
As
filed with the Securities and Exchange Commission on March 28, 2006
Registration No. 333-
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM S-8
REGISTRATION STATEMENT
UNDER
THE SECURITIES ACT OF 1933
CADENCE DESIGN SYSTEMS, INC.
(Exact Name of Registrant as Specified in Its Charter)
Delaware
(State or Other Jurisdiction of Incorporation or Organization)
77-0148231
(I.R.S. Employer Identification No.)
2655 Seely Avenue, Building 5
San Jose, California 95134
(Address of Principal Executive Offices) (Zip Code)
Options Assumed by Cadence Design Systems, Inc.
originally granted under the
Praesagus Inc. 2001 Employee, Director and Consultant Stock Option Plan
Praesagus Inc. 2005 Equity Incentive Plan
(together, the "Praesagus Plans")
(Full title of the Plan)
R.L. Smith McKeithen, Esq.
Senior Vice President, General Counsel and Secretary
Cadence Design Systems, Inc.
2655 Seely Avenue, Building 5, San Jose, California 95134
(Name and Address of Agent for Service)
(408) 943-1234
(Telephone Number, Including Area Code, of Agent For Service)
Copies to:
Gregory J. Conklin, Esq.
Gibson, Dunn & Crutcher LLP
One Montgomery Street,
31
st
Floor
San Francisco, California 94104
(415) 393-8200
CALCULATION OF REGISTRATION FEE
Proposed Maximum
Title of Securities
Proposed Maximum Offering Price Per
Aggregate Offering
Amount of
to be Registered
Amount to be Registered
(1)
Share
(2)
Price
(2)
Registration Fee
(2)
Common Stock, par
value $0.01 per share
305,748 shares
$18.02
$5,509,579
$589.52
(1)
This Registration Statement shall also cover any additional shares of
Common Stock which become issuable under the Praesagus Plans by reason of any
stock dividend, stock split, recapitalization or other similar transaction
effected without the receipt of consideration which results in an increase in
the number of the outstanding shares of Cadence Design Systems, Inc. Common
Stock.
(2)
Calculated solely for purposes of this offering under Rule 457(h) of the
Securities Act of 1933, as amended, on the basis of the maximum offering price
per share that such options may be exercised.
TABLE OF CONTENTS
PART I
PART II
Item 3.
Incorporation of Documents by Reference
Item 4.
Description of Securities
Item 5.
Interests of Named Experts and Counsel
Item 6.
Indemnification of Directors and Officers
Item 7.
Exemption from Registration Claimed
Item 8. Exhibits
Item 9.
Undertakings
SIGNATURES
POWER OF ATTORNEY
EXHIBIT INDEX
EXHIBIT 5.1
EXHIBIT 23.1
EXHIBIT 99.1
EXHIBIT 99.2
Table of Contents
PART I
Information Required in the Section 10(a) Prospectus
Pursuant to the instructions to Form S-8, Part I (Information Required in the Section 10(a)
Prospectus) is not filed as part of this Registration Statement.
The shares of common stock subject to options registered hereunder have been assumed by
Cadence Design Systems, Inc. (the "Registrant") pursuant to an Agreement and Plan of Merger, dated
as of March 17, 2006, among the Registrant, Praesagus Inc., a Delaware corporation, and Daffodil
Acquisition, Inc., a Delaware corporation and wholly-owned subsidiary of the Registrant, and Taber
Smith, as stockholder agent. These options were originally granted to directors, employees and
consultants of Praesagus Inc. under the Praesagus Inc. 2001 Employee, Director and Consultant Stock
Option Plan and the Praesagus Inc. 2005 Equity Incentive Plan (together, the "Praesagus Plans").
PART II
Information Required in the Registration Statement
Item 3.
Incorporation of Documents by Reference
The Registrant hereby incorporates by reference into this Registration Statement the following
documents previously filed with the Securities and Exchange Commission (the "Commission"):
(a)
The Registrant's Annual Report on Form 10-K for the fiscal year
ended December 31, 2005, including all material incorporated by reference
therein;
(b)
The Registrant's Current Reports on Form 8-K filed with the
Commission on February 10, 2006, February 13, 2006 and March 1, 2006;
(c)
The Registrant's Amended Current Report on Form 8-K/A filed
with the Commission on February 2, 2006; and
(d)
The description of the Registrant's Common Stock to be offered
hereby contained in the Registrant's Registration Statement on Form 8-A filed
with the Commission on January 12, 2006.
All documents filed pursuant to Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange
Act of 1934, as amended, after the date of this Registration Statement and prior to the filing of a
post-effective amendment which indicates that all securities offered hereby have been sold or which
deregisters all securities then remaining unsold shall be deemed to be incorporated by reference
into this Registration Statement and to be a part hereof from the date of filing of such documents.
Any document, and any statement contained in a document, incorporated or deemed to be
incorporated by reference herein shall be deemed to be modified or superseded for purposes of this
Registration Statement to the extent that a statement contained herein, or in any other
subsequently filed document that also is incorporated or deemed to be incorporated by reference
herein, modifies or supersedes such document or statement. Any such document or statement so
modified or superseded shall not be deemed, except as so modified or superseded, to constitute a
part of this Registration Statement. Subject to the foregoing, all information appearing in this
Registration Statement is qualified in its entirety by the information appearing in the documents
incorporated by reference.
Item 4.
Description of Securities
Not Applicable.
II-1
Table of Contents
Item 5.
Interests of Named Experts and Counsel
Not Applicable.
Item 6.
Indemnification of Directors and Officers
Section 145 of the Delaware General Corporation Law permits a corporation to indemnify any of
its directors or officers who was or is a party or is threatened to be made a party to any third
party proceeding by reason of the fact that such person is or was a director or officer of the
corporation against expenses (including attorneys' fees), judgments, fines and amounts paid in
settlement actually and reasonably incurred by such person in connection with such action, suit or
proceeding, if such person acted in good faith and in a manner such person reasonably believed to
be in or not opposed to the best interests of the corporation, and, with respect to any criminal
action or proceeding, had no reasonable cause to believe that such person's conduct was unlawful.
In a derivative action, i.e., one by or in the right of a corporation, the corporation is permitted
to indemnify any of its directors or officers against expenses (including attorneys' fees) actually
and reasonably incurred by such person in connection with the defense or settlement of such action
or suit if such person acted in good faith and in a manner such person reasonably believed to be in
or not opposed to the best interests of the corporation, except that no indemnification shall be
made if such person shall have been adjudged liable to the corporation, unless and only to the
extent that the court in which such action or suit was brought shall determine upon application
that such person is fairly and reasonably entitled to indemnity for such expenses despite such
adjudication of liability.
Article VII of the Registrant's currently effective Certificate of Incorporation eliminates
the personal liability of its directors for monetary damages for breach of fiduciary duty as a
director, except for liability (i) for any breach of the director's duty of loyalty to the
corporation or its stockholders, (ii) for acts or omissions not in good faith or which involve
intentional misconduct or a knowing violation of law, (iii) under Section 174 of the Delaware
General Corporation Law or (iv) for any transaction from which the director derived an improper
personal benefit. In addition, as permitted by Section 145 of the Delaware General Corporation
Law, the Bylaws of the Registrant provide that: (a) the Registrant is required to indemnify its
directors and officers and persons serving in such capacities in other business entities
(including, for example, subsidiaries of the Registrant) at the Registrant's request (such
directors, officers and other persons are hereinafter referred to collectively as, "Covered
Persons"), to the fullest extent permitted by Delaware law, including those circumstances in which
indemnification would otherwise be discretionary; (b) the Registrant is required to advance
expenses as incurred to such Covered Persons in connection with defending a proceeding; (c) the
indemnitee(s) of the Registrant have the right to bring suit, and to be paid the expenses of
prosecuting such suit, if successful, to enforce the rights to indemnification under the Bylaws or
to advancement of expenses under the Bylaws; (d) the rights conferred in the Bylaws are not
exclusive and the Registrant is authorized to enter into indemnification agreements with such
directors, officers and employees; (e) the Registrant is required to maintain director and officer
liability insurance to the extent reasonably available; and (f) the Registrant may not
retroactively amend the Bylaws indemnification provision in a way that is adverse to such Covered
Persons.
The Registrant has entered into indemnity agreements with each of its executive officers and
directors that provide the maximum indemnity allowed to officers and directors by Section 145 of
the Delaware General Corporation Law and the Bylaws, as well as certain additional procedural
protections. The Registrant also maintains a limited amount of director and officer insurance.
The indemnification provision in the Bylaws, and the indemnity agreements entered into between the
Registrant and its officers or directors, may be sufficiently broad to permit indemnification of
the Registrant's officers and directors for liability arising under the Securities Act of 1933, as
amended (the "1933 Act").
Item 7.
Exemption from Registration Claimed
Not Applicable.
II-2
Table of Contents
Item 8.
Exhibits
Exhibit Number
Exhibit
4.1
Instruments Defining Rights of Stockholders. Reference is made to the Registrant's
Registration Statement on Form 8-A filed with the Commission on January 12, 2006 incorporated
by reference pursuant to Item 3(d).
5.1
Opinion and consent of Gibson, Dunn & Crutcher LLP.
23.1
Consent of Independent Registered Public Accounting Firm
23.3
Consent of Gibson, Dunn & Crutcher LLP (contained in Exhibit 5.1).
24.1
Power of Attorney (included on the signature pages to this Registration Statement on Form
S-8).
99.1
Praesagus Inc. 2001 Employee, Director and Consultant Stock Option Plan
99.2
Praesagus Inc. 2005 Equity Incentive Plan
Item 9.
Undertakings
A. The undersigned Registrant hereby undertakes: (1) to file, during any period in which
offers or sales are being made, a post-effective amendment to this Registration Statement (i) to
include any prospectus required by Section 10(a)(3) of the 1933 Act; (ii) to reflect in the
prospectus any facts or events arising after the effective date of this Registration Statement (or
the most recent post-effective amendment thereof) which, individually or in the aggregate,
represent a fundamental change in the information set forth in this Registration Statement; and
(iii) to include any material information with respect to the plan of distribution not previously
disclosed in this Registration Statement or any material change to such information in this
Registration Statement;
provided however
, that clauses (1)(i) and (1)(ii) shall not apply if the
information required to be included in a post-effective amendment by those clauses is contained in
periodic reports filed with or furnished to the Commission by the Registrant pursuant to Section 13
or Section 15(d) of the Securities Exchange Act of 1934, as amended (the "1934 Act"), that are
incorporated by reference into this Registration Statement; (2) that for the purpose of determining
any liability under the 1933 Act, each such post-effective amendment shall be deemed to be a new
registration statement relating to the securities offered therein, and the offering of such
securities at that time shall be deemed to be the initial bona fide offering thereof; and (3) to
remove from registration by means of a post-effective amendment any of the securities being
registered which remain unsold upon the termination of the offering under the Plan.
B. The undersigned Registrant hereby undertakes that, for purposes of determining any
liability under the 1933 Act, each filing of the Registrant's annual report pursuant to Section
13(a) or Section 15(d) of the 1934 Act that is incorporated by reference into this Registration
Statement shall be deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be the initial
bona
fide
offering thereof.
C. Insofar as indemnification for liabilities arising under the 1933 Act may be permitted to
directors, officers or controlling persons of the Registrant pursuant to the indemnity provisions
incorporated by reference in Item 6, or otherwise, the Registrant has been advised that in the
opinion of the Commission such indemnification is against public policy as expressed in the 1933
Act and is, therefore, unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or paid by a director,
officer or controlling person of the Registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in connection with the securities
being registered, the Registrant will, unless in the opinion of its counsel the matter has been
settled by controlling precedent, submit to a court of appropriate jurisdiction the question
whether such indemnification by it is against public policy as expressed in the 1933 Act and will
be governed by the final adjudication of such issue.
II-3
Table of Contents
SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, as amended, the Registrant
certifies that it has reasonable grounds to believe that it meets all of the requirements for
filing on Form S-8, and has duly caused this Registration Statement to be signed on its behalf by
the undersigned, thereunto duly authorized, in the City of San Jose, State of California, on this
28th day of March, 2006.
CADENCE DESIGN SYSTEMS, INC.
By:
/s/ Michael J. Fister
Michael J. Fister
President, Chief Executive Officer and Director
Table of Contents
POWER OF ATTORNEY
KNOW ALL PERSONS BY THESE PRESENTS, that each person whose signature appears below constitutes
and appoints Michael J. Fister, William Porter and R.L. Smith McKeithen, and each of them, his true
and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him
and in his name, place and stead, in any and all capacities, to sign any and all amendments
(including post-effective amendments) to this Registration Statement, and to file the same, with
all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange
Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and
authority to do and perform each and every act and thing requisite and necessary to be done in
connection therewith, as fully to all intents and purposes as he might or could do in person,
hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them, or
their or his substitutes or substitute, may lawfully do or cause to be done by virtue hereof.
Pursuant to the requirements of the Securities Act of 1933, as amended, this Registration
Statement has been signed below by the following persons in the capacities and on the dates
indicated.
Signature
Title
Date
/s/ Michael J. Fister
Michael J. Fister
President, Chief Executive
Officer and Director (Principal
Executive Officer)
March 28, 2006
/s/ William Porter
William Porter
Senior Vice President, Chief
Financial Officer (Principal
Financial Officer and Principal
Accounting Officer)
March 28, 2006
/s/ John B. Shoven
John B. Shoven
Chairman of the Board of Directors
March 28, 2006
/s/ Donald L. Lucas
Donald L. Lucas
Director
March 28, 2006
/s/ Alberto Sangiovanni-Vincentelli
Alberto Sangiovanni-Vincentelli
Director
March 28, 2006
/s/ George M. Scalise
George M. Scalise
Director
March 28, 2006
/s/ Roger S. Siboni
Roger S. Siboni
Director
March 28, 2006
/s/ John A.C. Swainson
John A.C. Swainson
Director
March 28, 2006
/s/ Lip-Bu Tan
Lip-Bu Tan
Director
March 28, 2006
Table of Contents
EXHIBIT INDEX
Exhibit Number
Exhibit
4.1
Instruments Defining Rights of Stockholders. Reference is made to the Registrant's
Registration Statement on Form 8-A filed with the Commission on January 12, 2006 incorporated
by reference pursuant to Item 3(d).
5.1
Opinion and consent of Gibson, Dunn & Crutcher LLP.
23.1
Consent of Independent Registered Public Accounting Firm
23.3
Consent of Gibson, Dunn & Crutcher LLP (contained in Exhibit 5.1).
24.1
Power of Attorney (included on the signature pages to this Registration Statement on Form
S-8).
99.1
Praesagus Inc. 2001 Employee, Director and Consultant Stock Option Plan
99.2
Praesagus Inc. 2005 Equity Incentive Plan