ARTERIAL VASCULAR ENGINEERING INC
8-K, 1997-02-27
SURGICAL & MEDICAL INSTRUMENTS & APPARATUS
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                       SECURITIES EXCHANGE AND COMMISSION


                             Washington, D. C. 20549


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


                                    FORM 8-K


                                 CURRENT REPORT

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


                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


                                 Date of Report
              (Date of earliest event reported): February 25, 1997


                       ARTERIAL VASCULAR ENGINEERING, INC.
             ------------------------------------------------------
             (Exact name of registrant as specified in its charter)


                  Delaware                           0-27802        
           ----------------------            -----------------------
          (State of Incorporation)           (Commission File Number)  

                                   94-3144218
                       ---------------------------------
                       (IRS Employer Identification No.)


  3576 Unocal Place, Santa Rosa, California                      95403
  -----------------------------------------                   ----------
  (Address of principal executive offices)                    (Zip Code)


                                 (707) 525-0111
              ----------------------------------------------------
              (Registrant's telephone number, including area code)


<PAGE>

ITEM 5.           OTHER EVENTS.

                  On  February  25,  1997 the  Board of  Directors  of  Arterial
Vascular  Engineering,  Inc.  (the  "Company")  approved the adoption of a Share
Purchase  Rights  Plan (the  "Plan").  Terms of the Plan  provide for a dividend
distribution  of one  preferred  share  purchase  right  (a  "Right")  for  each
outstanding  share of common  stock,  par value  $.001  per share  (the  "Common
Shares"), of the Company. The dividend is payable on March 21, 1997 (the "Record
Date") to the  stockholders  of record on that  date.  Each Right  entitles  the
registered  holder to purchase from the Company one  one-hundredth of a share of
Series A Junior  Participating  Preferred  Stock, par value $.001 per share (the
"Preferred  Stock"),  at a price of $75.00 per one  one-hundredth of a Preferred
Share (the "Purchase Price"), subject to adjustment. Each one one-hundredth of a
share of  Preferred  Stock has  designations  and the  powers,  preferences  and
rights,  and the  qualifications,  limitations and  restrictions  which make its
value  approximately  equal to the value of a Common Share.  The description and
terms  of  the  Rights  are  set  forth  in  a  Rights  Agreement  (the  "Rights
Agreement"),  entered into between the Company and First National Bank of Boston
as Rights Agent (the "Rights Agent").

                  Initially,   the  Rights  will  be   evidenced  by  the  stock
certificates  representing the Common Shares then  outstanding,  and no separate
Right  Certificates,  as defined  in the Plan,  will be  distributed.  Until the
earlier  to occur of (i)  immediately  following  a public  announcement  that a
person,  entity or group of  affiliated  or  associated  persons (an  "Acquiring
Person") have acquired  beneficial  ownership of 15% or more of the  outstanding
Common  Shares or (ii) 10 business days (or such later date as may be determined
by action of the Board of  Directors  prior to such time as any person or entity
becomes an Acquiring  Person)  following the commencement of, or announcement of
an intention to make, a tender offer or exchange offer the consummation of which
would result in the beneficial  ownership by a person or group of 15% or more of
such  outstanding  Common  Shares (the  earlier of such dates  being  called the
"Distribution  Date"), the Rights will be evidenced,  with respect to any of the
Common Share  certificates  outstanding  as of the Record  Date,  by such Common
Share  certificate  with or without a copy of the  Summary  of Rights,  which is
included in the Rights Agreement as Exhibit C thereof (the "Summary of Rights").

                  Until the  Distribution  Date,  the Rights will be transferred
with and only with the Common Shares.  Until the  Distribution  Date (or earlier
redemption or expiration of the Rights),  new Common Share  certificates  issued
after the Record  Date,  upon  transfer or new issuance of Common  Shares,  will
contain a notation  incorporating  the Rights Agreement by reference.  Until the
Distribution  Date (or earlier  redemption  or  expiration  of the Rights),  the
surrender or transfer of any  certificates  for Common Shares  outstanding as of
the Record Date,  even without such  notation or a copy of the Summary of Rights
being  attached  thereto,  will  also  constitute  the  transfer  of the  Rights
associated with the Common Shares  represented by such  certificate.  As soon as
practicable  following the Distribution Date, separate  certificates  evidencing
the  Rights  ("Right  Certificates")  will be mailed to holders of record of 



                                       1.
<PAGE>

the Common Shares as of the close of business on the Distribution  Date and such
separate Right Certificates alone will evidence the Rights.

                  The Rights are not exercisable  until the  Distribution  Date.
The Rights will expire on March 21, 2007 (the "Final Expiration  Date"),  unless
the Final  Expiration Date is extended or unless the Rights are earlier redeemed
by the Company, in each case, as described below.

                  The Purchase Price payable, and the number of Preferred Shares
or other  securities  or  property  issuable,  upon  exercise  of the Rights are
subject to adjustment from time to time to prevent  dilution (i) in the event of
a stock dividend on, or a subdivision,  combination or reclassification  of, the
Preferred  Shares,  (ii) upon the grant to  holders of the  Preferred  Shares of
certain  rights or warrants to subscribe for or purchase  Preferred  Shares at a
price, or securities  convertible into Preferred Shares with a conversion price,
less than the then current  market price of the  Preferred  Shares or (iii) upon
the distribution to holders of the Preferred Shares of evidences of indebtedness
or assets  (excluding  regular  periodic cash  dividends paid out of earnings or
retained  earnings or dividends  payable in Preferred Shares) or of subscription
rights or warrants (other than those referred to above).  The exercise of Rights
for Preferred Shares is at all times subject to the availability of a sufficient
number of authorized but unissued Preferred Shares. With certain exceptions,  no
adjustment in the Purchase Price will be required until  cumulative  adjustments
require an  adjustment  of at least 1% in such  Purchase  Price.  No  fractional
Preferred  Shares  will be issued  (other  than  fractions  which  are  integral
multiples of the number of one one-hundredths of a Preferred Share issuable upon
the exercise of one Right, which may, at the option of the Company, be evidenced
by depositary receipts), and in lieu thereof, an adjustment in cash will be made
based on the market price of the Preferred  Shares on the last trading day prior
to the date of exercise.

                  The  number  of  outstanding  Rights  and  the  number  of one
one-hundredths  of a Preferred  Share  issuable  upon exercise of each Right are
also subject to adjustment in the event of a stock split of the Common Shares or
a stock dividend on the Common Shares payable in Common Shares or  subdivisions,
consolidation or combinations of the Common Shares occurring, in any case, prior
to the Distribution Date.

                  Preferred Shares  purchasable upon exercise of the Rights will
not  be  redeemable.  Each  Preferred  Share  will  be  entitled  to  a  minimum
preferential  quarterly  dividend  payment of $1.00 but will be  entitled  to an
aggregate  dividend of 100 times the dividend  declared per Common Share. In the
event of liquidation,  the holders of the Preferred Shares will be entitled to a
minimum  preferential  liquidation  payment of $100 but will be  entitled  to an
aggregate payment of 100 times the payment made per Common Share. Each Preferred
Share will have 100 votes,  voting together with the Common Shares.  Finally, in
the event of any merger,  consolidation  or other  transaction  in which  Common
Shares are 


                                       2.
<PAGE>

exchanged, each Preferred Share will be entitled to receive 100 times the amount
of  consideration  received  per Common  Share.  These  rights are  protected by
customary  anti-dilution  provisions.  Because  of the  nature of the  Preferred
Shares'  dividend and liquidation  rights,  the value of one  one-hundredth of a
Preferred Share should approximate the value of one Common Share.

                  In the event that any  person  becomes  an  Acquiring  Person,
proper provision shall be made so that each holder of a Right, other than Rights
beneficially owned by the Acquiring Person (which will thereafter be void), will
for a 60-day  period  have the right to receive  upon  exercise  that  number of
Common Shares having a market value of two times the exercise price of the Right
(or, if such number of shares is not and cannot be  authorized,  the Company may
issue Preferred Stock,  cash,  debt, stock or a combination  thereof in exchange
for the Rights).  This right will  terminate 60 days after the date on which the
Rights become nonredeemable (as described below),  unless there is an injunction
or similar  obstacle to  exercise of the Rights,  in which event this right will
terminate 60 days after the date on which the Rights again become exercisable.

                  In the event that the Company is acquired in a merger or other
business  combination  transaction or 50% or more of its consolidated  assets or
earning power are sold,  proper  provision will be made so that each holder of a
Right will  thereafter have the right to receive,  upon the exercise  thereof at
the then current  exercise  price of the Right,  that number of shares of common
stock of the acquiring company which at the time of such transaction will have a
market value of two times the exercise price of the Right.

                  At any time  after  the  acquisition  by a person  or group of
affiliated or associated  persons of beneficial  ownership of 15% or more of the
outstanding  Common Shares and prior to the  acquisition by such person or group
of 50% or more of the outstanding  Common Shares,  the Board of Directors of the
Company may exchange the Rights (other than Rights owned by such person or group
which have become void), in whole or in part, at an exchange ratio of one Common
Share, or one  one-hundredth  of a Preferred Share, per Right (or, if the number
of shares is not and cannot be authorized,  the Company may issue cash,  debt or
equity  securities,  property  or a  combination  thereof  in  exchange  for the
Rights), subject to adjustment.

                  At any time prior to the earliest of (i) the close of business
the day of the first public  announcement  that a person has become an Acquiring
Person or (ii) the Final  Expiration Date, the Board of Directors of the Company
may redeem the Rights in whole,  but not in part,  at a price of $.001 per Right
(the "Redemption  Price").  However,  in the event that there is a change in the
membership  of the Board of  Directors  such that a majority  of the Board is no
longer  comprised  of the  current  directors  and such other  directors  as are
approved  by a majority of the board  comprised  of the  current  directors  and
approved directors, no such redemption may be made for 180 days from such change
in the majority of the Board. 



                                       3.
<PAGE>

Following the expiration of the above periods, the Rights become  nonredeemable.
Immediately upon any redemption of the Rights,  the right to exercise the Rights
will  terminate  and the only right of the  holders of Rights will be to receive
the Redemption Price.

                  The  terms  of the  Rights  may be  amended  by the  Board  of
Directors  of the  Company  without  the  consent of the  holders of the Rights,
except that from and after such time as any person  becomes an Acquiring  Person
no such  amendment  may  adversely  affect the  interest  of the  holders of the
Rights.

                  Until a Right is exercised,  the holder thereof, as such, will
have no rights as a stockholder of the Company,  including,  without limitation,
the right to vote or to receive dividends.

                  The Rights have certain anti-takeover effects. The Rights will
cause  substantial  dilution  to a person or group that  attempts to acquire the
Company on terms not approved by the Company's  Board of  Directors.  The Rights
should not interfere with any merger or other business  combination  approved by
the Board of Directors since, subject to certain limitations,  the Rights may be
redeemed by the Company at $.001 per Right prior to the earliest of (i) the date
of the first public  announcement that a person or group has acquired beneficial
ownership  of 15% or more of the  Company's  Common  Stock  or  (ii)  the  Final
Expiration Date of the rights.

ITEM 7.           EXHIBITS.

1.                Rights  Agreement dated as of February 26, 1997 by and between
                  Arterial  Vascular  Engineering and the First National Bank of
                  Boston.

2.                Certificate of  Designation  of Series A Junior  Participating
                  Preferred Stock of Arterial Vascular Engineering, Inc.

3.                Press  Release,   dated  as  of  February  26,  1997  entitled
                  "Arterial Vascular Engineering Adopts Preferred Share Purchase
                  Rights Plan."





                                       4.
<PAGE>
                                    SIGNATURE



                  Pursuant to the requirements of the Securities Exchange Act of
1934,  the  registrant has duly caused this report to be signed on its behalf by
the undersigned, thereunto duly authorized.



                                  ARTERIAL VASCULAR ENGINEERING, INC.



Dated:  February  27, 1997        By:  /s/ Bradly A. Jendersee
                                      ------------------------------------------
                                           Bradly A. Jendersee
                                           President and Chief Executive Officer



                                       5.
<PAGE>

                                INDEX TO EXHIBITS



1.       Rights  Agreement dated as of February 26, 1997 by and between Arterial
         Vascular Engineering and the First National Bank of Boston.

2.       Certificate of Designation of Series A Junior  Participating  Preferred
         Stock of Arterial Vascular Engineering, Inc.

3.       Press  Release,  dated  February 26, 1997 entitled  "Arterial  Vascular
         Engineering Adopts Preferred Share Purchase Rights Plan."



                                       7.


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

                       ARTERIAL VASCULAR ENGINEERING, INC.

                                       AND

                        THE FIRST NATIONAL BANK OF BOSTON

                                RIGHTS AGREEMENT

                          DATED AS OF FEBRUARY 26, 1997

           -----------------------------------------------------------
<PAGE>


<TABLE>
                                TABLE OF CONTENTS

<CAPTION>
                                                                                            Page
<S>         <C>                                                                               <C>
Section 1.  Certain Definitions.............................................................. 1.

Section 2.  Appointment of Rights Agent...................................................... 4.

Section 3.  Issue of Right Certificates...................................................... 4.

Section 4.  Form of Right Certificates....................................................... 6.

Section 5.  Countersignature and Registration................................................ 7.

Section 6.  Transfer, Split Up, Combination and Exchange of Right Certificates;
      Mutilated, Destroyed, Lost or Stolen Right Certificates................................ 7.

Section 7.  Exercise of Rights; Purchase Price; Expiration Date of Rights.................... 8.

Section 8.  Cancellation and Destruction of Right Certificates............................... 9.

Section 9.  Availability of Preferred Shares.................................................10.

Section 10.  Preferred Shares Record Date....................................................11.

Section 11.  Adjustment of Purchase Price, Number of Shares or Number of
      Rights.................................................................................11.

Section 12.  Certificate of Adjusted Purchase Price or Number of Shares......................18.

Section 13.  Consolidation, Merger or Sale or Transfer of Assets or Earning
      Power..................................................................................18.

Section 14.  Fractional Rights and Fractional Shares.........................................21.

Section 15.  Rights of Action................................................................22.

Section 16.  Agreement of Right Holders......................................................22.

Section 17.  Right Certificate Holder Not Deemed a Stockholder...............................23.

Section 18.  Concerning the Rights Agent.....................................................23.

Section 19.  Merger or Consolidation or Change of Name of Rights Agent.......................24.

                                       i.

<PAGE>

                                TABLE OF CONTENTS
                                   (continued)
                                                                                             Page
Section 20.  Duties of Rights Agent...........................................................24.

Section 21.  Change of Rights Agent...........................................................26.

Section 22.  Issuance of New Right Certificates...............................................27.

Section 23.  Redemption.......................................................................27.

Section 24.  Exchange.........................................................................29.

Section 25.  Notice of Certain Events.........................................................31.

Section 26.  Notices..........................................................................31.

Section 27.  Supplements and Amendments.......................................................32.

Section 28.  Determination and Actions by the Board of Directors, etc.........................32.

Section 29.  Successors.......................................................................33.

Section 30.  Benefits of this Agreement.......................................................33.

Section 31.  Severability.....................................................................33.

Section 32.  Governing Law....................................................................33.

Section 33.  Counterparts.....................................................................33.

Section 34.  Descriptive Headings.............................................................33.



Exhibit A -  Certificate of Designation

Exhibit B -  Form of Right Certificate

Exhibit C -  Summary of Rights to Purchase Preferred Shares

</TABLE>


                                       ii.

<PAGE>

                                RIGHTS AGREEMENT


         AGREEMENT,  dated as of February 26, 1997,  between  ARTERIAL  VASCULAR
ENGINEERING,  INC.,  a  Delaware  corporation  (the  "Company"),  and THE  FIRST
NATIONAL BANK OF BOSTON ("Rights Agent").

         The Board of  Directors  of the Company has  authorized  and declared a
dividend of one preferred share purchase right (a "Right") for each Common Share
(as hereinafter  defined) of the Company outstanding at the Close of Business on
March 21,  1997 (the  "Record  Date "),  each  Right  representing  the right to
purchase one one-hundredth of a Preferred Share (as hereinafter  defined),  upon
the terms and  subject  to the  conditions  herein set  forth,  and has  further
authorized  and  directed  the issuance of one Right with respect to each Common
Share that shall become outstanding  between the Record Date and the earliest to
occur of the  Distribution  Date, the Redemption  Date and the Final  Expiration
Date (as such terms are hereinafter defined); provided, however, that Rights may
be issued with respect to Common Shares that shall become  outstanding after the
Distribution  Date and prior to the earlier of the Redemption Date and the Final
Expiration  Date  in  accordance  with  the  provisions  of  Section  22 of this
Agreement.

         Accordingly, in consideration of the premises and the mutual agreements
herein set forth, the parties hereby agree as follows:

         Section 1. Certain  Definitions.  For purposes of this  Agreement,  the
following terms have the meanings indicated:

         (a)  "Acquiring  Person"  shall  mean  any  Person  (as  such  term  is
hereinafter  defined) who or which,  together with all Affiliates and Associates
(as such terms are hereinafter  defined) of such Person, shall be the Beneficial
Owner (as such term is hereinafter  defined) of 15% or more of the Common Shares
of the Company then  outstanding.  Notwithstanding  the foregoing,  (A) the term
Acquiring Person shall not include (i) the Company, (ii) any Subsidiary (as such
term is hereinafter defined) of the Company,  (iii) any employee benefit plan of
the Company or any  Subsidiary  of the  Company,  or (iv) or any entity  holding
Common  Shares for or pursuant to the terms of any such  employee  benefit plan,
and (B) no Person shall become an "Acquiring Person" either (x) as the result of
an acquisition of Common Shares by the Company which,  by reducing the number of
shares  outstanding,  increases the proportionate  number of shares beneficially
owned by such  Person to 15% or more of the Common  Shares of the  Company  then
outstanding;  provided,  however,  that if a Person shall become the  Beneficial
Owner of 15% or more of the Common  Shares of the Company  then  outstanding  by
reason of share  purchases by the Company and shall,  after such share purchases
by the Company,  become the Beneficial Owner of any additional  Common Shares of
the Company, then such Person shall be deemed to be an "Acquiring Person" or (y)
if the Board of Directors (as such term is  hereinafter  defined)  determines in
good  faith that a Person  who would  otherwise  be an  "Acquiring  Person,"  as
defined  pursuant to the foregoing  provisions of this paragraph (a), has become
such  inadvertently,  and such Person  divests,  as promptly as practicable  (as
determined in good faith

                                       1.

<PAGE>

by the Board of Directors)  following receipt of written notice from the Company
of such event, of a sufficient number of Common Shares so that such Person would
no  longer  be an  Acquiring  Person,  as  defined  pursuant  to  the  foregoing
provisions of this  paragraph (a), then such Person shall not be deemed to be an
"Acquiring Person" for any purposes of this Agreement.

         (b)  "Affiliate"  and  "Associate"  shall have the respective  meanings
ascribed to such terms in Rule 12b-2 of the General Rules and Regulations  under
the  Securities  Exchange Act of 1934, as amended (the  "Exchange  Act"),  as in
effect  on the date of this  Agreement;  provided,  however,  that  the  limited
partners of a limited  partnership  shall not be deemed to be Associates of such
limited partnership solely by virtue of their limited partnership interest.

         (c) A Person  shall be deemed  the  "Beneficial  Owner" of and shall be
deemed to "beneficially own" any securities:

                  (i) which such Person or any of such  Person's  Affiliates  or
         Associates beneficially owns, directly or indirectly;

                  (ii) which such Person or any of such  Person's  Affiliates or
         Associates  has (A)  the  right  to  acquire  (whether  such  right  is
         exercisable  immediately or only after the passage of time) pursuant to
         any  agreement,  arrangement  or  understanding  (other than  customary
         agreements with and between underwriters and selling group members with
         respect to a bona fide  public  offering  of  securities),  or upon the
         exercise of  conversion  rights,  exchange  rights,  rights (other than
         these Rights),  warrants or options, or otherwise;  provided,  however,
         that a Person  shall  not be  deemed  the  Beneficial  Owner  of, or to
         beneficially own,  securities tendered pursuant to a tender or exchange
         offer  made by or on  behalf  of such  Person  or any of such  Person's
         Affiliates or Associates  until such tendered  securities  are accepted
         for  purchase  or  exchange;  or (B) the right to vote  pursuant to any
         agreement,  arrangement or  understanding;  provided,  however,  that a
         Person shall not be deemed the Beneficial  Owner of, or to beneficially
         own, any security if the  agreement,  arrangement or  understanding  to
         vote such security (1) arises solely from a revocable  proxy or consent
         given  to  such  Person  in  response  to a  public  proxy  or  consent
         solicitation  made pursuant to, and in accordance  with, the applicable
         rules and regulations promulgated under the Exchange Act and (2) is not
         also then  reportable  on Schedule  13D under the  Exchange Act (or any
         comparable or successor report); or

                  (iii) which are beneficially owned, directly or indirectly, by
         any  other  Person  with  which  such  Person  or any of such  Person's
         Affiliates   or   Associates   has  any   agreement,   arrangement   or
         understanding   (other  than  customary  agreements  with  and  between
         underwriters  and selling  group  members  with  respect to a bona fide
         public offering of securities)  for the purpose of acquiring,  holding,
         voting  (except to the extent  contemplated  by the  proviso to Section
         1(c)(ii)(B)) or disposing of any securities of the Company.


                                       2.

<PAGE>

Notwithstanding  anything in this  definition  of  Beneficial  Ownership  to the
contrary, the phrase, "then outstanding," when used with reference to a Person's
Beneficial Ownership of securities of the Company, shall mean the number of such
securities  then  issued  and  outstanding  together  with  the  number  of such
securities not then actually issued and  outstanding  which such Person would be
deemed to own beneficially hereunder.

         (d) "Business Day" shall mean any day other than a Saturday,  a Sunday,
or a day  on  which  banking  institutions  in  the  States  of  California  are
authorized or obligated by law or executive order to close.

         (e) "Change in Majority of Directors" shall mean individuals who, as of
the date  hereof,  constitute  the Board (as of the date  hereof the  "Incumbent
Board")  cease for any reason to  constitute  at least a majority  of the Board,
provided,  however,  that any person becoming a director  subsequent to the date
hereof whose election, or nomination for election by the Company's stockholders,
was approved by a vote of at least a majority of the directors  then  comprising
the  Incumbent  Board  (other than an  Affiliate  or  Associate  of an Acquiring
Person)  shall be, for  purposes of this  Agreement,  considered  as though such
person were a member of the Incumbent Board.

         (f) "Close of Business" on any given date shall mean 5:00 p.m., Pacific
Standard  time,  on such  date;  provided,  however,  that if such date is not a
Business  Day it shall  mean  5:00  p.m.,  Eastern  Standard  time,  on the next
succeeding Business Day.

         (g) "Common  Shares" when used with reference to the Company shall mean
the shares of common stock,  par value $.001 per share, of the Company.  "Common
Shares" when used with reference to any Person other than the Company shall mean
the capital stock (or equity  interest)  with the greatest  voting power of such
other  Person or, if such other Person is a Subsidiary  of another  Person,  the
Person or Persons which ultimately control such first-mentioned Person.

         (h)  "Distribution  Date" shall have the meaning set forth in Section 3
hereof.

         (i) "Final Expiration Date" shall have the meaning set forth in Section
7 hereof.

         (j)  "Interested  Stockholder"  shall mean any Acquiring  Person or any
Affiliate or  Associate of an Acquiring  Person or any other Person in which any
such  Acquiring  Person,  Affiliate or Associate  has an interest,  or any other
Person  acting  directly or  indirectly on behalf of or in concert with any such
Acquiring Person, Affiliate or Associate.

         (k) "Person"  shall mean any  individual,  firm,  corporation  or other
entity, and shall include any successor (by merger or otherwise) of such entity.

         (l)   "Preferred   Shares"   shall  mean  shares  of  Series  A  Junior
Participating  Preferred Stock, par value $.001 per share, of the Company having
the designations and the powers,

                                       3.

<PAGE>

preferences and rights, and the qualifications, limitations and restrictions set
forth in the Form of Certificate  of  Designation  attached to this Agreement as
Exhibit A.

         (m)  "Redemption  Date"  shall have the  meaning set forth in Section 7
hereof.

         (n)  "Shares  Acquisition  Date"  shall  mean the first  date of public
announcement by the Company or an Acquiring  Person that an Acquiring Person has
become such  provided,  however that,  if such Person is determined  not to have
become an Acquiring  Person pursuant to (y) of the last sentence of Section 1(a)
hereof, then no Shares Acquisition Date shall be deemed to have occurred.

         (o)  "Subsidiary"  of any Person  shall mean any  corporation  or other
entity of which a majority of the voting power of the voting  equity  securities
or equity interest is owned, directly or indirectly, by such Person.

         (p)  "Transaction"  shall  mean any  merger,  consolidation  or sale of
assets  described in Section 13(a) hereof or any acquisition of shares of Common
Stock of the Company which would result in a Person becoming an Acquiring Person
or a Principal Party (as such term is defined in Section 13(b) hereof).

         (q) "Transaction  Person" with respect to a Transaction  shall mean (x)
any Person who (i) is or will become an  Acquiring  Person or a Principal  Party
(as such term is defined in Section 13(b) hereof) if the Transaction  were to be
consummated and (ii) directly or indirectly  proposed or nominated a director of
the  Company  which  director is in office at the time of  consideration  of the
Transaction, or (y) an Affiliate or Associate of such a Person.

         Section 2. Appointment of Rights Agent. The Company hereby appoints the
Rights Agent to act as agent for the Company and the holders of the Rights (who,
in accordance with Section 3 hereof,  shall prior to the Distribution  Date also
be the holders of the Common Shares) in accordance with the terms and conditions
hereof,  and the Rights Agent hereby accepts such  appointment.  The Company may
from time to time  appoint  such  co-Rights  Agents as it may deem  necessary or
desirable,  upon ten (10) days prior  written  notice to the Rights  Agent,  The
Rights Agent shall have no duty to supervise, and in no event, be liable for the
acts or commission of any such Co-Rights Agent.

         Section 3.  Issue of Right Certificates.

         (a) Until the  earlier of (i) the Shares  Acquisition  Date or (ii) the
tenth  business  day (or such later date as may be  determined  by action of the
Board of Directors prior to such time as any Person becomes an Acquiring Person)
after the date of the  commencement  (determined  in accordance  with Rule 14d-2
under the Exchange Act) by any Person (other than the Company, any Subsidiary of
the Company,  any employee  benefit plan of the Company or of any  Subsidiary of
the Company or any entity  holding Common Shares for or pursuant to the terms of
any such plan) of, or of the first public  announcement  of the intention of any
Person  (other than the Company,  any  Subsidiary  of the Company,  any employee
benefit  plan of the Company or of any  Subsidiary  of the Company or any entity
holding  Common  Shares  for or  pursuant  to the  terms  of any  such  plan) to
commence, a tender or exchange offer (which intention to commence

                                       4.

<PAGE>

remains  in  effect  for  five  Business  Days  after  such  announcement),  the
consummation  of which would result in any Person  becoming an Acquiring  Person
(including  any such date which is after the date of this Agreement and prior to
the issuance of the Rights,  the earlier of such dates being herein  referred to
as  the  "Distribution   Date"),  (x)  the  Rights  will  be  evidenced  by  the
certificates  for Common Shares  registered in the names of the holders  thereof
(which  certificates  shall also be deemed to be Right  Certificates) and not by
separate Right Certificates,  and (y) the Rights (and the right to receive Right
Certificates therefor) will be transferable only in connection with the transfer
of Common  Shares.  As soon as  practicable  after the  Distribution  Date,  the
Company  will prepare and execute,  the Rights Agent will  countersign,  and the
Company will send or cause to be sent (and the Rights Agent will,  if requested,
send) by first-class,  insured,  postage-prepaid  mail, to each record holder of
Common  Shares as of the Close of  Business  on the  Distribution  Date,  at the
address of such holder shown on the records of the Company, a Right Certificate,
in  substantially  the  form  of  Exhibit  B  hereto  (a  "Right  Certificate"),
evidencing one Right for each Common Share so held. As of the Distribution Date,
the Rights will be evidenced solely by such Right Certificates.

         (b) On the  Record  Date,  or as soon as  practicable  thereafter,  the
Company will send a copy of a Summary of Rights to Purchase Preferred Shares, in
substantially  the form of  Exhibit  C hereto  (the  "Summary  of  Rights"),  by
first-class,  postage-prepaid mail, to each record holder of Common Shares as of
the Close of Business on the Record Date, at the address of such holder shown on
the records of the  Company.  With  respect to  certificates  for Common  Shares
outstanding as of the Record Date, until the Distribution  Date, the Rights will
be  evidenced  by such  certificates  registered  in the  names  of the  holders
thereof.  Until the Distribution Date (or the earlier of the Redemption Date and
the Final  Expiration  Date),  the surrender for transfer of any certificate for
Common Shares  outstanding on the Record Date shall also constitute the transfer
of the Rights associated with the Common Shares represented thereby.

         (c) Certificates for Common Shares which become outstanding (including,
without limitation, reacquired Common Shares referred to in the last sentence of
this  paragraph  (c)) after the  Record  Date but prior to the  earliest  of the
Distribution  Date, the Redemption Date or the Final  Expiration Date shall have
impressed on, printed on, written on or otherwise  affixed to them the following
legend:

                  This certificate also evidences and entitles the holder hereof
                  to certain rights as set forth in a Rights  Agreement  between
                  Arterial  Vascular  Engineering,  Inc. and THE FIRST  NATIONAL
                  BANK OF BOSTON, dated as of February 26, 1997, as amended from
                  time to time (the "Rights Agreement"),  the terms of which are
                  hereby incorporated herein by reference and a copy of which is
                  on  file  at  the  principal  executive  offices  of  Arterial
                  Vascular Engineering, Inc. Under certain circumstances, as set
                  forth in the Rights  Agreement,  such Rights will be evidenced
                  by separate  certificates  and will no longer be  evidenced by
                  this  certificate.  Arterial Vascular  Engineering,  Inc. will
                  mail to the  holder of this  certificate  a copy of the Rights
                  Agreement without charge after

                                       5.

<PAGE>

                  receipt of a written  request  therefor.  As  described in the
                  Rights  Agreement,  Rights issued to any Person who becomes an
                  Acquiring  Person or an  Affiliate  or  Associate  thereof (as
                  defined in the Rights  Agreement) and certain related persons,
                  whether  currently  held by or on behalf of such  Person or by
                  any subsequent holder shall become null and void.

With respect to such  certificates  containing the foregoing  legend,  until the
Distribution  Date, the Rights associated with the Common Shares  represented by
such  certificates  shall  be  evidenced  by such  certificates  alone,  and the
surrender  for  transfer  of any such  certificate  shall  also  constitute  the
transfer of the Rights associated with the Common Shares represented thereby. In
the event that the Company  purchases  or acquires  any Common  Shares after the
Record Date but prior to the Distribution  Date, any Rights associated with such
Common Shares shall be deemed canceled and retired so that the Company shall not
be entitled to exercise any Rights  associated  with the Common Shares which are
no longer outstanding.

         Section 4.  Form of Right Certificates.

         (a) The  Right  Certificates  (and the  form of  election  to  purchase
Preferred  Shares,  the form of assignment and the form of  certification  to be
printed on the reverse  thereof)  shall be  substantially  the same as Exhibit B
hereto  and may  have  such  marks of  identification  or  designation  and such
legends,  summaries  or  endorsements  printed  thereon as the  Company may deem
appropriate and as are not  inconsistent  with the provisions of this Agreement,
or as may be  required  to comply  with any  applicable  law or with any rule or
regulation  made  pursuant  thereto or with any rule or  regulation of any stock
exchange  on which the Rights may from time to time be listed,  or to conform to
usage.  Subject to the provisions of Section 22 hereof,  the Right  Certificates
shall entitle the holders thereof to purchase such number of one  one-hundredths
of a  Preferred  Share  as shall  be set  forth  therein  at the  price  per one
one-hundredth of a Preferred Share set forth therein (the "Purchase Price"), but
the number of such one  one-hundredths  of a  Preferred  Share and the  Purchase
Price shall be subject to adjustment as provided herein.

         (b) Any Right Certificate issued pursuant to Section 3(a) or Section 22
hereof  that  represents  Rights  which are null and void  pursuant  to  Section
11(a)(ii) of this Agreement and any Right Certificate issued pursuant to Section
6 or Section 11 hereof upon transfer, exchange, replacement or adjustment of any
other Right  Certificate  referred to in this  sentence,  shall  contain (to the
extent feasible) the following legend:

                  The Rights  represented by this Right  Certificate are or were
                  beneficially  owned by a Person who was or became an Acquiring
                  Person or an Affiliate or Associate of an Acquiring Person (as
                  such terms are defined in the Rights Agreement).  Accordingly,
                  this Right Certificate and the Rights  represented  hereby are
                  null and void.


                                       6.

<PAGE>

The provisions of Section  11(a)(ii) of this Rights Agreement shall be operative
whether or not the foregoing legend is contained on any such Right Certificate.

         Section 5.  Countersignature  and Registration.  The Right Certificates
shall be  executed on behalf of the  Company by its  Chairman of the Board,  its
Chief  Executive  Officer,  its President,  its Vice Chairman of the Board,  its
Chief Financial  Officer,  or any of its Vice Presidents,  either manually or by
facsimile  signature,  shall  have  affixed  thereto  the  Company's  seal  or a
facsimile  thereof,  and shall be  attested  by the  Secretary  or an  Assistant
Secretary of the Company,  either manually or by facsimile signature.  The Right
Certificates  shall be manually  countersigned by the Rights Agent and shall not
be valid  for any  purpose  unless  countersigned.  In case any  officer  of the
Company  who shall have signed any of the Right  Certificates  shall cease to be
such  officer of the Company  before  countersignature  by the Rights  Agent and
issuance and delivery by the Company, such Right Certificates, nevertheless, may
be  countersigned  by the Rights  Agent and issued and  delivered by the Company
with the same  force and  effect as though  the  person  who  signed  such Right
Certificates  had not ceased to be such  officer of the  Company;  and any Right
Certificate  may be signed on behalf of the  Company by any person  who,  at the
actual  date of the  execution  of such  Right  Certificate,  shall  be a proper
officer of the Company to sign such Right  Certificate,  although at the date of
the execution of this Rights Agreement any such person was not such an officer.

         Following the Distribution Date, the Rights Agent will keep or cause to
be kept, at its office  designated for such purpose,  books for registration and
transfer of the Right Certificates  issued hereunder.  Such books shall show the
names and addresses of the  respective  holders of the Right  Certificates,  the
number of Rights evidenced on its face by each of the Right Certificates and the
date of each of the Right Certificates.

         Section  6.  Transfer,  Split Up,  Combination  and  Exchange  of Right
Certificates;  Mutilated, Destroyed, Lost or Stolen Right Certificates.  Subject
to the provisions of Section 4(b), Section 11(a)(ii),  Section 14 and Section 24
hereof, at any time after the Close of Business on the Distribution Date, and at
or prior to the Close of Business on the earlier of the  Redemption  Date or the
Final  Expiration  Date,  any Right  Certificate  or Right  Certificates  may be
transferred,  split up,  combined or exchanged for another Right  Certificate or
Right Certificates, entitling the registered holder to purchase a like number of
one  one-hundredths  of a  Preferred  Share as the  Right  Certificate  or Right
Certificates  surrendered then entitled such holder to purchase.  Any registered
holder desiring to transfer, split up, combine or exchange any Right Certificate
or Right Certificates shall make such request in writing delivered to the Rights
Agent,  and shall  surrender the Right  Certificate or Right  Certificates to be
transferred,  split up,  combined or exchanged at the office of the Rights Agent
designated  for such purpose.  Neither the Rights Agent nor the Company shall be
obligated to take any action whatsoever with respect to the transfer of any such
surrendered  Right  Certificate until the registered holder shall have completed
and signed the  certificate  contained in the form of  assignment on the reverse
side of such Right Certificate and shall have provided such additional  evidence
of the  identity  of the  Beneficial  Owner  (or  former  Beneficial  Owner)  or
Affiliates  or  Associates  thereof as the  Company  shall  reasonably  request.
Thereupon the Rights Agent shall,  subject to Section 4(b),  Section  11(a)(ii),
Section 14 and Section 24 hereof, countersign and deliver to the person entitled

                                       7.

<PAGE>

thereto a Right  Certificate  or Right  Certificates,  as the case may be, as so
requested.  The Company may require payment of a sum sufficient to cover any tax
or  governmental  charge that may be imposed in  connection  with any  transfer,
split up, combination or exchange of Right Certificates.

         Upon receipt by the Company and the Rights Agent of evidence reasonably
satisfactory  to them of the loss,  theft,  destruction or mutilation of a Right
Certificate,  and,  in case of  loss,  theft or  destruction,  of  indemnity  or
security  reasonably  satisfactory  to  them,  and,  at the  Company's  request,
reimbursement  to the Company and the Rights  Agent of all  reasonable  expenses
incidental  thereto,  and upon surrender to the Rights Agent and cancellation of
the Right Certificate if mutilated,  the Company will issue, execute and deliver
a new Right  Certificate of like tenor to the Rights Agent for  countersignature
and delivery to the registered  holder in lieu of the Right Certificate so lost,
stolen, destroyed or mutilated.

         Section 7.  Exercise  of Rights;  Purchase  Price;  Expiration  Date of
Rights.

         (a) The  registered  holder of any Right  Certificate  may exercise the
Rights  evidenced  thereby (except as otherwise  provided herein) in whole or in
part at any time  after  the  Distribution  Date  upon  surrender  of the  Right
Certificate,  with the form of election to purchase on the reverse  side thereof
duly executed,  to the Rights Agent at the office of the Rights Agent designated
for such  purpose,  together  with  payment of the  Purchase  Price for each one
one-hundredth  of a  Preferred  Share (or such  other  number of shares or other
securities) as to which the Rights are exercised, at or prior to the earliest of
(i) the Close of Business on March 21, 2007 (the "Final Expiration Date"),  (ii)
the time at which the Rights are  redeemed as provided in Section 23 hereof (the
"Redemption  Date"),  or (iii) the time at which such  Rights are  exchanged  as
provided in Section 24 hereof.

         (b) The Purchase Price for each one  one-hundredth of a Preferred Share
pursuant  to the  exercise of a Right shall  initially  be $75.00,  and shall be
subject to adjustment from time to time as provided in Sections 11 and 13 hereof
and shall be  payable  in  lawful  money of the  United  States  of  America  in
accordance with paragraph (c) below.

         (c)  Upon  receipt  of a  Right  Certificate  representing  exercisable
Rights,  with the form of election to purchase  duly  executed,  accompanied  by
payment of the Purchase Price for the shares to be purchased and an amount equal
to any  applicable  transfer tax required to be paid by the holder of such Right
Certificate in accordance  with Section 9 hereof by certified  check,  cashier's
check, bank draft or money order payable to the order of the Company, the Rights
Agent shall thereupon  promptly (i) (A) requisition  from any transfer agent for
the  Preferred  Shares  certificates  for the number of  Preferred  Shares to be
purchased and the Company  hereby  irrevocably  authorizes its transfer agent to
comply with all such requests,  or (B) if the Company,  in its sole  discretion,
shall have elected to deposit the Preferred Shares issuable upon exercise of the
Rights  hereunder  into a  depository,  requisition  from the  depositary  agent
depositary  receipts  representing  such  number  of  one  one-hundredths  of  a
Preferred  Share as are to be  purchased  (in which  case  certificates  for the
Preferred Shares represented by such receipts shall be deposited by the transfer
agent with the depositary agent) and the Company hereby directs


                                       8.

<PAGE>

the  depositary  agent to comply  with  such  request,  (ii)  when  appropriate,
requisition  from the  Company the amount of cash to be paid in lieu of issuance
of fractional  shares in accordance with Section 14 hereof,  (iii) after receipt
of such certificates or depositary  receipts,  cause the same to be delivered to
or upon the order of the registered holder of such Right Certificate, registered
in such  name or  names  as may be  designated  by such  holder  and  (iv)  when
appropriate,  after  receipt,  deliver  such  cash to or upon  the  order of the
registered  holder of such Right  Certificate.  In the event that the Company is
obligated  to issue  securities  of the  Company  other  than  Preferred  Shares
(including  Common Shares) of the Company pursuant to Section 11(a) hereof,  the
Company will make all  arrangements  necessary so that such other securities are
available for distribution by the Rights Agent, if and when appropriate.

         In  addition,  in the case of an  exercise  of the  Rights  by a holder
pursuant  to  Section  11(a)(ii),  the  Rights  Agent  shall  return  such Right
Certificate  to the  registered  holder  thereof after  imprinting,  stamping or
otherwise   indicating  thereon  that  the  rights  represented  by  such  Right
Certificate  no longer include the rights  provided by Section  11(a)(ii) of the
Rights  Agreement,  and, if fewer than all the Rights  represented by such Right
Certificate  were so  exercised,  the Rights  Agent shall  indicate on the Right
Certificate the number of Rights  represented  thereby which continue to include
the rights provided by Section 11(a)(ii).

         (d) In case  the  registered  holder  of any  Right  Certificate  shall
exercise fewer than all the Rights evidenced  thereby,  a new Right  Certificate
evidencing Rights equivalent to the Rights remaining unexercised shall be issued
by the Rights Agent to the registered holder of such Right Certificate or to his
duly authorized assigns, subject to the provisions of Section 14 hereof.

         (e) The Company  covenants and agrees that it will cause to be reserved
and kept available out of its authorized  and unissued  Preferred  Shares or any
Preferred Shares held in its treasury,  the number of Preferred Shares that will
be  sufficient  to permit  the  exercise  in full of all  outstanding  Rights in
accordance with this Section 7.

         (f) Notwithstanding anything in this Agreement to the contrary, neither
the Rights Agent nor the Company shall be obligated to undertake any action with
respect to a registered holder upon the occurrence of any purported  exercise as
set  forth in this  Section  7 unless  such  registered  holder  shall  have (i)
completed  and  signed  the  certification  following  the form of  election  to
purchase set forth on the reverse side of the Rights Certificate surrendered for
such exercise and (ii) provided such additional  evidence of the identity of the
Beneficial  Owner (or  former  Beneficial  Owner) or  Affiliates  or  Associates
thereof as the Company shall reasonably request.

         Section 8.  Cancellation  and  Destruction of Right  Certificates.  All
Right Certificates surrendered for the purpose of exercise,  transfer, split up,
combination  or exchange  shall,  if surrendered to the Company or to any of its
agents,  be delivered to the Rights Agent for  cancellation or in canceled form,
or, if delivered or  surrendered  to the Rights Agent,  shall be canceled by it,
and no Right  Certificates  shall be issued in lieu thereof  except as expressly
permitted by any of the provisions of this Rights  Agreement.  The Company shall
deliver to the Rights  Agent for  cancellation  and  retirement,  and the Rights
Agent shall so cancel and retire,


                                       9.

<PAGE>

any other Right Certificate  purchased or acquired by the Company otherwise than
upon the exercise  thereof.  The Rights Agent shall  deliver all canceled  Right
Certificates  to the Company,  or shall,  at the written request of the Company,
destroy  such  canceled  Right  Certificates,  and in such case shall  deliver a
certificate of destruction thereof to the Company.

         Section 9. Availability of Preferred Shares.  The Company covenants and
agrees  that so long as the  Preferred  Shares  (and,  after  the  time a person
becomes an Acquiring  Person,  Common Shares or any other  securities)  issuable
upon the  exercise  of the  Rights  may be  listed  on any  national  securities
exchange or quotation  system,  the Company shall use its best efforts to cause,
from and after such time as the Rights become  exercisable,  all shares reserved
for such  issuance  to be listed  on such  exchange  or  quotation  system  upon
official notice of issuance upon such exercise.

         The Company  covenants  and agrees that it will take all such action as
may be necessary to ensure that all Preferred Shares (or Common Shares and other
securities,  as the case may be) delivered upon exercise of Rights shall, at the
time of delivery  of the  certificates  for such  Preferred  Shares  (subject to
payment of the Purchase  Price),  be duly and validly  authorized and issued and
fully paid and nonassessable shares or other securities.

         The Company further  covenants and agrees that it will pay when due and
payable any and all federal and state  transfer  taxes and charges  which may be
payable in respect of the issuance or delivery of the Right  Certificates  or of
any  Preferred  Shares  upon the  exercise  of Rights.  The  Company  shall not,
however,  be required to pay any transfer tax which may be payable in respect of
any transfer or delivery of Right  Certificates  to a person other than,  or the
issuance or delivery of  certificates  or depositary  receipts for the Preferred
Shares  in a name  other  than  that of,  the  registered  holder  of the  Right
Certificate evidencing Rights surrendered for exercise or to issue or to deliver
any  certificates or depositary  receipts for Preferred Shares upon the exercise
of any  Rights  until  any such tax  shall  have  been  paid (any such tax being
payable by the holder of such Right  Certificate  at the time of  surrender)  or
until it has been established to the Company's  reasonable  satisfaction that no
such tax is due.

         As soon as practicable  after the Shares  Acquisition Date, the Company
shall use its best efforts to:

                  (i)  prepare  and  file a  registration  statement  under  the
         Securities  Act of 1933,  as amended (the  "Act"),  with respect to the
         Rights and the securities purchasable upon exercise of the Rights on an
         appropriate  form, will use its best efforts to cause such registration
         statement to become effective as soon as practicable  after such filing
         and will use its best efforts to cause such  registration  statement to
         remain   effective   (with  a  prospectus  at  all  times  meeting  the
         requirements of the Act) until the Final Expiration Date; and

                  (ii) use its best  efforts to qualify or  register  the Rights
         and the  securities  purchasable  upon exercise of the Rights under the
         blue sky laws of such jurisdictions as may be necessary or appropriate.

                                       10.

<PAGE>

         Section 10. Preferred Shares Record Date. Each person in whose name any
certificate for Preferred Shares or other securities is issued upon the exercise
of Rights  shall for all  purposes be deemed to have become the holder of record
of the Preferred  Shares or other  securities  represented  thereby on, and such
certificate shall be dated, the date upon which the Right Certificate evidencing
such Rights was duly  surrendered  with the forms of election and  certification
duly  executed and payment of the Purchase  Price (and any  applicable  transfer
taxes)  was made;  provided,  however,  that if the date of such  surrender  and
payment is a date upon which the Preferred Shares or other  securities  transfer
books of the Company are closed,  such person shall be deemed to have become the
record holder of such shares on, and such  certificate  shall be dated, the next
succeeding  Business  Day on which  the  Preferred  Shares  or other  securities
transfer  books of the  Company  are open.  Prior to the  exercise of the Rights
evidenced  thereby,  the holder of a Right  Certificate,  as such,  shall not be
entitled  to any  rights of a holder of  Preferred  Shares  for which the Rights
shall be  exercisable,  including,  without  limitation,  the right to vote,  to
receive dividends or other  distributions or to exercise any preemptive  rights,
and shall not be  entitled  to  receive  any  notice of any  proceedings  of the
Company, except as provided herein.

         Section 11. Adjustment of Purchase Price, Number of Shares or Number of
Rights. The Purchase Price, the number of Preferred Shares covered by each Right
and the number of Rights outstanding are subject to adjustment from time to time
as provided in this Section 11.

         (a)      (i) In the event the Company  shall at any time after the date
of this  Agreement  (A) declare a dividend on the  Preferred  Shares  payable in
Preferred Shares,  (B) subdivide the outstanding  Preferred Shares,  (C) combine
the outstanding  Preferred  Shares into a smaller number of Preferred  Shares or
(D) issue any shares of its capital stock in a reclassification of the Preferred
Shares (including any such  reclassification  in connection with a consolidation
or merger in which the  Company is the  continuing  or  surviving  corporation),
except as otherwise provided in this Section 11(a), the Purchase Price in effect
at the time of the record  date for such  dividend or of the  effective  date of
such subdivision,  combination or  reclassification,  and the number and kind of
shares of capital stock issuable on such date, shall be proportionately adjusted
so that the holder of any Right  exercised  after such time shall be entitled to
receive the aggregate  number and kind of shares of capital stock which, if such
Right had been exercised  immediately  prior to such date and at a time when the
Preferred Shares transfer books of the Company were open, such holder would have
owned  upon  such  exercise  and been  entitled  to  receive  by  virtue of such
dividend, subdivision, combination or reclassification;  provided, however, that
in no event shall the consideration to be paid upon the exercise of one Right be
less than the  aggregate par value of the shares of capital stock of the Company
issuable upon  exercise of one Right.  If an event occurs which would require an
adjustment  under both Section  11(a)(i) and Section  11(a)(ii),  the adjustment
provided for in this Section 11(a)(i) shall be in addition to, and shall be made
prior to any adjustment required pursuant to Section 11(a)(ii).

                  (ii) Subject to Section 24 of this Agreement, in the event any
Person  shall become an Acquiring  Person,  each holder of a Right shall,  for a
period of 60 days after the later of such time any Person  becomes an  Acquiring
Person or the effective date of an appropriate


                                       11.

<PAGE>

registration  statement  under the Act  pursuant to Section 9 hereof  (provided,
however  that,  if at any time prior to the  expiration  or  termination  of the
Rights there shall be a temporary  restraining order, a preliminary  injunction,
an  injunction,  or temporary  suspension by the Board of Directors,  or similar
obstacle to exercise of the Rights (the "Injunction") which prevents exercise of
the Rights,  a new 60-day  period shall  commence on the date the  Injunction is
removed), have a right to receive, upon exercise thereof at a price equal to the
then current Purchase Price multiplied by the number of one  one-hundredths of a
Preferred  Share for which a Right is then  exercisable,  in accordance with the
terms of this Agreement and in lieu of Preferred  Shares,  such number of Common
Shares of the Company as shall equal the result  obtained by (A) multiplying the
then current Purchase Price by the number of one  one-hundredths  of a Preferred
Share for which a Right is then exercisable and dividing that product by (B) 50%
of the then  current  per share  market  price of the  Company's  Common  Shares
(determined  pursuant to Section 11(d) hereof) on the date such Person became an
Acquiring  Person;  provided,  however,  that  if  the  transaction  that  would
otherwise  give  rise  to  the  foregoing  adjustment  is  also  subject  to the
provisions of Section 13 hereof,  then only the  provisions of Section 13 hereof
shall apply and no adjustment shall be made pursuant to this Section  11(a)(ii).
In the event that any Person  shall  become an  Acquiring  Person and the Rights
shall then be  outstanding,  the Company  shall not take any action  which would
eliminate or diminish the benefits intended to be afforded by the Rights.

         Notwithstanding  anything in this  Agreement to the contrary,  from and
after the time any Person becomes an Acquiring Person,  any Rights  beneficially
owned  by (i)  such  Acquiring  Person  or an  Associate  or  Affiliate  of such
Acquiring  Person,  (ii) a transferee of such  Acquiring  Person (or of any such
Associate or  Affiliate)  who becomes a transferee  after the  Acquiring  Person
became such,  or (iii) a  transferee  of such  Acquiring  Person (or of any such
Associate or Affiliate) who becomes a transferee  prior to or concurrently  with
the Acquiring Person's becoming such and receives such Rights pursuant to either
(A) a transfer (whether or not for  consideration)  from the Acquiring Person to
holders of equity  interests in such Acquiring Person or to any Person with whom
the Acquiring Person has any continuing agreement,  arrangement or understanding
regarding the transferred  Rights or (B) a transfer which the Board of Directors
of the Company has determined is part of a plan,  arrangement  or  understanding
which  has as a  primary  purpose  or  effect  the  avoidance  of  this  Section
11(a)(ii),  shall become null and void without any further  action and no holder
of such Rights  shall have any rights  whatsoever  with  respect to such Rights,
whether  under any provision of this  Agreement or otherwise.  The Company shall
use all  reasonable  efforts  to  insure  that the  provisions  of this  Section
11(a)(ii) and Section 4(b) are complied with, but shall have no liability to any
holder of Right  Certificates or other Person as a result of its failure to make
any  determinations  with  respect  to an  Acquiring  Person or its  Affiliates,
Associates or transferees hereunder. No Right Certificate shall be issued at any
time upon the transfer of any Rights to an  Acquiring  Person whose Rights would
be void pursuant to the preceding sentence or any Associate or Affiliate thereof
or to any nominee of such  Acquiring  Person,  Associate or  Affiliate;  and any
Right  Certificate  delivered  to the Rights  Agent for transfer to an Acquiring
Person whose Rights would be void  pursuant to the preceding  sentence  shall be
canceled.

                                       12.

<PAGE>

                  (iii) In lieu of issuing  shares of Common Stock in accordance
with Section  11(a)(ii)  hereof,  the Company may, if a majority of the Board of
Directors then in office determines that such action is necessary or appropriate
and not contrary to the  interests of holders of Rights,  elect to (and,  in the
event that the Board of Directors has not exercised the exchange right contained
in  Section  24(c)  hereof  and there are not  sufficient  treasury  shares  and
authorized but unissued shares of Common Stock to permit the exercise in full of
the Rights in  accordance  with the  foregoing  subparagraph  (ii),  the Company
shall) take all such action as may be necessary to authorize, issue or pay, upon
the  exercise  of the  Rights,  cash  (including  by way of a  reduction  of the
Purchase  Price),  property,  shares of Common  Stock,  other  securities or any
combination  thereof having an aggregate  value equal to the value of the shares
of Common Stock which  otherwise  would have been  issuable  pursuant to Section
11(a)(ii),  which aggregate value shall be determined by a nationally recognized
investment  banking firm selected by a majority of the Board of  Directors.  For
purposes  of the  preceding  sentence,  the value of the Common  Stock  shall be
determined pursuant to Section 11(d) hereof and the value of any preferred stock
or preference stock which a majority of the Board of Directors  determines to be
a "common stock equivalent" shall be deemed to have the same value as the Common
Stock.  Any such  election by the Board of  Directors  must be made and publicly
announced  within 60 days  following  the date on which the event  described  in
Section  11(a)(ii)  shall have  occurred.  Following the occurrence of the event
described in Section 11(a)(ii) hereof, a majority of the Board of Directors then
in office may suspend the  exercisability of the Rights for a period of up to 60
days following the date on which the event described in Section  11(a)(ii) shall
have occurred to the extent that such directors  have not determined  whether to
exercise their rights of election under this Section 11(a)(iii). In the event of
any such suspension,  the Company shall issue a public announcement stating that
the exercisability of the Rights has been temporarily suspended.

         (b) In case the  Company  shall fix a record  date for the  issuance of
rights,  options or warrants to all holders of Preferred  Shares  entitling them
(for a period  expiring  within 45  calendar  days  after such  record  date) to
subscribe  for  or  purchase   Preferred  Shares  (or  shares  having  the  same
designations  and the powers,  preferences and rights,  and the  qualifications,
limitations and  restrictions  as the Preferred  Shares  ("equivalent  preferred
shares"))  or  securities   convertible  into  Preferred  Shares  or  equivalent
preferred  shares at a price per Preferred  Share or equivalent  preferred share
(or  having a  conversion  price  per  share,  if a  security  convertible  into
Preferred Shares or equivalent  preferred shares) less than the then current per
share market price of the Preferred Shares (as defined in Section 11(d)) on such
record date,  the Purchase Price to be in effect after such record date shall be
determined by multiplying the Purchase Price in effect immediately prior to such
record  date by a  fraction,  the  numerator  of which  shall be the  number  of
Preferred  Shares  outstanding  on such record date plus the number of Preferred
Shares  which the  aggregate  offering  price of the total  number of  Preferred
Shares and/or equivalent preferred shares so to be offered (and/or the aggregate
initial  conversion price of the convertible  securities so to be offered) would
purchase at such current market price and the  denominator of which shall be the
number of Preferred  Shares  outstanding  on such record date plus the number of
additional Preferred Shares and/or equivalent preferred shares to be offered for
subscription  or purchase  (or into which the  convertible  securities  so to be
offered are initially  convertible);  provided,  however, that in no event shall
the consideration to be paid upon the


                                       13.

<PAGE>

exercise  of one Right be less  than the  aggregate  par value of the  shares of
capital stock of the Company  issuable upon exercise of one Right.  In case such
subscription  price may be paid in a consideration part or all of which shall be
in a form  other  than  cash,  the  value  of  such  consideration  shall  be as
determined  in good  faith  by the  Board of  Directors  of the  Company,  whose
determination  shall be  described in a statement  filed with the Rights  Agent.
Preferred  Shares  owned by or held for the account of the Company  shall not be
deemed  outstanding  for the purpose of any such  computation.  Such  adjustment
shall be made  successively  whenever  such a record  date is fixed;  and in the
event that such  rights,  options or warrants  are not so issued,  the  Purchase
Price shall be adjusted to be the  Purchase  Price which would then be in effect
if such record date had not been fixed.

         (c) In case the  Company  shall fix a record  date for the  making of a
distribution  to all  holders  of  the  Preferred  Shares  (including  any  such
distribution  made in  connection  with a  consolidation  or merger in which the
Company is the continuing or surviving corporation) of evidences of indebtedness
or assets (other than a regular quarterly cash dividend or a dividend payable in
Preferred Shares) or subscription  rights or warrants  (excluding those referred
to in Section  11(b)  hereof),  the  Purchase  Price to be in effect  after such
record date shall be  determined  by  multiplying  the Purchase  Price in effect
immediately  prior to such  record date by a fraction,  the  numerator  of which
shall be the then  current per share market  price of the  Preferred  Shares (as
defined in Section  11(d)) on such record  date,  less the fair market value (as
determined  in good  faith  by the  Board of  Directors  of the  Company,  whose
determination  shall be described in a statement filed with the Rights Agent) of
the portion of the assets or evidences of  indebtedness  so to be distributed or
of such  subscription  rights or warrants  applicable to one Preferred Share and
the  denominator  of which shall be such  current per share  market price of the
Preferred Shares; provided, however, that in no event shall the consideration to
be paid upon the exercise of one Right be less than the  aggregate  par value of
the shares of capital  stock of the  Company to be issued  upon  exercise of one
Right. Such adjustments  shall be made successively  whenever such a record date
is fixed;  and in the event that such  distribution is not so made, the Purchase
Price shall again be  adjusted to be the  Purchase  Price which would then be in
effect if such record date had not been fixed.

         (d)      (i) For the purpose of any computation hereunder, the "current
per share market  price" of any security (a  "Security"  for the purpose of this
Section  11(d)(i))  on any date  shall be deemed to be the  average of the daily
closing  prices per share of such Security for the 30  consecutive  Trading Days
(as such term is hereinafter  defined) immediately prior to such date; provided,
however,  that in the  event  that the  current  per share  market  price of the
Security is determined  during a period following the announcement by the issuer
of such Security of (A) a dividend or distribution  on such Security  payable in
shares of such Security or securities  convertible into such shares,  or (B) any
subdivision,  combination  or  reclassification  of such  Security or securities
convertible  into  such  shares,   or  (C)  any   subdivision,   combination  or
reclassification of such Security and prior to the expiration of 30 Trading Days
after the ex- dividend  date for such  dividend or  distribution,  or the record
date for such subdivision,  combination or  reclassification,  then, and in each
such case, the current per share market price shall be appropriately adjusted to
reflect the current  market price per share  equivalent  of such  Security.  The
closing  price for each day shall be the last sale price,  regular  way,  or, in
case


                                       14.

<PAGE>



no such sale takes  place on such day,  the average of the closing bid and asked
prices,  regular way, in either case as reported in the  principal  consolidated
transaction  reporting  system with respect to securities  listed or admitted to
trading  on the New York Stock  Exchange  or, if the  Security  is not listed or
admitted to trading on the New York Stock Exchange, as reported in the principal
consolidated  transaction  reporting system with respect to securities listed on
the principal  national  securities  exchange on which the Security is listed or
admitted  to trading or as  reported  on the Nasdaq  National  Market or, if the
Security  is not  listed or  admitted  to  trading  on any  national  securities
exchange or reported on the Nasdaq National Market, the last quoted price or, if
not so  quoted,  the  average  of the  high  bid and  low  asked  prices  in the
over-the-counter  market, as reported by the National  Association of Securities
Dealers,  Inc. Automated  Quotations System ("Nasdaq") or such other system then
in use,  or,  if on any  such  date  the  Security  is not  quoted  by any  such
organization,  the average of the closing bid and asked prices as furnished by a
professional  market maker making a market in the Security selected by the Board
of Directors of the Company.  The term  "Trading  Day" shall mean a day on which
the principal  national  securities  exchange on which the Security is listed or
admitted to trading is open for the  transaction of business or, if the Security
is not listed or  admitted to trading on any  national  securities  exchange,  a
Business Day.

                  (ii)  For  the  purpose  of  any  computation  hereunder,  the
"current per share market price" of the Preferred  Shares shall be determined in
accordance  with the  method  set forth in Section  11(d)(i).  If the  Preferred
Shares are not publicly  traded,  the  "current  per share market  price" of the
Preferred Shares shall be conclusively deemed to be the current per share market
price  of  the  Common  Shares  as  determined   pursuant  to  Section  11(d)(i)
(appropriately  adjusted to reflect any stock split,  stock  dividend or similar
transaction  occurring  after the date hereof)  multiplied  by one  hundred.  If
neither  the Common  Shares nor the  Preferred  Shares are  publicly  held or so
listed or traded, "current per share market price" shall mean the fair value per
share as  determined  in good faith by the Board of  Directors  of the  Company,
whose  determination  shall be  described  in a statement  filed with the Rights
Agent.

         (e) No adjustment in the Purchase  Price shall be required  unless such
adjustment  would require an increase or decrease of at least 1% in the Purchase
Price;  provided,  however, that any adjustments which by reason of this Section
11(e) are not  required  to be made  shall be  carried  forward  and taken  into
account in any subsequent  adjustment.  All  calculations  under this Section 11
shall be made to the  nearest  cent or to the  nearest  one  one-hundredth  of a
Preferred Share or one ten-thousandth of any other share or security as the case
may be. Notwithstanding the first sentence of this Section 11(e), any adjustment
required by this Section 11 shall be made no later than the earlier of (i) three
years from the date of the  transaction  which requires such  adjustment or (ii)
the date of the expiration of the right to exercise any Rights.

         (f) If as a result of an  adjustment  made  pursuant  to Section  11(a)
hereof,  the holder of any Right  thereafter  exercised shall become entitled to
receive any shares of capital stock of the Company other than Preferred  Shares,
thereafter  the number of such other shares so  receivable  upon exercise of any
Right shall be subject to adjustment  from time to time in a manner and on terms
as nearly  equivalent  as  practicable  to the  provisions  with  respect to the
Preferred  Shares  contained in Section  11(a) through (c),  inclusive,  and the
provisions of


                                       15.

<PAGE>

Sections 7, 9, 10, 13 and 14 with respect to the Preferred Shares shall apply on
like terms to any such other shares.

         (g) All  Rights  originally  issued by the  Company  subsequent  to any
adjustment  made to the Purchase  Price  hereunder  shall  evidence the right to
purchase,  at the adjusted Purchase Price, the number of one one-hundredths of a
Preferred  Share  purchasable  from time to time  hereunder upon exercise of the
Rights, all subject to further adjustment as provided herein.

         (h) Unless the Company shall have exercised its election as provided in
Section  11(i),  upon each  adjustment of the Purchase  Price as a result of the
calculations made in Section 11(b) and (c), each Right  outstanding  immediately
prior to the making of such adjustment  shall  thereafter  evidence the right to
purchase, at the adjusted Purchase Price, that number of one one-hundredths of a
Preferred  Share  (calculated  to the nearest one  one-millionth  of a Preferred
Share)  obtained by (i) multiplying  (x) the number of one  one-hundredths  of a
Preferred Share covered by a Right  immediately  prior to this adjustment by (y)
the  Purchase  Price  in  effect  immediately  prior to such  adjustment  of the
Purchase  Price and (ii) dividing the product so obtained by the Purchase  Price
in effect immediately after such adjustment of the Purchase Price.

         (i) The Company may elect on or after the date of any adjustment of the
Purchase  Price  to  adjust  the  number  of  Rights,  in  substitution  for any
adjustment in the number of one  one-hundredths of a Preferred Share purchasable
upon  the  exercise  of a  Right.  Each of the  Rights  outstanding  after  such
adjustment  of the number of Rights shall be  exercisable  for the number of one
one-hundredths   of  a  Preferred  Share  for  which  a  Right  was  exercisable
immediately  prior to such  adjustment.  Each Right held of record prior to such
adjustment  of  the  number  of  Rights  shall  become  that  number  of  Rights
(calculated  to the  nearest  one ten-  thousandth)  obtained  by  dividing  the
Purchase Price in effect  immediately  prior to adjustment of the Purchase Price
by the Purchase  Price in effect  immediately  after  adjustment of the Purchase
Price.  The Company shall make a public  announcement  of its election to adjust
the number of Rights,  indicating  the record date for the  adjustment,  and, if
known at the time, the amount of the adjustment to be made. This record date may
be the date on which the Purchase Price is adjusted or any day thereafter,  but,
if the Right Certificates have been issued, shall be at least 10 days later than
the date of the public  announcement.  If Right  Certificates  have been issued,
upon each adjustment of the number of Rights pursuant to this Section 11(i), the
Company shall, as promptly as practicable, cause to be distributed to holders of
record of Right Certificates on such record date Right Certificates  evidencing,
subject to Section 14 hereof,  the additional Rights to which such holders shall
be entitled as a result of such  adjustment,  or, at the option of the  Company,
shall cause to be  distributed  to such  holders of record in  substitution  and
replacement for the Right Certificates held by such holders prior to the date of
adjustment,  and upon surrender thereof,  if required by the Company,  new Right
Certificates  evidencing  all the Rights to which such holders shall be entitled
after such adjustment.  Right Certificates so to be distributed shall be issued,
executed  and  countersigned  in the  manner  provided  for  herein and shall be
registered  in the names of the holders of record of Right  Certificates  on the
record date specified in the public announcement.

                                       16.

<PAGE>

         (j)  Irrespective  of any adjustment or change in the Purchase Price or
the number of one one-hundredths of a Preferred Share issuable upon the exercise
of the Rights,  the Right  Certificates  theretofore  and thereafter  issued may
continue to express the Purchase Price and the number of one one-hundredths of a
Preferred  Share which were expressed in the initial Right  Certificates  issued
hereunder.

         (k) Before  taking any action that would cause an  adjustment  reducing
the Purchase Price below one one-hundredth of the then par value, if any, of the
Preferred  Shares  issuable upon exercise of the Rights,  the Company shall take
any corporate  action which may, in the opinion of its counsel,  be necessary in
order  that  the  Company   may  validly  and  legally   issue  fully  paid  and
nonassessable Preferred Shares at such adjusted Purchase Price.

         (l) In any  case  in  which  this  Section  11  shall  require  that an
adjustment  in the  Purchase  Price be made  effective as of a record date for a
specified  event,  the Company may elect to defer until the  occurrence  of such
event the issuing to the holder of any Right exercised after such record date of
the Preferred  Shares and other  capital stock or securities of the Company,  if
any,  issuable upon such  exercise on the basis of the Purchase  Price in effect
prior to such adjustment;  provided,  however, that the Company shall deliver to
such holder a due bill or other appropriate  instrument evidencing such holder's
right to  receive  such  additional  shares  upon the  occurrence  of the  event
requiring such adjustment.

         (m) The Company covenants and agrees that, after the Distribution Date,
it will not,  except as permitted  by Section 23 or Section 27 hereof,  take (or
permit any  Subsidiary  to take) any action the purpose of which is to, or if at
the time such action is taken it is  reasonably  foreseeable  that the effect of
such action is to, materially  diminish or eliminate the benefits intended to be
afforded by the Rights.

         (n) Anything in this Section 11 to the  contrary  notwithstanding,  the
Company  shall be entitled to make such  reductions  in the Purchase  Price,  in
addition to those adjustments  expressly  required by this Section 11, as and to
the extent that it in its sole  discretion  shall  determine  to be advisable in
order that any  consolidation or subdivision of the Preferred  Shares,  issuance
wholly for cash of any Preferred  Shares at less than the current  market price,
issuance wholly for cash of Preferred  Shares or securities which by their terms
are  convertible  into  or  exchangeable  for  Preferred  Shares,  dividends  on
Preferred Shares payable in Preferred  Shares or issuance of rights,  options or
warrants referred to hereinabove in Section 11(b), hereafter made by the Company
to holders of its Preferred Shares shall not be taxable to such stockholders.

         (o) In the event that at any time after the date of this  Agreement and
prior to the  Distribution  Date,  the  Company  shall  (i)  declare  or pay any
dividend  on the  Common  Shares  payable  in  Common  Shares  or (ii)  effect a
subdivision,   combination   or   consolidation   of  the   Common   Shares  (by
reclassification  or otherwise  than by payment of  dividends in Common  Shares)
into a greater or lesser number of Common Shares,  then in any such case (A) the
number of one  one-hundredths  of a Preferred Share purchasable after such event
upon proper exercise of each Right shall be determined by multiplying the number
of one one-hundredths of


                                       17.

<PAGE>

a Preferred Share so purchasable  immediately prior to such event by a fraction,
the  numerator of which is the number of Common Shares  outstanding  immediately
before such event and the  denominator  of which is the number of Common  Shares
outstanding  immediately after such event, and (B) each Common Share outstanding
immediately after such event shall have issued with respect to it that number of
Rights which each Common Share  outstanding  immediately prior to such event had
issued with respect to it. The  adjustments  provided for in this Section  11(o)
shall be made successively  whenever such a dividend is declared or paid or such
a subdivision, combination or consolidation is effected.

         (p) The exercise of Rights under Section 11(a)(ii) shall only result in
the loss of rights under Section  11(a)(ii) to the extent so exercised and shall
not  otherwise  affect the rights  represented  by the Rights  under this Rights
Agreement, including the rights represented by Section 13.

         Section 12. Certificate of Adjusted Purchase Price or Number of Shares.
Whenever an  adjustment  is made as  provided in Sections 11 and 13 hereof,  the
Company shall promptly (a) prepare a certificate  setting forth such adjustment,
and a brief statement of the facts accounting for such adjustment, (b) file with
the  Rights  Agent and with each  transfer  agent for the  Common  Shares or the
Preferred Shares a copy of such certificate and (c) mail a brief summary thereof
to each holder of a Right Certificate in accordance with Section 25 hereof.  The
Rights Agent shall be fully protected in relying on any such  certificate and on
any  adjustment  therein  contained and shall not be deemed to have knowledge of
any adjustment unless and until it shall have received such certificate.

         Section  13.  Consolidation,  Merger or Sale or  Transfer  of Assets or
Earning Power.

         (a) In the event that,  following the Shares Acquisition Date, directly
or indirectly  (x) the Company shall  consolidate  with, or merge with and into,
any other Person,  (y) any Person shall  consolidate with the Company,  or merge
with and into the Company,  and the Company shall be the continuing or surviving
corporation  of such  merger  (other  than,  in the case of  either  transaction
described in (x) or (y), a merger or consolidation  which would result in all of
the voting  power  represented  by the  securities  of the  Company  outstanding
immediately   prior  thereto   continuing  to  represent  (either  by  remaining
outstanding or by being converted into  securities of the surviving  entity) all
of the  voting  power  represented  by the  securities  of the  Company  or such
surviving entity outstanding  immediately after such merger or consolidation and
the holders of such  securities not having changed as a result of such merger or
consolidation),  or (z) the Company shall sell,  mortgage or otherwise  transfer
(or one or more of its subsidiaries shall sell, mortgage or otherwise transfer),
in one or more  transactions,  assets or earning power aggregating more than 50%
of the assets or earning power of the Company and its  subsidiaries  (taken as a
whole) to any other  Person,  (other than the Company or any  Subsidiary  of the
Company in one or more transactions each of which individually and the aggregate
does not violate  Section  13(d)  hereof)  then,  and in each such case,  proper
provision shall be made so that (i) following the Distribution Date, each holder
of a Right, subject to Section 11(a)(ii),  shall have the right to receive, upon
the  exercise  thereof  at a price  equal to the  then  current  Purchase  Price
multiplied by the number of one one-hundredths of a Preferred


                                       18.

<PAGE>

Share for which a Right is then exercisable in accordance with the terms of this
Agreement  and in lieu of  Preferred  Shares,  such  number  of shares of freely
tradeable  Common Shares of the Principal Party (as hereinafter  defined),  free
and  clear of  liens,  rights of call or first  refusal,  encumbrances  or other
adverse claims,  as shall be equal to the result obtained by (A) multiplying the
then current Purchase Price by the number of one  one-hundredths  of a Preferred
Share for which a Right is then  exercisable  (without  taking into  account any
adjustment  previously made pursuant to Section  11(a)(ii)  hereof) and dividing
that product by (B) 50% of the then current per share market price of the Common
Shares of such Principal Party (determined  pursuant to Section 11(d) hereof) on
the date of consummation of such consolidation,  merger, sale or transfer;  (ii)
such Principal Party shall thereafter be liable for, and shall assume, by virtue
of such consolidation,  merger, sale or transfer, all the obligations and duties
of the  Company  pursuant  to this  Agreement;  (iii) the term  "Company"  shall
thereafter be deemed to refer to such  Principal  Party,  it being  specifically
intended that the  provisions of Section 11 hereof shall apply to such Principal
Party; and (iv) such Principal Party shall take such steps  (including,  but not
limited  to,  the  reservation  of a  sufficient  number of shares of its Common
Shares in accordance with Section 9 hereof) in connection with such consummation
as may be necessary to assure that the  provisions  hereof shall  thereafter  be
applicable,  as nearly as  reasonably  may be, in relation to its Common  Shares
thereafter deliverable upon the exercise of the Rights.

         (b)      "Principal Party" shall mean:

                  (i) in the case of any transaction  described in (x) or (y) of
         the first sentence of Section  13(a),  the Person that is the issuer of
         any securities into which Common Shares of the Company are converted in
         such merger or consolidation,  and if no securities are so issued,  the
         Person  that  is  the  other  party  to  the  merger  or  consolidation
         (including,  if  applicable,  the  Company,  if  it  is  the  surviving
         corporation); and

                  (ii) in the case of any  transaction  described  in (z) of the
         first sentence in Section 13(a), the Person that is the party receiving
         the  greatest  portion  of the  assets  or  earning  power  transferred
         pursuant to such transaction or transactions;

provided, however, that in any case, (1) if the Common Shares of such Person are
not at such  time and have not been  continuously  over the  preceding  12-month
period  registered  under  Section 12 of the Exchange  Act, and such Person is a
direct or indirect  subsidiary or Affiliate of another  Person the Common Shares
of which are and have been so registered,  "Principal Party" shall refer to such
other Person;  (2) in case such Person is a subsidiary,  directly or indirectly,
or Affiliate of more than one Person,  the Common Shares of two or more of which
are and have been so registered,  "Principal  Party" shall refer to whichever of
such Persons is the issuer of the Common  Shares  having the greatest  aggregate
market value; and (3) in case such Person is owned, directly or indirectly, by a
joint  venture  formed by two or more  Persons  that are not owned,  directly or
indirectly,  by the same Person,  the rules set forth in (1) and (2) above shall
apply to each of the  chains of  ownership  having  an  interest  in such  joint
venture  as if such  party  were a  "subsidiary"  of  both or all of such  joint
venturers  and  the  Principal  Parties  in  each  such  chain  shall  bear  the
obligations  set forth in this  Section 13 in the same ratio as their  direct or
indirect interests in such Person bear to the total of such interests.


                                       19.

<PAGE>

         (c) The Company shall not  consummate any such  consolidation,  merger,
sale or transfer  unless the Principal  Party shall have a sufficient  number of
authorized shares of its Common Shares that have not been issued or reserved for
issuance to permit the  exercise in full of the Rights in  accordance  with this
Section 13 and unless  prior  thereto the Company and each  Principal  Party and
each  other  Person  who may  become  a  Principal  Party  as a  result  of such
consolidation, merger, sale or transfer shall have executed and delivered to the
Rights  Agent a  supplemental  agreement  providing  for the  terms set forth in
paragraphs (a) and (b) of this Section 13 and further providing that, as soon as
practicable  after the date of any  consolidation,  merger,  sale or transfer of
assets mentioned in paragraph (a) of this Section 13, the Principal Party at its
own expense will:

                  (i) prepare and file a  registration  statement  under the Act
         with respect to the Rights and the securities purchasable upon exercise
         of the  Rights on an  appropriate  form,  will use its best  efforts to
         cause  such  registration  statement  to  become  effective  as soon as
         practicable  after such  filing and will use its best  efforts to cause
         such  registration  statement to remain effective (with a prospectus at
         all  times  meeting  the  requirements  of the  Act)  until  the  Final
         Expiration Date;

                  (ii) use its best  efforts to qualify or  register  the Rights
         and the  securities  purchasable  upon exercise of the Rights under the
         blue sky laws of such jurisdictions as may be necessary or appropriate;
         and

                  (iii)  deliver to holders of the Rights  historical  financial
         statements  for the Principal  Party and each of its  Affiliates  which
         comply in all material  respects with the requirements for registration
         on Form 10 under the Exchange Act.

The provisions of this Section 13 shall similarly apply to successive mergers or
consolidations or sales or other transfers.

         (d) After the Distribution  Date, the Company covenants and agrees that
it shall not (i)  consolidate  with,  (ii) merge with or into,  or (iii) sell or
transfer to, in one or more  transactions,  assets or earning power  aggregating
more than 50% of the assets or earning power of the Company and its subsidiaries
taken as a whole,  any other Person (other than a Subsidiary of the Company in a
transaction which does not violate Section 11(m) hereof),  if (x) at the time of
or after  such  consolidation,  merger or sale  there are any  charter  or bylaw
provisions  or  any  rights,   warrants  or  other   instruments  or  securities
outstanding, agreements in effect or any other action taken which would diminish
or otherwise eliminate the benefits intended to be afforded by the Rights or (y)
prior to, simultaneously with or immediately after such consolidation, merger or
sale, the stockholders of the Person who constitutes,  or would constitute,  the
"Principal  Party" for purposes of Section  13(a)  hereof shall have  received a
distribution of Rights  previously owned by such Person or any of its Affiliates
and  Associates.  The Corporation  shall not consummate any such  consolidation,
merger,  sale or transfer unless prior thereto the Company and such other Person
shall have executed and delivered to the Rights Agent a  supplemental  agreement
evidencing compliance with this Section 13(d).


                                       20.

<PAGE>

         Section 14.  Fractional Rights and Fractional Shares.

         (a) The Company  shall not be required to issue  fractions of Rights or
to distribute Right  Certificates  which evidence  fractional Rights. In lieu of
such  fractional  Rights,  there shall be paid to the registered  holders of the
Right  Certificates  with regard to which such fractional Rights would otherwise
be issuable,  an amount in cash equal to the same fraction of the current market
value of a whole  Right.  For the purposes of this  Section  14(a),  the current
market  value of a whole Right shall be the closing  price of the Rights for the
Trading Day immediately  prior to the date on which such fractional Rights would
have been  otherwise  issuable.  The closing price for any day shall be the last
sale price,  regular  way, or, in case no such sale takes place on such day, the
average of the  closing  bid and asked  prices,  regular  way, in either case as
reported in the principal consolidated transaction reporting system with respect
to securities  listed or admitted to trading on the New York Stock  Exchange or,
if the  Rights  are not  listed or  admitted  to  trading  on the New York Stock
Exchange, as reported in the principal consolidated transaction reporting system
with respect to securities listed on the principal national  securities exchange
on which the Rights  are listed or  admitted  to trading or as  reported  on the
Nasdaq  National  Market or, if the Rights are not listed or admitted to trading
on any national  securities  exchange or reported on the Nasdaq National Market,
the last quoted price or, if not so quoted,  the average of the high bid and low
asked prices in the over-the-counter market, as reported by Nasdaq or such other
system then in use or, if on any such date the Rights are not quoted by any such
organization,  the average of the closing bid and asked prices as furnished by a
professional market maker making a market in the Rights selected by the Board of
Directors of the  Company.  If on any such date no such market maker is making a
market in the Rights, the fair value of the Rights on such date as determined in
good faith by the Board of Directors of the Company shall be used.

         (b) The Company  shall not be required to issue  fractions of Preferred
Shares (other than fractions which are integral  multiples of one  one-hundredth
of a Preferred Share) upon exercise of the Rights or to distribute  certificates
which  evidence  fractional  Preferred  Shares (other than  fractions  which are
integral  multiples of one  one-hundredth  of a Preferred  Share).  Fractions of
Preferred Shares in integral multiples of one one-hundredth of a Preferred Share
may, at the  election of the  Company,  be  evidenced  by  depositary  receipts;
provided,  however,  that holders of such depositary  receipts shall have all of
the designations and the powers, preferences and rights, and the qualifications,
limitations and restrictions to which they are entitled as beneficial  owners of
the  Preferred  Shares  represented  by  such  depositary  receipts.  In lieu of
fractional Preferred Shares that are not integral multiples of one one-hundredth
of a Preferred Share,  the Company shall pay to the registered  holders of Right
Certificates  at the time such Rights are exercised as herein provided an amount
in cash equal to the same fraction of the current  market value of one Preferred
Share.  For the purposes of this Section  14(b),  the current  market value of a
Preferred  Share shall be the current per share  market  price of the  Preferred
Shares (as  determined  pursuant  to the  second  sentence  of Section  11(d)(i)
hereof) for the Trading Day immediately  prior to the date of such exercise (or,
if not publicly traded, in accordance with Section 11(d)(ii)).



                                       21.

<PAGE>

         (c)  Following  the  occurrence  of one of the  transactions  or events
specified  in Section  11 giving  rise to the right to  receive  Common  Shares,
capital stock equivalents (other than Preferred Shares) or other securities upon
the exercise of a Right, the Company shall not be required to issue fractions of
Common Shares or units of such Common Shares, capital stock equivalents or other
securities  upon  exercise  of the Rights or to  distribute  certificates  which
evidence   fractional   Common  Shares,   capital  stock  equivalents  or  other
securities.  In lieu of fractional  Common Shares,  capital stock equivalents or
other  securities,  the  Company  shall pay to the  registered  holders of Right
Certificates  at the time such Rights are exercised as herein provided an amount
in cash equal to the same  fraction  of the current  market  value of one Common
Share  or unit  of such  Common  Shares,  capital  stock  equivalents  or  other
securities.  For purposes of this Section 14(c),  the current market value shall
be the  current  per share  market  price (as  determined  pursuant  to  Section
11(d)(i)  hereof)  for the  Trading  Day  immediately  prior to the date of such
exercise and, if such capital stock equivalent is not traded,  each such capital
stock equivalent shall have the value of one one-hundredth of a Preferred Share.

         (d) The  holder of a Right by the  acceptance  of the  Right  expressly
waives his right to receive any fractional  Rights or any fractional shares upon
exercise of a Right (except as provided above).

         Section 15.  Rights of Action.  All rights of action in respect of this
Agreement,  excepting  the  rights of action  given to the  Rights  Agent  under
Sections 18 and 20 hereof,  are vested in the respective  registered  holders of
the Right  Certificates  (and,  prior to the  Distribution  Date, the registered
holders of the Common Shares) and any registered holder of any Right Certificate
(or, prior to the Distribution Date, of the Common Shares),  without the consent
of the Rights Agent or of the holder of any other Right  Certificate  (or, prior
to the Distribution Date, of the Common Shares),  may, in his own behalf and for
his own benefit,  enforce,  and may institute  and maintain any suit,  action or
proceeding  against the Company to enforce,  or otherwise act in respect of, his
right to exercise the Rights  evidenced by such Right  Certificate in the manner
provided in such Right  Certificate and in this Agreement.  Without limiting the
foregoing or any remedies available to the holders of Rights, it is specifically
acknowledged that the holders of Rights would not have an adequate remedy at law
for any breach of this Agreement and will be entitled to specific performance of
the  obligations  under,  and  injunctive  relief  against  actual or threatened
violations of the obligations of any Person subject to, this Agreement.  Holders
of Rights  shall be  entitled  to recover  the  reasonable  costs and  expenses,
including  attorneys  fees,  incurred  by  them in any  action  to  enforce  the
provisions of this Agreement.

         Section 16.  Agreement of Right  Holders.  Every holder of a Right,  by
accepting  the same,  consents  and agrees with the Company and the Rights Agent
and with every other holder of a Right that:

                  (a)  prior  to the  Distribution  Date,  the  Rights  will  be
transferable only in connection with the transfer of the Common Shares;


                                       22.

<PAGE>

                  (b) after the  Distribution  Date, the Right  Certificates are
transferable  only on the registry  books of the Rights Agent if  surrendered at
the principal  office of the Rights Agent,  duly  endorsed or  accompanied  by a
proper instrument of transfer; and

                  (c) the  Company  and the Rights  Agent may deem and treat the
person in whose name the Right Certificate (or, prior to the Distribution  Date,
the associated  Common Shares  certificate)  is registered as the absolute owner
thereof and of the Rights evidenced  thereby  (notwithstanding  any notations of
ownership or writing on the Right  Certificates or the associated  Common Shares
certificate  made by anyone other than the Company or the Rights  Agent) for all
purposes  whatsoever,  and neither  the  Company  nor the Rights  Agent shall be
affected by any notice to the contrary.

         Section  17.  Right  Certificate  Holder Not Deemed a  Stockholder.  No
holder,  as such, of any Right  Certificate  shall be entitled to vote,  receive
dividends or be deemed for any purpose the holder of the Preferred Shares or any
other  securities  of the  Company  which  may at any  time be  issuable  on the
exercise of the Rights represented  thereby, nor shall anything contained herein
or in any Right  Certificate be construed to confer upon the holder of any Right
Certificate,  as such,  any of the rights of a stockholder of the Company or any
right to vote for the  election of  directors  or upon any matter  submitted  to
stockholders  at any  meeting  thereof,  or to give or  withhold  consent to any
corporate  action,  or to receive notice of meetings or other actions  affecting
stockholders  (except as provided in Section 25 hereof), or to receive dividends
or subscription  rights,  or otherwise,  until the Right or Rights  evidenced by
such  Right  Certificate  shall  have  been  exercised  in  accordance  with the
provisions hereof.

         Section 18.  Concerning the Rights Agent.  The Company agrees to pay to
the  Rights  Agent  reasonable  compensation  for all  services  rendered  by it
hereunder and, from time to time, on demand of the Rights Agent,  its reasonable
expenses and counsel fees and other disbursements incurred in the administration
and execution of this  Agreement and the exercise and  performance of its duties
hereunder.  The Company  also agrees to  indemnify  the Rights Agent for, and to
hold it harmless  against,  any loss,  liability,  or expense,  incurred without
gross  negligence,  bad faith or  willful  misconduct  on the part of the Rights
Agent,  for anything done or omitted by the Rights Agent in connection  with the
acceptance  and  administration  of this  Agreement,  including  the  costs  and
expenses  of  defending  against any claim of  liability  in the  premises.  The
indemnity  provided  herein shall  survive the  expiration of the Rights and the
termination of this Agreement.

         The Rights Agent shall be protected  and shall incur no liability  for,
or in respect of any action taken, suffered or omitted by it in connection with,
its  administration  of this Agreement in reliance upon any Right Certificate or
certificate for the Preferred Shares or Common Shares or for other securities of
the  Company,   instrument  of  assignment  or  transfer,   power  of  attorney,
endorsement,   affidavit,  letter,  notice,  direction,   consent,  certificate,
statement,  or other  paper or  document  believed by it to be genuine and to be
signed, executed and, where necessary,  verified or acknowledged,  by the proper
person or  persons,  or  otherwise  upon the  advice of  counsel as set forth in
Section 20 hereof.


                                       23.

<PAGE>

         Section 19. Merger or  Consolidation or Change of Name of Rights Agent.
Any corporation into which the Rights Agent or any successor Rights Agent may be
merged or with which it may be consolidated,  or any corporation  resulting from
any merger or  consolidation  to which the Rights Agent or any successor  Rights
Agent  shall  be a  party,  or any  corporation  succeeding  to the  shareholder
services or corporate trust business of the Rights Agent or any successor Rights
Agent,  shall be the successor to the Rights Agent under this Agreement  without
the  execution  or filing of any paper or any  further act on the part of any of
the parties hereto,  provided,  however that such corporation  would be eligible
for  appointment as a successor  Rights Agent under the provisions of Section 21
hereof.  In case at the time such  successor  Rights Agent shall  succeed to the
agency created by this Agreement any of the Right  Certificates  shall have been
countersigned  but not delivered,  any such successor Rights Agent may adopt the
countersignature  of  the  predecessor  Rights  Agent  and  deliver  such  Right
Certificates  so  countersigned;  and in  case  at that  time  any of the  Right
Certificates shall not have been  countersigned,  any successor Rights Agent may
countersign such Right Certificates either in the name of the predecessor Rights
Agent or in the name of the successor  Rights Agent;  and in all such cases such
Right  Certificates shall have the full force provided in the Right Certificates
and in this Agreement.

         In case at any time the name of the Rights  Agent  shall be changed and
at such time any of the Right Certificates shall have been countersigned but not
delivered,  the Rights Agent may adopt the countersignature under its prior name
and deliver Right Certificates so countersigned; and in case at that time any of
the Right Certificates shall not have been  countersigned,  the Rights Agent may
countersign such Right  Certificates  either in its prior name or in its changed
name;  and in all such cases such Right  Certificates  shall have the full force
provided in the Right Certificates and in this Agreement.

         Section 20. Duties of Rights  Agent.  The Rights Agent  undertakes  the
duties and  obligations  imposed by this Agreement upon the following  terms and
conditions,  by all of which the Company and the holders of Right  Certificates,
by their acceptance thereof, shall be bound:

         (a) The Rights Agent may consult with legal  counsel of its choice (who
may be legal counsel for the Company),  and the opinion of such counsel shall be
full and complete  authorization  and  protection  to the Rights Agent as to any
action taken or omitted by it in good faith and in accordance with such opinion.

         (b) Whenever in the  performance of its duties under this Agreement the
Rights Agent shall deem it  necessary  or  desirable  that any fact or matter be
proved or  established  by the Company  prior to taking or suffering  any action
hereunder,  such fact or matter  (unless  other  evidence in respect  thereof be
herein  specifically  prescribed)  may be deemed to be  conclusively  proved and
established by a certificate signed by any one of the Chairman of the Board, the
Chief Executive Officer,  the President,  the Chief Financial Officer,  any Vice
President,  the  Treasurer or the  Secretary of the Company and delivered to the
Rights Agent;  and such  certificate  shall be full  authorization to the Rights
Agent for any action taken or suffered in good faith by it under the  provisions
of this Agreement in reliance upon such certificate.


                                       24.

<PAGE>

         (c) The Rights  Agent shall be liable  hereunder to the Company and any
other Person only for its own gross negligence, bad faith or willful misconduct.

         (d) The Rights Agent shall not be liable for or by reason of any of the
statements  of fact or  recitals  contained  in this  Agreement  or in the Right
Certificates (except its countersignature  thereof) or be required to verify the
same, but all such  statements and recitals are and shall be deemed to have been
made by the Company only.

         (e) The Rights Agent shall not be under any  responsibility  in respect
of the validity of this  Agreement or the execution and delivery  hereof (except
the due  execution  hereof by the Rights Agent) or in respect of the validity or
execution of any Right Certificate (except its  countersignature  thereof);  nor
shall it be  responsible  for any  breach  by the  Company  of any  covenant  or
condition contained in this Agreement or in any Right Certificate;  nor shall it
be responsible for any change in the exercisability of the Rights (including the
Rights becoming void pursuant to Section  11(a)(ii) hereof) or any adjustment in
the terms of the  Rights  (including  the  manner,  method  or  amount  thereof)
provided  for in  Section  3,  11,  13,  23 or 24,  or the  ascertaining  of the
existence of facts that would require any such change or adjustment (except with
respect to the exercise of Rights evidenced by Right  Certificates after receipt
of a certificate  pursuant to Section 12 describing  such change or adjustment);
nor  shall it by any act  hereunder  be  deemed  to make any  representation  or
warranty as to the  authorization  or reservation of any Preferred  Shares to be
issued pursuant to this Agreement or any Right  Certificate or as to whether any
Preferred Shares will, when issued, be validly authorized and issued, fully paid
and nonassessable.

         (f) The Company agrees that it will perform,  execute,  acknowledge and
deliver or cause to be performed, executed,  acknowledged and delivered all such
further and other acts, instruments and assurances as may reasonably be required
by the Rights Agent for the carrying  out or  performing  by the Rights Agent of
the provisions of this Agreement.

         (g) The  Rights  Agent is  hereby  authorized  and  directed  to accept
instructions  with respect to the  performance of its duties  hereunder from any
one of the Chairman of the Board,  the Chief Executive  Officer,  the President,
the Chief Financial Officer, any Vice President,  the Secretary or the Treasurer
of the  Company,  and to apply to such  officers for advice or  instructions  in
connection  with its duties,  and it shall not be liable for any action taken or
suffered by it in good faith in accordance with instructions of any such officer
or for any delay in acting while waiting for those instructions. Any application
by the Rights Agent for written instructions from the Company may, at the option
of the Rights  Agent,  set forth in writing  any action  proposed to be taken or
omitted by the Rights Agent with respect to its duties or obligations under this
Rights  Agreement  and the date on and/or after which such action shall be taken
or omitted  and the  Rights  Agent  shall not be liable for any action  taken or
omitted in accordance  with a proposal  included in any such  application  on or
after the date  specified  therein  (which  date  shall  not be less than  three
business  days  after the date  indicated  in such  application  unless any such
officer shall have  consented in writing to an earlier  date)  unless,  prior to
taking or  omitting  any such  action,  the Rights  Agent has  received  written
instructions in response to such  application  specifying the action to be taken
or omitted.

                                       25.

<PAGE>

         (h) The Rights Agent and any stockholder, director, officer or employee
of the  Rights  Agent  may  buy,  sell  or deal in any of the  Rights  or  other
securities of the Company or become pecuniarily interested in any transaction in
which the  Company  may be  interested,  or  contract  with or lend money to the
Company or otherwise  act as fully and freely as though it were not Rights Agent
under this Agreement. Nothing herein shall preclude the Rights Agent from acting
in any other capacity for the Company or for any other legal entity.

         (i) The Rights  Agent may  execute  and  exercise  any of the rights or
powers hereby vested in it or perform any duty hereunder  either itself or by or
through its attorneys or agents, and the Rights Agent shall not be answerable or
accountable for any act, default, neglect or misconduct of any such attorneys or
agents or for any loss to the  Company  resulting  from any such  act,  default,
neglect or misconduct,  provided  reasonable care was exercised in the selection
and continued employment thereof.

         (j) No provision of this  Agreement  shall  require the Rights Agent to
expend or risk its own funds or otherwise  incur any financial  liability in the
performance  of any of its duties  hereunder or in the exercise of its rights if
there shall be reasonable  grounds for believing that repayment of such funds or
adequate  indemnification  against  such  risk or  liability  is not  reasonably
assured to it.

         (k) If, with respect to any Right Certificate surrendered to the Rights
Agent  for  exercise  or  transfer,  the  certificate  attached  to the  form of
assignment  or form of  election to  purchase,  as the case may be, has not been
executed,  the Rights  Agent shall not take any further  action with  respect to
such requested exercise of transfer without first consulting with the Company.

         Section 21. Change of Rights  Agent.  The Rights Agent or any successor
Rights Agent may resign and be discharged  from its duties under this  Agreement
upon 30 days' notice in writing mailed to the Company and to each transfer agent
for the Common Shares or Preferred  Shares by registered or certified  mail, and
to the holders of the Right  Certificates  by first-class  mail. The Company may
remove the Rights  Agent or any  successor  Rights Agent upon 30 days' notice in
writing,  mailed to the Rights Agent or successor  Rights Agent, as the case may
be, and to each  transfer  agent for the Common  Shares or  Preferred  Shares by
registered or certified  mail, and to the holders of the Right  Certificates  by
first-class  mail.  If the  Rights  Agent  shall  resign or be  removed or shall
otherwise become  incapable of acting,  the Company shall appoint a successor to
the Rights Agent.  If the Company shall fail to make such  appointment  within a
period  of 30 days  after  giving  notice of such  removal  or after it has been
notified  in writing of such  resignation  or  incapacity  by the  resigning  or
incapacitated  Rights Agent or by the holder of a Right  Certificate (who shall,
with such notice,  submit his Right  Certificate for inspection by the Company),
then the registered  holder of any Right  Certificate  may apply to any court of
competent  jurisdiction for the appointment of a new Rights Agent. Any successor
Rights Agent,  whether  appointed by the Company or by such a court,  shall be a
corporation  organized and doing business under the laws of the United States or
of any other state of the United States which is  authorized  under such laws to
exercise  corporate trust or stock transfer powers and is subject to supervision
or examination by federal or state authority and which has at the time of


                                       26.

<PAGE>

its  appointment as Rights Agent a combined  capital and surplus of at least $50
million. After appointment,  the successor Rights Agent shall be vested with the
same powers,  rights,  duties and  responsibilities as if it had been originally
named as Rights Agent without  further act or deed; but the  predecessor  Rights
Agent shall deliver and transfer to the  successor  Rights Agent any property at
the time held by it  hereunder,  and execute and deliver any further  assurance,
conveyance,  act or deed necessary for the purpose. Not later than the effective
date of any such  appointment  the Company shall file notice  thereof in writing
with the predecessor  Rights Agent and each transfer agent for the Common Shares
or  Preferred  Shares,  and mail a notice  thereof in writing to the  registered
holders of the Right  Certificates.  Failure to give any notice  provided for in
this Section 21, however,  or any defect therein,  shall not affect the legality
or validity of the resignation or removal of the Rights Agent or the appointment
of the successor Rights Agent, as the case may be.

         Section 22. Issuance of New Right Certificates.  Notwithstanding any of
the provisions of this  Agreement or of the Rights to the contrary,  the Company
may, at its option, issue new Right Certificates  evidencing Rights in such form
as may be approved by its Board of Directors to reflect any adjustment or change
in the  Purchase  Price  and the  number  or kind or  class of  shares  or other
securities  or  property  purchasable  under  the  Right  Certificates  made  in
accordance  with the provisions of this  Agreement.  In addition,  in connection
with the issuance or sale of Common Shares following the  Distribution  Date and
prior to the earlier of the Redemption Date and the Final  Expiration  Date, the
Company (a) shall with  respect to Common  Shares so issued or sold  pursuant to
the  exercise of stock  options or under any  employee  plan or  arrangement  in
existence prior to the  Distribution  Date, or upon the exercise,  conversion or
exchange  of  securities,  notes or  debentures  issued  by the  Company  and in
existence  prior to the  Distribution  Date,  and (b) may, in any other case, if
deemed necessary or appropriate by the Board of Directors of the Company,  issue
Right  Certificates  representing the appropriate number of Rights in connection
with such issuance or sale; provided, however, that (i) the Company shall not be
obligated to issue any such Right  Certificates  if, and to the extent that, the
Company  shall  be  advised  by  counsel  that  such  issuance  would  create  a
significant  risk of  material  adverse tax  consequences  to the Company or the
Person  to whom  such  Right  Certificate  would  be  issued,  and (ii) no Right
Certificate shall be issued if, and to the extent that,  appropriate  adjustment
shall otherwise have been made in lieu of the issuance thereof.

         Section 23.  Redemption.

         (a) The  Rights  may be  redeemed  by action of the Board of  Directors
pursuant to  subsection  (b) of this Section 23 and shall not be redeemed in any
other manner.

         (b)(i) The Board of Directors of the Company may, at its option, at any
time  prior to the  earlier of (ii) the Shares  Acquisition  Date;  or (iii) the
Final Expiration Date,  redeem all but not less than all of the then outstanding
Rights at a  redemption  price of $.001 per  Right,  appropriately  adjusted  to
reflect any stock split, stock dividend or similar  transaction  occurring after
the date hereof  (such  redemption  price being  hereinafter  referred to as the
"Redemption  Price"),  and the Company  may, at its option,  pay the  Redemption
Price in Common  Shares  (based on the  "current  per share  market  price,"  as
defined in Section 11(d) hereof, of the


                                       27.

<PAGE>

Common  Shares  at  the  time  of  redemption),   cash  or  any  other  form  of
consideration deemed appropriate by the Board of Directors;  provided,  however,
that upon a Change in Majority of Directors,  no such  redemption  shall be made
until 180 days after such Change in Majority of Directors. The redemption of the
Rights by the Board of Directors  may be made  effective  at such time,  on such
basis and  subject  to such  conditions  as the Board of  Directors  in its sole
discretion may establish.  Notwithstanding  anything contained in this Agreement
to the  contrary,  the  Rights  shall not be  exercisable  pursuant  to  Section
11(a)(ii)  hereof prior to the expiration or termination of the Company's  right
of redemption under this Section 23(b)(i).

         (ii) In  addition,  the Board of  Directors  of the Company may, at its
option,  at any time after the time a person becomes an Acquiring Person and the
expiration  of any period  during  which the holder of Rights may  exercise  the
rights under Section  11(a)(ii) but prior to any event  described in (x), (y) or
(z) of the first sentence of Section 13, redeem all but not less than all of the
then  outstanding  Rights at the  Redemption  Price (x) in  connection  with any
merger,  consolidation  or sale or other  transfer (in one  transaction  or in a
series of related  transactions)  of assets or earning power  aggregating 50% or
more of the assets or earning power of the Company and its  subsidiaries  (taken
as a whole) in which all  holders  of Common  Shares are  treated  alike and not
involving  (other than as a holder of Common Shares being treated like all other
such holders) an Interested Stockholder or a Transaction Person or (y)(A) if and
for so long as the Acquiring  Person is not thereafter  the Beneficial  Owner of
15% or more of the Company's then outstanding Common Shares, and (B) at the time
of redemption no other Persons are Acquiring Persons.

         (c)  Immediately  upon the  action  of the  Board of  Directors  of the
Company ordering the redemption of the Rights pursuant to subsection (b) of this
Section 23, and without any further action and without any notice,  the right to
exercise the Rights will terminate and the only right  thereafter of the holders
of Rights shall be to receive the Redemption  Price.  The Company shall promptly
give public notice of any such redemption;  provided,  however, that the failure
to give, or any defect in, any such notice shall not affect the validity of such
redemption.  Within 10 days after such action of the Board of Directors ordering
the redemption of the Rights pursuant to subsection (b) the Company shall mail a
notice of redemption to all the holders of the then outstanding  Rights at their
last  addresses as they appear upon the  registry  books of the Rights Agent or,
prior to the Distribution  Date, on the registry books of the transfer agent for
the Common  Shares.  Any notice  which is mailed in the manner  herein  provided
shall be deemed given,  whether or not the holder receives the notice. Each such
notice  of  redemption  will  state  the  method  by which  the  payment  of the
Redemption Price will be made.  Neither the Company nor any of its Affiliates or
Associates  may redeem,  acquire or purchase for value any Rights at any time in
any  manner  other  than that  specifically  set forth in this  Section 23 or in
Section 24 hereof,  and other than in  connection  with the  purchase  of Common
Shares prior to the Distribution Date.

         (d) The Company may, at its option,  discharge  all of its  obligations
with respect to the Rights by (i) issuing a press release  announcing the manner
of redemption of the Rights and (ii) mailing payment of the Redemption  Price to
the  registered  holders of the Rights at their last addresses as they appear on
the registry books of the Rights Agent or, prior to the Distribution


                                       28.

<PAGE>

Date, on the registry  books of the transfer  agent for the Common  Shares,  and
upon such action,  all  outstanding  Right  Certificates  shall be null and void
without any further action by the Company.

         Section 24.  Exchange.

         (a) The Board of Directors  of the Company  may, at its option,  at any
time after any Person becomes an Acquiring  Person,  exchange all or part of the
then  outstanding  and  exercisable  Rights (which shall not include Rights that
have become void  pursuant to the  provisions of Section  11(a)(ii)  hereof) for
Common Shares at an exchange ratio of one Common Share per Right,  appropriately
adjusted  to reflect any stock  split,  stock  dividend  or similar  transaction
occurring after the date hereof (such exchange ratio being hereinafter  referred
to as the  "Exchange  Ratio").  Notwithstanding  the  foregoing,  the  Board  of
Directors  shall not be empowered to effect such  exchange at any time after any
Person  (other than the Company,  any  Subsidiary  of the Company,  any employee
benefit plan of the Company or any such Subsidiary, or any entity holding Common
Shares  for or  pursuant  to the  terms of any  such  plan),  together  with all
Affiliates and Associates of such Person, becomes the Beneficial Owner of 50% or
more of the Common Shares then outstanding.

         (b)  Immediately  upon the  action  of the  Board of  Directors  of the
Company  ordering the exchange of any Rights  pursuant to subsection (a) of this
Section 24 and without any further  action and without any notice,  the right to
exercise such Rights shall  terminate and the only right  thereafter of a holder
of such Rights  shall be to receive  that number of Common  Shares  equal to the
number of such Rights held by such holder  multiplied by the Exchange Ratio. The
Company  shall  promptly  give  public  notice of any such  exchange;  provided,
however,  that the  failure to give,  or any defect in,  such  notice  shall not
affect the validity of such exchange.  The Company  promptly shall mail a notice
of any  such  exchange  to all of the  holders  of such  Rights  at  their  last
addresses as they appear upon the registry books of the Rights Agent. Any notice
which is mailed in the manner herein provided shall be deemed given,  whether or
not the holder receives the notice.  Each such notice of exchange will state the
method by which the  exchange  of the Common  Shares for Rights will be effected
and, in the event of any partial  exchange,  the number of Rights  which will be
exchanged.  Any partial  exchange shall be effected pro rata based on the number
of Rights (other than Rights which have become void  pursuant to the  provisions
of Section 11(a)(ii) hereof) held by each holder of Rights.

         (c) In lieu of  issuing  shares  of  Common  Stock in  accordance  with
Section 24(a)  hereof,  the Company may, if a majority of the Board of Directors
then in office  determines  that such action is necessary or appropriate and not
contrary to the interests of the holders of Rights,  elect to (and, in the event
that there are not sufficient treasury shares and authorized but unissued shares
of Common Stock to permit any exchange of the Rights in accordance  with Section
24(a), the Company shall) take all such action as may be necessary to authorize,
issue or pay,  upon the  exchange of the  Rights,  cash  (including  by way of a
reduction  of the  Purchase  Price),  property,  shares of Common  Stock,  other
securities or any  combination  thereof  having an aggregate  value equal to the
value of the shares of Common  Stock which  otherwise  would have been  issuable
pursuant to Section 24(a), which aggregate value shall be determined by a


                                       29.

<PAGE>

nationally  recognized  investment  banking  firm  selected by a majority of the
Board of  Directors.  For purposes of the preceding  sentence,  the value of the
Common Stock shall be determined  pursuant to Section 11(d) hereof and the value
of any  preferred  stock or  preference  stock  which a majority of the Board of
Directors  determines to be a "common stock  equivalent" shall be deemed to have
the same value as the Common Stock.  Any such election by the Board of Directors
must be made and publicly  announced  within 60 days following the date on which
the event  described in Section  11(a)(ii)  shall have  occurred.  Following the
occurrence of the event described in Section 11(a)(ii) hereof, a majority of the
Board of Directors then in office may suspend the  exercisability  of the Rights
for a period of up to 60 days following the date on which the event described in
Section 11(a)(ii) shall have occurred to the extent that such directors have not
determined  whether to  exercise  their  rights of election  under this  Section
24(c).  In the event of any such  suspension,  the Company  shall issue a public
announcement  stating that the exercisability of the Rights has been temporarily
suspended.

         (d) The  Company  shall not be required  to issue  fractions  of Common
Shares or to distribute certificates which evidence fractional Common Shares. In
lieu of such fractional  Common Shares,  the Company shall pay to the registered
holders of the Right  Certificates  with regard to which such fractional  Common
Shares would  otherwise be issuable an amount in cash equal to the same fraction
of the current  market value of a whole Common  Share.  For the purposes of this
subsection  (d),  the current  market value of a whole Common Share shall be the
closing price of a Common Share (as determined  pursuant to the second  sentence
of Section  11(d)(i)  hereof) for the Trading Day immediately  after the date of
the first public  announcement by the Company that an exchange is to be effected
pursuant to this Section 24.

         (e) The Company  shall not be required to issue  fractions of Preferred
Shares (other than fractions which are integral  multiples of one  one-hundredth
of a Preferred Share) upon exchange of the Rights or to distribute  certificates
which  evidence  fractional  Preferred  Shares (other than  fractions  which are
integral  multiples of one  one-hundredth  of a Preferred  Share).  Fractions of
Preferred Shares in integral multiples of one one-hundredth of a Preferred Share
may, at the  election of the  Company,  be  evidenced  by  depositary  receipts;
provided,  however,  that holders of such depositary  receipts shall have all of
the designations and the powers, preferences and rights, and the qualifications,
limitations and restrictions to which they are entitled as beneficial  owners of
the  Preferred  Shares  represented  by  such  depositary  receipts.  In lieu of
fractional Preferred Shares that are not integral multiples of one one-hundredth
of a Preferred Share,  the Company shall pay to the registered  holders of Right
Certificates  at the time such Rights are exercised as herein provided an amount
in cash equal to the same fraction of the current  market value of one Preferred
Share.  For the purposes of this Section  24(e),  the current  market value of a
Preferred  Share shall be one hundred  (100) times the closing price of a Common
Share (as determined pursuant to the second sentence of Section 11(d)(i) hereof)
for the Trading Day immediately after the date of the first public  announcement
by the Company that an exchange is to be effected pursuant to this Section 24.


                                       30.

<PAGE>

         Section 25.  Notice of Certain Events.

         (a) In case the Company shall  propose (i) to pay any dividend  payable
in stock of any  class to the  holders  of its  Preferred  Shares or to make any
other  distribution to the holders of its Preferred Shares (other than a regular
quarterly cash dividend),  (ii) to offer to the holders of its Preferred  Shares
rights or warrants to  subscribe  for or to purchase  any  additional  Preferred
Shares  or  shares  of stock of any  class or any  other  securities,  rights or
options,  (iii) to effect any  reclassification  of its Preferred  Shares (other
than a reclassification  involving only the subdivision of outstanding Preferred
Shares),  (iv) to effect any  consolidation or merger into or with, or to effect
any sale or other  transfer  (or to permit  one or more of its  Subsidiaries  to
effect any sale or other transfer), in one or more transactions,  of 50% or more
of the assets or earning power of the Company and its  Subsidiaries  (taken as a
whole),  to any other  Person,  (v) to effect the  liquidation,  dissolution  or
winding up of the Company,  or (vi) to declare or pay any dividend on the Common
Shares  payable  in Common  Shares or to effect a  subdivision,  combination  or
consolidation  of the Common Shares (by  reclassification  or otherwise  than by
payment of dividends in Common  Shares),  then,  in each such case,  the Company
shall give to each holder of a Right Certificate,  in accordance with Section 26
hereof,  a notice of such proposed  action,  which shall specify the record date
for the purpose of such stock  dividend,  or distribution of rights or warrants,
or the  date  on  which  such  reclassification,  consolidation,  merger,  sale,
transfer, liquidation,  dissolution, or winding up is to take place and the date
of  participation  therein  by the  holders  of the  Common  Shares  and/or  the
Preferred  Shares,  if any such date is to be fixed, and such notice shall be so
given in the case of any action  covered by clause (i) or (ii) above at least 10
days prior to the record date for  determining  holders of the Preferred  Shares
for purposes of such action,  and in the case of any such other action, at least
10 days prior to the date of the taking of such  proposed  action or the date of
participation  therein by the holders of the Common  Shares and/or the Preferred
Shares, whichever shall be the earlier.

         (b) In case the event  set  forth in  Section  11(a)(ii)  hereof  shall
occur,  then the Company shall as soon as  practicable  thereafter  give to each
holder of a Right Certificate, in accordance with Section 26 hereof, a notice of
the  occurrence  of such event,  which notice  shall  describe the event and the
consequences of the event to holders of Rights under Section 11(a)(ii) hereof.

         Section 26. Notices. Notices or demands authorized by this Agreement to
be given or made by the Rights  Agent or by the holder of any Right  Certificate
to or on the Company shall be sufficiently  given or made if sent by first-class
mail, postage prepaid, addressed (until another address is filed in writing with
the Rights Agent) as follows:

                           ARTERIAL VASCULAR ENGINEERING, INC.
                           5355 Skylane Boulevard
                           Santa Rosa, CA 95403
                           Attention:  General Counsel



                                       31.

<PAGE>

Subject to the provisions of Section 21 hereof,  any notice or demand authorized
by this  Agreement  to be given or made by the  Company  or by the holder of any
Right Certificate to or on the Rights Agent shall be sufficiently  given or made
if sent by first-class mail,  postage prepaid,  addressed (until another address
is filed in writing with the Company) as follows:

                           BANK OF BOSTON
                           c/o Boston Equiserve, L.P.
                           P.O. Box 8040
                           Boston, MA 02266-8040

Notices  or  demands  authorized  by this  Agreement  to be given or made by the
Company or the  Rights  Agent to the  holder of any Right  Certificate  shall be
sufficiently  given  or  made  if sent by  first-class  mail,  postage  prepaid,
addressed  to such holder at the address of such holder as shown on the registry
books of the Company.

         Section 27.  Supplements and  Amendments.  The Company may from time to
time  supplement or amend this Agreement  without the approval of any holders of
Right Certificates in order to cure any ambiguity,  to correct or supplement any
provision contained herein which may be defective or inconsistent with any other
provisions  herein,  or to make any other  provisions with respect to the Rights
which the  Company may deem  necessary  or  desirable,  any such  supplement  or
amendment  to be  evidenced  by a writing  signed by the  Company and the Rights
Agent; provided, however, that from and after such time as any Person becomes an
Acquiring Person,  this Agreement shall not be amended in any manner which would
adversely  affect the  interests  of the holders of Rights.  Upon  delivery of a
certificate  from an  appropriate  officer of the Company  which states that the
proposed supplement or amendment is in compliance with the terms of this Section
27, the Rights Agent shall  execute  such  supplement  or  amendment  unless the
Rights  Agent  shall  have  determined  in good faith  that such  supplement  or
amendment would adversely affect its interest under this Agreement. Prior to the
Distribution  Date,  the  interests  of the  holders  of Rights  shall be deemed
coincident with the interests of the holders of Common Shares.

         Section 28.  Determination and Actions by the Board of Directors,  etc.
For all  purposes of this  Agreement,  any  calculation  of the number of Common
Shares outstanding at any particular time, including for purposes of determining
the  particular  percentage  of such  outstanding  Common  Shares  or any  other
securities  of  which  any  Person  is the  Beneficial  Owner,  shall be made in
accordance  with the last sentence of Rule  13d-3(d)(1)(i)  of the General Rules
and  Regulations  under  the  Exchange  Act as in  effect  on the  date  of this
Agreement.  The Board of Directors of the Company shall have the exclusive power
and authority to administer this Agreement and to exercise all rights and powers
specifically  granted to the Board,  or the  Company,  or as may be necessary or
advisable in the administration of this Agreement, including without limitation,
the right and power to (i) interpret the provisions of this Agreement,  and (ii)
make all determinations deemed necessary or advisable for the


                                       32.

<PAGE>

administration  of this Agreement  (including a  determination  to redeem or not
redeem the Rights or to amend the  Agreement).  All such actions,  calculations,
interpretations and determinations (including, for purposes of clause (y) below,
all omissions with respect to the foregoing) which are done or made by the Board
in good faith,  shall (x) be final,  conclusive  and binding on the Rights Agent
and the holders of the Right Certificates,  and (y) not subject the Board to any
liability to the holders of the Right Certificates.

         Section  29.  Successors.  All the  covenants  and  provisions  of this
Agreement  by or for the benefit of the  Company or the Rights  Agent shall bind
and inure to the benefit of their respective successors and assigns hereunder.

         Section 30. Benefits of this Agreement. Nothing in this Agreement shall
be construed to give to any person or  corporation  other than the Company,  the
Rights Agent and the registered holders of the Right Certificates (and, prior to
the Distribution  Date, the Common Shares) any legal or equitable right,  remedy
or claim  under this  Agreement;  but this  Agreement  shall be for the sole and
exclusive benefit of the Company, the Rights Agent and the registered holders of
the Right Certificates (and, prior to the Distribution Date, the Common Shares).

         Section  31.  Severability.   If  any  term,  provision,   covenant  or
restriction  of this Agreement is held by a court of competent  jurisdiction  or
other  authority  to be invalid,  void or  unenforceable,  the  remainder of the
terms, provisions,  covenants and restrictions of this Agreement shall remain in
full force and effect and shall in no way be affected, impaired or invalidated.

         Section 32.  Governing Law. This  Agreement and each Right  Certificate
issued  hereunder  shall be deemed to be a  contract  made under the laws of the
State of Delaware  and for all  purposes  shall be governed by and  construed in
accordance  with the laws of such State  applicable  to contracts to be made and
performed entirely within such State.

         Section 33. Counterparts.  This Agreement may be executed in any number
of counterparts and each of such  counterparts  shall for all purposes be deemed
to be an original,  and all such counterparts shall together  constitute but one
and the same instrument.

         Section 34. Descriptive  Headings.  Descriptive headings of the several
Sections of this  Agreement  are  inserted  for  convenience  only and shall not
control or affect the meaning or construction of any of the provisions hereof.



                                       33.

<PAGE>

         IN WITNESS  WHEREOF,  parties  whereto have caused this Agreement to be
duly executed and their seals  attested,  all as of the day and year first above
written.

ATTEST:                                      ARTERIAL VASCULAR ENGINEERING, INC.

/s/  Lawrence Fassler                        /s/  Bradly A. Jendersee
- --------------------------------------       -----------------------------------
Lawrence Fassler                             Bradly A. Jendersee
General Counsel,                             President and Chief Executive 
Secretary                                    Officer

ATTEST:                                      THE FIRST NATIONAL BANK OF BOSTON


/s/ Terrance Dugan                           /s/ Katherine S. Anderson
- --------------------------------------       -----------------------------------
    Terrance Dugan                               Katherine S. Anderson
    Account Manager                              Director, Client Services

                                       34.


                                    EXHIBIT A


       Filed as Exhibit 2 under Item 7 of the Company's Report on Form 8-K
                            dated February 27, 1997.

<PAGE>

                                    EXHIBIT B


                            FORM OF RIGHT CERTIFICATE


CERTIFICATE NO. R-                                                 _____ RIGHTS


         NOT  EXERCISABLE  AFTER  MARCH  21,  2007 OR  EARLIER  IF
         REDEMPTION OR EXCHANGE OCCURS.  THE RIGHTS ARE SUBJECT TO
         REDEMPTION AT $.01 PER RIGHT AND TO EXCHANGE ON THE TERMS
         SET FORTH IN THE RIGHTS AGREEMENT.


                                RIGHT CERTIFICATE

                       ARTERIAL VASCULAR ENGINEERING, INC.


         This certifies that  ___________________  or registered assigns, is the
registered owner of the number of Rights set forth above, each of which entitles
the owner thereof, subject to the terms, provisions and conditions of the Rights
Agreement,  dated as of February  26,  1997 (the  "Rights  Agreement"),  between
ARTERIAL VASCULAR ENGINEERING, INC., a Delaware corporation (the "Company"), and
THE FIRST  NATIONAL  BANK OF BOSTON (the "Rights  Agent"),  to purchase from the
Company at any time after the Distribution  Date (as such term is defined in the
Rights  Agreement) and prior to 5:00 P.M.,  Eastern  Standard Time, on March 21,
2007 at the office of the Rights Agent  designated  for such purpose,  or at the
office of its  successor  as Rights  Agent,  one  one-hundredth  of a fully paid
non-assessable share of Series A Junior Participating Preferred Stock, par value
$.001 per share (the "Preferred Shares"), of the Company, at a purchase price of
$75.00 per one one-hundredth of a Preferred Share (the "Purchase  Price"),  upon
presentation  and surrender of this Right  Certificate with the Form of Election
to  Purchase  duly  executed.  The  number of  Rights  evidenced  by this  Right
Certificate (and the number of one one-hundredths of a Preferred Share which may
be purchased upon exercise  hereof) set forth above,  and the Purchase Price set
forth above,  are the number and Purchase  Price as of  [________]  based on the
Preferred Shares as constituted at such date.

         From and after the time any Person  becomes an  Acquiring  Person,  (as
such terms are defined in the Rights Agreement), if the Rights evidenced by this
Right  Certificate  are  beneficially  owned by (i) an  Acquiring  Person  or an
Affiliate or Associate of any such  Acquiring  Person (as such terms are defined
in the  Rights  Agreement),  (ii) a  transferee  of any such  Acquiring  Person,
Associate  or  Affiliate  who becomes a transferee  after the  Acquiring  Person
becomes  such,  or (iii) under  certain  circumstances  specified  in the Rights
Agreement, a transferee of any such Acquiring Person, Associate or Affiliate who
becomes a transferee prior to or concurrently with the Acquiring Person becoming
such, such Rights shall become null and


                                       B-1

<PAGE>

void without any further  action and no holder  hereof shall have any right with
respect to such Rights from and after the time any Person  becomes an  Acquiring
Person.

         As provided in the Rights Agreement,  the Purchase Price and the number
of one  one-hundredths  of a  Preferred  Share which may be  purchased  upon the
exercise  of the Rights  evidenced  by this  Right  Certificate  are  subject to
modification and adjustment upon the happening of certain events.

         This Right  Certificate is subject to all of the terms,  provisions and
conditions of the Rights  Agreement,  as amended from time to time, which terms,
provisions and conditions are hereby incorporated herein by reference and made a
part hereof and to which  Rights  Agreement  reference is hereby made for a full
description  of the  rights,  limitations  of  rights,  obligations,  duties and
immunities  hereunder  of the Rights  Agent,  the Company and the holders of the
Right Certificates.  Copies of the Rights Agreement are on file at the principal
executive offices of the Company and the  above-mentioned  offices of the Rights
Agent.

         This Right Certificate, with or without other Right Certificates,  upon
surrender at the office of the Rights Agent designated for such purpose,  may be
exchanged for another Right Certificate or Right  Certificates of like tenor and
date evidencing  Rights entitling the holder to purchase a like aggregate number
of Preferred  Shares as the Rights  evidenced by the Right  Certificate or Right
Certificates  surrendered  shall have entitled such holder to purchase.  If this
Right  Certificate  shall be exercised in part,  the holder shall be entitled to
receive upon surrender  hereof another Right  Certificate or Right  Certificates
for the number of whole Rights not exercised.

         Subject to the provisions of the Rights Agreement, the Rights evidenced
by this  Certificate (i) may be redeemed by the Company at a redemption price of
$.001 per Right or (ii) may be  exchanged  in whole or in part for shares of the
Company's Common Stock or Preferred Shares, par value $.001 per share.

         No fractional  Preferred Shares will be issued upon the exercise of any
Right or Rights  evidenced  hereby  (other  than  fractions  which are  integral
multiples of one one-hundredth of a Preferred Share,  which may, at the election
of the Company, be evidenced by depositary  receipts) but in lieu thereof a cash
payment will be made, as provided in the Rights Agreement.

         No  holder  of this  Right  Certificate  shall be  entitled  to vote or
receive  dividends  or be deemed for any  purpose  the  holder of the  Preferred
Shares  or of any  other  securities  of the  Company  which  may at any time be
issuable on the  exercise  hereof,  nor shall  anything  contained in the Rights
Agreement or herein be construed to confer upon the holder hereof,  as such, any
of the  rights  of a  stockholder  of the  Company  or any right to vote for the
election  of  directors  or upon any matter  submitted  to  stockholders  at any
meeting thereof,  or to give or withhold consent to any corporate  action, or to
receive notice of meetings or other actions  affecting  stockholders  (except as
provided  in the Rights  Agreement),  or to receive  dividends  or  subscription
rights,  or  otherwise,  until  the  Right or  Rights  evidenced  by this  Right
Certificate shall have been exercised as provided in the Rights Agreement.


                                       B-2

<PAGE>

         This Right Certificate shall not be valid or obligatory for any purpose
until it shall have been countersigned by the Rights Agent.

         WITNESS the facsimile  signature of the proper  officers of the Company
and its corporate seal. Dated as of __________.


ATTEST:                                      ARTERIAL VASCULAR ENGINEERING, INC.



- -------------------------------------        -----------------------------------
Lawrence Fassler                             Bradly A. Jendersee
Vice President, General Counsel,             President and Chief Executive
Secretary                                    Officer



COUNTERSIGNED:


THE FIRST NATIONAL BANK OF BOSTON
as Rights Agent



By:
   ----------------------------------
         Authorized Signature


                                       B-3

<PAGE>

                    Form of Reverse Side of Right Certificate


                               FORM OF ASSIGNMENT


                (To be executed by the registered holder if such
               holder desires to transfer the Right Certificate.)


         FOR VALUE RECEIVED ______________________________________ hereby sells,
assigns and transfers unto

_______________________________________________________________
              (Please print name and address of transferee)

______________________________________________________________     this    Right
Certificate,  together  with all right,  title and  interest  therein,  and does
hereby irrevocably constitute and appoint ________________________  Attorney, to
transfer the within Right Certificate on the books of the within-named  Company,
with full power of substitution.


Dated:  ____________________



                                            ____________________________________
                                            Signature




                                       B-4

<PAGE>

             Form of Reverse Side of Right Certificate -- continued

Signature Guaranteed:

         Signatures must be guaranteed by an "eligible guarantor institution" as
defined in Rule 17Ad-15  promulgated under the Securities  Exchange Act of 1934,
as amended.

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

         The undersigned  hereby certifies that (1) the Rights evidenced by this
Right Certificate are not being sold, assigned or transferred by or on behalf of
a Person who is or was an Acquiring  Person,  an  Interested  Stockholder  or an
Affiliate or  Associate  thereof (as defined in the Rights  Agreement);  and (2)
after due  inquiry  and to the best of the  knowledge  of the  undersigned,  the
undersigned did not acquire the Rights evidenced by this Right  Certificate from
any Person who is or was an Acquiring Person, an Interested  Stockholder,  or an
Affiliate  or  Associate  thereof  (as such  terms  are  defined  in the  Rights
Agreement).


                                            ____________________________________
                                            Signature


                                       B-5

<PAGE>

             Form of Reverse Side of Right Certificate -- continued

                          FORM OF ELECTION TO PURCHASE

                  (To be executed if holder desires to exercise
                  Rights represented by the Right Certificate.)


TO ARTERIAL VASCULAR ENGINEERING, INC.

         The    undersigned    hereby    irrevocably    elects    to    exercise
___________________________  Rights  represented  by this Right  Certificate  to
purchase  the  Preferred  Shares  issuable  upon the exercise of such Rights and
requests that certificates for such Preferred Shares be issued in the name of:

Please insert social security
or other identifying number: ______________

_______________________________________________________________
                         (Please print name and address)

_______________________________________________________________

If such  number of Rights  shall not be all the Rights  evidenced  by this Right
Certificate,  a new Right  Certificate for the balance  remaining of such Rights
shall be registered in the name of and delivered to:

Please insert social security
or other identifying number: ______________


_______________________________________________________________
                         (Please print name and address)

_______________________________________________________________

Dated:  _________________


                                            ____________________________________
                                            Signature



                                       B-6

<PAGE>

             Form of Reverse Side of Right Certificate -- continued

Signature Guaranteed:

         Signatures must be guaranteed by an "eligible guarantor institution" as
defined in Rule 17Ad-15  promulgated under the Securities  Exchange Act of 1934,
as amended.


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

         The  undersigned  hereby  certifies  that the Rights  evidenced by this
Right  Certificate  are not  being  beneficially  owned  by nor are  they  being
exercised on behalf of (1) an Acquiring Person, an Interested  Stockholder or an
Affiliate or  Associate  thereof (as defined in the Rights  Agreement);  and (2)
after due  inquiry  and to the best of the  knowledge  of the  undersigned,  the
undersigned did not acquire the Rights evidenced by this Right  Certificate from
any Person who is or was an Acquiring Person, an Interested  Stockholder,  or an
Affiliate  or  Associate  thereof  (as such  terms  are  defined  in the  Rights
Agreement).



                                            ____________________________________
                                            Signature

_____________________________________________________


                                     NOTICE

         The  signature  in the  Form  of  Assignment  or Form  of  Election  to
Purchase,  as the case may be, must conform to the name as written upon the face
of this Right Certificate in every particular, without alteration or enlargement
or any change whatsoever.

         In  the  event  the  certification  set  forth  above  in the  Form  of
Assignment  or the Form of  Election  to  Purchase,  as the case may be,  is not
completed,  the Company and the Rights Agent will deem the  beneficial  owner of
the Rights  evidenced by this Right  Certificate to be an Acquiring Person or an
Affiliate or  Associate  thereof (as defined in the Rights  Agreement)  and such
Assignment or Election to Purchase will not be honored.


                                       B-7

<PAGE>

                                    EXHIBIT C

                       ARTERIAL VASCULAR ENGINEERING, INC.

                          SUMMARY OF RIGHTS TO PURCHASE
                                PREFERRED SHARES


         On February  25,  1997,  the Board of  Directors  of ARTERIAL  VASCULAR
ENGINEERING,  INC. (the  "Company")  declared a dividend of one preferred  share
purchase right (a "Right") for each outstanding share of common stock, par value
$.001 per share (the "Common Shares"), of the Company. The dividend is effective
as of March 21, 1997 (the  "Record  Date") with respect to the  stockholders  of
record on that date.  The Rights  will also attach to new Common  Shares  issued
after the Record Date.  Each Right  entitles the  registered  holder to purchase
from the Company one  one-hundredth of a share of Series A Junior  Participating
Preferred  Stock,  par value $.001 per share (the  "Preferred  Shares"),  of the
Company at a price of $75.00 per one  one-hundredth  of a  Preferred  Share (the
"Purchase Price"), subject to adjustment. Each Preferred Share is designed to be
the economic  equivalent of 100 Common Shares.  The description and terms of the
Rights are set forth in a Rights  Agreement  dated as of February  26, 1997 (the
"Rights  Agreement"),  between the Company and The First National Bank of Boston
(the "Rights Agent").

DETACHMENT AND TRANSFER OF RIGHTS

         Initially,  the  Rights  will be  evidenced  by the stock  certificates
representing Common Shares then outstanding,  and no separate Right Certificates
will be  distributed.  Until the  earlier to occur of (i) a public  announcement
that a person  or group of  affiliated  or  associated  persons,  has  become an
"Acquiring  Person"  (as such term is further  defined in the Rights  Agreement,
means that such person or group has acquired beneficial ownership of 15% or more
of the  outstanding  Common  Shares)  or (ii) 10  business  days  following  the
commencement  of, or  announcement  of an  intention  to make, a tender offer or
exchange  offer which would result in the  beneficial  ownership by an Acquiring
Person of 15% or more of the  outstanding  Common  Shares  (the  earlier of such
dates being called the "Distribution Date"), the Rights will be evidenced,  with
respect to any of the Common  Share  certificates  outstanding  as of the Record
Date,  by such Common  Share  certificate  with a copy of this Summary of Rights
attached thereto.

         The Rights Agreement  provides that,  until the  Distribution  Date (or
earlier redemption or expiration of the Rights),  the Rights will be transferred
with and only with the Common Shares.  Until the  Distribution  Date (or earlier
redemption or expiration of the Rights),  new Common Share  certificates  issued
after the Record  Date upon  transfer  or new  issuance  of Common  Shares  will
contain a notation  incorporating  the Rights Agreement by reference.  Until the
Distribution  Date (or  earlier  redemption  or  expiration  of the  Rights) the
surrender or transfer of any  certificates  for Common Shares  outstanding as of
the Record Date,  even without such notation or a copy of this Summary of Rights
being  attached  thereto,  will  also  constitute  the  transfer  of the  Rights
associated with the Common Shares,  represented by such certificate.  As soon as
practicable  following the Distribution Date, separate  certificates  evidencing
the Rights


                                       C-1

<PAGE>

("Right  Certificates") will be mailed to holders of record of the Common Shares
as of the close of business on the  Distribution  Date and such  separate  Right
Certificates alone will evidence the Rights.

EXERCISABILITY OF RIGHTS

         The Rights are not exercisable until the Distribution  Date. The Rights
will expire on March 21, 2007 (the "Final  Expiration  Date"),  unless the Final
Expiration  Date is  extended  or unless  the  Rights are  earlier  redeemed  or
exchanged by the  Company,  in each case as  described  below.  Until a Right is
exercised,  the holder thereof, as such, will have no rights as a stockholder of
the  Company,  including,  without  limitation,  the right to vote or to receive
dividends.

         The Purchase Price payable, and the number of Preferred Shares or other
securities  or  property  issuable,  upon  exercise of the Rights are subject to
adjustment  from time to time to prevent  dilution.  The  number of  outstanding
Rights and the number of one  one-hundredths  of a Preferred Share issuable upon
exercise of each Right are also  subject to  adjustment  in the event of a stock
split of the Common Shares or a stock  dividend on the Common Shares  payable in
Common Shares,  or  subdivisions,  consolidations  or combinations of the Common
Shares occurring, in any such case, prior to the Distribution Date. With certain
exceptions,  no  adjustment  in  the  Purchase  Price  will  be  required  until
cumulative  adjustments  require an  adjustment  of at least 1% in such Purchase
Price. No fractional Preferred Shares will be issued (other than fractions which
are integral  multiples of one one-hundredth of a Preferred Share, which may, at
the election of the Company,  be evidenced by  depositary  receipts) and in lieu
thereof,  an  adjustment  in cash will be made based on the market  price of the
Preferred Shares on the last trading day prior to the date of exercise.

TERMS OF PREFERRED SHARES

         Preferred  Shares  purchasable  upon exercise of the Rights will not be
redeemable.  Each  Preferred  Share will be entitled  to a minimum  preferential
quarterly  dividend payment of $l per share but will be entitled to an aggregate
dividend of 100 times the dividend  declared per Common  Share.  In the event of
liquidation,  the holders of the Preferred  Shares will be entitled to a minimum
preferential  liquidation  payment of $100 per share but will be  entitled to an
aggregate payment of 100 times the payment made per Common Share. Each Preferred
Share will have 100 votes,  voting together with the Common Shares.  Finally, in
the event of any merger,  consolidation  or other  transaction  in which  Common
Shares are exchanged, each Preferred Share will be entitled to receive 100 times
the amount  received per Common  Share.  These rights are protected by customary
anti-dilution  provisions.  Because  of  the  nature  of the  Preferred  Shares'
dividend,  liquidation  and voting  rights,  the value of the one  one-hundredth
interest in a Preferred  Share  purchasable  upon  exercise of each Right should
approximate  the value of one Common  Share.  The  Preferred  Shares  would rank
junior to any other series of the Company's preferred stock.



                                       C-2

<PAGE>

TRIGGER OF FLIP-IN AND FLIP-OVER RIGHTS

         In the event  that any  person  or group of  affiliated  or  associated
persons becomes an Acquiring Person, proper provision shall be made so that each
holder of a Right, other than Rights  beneficially owned by the Acquiring Person
(which will thereafter be void),  will thereafter have the right to receive upon
exercise  that number of Common  Shares  having a market  value of two times the
exercise price of the Right.

         In the event that the Company is acquired in a merger or other business
combination  transaction  or 50% or more of its  consolidated  assets or earning
power are sold,  proper  provision  will be made so that each  holder of a Right
will thereafter have the right to receive, upon the exercise thereof at the then
current  exercise  price of the Right,  that number of shares of common stock of
the acquiring  company which at the time of such  transaction will have a market
value of two times the exercise price of the Right.

REDEMPTION AND EXCHANGE OF RIGHTS

         At any time prior to the  earliest  of (i) the close of business on the
day of the first  public  announcement  that a person  has  become an  Acquiring
Person, or (ii) the Final Expiration Date, the Board of Directors of the Company
may redeem the Rights in whole,  but not in part,  at a price of $.001 per Right
(the "Redemption  Price"). The redemption of the Rights may be made effective at
such time on such basis with such  conditions  as the Board of  Directors in its
sole discretion may establish;  provided,  however, that in the event of certain
changes in the membership of the Board of Directors,  no redemption  shall occur
for a period of 180 days from such change in  membership.  Immediately  upon any
redemption  of the Rights,  the right to exercise the Rights will  terminate and
the only right of the holders of Rights will be to receive the Redemption Price.
Additionally,  after the time that a person  becomes an  Acquiring  Person,  the
Company may redeem the then outstanding Rights in whole, but not in part, at the
Redemption  Price provided,  that such redemption is in connection with a merger
or other business combination,  transaction or series of transactions  involving
the  Company in which all  holders  of Common  Share are  treated  alike and not
involving an Acquiring Person or certain affiliated persons.

         At any time after any Person  becomes an Acquiring  Person and prior to
the acquisition by such person or group of 50% or more of the outstanding Common
Shares,  the Board of Directors  of the Company may  exchange the Rights  (other
than Rights owned by such person or group which will have become void), in whole
or in part, at an exchange ratio of one Common Share, or one  one-hundredth of a
Preferred  Share (or of a share of a class or series of the Company's  preferred
stock having equivalent designations and the powers, preferences and rights, and
the  qualifications,  limitations  and  restrictions),  per  Right  (subject  to
adjustment).

AMENDMENT OF RIGHTS

         The terms of the Rights may be amended by the Board of Directors of the
Company  without the consent of the holders of the Rights,  except that from and
after such time as any


                                       C-3

<PAGE>


person or group of affiliated or associated  persons becomes an Acquiring Person
no such  amendment  may  adversely  affect the  interests  of the holders of the
Rights.

ADDITIONAL INFORMATION

         A copy of the Rights  Agreement has been filed with the  Securities and
Exchange Commission as an Exhibit to a Current Report on Form 8-K dated February
27,  1997.  A copy of the Rights  Agreement  is  available  from the  Company by
writing to: Investor Relations, ARTERIAL VASCULAR ENGINEERING, INC., 3576 UNOCAL
PLACE,  SANTA ROSA,  CA 95403.  THIS  SUMMARY  DESCRIPTION  OF THE RIGHTS IS NOT
INTENDED TO BE COMPLETE  AND IS  QUALIFIED  IN ITS  ENTIRETY BY REFERENCE TO THE
RIGHTS AGREEMENT, WHICH IS HEREBY INCORPORATED HEREIN BY REFERENCE.



                                       C-4






                                     
                           CERTIFICATE OF DESIGNATION

                                       OF

                  SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

                                       OF

                       ARTERIAL VASCULAR ENGINEERING, INC.

                         (Pursuant to Section 151 of the
                        Delaware General Corporation Law)


         ARTERIAL  VASCULAR  ENGINEERING,  INC.,  a  corporation  organized  and
existing under the General Corporation Law of the State of Delaware (hereinafter
called the  "Company"),  hereby  certifies  that the  following  resolution  was
adopted by the Board of Directors of the  Corporation as required by Section 151
of the General Corporation Law at a meeting duly called and held on February 25,
1997:

                  RESOLVED, that pursuant to the authority granted to and vested
         in the  Board  of  Directors  of the  Company  in  accordance  with the
         provisions of its Certificate of Incorporation,  the Board of Directors
         hereby creates a series of Preferred  Stock, par value $.001 per share,
         of the Company and hereby states the  designation and number of shares,
         and fixes the relative  designations  and the powers,  preferences  and
         rights, and the  qualifications,  limitations and restrictions  thereof
         (in  addition  to  the  provisions  set  forth  in the  Certificate  of
         Incorporation  of the Company,  which are  applicable  to the Preferred
         Stock of all classes and series), as follows:

                  Series A Junior Participating Preferred Stock:

                  Section 1.  Designation  and Amount.  One Million  (1,000,000)
         shares of Preferred Stock,  $.001 par value,  are designated  "Series A
         Junior  Participating  Preferred  Stock" with the  designations and the
         powers, preferences and rights, and the qualifications, limitations and
         restrictions  specified  herein (the "Junior  Preferred  Stock").  Such
         number of shares may be increased or decreased by


                                       A-1

<PAGE>

         resolution of the Board of Directors;  provided, that no decrease shall
         reduce the number of shares of Junior  Preferred Stock to a number less
         than the number of shares  then  outstanding  plus the number of shares
         reserved for issuance upon the exercise of outstanding options,  rights
         or warrants or upon the conversion of any outstanding securities issued
         by the Company convertible into Junior Preferred Stock.

                  Section 2.  Dividends and Distributions.

                  (A)  Subject to the rights of the holders of any shares of any
         series of  Preferred  Stock (or any similar  stock)  ranking  prior and
         superior to the Junior  Preferred Stock with respect to dividends,  the
         holders  of shares of Junior  Preferred  Stock,  in  preference  to the
         holders  of Common  Stock,  par value  $.001  per  share  (the  "Common
         Stock"),  of the  Company,  and of any  other  junior  stock,  shall be
         entitled to receive, when, as and if declared by the Board of Directors
         out of funds  legally  available for the purpose,  quarterly  dividends
         payable in cash on the first day of April, July, October and January in
         each year  (each  such date being  referred  to herein as a  "Quarterly
         Dividend  Payment Date"),  commencing on the first  Quarterly  Dividend
         Payment Date after the first issuance of a share or fraction of a share
         of Junior  Preferred  Stock,  in an amount  per share  (rounded  to the
         nearest  cent)  equal to the greater of (a) $l.00 or (b) subject to the
         provision for adjustment hereinafter set forth, 100 times the aggregate
         per share amount of all cash dividends, and 100 times the aggregate per
         share  amount  (payable  in kind) of all  non-cash  dividends  or other
         distributions,  other than a dividend payable in shares of Common Stock
         or a  subdivision  of  the  outstanding  shares  of  Common  Stock  (by
         reclassification  or otherwise)  declared on the Common Stock since the
         immediately  preceding Quarterly Dividend Payment Date or, with respect
         to the first Quarterly  Dividend Payment Date, since the first issuance
         of any share or fraction of a share of Junior  Preferred  Stock. In the
         event the Company  shall at any time declare or pay any dividend on the
         Common Stock payable in shares of Common Stock, or effect a subdivision
         or combination or  consolidation  of the  outstanding  shares of Common
         Stock (by  reclassification  or otherwise than by payment of a dividend
         in shares of Common Stock) into a greater or lesser number of shares of
         Common  Stock,  then in each such case the  amount to which  holders of
         shares of Junior  Preferred  Stock were entitled  immediately  prior to
         such event under clause (b) of the preceding sentence shall be adjusted
         by multiplying such amount by a fraction, the numerator of which is the
         number of shares of Common  Stock  outstanding  immediately  after such
         event and the  denominator  of which is the  number of shares of Common
         Stock that were outstanding immediately prior to such event.

                  (B) The Company  shall declare a dividend or  distribution  on
         the Junior Preferred Stock as provided in paragraph (A) of this Section
         immediately  after it declares a dividend or distribution on the Common
         Stock  (other  than a  dividend  payable  in shares  of Common  Stock);
         provided that, in the event no dividend or distribution shall have been
         declared on the Common Stock during the period


                                       A-2

<PAGE>

         between any  Quarterly  Dividend  Payment Date and the next  subsequent
         Quarterly  Dividend  Payment Date, a dividend of $1.00 per share on the
         Junior Preferred Stock shall nevertheless be payable on such subsequent
         Quarterly Dividend Payment Date.

                  (C)  Dividends  shall  begin to accrue  and be  cumulative  on
         outstanding  shares  of  Junior  Preferred  Stock  from  the  Quarterly
         Dividend  Payment Date next preceding the date of issue of such shares,
         unless the date of issue of such shares is prior to the record date for
         the first Quarterly  Dividend  Payment Date, in which case dividends on
         such  shares  shall  begin  to  accrue  from  the date of issue of such
         shares,  or unless the date of issue is a  Quarterly  Dividend  Payment
         Date or is a date  after  the  record  date  for the  determination  of
         holders  of shares of Junior  Preferred  Stock  entitled  to  receive a
         quarterly  dividend and before such Quarterly Dividend Payment Date, in
         either of which  events  such  dividends  shall  begin to accrue and be
         cumulative  from such  Quarterly  Dividend  Payment  Date.  Accrued but
         unpaid dividends shall not bear interest.  Dividends paid on the shares
         of Junior  Preferred  Stock in an amount less than the total  amount of
         such  dividends at the time accrued and payable on such shares shall be
         allocated pro rata on a  share-by-share  basis among all such shares at
         the time outstanding.  The Board of Directors may fix a record date for
         the  determination  of  holders  of shares of  Junior  Preferred  Stock
         entitled  to receive  payment of a dividend  or  distribution  declared
         thereon,  which record date shall be not more than 60 days prior to the
         date fixed for the payment thereof.

                  Section  3.  Voting  Rights.  The  holders of shares of Junior
         Preferred Stock shall have the following voting rights:

                  (A) Subject to the provision for  adjustment  hereinafter  set
         forth,  each share of Junior  Preferred  Stock shall entitle the holder
         thereof  to  100  votes  on all  matters  submitted  to a  vote  of the
         stockholders of the Company. In the event the Company shall at any time
         declare or pay any  dividend on the Common  Stock  payable in shares of
         Common Stock,  or effect a subdivision or combination or  consolidation
         of the  outstanding  shares of Common  Stock  (by  reclassification  or
         otherwise than by payment of a dividend in shares of Common Stock) into
         a greater or lesser number of shares of Common Stock, then in each such
         case the number of votes per share to which holders of shares of Junior
         Preferred Stock were entitled  immediately prior to such event shall be
         adjusted by  multiplying  such number by a fraction,  the  numerator of
         which is the number of shares of Common Stock  outstanding  immediately
         after such event and the  denominator  of which is the number of shares
         of Common Stock that were outstanding immediately prior to such event.

                  (B)  Except  as  otherwise   provided  herein,  in  any  other
         Certificate of Designation  creating a series of Preferred Stock or any
         similar  stock,  or by law,  the holders of shares of Junior  Preferred
         Stock and the holders of shares of Common  Stock and any other  capital
         stock of the Company having general voting

                                       A-3

<PAGE>

         rights shall vote  together as one class on all matters  submitted to a
         vote of stockholders of the Company.

                  (C) Except as set forth  herein,  or as otherwise  provided by
         law,  holders of Junior  Preferred  Stock shall have no special  voting
         rights and their  consent  shall not be required  (except to the extent
         they are  entitled  to vote with  holders of Common  Stock as set forth
         herein) for taking any corporate action.

                  Section 4.  Certain Restrictions.

                  (A)  Whenever  quarterly   dividends  or  other  dividends  or
         distributions  payable on the Junior  Preferred  Stock as  provided  in
         Section 2 are in arrears,  thereafter  and until all accrued and unpaid
         dividends  and  distributions,  whether or not  declared,  on shares of
         Junior  Preferred Stock  outstanding  shall have been paid in full, the
         Company shall not:

                           (i)  declare  or pay  dividends,  or make  any  other
         distributions,  on any  shares of stock  ranking  junior  (either as to
         dividends or upon liquidation, dissolution or winding up) to the Junior
         Preferred Stock;

                           (ii)  declare  or pay  dividends,  or make any  other
         distributions, on any shares of stock ranking on a parity (either as to
         dividends  or upon  liquidation,  dissolution  or winding  up) with the
         Junior  Preferred  Stock,  except  dividends paid ratably on the Junior
         Preferred  Stock  and all such  parity  stock on  which  dividends  are
         payable or in arrears in  proportion  to the total amounts to which the
         holders of all such shares are then entitled;

                           (iii)  redeem or  purchase or  otherwise  acquire for
         consideration  shares  of  any  stock  ranking  junior  (either  as  to
         dividends or upon liquidation, dissolution or winding up) to the Junior
         Preferred  Stock,  provided  that the Company  may at any time  redeem,
         purchase  or  otherwise  acquire  shares  of any such  junior  stock in
         exchange for shares of any stock of the Company  ranking junior (either
         as to dividends or upon dissolution,  liquidation or winding up) to the
         Junior Preferred Stock; or

                           (iv)  redeem or  purchase  or  otherwise  acquire for
         consideration  any shares of Junior  Preferred  Stock, or any shares of
         stock ranking on a parity with the Junior  Preferred  Stock,  except in
         accordance  with a purchase offer made in writing or by publication (as
         determined  by the Board of  Directors)  to all  holders of such shares
         upon such terms as the Board of Directors,  after  consideration of the
         respective   annual  dividend  rates  and  other  relative  rights  and
         preferences of the respective  series and classes,  shall  determine in
         good  faith  will  result  in fair and  equitable  treatment  among the
         respective series or classes.

                  (B) The Company shall not permit any subsidiary of the Company
         to purchase or otherwise  acquire for consideration any shares of stock
         of the


                                       A-4

<PAGE>

         Company unless the Company could,  under  paragraph (A) of this Section
         4,  purchase or otherwise  acquire such shares at such time and in such
         manner.

                  Section 5. Reacquired  Shares.  Any shares of Junior Preferred
         Stock  purchased  or  otherwise  acquired  by the Company in any manner
         whatsoever   shall  be  retired  and  cancelled   promptly   after  the
         acquisition  thereof.  All such  shares  shall upon their  cancellation
         become  authorized  but unissued  shares of Preferred  Stock and may be
         reissued  as part of a new  series of  Preferred  Stock  subject to the
         conditions  and  restrictions  on  issuance  set forth  herein,  in the
         Restated  Certificate of Incorporation,  or in any other Certificate of
         Designation  creating a series of Preferred  Stock or any similar stock
         or as otherwise required by law.

                  Section 6.  Liquidation,  Dissolution  or Winding Up. Upon any
         liquidation,  dissolution or winding up of the Company, no distribution
         shall be made (1) to the  holders  of  shares of stock  ranking  junior
         (either as to dividends or upon liquidation, dissolution or winding up)
         to the Junior  Preferred  Stock unless,  prior thereto,  the holders of
         shares of Junior  Preferred  Stock shall have  received $100 per share,
         plus an amount equal to accrued and unpaid dividends and  distributions
         thereon, whether or not declared, to the date of such payment, provided
         that the holders of shares of Junior  Preferred Stock shall be entitled
         to receive an aggregate amount per share,  subject to the provision for
         adjustment  hereinafter  set  forth,  equal to 100 times the  aggregate
         amount  to be  distributed  per  share to  holders  of shares of Common
         Stock,  or (2) to the  holders  of shares of stock  ranking on a parity
         (either as to dividends or upon liquidation, dissolution or winding up)
         with the Junior Preferred Stock,  except  distributions made ratably on
         the Junior  Preferred  Stock and all such parity stock in proportion to
         the total  amounts to which the holders of all such shares are entitled
         upon such  liquidation,  dissolution  or  winding  up. In the event the
         Company  shall at any time  declare or pay any  dividend  on the Common
         Stock  payable in shares of Common Stock,  or effect a  subdivision  or
         combination or consolidation of the outstanding  shares of Common Stock
         (by  reclassification  or  otherwise  than by payment of a dividend  in
         shares of Common  Stock)  into a greater or lesser  number of shares of
         Common  Stock,  then in each  such case the  aggregate  amount to which
         holders of shares of Junior  Preferred Stock were entitled  immediately
         prior to such event  under the  proviso in clause (1) of the  preceding
         sentence shall be adjusted by multiplying such amount by a fraction the
         numerator of which is the number of shares of Common Stock  outstanding
         immediately after such event and the denominator of which is the number
         of shares of Common Stock that were  outstanding  immediately  prior to
         such event.

                  Section 7.  Consolidation,  Merger,  etc.  In case the Company
         shall  enter  into  any  consolidation,  merger,  combination  or other
         transaction  in which the shares of Common Stock are  exchanged  for or
         changed into other stock or securities, cash and/or any other property,
         then in any such case each share of Junior Preferred Stock shall at the
         same time be  similarly  exchanged or changed into an amount per share,
         subject to the provision for adjustment hereinafter set


                                       A-5

<PAGE>


         forth,  equal to 100 times the aggregate  amount of stock,  securities,
         cash and/or any other property  (payable in kind),  as the case may be,
         into  which or for which  each  share of  Common  Stock is  changed  or
         exchanged.  In the event the Company  shall at any time  declare or pay
         any dividend on the Common Stock payable in shares of Common Stock,  or
         effect a subdivision or combination or consolidation of the outstanding
         shares  of Common  Stock  (by  reclassification  or  otherwise  than by
         payment  of a  dividend  in shares of Common  Stock)  into a greater or
         lesser  number of shares  of Common  Stock,  then in each such case the
         amount set forth in the preceding sentence with respect to the exchange
         or change of shares of Junior  Preferred  Stock  shall be  adjusted  by
         multiplying  such amount by a fraction,  the  numerator of which is the
         number of shares of Common  Stock  outstanding  immediately  after such
         event and the  denominator  of which is the  number of shares of Common
         Stock that were outstanding immediately prior to such event.

                  Section 8. No Redemption. The shares of Junior Preferred Stock
         shall not be redeemable.

                  Section 9. Rank. The Junior  Preferred  Stock shall rank, with
         respect to the payment of  dividends  and the  distribution  of assets,
         junior  to all  series of any other  class of the  Company's  Preferred
         Stock.

                  Section   10.   Amendment.   The   Restated   Certificate   of
         Incorporation  of the Company  shall not be amended in any manner which
         would  materially  alter or change the powers,  preferences  or special
         rights of the Junior  Preferred  Stock so as to affect  them  adversely
         without the affirmative  vote of the holders of at least  two-thirds of
         the outstanding shares of Junior Preferred Stock,  voting together as a
         single class.

         IN WITNESS  WHEREOF,  the undersigned have executed this certificate as
of February 26, 1997.

                                     /s/     BRADLY A. JENDERSEE
                                   ---------------------------------------------
                                   BRADLY A. JENDERSEE
                                   President and Chief Executive Officer


                                     /s/     LAWRENCE FASSLER
                                   ---------------------------------------------
                                   LAWRENCE FASSLER
                                   General Counsel, Secretary



                                       A-6



FOR IMMEDIATE RELEASE



                 ARTERIAL VASCULAR ENGINEERING ADOPTS PREFERRED
                           STOCK PURCHASE RIGHTS PLAN

SANTA  ROSA/February  27, 1997/PR Newswire -- The Board of Directors of Arterial
Vascular Engineering,  Inc. ("AVE") (Nasdaq:  AVEI) today announced the adoption
of a Preferred  Stock  Purchase  Rights  Plan (the  "Rights  Plan")  under which
stockholders  will receive one right to purchase one one-hundredth of a share of
a new series of Preferred Stock for each  outstanding  share of AVE Common Stock
held of record at the close of business on March 21, 1997 (the  "Record  Date").
The Company  retained the services of Goldman Sachs & Co. and Cowen & Company in
connection with the adoption of the Rights Plan.

The Rights Plan is designed to enable all AVE  stockholders  to realize the full
value of their  investment  and to provide for fair and equal  treatment for all
stockholders  in the event that an  unsolicited  attempt is made to acquire AVE.
The adoption of the Rights Plan is intended as a means to guard against  abusive
takeover tactics and is not in response to any proposal to acquire AVE.

The rights will be distributed as a non-taxable  dividend and will expire in ten
years. The rights will become  exercisable only if a person or group acquires 15
percent or more of the  outstanding AVE Common Stock or announces a tender offer
for 15 percent or more of the  outstanding  AVE Common  Stock.  The rights  will
trade with AVE's Common Stock, except that upon the occurrence of certain future
events,  such rights will  separate  and entitle the holders to certain  rights.
AVE's Board of Directors may terminate the Plan at any time or redeem the rights
prior to the time a person  acquires more than 15 percent of the outstanding AVE
Common Stock. Additional details regarding the Rights Plan will be outlined in a
summary to be mailed to all stockholders following the Record Date.

Headquartered in Santa Rosa, California,  Arterial Vascular Engineering, Inc. is
a leading provider of highly specialized  coronary stent and balloon angioplasty
products, including nine proprietary stent systems and three balloon angioplasty
systems.  AVE sells its stent and  balloon  angioplasty  systems in more than 30
countries outside of the United States.

Except  for the  historical  information  contained  herein,  this news  release
contains  forward-looking  statements  that  involve  risks  and  uncertainties,
including the risks  detailed  from time to time in documents  filed by AVE with
the SEC, including the report on Form 10-K for the year ended June 30, 1996.

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