<SUBMISSION>
<ACCESSION-NUMBER>0000950134-04-008241
<TYPE>DEFA14A
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<FILING-DATE>20040528
<EFFECTIVENESS-DATE>20040528
<FILER>
<COMPANY-DATA>
<CONFORMED-NAME>CADENCE DESIGN SYSTEMS INC
<CIK>0000813672
<ASSIGNED-SIC>7372
<IRS-NUMBER>770148231
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>0102
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<FILE-NUMBER>001-10606
<FILM-NUMBER>04839027
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<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
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<FORMER-CONFORMED-NAME>ECAD INC /DE/
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<SEQUENCE>1
<FILENAME>f99354defa14a.htm
<DESCRIPTION>PROXY STATEMENT ADDITIONAL MATERIALS
<TEXT>
<HTML>
<HEAD>
<TITLE>defa14a</TITLE>
</HEAD>
<BODY bgcolor="#FFFFFF">
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<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>
<P align="center"><FONT size="2"><B>UNITED STATES<BR>
SECURITIES AND EXCHANGE COMMISSION<BR>
WASHINGTON, D.C. 20549</B></FONT>

<P align="center"><FONT size="2"><B>SCHEDULE 14A</B><BR>
(RULE 14a-101)
</FONT>
<P align="center"><FONT size="2"><B>INFORMATION REQUIRED IN PROXY STATEMENT</B></FONT>
<P align="center"><FONT size="2"><B>SCHEDULE 14A INFORMATION</B></FONT>

<P align="center"><FONT size="2"><B>Proxy Statement Pursuant To
Section 14(A) of the<BR>
Securities Exchange Act of 1934 (Amendment
No.&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;)</B></FONT>



<P><FONT size="2">Filed by the Registrant &#091;&nbsp;X&nbsp;&#093;
</FONT>
<P><FONT size="2">Filed by a Party other than the Registrant &#091;&nbsp;&nbsp;&nbsp;&#093;
</FONT>
<P><FONT size="2">Check the appropriate box:
</FONT>
<CENTER>
<TABLE cellspacing="0" border="0" cellpadding="0" width="100%">
<TR valign="bottom">
        <TD width="2%">&nbsp;</TD>
        <TD width="3%">&nbsp;</TD>
        <TD width="95%">&nbsp;</TD>
</TR>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&#091;&nbsp;&nbsp;&nbsp;&#093;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
Preliminary Proxy Statement</FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&#091;&nbsp;&nbsp;&nbsp;&#093;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
Definitive Proxy Statement</FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&#091;&nbsp;&nbsp;&nbsp;&#093;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
Confidential, for Use of the Commission Only (as permitted by Rule&nbsp;14a-6(e)(2))</FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&#091;&nbsp;X&nbsp;&#093;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
Definitive Additional Materials</FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&#091;&nbsp;&nbsp;&nbsp;&#093;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
Soliciting Material Pursuant to sec. 240.14a-11(c) or sec. 240.14a-12</FONT></TD>
</TR>
</TABLE>
</CENTER>
<P>&nbsp;</P>
<P>


<P align="center"><FONT size="4"><B>CADENCE DESIGN SYSTEMS, INC.</B></FONT>
<HR size="1" noshade>
<DIV align="center"><FONT size="2"><B>(Name of Registrant as Specified In Its Charter)</B></FONT></DIV>

<BR CLEAR="all">
<P align="center"><FONT size="3"><B>&nbsp;</B></FONT>
<HR size="1" noshade>
<DIV align="center"><FONT size="2"><B>(Name of Person(s) Filing Proxy Statement, if other than the Registrant)</B></FONT></DIV>

<P><FONT size="2">Payment of Filing Fee (Check the appropriate box):
</FONT>
<CENTER>
<TABLE cellspacing="0" border="0" cellpadding="0" width="100%">
<TR valign="bottom">
        <TD width="1%">&nbsp;</TD>
        <TD width="1%">&nbsp;</TD>
        <TD width="3%">&nbsp;</TD>
        <TD width="2%">&nbsp;</TD>
        <TD width="93%">&nbsp;</TD>
</TR>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&#091;&nbsp;X&nbsp;&#093;</FONT></TD>
        <TD align="left" valign="top" colspan="4"><FONT size="2">&nbsp;&nbsp;Fee not required.</FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&#091;&nbsp;&nbsp;&nbsp;&#093;</FONT></TD>

<TD align="left" valign="top" colspan="4"><FONT size="2">&nbsp;&nbsp;Fee computed on table below per Exchange Act Rules&nbsp;14a-6(i)(1) and 0-11.</FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
        <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
(1)
</FONT></TD>
        <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top" colspan="2"><FONT size="2">Title of each class of securities to which transaction applies:<BR><BR>
        <HR size="1" noshade></FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
(2)
</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">Aggregate number of securities to which transaction applies:<BR><BR>
        <HR size="1" noshade></FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
(3)
</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">Per unit price or other underlying value of transaction
computed pursuant to Exchange Act Rule&nbsp;0-11 (set forth the
amount on which the filing fee is calculated and state how it
was determined):<BR><BR>
        <HR size="1" noshade></FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
(4)
</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">Proposed maximum aggregate value of transaction:<BR><BR>
        <HR size="1" noshade></FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
(5)
</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">Total fee paid:<BR><BR>
        <HR size="1" noshade></FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&#091;&nbsp;&nbsp;&nbsp;&#093;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top" colspan="3"><FONT size="2">Fee paid previously with preliminary materials.</FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&#091;&nbsp;&nbsp;&nbsp;&#093;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top" colspan="3"><FONT size="2">Check box if any part of the fee is offset as provided by Exchange Act Rule&nbsp;0-11(a)(2) and identify the
filing for which the offsetting fee was paid previously. Identify the previous filing by registration
statement number, or the Form or Schedule and the date of its filing.</FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
(1)
</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">Amount Previously Paid:<BR><BR>
        <HR size="1" noshade></FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
(2)
</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">Form, Schedule or Registration Statement No.:<BR><BR>
        <HR size="1" noshade></FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
(3)
</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">Filing Party:<BR><BR>
        <HR size="1" noshade></FONT></TD>
</TR>
<TR><TD><TR><TD><TR><TD><TR><TD>
<TR valign="bottom">
        <TD valign="top"><FONT size="2">&nbsp;</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">
(4)
</FONT></TD>
        <TD><FONT size="2">&nbsp;</FONT></TD>
        <TD align="left" valign="top"><FONT size="2">Date Filed:<BR><BR>
        <HR size="1" noshade></FONT></TD>
</TR>
</TABLE>
</CENTER>

<P align="center"><FONT size="2"></FONT>
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<P><HR noshade><P>
<H5 align="left" style="page-break-before:always">&nbsp;</H5><P>

<DIV align="center">
 <B><FONT size="4">CADENCE DESIGN SYSTEMS, INC.</FONT></B>
</DIV>

<DIV align="center">
<B><FONT size="2">2655 SEELY AVENUE</FONT></B>
</DIV>

<DIV align="center">
<B><FONT size="2">SAN JOSE, CALIFORNIA 95134</FONT></B>
</DIV>

<P align="center">
<HR size="1" width="26%" align="center" noshade>

<P align="center">
<B>SUPPLEMENT</B>

<DIV align="center">
<B>TO PROXY STATEMENT</B>
</DIV>

<DIV align="center">
<B>FOR ANNUAL MEETING OF STOCKHOLDERS</B>
</DIV>

<DIV align="center">
<B>JUNE&nbsp;15, 2004</B>
</DIV>

<P align="center">
<HR size="1" width="26%" align="center" noshade>

<P align="left">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<FONT size="2">This Supplement updates and amends certain
information contained in the Proxy Statement dated
April&nbsp;28, 2004, of Cadence Design Systems, Inc., referred
to in this Supplement as Cadence, and delivered to stockholders
in connection with the solicitation of proxies by the Board of
Directors of Cadence for use at its Annual Meeting of
Stockholders to be held on June&nbsp;15, 2004.
</FONT>

<P align="left">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<FONT size="2">On May&nbsp;12, 2004, Cadence announced that
Michael J. Fister has been named president and chief executive
officer, succeeding H. Raymond Bingham, who has been elected
Chairman of the Cadence Board of Directors. Mr.&nbsp;Bingham
will continue as a full-time executive. Former chairman Donald
L. Lucas will continue on the Board as a director. In addition,
the Board of Directors named director Roger S. Siboni as lead
director to preside over the meetings of Cadence&#146;s
non-management directors and the independent directors. A copy
of the press release announcing these management changes is
attached to this Supplement as <U>Appendix&nbsp;A</U>.
</FONT>

<P align="left">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<FONT size="2">On May&nbsp;28, 2004, Cadence announced that Sean
M. Maloney has decided not to stand for reelection to
Cadence&#146;s Board of Directors. The Board has elected not to
propose a substitute nominee at this time. Accordingly,
eight&nbsp;(8) rather than nine&nbsp;(9) directors will be
elected at the annual meeting and the Board of Directors
recommends a vote in favor of the remaining eight
(8)&nbsp;nominees. A copy of the press release announcing
Mr.&nbsp;Maloney&#146;s decision not to stand for reelection is
attached to this Supplement as <U>Appendix&nbsp;B</U>.
</FONT>

<P align="left">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<FONT size="2">Other than reducing the number of directors
standing for election to the Board, this Supplement does not
change the proposals to be voted on at the annual meeting, which
are described in the Proxy Statement.
</FONT>

<P align="left">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<FONT size="2">All stockholders are cordially invited to attend
the annual meeting in person. However, to ensure your
representation at the annual meeting, and in case you have not
already voted, please complete, date, sign and return the
enclosed proxy card(s) or the proxy card(s) previously sent to
you as promptly as possible. If you have already returned your
proxy card(s), you do not have to do anything else unless you
wish to revoke or change your vote. You may revoke your proxy by
filing a written notice of revocation or a duly executed proxy
bearing a later date with the Cadence Corporate Secretary at
Cadence&#146;s principal executive offices, located at 2655
Seely Avenue, Building&nbsp;5, San&nbsp;Jose, California 95134,
or by attending the annual meeting and voting in person.
However, attendance at the meeting will not, by itself, be
sufficient to revoke a proxy.
</FONT>
<P>

<TABLE width="100%" border="0" cellpadding="0" cellspacing="0">

<TR>
    <TD width="40%"></TD>
    <TD width="60%"></TD>
</TR>

<TR valign="top">
    <TD>&nbsp;</TD>
    <TD align="left">
    <FONT size="2">By Order of the Board of Directors
    </FONT></TD>
</TR>

<TR>
    <TD>&nbsp;</TD>
</TR>

<TR valign="top">
    <TD>&nbsp;</TD>
    <TD align="left">
    <IMG src="f99354f9935400.gif" alt="-s- R.L. Smith McKeithen"></TD>
</TR>

<TR>
    <TD>&nbsp;</TD>
</TR>

<TR valign="top">
    <TD>&nbsp;</TD>
    <TD align="left">
    <FONT size="2">R.L. Smith McKeithen
    </FONT></TD>
</TR>

<TR valign="top">
    <TD>&nbsp;</TD>
    <TD align="left">
    <FONT size="2">Secretary
    </FONT></TD>
</TR>

</TABLE>

<P align="left">
<FONT size="2">San&nbsp;Jose, California
</FONT>

<DIV align="left">
<FONT size="2">May&nbsp;28, 2004
</FONT>
</DIV>

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

<DIV align="center">
<B><FONT size="2">APPENDIX&nbsp;A</FONT></B>
</DIV>

<P align="center">
<B><FONT size="2">Cadence Design Systems Names Michael J.
Fister, Former Top Intel Executive,</FONT></B>

<DIV align="center">
<B><FONT size="2">as President and CEO</FONT></B>
</DIV>

<P align="center">
<FONT size="2">Ray Bingham Elected Chairman of the Board
</FONT>

<P align="left">
<FONT size="2">San&nbsp;Jose, CA , May&nbsp;12, 2004&nbsp;&#151;
Cadence Design Systems, Inc. (NYSE: CDN) today announced that
Michael J. Fister has been named president and chief executive
officer, succeeding Ray Bingham, who has been elected chairman
of the Cadence Board of Directors. Mr.&nbsp;Bingham will
continue as a full-time executive, working with Mr.&nbsp;Fister
to help ensure a seamless transition. Former chairman Donald L.
Lucas will continue on the Board as a director. The appointments
are effective immediately.
</FONT>

<P align="left">
<FONT size="2">Mr.&nbsp;Fister was most recently senior vice
president at Intel Corporation and general manager of the
Enterprise Platforms Group, which designs, markets, and supports
building blocks for enterprise computing. During his tenure,
Intel garnered commanding market segment share and introduced
the Itanium<SUP>TM</SUP> processor family which leads in
virtually every performance benchmark category. Other products
include a complement of IA-32 Xeon processors, chipsets,
boards/systems, and software tools and services.
</FONT>

<P align="left">
<FONT size="2">&#147;Mike brings a combination of deep design
and semiconductor manufacturing expertise and leadership
experience at one of Intel&#146;s largest business groups,&#148;
said Ray Bingham, chairman of the Cadence Board of Directors.
&#147;At Intel, one of his strategic contributions was to
develop and deliver the end-to-end enterprise solutions desired
by CIOs. As a result, he was a driving force in elevating
Intel&#146;s position to that of a trusted advisor and true
partner with its customers; with Mike on board, we have the
opportunity to solidify a similar position for Cadence.&#148;
</FONT>

<P align="left">
<FONT size="2">&#147;I am excited about this opportunity to lead
Cadence through the next phase in the evolution of semiconductor
and system design,&#148; said Mike Fister, president and CEO of
Cadence. &#147;As a former customer, I look forward to working
with our management team and employees to further strengthen
Cadence&#146;s global technology leadership and the role of the
entire electronic design automation industry in enabling our
customers to build even more complex devices and achieve greater
profitability in their markets.&#148;
</FONT>

<P align="left">
<FONT size="2">Mr.&nbsp;Fister first joined Intel in 1987, was
appointed an Intel vice president in 1996, elected a corporate
vice president in 2000, and promoted to senior vice president in
2002. He was responsible for the design, development, and
marketing of IA-32 processors, including the last versions of
the Intel486<SUP>TM</SUP>, as well as Pentium&#174; Pro,
Pentium&#174;&nbsp;II, Pentium&#174;&nbsp;III, Celeron&#174;,
Pentium&#174;&nbsp;II Xeon<SUP>TM</SUP>, and
Pentium&#174;&nbsp;III Xeon processors. Mr.&nbsp;Fister received
his bachelor&#146;s and master&#146;s degrees in electrical
engineering from the University of Cincinnati.
</FONT>

<P align="left">
<FONT size="2">&#147;These appointments represent a tremendous
opportunity for Cadence,&#148; said Don Lucas, member of the
Cadence Board of Directors and former Chairman of the Board.
&#147;With Mike&#146;s technology background and the experience
and deep business acumen Ray Bingham will contribute, Cadence is
positioned for future market success and long-term growth.&#148;
</FONT>

<P align="left">
<FONT size="2">In addition to his new role leading the Board of
Directors as chairman, Mr.&nbsp;Bingham will have day-to-day
responsibilities working closely with Mr.&nbsp;Fister to assure
a smooth leadership transition. He will also continue to focus
on the company&#146;s global growth strategies to strengthen
customer and partner relationships, shareholder and investor
communications, and industry and public issues important to
Cadence.
</FONT>

<P align="left">
<FONT size="2">Mr.&nbsp;Bingham joined Cadence in 1993 and was
executive vice president and chief financial officer until being
appointed president and CEO in 1999. Bingham was instrumental in
transforming Cadence from a $369&nbsp;million supplier of
electronic design automation tools to $1.1&nbsp;billion in 2003.
This growth was fueled by Mr.&nbsp;Bingham&#146;s success in
establishing global strategic partnerships with companies such
as IBM, Agilent, Hewlett-Packard, and Fujitsu. He also serves on
the boards of directors of KLA-Tencor and Oracle Corporation.
</FONT>

<P align="left">
<FONT size="2">The Board today also named Roger Siboni, chairman
and former CEO of E.piphany, to be lead director.
Mr.&nbsp;Siboni has served on the Cadence Board of Directors
since 1999, and chairs the Board&#146;s Audit committee. Before
leading E.piphany, he was deputy chairman and chief operating
officer of KPMG LLP. The lead
</FONT>

<P align="center"><FONT size="2">A-1
</FONT>

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

<DIV align="left">
<FONT size="2">director position being filled by Mr.&nbsp;Siboni
is provided for in the Corporate Governance Guidelines of
Cadence&#146;s Board of Directors. These guidelines and related
governance materials may be accessed on Cadence&#146;s corporate
website at http://www.cadence.com/company/investor<U>
</U>relations/governance.aspx.
</FONT>
</DIV>

<P align="left">
<B><FONT size="2">About Cadence</FONT></B>

<P align="left">
<FONT size="2">Cadence is the largest supplier of electronic
design technologies, methodology services, and design services.
Cadence solutions are used to accelerate and manage the design
of semiconductors, computer systems, networking and
telecommunications equipment, consumer electronics, and a
variety of other electronics-based products. With approximately
4,800 employees and 2003 revenues of approximately
$1.1&nbsp;billion, Cadence has sales offices, design centers,
and research facilities around the world. The company is
headquartered in San&nbsp;Jose, Calif., and traded on the New
York Stock Exchange under the symbol CDN. More information about
the company, its products and services is available at
www.cadence.com.
</FONT>

<P align="left">
<I><FONT size="2">The statements contained above 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 uncertainties and other factors, many of which are
outside Cadence&#146;s control, including, among others:
Cadence&#146;s ability to compete successfully in the design
automation product and the commercial electronic design and
methodology services industries; the mix of products and
services sold and the timing of significant orders for its
products; economic uncertainty; fluctuations in rates of
exchange between the U.S.&nbsp;dollar and the currencies of
other countries in which Cadence does business; and the
acquisition of other companies or the failure to successfully
integrate those it acquires.</FONT></I>

<P align="left">
<I><FONT size="2">For a detailed discussion of these and other
cautionary statements, please refer to the company&#146;s
filings with the Securities and Exchange Commission, including
the company&#146;s Annual Report on Form&nbsp;10-K for the year
ended January&nbsp;3, 2004 and Quarterly Report on
Form&nbsp;10-Q for the 3&nbsp;months ended April&nbsp;3,
2004.</FONT></I>

<P align="left">
<I><FONT size="2">Cadence and the Cadence logo are registered
trademarks of Cadence Design Systems, Inc. All other trademarks
are the property of their respective owners.</FONT></I>

<P align="center">
<FONT size="2">***
</FONT>

<P align="left">
<B><FONT size="2">Conference Call Today at 8:30&nbsp;a.m.
PDT</FONT></B>

<P align="left">
<FONT size="2">Cadence will host a listen-only conference call
and a question-and-answer session with financial analysts to
follow today at 8:30&nbsp;a.m. PDT. The call-in numbers are as
follows:
</FONT>

<P align="left">
<FONT size="2">U.S. and International: 212-271-4514
</FONT>

<P align="left">
<FONT size="2">The call will simultaneously be webcast at: <BR>
 www.cadence.com/company/investor<U> </U>relations
</FONT>

<P align="left">
<FONT size="2">An audio replay of the conference call will be
available approximately two hours after the conference call has
ended, until 5:00&nbsp;p.m. on May&nbsp;19, 2004.
</FONT>

<P align="left">
<FONT size="2">Replay U.S.: 800-633-8284 <BR>
 Replay International: 402-977-9140 <BR>
 (You must reference the conference reservation number 21195688)
</FONT>

<P align="left">
<FONT size="2">Contact: <BR>
 Cadence Design Systems, Inc. <BR>
 Adolph Hunter, 408-428-5882 <BR>
 Corporate Communications <BR>
 Adolph@cadence.com <BR>
 Alan Lindstrom, 408-944-7100 <BR>
 Investors and Shareholders <BR>
 Investor<U> </U>relations@cadence.com
</FONT>

<P align="center"><FONT size="2">A-2
</FONT>

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

<DIV align="center">
<B><FONT size="2">APPENDIX&nbsp;B</FONT></B>
</DIV>

<P align="center">
<B><FONT size="2">Cadence Design Systems Announces Sean Maloney
Not Standing for Reelection as Director</FONT></B>

<P align="left">
<FONT size="2">San&nbsp;Jose, CA , May&nbsp;28, 2004&nbsp;&#151;
Cadence Design Systems, Inc. (NYSE: CDN) today announced that
Sean M. Maloney has decided not to stand for reelection to
Cadence&#146;s Board of Directors. Mr.&nbsp;Maloney has been a
Cadence director since 2002.
</FONT>

<P align="left">
<FONT size="2">&#147;Sean Maloney has made significant
contributions to the Cadence Board, and we are grateful for his
service,&#148; said Ray Bingham, Chairman of the Board.
&#147;His broad industry and business perspective has helped
Cadence as we&#146;ve repositioned ourselves over the past few
years for further growth and leadership in the global technology
industry.&#148;
</FONT>

<P align="left">
<FONT size="2">Cadence plans to replace Mr.&nbsp;Maloney&#146;s
position on the board in due course.
</FONT>

<P align="left">
<B><FONT size="2">About Cadence</FONT></B>

<P align="left">
<FONT size="2">Cadence is the largest supplier of electronic
design technologies, methodology services, and design services.
Cadence solutions are used to accelerate and manage the design
of semiconductors, computer systems, networking and
telecommunications equipment, consumer electronics, and a
variety of other electronics-based products. With approximately
4,800 employees and 2003 revenues of approximately
$1.1&nbsp;billion, Cadence has sales offices, design centers,
and research facilities around the world. The company is
headquartered in San&nbsp;Jose, Calif., and traded on the New
York Stock Exchange under the symbol CDN. More information about
the company, its products and services is available at
www.cadence.com.
</FONT>

<P align="left">
<I><FONT size="2">The statements contained above 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 uncertainties and other factors, many of which are
outside Cadence&#146;s control, including, among others:
Cadence&#146;s ability to compete successfully in the design
automation product and the commercial electronic design and
methodology services industries; the mix of products and
services sold and the timing of significant orders for its
products; economic uncertainty; fluctuations in rates of
exchange between the U.S.&nbsp;dollar and the currencies of
other countries in which Cadence does business; and the
acquisition of other companies or the failure to successfully
integrate those it acquires.</FONT></I>

<P align="left">
<I><FONT size="2">For a detailed discussion of these and other
cautionary statements, please refer to the company&#146;s
filings with the Securities and Exchange Commission, including
the company&#146;s Annual Report on Form&nbsp;10-K for the year
ended January&nbsp;3, 2004 and Quarterly Report on
Form&nbsp;10-Q for the 3&nbsp;months ended April&nbsp;3,
2004.</FONT></I>

<P align="left">
<I><FONT size="2">Cadence and the Cadence logo are registered
trademarks of Cadence Design Systems, Inc. All other trademarks
are the property of their respective owners.</FONT></I>

<P align="left">
<FONT size="2">For more information, please contact: <BR>
 Adolph Hunter <BR>
 Corporate Communications <BR>
 Cadence Design Systems, Inc. <BR>
 direct: 408.428.5882 <BR>
 Adolph@cadence.com
</FONT>

<P align="left">
<FONT size="2">For more information, please contact: <BR>
 Alan Lindstrom <BR>
 Investors and Shareholders <BR>
 Cadence Design Systems, Inc. <BR>
 direct: 408.944.7100 <BR>
 Investor<U> </U>relations@cadence.com
</FONT>

<P align="center"><FONT size="2">B-1
</FONT>
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