MENTOR GRAPHICS CORP
DFAN14A, 1998-09-28
COMPUTER INTEGRATED SYSTEMS DESIGN
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                         QUICKTURN DESIGN SYSTEMS, INC.
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                (Name of Registrant as Specified In Its Charter)

                          MENTOR GRAPHICS CORPORATION
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                                                              September 25, 1998
 
The Board of Directors
Quickturn Design Systems, Inc.
55 West Trimble Road
San Jose, California 95131
 
Gentlemen:
 
    When I met with your Chairman, Glen Antle, on August 11, 1998 -- at a
meeting requested by Mr. Antle -- I proposed that Mentor Graphics acquire
Quickturn in a $12.125 per share, all-cash transaction. This price represented a
greater than 50% premium over Quickturn's closing stock price on that date. As I
stated at that time, we are prepared to negotiate a transaction with Quickturn
and to consider an increased offer if due diligence shows greater value.
 
    In the nearly six weeks since that meeting, we have stood ready to negotiate
a transaction with you and have made repeated efforts to arrange a meeting for
that purpose. These efforts include my personal calls to Mr. Antle and to Keith
Lobo, Quickturn's chief executive officer, calls from our investment bankers to
your investment bankers, and calls from our counsel to your counsel.
 
    For example, one of my attempts to call Mr. Lobo occurred on Friday, August
28, when I left my office number as well as home number for the weekend. Mr.
Lobo's only response was a message he left on voicemail -- at half-past midnight
on August 31 -- saying that he would be out of town that week and "perhaps"
would get back to me thereafter.
 
    Similarly, when one of your own outside advisers suggested that I make
another call, I called Mr. Antle on September 4. Mr. Antle's response was simply
that he would get back to me.
 
    Despite all our efforts, neither Mr. Antle nor Mr. Lobo has called me to
arrange a meeting.
 
    Instead, in our opinion, your actions throughout the six-week period have
been to erect barriers to our all-cash, premium offer, to entrench the Board and
management, and to ignore the best interests of your stockholders.
 
    Specifically, after the commencement of our offer, you adopted new bylaw
amendments which, if valid, would take away for more than 90 days your
stockholders' ability to replace the current Quickturn directors, thus blocking
the stockholders' ability to decide for themselves the merits of our offer.
 
    Furthermore, after the commencement of our offer, you amended Quickturn's
poison pill, an action which, if upheld, would make it impossible as a practical
matter for Mentor to purchase shares from your stockholders for an additional
six months after these same stockholders are finally given the opportunity to
replace Quickturn's Board of Directors to facilitate our offer.
 
    If your entrenchment efforts are successful (we believe that the Delaware
court will strike them down), you will prevent your stockholders for a period of
more than 270 days -- nine months -- from accepting an offer that we believe
they want the right to accept today. Why are you going to such lengths to
prevent your own stockholders from exercising their right to accept our offer?
Are you simply afraid of the choice they would make?
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    It would be bad enough if your efforts to stonewall us and entrench
yourselves stopped there. But clearly they have not:
 
    - In addition to your bylaw and poison pill amendments, you have done
      everything you can through wasteful litigation to delay the stockholders'
      meeting where the stockholders will get a chance to express their views on
      our offer and on your performance as a Board of Directors. On September
      11, we delivered substantially more than the requisite number of agent
      designations from Quickturn stockholders to call a Special Stockholders
      Meeting. However, you and your lawyers have pursued meritless litigation
      to defer indefinitely the date of the meeting we called for October 29. In
      our opinion, you are wasting millions of dollars of your stockholders'
      money on lawyers and investment bankers to entrench yourselves and to
      block our offer. This diminishes the value of Quickturn to Mentor and, in
      turn, to your stockholders.
 
    - You have touted Hambrecht & Quist's "inadequacy" opinion as justification
      for your rejection of Mentor's offer. A stockholder might well question
      how inadequate a $12.125 all-cash offer could be -- especially when you
      repriced employee stock options to $7.44 only two months before our offer.
      Why have you refused to disclose the important information stockholders
      need to evaluate H&Q's opinion that our 50% premium cash offer is
      "inadequate"? Your stockholders need to know the analyses conducted, the
      assumptions made and ranges of value resulting from such analyses. Are you
      afraid to let your stockholders see that information too?
 
    - You have also touted your business prospects for the third and fourth
      quarters of 1998. But -- just as with the H&Q opinion -- you provide no
      basis for your stockholders to assess the credibility of your assertion.
      What, for example, is the basis for your speculation about the "imminent"
      reinvestment cycle in new design activity in the Asia/Pacific region in
      your September 22 and September 24, 1998 stockholder letters? Why should
      your stockholders believe these or any other ambitious projections by
      Quickturn when, in our view, you have repeatedly failed to deliver on past
      predictions?
 
    - You say that the Mentor offer has been "disruptive" to your sales efforts
      and relationships with suppliers. Is this another way of saying that your
      business is off -- yet again? If so, don't your stockholders have a right
      to know, particularly when you are talking about your supposedly "strong"
      business prospects for the third and fourth quarters?
 
    - You similarly tout your "business plan" but you do not provide any
      meaningful information about that plan to your stockholders. Your
      September 24, 1998 letter to stockholders entitled "The Quickturn Business
      Plan" merely reads like a product catalog. What are your assumptions for
      such factors as revenue growth and operating profit made in this business
      plan? It appears to us to be the same basic business plan that has brought
      about the disappointing operating and stock-price performance of the past
      two years. Why should your stockholders accept this plan today?
 
    Mentor Graphics calls on you -- the Quickturn Board -- to stop these
obstructionist and wasteful tactics and do the right thing by your stockholders.
Give your stockholders the chance to make their own decision based on full
information, rather than vague comments concerning "inadequacy" and, in our
view, based on your track record, unrealistic prospects.
 
    Now, as before, we remain ready to sit down and discuss the acquisition with
you. And even if you continue to refuse to negotiate, we at Mentor Graphics
remain committed to completing the acquisition.
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                                          Very truly yours,
 
                                          /s/ WALDEN C. RHINES
                                          Walden C. Rhines
                                          President and
                                            Chief Executive Officer


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