SUMMIT DESIGN INC
S-3/A, 1998-01-30
PREPACKAGED SOFTWARE
Previous: CLEARNET COMMUNICATIONS INC, SC 13G/A, 1998-01-30
Next: WITTER DEAN SPECTRUM STRATEGIC LP, 424B3, 1998-01-30



<PAGE>

   
    As filed with the Securities and Exchange Commission on January 30, 1998
                             Registration No. 333-44003
- ------------------------------------------------------------------------------
- ------------------------------------------------------------------------------
    
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

   
                                 Amendment No. 1
                                       to
    
                                    FORM S-3
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933

                               SUMMIT DESIGN, INC.
              (Exact name of registrant as specified in its charter)

       DELAWARE                                        93-1137888             
(State of incorporation)                  (I.R.S. Employer Identification No.)
                                       
                              9305 S.W. GEMINI DRIVE
                             BEAVERTON, OREGON  97008
                                (503) 643-9281
(Address, including zip code, and telephone number, including area code, of 
registrant's principal executive offices)
                  
                                LARRY J. GERHARD
                   PRESIDENT AND CHIEF EXECUTIVE OFFICER
                               SUMMIT DESIGN, INC.
                             9305 S.W. GEMINI DRIVE
                             BEAVERTON, OREGON  97008
                                 (503) 643-9281

(Name, address, including zip code, and telephone number, including area 
code, of agent for service)
                                       
                                  COPIES TO:
                            ALAN K. AUSTIN, ESQ.
                          STEVEN V. BERNARD, ESQ.
                          SUSAN L. STAPLETON, ESQ.
                       WILSON SONSINI GOODRICH & ROSATI
                           PROFESSIONAL CORPORATION
                             650 PAGE MILL ROAD
                         PALO ALTO, CALIFORNIA 94304
                                (650) 493-9300
                                       
       Approximate date of commencement of proposed sale to the public:
  FROM TIME TO TIME AFTER THE EFFECTIVE DATE OF THIS REGISTRATION STATEMENT.
                                       
     If the only securities being registered on this Form are to be offered
pursuant to dividend or interest reinvestment plans, please check the following
box. / /
     If any of the securities being registered on this Form are to be offered
on a delayed or continuous basis pursuant to Rule 415 under the Securities Act
of 1933 (the "Securities Act"), other than securities offered only in
connection with dividend or interest reinvestment plans, check the following
box. /X/
     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following
box and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. / /

     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. / /

     If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. / /

   
<TABLE>
<CAPTION>                                        
                         CALCULATION OF REGISTRATION FEE
<S>                             <C>           <C>                          <C>                          <C>
- -------------------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------------------
  TITLE OF EACH CLASS OF        AMOUNT TO BE      PROPOSED MAXIMUM               PROPOSED MAXIMUM          AMOUNT OF     
SECURITIES TO BE REGISTERED      REGISTERED   OFFERING PRICE PER SHARE(1)  AGGREGATE OFFERING PRICE(1)  REGISTRATION FEE(2)
- -------------------------------------------------------------------------------------------------------------------------
Common Stock, par value 
  $0.01 per share....            529,603               $9.92                      $5,253,662                $1,550
- -------------------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------------------
</TABLE>
    

   
(1)  Estimated in accordance with Rule 457(c) under the Securities Act solely 
     for the purpose of computing the registration fee. The $9.92 is a 
     weighted average price of (1) the high-low average price of $9.95 on 
     January 5, 1998 for 447,856 shares and (2) the high-low average price of 
     $9.78 on January 27, 1998 for 81,747 shares as reported on the Nasdaq 
     National Market.

(2) Includes $235 for this Amendment No. 1 and $1,315 previously paid.
    

  THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR 
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT 
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS 
REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH 
SECTION 8(a) OF THE SECURITIES ACT OR UNTIL THE REGISTRATION STATEMENT SHALL 
BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SECTION 
8(a), MAY DETERMINE.

- ------------------------------------------------------------------------------
- ------------------------------------------------------------------------------


<PAGE>
   
PROSPECTUS
(Subject to completion, dated January 30, 1998)
    

   
                                 529,603 SHARES
    

                               SUMMIT DESIGN, INC.

                                  COMMON STOCK

                          ---------------------------
   
   This Prospectus relates to the public offering, which is not being 
underwritten, of up to 529,603 shares of Common Stock, par value $0.01 per 
share (the "Shares"), of Summit Design, Inc. ("Summit" or the "Company"), 
which may be offered from time to time by certain stockholders of the Company 
or by pledgees, donees, transferees or other successors in interest that 
receive such shares as a gift, partnership distribution or other non-sale 
related transfer (the "Selling Stockholders").  The Company will receive no 
part of the proceeds of such sales.  All of the Shares were originally issued 
by the Company in connection with the Company's acquisition by statutory 
merger of TriQuest Design Automation, Inc. ("TriQuest"), by and through the 
merger of a wholly-owned subsidiary of Summit ("Sub") with and into TriQuest 
(the "Merger").  The Shares were issued pursuant to an exemption from the 
registration requirements of the Securities Act of 1933, as amended (the 
"Securities Act"), pursuant to Section 4(2) thereof.  The Shares are being 
registered by the Company pursuant to the Agreement and Plan of 
Reorganization (the "Reorganization Agreement") by and among Summit, Sub and 
TriQuest.
    

   The Shares may be offered by the Selling Stockholders from time to time in 
transactions on one or more exchanges, including the Nasdaq National Market, 
or in the over-the-counter market or otherwise, at prices and at terms then 
prevailing or at prices related to the then current market prices or in 
negotiated transactions.  See "Plan of Distribution."  The price at which any 
of the Shares may be sold, and the commissions, if any, paid in connection 
with any such sale, are unknown and may vary from transaction to transaction. 
The Company will pay all expenses incident to the offering and sale of the 
Shares to the public other than any commissions and discounts of 
underwriters, dealers or agents and any transfer taxes.  To the extent 
required, the specific shares of Common Stock to be sold, the public offering 
price, the names of any agent, dealer or underwriter and any applicable 
commission or discount with respect to any particular offer is set forth 
herein or will be set forth in an accompanying Prospectus Supplement. See 
"Selling Stockholders" and "Plan of Distribution."

   
   The Company's Common Stock is listed on the Nasdaq National Market under 
the symbol "SMMT."  On January 29, 1998, the closing price of the Company's 
Common Stock on the Nasdaq National Market was $13.75 per share.
    
                                       
                          ---------------------------

      SEE "RISK FACTORS" BEGINNING ON PAGE 4 FOR INFORMATION THAT SHOULD
                    BE CONSIDERED BY PROSPECTIVE INVESTORS.

                          ---------------------------

   The Securities and Exchange Commission (the "Commission") may take the view
that, under certain circumstances, the Selling Stockholders and any broker-
dealers or agents that participate with the Selling Stockholders in the
distribution of the Shares may be deemed to be "underwriters" within the
meaning of the Securities Act.  Commissions, discounts or concessions received
by any such broker-dealer or agent may be deemed to be underwriting commissions
under the Securities Act.  See "Plan of Distribution."

                          ---------------------------

       THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
          AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS
            THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
                  COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF
                     THIS PROSPECTUS.  ANY REPRESENTATION TO THE
                           CONTRARY IS A CRIMINAL OFFENSE.

                          ---------------------------

               THE DATE OF THIS PROSPECTUS IS               , 1998


<PAGE>


Information contained herein is subject to completion or amendment. A 
registration statement relating to these securities has been filed with the 
Securities and Exchange Commission.  These securities may not be sold nor may 
offers to buy be accepted prior to the time the registration statement 
becomes effective.  This prospectus shall not constitute an offer to sell or 
the solicitation of an offer to buy nor shall there be any sale of these 
securities in any State in which such offer, solicitation or sale would be 
unlawful prior to the registration or qualification under the securities laws 
of any such State.


<PAGE>

                                       
                             AVAILABLE INFORMATION

     The Company is subject to the informational requirements of the 
Securities Exchange Act of 1934, as amended (the "Exchange Act"), and in 
accordance therewith files reports, proxy and information statements and 
other information with the Commission. Such reports, proxy and information 
statements and other information may be inspected and copied at the public 
reference facilities maintained by the Commission at Room 1024, Judiciary 
Plaza, 450 Fifth Street, NW, Washington, D.C. 20549, and at the following 
Regional Offices of the Commission: New York Regional Office, Seven World 
Trade Center, 13th Floor, New York, New York 10048 and Chicago Regional 
Office, Northwest Atrium Center, 500 West Madison Street, Suite 1400, 
Chicago, Illinois 60661. Copies of such material may be obtained by mail at 
prescribed rates from the Public Reference Section of the Commission at 
Judiciary Plaza, 450 Fifth Street, NW, Washington, D.C. 20549.  The 
Commission maintains a Web site that contains reports, proxy and information 
statements and other information regarding registrants that file 
electronically with the Commission.  The address of the site is 
http://www.sec.gov.  The Common Stock of the Company is listed on the Nasdaq 
National Market, and such reports, proxy and information statements and other 
information concerning the Company may be inspected at the offices of Nasdaq 
Operations, 1735 K Street, NW, Washington, D.C. 20006.

     This Prospectus constitutes a part of a Registration Statement on Form 
S-3 (herein, together with all amendments and exhibits, referred to as the 
"Registration Statement") filed by the Company with the Commission under the 
Securities Act. This Prospectus does not contain all of the information set 
forth in the Registration Statement, certain parts of which are omitted in 
accordance with the rules and regulations of the Commission. For further 
information with respect to the Company and the shares of Common Stock 
offered hereby, reference is hereby made to the Registration Statement.  The 
Registration Statement may be inspected at the public reference facilities 
maintained by the Commission at the addresses set forth in the preceding 
paragraph.  Statements contained herein concerning any document filed as an 
exhibit are not necessarily complete and, in each instance, reference is made 
to the copy of such document filed as an exhibit to the Registration 
Statement. Each such statement is qualified in its entirety by such reference.
                                       
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The following documents filed with the Commission by the Company (File 
No. 0-20923) pursuant to the Exchange Act are hereby incorporated by 
reference in this Prospectus:

          (1)  The Company's Annual Report on Form 10-K for the year ended
               December 31, 1996;
          (2)  The Company's Quarterly Reports on Form 10-Q for the quarters
               ended March 31, 1997, June 30, 1997 and  September 30, 1997;
          (3)  The Company's Current Reports on Form 8-K, as amended, filed on
               March 14, 1997, July 28 1997, and September 24, 1997;
          (4)  The description of the Company's Common Stock contained in its
               Registration Statement on Form 8-A, filed with the Commission on
               October 9, 1996; and

     All reports and other documents subsequently filed by the Company 
pursuant to Section 13(a), 13(c), 14 or 15(d) of the Exchange Act after the 
date of this Prospectus and prior to the termination of this offering shall 
be deemed to be incorporated by reference into this Prospectus, to the extent 
required, and to be a part of this Prospectus from the date of filing of such 
reports and documents.

     Any statement contained in a document incorporated by reference into 
this Prospectus shall be deemed to be modified or superseded for purposes of 
this Prospectus to the extent that a statement contained herein or in any 
other subsequently filed document that also is or is deemed to be 
incorporated by reference herein modifies or supersedes such statement. Any 
statement so modified or superseded shall not be deemed, except as so 
modified or superseded, to constitute a part of this Prospectus.

     The Company hereby undertakes to provide without charge to each person, 
including any beneficial owner, to whom a copy of this Prospectus has been 
delivered, upon written or oral request of such person, a copy of any or all 
of the foregoing documents incorporated by reference into this Prospectus 
(other than exhibits to such documents, unless such exhibits are specifically 
incorporated by reference into such documents). Requests for such documents 
should be directed to Summit Design, Inc., 9305 S.W. Gemini Drive, Beaverton, 
Oregon 97008, Attention:  Investor Relations.  The Company's telephone number 
at that location is (503) 643-9281.

                                      -2-

<PAGE>

                                       
                                  THE COMPANY

     Summit is a leading provider of graphical design entry and verification 
software tools and design to test software tools.  The Company's products 
assist integrated circuit ("IC" or "chip") system, design and test engineers 
in meeting the market demands for rapid time to market, increased product 
functionality and lower product cost.  The Company's graphical Systems Level 
Design Automation ("SLDA") products enable IC system and design engineers to 
create and verify IC designs using familiar graphical paradigms such as block 
diagrams, state machines, flow charts or truth tables rather than the less 
intuitive textual hardware description language ("HDL") code required by 
synthesis and simulation tools.  The Company's SLDA products automatically 
generate optimized HDL descriptions from graphical designs, eliminating time 
consuming and error prone manual entry of HDL code.  The Company was 
incorporated in the State of Delaware on December 29, 1993.  The Company's 
principal executive offices are located at 9305 S.W. Gemini Drive, Beaverton, 
Oregon 97008, and its telephone number at that location is (503) 643-9281.

                           FORWARD-LOOKING STATEMENTS

     This Prospectus and the documents incorporated herein by reference 
contain forward-looking statements that are based on current expectations, 
estimates and projections about the Company's industry, management's beliefs, 
and assumptions made by management.  Words such as "anticipates," "expects," 
"intends," "plans," "believes," "seeks," and "estimates," and variations of 
such words and similar expressions are intended to identify such 
forward-looking statements.  These statements are not guarantees of future 
performance and are subject to certain risks, uncertainties and assumptions 
that are difficult to predict; therefore, actual results may differ 
materially from those expressed or forecasted in any such forward-looking 
statements.  Such risks and uncertainties include, in addition to those set 
forth herein under "Risk Factors," those noted in the documents incorporated 
herein by reference. The Company undertakes no obligation to update publicly 
any forward-looking statements, whether as a result of new information, 
future events or otherwise.

                                      -3-

<PAGE>

                                  RISK FACTORS

     THE SHARES OFFERED HEREBY ARE SPECULATIVE IN NATURE AND INVOLVE A HIGH 
DEGREE OF RISK.  THE FOLLOWING RISK FACTORS SHOULD BE CONSIDERED CAREFULLY IN 
ADDITION TO THE OTHER INFORMATION CONTAINED IN THE DOCUMENTS INCORPORATED BY 
REFERENCE HEREIN BEFORE PURCHASING THE COMMON STOCK OFFERED HEREBY:

POTENTIAL OPERATING LOSSES; FLUCTUATIONS IN QUARTERLY RESULTS

     While the Company has generated net income in prior quarters, there can 
be no assurance that the Company will be profitable in the future.  In 
addition, the Company has experienced significant quarterly fluctuations in 
operating results and cash flows and it is likely that these fluctuations 
will continue in future periods.  These fluctuations have been, and may in 
the future be, caused by a number of factors, including the rate of 
acceptance of new products, corporate acquisitions and consolidations, 
product, customer and channel mix, the size and timing of orders, lengthy 
sales cycles, the timing of new product announcements and introductions by 
the Company and its competitors, seasonal factors, rescheduling or 
cancellation of customer orders, the Company's ability to continue to develop 
and introduce new products and product enhancements on a timely basis, the 
level of competition, purchasing and payment patterns, pricing policies of 
the Company and its competitors, product quality issues, currency 
fluctuations and general economic conditions.

     The Company has generally recognized a substantial portion of its 
revenue in the last month of each quarter, with this revenue concentrated in 
the latter part of the month.  Any significant deferral of purchases of the 
Company's products could have a material adverse effect on the Company's 
business, financial condition and results of operations in any particular 
quarter, and to the extent that significant sales occur earlier than 
expected, operating results for subsequent quarters may be adversely 
affected.  The Company's revenue is difficult to forecast for several 
reasons.  The market for certain of the Company's software products is 
evolving.  The Company's sales cycle is typically six to nine months and 
varies substantially from customer to customer.  The Company operates with 
little product backlog because its products are typically shipped shortly 
after orders are received.  In addition, a significant portion of the 
Company's sales are made through indirect channels and can be harder to 
predict.  The Company establishes its expenditure levels for product 
development, sales and marketing and other operating activities based 
primarily on its expectations as to future revenue.  As a result, if revenue 
in any quarter falls below expectations, expenditure levels could be 
disproportionately high as a percentage of revenue, and the Company's 
operating results for that quarter would be adversely affected.  Based upon 
the factors described above, the Company believes that its quarterly revenue, 
expenses and operating results are likely to vary significantly in the 
future, that period-to-period comparisons of its results of operations are 
not necessarily meaningful and that, as a result, such comparisons should not 
be relied upon as indications of the Company's future performance.  Moreover, 
although the Company's revenue has increased in recent periods, there can be 
no assurance that the Company's revenue will grow in future periods or that 
the Company will remain profitable on a quarterly or annual basis.  Due to 
the foregoing or other factors, it is likely that the Company's results of 
operations may be below investors' and market analysts' expectations in some 
future quarters, which could have a severe adverse effect on the market price 
of the Company's Common Stock.

PRODUCT CONCENTRATION; UNCERTAINTY OF MARKET ACCEPTANCE OF SLDA

     Prior to July 1997, the Company's revenue was predominantly derived from 
two product lines, Visual HDL, which includes Visual HDL for VHDL and Visual 
HDL for Verilog, and Design to Test products, Test Development Series 
("TDS"). Effective July 1, 1997, as a result of a sale of assets to Credence 
Systems Corporation, TDS products ceased to be a source of revenue.  With the 
acquisition of TriQuest in February 1997 and Simulation Technologies Corp. 
("SimTech") in September 1997, the Company also derives revenue from 
verification products which include hardware-software co-verification, code 
coverage, and HDL debugging products as well as analysis, verification and 
register-transfer level ("RTL") optimization tools.

     The Company believes that SLDA products will continue to account for 
substantially all of its revenue in the future.  As a result, factors 
adversely affecting sales of these products, including increased competition, 
inability to successfully introduce enhanced or improved versions of these 
products, product quality issues and technological change, could have a 
material adverse effect on the Company's business, financial condition and 
results of operations.

     The Company's future success depends primarily upon the market 
acceptance of its existing and future SLDA products.  The Company 
commercially shipped its first SLDA product, Visual HDL for VHDL, in the 
first quarter of 1994.  For the three 

                                      -4-

<PAGE>

months and the nine months ended September 30, 1997 and for the years ended 
December 31, 1996, 1995 and 1994, respectively, revenue from SLDA products 
and related maintenance contracts represented 100%, 83.6%, 60.9%, 43.6% and 
34.8%, respectively, of the Company's total revenue.  The Company's SLDA 
products incorporate certain unique design methodologies and thus represent a 
departure from industry standards for design creation and verification.  The 
Company believes that broad market acceptance of its SLDA products will 
depend on several factors, including the ability to significantly enhance 
design productivity, ease of use, interoperability with existing electronic 
design automation ("EDA") tools, price and the customer's assessment of the 
Company's financial resources and its technical, managerial, service and 
support expertise.  The Company also depends on its distributors to assist 
the Company in gaining market acceptance of its products.  There can be no 
assurance that sufficient priority will be given by the Company's 
distributors to marketing the Company's products or whether such distributors 
will continue to offer the Company's products.  There can be no assurance 
that the Company's SLDA products will achieve broad market acceptance.  A 
decline in the demand for, or the failure to achieve broad market acceptance 
of, the Company's SLDA products will have a material adverse effect on the 
Company's business, financial condition and results of operations.

     Although demand for SLDA products has increased in recent years, the 
market for SLDA products is still emerging and there can be no assurance that 
it will continue to grow or that, even if the market does grow, businesses 
will continue to purchase the Company's SLDA products.  If the market for 
SLDA products fails to grow or grows more slowly than the Company currently 
anticipates, the Company's business, financial condition and results of 
operations would be materially adversely affected.

     Traditionally, EDA customers have been risk averse in accepting new 
design methodologies.  Because many of Summit's tools embody new design 
methodologies, this risk aversion on the part of potential customers presents 
an ongoing marketing and sales challenge to the Company and makes the 
introduction and acceptance of new products unpredictable.  The Company's 
Visual Testbench product, introduced in the fourth quarter of 1995, provides 
a new methodology and requires a change in the traditional design flow for 
creating IC test programs.  The Company anticipates a lengthy period of test 
marketing for the Visual Testbench product.  Accordingly, the Company cannot 
predict the extent, if any, to which it will realize revenue from Visual 
Testbench in excess of the revenue expected to be received pursuant to an OEM 
agreement entered into in July 1997.

COMPETITION

     The EDA industry is highly competitive and the Company expects 
competition to increase as other EDA companies introduce SLDA products.  In 
the SLDA market, the Company principally competes with Mentor Graphics and a 
number of smaller firms.  Indirectly, the Company also competes with other 
firms that offer alternatives to SLDA and could potentially offer more 
directly competitive products in the future.  Certain of these companies have 
significantly greater financial, technical and marketing resources and larger 
installed customer bases than the Company.  Some of the Company's current and 
future competitors offer a more complete range of EDA products and may 
distribute products that directly compete with the Company's SLDA products by 
bundling such products with their core product line.  In addition, the 
Company's products perform a variety of functions, certain of which are, and 
in the future may be, offered as separate products or discrete point 
solutions by the Company's existing and future competitors.  For example, 
certain companies currently offer design entry products without simulators.  
There can be no assurance that such competition will not cause the Company to 
offer point solutions instead of, or in addition to, the Company's current 
software products.  Such point solutions would be priced lower than the 
Company's current product offerings and could cause the Company's average 
selling prices to decrease, which could have a material adverse effect on the 
Company's business, financial condition and results of operations.

     The Company competes on the basis of certain factors including product 
capabilities, product performance, price, support of industry standards, ease 
of use, first to market and customer technical support and service.  The 
Company believes that it competes favorably overall with respect to these 
factors.  However, in particular cases, the Company's competitors may offer 
SLDA products with functionality which is sought by the Company's prospective 
customers and which differs from that offered by the Company.  In addition, 
certain competitors may achieve a marketing advantage by establishing formal 
alliances with other EDA vendors.  Further, the EDA industry in general has 
experienced significant consolidation in recent years, and the acquisition of 
one of the Company's competitors by a larger, more established EDA vendor 
could create a more significant competitor.  There can be no assurance that 
the Company will be able to compete successfully against current and future 
competitors or that competitive pressures faced by the Company will not have 
a material adverse effect on its business, financial condition and results of 
operations.  There can be no assurance that the Company's current and future 
competitors will not be able to develop products comparable or superior to 
those developed by the Company or to adapt more quickly than the Company 

                                      -5-

<PAGE>

to new technologies, evolving industry trends or customer requirements.  
Increased competition could result in price reductions, reduced margins and 
loss of market share, all of which could have a material adverse effect on 
the Company's business, financial condition and results of operations.

DEPENDENCE ON ELECTRONICS INDUSTRY MARKET

     Because the electronics industry is characterized by rapid technological 
change, short product life cycles, fluctuations in manufacturing capacity and 
pricing and margin pressures, certain segments, including the computer, 
semiconductor, semiconductor test equipment and telecommunications 
industries, have experienced sudden and unexpected economic downturns.  
During these periods, capital spending is commonly curtailed and the number 
of design projects often decreases.  Because the Company's sales are 
dependent upon capital spending trends and new design projects, negative 
factors affecting the electronics industry could have a material adverse 
effect on the Company's business, financial condition and results of 
operations.  A number of electronics companies, including customers of the 
Company, have recently experienced a slowdown in their businesses.  The 
Company's future operating results may reflect substantial fluctuations from 
period to period as a consequence of such industry patterns, general economic 
conditions affecting the timing of orders from customers and other factors.

DEPENDENCE ON THIRD PARTIES FOR PRODUCT INTEROPERABILITY

     Because the Company's products must interoperate with EDA products of 
other companies, particularly simulation and synthesis products, the Company 
must have timely access to third party software to perform development and 
testing of its products.  Although the Company has established relationships 
with a variety of EDA vendors to gain early access to new product 
information, these relationships may be terminated by either party with 
limited notice.  In addition, such relationships are with companies that are 
current or potential future competitors of the Company, including Synopsys, 
Mentor Graphics and Cadence.  If any of these relationships were terminated 
and the Company was unable to obtain, in a timely manner, information 
regarding modifications of third party products necessary for modifying its 
software products to interoperate with these third party products, the 
Company could experience a significant increase in development costs.  The 
development process would also take longer, and product introductions would 
be delayed.  The Company's business, financial condition and results of 
operations, consequently, could be materially adversely affected.

NEW PRODUCTS AND TECHNOLOGICAL CHANGE; EVOLVING INDUSTRY STANDARDS

     The EDA industry is characterized by extremely rapid technological 
change, frequent new product introductions and evolving industry standards.  
The introduction of products embodying new technologies and the emergence of 
new industry standards can render existing products obsolete and 
unmarketable.  In addition, customers in the EDA industry require software 
products that allow them to reduce time to market, differentiate their 
products, improve their engineering productivity and reduce their design 
errors.  The Company's future success will depend upon its ability to enhance 
its current products and develop and introduce new products that keep pace 
with technological developments and emerging industry standards and address 
the increasingly sophisticated needs of its customers.  There can be no 
assurance that the Company will be successful in developing and marketing 
product enhancements or new products that respond to technological change or 
emerging industry standards, that the Company will not experience 
difficulties that could delay or prevent the successful development, 
introduction and marketing of these products, or that its new products will 
adequately meet the requirements of the marketplace and achieve market 
acceptance.  If the Company is unable, for technological or other reasons, to 
develop and introduce products in a timely manner in response to changing 
market conditions, industry standards or other customer requirements, 
particularly if such product releases have been pre-announced, the Company's 
business, financial condition and results of operations will be materially 
adversely affected.

     Software products as complex as those offered by the Company may contain 
errors that may be detected at any point in the products' life cycles.  The 
Company has in the past discovered software errors in certain of its products 
and has experienced delays in shipment of products during the period required 
to correct these errors.  There can be no assurance that, despite testing by 
the Company and by current and potential customers, errors will not be found, 
resulting in loss of, or delay in, market acceptance and sales, diversion of 
development resources, injury to the Company's reputation or increased 
service and warranty costs, any of which could have a material adverse effect 
on the Company's business, financial condition and results of operations.

                                      -6-

<PAGE>

DEPENDENCE ON DISTRIBUTORS

     The Company relies on distributors for licensing and support of its 
products outside of North America.  Approximately 34%, 48%, 46%, 42% and 38% 
of the Company's revenue for the nine months ended September 30, 1997 and 
1996 and for the years ended December 31, 1996, 1995 and 1994, respectively, 
were attributable to sales made through distributors.  The Company has also 
entered into a joint venture with Anam S&T Co., Ltd. ("Anam") pursuant to 
which the joint venture corporation (Summit Design Korea, Inc. ("Summit 
Asia")) acquired exclusive rights to sell, distribute and support all of the 
Company's products in the Asia-Pacific region, excluding Japan.  Summit Asia 
has acted in such capacity since April 1, 1996.  Prior to that date, Anam was 
an independent distributor of the Company's products.  The Company is 
currently considering restructuring the ownership and responsibilities of 
Summit Asia. There can be no assurance that any restructuring would result in 
Summit Asia becoming profitable or that revenue attributable to sales in the 
Asia Pacific region, excluding Japan, would increase. During the first 
quarter of 1997, the Company entered into a distribution agreement with ATE 
Services Company, Ltd. ("ATE") pursuant to which ATE was granted exclusive 
rights to sell, distribute and support Summit's Visual Testbench products 
within Japan until October 1998, subject to the Company's ability to 
terminate the relationship if ATE fails to meet quarterly sales objectives.  
The agreement may also be terminated by either party for breach.  In 
addition, in the first quarter of 1996, the Company entered into a 
three-year, exclusive distribution agreement for its SLDA products in Japan 
with Seiko Instruments, Inc. ("Seiko").  In the event Seiko fails to meet 
specified quotas for two or more quarterly periods, exclusivity can be 
terminated by Summit, subject to Seiko's right to pay a specified fee to 
maintain exclusivity.  The agreement is renewable for successive five-year 
terms by mutual agreement of the Company and Seiko and is terminable by 
either party for breach.  In March 1997, the Company entered into a 
three-year distribution agreement with Kanematsu USA Inc. ("Kanematsu") which 
granted Kanematsu exclusive distribution rights to see, distribute and 
support certain verification products in Japan.  For the year ended December 
31, 1996 and nine months ended September 30,1997, all sales of the Company's 
products in the Asia-Pacific region were through Seiko, Summit Asia, ATE and 
Kanematsu. 

     There can be no assurance the relationships with Seiko, Summit Asia, ATE 
and Kanematsu will be effective in maintaining or increasing sales relative 
to the levels experienced prior to such relationships.  The Company also has 
independent distributors in Europe and is dependent on the continued 
viability and financial stability of its distributors.  Since the Company's 
products are used by skilled design engineers, distributors must possess 
sufficient technical, marketing and sales resources and must devote these 
resources to a lengthy sales cycle, customer training and product service and 
support.  Only a limited number of distributors possess these resources.  In 
addition, Seiko, Summit Asia, ATE and Kanematsu, as well as the Company's 
other distributors, may offer products of several different companies, 
including competitors of the Company.  There can be no assurance that the 
Company's current distributors will continue to market or service and support 
the Company's products effectively, that any distributor will continue to 
sell the Company's products or that the distributors will not devote greater 
resources to products of other companies.  The loss of, or a significant 
reduction in, revenue from the Company's distributors could have a material 
adverse effect on the Company's business, financial condition and results of 
operations.

INTERNATIONAL SALES AND OPERATIONS

     Approximately 24%, 37%, 50%, 52% and 39% of the Company's revenue for 
the three months and nine months ended September 30, 1997 and the years ended 
December 31, 1996, 1995 and 1994, respectively, were attributable to sales 
made outside the United States.  The decline in the percent of revenue from 
sales made outside the United States for the three and nine months ended 
September 30, 1997 is related primarily to domestic sales to one customer.  
The Company expects that international revenue will continue to represent a 
significant portion of its total revenue.  The Company's international 
revenue is currently denominated in U.S. dollars.  As a result, increases in 
the value of the U.S. dollar relative to foreign currencies could make the 
Company's products more expensive and, therefore, potentially less 
competitive in those markets.  The Company pays the expenses of its 
international operations in local currencies and does not engage in hedging 
transactions with respect to such obligations.  International sales and 
operations are subject to numerous risks, including tariff regulations and 
other trade barriers, requirements for licenses, particularly with respect to 
the export of certain technologies, collectability of accounts receivable, 
changes in regulatory requirements, difficulties in staffing and managing 
foreign operations and extended payment terms.  There can be no assurance 
that such factors will not have a material adverse effect on the Company's 
future international sales and operations and, consequently, on the Company's 
business, financial condition and results of operations. In addition, 
financial markets and economies in the Asia Pacific region have been 
experiencing adverse conditions which could adversely affect demand for the 
Company's products in such region.

     In order to successfully expand international sales, the Company may 
need to establish additional foreign operations, hire additional personnel 
and recruit additional international distributors.  This will require 
significant management attention and financial resources and could adversely 
affect the Company's operating margins.  In addition, to the extent that the 
Company is unable to effect these additions in a timely manner, the Company's 
growth, if any, in international sales will be limited.  There can be no 
assurance that the Company will be able to maintain or increase international 
sales of the Company's products, and failure to do so could have a material 
adverse effect on the Company's business, financial condition and results of 
operations.

                                       -7-

<PAGE>

MANAGEMENT OF GROWTH AND ACQUISITIONS

     Summit's ability to achieve significant growth will require it to 
implement and continually expand its operational and financial systems, 
recruit additional employees and train and manage current and future 
employees.  Summit expects that any such growth will place a significant 
strain on its operational resources and systems.  Failure to effectively 
manage any such growth would have a material adverse effect on Summit's 
business, financial condition and results of operations.

     On February 28, 1997, Summit completed its acquisition of TriQuest and 
on September 9, 1997, Summit completed its acquisition of SimTech.  As a 
result of these acquisitions, Summit's operating expenses are expected to 
increase. There can be no assurance that the integration of TriQuest's and 
SimTech's business can be successfully completed in a timely fashion, or at 
all, or that the revenues from TriQuest and SimTech will be sufficient to 
support the costs associated with the acquired businesses, without adversely 
affecting Summit's operating margins.  Any failure to successfully complete 
the integration in a timely fashion or to generate sufficient revenues from 
the acquired business could have a material adverse effect on Summit's 
business and results of operations.  In addition, Summit regularly evaluates 
acquisition opportunities. Future acquisitions by Summit could result in 
potentially dilutive issuances of equity securities, the incurring of debt 
and contingent liabilities and amortization expenses related to goodwill and 
other intangible assets, which could materially adversely affect Summit's 
results of operations.  Product and technology acquisitions entail numerous 
risks, including difficulties in the assimilation of acquired operations, 
technologies and products, diversion of management's attention to other 
business concern, risks of entering markets in which Summit has no or limited 
prior experience and potential loss of key employees of acquired companies.  
Summit's management has had limited experience in assimilating acquired 
organizations and products into Summit's operations.  No assurance can be 
given as to the ability of Summit to integrate successfully any operations, 
personnel or products that have been acquired or that might be acquired in 
the future, and the failure of Summit to do so could have a material adverse 
effect on Summit's results of operations.

OPERATIONS IN ISRAEL

     The Company's research and development operations related to its SLDA 
products are located in Israel and may be affected by economic, political and 
military conditions in that country.  Accordingly, the Company's business, 
financial condition and results of operations could be materially adversely 
affected if hostilities involving Israel should occur.  This risk is 
heightened due to the restrictions on the Company's ability to manufacture or 
transfer outside of Israel any technology developed under research and 
development grants from the government of Israel as described in "--Israeli 
Research, Development and Marketing Grants." In addition, while all of the 
Company's sales are denominated in U.S. dollars, a portion of the Company's 
annual costs and expenses in Israel are paid in Israeli currency.  These 
costs and expenses were approximately $4.3, $4.3 and $2.9 million in 1996, 
1995 and 1994, respectively. Payment in Israeli currency subjects the Company 
to foreign currency fluctuations and to economic pressures resulting from 
Israel's generally high rate of inflation, which has been approximately 11%, 
8% and 15% during 1996, 1995, and 1994, respectively.  The Company's primary 
expense which is paid in Israeli currency is employee salaries for research 
and development activities.  As a result, an increase in the value of Israeli 
currency in comparison to the U.S. dollar could increase the cost of research 
and development expenses and general and administrative expenses.  There can 
be no assurance that currency fluctuations, changes in the rate of inflation 
in Israel or any of the other aforementioned factors will not have a material 
adverse effect on the Company's business, financial condition or results of 
operations.  In addition, coordination with and management of the Israeli 
operations requires the Company to address differences in culture, 
regulations and time zones.  Failure to successfully address these 
differences could be disruptive to the Company's operations.

     The Company's Israeli production facility has been granted the status of 
an "Approved Enterprise" under the Israeli Investment Law for the 
Encouragement of Capital Investments, 1959 (the "Investment Law") . Taxable 
income of a company derived from an "Approved Enterprise" is eligible for 
certain tax benefits, including significant income tax rate reductions for up 
to seven years following the first year in which the "Approved Enterprise" 
has Israeli taxable income (after using any available net operating losses).  
The period of benefits cannot extend beyond 12 years from the year of 
commencement of operations or 14 years from the year in which approval was 
granted, whichever is earlier.  The tax benefits derived from a certificate 
of approval for an "Approved Enterprise" relate only to taxable income 
attributable to such "Approved Enterprise" and are conditioned upon 
fulfillment of the conditions stipulated by the Investment Law, the 
regulations promulgated thereunder and the criteria set forth in the 
certificate of approval.  In the event of a failure by the Company to comply 
with these conditions, the tax benefits could be canceled, in whole or in 
part, and the Company would be required to refund the amount of the canceled 
benefits, adjusted for inflation and interest. There can be no assurance that 
the Company's Israeli production facility will continue to 

                                      -8-

<PAGE>

operate or qualify as an "Approved Enterprise" or that the benefits under the 
"Approved Enterprise" regulations will continue, or be applicable, in the 
future.  The loss of, or any material decrease in, these income tax benefits 
could have a material adverse effect on the Company's business, financial 
condition and results of operations.

ISRAELI RESEARCH, DEVELOPMENT AND MARKETING GRANTS

     Summit's Israeli subsidiary has obtained research and development grants 
from the Office of the Chief Scientist (the "Chief Scientist") in the Israeli 
Ministry of Industry and Trade of approximately $232,000 and $608,000 in 1993 
and 1995, respectively.  As of September 30, 1997, the Company was obligated 
to pay back approximately $232,000 and $470,000 for the 1993 and 1995 grants, 
respectively.  Such obligations are collateralized by all tangible and 
intangible assets of the Israeli subsidiary.  The terms of the grants 
prohibit the manufacture of products developed under these grants outside of 
Israel and the transfer of the technology developed pursuant to these grants 
to any person, without the prior written consent of the Chief Scientist.  The 
Company's Visual HDL for VHDL products have been developed under grants from 
the Chief Scientist and thus are subject to these restrictions.  If the 
Company is unable to obtain the consent of the government of Israel, the 
Company would be unable to take advantage of potential economic benefits such 
as lower taxes, lower labor and other manufacturing costs and advanced 
research and development facilities that may be available if such technology 
and manufacturing operations could be transferred to locations outside of 
Israel.  In addition, the Company would be unable to minimize risks 
particular to operations in Israel, such as hostilities involving Israel.  
Although the Company is eligible to apply for additional grants from the 
Chief Scientist, it has no present plans to do so.  The Company also received 
a Marketing Fund Grant from the Israeli Ministry of Industry and Trade for an 
aggregate of $423,000.  The grant must be repaid at the rate of 3% of the 
increase in exports over the 1993 export level of all Israeli products, until 
repaid.  As of September 30, 1997, approximately $364,000 was outstanding 
under the grant.

DEPENDENCE ON KEY PERSONNEL

     The Company's future success depends in large part on the continued 
service of its key technical and management personnel and its ability to 
continue to attract and retain highly-skilled technical, sales and marketing 
and management personnel.  The Company has entered into employment agreements 
with certain of its executive officers, however, such agreements do not 
guarantee the services of these employees and do not contain noncompetition 
provisions.  Competition for personnel in the software industry in general, 
and the EDA industry in particular, is intense, and the Company has at times 
in the past experienced difficulty in recruiting qualified personnel.  There 
can be no assurance that the Company will retain its key personnel or that it 
will be successful in attracting and retaining other qualified technical, 
sales and marketing and management personnel in the future.  The loss of any 
key employees or the inability to attract and retain additional qualified 
personnel may have a material adverse effect on the Company's business, 
financial condition and results of operations.  The Company does not carry 
"key person" life insurance on any of its key personnel. The Company recently 
hired a new Vice President of Worldwide Marketing & Sales and several new 
sales persons. The Company's future success will depend in part on the 
ability of these new persons to rapidly and effectively transition into their 
new positions. Additions of new personnel and departures of existing 
personnel, particularly in key positions, can be disruptive and can result in 
departures of additional personnel, which could have a material adverse 
effect on the Company's business, financial condition and results of 
operations.

LIMITATIONS ON PROTECTION OF INTELLECTUAL PROPERTY AND PROPRIETARY RIGHTS

     The Company's success depends in part upon its proprietary technology. 
The Company relies on a combination of copyright, trademark and trade secret 
laws, confidentiality procedures, licensing arrangements and technical means 
to establish and protect its proprietary rights.  As part of its 
confidentiality procedures, the Company generally enters into non-disclosure 
agreements with its employees, distributors and corporate partners, and 
limits access to, and distribution of, its software, documentation and other 
proprietary information. In addition, the Company's products are protected by 
hardware locks and software encryption techniques designed to deter 
unauthorized use and copying. Despite these precautions, it may be possible 
for a third party to copy or otherwise obtain and use the Company's products 
or technology without authorization, or to develop similar technology 
independently.

     The Company provides its SLDA products to end-users primarily under 
"shrink-wrap" license agreements included within the packaged software.  In 
addition, the Company delivers certain of its verification products 
electronically under an electronic version of a "shrink-wrap" license 
agreement.  These "shrink-wrap" license agreements are not negotiated with or 
signed by the licensee, and thus may not be enforceable in certain 
jurisdictions.  In addition, the laws of some foreign countries 

                                      -9-

<PAGE>

do not protect the Company's proprietary rights as fully as do the laws of 
the United States. There can be no assurance that the Company's means of 
protecting its proprietary rights in the United States or abroad will be 
adequate or that competitors will not independently develop similar 
technology.

     The Company could be increasingly subject to infringement claims as the 
number of products and competitors in the Company's industry segment grows, 
the functionality of products in its industry segment overlaps and an 
increasing number of software patents are granted by the United States Patent 
and Trademark Office.  There can be no assurance that a third party will not 
claim such infringement by the Company with respect to current or future 
products. Any such claims, with or without merit, could be time-consuming, 
result in costly litigation, cause product delays or require the Company to 
enter into royalty or licensing agreements.  Such royalty or licensing 
agreements, if required, may not be available on terms acceptable to the 
Company or at all. Failure to protect its proprietary rights or claims of 
infringement could have a material adverse effect on the Company's business, 
financial condition and results of operations.

POSSIBLE VOLATILITY OF STOCK PRICE

     The stock markets have experienced price and volume fluctuations that 
have particularly affected technology companies, resulting in changes in the 
market prices of the stocks of many companies which may not have been 
directly related to the operating performance of those companies.  Such broad 
market fluctuations may adversely affect the market price of the Common 
Stock.  In addition, factors such as announcements of technological 
innovations or new products by the Company or its competitors, market 
conditions in the computer software or hardware industries and quarterly 
fluctuations in the Company's operating results may have a significant 
adverse effect on the market price of the Company's Common Stock.             

                                     -10-

<PAGE>
                                       
                               USE OF PROCEEDS

     The Company will not receive any of the proceeds from the sale from time 
to time of the Shares.  All proceeds from the sale of the Shares will be for 
the account of the Selling Stockholders, as described below.  See "Selling 
Stockholders" and "Plan of Distribution" described below.

                            SELLING STOCKHOLDERS

     The following table sets forth as of the date of this Prospectus, the 
name of each of the Selling Stockholders, the number of shares of Common 
Stock that each such Selling Stockholder beneficially owned as of such date, 
the number of shares of Common Stock owned by each Selling Stockholder that 
may be offered for sale from time to time by this Prospectus, and the number 
of shares of Common Stock to be held by each such Selling Stockholder 
assuming the sale of all the Common Stock offered hereby.  Except as 
indicated, none of the Selling Stockholders has held any position or office 
or had a material relationship with the Company or any of its affiliates 
within the past three years other than as a result of the ownership of the 
Company's Common Stock.  The Company may amend or supplement this Prospectus 
from time to time to update the disclosure set forth herein.

   
<TABLE>
<CAPTION>
                                                        Shares     Shares Which May     Shares Beneficially Owned
                                                     Beneficially be Sold Pursuant to      After Offering(3)
                                                                                        -------------------------
            Selling Stockholder                         Owned(1)   this Prospectus(2)   Number        Percent
- ------------------------------------------------     ------------ -------------------   ------        -------
<S>                                                  <C>          <C>                   <C>           <C>
Brian D. Alleyne................................           1,530          1,377            153              *
Barry Financial, LLC............................          29,102         26,192          2,910              *
Carl Otto Bruning III...........................           4,244          3,820            424              *
Benjamin Leonard and Theresa M. Butler..........           1,530          1,377            153              *
Stephen Butler(4)...............................          59,193         20,196         38,997              *
Sujata Chadha...................................             900            810             90              *
Herbert V. Criscito.............................          29,102         26,192          2,910              *
Ashwina and Hema A. Doshi.......................           1,474          1,327            147              *
Rajiv Dutta(5)..................................          16,626          5,345         11,281              *
Nancy D. Ege....................................           1,800          1,620            180              *
Tracy Fang(6)...................................             630            405            225              *
Dennis Favero...................................           6,001          5,401            600              *
Dennis V. and Christine Favero..................           6,601          5,941            660              *
Steve Fenstermaker(7)...........................             630            405            225              *
The Fluegel Trust...............................          58,882         52,994          5,888              *
Agnes M. and Smith M. George....................           3,600          3,240            360              *
David S. George.................................          28,004         23,165          4,839              *
Douglas Glader..................................           1,800          1,620            180              *
Martin J. and Gabrielle F. Goff.................           2,910          2,619            291              *
James J. Harrison...............................           7,275          6,548            727              *
Frederick and Sheila Hoar.......................             900            810             90              *
Christopher James...............................          12,002         10,802          1,200              *
David & Annette Jorgenson Revocable Trust.......          14,402         12,962          1,440              *
Shrikanth Kattemalalavadi.......................           1,800          1,620            180              *
Nand S. Kumar(8)................................          46,890         41,632          5,258              *
Sanjay Lall.....................................          14,551         13,096          1,455              *
Jeffrey L. and Kathryn R. Langner...............             900            810             90              *
Larry LeDoux....................................           3,000          2,700            300              *
Pravin K. Madhani...............................           3,812          3,562            250              *
The Marren Trust................................           9,001          8,101            900              *

</TABLE>
    
                                      -11-

<PAGE>

   
<TABLE>
<CAPTION>

                                                        Shares     Shares Which May     Shares Beneficially Owned
                                                     Beneficially be Sold Pursuant to      After Offering(3)
                                                                                        -------------------------
            Selling Stockholder                         Owned(1)   this Prospectus(2)   Number        Percent
- ------------------------------------------------     ------------ -------------------   ------        -------
<S>                                                  <C>          <C>                   <C>           <C>
Maura A. Murphy..................................            291            262             29              *
Patricia A. Murphy...............................            436            393             43              *
Petermeier Living Trust..........................          1,800          1,620            180              *
The Pickard Family Trust.........................         16,277         14,650          1,627              *
John Rizzi.......................................          2,355          2,120            235              *
Joseph D. and Elizabeth M. Rizzi Family Trust....         49,596         44,637          4,959              *
Jayanta Roy (9)..................................         62,270         45,557         16,713              *
Suzanne Rizzi....................................          2,355          2,120            235              *
Namrata Sajwan...................................          1,800          1,620            180              *
Ramprasad Shastry................................         12,025         10,823          1,202              *
Andrew T. Sheehan................................         14,582         13,124          1,458              *
Robyn Sherman....................................            120            108             12              *
Sururaj Singh....................................          1,260          1,134            126              *
Tarunraj Singh...................................            540            486             54              *
Roger V. Smith...................................         11,776         10,599          1,177              *
Vasu Subbiah.....................................            540            486             54              *
Sunrise Capital Fund I, LLC......................         18,003         16,203          1,800              *
Murli Mohan Thirumale............................          1,260          1,134            126              *
Thomas A. Thampy.................................          7,501          6,751            750              *
Tite Tolerance, Inc..............................          7,275          6,548            727              *
Jan Ho Van Schuyver..............................            900            810             90              *
Lawrence A. Vivolo...............................          2,350          2,115            235              *
Daryl Vorne......................................          1,800          1,620            180              *
Richard A. and Dianna S. Vorne...................          1,800          1,620            180              *
Mervyn P. Winston................................          2,355          2,120            235              *
Michael J. Yates.................................          120              108             12              *
                                                         -------        -------        -------        --------
           Total                                         590,479        475,457        115,022             --

</TABLE>
    
- ---------------------------------------
*  Indicates less than one percent.
(1)   The number and percentage of shares beneficially owned is determined in
      accordance with Rule 13d-3 of the Exchange Act, and the information is
      not necessarily indicative of beneficial ownership for any other purpose.
      Under such rule, beneficial ownership includes any shares as to which the
      individual has sole or shared voting power or investment power and also
      any shares which the individual has the right to acquire within 60 days
      of the date of this Prospectus through the exercise of any stock option
      or other right.  Unless otherwise indicated in the footnotes, each person
      has sole voting and investment power (or shares such powers with his or
      her spouse) with respect to the shares shown as beneficially owned.
   
(2)   Does not include 54,146 shares of Common Stock beneficially owned by the
      Selling Stockholders that are subject to an escrow pursuant to the
      Reorganization Agreement (the "Escrowed Shares").  Such escrow will
      expire on February 28, 1998 to the extent no claims on the escrow are
      outstanding.  A number of shares equivalent to the Escrowed Shares have
      been included in this Registration Statement, but they are not included
      in this column of the table.  An amended prospectus will be filed to
      reflect any change in the number of shares offered by the individual
      Selling Stockholders.
    
(3)   Assumes the sale of all Common Stock offered hereby.
(4)   Mr. Butler was the Company's Vice President, Business Development from
      February 28, 1997 to July 4, 1997.
(5)   Includes 8,688 shares issuable upon exercise of stock options as of 
      April 1, 1998.
(6)   Includes 180 shares issuable upon exercise of stock options as of 
      April 1, 1998.
(7)   Includes 180 shares issuable upon exercise of stock options as of 
      April 1, 1998.
(8)   Includes 5,251 shares issuable upon exercise of stock options as of 
      April 1, 1998 and 13,291 shares subject to repurchase by the Company.
   
(9)   Includes 11,652 shares issuable upon exercise of stock options as of 
      April 1, 1998 and 11,393 shares subject to repurchase by the Company.
    
                                     -12-

<PAGE>

                                    PLAN OF DISTRIBUTION

     The Shares covered by this Prospectus may be offered and sold from time 
to time by the Selling Stockholders or by their pledgees, donees, transferees 
or other successors in interest that receive such shares as a gift, 
partnership distribution or other non-sale related transfer. The Selling 
Stockholders will act independently of the Company in making decisions with 
respect to the timing, manner and size of each sale. The Selling Stockholders 
may sell the Shares being offered hereby on one or more exchanges, including 
the Nasdaq National Market, or in the over-the-counter market or otherwise, 
at prices and at terms then prevailing or at prices related to the then 
current market prices or in negotiated transactions.  The Shares may be sold 
by one or more of the following means of distribution:  (a) a block trade in 
which the broker-dealer so engaged will attempt to sell the shares as agent, 
but may position and resell a portion of the block as principal to facilitate 
the transaction; (b) purchases by a broker-dealer as principal and resale by 
such broker-dealer for its own account pursuant to this Prospectus; and (c) 
ordinary brokerage transactions and transactions in which the broker solicits 
purchasers.  This Prospectus may be amended and supplemented from time to 
time to describe a specific plan of distribution.  In connection with 
distributions of the Shares or otherwise, the Selling Stockholders may enter 
into hedging transactions with broker-dealers or other financial 
institutions.  In connection with such transactions, broker-dealers or other 
financial institutions may engage in short sales of the Company's Common 
Stock in the course of hedging the positions they assume with Selling 
Stockholders.  The Selling Stockholders may also sell the Company's Common 
Stock short and redeliver the shares to close out such short positions.  The 
Selling Stockholders may also enter into option or other transactions with 
broker-dealers or other financial institutions which require the delivery to 
such broker-dealer or other financial institution of the Common Stock offered 
hereby, which Common Stock such broker-dealer or other financial institution 
may resell pursuant to this Prospectus (as supplemented or amended to reflect 
such transaction).  The Selling Stockholders may also pledge the shares of 
Common Stock registered hereunder to a broker-dealer or other financial 
institution and, upon a default, such broker-dealer or other financial 
institution may effect sales of the pledged Common Stock pursuant to this 
Prospectus (as supplemented or amended to reflect such transaction).  In 
addition, any Shares that qualify for sale pursuant to Rule 144 may be sold 
under Rule 144 rather than pursuant to this Prospectus.

     In effecting sales, brokers, dealers or agents engaged by the Selling 
Stockholders may arrange for other brokers or dealers to participate.  
Brokers, dealers or agents may receive commissions, discounts or concessions 
from the Selling Stockholders in amounts to be negotiated prior to the sale.  
Such brokers or dealers and any other participating brokers or dealers may be 
deemed to be "underwriters" within the meaning of the Securities Act in 
connection with such sales, and any such commission, discount or concession 
may be deemed to be underwriting discounts or commissions under the 
Securities Act.  The Company will pay all expenses incident to the offering 
and sale of the Shares to the public other than any commissions and discounts 
of underwriters, dealers or agents and any transfer taxes.

     In order to comply with the securities laws of certain states, if 
applicable, the Common Stock will be sold in such jurisdictions only through 
registered or licensed brokers or dealers. In addition, in certain states the 
Shares may not be sold unless they have been registered or qualified for sale 
in the applicable state or an exemption from the registration or 
qualification requirement is available and is complied with.

     The Company has advised the Selling Stockholders that the 
anti-manipulation rules set forth in Regulation M under the Exchange Act may 
apply to sales of the Shares in the market and to the activities of the 
Selling Stockholders and its affiliates. In addition, the Company will make 
copies of this Prospectus available to the Selling Stockholders and has 
informed them of the need for delivery of copies of this Prospectus to 
purchasers at or prior to the time of any sale of the Shares offered hereby. 
The Selling Stockholders may indemnify any broker-dealer that participates in 
transactions involving the sale of the Shares against certain liabilities, 
including liabilities arising under the Securities Act.

     At the time a particular offer of the shares of Common Stock registered 
hereunder is made, if required, a Prospectus Supplement will be distributed 
that will set forth the number of shares being offered and the terms of the 
offering, including the name of any underwriter, dealer or agent, the 
purchase price paid by any underwriter, any discount, commission and other 
item constituting compensation, any discount, commission or concession 
allowed or reallowed or paid to any dealer, and the proposed selling price to 
the public.

     There can be no assurance that the Selling Stockholders will sell all or 
any of the Shares.

                                     -13-

<PAGE>

     The Company has agreed with the Selling Stockholders to keep the 
Registration Statement of which this Prospectus constitutes a part effective 
for the earlier of (i) such time as all of the Shares can be sold by the 
Selling Stockholders in a three-month period in accordance with Rule 144 or 
(ii) two years following February 28, 1997, the effective date of the 
TriQuest Merger.  The Company intends to de-register any of the Shares not 
sold by the Selling Stockholders at the end of such period; however, at such 
time, any unsold shares may be freely tradable subject to compliance with 
Rule 144 of the Securities Act.
                                       
                                LEGAL MATTERS

     The validity of the shares of Common Stock offered hereby will be passed 
upon by Wilson Sonsini Goodrich & Rosati, Professional Corporation, Palo 
Alto, California, counsel to the Company.

                                    EXPERTS

     The financial statements and financial statement schedule for the 
companies listed below and incorporated by reference in this Prospectus have 
been incorporated herein in reliance on the reports of Coopers & Lybrand 
L.L.P., independent accountants, given on the authority of that firm as 
experts in accounting and auditing:

     (a)  Consolidated balance sheets of Summit Design, Inc. and 
          subsidiaries, as of December 31, 1995 and 1996 and the consolidated 
          statements of operations, stockholders' equity and cash flows for 
          each of the three years in the period ended December 31, 1996 and 
          the related financial statement schedule;

     (b)  Balance sheets of TriQuest Design Automation, Inc. as of December 
          31, 1995 and 1996 and the statements of operations, stockholders' 
          equity and cash flows for the period from inception, February 15, 
          1995, to December 31, 1995, and the year ended December 31, 1996.

     (c)  Balance sheets of Simulation Technologies Corp. as of December 31, 
          1995 and 1996 and June 30, 1997 and the statements of income, 
          stockholders' equity and cash flows for each of the two years in 
          the period ended December 31, 1996 and the six months ended June 
          30, 1997.


                                      -14-

<PAGE>

- ------------------------------------------------------------------------------ 
- ------------------------------------------------------------------------------ 
    NO PERSON IS AUTHORIZED IN CONNECTION WITH ANY OFFERING MADE BY THIS 
PROSPECTUS TO GIVE ANY INFORMATION OR TO MAKE ANY REPRESENTATIONS NOT 
CONTAINED IN THIS PROSPECTUS, AND, IF GIVEN OR MADE, SUCH INFORMATION OR 
REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED BY THE 
COMPANY, ANY SELLING STOCKHOLDER OR BY ANY OTHER PERSON.  THIS PROSPECTUS 
DOES NOT CONSTITUTE AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY ANY 
SECURITY OTHER THAN THE SHARES OFFERED HEREBY, NOR DOES IT CONSTITUTE AN 
OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY ANY OF THE SHARES OFFERED 
HEREBY TO ANY PERSON IN ANY JURISDICTION IN WHICH IT IS UNLAWFUL TO MAKE SUCH 
AN OFFER OR SOLICITATION. NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY 
SALE OF OR OFFER TO SELL THE SHARES MADE HEREUNDER SHALL UNDER ANY 
CIRCUMSTANCES CREATE ANY IMPLICATION THAT THERE HAS BEEN NO CHANGE IN THE 
AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF OR THAT THE INFORMATION 
CONTAINED HEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO THE DATE HEREOF.

      ----------------------------------------------------------

                           TABLE OF CONTENTS

                                                           PAGE
                                                           ----
Available Information.................................      2
Incorporation of Certain
  Documents By Reference..............................      2
The Company...........................................      3
Forward-Looking Statements............................      3
Risk Factors..........................................      4
Use Of Proceeds.......................................     11
Selling Stockholders..................................     11
Plan of Distribution..................................     13
Legal Matters.........................................     14
Experts...............................................     14

- ------------------------------------------------------------------------------ 
- ------------------------------------------------------------------------------ 


- ------------------------------------------------------------------------------ 
- ------------------------------------------------------------------------------ 

                             SUMMIT DESIGN, INC.




   
                               529,603 SHARES
    
                                     OF

                                COMMON STOCK





                           ----------------------

                                 PROSPECTUS

                           ----------------------








                           _________________, 1998

- ------------------------------------------------------------------------------ 
- ------------------------------------------------------------------------------ 


<PAGE>

                                          PART II

                         INFORMATION NOT REQUIRED IN THE PROSPECTUS


ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

     The Company will bear no expenses in connection with any sale or other
distribution by the Selling Stockholders of the shares being registered other
than the expenses of preparation and filing of this Registration Statement and
the Prospectus included in this Registration Statement. Such expenses are set
forth in the following table. All of the amounts shown are estimates except the
Securities and Exchange Commission ("SEC") registration fee.

   
 SEC registration fee.......................................  $  1,550
 Legal fees and expenses....................................     8,000
 Accounting fees and expenses...............................     7,500
 Miscellaneous expenses.....................................  --------
 Total....................................................... $ 17,050
                                                              --------
                                                              --------
    

ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

     The Company's Amended and Restated Certificate of Incorporation limits the
liability of directors to the maximum extent permitted by Delaware law.
Delaware law provides that a corporation's certificate of incorporation may
contain a provision eliminating or limiting the personal liability of a
director for monetary damages for breach of their fiduciary duties as
directors, except for liability (i) for any breach of their 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) for unlawful payments of dividends or unlawful stock repurchases or
redemptions as provided in Section 174 of the Delaware General Corporation Law
or (iv) for any transaction from which the director derived an improper
personal benefit.

     The Company's Amended and Restated Bylaws provide that the Company shall
indemnify its directors and officers and may indemnify its employees and agents
to the fullest extent permitted by law.  The Company believes that
indemnification under its Amended and Restated Bylaws covers at least
negligence and gross negligence on the part of indemnified parties.

     The Company has entered into agreements to indemnify its directors and
officers in addition to the indemnification provided for in the Company's
Amended and Restated Bylaws.  These agreements, among other things, indemnify
the Company's directors and officers for certain expenses (including attorney's
fees), judgments, fines and settlement amounts incurred by any such person in
any action or proceeding, including any action by or in the right of the
Company, arising out of such person's services as a director or officer of the
Company, any subsidiary of the Company or any other company or enterprise to
which the person provides services at the request of the Company.

     The Company has obtained directors and officers insurance providing
indemnification for certain of the Company's directors, officers, affiliates,
partners or employees for certain liabilities.


ITEM 16.  EXHIBITS.

    2.1   Agreement and Plan of Reorganization dated as of February 17, 1997
          (INCORPORATED HEREIN BY REFERENCE TO EXHIBIT 2.1 TO THE REGISTRANT'S
          CURRENT REPORT ON FORM 8-K FILED MARCH 14, 1997).
    5.1   Opinion of Wilson Sonsini Goodrich & Rosati, Professional
          Corporation.
    23.1  Consent of Independent Accountants.
    23.2  Consent of Counsel (included in Exhibit 5.1).
   
    24.1* Power of Attorney.

- ------
*Previously filed with the initial filing of this Registration Statement.
    
                                     II-1

<PAGE>

ITEM 17.  UNDERTAKINGS.

A.   UNDERTAKING PURSUANT TO RULE 415.

     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)
               Securities Act of 1933 (the "Securities Act");

         (ii)  to reflect in the prospectus any facts or events
               arising after the effective date of the 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 the Registration Statement.
               Notwithstanding the foregoing, any increase or decrease in
               volume of securities offered (if the total dollar value of
               securities offered would not exceed that which was registered)
               and any deviation from the low or high end of the estimated
               maximum offering range may be reflected in the form of
               prospectus filed with the Commission pursuant to Rule 424(b) if,
               in the aggregate, the changes in volume and price represent no
               more than a 20% change in the maximum aggregate offering price
               set forth in the "Calculation of Registration Fee" table in the
               effective Registration Statement.

       (iii)   to include any material information with respect to the plan of
               distribution not previously disclosed in the Registration
               Statement or any material change to such information in the
               Registration Statement;

          provided, however, that paragraphs A(l)(i) and A(l)(ii) do not apply
if the information required to be included in a post-effective amendment by
those paragraphs is contained in periodic reports filed by the Registrant
pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934
(the "Exchange Act") that are incorporated by reference in the Registration
Statement;

     (2)  That, for the purpose of determining any liability under the
Securities 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 at the termination
of this offering.

B.   UNDERTAKING REGARDING FILINGS INCORPORATING SUBSEQUENT EXCHANGE ACT
     DOCUMENTS BY REFERENCE.

     The undersigned Registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act, each filing of the
Registrant's annual report pursuant to Section 13(a) or Section 15(d) of the
Exchange Act (and, where applicable, each filing of an employee benefit plan's
annual report pursuant to Section 15(d) of the Exchange Act) that is
incorporated by reference in the 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.   UNDERTAKING IN RESPECT OF INDEMNIFICATION.

     Insofar as indemnification for liabilities arising under the Securities
Act may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that in the opinion of the Commission such indemnification is
against public policy as expressed in the Securities 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 


                                     II-2

<PAGE>

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 Securities Act and will be governed by the 
final adjudication of such issue.

                                     II-3

<PAGE>

                                  SIGNATURES

   
     Pursuant to the requirements of the Securities Act of 1933, the 
Registrant certifies that it has duly caused this Amendment to the 
Registration Statement on Form S-3 to be signed on its behalf by the 
undersigned, thereunto duly authorized, in the City of Beaverton, State of 
Oregon, on this 29th day of January 1998.
    
                                   SUMMIT DESIGN, INC.

                                   By:   /s/  Larry J. Gerhard
                                      ----------------------------------------
                                          Larry J. Gerhard
                                          President and Chief Executive Officer


   
     Pursuant to the requirements of the Securities Act of 1933, this 
Amendment to the Registration Statement has been signed below by the 
following persons on the 29th day of January 1998 in the capacities indicated.

        SIGNATURE                                  TITLE
- -------------------------    -------------------------------------------------


  /s/ Larry J. Gerhard       Chairman of the Board, President and Chief
- -------------------------    Executive Officer (PRINCIPAL EXECUTIVE OFFICER)
      Larry J. Gerhard  


  /s/  C. Albert Koob        Vice President, Finance, Chief Financial Officer 
- -------------------------    and Secretary (PRINCIPAL FINANCIAL AND 
       C. Albert Koob        ACCOUNTING OFFICER)
 

             *               Director
- -------------------------
       Amihai Ben-David


             *               Director
- -------------------------    
       William V. Botts


             *               Director
- -------------------------    
       Steven P. Erwin


             *               Director
- -------------------------    
       Barbara M. Karmel


* By:  /s/ Larry J. Gerhard
       ---------------------
           Larry J. Gerhard
           Attorney-in-Fact
    
                                     II-4

<PAGE>


                             INDEX TO EXHIBITS
                             -----------------


Exhibit
 Number                         Description
- --------   --------------------------------------------------------------------
   2.1     Agreement and Plan of Reorganization dated as of February 28, 1997
           (INCORPORATED HEREIN BY REFERENCE TO EXHIBIT 2.1 TO THE REGISTRANT'S
           CURRENT REPORT ON FORM 8-K FILED FEBRUARY 21, 1997).

   5.1     Opinion of Wilson Sonsini Goodrich & Rosati, Professional 
           Corporation.

  23.1     Consent of Independent Accountants.

  23.2     Consent of Counsel (included in Exhibit 5.1).

   
  24.1*    Power of Attorney.

- ------
*Previously filed with the initial filing of this Registration Statement.
    




<PAGE>









                                                                   EXHIBIT 5.1

                             January 29, 1998



Summit Design, Inc.
9305 S.W. Gemini Drive
Beaverton, Oregon 97008

     Re:  Registration Statement on Form S-3

Ladies and Gentlemen:

     We have examined the Registration Statement on Form S-3 filed by you 
with the Securities and Exchange Commission on January 9, 1998 (Registration 
No. 333-44003), as amended (the "Registration Statement") in connection with 
the registration for resale under the Securities Act of 1933, as amended, of 
up to 529,603 previously issued and outstanding shares of your Common Stock 
(the "Shares").  As your legal counsel, we have also reviewed the proceedings 
taken by you in connection with the issuance of the Shares.  

     It is our opinion that the Shares are validly issued, fully-paid and 
non-assessable.

     We consent to the use of this opinion as an exhibit to the Registration
Statement and further consent to the use of our name wherever appearing in the
Registration Statement, including the Prospectus constituting a part thereof,
and any amendments thereto.  

                              Very truly yours,

                              WILSON SONSINI GOODRICH & ROSATI
                              Professional Corporation


                              /s/ Wilson Sonsini Goodrich & Rosati

<PAGE>
                                                                  EXHIBIT 23.1


                          CONSENT OF INDEPENDENT ACCOUNTANTS


     We consent to the incorporation by reference in this Registration 
Statement of Summit Design, Inc. on Form S-3 (i) of our report dated August 
21, 1997 on our audits of the financial statements of Simulation 
Technologies, Corp. as of December 31, 1995 and 1996 and June 30, 1997 and 
for each of the two years in the period ended December 31, 1996 and the six 
months ended June 30, 1997, which report is included in the Current Report on 
Form 8-K dated September 9, 1997, (ii) of our report dated February 20, 1997 
on our audits of the financial statements of TriQuest Design Automation, 
Inc., as of December 31, 1995 and 1996 and for the period from inception, 
February 15, 1995, to December 31, 1995, and for the year ended December 31, 
1996, which report is included in the Current Report on Form 8-K dated 
February 28, 1997 and (iii) of our report dated January 24, 1997, except for 
Note 14, for which the date is February 28, 1997, on our audits of the 
consolidated financial statements and financial statement schedule of Summit 
Design, Inc., and its subsidiaries as of December 31, 1995 and 1996 and for 
each of the three years in the period ended December 31, 1996, which report 
is included in the Annual Report on Form 10-K for the year ended December 31, 
1996.

     We also consent to the reference to our firm under the caption "Experts".


                                        /s/ COOPERS & LYBRAND L.L.P.



Portland, Oregon
January 29, 1998


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission