ATMI INC
8-K, EX-4.1, 2000-10-17
INDUSTRIAL INORGANIC CHEMICALS
Previous: ATMI INC, 8-K, 2000-10-17
Next: ATMI INC, 8-K, EX-99.1, 2000-10-17



                                   ATMI, Inc.

                                       and

                               Fleet National Bank


                                RIGHTS AGREEMENT

                          Dated as of October 13, 2000

<PAGE>

                                TABLE OF CONTENTS
                                                                            Page

Section 1.  Certain Definitions..............................................1
Section 2.  Appointment of Rights Agent......................................8
Section 3.  Issuance of Rights Certificates..................................8
Section 4.  Form of Rights Certificates......................................9
Section 5.  Execution, Countersignature and Registration....................10
Section 6.   Transfer, Division, Combination and Exchange of Rights
              Certificates; Mutilated, Destroyed,
               Lost or Stolen Rights  Certificates...........................11
Section 7.   Exercise of Rights; Purchase Price; Expiration Date of Rights...12
Section 8.   Cancellation and Destruction of Rights Certificates.............14
Section 9.   Reservation and Availability of Preferred Stock.................14
Section 10.  Preferred Stock Record Date.....................................15
Section 11.  Adjustments to Purchase Price, Number of Shares or
               Number of Rights..............................................16
Section 12.  Certification of Adjustments....................................23
Section 13.  Consolidation, Merger or Sale or Transfer of Property,
              Assets or Earning Power........................................23
Section 14.  Fractional Rights and Fractional Shares.........................26
Section 15.  Rights of Action................................................27
Section 16.  Agreement of Rights Holders Concerning Transfer and Ownership of
              Rights.........................................................28
Section 17.  Rights Holder Not Deemed a Stockholder..........................28
Section 18.  Concerning the Rights Agent.....................................29
Section 19.  Merger or Consolidation or Change of Name of Rights Agent.......29
Section 20.  Duties of Rights Agent..........................................30
Section 21.  Change of Rights Agent..........................................32
Section 22.  Issuance of New Rights Certificates.............................32
Section 23.  Redemption......................................................33
Section 24.  Notice of Certain Events........................................34
Section 25.  Notices.........................................................35
Section 26.  Amendments and Supplements......................................35
Section 27.  Successors......................................................36
Section 28.  Benefits of this Agreement; Determinations and Actions by the
                Board of Directors...........................................36
Section 29.  Severability....................................................36
Section 30.  Governing Law...................................................37
Section 31.  Counterparts....................................................37
Section 32.  Descriptive Headings............................................37
Section 33.  Grammatical Construction........................................37

<PAGE>

                                RIGHTS AGREEMENT

            Rights  Agreement  dated as of October  13,  2000,  between  ATMI,
Inc., a Delaware  corporation  (the  "Company"),  and Fleet National Bank (the
"Rights Agent").

                                 R E C I T A L S

            The Board of  Directors of the Company has  authorized  and declared
the payment of a dividend of one preferred  share  purchase  right (the "Right")
for each share of Common  Stock (as  defined in  Section 1)  outstanding  on the
Record Date (as  defined in Section 1) and has  authorized  the  issuance of one
Right for each share of Common  Stock  issued  between  the Record  Date and the
Distribution  Date (as such terms are  defined in Section  1),  and,  in certain
cases, following the Distribution Date. Each Right represents,  as of the Record
Date, the right to purchase one  one-hundredth of a share of Preferred Stock (as
defined in Section 1) upon the terms and subject to the  conditions  hereinafter
set forth.

            NOW,  THEREFORE,  in  consideration  of the  premises and the mutual
agreements set forth in this Agreement, the parties hereby agree as follows:

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

            (a) (i) "Acquiring  Person" means any Person who or which,  together
with all Affiliates and Associates of such Person,  is (or has previously  been,
at any time  after the date of this  Agreement,  whether  or not such  Person(s)
continues to be) the Beneficial  Owner of 15% or more of the Outstanding  Common
Stock (as defined in this  Section 1).  However,  "Acquiring  Person"  shall not
include any Exempt Person.

                  (ii) A Person does not become an "Acquiring  Person" solely as
the result of (A) an  acquisition  of Common  Stock by the Company or any of its
Subsidiaries 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  Outstanding  Common Stock,  or (B) such Person  becoming the  Beneficial
Owner of 15% or more of the  Outstanding  Common  Stock solely as a result of an
Exempt Event;  provided,  however, that if a Person becomes the Beneficial Owner
of 15% or more of the Outstanding  Common Stock solely by reason of such a share
acquisition  by the Company or the  occurrence  of such an Exempt Event and such
Person shall,  after becoming the Beneficial Owner of such Common Stock,  become
the Beneficial  Owner of additional  shares of Common Stock  constituting  1% or
more of the then Outstanding Common Stock by any means whatsoever (other than as
a result of the subsequent  occurrence of an Exempt Event, a stock dividend or a
subdivision  of the  Common  Stock  into a larger  number of shares or a similar
transaction),  then such Person shall be deemed to be an "Acquiring  Person"; or
(C) the  inadvertent  acquisition of beneficial  ownership of 15% or more of the
Common Stock of the Company if the Board of Directors  determines  in good faith
that such acquisition was inadvertent and such Person immediately divests itself
of a  sufficient  number of shares of Common  Stock so that such Person could no
longer be an  "Acquiring  Person";  or (D) if such  Person  is an  Institutional
Investor,  such  Institutional  Investor becoming the Beneficial Owner of 15% or
more of the  Outstanding  Common  Stock  solely by reason of such  Institutional

<PAGE>

Investor's  Regular  Trading   Activities;   provided,   however,   that  if  an
Institutional  Investor  becomes the Beneficial Owner of 20% or more of the then
Outstanding Common Stock other than solely as the result of the events described
in clause (B) or (C) of this  Section  1(a)(ii)  (and in the case of clause (C),
such Institutional Investor immediately divests itself of a sufficient number of
shares of Common  Stock as that it is no longer the  Beneficial  Owner of 20% or
more of the then Outstanding  Common Stock),  then such  Institutional  Investor
shall be deemed an "Acquiring Person."

            (b)  "Affiliate"  of a Person has the meaning  given to such term in
Rule 12b-2 of the General  Rules and  Regulations  under the Exchange Act, as in
effect on the date of this Agreement.

            (c)  "Associate"  of a Person has the meaning  given to such term in
Rule 12b-2 of the General  Rules and  Regulations  under the Exchange Act, as in
effect on the date of this Agreement.

            (d)   Except  as  provided  below,  a  Person  is the  "Beneficial
Owner" of, and "beneficially owns," any securities:

                  (i) which  such  Person or any  Affiliate  or  Associate  of
such Person beneficially owns, directly or indirectly;

                  (ii) which such Person or any  Affiliate  or Associate of such
Person has, directly or indirectly, the right or obligation (whether or not then
exercisable or effective) to acquire  pursuant to any agreement,  arrangement or
understanding  (whether or not in writing),  or upon the exercise of  conversion
rights, exchange rights, rights (other than these Rights),  warrants or options,
or otherwise; provided, however, that a Person will 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 Affiliate or Associate
of such Person  until such  tendered  securities  are  accepted  for purchase or
exchange;  and provided  further,  that prior to the  occurrence of a Triggering
Event, a Person will not be deemed the Beneficial  Owner of, or to  beneficially
own, securities obtainable upon exercise of the Rights;

                  (iii) which such Person or any  Affiliate or Associate of such
Person has,  directly or indirectly,  the right (whether or not then exercisable
or effective) to vote,  or to direct the voting of,  pursuant to any  agreement,
arrangement or  understanding  (whether or not in writing);  provided,  however,
that a Person shall not be deemed the  Beneficial  Owner of, or to  beneficially
own, any security pursuant to this clause (iii) if the agreement, arrangement or
understanding  to vote,  or to direct the voting of,  such  security  (A) arises
solely from a revocable  proxy or consent given in response to a public proxy or
consent  solicitation made pursuant to, and in accordance with, the Exchange Act
and  applicable  rules  and  regulations  thereunder  and (B) is not  also  then
reportable  on  Schedule  13D  under  the  Exchange  Act (or any  comparable  or
successor schedule or report);

                  (iv) which such Person or any  Affiliate  or Associate of such
Person has  "beneficial  ownership" of (as determined  pursuant to Rule 13d-3 of
the General Rules and  Regulations  under the Exchange Act or any  comparable or
successor provision); or


                                      -2-
<PAGE>

                  (v) which are beneficially owned,  directly or indirectly,  by
any other  Person or any  Affiliate  or Associate of such other Person with whom
such Person or any  Affiliate  or  Associate  of such Person has any  agreement,
arrangement  or  understanding  (whether or not in  writing)  for the purpose of
acquiring, holding, voting (except pursuant to a revocable proxy as described in
subparagraph  (iii) of this Section 1(d)) or disposing of any  securities of the
Company.

            Nothing in this Section 1(d) causes a Person  engaged in business as
an  underwriter  of  securities  to  be  the   "Beneficial   Owner"  of,  or  to
"beneficially own," any securities acquired through such Person's  participation
in good faith in a firm commitment  underwriting until the expiration of 40 days
after the date of such acquisition.

            Notwithstanding  anything in this  Agreement  to the  contrary,  for
purposes of this Agreement, no Person is to be treated as the "Beneficial Owner"
of, or to  "beneficially  own," any securities owned by any other Person that is
an Exempt Person.

            (e)  "Board  of  Directors"  means  the  Board of  Directors  of the
Company,  as the same is constituted from time to time, or if the Company ceases
to exist as a result  of a  Business  Combination  or  otherwise,  the  board of
directors of the Company's successor, if any.

            (f)   "Business  Combination" has the meaning set forth in Section
13(a).

            (g) "Business Day" means any day other than a Saturday,  Sunday or a
day on which  banking  institutions  in the State of New York are  authorized or
obligated by law or executive order to close.

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

            (i) "Common  Stock" when used in any context  applicable  prior to a
Business  Combination  means the common stock,  par value $.01 per share, of the
Company (as the same may be changed by reason of any combination, subdivision or
reclassification  of the Common Stock).  "Common Stock" when used with reference
to any Person  (other than the Company  prior to a Business  Combination)  means
shares of capital stock of such Person (if such Person is a corporation)  of any
class or series,  or units of equity interests in such Person (if such Person is
not a corporation) of any class or series, the terms of which shares or units do
not limit (as a fixed amount and not merely in proportional terms) the amount of
dividends  or income  payable or  distributable  on such  shares or units or the
amount of  property  or assets  distributable  on such  shares or units upon any
voluntary or involuntary  liquidation,  dissolution or winding up of such Person
and do not provide  that such shares or units are subject to  redemption  at the
option  of such  Person,  or any  shares  of  capital  stock or units of  equity
interests into which the foregoing shall be  reclassified or changed;  provided,
however,  that if at any time  there are more  than one such  class or series of
capital  stock of or equity  interests  in such Person,  "Common  Stock" of such
Person will include all such classes and series  substantially in the proportion
of the  total  number of  shares  or other  units of each  such  class or series
outstanding at such time.


                                      -3-
<PAGE>

            (j)  "Current  Market  Price" per share of Common  Stock,  Preferred
Stock or  Equivalent  Shares on any date is the  average  of the  daily  closing
prices per share of such Common Stock,  Preferred Stock or Equivalent Shares for
the 30  consecutive  Trading Days (as defined below in this Section 1(j)) ending
on the last  Trading Day  immediately  prior to such date for the purpose of any
computation  under this Agreement except  computations  made pursuant to Section
11(a)(iii),  and for the 10 consecutive Trading Days immediately  following such
date for the purpose of any  computation  under  Section  11(a)(iii);  provided,
however,  that in the event that the  Current  Market  Price per share of Common
Stock,  Preferred  Stock or  Equivalent  Shares  is  determined  during a period
following the  announcement by the issuer of such Common Stock,  Preferred Stock
or  Equivalent  Shares of (i) a dividend or  distribution  on such Common Stock,
Preferred  Stock or  Equivalent  Shares  other  than a  regular  quarterly  cash
dividend,  or (ii) any  subdivision,  combination  or  reclassification  of such
Common Stock,  Preferred Stock or Equivalent Shares, 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 Market Price" shall
be  appropriately  adjusted to take into  account such  dividend,  distribution,
subdivision, combination or reclassification. The closing price for each Trading
Day shall be the last sale price,  regular way, on such day, or, in case no such
sale takes place on such day,  the average of the closing bid and asked  prices,
regular  way,  on  such  day,  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  ("NYSE")  or, if the Common
Stock,  Preferred  Stock or  Equivalent  Shares  are not listed or  admitted  to
trading on the NYSE,  as  reported  in the  principal  consolidated  transaction
reporting  system with  respect to  securities  listed on the  principal  United
States national securities  exchange on which the Common Stock,  Preferred Stock
or Equivalent  Shares are listed or admitted to trading or, if the Common Stock,
Preferred  Stock or  Equivalent  Shares are not listed or admitted to trading on
any United States national  securities  exchange,  the last quoted sale price on
such day or, if not so quoted,  the average of the high bid and low asked prices
in the  over-the-counter  market  on  such  day,  as  reported  by the  National
Association of Securities Dealers, Inc. Automated Quotation System ("Nasdaq") or
such other  system then in use. If on any such day the Common  Stock,  Preferred
Stock or Equivalent Shares are not quoted by any such system, the average of the
closing bid and asked prices on such day as furnished by a  professional  market
maker making a market in the Common Stock,  Preferred Stock or Equivalent Shares
selected by a majority of the Board of Directors shall be used (which  selection
shall be final, binding and conclusive for all purposes). If on such day no such
market  maker is making a market,  the fair market  value of such shares on such
day as  determined  in good faith by a majority of the Board of Directors or the
Board of  Directors  of the  issuer of such  Common  Stock,  Preferred  Stock or
Equivalent  Shares must be used,  which  determination  must be  described  in a
statement filed with the Rights Agent and shall be final, binding and conclusive
for all  purposes.  The term  "Trading  Day" means a day on which the  principal
United States national securities exchange on which the Common Stock,  Preferred
Stock or  Equivalent  Shares are listed or  admitted  to trading is open for the
transaction of business or, if the Common Stock,  Preferred  Stock of Equivalent
Shares are not listed or  admitted  to  trading  on any United  States  national
securities exchange, but are traded in the over-the-counter  market and reported
by  Nasdaq,  then any day for which  Nasdaq  reports  the high bid and low asked
prices in the over-the-counter  market, or if the Common Stock,  Preferred Stock
or Equivalent Shares are not traded in the over-the-counter  market and reported
by  Nasdaq,  then a  Business  Day.  If the


                                      -4-
<PAGE>

Common Stock,  Preferred  Stock or Equivalent  Shares have not been so listed or
admitted   to  trading   for  30  or  more   Trading   Days  or  traded  in  the
over-the-counter  market and  reported  by Nasdaq for 30 or more  Trading  Days,
"Current  Market  Price"  per  share  means the fair  market  value per share as
determined  in good  faith  by a  majority  of the  Board  of  Directors,  whose
determination  must be described in a statement  filed with the Rights Agent and
shall be final, binding and conclusive for all purposes.

            (k)  "Distribution   Date"  means  the  earlier  of  (i)  the  Stock
Acquisition  Date,  and (ii) the tenth Business Day after the Tender Offer Date.
The Board of Directors of the Company may, at its  election,  defer the date set
forth in clause (ii) of the preceding  sentence to a specified  later date or to
an unspecified later date to be determined by a subsequent action or event.

            (l)  "Equivalent  Shares" means any class or series of capital stock
of the Company, other than the Preferred Stock, which is entitled to participate
on a  proportional  basis  with the  Preferred  Stock  in  dividends  and  other
distributions,  including  distributions  upon the  liquidation,  dissolution or
winding up of the Company.  In calculating  the number of any class or series of
Equivalent Shares for purposes of Section 11, the number of shares, or fractions
of a share,  of such class or series of capital  stock that is  entitled  to the
same  dividend  or  distribution  as a whole share of  Preferred  Stock shall be
deemed to be one share.

            (m)  "Exchange  Act" means the  Securities  Exchange Act of 1934, as
amended, and any successor statute.

            (n) "Exchange Date" means the time at which the Rights are exchanged
pursuant to Section 11(a)(iv).

            (o) "Exempt Event" means with respect to any Person, the acquisition
by such Person of Beneficial  Ownership of Common Stock of the Company solely as
a  result  of the  occurrence  of a  Triggering  Event  and the  effect  of such
Triggering  Event  on the last  proviso  of  clause  (ii) of the  definition  of
Beneficial Owner,  other than a Triggering Event in which such Person becomes an
Acquiring Person.

            (p) "Exempt  Person" means (i) the Company,  (ii) any  Subsidiary of
the Company, (iii) any employee benefit plan of the Company or of any Subsidiary
of the Company,  and (iv) any Person  holding Common Stock for any such employee
benefit plan or for employees of the Company or of any Subsidiary of the Company
pursuant to the terms of any such employee benefit plan.

            (q)   "Expiration  Date"  means the Close of  Business  on October
12, 2010.

            (r)  "Institutional  Investor"  means a  Person  who is  principally
engaged in the business of managing investment funds for unaffiliated securities
investors  and,  as part of such  Person's  duties as agent  for  fully  managed
accounts,  holds or exercises voting or dispositive  power over shares of Common
Stock.

            (s)  "Outstanding  Common  Stock" shall be  determined in accordance
with  the  last  sentence  of  Rule  13d-3(d)(1)(i)  of the  General  Rules  and
Regulations  under the Exchange


                                      -5-
<PAGE>

Act (or any successor or comparable provision); provided, however, that any such
calculation  made for  purposes of  determining  the  particular  percentage  of
outstanding  shares of Common Stock of which any Person is the Beneficial  Owner
shall  also  include  any such other  securities  not then  actually  issued and
outstanding  which such Person would be deemed to be the Beneficial Owner of, or
to "beneficially own," pursuant to Section 1(d).

            (t)  "Person"  means  any  individual,  firm,  corporation,  limited
liability   company,   partnership,    joint   venture,   association,    trust,
unincorporated  organization  or other entity,  and shall include any "group" as
that term is used in Rule  13d-5(b) of the General Rules and  Regulations  under
the Exchange Act (or any successor provision).

            (u)  "Preferred  Stock"  means the  Company's  Junior  Participating
Preferred Stock, par value $.01 per share, having the rights and preferences set
forth in the  Certificate  of  Designation,  Preferences  and Rights of Series A
Junior Participating Preferred Stock attached hereto as Exhibit A.

            (v)  "Principal  Party"  means  (i) in  the  case  of  any  Business
Combination  described  in clause  (i),  (ii) or (iii) of the first  sentence of
Section 13(a),  (A) the Person that is the issuer of any  securities  into which
shares  of Common  Stock of the  Company  are  converted  or for which  they are
exchanged  in such  Business  Combination  or,  if there  is more  than one such
issuer,  the issuer of the Common Stock which has the greatest  aggregate market
value or (B) if no securities are so issued, the Person that survives or results
from such Business  Combination  or, if there is more than one such Person,  the
Person the Common Stock of which has the greatest  aggregate  market value;  and
(ii) in the case of any  Business  Combination  described  in clause (iv) of the
first sentence in Section 13(a),  the Person that receives the greatest  portion
of the property,  assets or earning power transferred  pursuant to such Business
Combination  or, if each  Person  that is a party to such  Business  Combination
receives  the  same  portion  of  the  property,  assets  or  earning  power  so
transferred  or if the Person  receiving  the greatest  portion of the assets or
earning power cannot reasonably be determined,  whichever of such Persons is the
issuer of the  Common  Stock  which has the  greatest  aggregate  market  value;
provided,  however, that in any such case, if the Common Stock of such Person is
not at such  time and has 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 of one or more other Persons,  then (A) "Principal
Party"  refers to whichever  of such other  Persons has Common Stock that is and
has been  continuously  over the  preceding  12-month  period  registered  under
Section 12 of the Exchange  Act; (B) if the Common Stocks of two or more of such
other  Persons  are and have been so  registered,  "Principal  Party"  refers to
whichever of such other  Persons is the issuer of the Common Stock which has the
greatest  aggregate  market  value;  or (C) if the Common  Stock of none of such
other Persons has been so registered,  "Principal  Party" refers to whichever of
such other Persons (other than an individual) is the Person which has the equity
securities  with the greatest  aggregate  market  value.  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 above apply to each of the chains of ownership  having an interest in such
joint  venture as if such Person 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  Section  13 in the same  ratio  as their  direct  or
indirect interests in such Person bear to the total of such interests.


                                      -6-
<PAGE>

            (w) "Purchase Price" with respect to each Right is initially $175.00
per one  one-hundredth  of a share  of  Preferred  Stock,  shall be  subject  to
adjustment  from time to time as  provided  in  Sections 11 and 13, and shall be
payable in lawful money of the United  States of America in cash or by certified
check or bank draft payable to the order of the Company.

            (x)   "Record  Date"  means the Close of  Business  on November 9,
2000.

            (y)  "Redemption  Date"  means  the time at  which  the  Rights  are
scheduled to be redeemed as provided in Section 23.

            (z)   "Redemption  Price"  has the  meaning  given to such term in
Section 23.

            (aa)  "Regular   Trading   Activities"   means  trading   activities
undertaken in the Institutional Investor's normal course of business and not for
the purpose of  exercising,  either alone or in concert  with any other  Person,
power to direct or cause the  direction  of the  management  and policies of the
Company.

            (bb) "Rights Agent" means Fleet National Bank or any co-Rights Agent
or  successor  Rights Agent  appointed  by the Company  pursuant to Section 2 or
Section 21, respectively.

            (cc)  "Securities Act" means the Securities Act of 1933, as amended,
and any successor statute.

            (dd)  "Stock  Acquisition  Date"  means the first  date  (including,
without  limitation,  any  such  date  which  is on or  after  the  date of this
Agreement  and prior to the issuance of the Rights) of public  disclosure by the
Company,  an Acquiring Person or otherwise that a Person has become an Acquiring
Person.

            (ee)  "Subsidiary"  has the meaning given to such term in Rule 12b-2
of the General Rules and Regulations under the Exchange Act, as in effect on the
date of this Agreement.

            (ff) "Tender  Offer Date" means the date of  commencement  or public
disclosure  of an  intention to commence  (including  any such  commencement  or
public  disclosure which occurs on or after the date of this Agreement and prior
to the issuance of the Rights) a tender offer or exchange  offer by a Person if,
after acquiring the maximum number of securities  sought pursuant to such offer,
such Person, or any Affiliate or Associate of such Person, would be an Acquiring
Person.

            (ff)  "Triggering   Event"   occurs  when  a  Person   becomes  an
Acquiring Person.


                                      -7-
<PAGE>

            Section 2.  Appointment of Rights Agent. The Company hereby appoints
the Rights  Agent to act as agent for the Company 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 shall in no event
be liable for, the acts or omissions of any such co-Rights Agents.

            Section 3.  Issuance of Rights Certificates.

            (a) Until the  Distribution  Date: (i) the Rights shall be issued in
respect of and shall be evidenced by the certificates representing the shares of
Common  Stock  issued and  outstanding  on the Record  Date and shares of Common
Stock issued or which become  outstanding after the Record Date and prior to the
earliest of the  Distribution  Date, the Redemption  Date, the Exchange Date and
the Expiration Date (which certificates for Common Stock shall be deemed to also
be certificates  evidencing the Rights), and not by separate certificates;  (ii)
the  registered  holders  of such  shares  of  Common  Stock  shall  also be the
registered  holders of the Rights  associated  with such  shares;  and (iii) the
Rights shall be  transferable  only in connection with the transfer of shares of
Common Stock and the surrender for transfer of any  certificate  for such shares
of Common Stock shall also  constitute  the surrender for transfer of the Rights
associated  with the  shares of Common  Stock  represented  thereby.  As soon as
practicable after the Company has notified the Rights Agent of the occurrence of
the  Distribution  Date,  the Company will prepare and execute,  and the Company
will  deliver to the Rights  Agent to be  countersigned,  which the Rights Agent
shall do, and the Rights  Agent shall mail,  by  first-class,  insured,  postage
prepaid  mail,  to each  record  holder of the  Common  Stock as of the Close of
Business on the  Distribution  Date, as shown by the records of the Company,  at
the  address of such  holder  shown on such  records,  one or more  certificates
evidencing the Rights  ("Rights  Certificates"),  in  substantially  the form of
Exhibit B hereto,  evidencing  one Right (as adjusted from time to time pursuant
to this  Agreement)  for each share of Common Stock so held.  From and after the
Distribution   Date,  the  Rights  will  be  evidenced  solely  by  such  Rights
Certificates.  In the event that an adjustment in the number of Rights per share
of  Common  Stock  has been  made  pursuant  to  Section  11(o),  at the time of
distribution of the Rights Certificates,  the Company may make the necessary and
appropriate  adjustments  (in  accordance  with  Section  14(a)) so that  Rights
Certificates  representing only whole numbers of Rights are distributed and cash
is paid in lieu of any fractional Rights.

            (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 Stock, in
substantially  the form of  Exhibit  C hereto  (the  "Summary  of  Rights"),  by
first-class,  postage-prepaid  mail, to each record holder of Common Stock as of
the close of business on the Record Date (other than any Acquiring Person or any
Associate or Affiliate of any Acquiring  Person),  at the address of such holder
shown on the records of the  Company.  With respect to  certificates  for Common
Stock 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 together with the Summary of Rights. Until the Distribution Date (or the
earlier of the  Redemption  Date and the  Expiration  Date),  the  surrender for
transfer of any  certificate  for Common Stock  outstanding  on the Record Date,
with or  without a copy of the  Summary of Rights,  shall  also  constitute  the
transfer of the Rights associated with the Common Stock represented thereby.


                                      -8-
<PAGE>

            (c) Rights  shall be issued in respect of all shares of Common Stock
which are issued or sold by the  Company  after the Record Date but prior to the
earliest of the Distribution Date, the Redemption Date, the Exchange Date or the
Expiration Date. In addition,  in connection with the issuance or sale of Common
Stock by the Company  following the Distribution  Date and prior to the earliest
of the Redemption  Date,  the Exchange Date or the Expiration  Date, the Company
shall,  with  respect  to Common  Stock so issued  or sold  pursuant  to (i) the
exercise of stock  options  issued prior to the  Distribution  Date or under any
employee plan or  arrangement  created prior to the  Distribution  Date, or (ii)
upon the exercise,  conversion  or exchange of securities  issued by the Company
prior  to  the  Distribution   Date,   issue  Rights  and  Rights   Certificates
representing  the appropriate  number of Rights in connection with such issuance
or sale;  provided,  however,  that (x) no such  Rights and Rights  Certificates
shall be issued 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 Rights  Certificates
would be issued; and (y) no such Rights and Rights Certificates shall be issued,
if, and to the extent that,  appropriate  adjustment  shall  otherwise have been
made in lieu of the issuance thereof.  Certificates issued after the Record Date
representing  shares of Common Stock outstanding on the Record Date or shares of
Common  Stock  issued  after the Record  Date but prior to the  earliest  of the
Distribution  Date,  the  Redemption  Date, the Exchange Date and the Expiration
Date shall have impressed,  printed,  written on or otherwise  affixed to them a
legend substantially in the following form:

            This  certificate  also  evidences and entitles the holder hereof to
      certain Rights as set forth in a Rights  Agreement  between ATMI, Inc. and
      Fleet  National  Bank, as Rights Agent,  dated as of October 13, 2000 (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 ATMI,  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.  ATMI, Inc. will mail
      to the holder of this certificate a copy of the Rights  Agreement  without
      charge  after  receipt  of  a  written  request  therefor.  Under  certain
      circumstances, as set forth in the Rights Agreement, Rights that were, are
      or become  beneficially  owned by Acquiring Persons or their Associates or
      Affiliates (as such terms are defined in the Rights  Agreement) may become
      null  and  void  and the  holder  of any of  such  Rights  (including  any
      subsequent holder) shall not have any right to exercise such Rights.

            Section 4.  Form of Rights Certificates.

            (a) The Rights  Certificates  (and the form of  election to purchase
shares and the form of assignment to be printed on the reverse thereof) shall be
in  substantially  the form of  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
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 any securities  association on whose interdealer  quotation system the
Rights  may be from time to time  authorized  for  quotation,  or to  conform to
usage.  Subject to the provisions of this  Agreement,  the Rights


                                      -9-
<PAGE>

Certificates,  whenever issued,  shall be dated as of the Distribution Date, and
on their face shall  entitle  the  holders  thereof to  purchase  such number of
shares of Preferred  Stock as shall be set forth  therein at the Purchase  Price
set forth therein,  but the number and kind of such  securities and the Purchase
Price shall be subject to adjustment as provided in this Agreement.

            (b) Notwithstanding  any other provision of this Agreement,  (i) any
Rights  Certificate  issued  pursuant to this Agreement that  represents  Rights
beneficially owned or formerly  beneficially owned, on or after the Distribution
Date,  by a Person  known by the  Company to be: (A) an  Acquiring  Person or an
Associate  or  Affiliate  of an  Acquiring  Person;  (B) a  direct  or  indirect
transferee  of an  Acquiring  Person (or of an  Associate  or  Affiliate of such
Acquiring  Person) who becomes or becomes  entitled to be a transferee after the
Acquiring  Person  becomes  such;  or (C) a direct or indirect  transferee of an
Acquiring Person (or of an Associate or Affiliate of such Acquiring  Person) who
becomes or becomes entitled to be a transferee prior to or concurrently with the
Acquiring Person becoming such and receives such Rights pursuant to either (x) a
direct  or  indirect  transfer  (whether  or not  for  consideration)  from  the
Acquiring Person (or from an Associate or Affiliate of such Acquiring Person) to
holders of equity  interests in such  Acquiring  Person (or to holders of equity
interests  in an Associate  or  Affiliate  of such  Acquiring  Person) or to any
Person with whom such  Acquiring  Person (or an  Associate  or Affiliate of such
Acquiring  Person) has any continuing  agreement,  arrangement or  understanding
regarding the transferred  Rights,  or (y) a direct or indirect transfer which a
majority of the Board of Directors has determined is part of a plan, arrangement
or  understanding  which has as a primary  purpose  or effect the  avoidance  of
Section 7(e); or (ii) any Rights  Certificate  issued pursuant to this Agreement
upon  transfer,  exchange,   replacement  or  adjustment  of  any  other  Rights
Certificate  beneficially  owned by a Person  referred to in this Section  4(b),
shall contain (to the extent feasible) the following legend:

            The  Rights  represented  by  this  Rights  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 Rights  Certificate and the
      Rights  represented  hereby may become null and void in the  circumstances
      specified in Section 7(e) of the Rights Agreement.

            Section 5.  Execution, Countersignature and Registration.

            (a) Each  Rights  Certificate  shall be  executed  on  behalf of the
Company  by the  Company's  Chairman  of the  Board,  Chief  Executive  Officer,
President or any Vice President,  either manually or by facsimile signature, and
shall have affixed thereto the Company's seal or a facsimile thereof which shall
be  attested  by the  Company's  Secretary  or an  Assistant  Secretary,  either
manually  or  by  facsimile   signature.   Each  Rights   Certificate  shall  be
countersigned  by the Rights  Agent  either  manually  or, if  permitted  by the
Company, by facsimile signature and shall not be valid for any purpose unless so
countersigned. In case any officer of the Company who shall have signed a Rights
Certificate   shall   cease  to  be  such   officer   of  the   Company   before
countersignature  by the Rights  Agent and issuance and delivery by the Company,
such Rights  Certificate  nevertheless  may be countersigned by the Rights Agent
and issued and delivered with the same force and effect as though the Person who
signed such Rights Certificate had not ceased to be such officer of the Company;
and any Rights  Certificate may be signed on behalf of the


                                      -10-
<PAGE>

Company by any Person who, at the actual  date of the  execution  of such Rights
Certificate,  shall be a proper  officer  of the  Company  to sign  such  Rights
Certificate,  although at the date of the  execution of this  Agreement any such
Person was not such an officer.

            (b) Following the Distribution  Date, the Rights Agent shall keep or
cause  to  be  kept,  at  its  principal  corporate  trust  office,   books  for
registration  and transfer of the Rights  Certificates  issued  hereunder.  Such
books shall show the names and addresses of the respective holders of the Rights
Certificates, the number of Rights evidenced by each Rights Certificate, and the
certificate number and the date of issuance of each Rights Certificate.

            Section  6.  Transfer,  Division,  Combination  and  Exchange  of
Rights Certificates; Mutilated, Destroyed, Lost or Stolen Rights Certificates.

            (a) Subject to the  provisions  of Section 14, at any time after the
Close of  Business  on the  Distribution  Date  and at or prior to the  Close of
Business on the  earliest  of the  Redemption  Date,  the  Exchange  Date or the
Expiration  Date,  any  Rights   Certificate  or  Rights   Certificates  may  be
transferred,  divided,  combined or exchanged for another Rights  Certificate or
Rights  Certificates,  entitling the registered holder to purchase a like number
of shares of Preferred  Stock (or,  following a  Triggering  Event or a Business
Combination,  other securities,  cash or other property,  as the case may be) as
the Rights Certificate or Rights Certificates  surrendered  entitled such holder
to purchase immediately prior to such surrender.  Any registered holder desiring
to transfer,  divide, combine or exchange any Rights Certificate shall make such
request in writing delivered to the Rights Agent, and shall surrender the Rights
Certificate  or Rights  Certificates  to be  transferred,  divided,  combined or
exchanged at the principal  corporate office of the Rights Agent.  Thereupon the
Rights  Agent shall  countersign  and deliver to the Person  entitled  thereto a
Rights Certificate or Rights Certificates,  as the case may be, as so requested.
As a condition to such transfer, division,  combination or exchange, the Company
may require payment by the surrendering  holder of a sum sufficient to cover any
tax or governmental charge that may be imposed in connection therewith.  Neither
the  Rights  Agent  nor the  Company  shall  be  obligated  to take  any  action
whatsoever  with  respect  to  the  transfer  of  any  such  surrendered  Rights
Certificate  until the registered  holder shall have duly completed and executed
the form of assignment on the reverse side of such Rights  Certificate and shall
have provided such additional  evidence of the identity of the Beneficial  Owner
(or such former or proposed Beneficial Owner) thereof or such Beneficial Owner's
Affiliates or Associates as the Company shall reasonably request.

            (b) Upon  receipt by the  Company  and the Rights  Agent of evidence
reasonably satisfactory to them of the loss, theft, destruction or mutilation of
a Rights Certificate,  and, in case of loss, theft or destruction,  of indemnity
or security  reasonably  satisfactory to them, and  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 Rights  Certificate  if
mutilated,  the Company will make and deliver a new Rights  Certificate  of like
tenor to the Rights Agent for  countersignature by the Rights Agent and delivery
to the  registered  owner in lieu of the  Rights  Certificate  so lost,  stolen,
destroyed or mutilated.


                                      -11-
<PAGE>

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

            (a) Each Right shall entitle  (except as otherwise  provided in this
Agreement) the registered holder thereof,  upon the exercise thereof as provided
in this  Agreement,  to purchase,  for the Purchase Price, at any time after the
Distribution Date and prior to the earliest of the Expiration Date, the Exchange
Date or the Redemption Date, one  one-hundredth  (1/100) of a share of Preferred
Stock (or other  securities,  cash or other property or assets,  as the case may
be, as provided herein),  subject to adjustment from time to time as provided in
Sections 11 and 13.

            (b) The registered holder of any Rights Certificate may exercise the
Rights  evidenced  thereby  (except as otherwise  provided in this Agreement) in
whole or in part  (except that no fraction of a Right may be  exercised)  at any
time after the  Distribution  Date and prior to the  earliest of the  Expiration
Date,  the Exchange  Date or the  Redemption  Date, by  surrendering  the Rights
Certificate,  with the form of election to purchase on the reverse  side thereof
duly executed,  to the Rights Agent at the principal  corporate  trust office of
the Rights  Agent,  together  with  payment of the  Purchase  Price for each one
one-hundredth of a share of Preferred Stock (or other securities,  cash or other
property  or  assets,  as the case may be, as  provided  herein) as to which the
Rights are exercised.

            (c) Upon receipt of a Rights  Certificate  representing  exercisable
Rights,  with the form of election to purchase  duly  executed,  accompanied  by
payment of the Purchase Price for each one one-hundredth of a share of Preferred
Stock (or other  securities,  cash or other property or assets,  as the case may
be, as provided  herein) to be purchased and an amount in cash,  certified  bank
check or bank draft payable to the order of the Company equal to any  applicable
transfer tax required to be paid by the surrendering  holder pursuant to Section
9(d),  the Rights  Agent shall,  subject to the  provisions  of this  Agreement,
thereupon  promptly (i)(A) requisition from any transfer agent for the Preferred
Stock (or make  available,  if the Rights  Agent is the  transfer  agent for the
Preferred Stock)  certificates for the total number of one  one-hundredths  of a
share of Preferred  Stock to be purchased  (and the Company  hereby  irrevocably
authorizes its transfer agent to comply with all such  requests),  or (B) if the
Company  shall have  elected to deposit the total  number of shares of Preferred
Stock issuable upon exercise of the Rights with a depositary agent,  requisition
from the depositary agent depositary  receipts  representing  such number of one
one-hundredths  of a share of Preferred  Stock as are to be purchased  (in which
case  certificates for the Preferred Stock represented by such receipts shall be
deposited by the transfer agent with the depositary agent) and the Company shall
direct the depositary  agent to comply with such request;  (ii) 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 Rights  Certificate,  registered
in such  name or  names  as may be  designated  by such  holder;  and  (iii)  if
appropriate,  requisition from the Company the amount of cash to be paid in lieu
of issuance of  fractional  shares in accordance  with Section 14 and,  promptly
after  receipt  thereof,  cause the same to be delivered to or upon the order of
the registered holder of such Rights Certificate.  In the event that the Company
is obligated to issue other securities (including shares of Common Stock) of the
Company,  pay cash and/or  distribute other property pursuant to this Agreement,
the Company will make all arrangements  necessary so that such other securities,
cash and/or other property are available for  distribution  by the Rights Agent,
if and when appropriate.


                                      -12-
<PAGE>

            (d) In case the registered  holder of any Rights  Certificate  shall
exercise less than all the Rights evidenced  thereby,  a new Rights  Certificate
evidencing Rights equivalent to the Rights remaining unexercised shall be issued
by the  Rights  Agent and  delivered  to, or upon the order of,  the  registered
holder of such Rights Certificate or to his duly authorized assigns,  subject to
the provisions of Sections 6 and 14.

            (e) Notwithstanding  anything in this Agreement to the contrary, any
Rights that are or were formerly beneficially owned on or after the Distribution
Date by (i) an  Acquiring  Person or any  Associate or Affiliate of an Acquiring
Person;  (ii) a direct or indirect  transferee of an Acquiring  Person (or of an
Associate  or  Affiliate  of such  Acquiring  Person)  who  becomes,  or becomes
entitled to be, a transferee after the Acquiring Person becomes such; or (iii) a
direct or indirect  transferee  of an  Acquiring  Person (or of an  Associate or
Affiliate of such Acquiring  Person) who becomes,  or becomes  entitled to be, a
transferee prior to or concurrently  with the Acquiring Person becoming such and
receives  such  Rights  pursuant  to either  (A) a direct or  indirect  transfer
(whether  or not for  consideration)  from  the  Acquiring  Person  (or  from an
Associate or Affiliate of such Acquiring  Person) to holders of equity interests
in such Acquiring  Person (or to holders of equity interests in any Associate or
Affiliate  of such  Acquiring  Person) or to any Person with whom the  Acquiring
Person  (or an  Associate  or  Affiliate  of  such  Acquiring  Person)  has  any
continuing  agreement,  arrangement or  understanding  regarding the transferred
Rights,  and (B) a direct or indirect  transfer which a majority of the Board of
Directors  of  the  Company  determines  is  part  of  a  plan,  arrangement  or
understanding  which has as a primary  purpose or effect the  avoidance  of this
Section 7(e),  shall,  from and after the first occurrence of a Triggering Event
and without any  further  action,  be null and void and no holder of such Rights
shall have any rights  whatsoever with respect to such Rights whether under this
Agreement or otherwise;  provided,  however,  that,  in the case of  transferees
described  in clause  (ii) or clause  (iii) of this  Section  7(e),  any  Rights
beneficially  owned by such transferee shall be null and void only if and to the
extent such Rights were formerly  beneficially owned by a Person who was, at the
time such  Person  beneficially  owned  such  Rights,  or who later  became,  an
Acquiring  Person or an Affiliate or Associate  of such  Acquiring  Person.  The
Company shall use all  reasonable  efforts to ensure that the provisions of this
Section 7(e) and of Section  4(b) are complied  with but shall have no liability
to any holder of a Rights  Certificate or to any other Person as a result of the
Company's failure to make, or any delay in making (including any such failure or
delay by the Board of Directors of the Company), any determinations with respect
to an Acquiring Person or its Affiliates,  Associates or transferees  under this
Section 7(e) or any other provision of this Agreement.

            (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 the registered  holder of a Rights  Certificate  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 certificate  contained
in 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  or  proposed
Beneficial  Owner)  thereof or the  Affiliates or Associates of such  Beneficial
Owner (or former or proposed  Beneficial  Owner) as the Company shall reasonably
request.


                                      -13-
<PAGE>

            Section 8. Cancellation and Destruction of Rights Certificates.  All
Rights Certificates surrendered for the purpose of exercise, transfer, division,
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 surrendered  to the Rights Agent,  shall be canceled by it, and no Rights
Certificates  shall be issued in lieu therefor except as expressly  permitted by
the provisions of this Agreement.  The Company shall deliver to the Rights Agent
for  cancellation  and  retirement,  and the  Rights  Agent  shall so cancel and
retire,  any other  Rights  Certificate  purchased  or  acquired  by the Company
otherwise  than upon the exercise  thereof.  The Rights Agent shall  deliver all
canceled Rights Certificates to the Company, or shall, at the written request of
the Company,  destroy such canceled Rights Certificates,  and in such case shall
deliver a certificate of destruction thereof to the Company.

            Section 9.  Reservation and Availability of Preferred Stock.

            (a) The  Company  covenants  and  agrees  that it will  cause  to be
reserved  and kept  available  at all times out of its  authorized  and unissued
shares of Preferred Stock or its authorized and issued shares of Preferred Stock
held in its treasury (and,  following the occurrence of a Triggering  Event or a
Business Combination,  out of its authorized and unissued shares of Common Stock
and/or other  securities  or out of its  authorized  and issued shares of Common
Stock and/or other securities held in its treasury) free from preemptive  rights
or any right of first refusal,  a sufficient number of shares of Preferred Stock
(and, following the occurrence of a Triggering Event or a Business  Combination,
shares of Common Stock and/or other  securities)  to permit the exercise in full
of all Rights from time to time outstanding.

            (b)  The  Company  further  covenants  and  agrees,  so  long as the
Preferred  Stock (and,  following  the  occurrence  of a  Triggering  Event or a
Business  Combination,  shares of Common Stock and/or other securities) issuable
upon the  exercise  of  Rights  may be  listed  on any  United  States  national
securities  exchange or quoted on any  automated  quotation  system,  to use its
reasonable best efforts to cause, from and after the time that the Rights become
exercisable,  all such shares and/or other securities reserved for such issuance
to be listed on such exchange or quoted on such automated  quotation system upon
official notice of issuance upon such exercise.

            (c) The Company  further  covenants and agrees that it will take all
such action as may be  necessary  to ensure that all shares of  Preferred  Stock
(and, following the occurrence of a Triggering Event or a Business  Combination,
shares of Common Stock and/or other  securities)  delivered upon the exercise of
Rights shall, at the time of delivery of the certificates for such shares and/or
such other securities  (subject to payment of the Purchase  Price),  be duly and
validly authorized and issued, fully paid, nonassessable,  freely tradeable, not
subject to liens or encumbrances, and free of preemptive rights, rights of first
refusal or any other  restrictions  or  limitations on the transfer or ownership
thereof, of any kind or nature whatsoever.

            (d) 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  original  issuance  or  delivery of the Rights
Certificates  or of any  certificates  for shares of Preferred  Stock (or Common
Stock and/or other securities,  as the case may be) upon the exercise of Rights.
The Company  shall not,  however,  be required to (i) pay any transfer tax which
may be payable in respect of any  transfer  involved in the issuance or delivery
of any Rights


                                      -14-
<PAGE>

Certificates  or the  issuance  or delivery  of any  certificates  for shares of
Preferred Stock (or Common Stock and/or other  securities as the case may be) to
a Person other than, or in a name other than that of, the  registered  holder of
the Rights  Certificate  evidencing  Rights  surrendered  for exercise;  or (ii)
transfer or deliver any Rights  Certificate or issue or deliver any certificates
for shares of Preferred  Stock (or Common Stock and/or other  securities  as the
case may be) upon the  exercise of any Rights until any such tax shall have been
paid (any such tax being payable by the holder of such Rights Certificate at the
time  of  surrender)  or  until  it  has  been   established  to  the  Company's
satisfaction that no such tax is due.

            (e) The Company shall use its reasonable best efforts (i) as soon as
practicable  following the Stock Acquisition Date (provided the consideration to
be delivered by the Company upon  exercise of the Rights has been  determined in
accordance with Section 11(a)(iii)),  or as soon as is otherwise required by law
following  the  Distribution  Date,  as the case may be, to  prepare  and file a
registration  statement on an  appropriate  form under the  Securities  Act with
respect to the securities purchasable upon exercise of the Rights; (ii) to cause
such  registration  statement to become  effective as soon as practicable  after
such filing; and (iii) to cause such registration  statement to remain effective
(with a prospectus at all times meeting the  requirements of the Securities Act)
until the earlier of (A) the date as of which  Rights are no longer  exercisable
for such  securities or (B) the Expiration  Date. The Company shall also use its
reasonable  best efforts to take such action as may be necessary or  appropriate
under,  or to ensure  compliance  with, the securities or "blue sky" laws of the
various  states in connection  with the exercise of the Rights.  The Company may
temporarily  suspend,  for a period of time not to exceed 90 days after the date
set forth in clause (i) of this Section 9 (e), the  exercisability of the Rights
in order to prepare and file such registration statement and permit it to become
effective.   Upon  any  such  suspension,   the  Company  shall  make  a  public
announcement  stating that the exercisability of the Rights has been temporarily
suspended, as well as a public announcement at such time as the suspension is no
longer  in  effect.  Notwithstanding  any  provision  of this  Agreement  to the
contrary,  the Rights shall not be  exercisable in any  jurisdiction  unless the
requisite  qualification in such jurisdiction shall have been obtained and until
a registration statement has been declared effective under the Securities Act.

            Section 10.  Preferred  Stock Record Date. Each Person in whose name
any  certificate  for shares of  Preferred  Stock (or Common  Stock and/or other
securities,  as the case may be) is issued upon the exercise of Rights shall for
all  purposes  be deemed to have  become the  holder of record of the  Preferred
Stock (or Common Stock and/or other securities,  as the case may be) represented
thereby on, and such certificate  shall be dated, the date upon which the Rights
Certificate  evidencing  such  Rights was duly  surrendered  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  Stock (or Common Stock and/or other  securities,  as the case may be)
transfer  books of the Company are closed,  such Person  shall be deemed to have
become the record  holder of such  shares (or  Common  Stock  and/or  such other
securities,  as the case may be) on, and such  certificate  shall be dated,  the
next  succeeding  Business  Day on which the  Preferred  Stock (or Common  Stock
and/or other  securities,  as the case may be) transfer books of the Company are
open.


                                      -15-
<PAGE>

            Section  11.  Adjustments  to  Purchase  Price,  Number of Shares or
Number of Rights.  The Purchase Price,  the number and kind of securities,  cash
and other  property  obtainable  upon  exercise  of each Right and the number of
Rights  outstanding shall be subject to adjustment from time to time as provided
in this Section 11.

            (a) (i) In the event the  Company  shall at any time on or after the
date of  this  Agreement  (A)  pay a  dividend  or  make a  distribution  on the
outstanding  shares of Preferred Stock payable in shares of Preferred Stock, (B)
subdivide (by a stock split or otherwise) the outstanding Preferred Stock into a
larger number of shares, (C) combine (by a reverse stock split or otherwise) the
outstanding  Preferred  Stock into a smaller number of shares,  or (D) issue any
securities in a  reclassification  of the Preferred  Stock  (including  any such
reclassification  in  connection  with a  consolidation  or  merger in which the
Company is the  surviving  corporation),  except as  otherwise  provided in this
Section  11(a),  then in each such event the Purchase  Price and the  Redemption
Price set forth in  Section  23, as each is in effect at the time of the  record
date  for  such  dividend  or  distribution,  or of the  effective  date of such
subdivision, combination or reclassification,  and the number and kind of shares
of  capital  stock  or  interests  therein  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 or  interests  therein  which,  if such Right had been  exercised
immediately  prior to such date and at a time when the Preferred  Stock 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.  If an event  occurs  which would  require an
adjustment  under  both  this  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) Upon the first occurrence of a Triggering  Event,  proper
provision  shall be made so that  each  holder of a Right,  except as  otherwise
provided in this Agreement,  shall thereafter have the right to receive, and the
Company shall issue,  upon exercise thereof at a price equal to the then-current
Purchase  Price  multiplied  by the number of one  one-hundredths  of a share of
Preferred  Stock for which a Right is then  exercisable  in accordance  with the
terms of this Agreement,  in lieu of the number of one one-hundredths of a share
of Preferred Stock or other securities receivable upon exercise of a Right prior
to the occurrence of the Triggering Event, such number of shares of Common Stock
of the  Company  as shall  equal the  result  obtained  by (x)  multiplying  the
then-current  Purchase  Price  by the  number  of  one-hundredths  of a share of
Preferred  Stock or other  securities  for  which a Right  was then  exercisable
(without giving effect to such  Triggering  Event) and (y) dividing that product
by 50% of the Current  Market Price per share of Common Stock on the date of the
occurrence of the  Triggering  Event (such number of shares being referred to as
the "Adjustment  Shares");  provided,  however, that if the transaction or event
that would  otherwise  give rise to the foregoing  adjustment is also subject to
the provisions of Section 13, then only the provisions of Section 13 shall apply
and no  adjustment  shall be made pursuant to this Section  11(a)(ii).  Upon the
occurrence of such Triggering  Event,  the Purchase Price required to be paid in
order to exercise a Right shall be  unchanged,  and the Purchase  Price shall be
appropriately  adjusted  to  reflect,  and shall  thereafter  mean,  the  amount
required to be paid per share of Common Stock upon exercise of a Right.


                                      -16-
<PAGE>

                  (iii) In lieu of issuing  shares of Common Stock in accordance
with Section 11(a)(ii), the Company may, if a majority of the Board of Directors
of the Company  determines  that such action is necessary or appropriate and not
contrary  to the  interests  of holders of Rights,  elect to,  and,  if that the
number  of  shares  of  Common  Stock  which  are  authorized  by the  Company's
certificate  of  incorporation,  but which are not  outstanding  or reserved for
issuance for purposes other than upon exercise of the Rights, are not sufficient
to  permit  the  exercise  in full of the  Rights  in  accordance  with  Section
11(a)(ii),  the  Company  shall  take all such  action  as may be  necessary  to
authorize,  issue or pay, upon the exercise of Rights, cash (including by way of
a reduction of the Purchase Price), debt securities,  property,  assets or other
equity securities of the Company (including, without limitation, shares or units
of shares of  preferred  stock)  which the Board of Directors of the Company has
determined (which  determination shall be final,  binding and conclusive for all
purposes)  to have  essentially  the same value or economic  rights as shares of
Common  Stock  (such  equity  securities  referred  to herein as  "Common  Stock
Equivalents),  or any  combination of the foregoing,  having an aggregate  value
equal to the value of the  Adjustment  Shares  which  otherwise  would have been
issuable  pursuant  to  Section  11(a)(ii),   which  aggregate  value  shall  be
determined by a majority of the Board of Directors (which determination shall be
final,  binding and conclusive for all purposes).  If a majority of the Board of
Directors  determines  to issue or deliver  any equity  securities  (other  than
Common Stock or Common Stock Equivalents), debt securities and/or other property
or assets  pursuant to this  Section  11(a)(iii),  the value of such  securities
and/or  property  or assets  shall be  determined  by a majority of the Board of
Directors  of the  Company  based  upon the  advice of a  nationally  recognized
investment  banking firm selected by a majority of the Board of Directors of the
Company  (which  determination  shall be final,  binding and  conclusive for all
purposes).  If the  Company is required to make  adequate  provision  to deliver
value pursuant to the first sentence of this Section  11(a)(iii) and the Company
shall not have made such adequate  provision to deliver value within ninety (90)
days  following the first  occurrence of a Triggering  Event (the  "Substitution
Period"),  then  notwithstanding  any  provision  of Section  11(a)(ii)  or this
Section  11(a)(iii) to the contrary,  the Company shall be obligated to deliver,
upon the surrender for exercise of a Right and without  requiring payment of the
Purchase  Price,  shares of Common Stock (to the extent  available) and then, if
necessary,  cash,  which shares and/or cash have an aggregate value equal to the
excess of the value of the Adjustment  Shares over the Purchase  Price.  If both
Common Stock and cash are to be delivered  pursuant to the  preceding  sentence,
amounts of both Common Stock and cash shall be delivered  upon surrender of each
Right in a ratio of Common  Stock to cash that bears the same ratio as the total
value of all  Common  Stock to be  delivered  (as  determined  pursuant  to this
Section  11(a)(iii))  bears to the  total  value  of all  cash to be  delivered;
provided,  however,  that the Company may adjust such ratio to avoid issuing any
fractional shares of Common Stock so long as the method of adjustment is applied
consistently  to each holder of Rights  entitled to receive  value with  respect
thereto  pursuant  to this  Section  11(a)(iii).  To the extent that the Company
determines  that some action is to be taken  pursuant to the first  and/or third
sentences of this Section 11(a)(iii), the Company may suspend the exercisability
of the  Rights  but in no  event to a time  later  than  the  expiration  of the
Substitution  Period.  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, as well as a public announcement at such time as the
suspension is no longer in effect. For purposes of this Section 11(a)(iii),  the
value of each  Adjustment  Share shall be the Current  Market Price per share of
the  Common  Stock on the Stock  Acquisition  Date and the per share or


                                      -17-
<PAGE>

per unit  value of any  Common  Stock  Equivalent  shall be  deemed to equal the
Current Market Price per share of the Common Stock on such date.

                  (iv) A majority of the Board of  Directors of the Company may,
at its option, at any time and from time to time after the first occurrence of a
Triggering  Event,  cause  the  Company  to  exchange,  for  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  7(e)),  shares of Common
Stock or Common Stock  Equivalents  at an exchange  ratio of one share of Common
Stock per Right,  appropriately  adjusted  to  reflect  any stock  split,  stock
dividend or similar transaction occurring after the date of this Agreement (such
exchange  ratio being  hereinafter  referred to as the  "Exchange  Ratio").  Any
partial  exchange  shall be  effected on a pro rata basis based on the number of
Rights (other than Rights which have become void  pursuant to the  provisions of
Section 7(e)) held by each holder of Rights.  Notwithstanding the foregoing, the
Board of Directors  shall not be  empowered to effect such  exchange at any time
after any Person (other than an Exempt Person), together with all Affiliates and
Associates of such Person,  becomes the  Beneficial  Owner of 50% or more of the
Outstanding Common Stock.

            Immediately  upon the action of a majority of the Board of Directors
of the Company  ordering  the  exchange of any Rights  pursuant to this  Section
11(a)(iv)  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 shares of Common Stock and/or
Common Stock  Equivalents 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 and, in addition,  the Company shall promptly mail a notice
of any such  exchange to all of the holders of such  Rights in  accordance  with
Section 25; provided,  however, that the failure to give, any delay in giving or
any defect in, such notice shall not affect the validity of such exchange.  Each
such  notice of  exchange  will  state the method by which the  exchange  of the
Common Stock or Common Stock Equivalents for Rights will be effected and, in the
event of any partial exchange, the number of Rights which will be exchanged.  In
the event that the number of shares of Common Stock which is authorized  but not
outstanding  or reserved for issuance for a purpose  other than  exercise of the
Rights is not  sufficient  to permit any exchange of Rights as  contemplated  in
accordance  with this Section  11(a)(iv),  the Board of Directors of the Company
shall take all such action  within its power as may be  necessary  to  authorize
additional shares of Common Stock for issuance upon exchange of the Rights.  The
Company  shall not be required to issue  fractions  of shares of Common Stock or
Common Stock Equivalents or to distribute certificates which evidence fractional
shares of Common Stock or Common Stock  Equivalents.  In lieu of such fractional
shares of Common Stock or Common Stock Equivalents, the Company shall pay to the
registered  holders  of the  Rights  Certificates  with  regard  to  which  such
fractional shares of Common Stock or Common Stock Equivalents would otherwise be
issuable an amount in cash equal to the product  derived by multiplying  (x) the
subject  fraction,  by (y) the last sale price of the Company's  Common Stock on
the fifth Trading Day following the public  announcement  of the exchange by the
Company,  or, in case no such sale takes  place on such day,  the average of the
closing bid and asked  prices on such day, in either case on a when issued basis
(taking into


                                      -18-
<PAGE>

account the  exchange),  as reported in the principal  consolidated
transaction  reporting  system with respect to securities  listed or admitted to
trading  on the NYSE  (or,  if the  Company's  Common  Stock is not so listed or
traded,  then as  determined  in the manner  provided  under the  definition  of
"Current  Market Price,"  adjusted to take into account the  exchange).  For the
purposes of this Section 11(a)(iv),  the value of any Common Stock Equivalent on
any date  shall be the same as the  value of the  Common  Stock,  as  determined
pursuant to the previous sentence, on such date.

            (b) If the  Company  shall at any time on or after  the date of this
Agreement  fix a record date for the issuance of rights,  options or warrants to
holders of  Preferred  Stock  entitling  them (for a period  expiring  within 45
calendar  days after such record  date) to subscribe  for or purchase  Preferred
Stock or Equivalent  Shares (or securities  convertible into or exchangeable for
Preferred Stock or Equivalent Shares) at a price per share of Preferred Stock or
Equivalent  Shares (or, in the case of a convertible or  exchangeable  security,
having a conversion or exchange price per share of Preferred Stock or Equivalent
Shares) less than the Current Market Price per share of Preferred  Stock 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 shares
of Preferred  Stock and  Equivalent  Shares (if any)  outstanding on such record
date, plus the number of shares of Preferred Stock or Equivalent  Shares, as the
case may be, which the aggregate exercise,  conversion and/or exchange price for
the total number of shares of Preferred Stock or Equivalent  Shares, as the case
may be, which are obtainable upon exercise,  conversion  and/or exchange of such
rights,  options,  warrants or  convertible  or  exchangeable  securities  would
purchase at such Current Market Price, and the denominator of which shall be the
number of shares of Preferred Stock and Equivalent  Shares (if any)  outstanding
on such record date, plus the number of additional  shares of Preferred Stock or
Equivalent  Shares,  as the case may be,  which may be obtained  upon  exercise,
conversion and/or exchange of such rights,  options,  warrants or convertible or
exchangeable  securities.  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 a majority of the
Board of Directors of the Company,  whose  determination shall be described in a
statement filed with the Rights Agent and shall be final, binding and conclusive
for all purposes. Preferred Stock and Equivalent Shares owned by or held for the
account of the  Company or any  Subsidiary  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 issued following such adjustment,  the
Purchase Price shall be readjusted to be the Purchase Price that would have been
in effect if such record date had not been fixed.

            (c) In case the  Company  shall at any time  after  the date of this
Agreement  fix a record  date for the  making of a  distribution  to  holders of
Preferred  Stock  (including  any such  distribution  made in connection  with a
reclassification  of the Preferred Stock or a  consolidation  or merger in which
the Company is the surviving  corporation)  of securities  (other than Preferred
Stock and rights,  options,  warrants or convertible or exchangeable  securities
referred to in Section 11(b)), cash (other than a regular periodic cash dividend
at an annual  rate not in excess of: (x) 125% of the annual  rate of the regular
cash  dividend  paid on the  Preferred  Stock during the  immediately  preceding
fiscal  year  (or,  if the  Preferred  Stock  was not  outstanding  during  such
preceding fiscal year, then 125% of the annual rate of the regular cash dividend
paid on the Common Stock  during such year),  or (y) in the event that a regular
cash dividend was not paid on the Preferred  Stock (or Common Stock) during such
preceding  fiscal year, 5% of the Current Market Value of the Preferred Stock on
the date such regular cash dividend was first declared),  property, evidences of
indebtedness,  or assets,  the Purchase  Price to be in effect after such record


                                      -19-
<PAGE>

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
Current Market Price per share of Preferred  Stock on such record date, less the
fair  market  value (as  determined  in good faith by a majority of the Board of
Directors of the Company,  whose determination shall be described in a statement
filed with the Rights Agent and shall be final,  binding and  conclusive for all
purposes)  of the  portion of such  securities,  cash,  property,  evidences  of
indebtedness or assets to be so distributed in respect of one share of Preferred
Stock, and the denominator of which shall be such Current Market Price per share
of  Preferred  Stock  on  such  record  date.  Such  adjustments  shall  be made
successively  whenever  such a record date is fixed;  and in the event that such
distribution is not made following such adjustment,  the Purchase Price shall be
readjusted  to be the  Purchase  Price  that  would  have been in effect if such
record date had not been fixed.

            (d) Except as provided  below,  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(d) 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,  to the
nearest one hundred-thousandth of a share of Common Stock, or to the nearest one
hundred-thousandths  of a share of Preferred  Stock.  Notwithstanding  the first
sentence of this Section 11(d), 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 and (ii) the Expiration Date.

            (e) If, as a result of an adjustment  made pursuant to Section 11(a)
or Section  13(a),  the holder of any Right  thereafter  exercised  shall become
entitled to receive any securities of the Company other than shares of Preferred
Stock,  thereafter the Purchase Price and the number of such other securities 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 shares of  Preferred  Stock  contained  in this
Section  11 and the  provisions  of  Sections  7, 9, 10,  12, 13, 14 and 24 with
respect to the shares of  Preferred  Stock shall apply on like terms to any such
other securities.

            (f) 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 shares of Preferred
Stock or other securities,  cash or other property purchasable from time to time
hereunder  upon  exercise of the Rights,  all subject to further  adjustment  as
provided in this Agreement.

            (g) Unless the Company shall have exercised its election as provided
in Section 11(h),  upon each adjustment of the Purchase Price as a result of any
calculation  made  pursuant to Sections  11(a)(i),  11(b) and 11(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 share of Preferred Stock (calculated to the nearest one
hundred-thousandths  of a share of Preferred  Stock) obtained by (i) multiplying
the number of one  one-hundredths  of a share of  Preferred  Stock  covered by a
Right  immediately  prior to  adjustment  pursuant to this Section  11(g) by the
Purchase Price in effect  immediately


                                      -20-
<PAGE>

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.

            (h) The Company may elect, on or after the date of any adjustment of
the Purchase Price or any adjustment to the number of shares of Preferred  Stock
for which a Right may be exercised,  to adjust the number of Rights,  in lieu of
an adjustment in the number of one  one-hundredths of a share of Preferred Stock
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 share  of  Preferred  Stock  for  which  a  Right  was
exercisable  immediately prior to such adjustment.  Each Right outstanding prior
to such  adjustment  of the number of Rights  shall become that number of Rights
(calculated  to the nearest  one  hundred-thousandth)  obtained by dividing  the
Purchase Price in effect  immediately  prior to such  adjustment by the Purchase
Price in effect  immediately  after such  adjustment.  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 Rights  Certificates  have
been  issued,  shall  be  at  least  10  days  after  the  date  of  the  public
announcement.  If Rights  Certificates have been issued, upon each adjustment of
the number of Rights  pursuant  to this  Section  11(h) the  Company  shall,  as
promptly as practicable,  cause to be distributed to holders of record of Rights
Certificates on such record date a new Rights Certificate evidencing, subject to
Section 14, 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
Rights  Certificates  held by such holders prior to the date of  adjustment  and
upon  surrender  thereof (if required by the Company),  new Rights  Certificates
evidencing  all the Rights to which such  holders  shall be entitled  after such
adjustment.  Rights Certificates to be so distributed shall be issued,  executed
and countersigned in the manner provided for in this Agreement (and may bear, at
the option of the Company,  the adjusted Purchase Price) and shall be registered
in the names of the holders of record of Rights  Certificates on the record date
specified in the public announcement.

            (i)  Irrespective  of any adjustment or change in the Purchase Price
or the number or kind of shares  issuable  upon the exercise of the Rights,  the
Rights  Certificates  theretofore and thereafter  issued may continue to express
the Purchase Price per one  one-hundredth  of a share of Preferred Stock and the
number of shares of Preferred  Stock which were  expressed in the initial Rights
Certificates issued hereunder.

            (j) Before taking any action that would cause an adjustment reducing
the Purchase Price below the then par value, if any, of one  one-hundredth  of a
share of Preferred Stock 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 one one-hundredth  shares of such Preferred Stock at such adjusted
Purchase Price.

            (k) In any case in which  this  Section  11  shall  require  that an
adjustment  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  issuance to
the holder of any Right exercised after such record date


                                      -21-
<PAGE>

the shares of  Preferred  Stock and other  securities,  cash or  property of the
Company,  if any,  issuable  upon such  exercise  over and  above the  shares of
Preferred Stock and other securities,  cash or property 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 (fractional or otherwise) or other securities,
cash or property upon the occurrence of the event requiring such adjustment.

            (l) 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 the Board of  Directors  of the  Company in its sole  discretion
shall  determine to be advisable in order that any combination or subdivision of
the Preferred  Stock,  issuance  wholly for cash of any Preferred  Stock at less
than the Current Market Price per share of Preferred Stock,  issuance wholly for
cash of Preferred Stock or securities  which by their terms are convertible into
or exchangeable or exercisable for Preferred Stock,  stock dividends or issuance
of rights, options or warrants referred to in this Section 11, hereafter made by
the  Company  to holders of its  Preferred  Stock,  shall not be taxable to such
stockholders.

            (m) The Company  covenants and agrees that it shall not, at any time
after the Distribution  Date, (i) consolidate  with, (ii) merge with or into, or
(iii) directly or indirectly sell, lease or otherwise transfer or dispose of (in
one transaction or a series of related transactions) property, assets or earning
power aggregating more than 50% of the property,  assets or earning power of the
Company and its Subsidiaries taken as a whole, to any other Person if (A) at the
time of or immediately after such consolidation,  merger, sale, lease,  transfer
or disposition there are any rights,  warrants,  securities or other instruments
outstanding  or  agreements  in effect  which  would  substantially  diminish or
otherwise  eliminate  the  benefits  intended to be afforded by the Rights;  (B)
prior to,  simultaneously with or immediately after such consolidation,  merger,
sale, lease, transfer or disposition the stockholders (or equity holders) 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 or Associates;  or (C) the form or
nature of  organization  of the  Principal  Party  would  preclude  or limit the
exercisability  of the  Rights.  The  Company  shall  not  consummate  any  such
consolidation, merger, sale, lease, transfer or disposition 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
11(m).

            (n)  The  Company   covenants  and  agrees  that,  after  the  Stock
Acquisition Date, it will not, except as permitted by Section  11(a)(iv),  26 or
29(b),  take (or permit any  Subsidiary  to take) any action if at the time such
action is taken it is reasonably  foreseeable that such action will, directly or
indirectly, diminish or otherwise eliminate the benefits intended to be afforded
by the Rights.

            (o) Anything in this Agreement to the contrary  notwithstanding,  if
the Company shall at any time prior to the Distribution  Date (i) pay a dividend
or make a  distribution  on the  outstanding  shares of Common Stock  payable in
shares of Common  Stock,  (ii)  subdivide  the  outstanding  Common Stock into a
larger  number of shares,  (iii) combine (by a


                                      -22-
<PAGE>

reverse stock split or otherwise)  the  outstanding  Common Stock into a smaller
number of shares,  or (iv) issue any  securities  in a  reclassification  of the
Common  Stock  (including  any  such   reclassification  in  connection  with  a
consolidation or merger in which the Company is the surviving corporation), then
the  number  of Rights  associated  with  each  share of  Common  Stock or (in a
reclassification)  each  security  then  outstanding,  or  issued  or  delivered
thereafter but prior to the Distribution Date, and the Purchase Price under, and
the number of one  one-hundredths  of a share of  Preferred  Stock  issuable  in
respect of, the Rights,  shall be  proportionately  adjusted,  so that following
such  event  one  Right  (with  the  Purchase   Price  and  the  number  of  one
one-hundredths   of  a  share  of  Preferred  Stock   proportionately   adjusted
thereunder)  shall  thereafter be associated  with each share of Common Stock or
(in a reclassification)  each security then outstanding,  or issued or delivered
thereafter  but prior to the  Distribution  Date.  For  example,  if the Company
effects a two-for-one  stock split of the Common Stock at a time when each Right
(if  it  becomes   exercisable)   would  entitle  the  holder  to  purchase  one
one-hundredth  of a share of Preferred  Stock for a Purchase Price of $"Z", then
following  such stock split each previous  Right would be split into two current
Rights and thereafter each such current Right, upon becoming exercisable,  would
(subject to further adjustment) entitle the holder to purchase one one-hundredth
of a share of Preferred Stock at a Purchase Price of 1/2 x $"Z".

            Section 12. Certification of Adjustments.  Whenever an adjustment is
made as provided in Section 11 or 13, the Company  shall (a) promptly  prepare a
certificate  setting forth such  adjustment  and a brief  statement of the facts
accounting for such adjustment, (b) promptly file with the Rights Agent and with
each transfer agent for the Preferred Stock a copy of such certificate,  and (c)
mail or cause the Rights Agent to mail a brief summary thereof to each holder of
a Rights  Certificate (or, if no Rights  Certificates  have been issued, to each
holder of a certificate  representing shares of Common Stock) in accordance with
Section 25.  Notwithstanding the foregoing sentence,  the failure of the Company
to give such notice  shall not affect the  validity of or the force or effect of
or the  requirement for such  adjustment.  Any adjustment to be made pursuant to
Section 11 or 13 shall be  effective  as of the date of the event giving rise to
such adjustment.

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

            (a) A "Business  Combination"  shall be deemed to occur in the event
that, on or following a Triggering  Event,  (i) the Company  shall,  directly or
indirectly,  consolidate  with, or merge with and into,  any other Person (other
than a Subsidiary  of the Company in a  transaction  that  complies with Section
11(m) and  Section  11(n)) in a  transaction  in which  the  Company  is not the
continuing,  resulting or surviving corporation of such merger or consolidation;
(ii) any Person (other than a Subsidiary  of the Company in a  transaction  that
complies with Section 11(m) and Section  11(n)) shall,  directly or  indirectly,
consolidate  with the Company,  or shall merge with and into the  Company,  in a
transaction  in which the  Company is the  continuing,  resulting  or  surviving
corporation of such merger or consolidation  and, in connection with such merger
or consolidation,  all or part of the Common Stock shall be changed  (including,
without  limitation,  any  conversion  into or exchange  for  securities  of the
Company or of any other Person,  cash or


                                      -23-
<PAGE>

any other property);  (iii) the Company shall, directly or indirectly,  effect a
share  exchange  in which  all or part of the  Common  Stock  shall  be  changed
(including,  without limitation,  any conversion into or exchange for securities
of any other Person,  cash or any other  property);  or (iv) the Company  shall,
directly or indirectly,  sell,  lease,  exchange,  mortgage,  pledge (other than
pledges  in the  ordinary  course  of the  Company's  financing  activities)  or
otherwise  transfer  or  dispose  of (or one or more of its  Subsidiaries  shall
directly or  indirectly  sell,  lease,  exchange,  mortgage,  pledge (other than
pledges  in the  ordinary  course  of the  Company's  financing  activities)  or
otherwise  transfer or dispose  of), in one  transaction  or a series of related
transactions, property, assets or earning power aggregating more than 50% of the
property,  assets or earning power of the Company and its Subsidiaries (taken as
a whole) to any other Person (other than the Company or any of its  Subsidiaries
in one or more  transactions each and all of which comply with Section 11(m) and
Section 11(n)).

            In the event of a Business  Combination,  proper  provision shall be
made so that each  holder  of a Right  (except  as  otherwise  provided  in this
Agreement) shall thereafter have the right to receive, upon the exercise thereof
at a price equal to the Purchase Price immediately prior to the first occurrence
of a Triggering Event multiplied by the number of one  one-hundredths of a share
of Preferred  Stock for which a Right was exercisable  immediately  prior to the
first  occurrence of a Triggering Event (without giving effect to the Triggering
Event) in accordance with the terms of this Agreement,  such number of shares of
Common Stock of the Principal  Party as shall be equal to the result obtained by
(x) multiplying the Purchase Price  immediately prior to the first occurrence of
a Triggering Event by the number of one  one-hundredths  of a share of Preferred
Stock  for  which  a  Right  was  exercisable  immediately  prior  to the  first
occurrence  of a  Triggering  Event  (without  giving  effect to the  Triggering
Event),  and (y) dividing  that  product by 50% of the Current  Market Price per
share of the  Common  Stock of such  Principal  Party  immediately  prior to the
consummation  of such  Business  Combination.  All shares of Common Stock of any
Person for which any Right may be  exercised  after  consummation  of a Business
Combination  as provided in this Section 13(a) shall,  when issued upon exercise
thereof in accordance  with this Agreement,  be duly and validly  authorized and
issued,  fully paid,  nonassessable,  freely tradeable,  not subject to liens or
encumbrances,  and free of  preemptive  rights,  rights of first  refusal or any
other  restrictions  or limitations on the transfer or ownership  thereof of any
kind or nature whatsoever.

            (b)  After  consummation  of  any  Business  Combination,   (i)  the
Principal  Party  shall be  liable  for,  and  shall  assume,  by virtue of such
Business  Combination  and without the  necessity  of any further  act,  all the
obligations and duties of the Company pursuant to this Agreement,  (ii) the term
"Company" as used in this Agreement shall  thereafter be deemed to refer to such
Principal Party, and (iii) such Principal Party shall take all steps (including,
but not  limited to, the  reservation  of a  sufficient  number of shares of its
Common Stock in  accordance  with Section 9) in  connection  with such  Business
Combination  as is necessary  to ensure that the  provisions  of this  Agreement
shall thereafter be applicable, as nearly equivalent as practicable, in relation
to the shares of its Common Stock  thereafter  deliverable  upon the exercise of
the Rights.

            (c) The Company shall not consummate any Business Combination unless
prior  thereto  (i) the  Principal  Party  shall  have a  sufficient  number  of
authorized shares of its Common Stock which have not been issued or reserved for
issuance (other than shares reserved for issuance  pursuant to this Agreement to
the  holders  of  Rights)  to  permit  the  exercise  in full of the  Rights  in
accordance with this Section 13; (ii) the Company and such Principal Party shall
have  executed  and  delivered  to the  Rights  Agent a  supplemental  agreement
providing for the fulfillment of the Principal Party's obligations and the terms
as set forth in paragraphs (a) and (b)

                                      -24-
<PAGE>
of this Section 13 and further  providing  that,  as soon as  practicable  on or
after the date of such Business  Combination,  the Principal  Party,  at its own
expense,  shall (A) prepare and file, if necessary,  a registration statement on
an appropriate  form under the Securities Act with respect to the Rights and the
securities  purchasable upon exercise of the Rights; (B) use its reasonable best
efforts to cause such  registration  statement  to become  effective  as soon as
practicable  after such filing and remain  effective  (with a prospectus  at all
times meeting the requirements of the Securities Act) until the Expiration Date;
(C) deliver to holders of the Rights  historical  financial  statements  for the
Principal Party and each of its Affiliates which comply in all respects with the
requirements  for  registration  on Form 10 (or any  successor  form)  under the
Exchange  Act;  (D) use its  reasonable  best efforts to qualify or register the
Rights and the  securities  purchasable  upon  exercise of the Rights  under the
state securities or "blue sky" laws of such jurisdictions as may be necessary or
appropriate;  (E) use its  reasonable  best  efforts  to list the Rights and the
securities  purchasable  upon exercise of the Rights on a United States national
securities  exchange;  and (F) obtain  waivers of any rights of first refusal or
preemptive  rights in respect of the Common Stock of the Principal Party subject
to purchase  upon  exercise  of  outstanding  Rights;  (iii) the Company and the
Principal  Party  shall  have  furnished  to the  Rights  Agent  an  opinion  of
independent  counsel stating that such supplemental  agreement is a legal, valid
and binding agreement of the Principal Party  enforceable  against the Principal
Party in accordance with its terms; and (iv) the Company and the Principal Party
shall have filed with the Rights Agent a certificate of a nationally  recognized
firm of  independent  accountants  setting  forth the number of shares of Common
Stock of such  issuer  which may be  purchased  upon the  exercise of each Right
after the consummation of such Business Combination.

            (d) The  provisions  of this  Section  13 shall  similarly  apply to
successive Business  Combinations.  In the event a Business Combination shall be
consummated at any time after the occurrence of a Triggering  Event,  the Rights
which have not theretofore  been exercised  shall  thereafter be exercisable for
the  consideration  and in the manner  described in Section  13(a).  Following a
Business Combination, the provisions of Section 11(a)(ii) shall be of no effect.

            (e)  Notwithstanding  any other  provision of this  Agreement to the
contrary, no adjustment to the number of shares of Preferred Stock (or fractions
of a share) or other  securities,  cash or other  property  for which a Right is
exercisable or the number of Rights outstanding or associated with each share of
Common Stock or any similar or other adjustment shall be made or be effective if
such  adjustment  would have the effect of reducing or limiting the benefits the
holders of the Rights would have had absent such adjustment,  including, without
limitation,  the  benefits  under  Sections 11 and 13,  unless the terms of this
Agreement are amended so as to preserve such benefits.

            (f) The  Company  covenants  and agrees that it shall not effect any
Business  Combination  if at the time of, or  immediately  after  such  Business
Combination,  there  are any  rights,  options,  warrants  or other  instruments
outstanding which would diminish or otherwise eliminate the benefits intended to
be afforded by the Rights.

            (g) Without limiting the generality of this Section 13, in the event
the nature of the  organization  of any Principal  Party shall preclude or limit
the  acquisition  of Common Stock of such  Principal  Party upon exercise of the
Rights as required by Section  13(a) as a result of a Business  Combination,  it
shall be a condition to such  Business  Combination  that such


                                      -25-
<PAGE>

Principal  Party  shall  take  such  steps  (including,  but not  limited  to, a
reorganization)  as may be necessary to ensure that the benefits  intended to be
derived under this Section 13 upon the exercise of the Rights are assured to the
holders thereof.

            (h) In addition  to, and without  limiting,  any other  provision of
this  Section  13,  in case  the  Principal  Party  which  is to be a party to a
transaction  referred  to in  this  Section  13  has  provision  in  any  of its
authorized securities or in its certificate of incorporation or by-laws or other
instrument  governing  its  corporate  affairs (or  equivalent  documents  for a
non-corporate Person), which provision would have the effect of (i) causing such
Principal  Party to issue  (other  than to  holders of Rights  pursuant  to this
Section 13), in connection  with, or as a consequence of, the  consummation of a
transaction referred to in this Section 13, Common Stock of such Principal Party
at less than the then Current  Market Price per share or securities  exercisable
for, or convertible into, Common Stock of such Principal Party at less than such
then Current  Market Price,  or (ii) providing for any special  payment,  tax or
similar  provisions in connection  with the issuance of the Common Stock of such
Principal  Party  pursuant to the  provisions  of this Section 13, then, in such
event,  the Company  hereby  agrees with each holder of Rights that it shall not
consummate  any such  transaction  unless  prior  thereto  the  Company and such
Principal  Party  shall  have  executed  and  delivered  to the  Rights  Agent a
supplemental  agreement  providing  that  the  provision  in  question  of  such
Principal  Party  shall  have been  cancelled,  waived or  amended,  or that the
authorized  securities shall be redeemed,  so that the applicable provision will
have no effect in connection  with, or as a consequence of, the  consummation of
the proposed transaction.

            Section 14.  Fractional Rights and Fractional Shares.

            (a) The Company shall not be required to issue fractional  Rights or
to distribute Rights  Certificates which evidence  fractional Rights. In lieu of
such  fractional  Rights,  the Company  may at its option pay to the  registered
holders of the Rights  Certificates with respect 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 a Right
for the  Trading  Day  immediately  prior to the date on which  such  fractional
Rights otherwise would have been issuable. The closing price for any Trading Day
shall be the last sale price, regular way, on such day, or, in case no such sale
takes  place on such day,  the  average  of the  closing  bid and asked  prices,
regular  way,  on  such  day,  in  either  case  as  reported  in the  principal
consolidated  transaction  reporting system with respect to securities listed or
admitted  to trading on the NYSE or, if the Rights are not listed or admitted to
trading on the NYSE,  as  reported  in the  principal  consolidated  transaction
reporting  system with  respect to  securities  listed on the  principal  United
States national  securities  exchange on which the Rights are listed or admitted
to trading or, if the Rights are not listed or admitted to trading on any United
States national securities exchange,  the last quoted sale price on such day or,
if not so  quoted,  the  average  of the high bid and low  asked  prices  in the
over-the-counter  market on such day, as reported by Nasdaq or such other system
then in use or, if on such day the Rights are not quoted by any such system, the
average  of the  closing  bid and  asked  prices on such day as  furnished  by a
professional  market maker making a market in the Rights  selected by a majority
of the  Board of  Directors  of the  Company  (which  selection  shall be final,
binding and conclusive for all purposes). If on such day no such market maker is
making a market in the Rights,  the current  market  value of the Rights on such
day shall be determined in good faith by a majority of the Board of Directors of
the Company,  whose


                                      -26-
<PAGE>

determination  shall be described in a statement filed with the Rights Agent and
shall be final, binding and conclusive for all purposes.

            (b) The Company  shall not be required to issue  fractions of shares
of Preferred  Stock (other than  fractions  which are integral  multiples of one
one-hundredth  of a share of Preferred  Stock) upon exercise of the Rights or to
distribute  certificates  which evidence  fractional  shares of Preferred  Stock
(other than fractions  which are integral  multiples of one  one-hundredth  of a
share of Preferred  Stock).  Fractions of shares of Preferred  Stock may, at the
election of the  Company,  be evidenced by  depositary  receipts  pursuant to an
appropriate  agreement  between  the Company  and a  depositary  selected by it,
provided that such agreement  shall provide that the holders of such  depositary
receipts shall have all the rights, privileges and preferences to which they are
entitled as  beneficial  owners of the  Preferred  Stock.  In lieu of fractional
shares of Preferred Stock that are not integral  multiples of one  one-hundredth
of a share of Preferred  Stock, the Company may at its option (i) issue scrip or
warrants  in  registered   form  (either   represented   by  a  certificate   or
uncertificated)  or in bearer form  (represented  by a certificate)  which shall
entitle the holder to receive a full one  one-hundredth  of a share of Preferred
Stock  upon the  surrender  of such  scrip or  warrants  aggregating  a full one
one-hundredth  of a share of  Preferred  Stock,  or (ii)  pay to the  registered
holders  of  Rights  Certificates  at the  time  such  Rights  Certificates  are
exercised  as  provided  in this  Agreement  an amount in cash equal to the same
fraction of the current market value of a share of Preferred Stock. For purposes
of this Section 14(b),  the current  market value of a share of Preferred  Stock
shall be the closing price of a share of Preferred Stock (as determined pursuant
to the second sentence of the definition of "Current Market Price" in Section 1)
for the Trading Day immediately prior to the date of such exercise.

            (c) The Company  shall not be required to issue  fractions of shares
of Common Stock or Common Stock Equivalents or to distribute  certificates which
evidence fractional shares of Common Stock or Common Stock Equivalents.  In lieu
of such  fractional  shares of Common  Stock or Common  Stock  Equivalents,  the
Company  shall pay to the  registered  holders of the Rights  Certificates  with
regard  to  which  such  fractional  shares  of  Common  Stock or  Common  Stock
Equivalents  would  otherwise be issuable an amount in cash equal to the product
derived by multiplying (x) the subject fraction,  by (y) Current Market Price of
the Company's Common Stock.

            (d) The holder of a Right by his acceptance thereof expressly waives
any right to  receive  any  fractional  Rights  or any  fractional  shares  upon
exercise of a Right (except as otherwise provided in this Agreement).

            Section 15.  Rights of Action.  Except as  otherwise  provided,  all
rights of action in  respect  of this  Agreement  are  vested in the  respective
registered  holders of the Rights  Certificates  (and, prior to the Distribution
Date, any  registered  holders of associated  Common Stock);  and any registered
holder of any Rights  Certificate (or, prior to the Distribution Date, any share
of associated  Common Stock),  without the consent of the Rights Agent or of the
holder of any other  Right,  may,  on his own  behalf  and for his own  benefit,
enforce,  and may institute and maintain any suit, action or proceeding  against
the Company or any Principal  Party to enforce,  or otherwise act in respect of,
his rights  pursuant to this  Agreement.  Without  limiting the foregoing or any
remedies  available to the holders of Rights,  it is  specifically  acknowledged
that the


                                      -27-
<PAGE>

holders  of Rights  would not have an  adequate  remedy at law for any breach of
this  Agreement  and will be  entitled,  without  posting any bond,  to specific
performance of the obligations  under, and injunctive  relief against any actual
or  threatened  violation  of the  obligations  of any Person  subject  to, this
Agreement.

            Section 16.  Agreement  of Rights  Holders  Concerning  Transfer and
Ownership of Rights.  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 Common Stock;

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

            (c) the Company  and the Rights  Agent may deem and treat the Person
in whose name a Rights  Certificate  (or,  prior to the  Distribution  Date, the
associated Common Stock certificate) is registered as the absolute owner thereof
and of the Rights evidenced thereby  (notwithstanding any notations of ownership
or writing on the Rights  Certificate or the associated Common Stock certificate
made by anyone other than the Company,  the transfer  agent for the Common Stock
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; and

            (d)  notwithstanding  anything in this  Agreement  to the  contrary,
neither the Company nor the Rights Agent shall have any  liability to any holder
of a Right or other  Person as a result of its  inability  to perform any of its
obligations  under this  Agreement  by reason of any  preliminary  or  permanent
injunction  or other  order,  decree  or ruling  issued by a court of  competent
jurisdiction  or by a  governmental,  regulatory  or  administrative  agency  or
commission,  or any statute,  rule, regulation or executive order promulgated or
enacted by any  governmental  authority,  prohibiting  or otherwise  restraining
performance  of such  obligation;  provided,  however,  the Company must use its
reasonable  best  efforts  to have any such  order,  decree or ruling  lifted or
otherwise overturned as soon as possible.

            Section 17. Rights Holder Not Deemed a  Stockholder.  No holder,  as
such,  of any  Rights  Certificate  shall  be  entitled  to vote  or to  receive
dividends  or  distributions  or shall be deemed for any  purpose  the holder of
Preferred Stock or any other securities, cash or other property which may at any
time be issuable on the exercise of the Rights  represented  thereby,  nor shall
anything  contained in this Agreement or in any Rights  Certificate be construed
to confer upon the holder of any Rights Certificate,  as such, any of the rights
of a stockholder of the Company, including, without limitation, any right (i) to
vote for the election of directors or upon any matter  submitted to stockholders
at any  meeting  thereof,  (ii) to give or  withhold  consent  to any  corporate
action,  (iii)  to  receive  notice  of  meetings  or  other  actions  affecting
stockholders  (except as provided  in Section  24),  (iv) to receive  dividends,
distributions  or  subscription  rights,  or (v) to  institute,  as a holder  of
Preferred  Stock  or  other  securities  issuable  on  exercise  of  the  Rights
represented by any Rights  Certificate,  any derivative  action on behalf of the
Company,  or


                                      -28-
<PAGE>

otherwise,  until and only to the extent that the Right or Rights  evidenced  by
such  Rights  Certificate  shall  have been  exercised  in  accordance  with the
provisions of this Agreement.

            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,  willful  misconduct or breach of this  Agreement 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. This indemnification shall survive 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 Rights Certificate or
certificate for Preferred  Stock or Common Stock 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  reasonably  believed  by it to be genuine  and to be signed,
executed and, when necessary,  verified or acknowledged, by the proper Person or
Persons, or otherwise upon the advice of counsel as set forth in Section 20.

            Section  19.  Merger  or  Consolidation  or Change of Name of Rights
Agent.  Any  corporation  or other  entity  into which the  Rights  Agent or any
successor  Rights Agent may be merged or with which it may be  consolidated,  or
any corporation or other entity  resulting from any merger or  consolidation  to
which the Rights Agent or any  successor  Rights Agent shall be a party,  or any
corporation or other entity  succeeding to the corporate trust or stock transfer
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  document  or any  further  act on the part of any of the  parties
hereto,  provided  that such  corporation  or other entity would be eligible for
appointment  as a successor  Rights Agent under  Section 21. In case at the time
such  successor  Rights  Agent  shall  succeed  to the  agency  created  by this
Agreement any of the Rights  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 Rights  Certificate so countersigned;
and in case at that  time any of the  Rights  Certificates  shall  not have been
countersigned,   any  successor   Rights  Agent  may  countersign   such  Rights
Certificate either in the name of the predecessor Rights Agent or in the name of
the successor Rights Agent; and in all such cases such Rights Certificates shall
have the full force provided in the Rights 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 Rights  Certificates  shall have been  countersigned
but not  delivered,  the Rights Agent may adopt the  countersignature  under its
prior name and deliver Rights Certificates so countersigned; and in case at that
time any of the  Rights  Certificates  shall  not have been  countersigned,  the
Rights Agent may countersign such Rights  Certificates  either in its prior name


                                      -29-
<PAGE>

or in its changed  name;  and in all such cases such Rights  Certificates  shall
have the full force provided in the Rights Certificates and in this Agreement.

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

            (a) The Rights  Agent may  consult  with legal  counsel  (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 to be taken 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
(including,  without  limitation,  the identity of any  Acquiring  Person or any
Affiliate or Associate of an Acquiring  Person or the  determination  of Current
Market  Price)  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  specifically  prescribed in this Agreement) may be deemed to
be conclusively  proved and established by a certificate  signed by the Chairman
of the Board, the President,  the Chief Executive  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 omitted by it in good faith  under this  Agreement  in reliance
upon such certificate.

            (c) The Rights  Agent shall be liable  hereunder  only for the gross
negligence,  bad faith,  willful misconduct or breach of this Agreement by it or
its attorneys or agents.

            (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 Rights
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 of this
Agreement (except the due execution and delivery of this Agreement by the Rights
Agent) or in respect of the  validity  or  execution  of any Rights  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 Rights Certificate;  nor shall it be responsible for any change in the
transferability  or  exercisability of the Rights or any change or adjustment in
the terms of the  Rights  (including  the  manner,  method  or  amount  thereof)
provided for in Section 3, 11, 13 or 23 or any other provision of this Agreement
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 Rights
Certificates  after actual notice of any change or adjustment is required);  nor
shall it by any act hereunder be deemed to make any  representation  or warranty
as to the authorization or reservation of any shares of Preferred Stock,  Common
Stock or other  securities to be issued pursuant to this Agreement or any Rights
Certificate  or as to whether any shares of  Preferred


                                      -30-
<PAGE>

Stock, Common Stock or other securities 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  performance  by the Rights
Agent of its duties and obligations under this Agreement.

            (g) The Rights  Agent is hereby  authorized  and  directed to accept
instructions  with respect to the  performance of its duties  hereunder from the
Chairman of the Board,  the Chief  Executive  Officer,  the President,  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 omitted to be taken by it in good faith in
accordance  with  instructions  of any such  officer  or for any delay in acting
while  waiting for such  instructions.  When  applying  to any such  officer for
instructions,  the Rights Agent may set forth in writing (i) any proposed action
or omission of the Rights Agent with respect to its duties or obligations  under
this  Agreement  and (ii) the date on or after which the Rights  Agent  proposes
such  action  will be taken or  omitted.  Such date shall not be less than three
Business Days after any such officer  receives such application for instructions
from the Rights Agent. Unless the Rights Agent has received written instructions
from the Company  (including  any such  officer)  with respect to such  proposed
action or omission prior to such date (or, if longer,  in the case of a proposed
action to be taken, prior to the Rights Agent actually taking such action),  the
Rights Agent shall not be liable for the actions or omissions  set forth in such
application,  provided that such action or omission does not violate any express
provision of this Agreement.

            (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 the Rights Agent were not
serving as such under this  Agreement.  Nothing in this Agreement shall preclude
the Rights  Agent from acting in any other  capacity  for the Company or for any
other Person.

            (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 such attorney or
agent, provided that the Rights Agent exercised reasonable care in the selection
and continued employment of such attorney or agent.

            (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
hereunder 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 the Rights Agent.


                                      -31-
<PAGE>

            (k) If, with respect to any Rights  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, either has not
been  completed  or  indicates  an  affirmative  response  to  clause 1 and/or 2
thereof, the Rights Agent shall not take any further action with respect to such
requested exercise or 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 of the Common Stock or Preferred Stock by registered or certified
mail, and to the holders of the Rights  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 of the Common Stock or Preferred  Stock
by registered or certified  mail, and to the holders of the Rights  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.  Notwithstanding any other provision of this Agreement,  in no
event shall the  resignation  or removal of a Rights Agent be effective  until a
successor  Rights  Agent  shall  have  been  appointed  and have  accepted  such
appointment.  If the Company shall fail to make such appointment within a period
of 30 days after such  removal or after it has been  notified in writing of such
resignation or incapacity by the resigning or  incapacitated  Rights Agent or by
any holder of a Rights  Certificate  (who shall,  with such  notice,  submit his
Rights  Certificate  for inspection by the Company),  then the incumbent  Rights
Agent or the registered holder of any Rights  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 (i) a corporation  or other entity  organized and doing  business under
the laws of the United  States or any state of the United States so long as such
Person is authorized to conduct a corporate trust or banking  business under the
laws of such state and is in good standing,  which is authorized under such laws
to exercise  corporate  trust powers or stock transfer  powers and is subject to
supervision or  examination  by federal or state  authority and which has at the
time of its appointment as Rights Agent a combined capital surplus and undivided
profits  aggregating of at least  $100,000,000,  according to its last published
statement of condition or (ii) an Affiliate of a Person described in clause (i).
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 such 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 of the Common Stock or
Preferred  Stock and mail a notice thereof in writing to the registered  holders
of the Rights Certificates.  Neither the failure to give any notice provided for
in this Section 21, however,  nor any defect therein,  shall 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 Rights Certificates. Notwithstanding any
of the  provisions  of  this  Agreement  or of the  Rights  Certificates  to the
contrary,  the  Company  may,  at its  option,  issue  new  Rights  Certificates
evidencing new Rights in such form as may be approved


                                      -32-
<PAGE>

by a majority of the Board of Directors of the Company to reflect any adjustment
or change  in the  Purchase  Price per share and the  number or kind or class of
securities,  cash or other property  purchasable  under the Rights  Certificates
made in  accordance  with the  provisions  of this  Agreement.  In addition,  in
connection with the issuance or sale of Common Stock following the  Distribution
Date and prior to the  Redemption  Date,  the Company may with respect to Common
Stock so issued or sold  pursuant  to (i) the  exercise of stock  options,  (ii)
under any employee plan or arrangement,  (iii) upon the exercise,  conversion or
exchange  of  securities  notes or  debentures  issued by the  Company or (iv) a
contractual  obligation  of the  Company,  in each  case  existing  prior to the
Distribution Date, issue Rights Certificates representing the appropriate number
of Rights in connection with such issuance or sale.

            Section 23.  Redemption

            (a) The Board of Directors of the Company may, at its option, at any
time  prior  to the  earlier  of (i) the  Stock  Acquisition  Date  and (ii) the
Expiration Date, redeem all but not less than all of the then-outstanding Rights
at a redemption price of $.01 per Right (the "Redemption  Price")  appropriately
adjusted  to reflect any stock  split,  stock  dividend  or similar  transaction
occurring after the date of this Agreement.  The Company may, at its option, pay
the Redemption Price in cash,  shares  (including  fractional  shares) of Common
Stock  (based on the  Current  Market  Price of the Common  Stock at the time of
redemption) or any other form of consideration  deemed  appropriate by the Board
of Directors.

            (b)  At  the  time  and  date  of  effectiveness  set  forth  in any
resolution of the Board of Directors of the Company  ordering the  redemption of
the Rights (the "Redemption  Date"),  without any further action and without any
further  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; provided,  however, that such resolution of the Board of Directors of the
Company may be revoked, rescinded or otherwise modified at any time prior to the
time and date of effectiveness set forth in such resolution,  in which event the
right to exercise  will not  terminate at the time and date  originally  set for
such  termination  by  the  Board  of  Directors  of the  Company.  As  soon  as
practicable  after the action of the Board of Directors of the Company  ordering
the redemption of the Rights,  the Company shall give notice of such  redemption
to the Rights Agent and to the holders of the then-outstanding Rights by mailing
such notice to all such holders at their last  addresses as they appear upon the
registry  books  of the  Rights  Agent  or,  prior  to the  issuance  of  Rights
Certificates,  on the registry books of the transfer agent for the Common Stock.
Any notice  which is mailed in the manner  provided in this  Agreement  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. In any case, failure to give such notice by mail, or any defect in
the notice,  to any particular holder of Rights shall not affect the sufficiency
of the notice to other holders of Rights. In the case of a redemption  permitted
under this  Section 23, 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
issuance of the Rights Certificates, on the registry books of the transfer agent
for the Common Stock, and upon such action, all outstanding Rights  Certificates
shall be null and void without any further  action by the  Company.  Neither the
Company nor any of its Affiliates or


                                      -33-
<PAGE>

Associates  may redeem,  acquire or purchase for value any Rights at any time in
any manner  other than as  specifically  set forth in this  Section 23 and other
than in  connection  with the  purchase  of shares of Common  Stock prior to the
earlier of the Distribution Date and the Expiration Date.

            Section 24.  Notice of Certain  Events.  In case the Company,  on or
after the  Distribution  Date,  shall propose to (a) pay any dividend payable in
stock of any class to the  holders of its  Preferred  Stock or to make any other
distribution  to the  holders  of its  Preferred  Stock  (other  than a  regular
periodic  regular cash  dividend at an annual rate not in excess of: (x) 125% of
the annual rate of the cash  dividend  paid on the  Preferred  Stock  during the
immediately preceding fiscal year, or if the Preferred Stock was not outstanding
during such preceding  fiscal year,  then 125% of the annual rate of the regular
cash  dividend  paid on the Common Stock  during such year,  or (y) in the event
that a regular  cash  dividend  was not paid on the  Preferred  Stock (or Common
Stock) during such preceding  fiscal year, 5% of the Current Market Value of the
Preferred Stock on the date such regular cash dividend was first  declared);  or
(b) offer to the holders of its Preferred  Stock rights,  options or warrants to
subscribe for or to purchase any additional  shares of Preferred Stock or shares
of stock of any class or any other securities,  rights or options; or (c) effect
any  reclassification  of the  Preferred  Stock  (other than a  reclassification
involving  only the  subdivision  of  outstanding  shares of Preferred  Stock, a
change in the par value of such Preferred Stock or a change from par value to no
par value);  or (d) directly or indirectly  effect any  consolidation  or merger
into or  with,  or  effect  any  sale,  lease,  exchange  or other  transfer  or
disposition  (or to permit one or more of its  Subsidiaries  to effect any sale,
lease,  exchange or other  transfer or  disposition),  in one  transaction  or a
series of  related  transactions,  of more than 50% of the  property,  assets or
earning  power of the  Company and its  Subsidiaries  (taken as a whole) to, any
other Person;  or (e) effect the  liquidation,  dissolution or winding up of the
Company,  then,  in each such case,  the Company  shall give to each holder of a
Right,  in accordance with Section 25, a notice of such proposed  action,  which
shall  specify  any  record  date  for  the  purposes  of such  stock  dividend,
distribution   or  rights,   or  the  date  on  which   such   reclassification,
consolidation,   merger,   sale,   lease,   exchange,   transfer,   disposition,
liquidation,  dissolution,  or winding  up is to take place and if such  holders
will or may  participate  therein,  the  date of  participation  therein  by the
holders of Common Stock and/or Preferred Stock, if any such date is to be fixed,
and such  notice  shall be so given in the case of any action  covered by clause
(a) or (b)  above at least 20 days  prior  to the  record  date for  determining
holders of the Preferred  Stock for purposes of such action,  and in the case of
any such other action,  at least 20 days prior to the date of the taking of such
proposed action or the date of participation  therein, if any, by the holders of
Preferred Stock, whichever shall be the earlier.

            In case any Triggering  Event or Business  Combination  shall occur,
then, in any such case, the Company shall as soon as practicable thereafter give
to each holder of a Rights Certificate, in accordance with Section 25, notice of
the occurrence of such  Triggering  Event or Business  Combination,  which shall
specify the Triggering  Event or Business  Combination and include a description
of the  consequences of such event to holders of Rights under Section  11(a)(ii)
or 13.

            The failure to give  notice as  required  by this  Section 24 or any
defect  therein shall not affect the legality or validity of the action taken by
the Company or the vote upon any such action.


                                      -34-
<PAGE>

            Section 25. Notices. Notices or demands authorized by this Agreement
to be  given  or  made  by the  Rights  Agent  or by the  holder  of any  Rights
Certificate to or on the Company shall be sufficiently  given or made if sent by
first-class mail, postage prepaid,  addressed (until another address (or another
person's attention) is filed in writing with the Rights Agent) as follows:

                  ATMI, Inc.
                  7 Commerce Drive
                  Danbury, Connecticut  06810
                  Attention: General Counsel

Subject to the provisions of Section 21, any notice or demand authorized by this
Agreement  to be given or made by the  Company  or by the  holder of any  Rights
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 (or
another person's attention) is filed in writing with the Company) as follows:

                  Fleet National Bank
                  c/o EquiServe Limited Partnership
                  150 Royall Street
                  Canton, MA  02021
                  Attention: Client Administration

Notices  or  demands  authorized  by this  Agreement  to be given or made by the
Company or the Rights Agent to or on the holder of any Rights  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 (or, if no Rights Certificates have been issued, if sent by
first-class  mail,  postage  prepaid,  addressed to the holder of a  certificate
representing  shares of Common  Stock at the  address of such holder as shown on
the Company's Common Stock registry books).

            Section 26.  Amendments  and  Supplements.  This Agreement may not
be amended or  supplemented  except as permitted in Section  26(a) or 26(b) or
as contemplated by Section 11(a)(iii).

            (a) At any time prior to the Stock  Acquisition  Date, a majority of
the Board of Directors  of the Company  may,  and the Rights Agent shall,  if so
directed,  amend or  supplement  any  provision  of this  Agreement  without the
approval of any holders of Rights.

            (b) From and after the Stock  Acquisition  Date,  a majority  of the
Board of  Directors  of the  Company  may,  and the Rights  Agent  shall,  if so
directed, amend or supplement this Agreement without the approval of any holders
of Rights Certificates (i) to cure any ambiguity,  (ii) to correct or supplement
any provision contained in this Agreement which may be defective or inconsistent
with any other provision of this Agreement, or (iii) to change or supplement the
provisions  hereunder  in any manner  which the  Company may deem  necessary  or
desirable and which shall not  adversely  affect the interests of the holders of
Rights Certificates (other than an Acquiring Person or an Affiliate or Associate
of an Acquiring Person).


                                      -35-
<PAGE>

            (c)  Immediately  upon the  action  of a  majority  of the  Board of
Directors providing for any amendment or supplement pursuant to this Section 26,
and without any further action and without notice,  such amendment or supplement
shall be deemed effective.  Promptly  following the adoption of any amendment or
supplement  pursuant to this Section 26, the Company shall deliver to the Rights
Agent a copy,  certified  by the  Secretary  or any  Assistant  Secretary of the
Company,  of  resolutions of a majority of the Board of Directors of the Company
adopting such  amendment or  supplement.  Upon such  delivery,  the amendment or
supplement  shall be  administered by the Rights Agent as part of this Agreement
in accordance with the terms of this Agreement, as so amended or supplemented.

            Section  27.  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 28. Benefits of this Agreement;  Determinations  and Actions
by the Board of Directors.  Nothing in this Agreement shall be construed to give
to any  Person  other than the  Company,  the  Rights  Agent and the  registered
holders  of Rights  any legal or  equitable  right,  remedy or claim  under this
Agreement; and this Agreement shall be for the sole and exclusive benefit of the
Company, the Rights Agent and the registered holders of the Rights.

            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 of Directors of the Company 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 administration of this Agreement (including a determination
to redeem or not redeem the Rights,  to exchange or not  exchange the Rights for
Common Stock or other securities of the Company,  or to amend or supplement this
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 of  Directors  of the Company in
good  faith,  shall (x) be final,  conclusive  and binding on the  Company,  the
Rights  Agent,  the  holders of the Rights  and all other  Persons,  and (y) not
subject the Board of Directors of the Company to any liability to the holders of
the Rights.

            Section 29.  Severability.

            (a)  If  any  term,  provision,  covenant  or  restriction  of  this
Agreement or the  application  thereof to any Person or to any  circumstance  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.

            (b) If legal  counsel  to the  Company  delivers  to the  Company  a
written  opinion to the effect  that,  as a result of changes in federal  law or
Delaware law, any term, provision, covenant or restriction of this Agreement may
be invalid, void or unenforceable,  then, notwithstanding any other provision of
this Agreement to the contrary,  the Company and the


                                      -36-
<PAGE>

Rights  Agent may amend this  Agreement  to modify,  revise or delete such term,
provision,  covenant or restriction to the extent  necessary to comply with such
law as so changed.

            Section  30.   Governing   Law.  This   Agreement  and  each  Rights
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  internal  laws of such State  applicable  to
contracts to be made and performed entirely within such State.

            Section  31.  Counterparts.   This  Agreement  may  be  executed  in
counterparts and each of such  counterparts  shall for all purposes be deemed to
be an original, and both such counterparts shall together constitute but one and
the same instrument.

            Section  32.  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 of this Agreement.

            Section 33.  Grammatical  Construction.  Throughout  this Agreement,
where such  meanings  would be  appropriate,  (a) any pronouns used herein shall
include the corresponding masculine,  feminine or neuter forms (e.g., references
to "he" shall also  include  "she" and "it" and  references  to "who" and "whom"
shall also include  "which"),  (b) the plural form of nouns and  pronouns  shall
include the singular and vice-versa,  (c) reference to a Section means a Section
of this  Agreement,  and (d) the  word  "including"  means  "including,  without
limitation," whether expressly stated or not.



                 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]


                                      -37-
<PAGE>

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

                              ATMI, INC.

Attest:

                                      By:
--------------------------               ---------------------------------------
Secretary                                Name: Daniel P. Sharkey
                                         Title: Vice President, Chief Financial
[Corporate Seal]                            Officer and Treasurer



                                      FLEET NATIONAL BANK

Attest:


                                      By:
--------------------------------         --------------------------------
Name:                                    Name:
Title:                                   Title:
[Corporate Seal]


                                      -38-
<PAGE>

                                    Exhibit A

                       Form of Certificate of Designation

                           Certificate of Designation
                                       of
                                   ATMI, Inc.

      Pursuant  to Section 151 of the  General  Corporation  Law of the State of
Delaware

      We,  Daniel P.  Sharkey,  Vice  President,  Chief  Financial  Officer  and
Treasurer,  and Ward Stevens,  Secretary, of ATMI, Inc., a corporation organized
and existing  under the General  Corporation  Law of the State of Delaware  (the
"Corporation"),  in accordance  with the  provisions of Section 103 thereof,  DO
HEREBY CERTIFY:

      That  pursuant to the authority  conferred  upon the Board of Directors by
the Certificate of Incorporation  of the Corporation,  the Board of Directors on
October 13, 2000, adopted the following  resolution creating a series of 350,000
shares of Preferred Stock designated as Series A Junior Participating  Preferred
Stock:

      RESOLVED, that, pursuant to the authority vested in the Board of Directors
of the  Corporation  in accordance  with the  provisions of its  Certificate  of
Incorporation,  a series of Preferred  Stock of the Corporation be and it hereby
is created,  and that the preferences and relative,  participating,  optional or
other rights and the qualifications,  limitations or restrictions thereof are as
follows:

      SECTION  1.  Designation  and  Amount.  The  designation  of the series of
Preferred  Stock  created  by  this   resolution   shall  be  "Series  A  Junior
Participating Preferred Stock" and the number of shares constituting such series
shall be 350,000.

      SECTION 2. Dividends and Distributions.

            (A) Out of the  surplus or net  profits of the  Corporation  legally
available for the payment of dividends, the holders of shares of Series A Junior
Participating  Preferred  Stock shall be  entitled to receive,  when and as such
dividends may be declared by the Board of Directors, quarterly dividends payable
in cash on the tenth days of March,  June,  September  and December 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  Series A Junior  Participating
Preferred  Stock,  in an amount per share (rounded to the nearest cent) equal to
the  greater  of (a)  $1.00  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,  par
value  $.01 per  share,  of the  Corporation  (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 Series A Junior  Participating  Preferred  Stock.  In the
event the  Corporation  shall at any time after


                                      -39-
<PAGE>

November 9, 2000 (the "Rights  Declaration Date") (i) pay any dividend on Common
Stock payable in shares of Common Stock,  (ii) subdivide the outstanding  Common
Stock,  (iii)  combine the  outstanding  Common  Stock into a smaller  number of
shares or (iv)  issue any  shares by  reclassification  of its  shares of Common
Stock,  then in each such case the amount to which holders of shares of Series A
Junior Participating  Preferred Stock shall have been 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 shall be the number
of shares of Common  Stock  outstanding  immediately  after  such  event and the
denominator  of which  shall be the  number of shares of Common  Stock that were
outstanding immediately prior to such event.

            (B) Dividends shall begin to accrue and be cumulative on outstanding
shares of  Series A Junior  Participating  Preferred  Stock  from the  Quarterly
Dividend  Payment Date next preceding the date of issue of such shares of Series
A Junior Participating  Preferred Stock, unless the date of issue of such shares
shall be 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 on
which shares of Series A Junior Participating  Preferred Stock are first issued,
or unless the date of issue shall be a Quarterly  Dividend Payment Date or shall
be a date after the record date for the next Quarterly Dividend Payment Date 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. No interest, or sum of money in lieu of interest, shall be payable
in respect of any dividend payment or payments which may be in arrears.

            (C)   Dividends   payable   upon  the   share  of  Series  A  Junior
Participating  Preferred  Stock  shall  be  cumulative  (whether  or  not in any
dividend  period  or  periods  there  shall be  surplus  or net  profits  of the
Corporation  legally available for the payment of such dividends) so that, if on
any Quarterly  Dividend  Payment Date dividends upon the  outstanding  shares of
Series A Junior  Participating  Preferred  Stock  shall not have been  paid,  or
declared  and a sum  sufficient  for the  payment  thereof  set  apart  for such
payment, the amount of the deficiency shall be fully paid, but without interest,
or  dividends  in  such  amount  declared  on the  shares  of  Series  A  Junior
Participating  Preferred  Stock and a sum sufficient for the payment thereof set
apart for such  payment,  before any dividend  shall be declared or paid upon or
set apart for,  or any other  distribution  shall be made in respect  of, or any
payment  shall be made in respect of, or any payment shall be made on account of
the purchase of, the Common Stock or any series of Preferred  Stock  subordinate
to the Series A Junior Participating Preferred Stock.

      SECTION  3.  Distributions  to  Holders  of Series A Junior  Participating
Preferred  Stock and Common  Stock.  Out of any  surplus  or net  profits of the
Corporation  legally  available for dividends  remaining  after full  cumulative
dividends  upon any series of Preferred  Stock ranking senior to Series A Junior
Participating  Preferred  Stock  shall  have  been  paid for all  past  dividend
periods,  and after or  concurrently  with making  payment of, or declaring  and
setting  apart for payment,  full  dividends  on any series of  Preferred  Stock
ranking  senior  to the  Series  A Junior  Participating  Preferred  Stock  then
outstanding  to the most recent  Quarterly  Dividend  Payment Date and after the
Corporation  shall have complied  with the  provisions in respect of any and all
amounts then or  theretofore  required to be set aside in respect of any sinking
fund or purchase  fund with  respect to any series of  Preferred  Stock  ranking
senior to Series A Junior  Participating  Preferred  Stock then  outstanding and
entitled  to the  benefit  of a sinking  fund or  purchase  fund,  and after the
Corporation  shall have made  provision for compliance in respect of the current


                                      -40-
<PAGE>

sinking fund or purchase period for any series of Preferred Stock ranking senior
to Series A Junior  Participating  Preferred  Stock,  then and not otherwise the
holders of Series A Junior Participating Preferred Stock shall be entitled to or
may receive  dividends and redemption  payments as provided  herein.  Out of any
surplus or net  profits  of the  Corporation  legally  available  for  dividends
remaining  after full  cumulative  dividends  upon the shares of Series A Junior
Participating  Preferred Stock then outstanding shall have been paid through the
preceding  Quarterly Dividend Payment Date, and after the Corporation shall have
complied  with  the  provisions  in  respect  of any  and  all  amounts  then or
theretofore  required  (if any) to be set aside or  applied  in  respect  of any
redemption  payments  in  respect  of shares  of  Series A Junior  Participating
Preferred Stock, then and not otherwise,  the holders of Common Stock and of any
series of Preferred Stock ranking  subordinate to Series A Junior  Participating
Preferred  Stock  shall,  subject to the rights of any other series of Preferred
Stock  then  outstanding,  to  paragraph  (A) of  Section  2  hereof  and to the
provisions  of the  Certificate  of  Incorporation,  be entitled to receive such
dividends as may from time to time be declared by the Board of Directors.

      SECTION 4. Voting.

            (A)  Holders  of shares of Series A Junior  Participating  Preferred
Stock shall be entitled to 100 votes for each share of stock held.  In the event
the Corporation shall at any time after the Rights  Declaration Date (i) pay any
dividend on Common Stock payable in shares of Common Stock,  (ii)  subdivide the
outstanding  Common  Stock,  (iii) combine the  outstanding  Common Stock into a
smaller  number of shares or (iv)  issue any shares by  reclassification  of its
shares of Common Stock,  then in each such case the number of votes per share to
which holders of shares of Series A Junior  Participating  Preferred  Stock were
entitled  immediately  prior to such event shall be adjusted by multiplying such
number of votes by a  fraction  the  numerator  of which  shall be the number of
shares  of  Common  Stock  outstanding  immediately  after  such  event  and the
denominator  of which  shall be the  number of shares of Common  Stock that were
outstanding  immediately prior to such event. Except as provided in this Section
4 and except as may be required by applicable law, holders of shares of Series A
Junior  Participating  Preferred  Stock shall vote with the Common  Stock on all
matters  required to be  submitted  to holders of Common  Stock and shall not be
entitled to vote as a separate class with respect to any matter.

            (B) So long as any shares of Series A Junior Participating Preferred
Stock shall be outstanding,  the Corporation  shall not, without the affirmative
vote or written consent of the holders of a majority of the aggregate  number of
shares of Series A Junior Participating  Preferred Stock at the time outstanding
(or such greater  percentage as may be required under applicable law), acting as
a single class,  alter or change the powers,  preferences or rights given to the
Series  A  Junior   Participating   Preferred   Stock  by  the   Certificate  of
Incorporation so as to affect such powers, preferences or rights adversely.

            (C) If at the time of any  annual  meeting  of  stockholders  of the
Corporation for the election of directors a default in preference dividends,  as
the term "default in preference  dividends" is hereinafter  defined with respect
to the Series A Junior  Participating  Preferred Stock, shall exist, the holders
of the Series A Junior  Participating  Preferred Stock,  voting  separately as a
class with the  holders of any other  series of  Preferred  Stock so entitled to
vote,  shall have the right to elect two members of the Board of Directors;  and
the holders of the Common Stock shall not be entitled to vote in the election of
the  directors  of the  Corporation  to


                                      -41-
<PAGE>

be elected as provided in the foregoing clause. Whenever a default in preference
dividends shall commence to exist, the Corporation,  upon the written request of
the  holders  of 5% or more of the  outstanding  shares  of  Preferred  Stock so
entitled to vote,  shall call a special  meeting of the holders of the Preferred
Stock so entitled to vote, such special meeting to be held within 120 days after
the date on which such  request  shall be received by the  Corporation,  for the
purpose of enabling  such holders to elect  members of the Board of Directors as
provided in the immediately  preceding sentence;  provided,  however,  that such
special  meeting need not be called if an annual meeting of  stockholders of the
Corporation  for the election of directors  shall be scheduled to be held within
such 120 days;  and provided  further that in lieu of any such special  meeting,
the  election  of the  directors  to be elected  thereat  may be effected by the
written  consent of the  holders of a majority  of the  outstanding  shares that
would be entitled to be voted upon at such  special  meeting.  Prior to any such
special meeting or meetings, the number of directors of the Corporation shall be
increased to the extent  necessary to provide as additional  places on the Board
of  Directors  the  directorships  to be filled by the  directors  to be elected
thereat. Any director elected as aforesaid by the holders of shares of Preferred
Stock or of any series thereof shall cease to serve as such director  whenever a
default in preference  dividends  shall cease to exist.  If, prior to the end of
the term of any  director  elected as  aforesaid by the holders of shares of the
Preferred  Stock or of any series  thereof,  or elected by the holders of Common
Stock,  a vacancy in the office of such director shall occur by reason of death,
resignation,  removal or disability,  or for any other cause, such vacancy shall
be filled for the unexpired term in the manner provided in the Bylaws; provided,
however, that if such vacancy shall be filled by election by the stockholders at
a meeting thereof, the right to fill such vacancy shall be vested in the holders
of that class of stock or series  thereof which elected the director the vacancy
in the office of whom is so to be filled,  unless,  in any such case, no default
in  preference  dividends  shall  exist  at the time of such  election.  For the
purposes of this paragraph (C), a "default in preference dividends" with respect
to the Series A Junior  Participating  Preferred  Stock  shall be deemed to have
occurred  whenever  the amount of  dividends in arrears upon the Series A Junior
Participating  Preferred  Stock  shall  be  equivalent  to  six  full  quarterly
dividends or more, and, having so occurred, such default in preference dividends
shall be deemed to exist  thereafter  until,  but only until,  all  dividends in
arrears on all shares of the Series A Junior Participating  Preferred Stock then
outstanding  shall have been paid. The term "dividends in arrears" whenever used
in this  paragraph  (C) with  reference  to the  Series  A Junior  Participating
Preferred  Stock shall be deemed to mean (whether or not in any dividend  period
in  respect of which  such term is used  there  shall  have been  surplus or net
profits of the Corporation  legally available for the payment of dividends) that
amount which shall be equal to cumulative dividends at the rate for the Series A
Junior  Participating  Preferred Stock for all past quarterly  dividend  periods
less the amount of all dividends paid, or deemed paid, for all such periods upon
such Series A Junior  Participating  Preferred  Stock.  Nothing herein contained
shall be deemed to  prevent  an  increase  in the  number  of  directors  of the
Corporation  pursuant  to its  Bylaws  as from  time to time in  effect so as to
provide  as  additional  places on the Board of  Directors  directorships  to be
filled by the  directors  so to be elected by the holders of the Series A Junior
Participating  Preferred  Stock, or to prevent any other change in the number of
the directors of the Corporation.

            (D)  Except as set forth  herein or as  otherwise  required  by law,
holders of Series A Junior  Participating  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.


                                      -42-
<PAGE>

      SECTION 5. Reacquired Shares. Any shares of Series A Junior  Participating
Preferred Stock purchased or otherwise acquired by the Corporation 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 to be created by resolution or  resolutions  of the Board of
Directors.

      SECTION 6. Liquidation Rights.

            (A) Upon any  liquidation  (voluntary of otherwise),  dissolution or
winding up of the Corporation ("Liquidation"), the holders of shares of Series A
Junior  Participating  Preferred  Stock  shall be entitled to receive out of the
assets of the Corporation available for distribution to its stockholders, before
any  payment  or  distribution  shall be made on the  shares  of any  series  of
Preferred Stock subordinate to Series A Junior Participating  Preferred Stock as
to assets in the event of any  Liquidation  ("Junior  Shares")  or on the Common
Stock,  the  amount of  $100.00  per  share,  plus a sum equal to all  dividends
(whether or not earned or  declared) on such shares  accrued and unpaid  thereon
through the date of final distribution (the "Series A Liquidation Preference").

            (B) The  shares of  Series A Junior  Participating  Preferred  Stock
shall  be  subordinate  to any  other  series  of  Preferred  Stock  unless  the
provisions of such other series provide  otherwise,  and shall be preferred over
the Common Stock, as to assets in the event of any Liquidation.  In the event of
any  Liquidation,  the  holders of the  shares of Series A Junior  Participating
Preferred  Stock  shall  be  entitled  to  receive,  out  of the  assets  of the
Corporation  available for  distribution to its  stockholders  (after payment in
full of all amounts  payable in respect of any series of Preferred Stock ranking
senior to Series A Junior  Participating  Preferred Stock), an amount determined
as  provided  in  paragraph  (A) of this  Section 6 for every  share of Series A
Junior Participating  Preferred Stock before any distribution of assets shall be
made to the holders of any Junior  Shares or to the holders of the Common Stock.
If,  in the  event  of any  Liquidation,  the  holders  of the  Series  A Junior
Participating  Preferred Stock shall have received all the amounts to which they
shall be entitled in accordance  with the terms of paragraph (A) of this Section
6, no additional  distributions shall be made to the holders of shares of Series
A Junior  Participating  Preferred Stock unless,  prior thereto,  the holders of
shares of Common  Stock  shall have  received  an amount per share (the  "Common
Adjustment")  equal  to the  quotient  obtained  by  dividing  (i) the  Series A
Liquidation  Preference by (ii) 100 (as  appropriately  adjusted as set forth in
paragraph  (C) of this Section 6 to reflect such events as stock  splits,  stock
dividends and  recapitalizations  with respect to the Common Stock) (such number
in clause (ii) being referred to herein as the "Adjustment  Number").  Following
the  payment  of the full  amount of the  Common  Adjustment  in  respect of all
outstanding  shares of Common  Stock,  holders of Series A Junior  Participating
Preferred  Stock and  holders  of shares of Common  Stock  shall  receive  their
ratable and proportionate share of the remaining assets to be distributed to the
holders of Series A Junior Participating Preferred Stock and Common Stock in the
ratio of the  Adjustment  Number to 1 with respect to such  Preferred  Stock and
Common Stock, on a per share basis, respectively.  If, upon any Liquidation, the
amounts  payable on or with respect to Series A Junior  Participating  Preferred
Stock and any series of Preferred Stock ranking on a parity with Series A Junior
Participating  Preferred  Stock are not paid in full,  the  holders of shares of
such Preferred Stock shall share ratably in any distribution of assets according
to the  respective


                                      -43-
<PAGE>

amounts  which  would be payable in respect of the shares held by them upon such
distribution  if all amounts  payable on or with respect to such Preferred Stock
were paid in full.

            (C) In the event the Corporation  shall at any time after the Rights
Declaration  Date (i) pay any  dividend  on Common  Stock  payable  in shares of
Common Stock,  (ii) subdivide the  outstanding  Common Stock,  (iii) combine the
outstanding  Common  Stock  into a smaller  number  of shares or (iv)  issue any
shares by reclassification of its shares of Common Stock, then in each such case
the  Adjustment  Number  in  effect  immediately  prior to such  event  shall be
adjusted by multiplying  such  Adjustment  Number by a fraction the numerator of
which  shall be the  number of shares of Common  Stock  outstanding  immediately
after such event and the  denominator  of which shall be the number of shares of
Common Stock that were outstanding immediately prior to such event.

            (D) Neither the sale, lease or exchange (for cash,  shares of stock,
securities or other  consideration) of all or substantially all the property and
assets of the  Corporation  nor the merger or  consolidation  of the Corporation
into  or  with  any  other   corporation  or  other  entity  or  the  merger  or
consolidation  of any  other  corporation  or  other  entity  into or  with  the
Corporation shall be deemed to be a Liquidation for the purposes of this Section
6.

      SECTION 7. Consolidation, Merger, etc. In case the Corporation shall enter
into any  consolidation,  merger,  combination or other transaction in which the
shares of Common  Stock shall be  exchanged  for or changed  into other stock or
securities,  cash and/or any other property, then in any such case the shares of
Series  A  Junior  Participating  Preferred  Stock  shall  at the  same  time be
similarly  exchanged or changed in an amount per share (subject to the provision
for adjustment hereinafter set 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  Corporation  shall at any time  after the  Rights
Declaration  Date (i) pay any  dividend  on Common  Stock  payable  in shares of
Common Stock,  (ii) subdivide the  outstanding  Common Stock,  (iii) combine the
outstanding  Common  Stock  into a smaller  number  of shares or (iv)  issue any
shares by reclassification of its 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 Series A Junior  Participating  Preferred  Stock  shall be
adjusted by  multiplying  such amount by a fraction the numerator of which shall
be the number of shares of Common Stock outstanding immediately after such event
and the  denominator of which shall be the number of shares of Common Stock that
were outstanding immediately prior to such event.

      SECTION 8. Optional Redemption.

            (A) The Corporation shall have the option to redeem the whole or any
part of the  Series  A  Junior  Participating  Preferred  Stock at any time at a
redemption  price equal to, subject to the provision for adjustment  hereinafter
set forth, 100 times the "current per share market price" of the Common Stock on
the date of the  mailing  of the  notice of  redemption,  together  with  unpaid
accumulated  dividends  to  the  date  of  such  redemption.  In the  event  the
Corporation  shall at any time  after the  Rights  Declaration  Date (i) pay any
dividend on Common Stock payable in shares of Common Stock,  (ii)  subdivide the
outstanding  Common  Stock,  (iii) combine the  outstanding  Common Stock into a
smaller  number of shares or (iv)  issue any shares by


                                      -44-
<PAGE>

reclassification  of its  shares  of  Common  Stock,  then in each such case the
amount to which  holders  of shares of Series A Junior  Participating  Preferred
Stock  shall be  otherwise  entitled  immediately  prior to such event under the
immediately preceding sentence shall be adjusted by multiplying such amount by a
fraction  the  numerator  of which shall be the number of shares of Common Stock
outstanding  immediately  after such event and the denominator of which shall be
the number of shares of Common Stock that were outstanding  immediately prior to
such event.  The "current per share market price" on any date shall be deemed to
be the average of the closing  prices per share of such Common  Stock for the 10
consecutive Trading Days (as such term in hereinafter defined) immediately prior
to such date.  The  closing  price for each  Trading  Day shall be the last sale
price,  regular  way,  on such day or, in case no such sale takes  place on such
day, the average of the closing bid and asked  prices,  regular way, on such day
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  ("NYSE")  or, if the Common  Stock is not listed or admitted to
trading on the NYSE,  as  reported  in the  principal  consolidated  transaction
reporting  system with  respect to  securities  listed on the  principal  United
States  national  securities  exchange  on which the  Common  Stock is listed or
admitted to trading or, if the Common Stock is not listed or admitted to trading
on any United States national securities exchange, the last quoted sale price on
such day or, if not so quoted the  average of the high bid and low asked  prices
in the  over-the-counter  market  on  such  day,  as  reported  by the  National
Association of Securities Dealers, Inc. Automated Quotation System ("Nasdaq") or
such other  system  then in use or, if on any such day the  Common  Stock is not
quoted by any such  system,  the average of the closing bid and asked  prices on
such day as  furnished  by a  professional  market  maker making a market in the
Common  Stock  selected  by the Board of  Directors  of the  Corporation  (which
selection  shall be final,  binding and  conclusive  for all purposes) or, if on
such day no such  market  maker is be making a market in the Common  Stock,  the
fair market value of the Common Stock on such date as  determined  in good faith
by the Board of  Directors  of the  Corporation  (which  determination  shall be
final,  binding and conclusive  for all purposes).  The term "Trading Day" shall
mean a day on which the principal United States national  securities exchange on
which the  Common  Stock is be listed or  admitted  to  trading  is open for the
transaction  of  business  or, if the Common  Stock is not listed or admitted to
trading on any United States national securities exchange, but are traded in the
over-the-counter  market and  reported by Nasdaq,  then any day for which Nasdaq
reports the high bid and low asked prices in the over-the-counter  market, or if
the Common  Stock is not traded in the over-the  counter  market and reported by
Nasdaq,  then any day other than a  Saturday,  Sunday or a day on which  banking
institutions  in the State of New York are  authorized  or  obligated  by law or
executive order to close..

            (B) Notice of any such  redemption  shall be given by mailing to the
holders of the Series A Junior  Participating  Preferred  Stock a notice of such
redemption,  first class postage  prepaid,  not later than the thirtieth day and
not earlier than the sixtieth day before the date fixed for redemption, at their
last address as the same shall appear upon the books of Corporation.  Any notice
which  shall be mailed  in the  manner  herein  provided  shall be  conclusively
presumed  to have been duly  given,  whether or not the  stockholder  shall have
received  such  notice,  and failure  duly to give such  notice by mail,  or any
defect in such notice, to any holder of Series A Junior Participating  Preferred
Stock shall not affect the validity of the  proceedings  for the  redemption  of
such Series A Junior Participating Preferred Stock.


                                      -45-
<PAGE>

            (C) If less than all the  outstanding  shares of the Series A Junior
Participating Preferred Stock are to be redeemed by the Corporation,  the number
of shares to be redeemed  shall be  determined by the Board of Directors and the
shares to be redeemed shall be determined by lot or pro rata or in such fair and
equitable  other  manner  as may be  prescribed  by  resolution  of the Board of
Directors.

            (D) The  notice  of  redemption  to each  holder  of Series A Junior
Participating Preferred Stock shall specify (a) the number of shares of Series A
Junior Participating Preferred Stock of such holder to be redeemed, (b) the date
fixed for redemption,  (c) the redemption  price and (d) the place of payment of
the redemption price.

            (E) If any such notice of  redemption  shall have been duly given or
if the  Corporation  shall have given to the bank or trust  company  hereinafter
referred to irrevocable written authorization  promptly to give or complete such
notice,  and if on or before the  redemption  date  specified  therein the funds
necessary for such redemption  shall have been deposited by the Corporation with
the bank or trust  company  designated  in such  notice,  doing  business in the
United  States of America and having a capital,  surplus and  undivided  profits
aggregating at least $100,000,000  according to its last published  statement of
condition,  in  trust  for  the  benefit  of the  holders  of  Series  A  Junior
Participating Preferred Stock called for redemption,  then, notwithstanding that
any  certificate  for such shares so called for  redemption  shall not have been
surrendered for  cancellation,  from and after the time of such deposit all such
shares called for redemption shall no longer be deemed  outstanding,  all rights
with respect to such shares shall no longer be deemed outstanding and all rights
with  respect to such shares shall  forthwith  cease and  terminate,  except the
right of the holders  thereof to receive from such bank or trust  company at any
time after the time of such deposit the funds so deposited, without interest. In
case less than all the shares  represented by any surrendered  certificate shall
be redeemed,  a new  certificate  shall be issued  representing  the  unredeemed
shares.  Any interest  accrued on such funds so  deposited  shall be paid to the
Corporation  from time to time.  Any funds so deposited and unclaimed at the end
of six years from such redemption date shall be repaid to the Corporation, after
which the  holders of shares of Series A Junior  Participating  Preferred  Stock
called for redemption  shall look only to the Corporation  for payment  thereof;
provided,  however,  that any funds so deposited which shall not be required for
redemption  because of the exercise of any  privilege of  conversion or exchange
subsequent to the date of deposit shall be repaid to the Corporation forthwith.

      SECTION 9.  Ranking.  The Series A Junior  Participating  Preferred  Stock
shall rank junior to all other  series of  Preferred  Stock as to the payment of
dividends and the  distribution  of assets,  unless the terms of any such series
shall provide otherwise.

      SECTION 10. Fractional  Shares.  Series A Junior  Participating  Preferred
Stock may be issued in fractions of a share which shall  entitle the holder,  in
proportion  to such  holder's  fractional  shares,  to exercise  voting  rights,
receive  dividends,  participate in distributions and to have the benefit of all
other rights of holders of Series A Junior Participating Preferred Stock.


                                      -46-
<PAGE>

IN WITNESS  WHEREOF,  we have executed and subscribed  this  Certificate  and do
affirm the  foregoing  as true under the  penalties  of perjury this 13th day of
October, 2000.



                                                _______________________________
                                                Daniel P. Sharkey
                                                Vice President, Chief
                                                Financial Officer and
                                                Treasurer


Attest:


_________________________________
Ward Stevens
Secretary


                                      -47-
<PAGE>

                                    Exhibit B

                           Form of Rights Certificate



Certificate No. R-                                             ________ Rights

NOT  EXERCISABLE  AFTER  OCTOBER 12, 2010 OR EARLIER IF NOTICE OF  REDEMPTION OR
EXCHANGE IS GIVEN.  THE RIGHTS ARE SUBJECT TO  REDEMPTION  OR  EXCHANGE,  AT THE
OPTION OF THE  COMPANY,  ON THE TERMS SET FORTH IN THE  RIGHTS  AGREEMENT.  [THE
RIGHTS  REPRESENTED BY THIS RIGHTS CERTIFICATE ARE OR WERE BENEFICIALLY OWNED BY
A PERSON WHO WAS OR BECAME AN  ACQUIRING  PERSON OR AN ASSOCIATE OR AFFILIATE OF
AN  ACQUIRING  PERSON  (AS SUCH  TERMS ARE  DEFINED  IN THE  RIGHTS  AGREEMENT).
ACCORDINGLY,  THIS  RIGHTS  CERTIFICATE  AND THE RIGHTS  REPRESENTED  HEREBY MAY
BECOME  NULL AND VOID IN THE  CIRCUMSTANCES  SPECIFIED  IN  SECTION  7(e) OF THE
RIGHTS AGREEMENT.]

                               Rights Certificate

                                  ATMI, 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 October 13, 2000 (as amended, the
"Rights Agreement") between ATMI, Inc., a Delaware  corporation (the "Company"),
and Fleet National Bank (the "Rights Agent"),  unless notice of redemption shall
have been previously  given by the Company,  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., New York, New York time on October 12, 2010,
at the principal corporate trust office of the Rights Agent, or at the office of
its  successor  as  Rights  Agent,  one   one-hundredth  of  a  fully  paid  and
nonassessable share of the Junior Participating  Preferred Stock, par value $.01
per share,  of the Company (the  "Preferred  Stock"),  at a purchase  price (the
"Purchase Price") of $175.00 per one one-hundredth  share, upon presentation and
surrender of this Rights  Certificate with the Form of Election to Purchase duly
executed.  The Purchase  Price may be paid in cash or by certified bank check or
bank draft payable to the order of the Company.

            As  provided in the Rights  Agreement,  the  Purchase  Price and the
number of shares of Preferred Stock or other securities,  cash or other property
which may be purchased upon the exercise of the Rights  evidenced by this Rights
Certificate  are subject to  modification  and adjustment upon the occurrence of
certain events.

            If the  Rights  evidenced  by this  Rights  Certificate  are or were
formerly  beneficially  owned, on or after the earlier of the Distribution  Date
and the Stock  Acquisition  Date, by (i) an Acquiring Person or any Associate or
Affiliate of an Acquiring Person, or (ii) a direct or indirect  transferee of an
Acquiring Person (or of any Associate or Affiliate of an


                                      -48-
<PAGE>

Acquiring  Person),  such  Rights may become  null and void,  in which event the
holder of any such Right  (including any  subsequent  holder) shall not have any
rights with respect to such Right.

            This Rights  Certificate is subject to all of the terms,  provisions
and conditions of the Rights Agreement,  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  Rights   Certificates.
Capitalized  terms used but not  defined  in this  Rights  Certificate  that are
defined in the Rights Agreement shall have the same meanings ascribed to them in
the  Rights  Agreement.  Copies  of the  Rights  Agreement  are on  file  at the
principal executive offices of the Company and the above-mentioned office of the
Rights Agent.

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

            Subject  to the  provisions  of the  Rights  Agreement,  the  Rights
evidenced  by this  Rights  Certificate  (a) may be  redeemed  by the  Board  of
Directors of the Company at its option at a redemption  price of $.01 per Right,
subject to  adjustment,  payable,  at the  election of the  Company,  in cash or
shares (including fractional shares) of Common Stock or such other consideration
as the Board of Directors  may determine at any time prior to the earlier of (i)
12:00 a.m.  (midnight,  New York, New York time) on the Stock  Acquisition Date,
and  (ii)  the  Expiration  Date,  or  (b)  may be  exchanged  after  the  Stock
Acquisition Date by the Board of Directors of the Company at its option in whole
or in part for shares of the Company's Common Stock or other Company securities.

            No fractional  shares of Preferred  Stock (other than fractions that
are integral multiples of one one-hundredth of a share of Preferred Stock, which
may, at the election of the Company,  be evidenced by  depository  receipts) are
required to be issued upon the exercise of any Right or Rights evidenced hereby,
but in lieu thereof the Company may elect to (i) evidence  fractional  shares by
depositary  receipts,  (ii) issue scrip or warrants in  registered  form (either
represented by a certificate or  uncertificated)  or in bearer form (represented
by a  certificate)  which shall  entitle the holder to receive a full share upon
the surrender of such scrip or warrants  aggregating a full share, or (iii) make
a cash payment, as provided in the Rights Agreement.

            No holder of this Rights Certificate,  as such, shall be entitled to
vote or to receive  dividends  on, or shall be deemed for any purpose the holder
of,  Preferred Stock or of any other  securities,  cash or property which may at
any time be issuable on the exercise hereof, nor shall anything contained in the
Rights  Agreement  or this Rights  Certificate  be  construed to confer upon the
holder  hereof,  as such,  any of the rights of a  stockholder  of the  Company,
including,  without limitation,  any right to vote for the election of directors
or upon any matter submitted to


                                      -49-
<PAGE>

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 to  institute,  as a holder of Preferred
Stock or other securities  issuable on the exercise of the Rights represented by
this Rights Certificate,  any derivative action, or otherwise, until and only to
the extent the Right or Rights evidenced by this Rights  Certificate  shall have
been exercised as provided in the Rights Agreement.

            This Rights  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 _______ __, ____.

                             ATMI, INC.


                             By:
                                 ------------------------------------
                                 Daniel P. Sharkey
                                 Chief  Financial  Officer,  Vice President and
                                 Treasurer





Countersigned:

Fleet National Bank


By:   __________________________
Name:
Title:

                 [Form of Reverse Side of Rights Certificate]


                                      -50-
<PAGE>

                               Form of Assignment

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


      FOR  VALUE  RECEIVED  the  undersigned  ________________  hereby  sells,
assigns and transfers unto

(Please print name and address of transferee) _________ Rights evidenced by this
Rights  Certificate,  together with all right,  title and interest therein,  and
does hereby irrevocably constitute and appoint  ________________________  with a
power  of  attorney  to  transfer  the  said  Rights  and a  Rights  Certificate
evidencing  such  Rights  on the  books  of  ATMI,  Inc.,  with  full  power  of
substitution.

            A new Rights Certificate  evidencing the remaining balance,  if any,
of such Rights not hereby sold,  assigned and transferred shall be mailed to and
registered in the name of the undersigned  unless such person requests that such
Rights  Certificate be registered in the name of and mailed to (complete only if
a Rights  Certificate  evidencing  any  remaining  balance  of  Rights  is to be
registered in a name other than the name of the undersigned):

Please insert Social Security or
other identifying number of transferee: _________________________


-----------------------------------------------------------------
                      (Please print name and address)

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


                                      -51-
<PAGE>

                                   Certificate

            The undersigned  hereby certifies by checking the appropriate  boxes
that:

            (1) this Rights Certificate or any Rights evidenced hereby __ are __
are not being sold,  assigned and transferred by or on behalf of a Person who is
or was an Acquiring  Person or an Affiliate or Associate of an Acquiring  Person
(as such terms are defined in the Rights Agreement); and

            (2) after due inquiry and to the best knowledge of the  undersigned,
the  undersigned  __ did __did not acquire any of the Rights  evidenced  by this
Rights  Certificate  from any  Person  who is or was an  Acquiring  Person or an
Affiliate or Associate of an Acquiring Person.

Dated:  ____________________________          _________________________________
                                                          Signature


Signature Guaranteed:

Signatures  must  be  guaranteed  by  an  eligible  guarantor  institution  with
membership in a recognized  signature guarantee medallion program as approved by
the Stock Transfer Association.


                                      -52-
<PAGE>

                                     Notice


            The signature on the foregoing Form of Assignment must correspond to
the  name as  written  upon  the  face  of  this  Rights  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 is not completed,  the Company 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, in the
case of an assignment or other transfer of this Rights Certificate or any Rights
evidenced hereby,  will affix a legend to that effect on any Rights  Certificate
issued in whole or partial exchange for this Rights Certificate.


                                      -53-
<PAGE>

                          Form of Election to Purchase

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

To:   ATMI, Inc.

            The   undersigned    hereby    irrevocably    elects   to   exercise
____________________  Rights  represented by this Rights Certificate to purchase
the  shares  of  Preferred  Stock or other  securities,  cash or other  property
issuable  upon the exercise of such Rights and requests  that  certificates  for
such shares or other securities be issued in the name of, and such cash or other
property be paid to:

Please insert social security
or other identifying number: ________________________


___________________________________________________________________
                       (Please print name and address)

___________________________________________________________________

            A new Rights Certificate  evidencing the remaining balance,  if any,
of such Rights not hereby  exercised  shall be mailed to and  registered  in the
name of the undersigned unless such person requests that such Rights Certificate
be registered in the name of and mailed to (complete only if Rights  Certificate
evidencing  any remaining  balance of Rights is to be registered in a name other
than the name of the undersigned):

Please insert social security
or other identifying number: ________________________


___________________________________________________________________
                       (Please print name and address)

___________________________________________________________________


                                      -54-
<PAGE>

                                   Certificate


            The undersigned  hereby certifies by checking the appropriate  boxes
that:

            (1) the Rights evidenced by this Rights  Certificate __are __are not
being exercised by or on behalf of a Person who is or was an Acquiring Person or
an Affiliate  or Associate of an Acquiring  Person (as such terms are defined in
the Rights Agreement); and

            (2) after due inquiry and to the best knowledge of the  undersigned,
the  undersigned  __ did __ did not acquire the Rights  evidenced by this Rights
Certificate from any Person who is or was an Acquiring Person or an Affiliate or
Associate of an Acquiring Person.

Dated:  __________________________          __________________________________
                                                  Signature

Signature Guaranteed:

Signatures  must  be  guaranteed  by  an  eligible  guarantor  institution  with
membership in a recognized  signature guarantee medallion program as approved by
the Stock Transfer Association.


                                      -55-
<PAGE>

                                     Notice


            The  signature on the  foregoing  Form of Election to Purchase  must
correspond  to the name as written upon the face of this Rights  Certificate  in
every particular, without alteration or enlargement or any change whatsoever.

            In the  event  the  certification  set  forth  above  in the Form of
Election to  Purchase is not  completed,  the Company  will deem the  beneficial
owner of the Rights  evidenced  by this Rights  Certificate  to be an  Acquiring
Person or an Affiliate or Associate thereof (as defined in the Rights Agreement)
and, in the case of an assignment or other  transfer of this Rights  Certificate
or any Rights evidenced hereby, will affix a legend to that effect on any Rights
Certificate issued in whole or partial exchange for this Rights Certificate.


                                      -56-
<PAGE>

                                    Exhibit C

                Summary of Rights to Purchase Preferred Stock

            On October 13,  2000,  the Board of  Directors  of ATMI,  Inc.  (the
"Company")  authorized  the issuance of one preferred  share  purchase  right (a
"Right") for each  outstanding  share of common stock,  par value $.01 per share
(the  "Common  Stock"),  of the  Company.  The  distribution  is  payable to the
stockholders of record at the close of business on November 9, 2000 (the "Record
Date"), which is also the payment date, and with respect to all shares of Common
Stock that become outstanding after the Record Date and prior to the earliest of
the  Distribution  Date (as defined  below),  the redemption of the Rights,  the
exchange of the Rights,  or the expiration of the Rights (and, in certain cases,
following the Distribution  Date).  Each Right entitles the registered holder to
purchase from the Company one one-hundredth of a share of a Junior Participating
Preferred  Stock,  par value  $.01 per share,  of the  Company  (the  "Preferred
Stock") at an  exercise  price of $175.00  per one  one-hundredth  of a share of
Preferred Stock (the "Purchase Price"),  subject to adjustment.  The description
and terms of the Rights, and certain defined terms used herein, are set forth in
a Rights Agreement (as amended,  the "Rights Agreement") between the Company and
Fleet  National Bank as Rights Agent (the "Rights  Agent"),  dated as of October
13, 2000.

            Until the earlier to occur of (i) the  expiration  of the  Company's
redemption  rights on the date of public disclosure that a person or group other
than certain  Exempt  Persons (an  "Acquiring  Person"),  together  with persons
affiliated or associated  with such Acquiring  Person (other than those that are
Exempt  Persons),  has  acquired,  or obtained the right to acquire,  beneficial
ownership  of 15% or more (20% or more in the case of  certain  acquisitions  by
institutional investors) of the outstanding Common Stock (the "Stock Acquisition
Date") and (ii) the tenth  business day after the date (the "Tender Offer Date")
of commencement or public  disclosure of an intention to commence a tender offer
or exchange offer by a person other than an Exempt Person if, upon  consummation
of the offer, such person could acquire  beneficial  ownership of 15% or more of
the  outstanding  Common  Stock  (the  earlier of such  dates  being  called the
"Distribution  Date"), the Rights will be evidenced by Common Stock certificates
and not by separate certificates.  The Rights Agreement provides that, until the
Distribution Date (or earlier redemption, exchange or expiration of the Rights),
the Rights will be  transferred  with and only with the Common Stock.  Until the
Distribution Date (or earlier redemption, exchange or expiration of the Rights),
new Common Stock  certificates  issued after November 13, 2000, upon transfer or
new issuance of shares of Common  Stock,  will contain a notation  incorporating
the Rights  Agreement  by  reference.  Until the  Distribution  Date (or earlier
redemption,  exchange or expiration of the Rights) the surrender for transfer of
any certificate for Common Stock will also constitute the transfer of the Rights
associated  with the Common Stock  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 the
Common  Stock as of the close of business  on the  Distribution  Date,  and such
separate Right Certificates alone will evidence the Rights.

            The Rights will first become  exercisable  on the Stock  Acquisition
Date (unless sooner redeemed or exchanged).  The Rights will expire at the close
of business on October 12,


                                      -57-
<PAGE>

2010 (the  "Expiration  Date"),  unless  earlier  redeemed or  exchanged  by the
Company as described below.

            The Purchase  Price  payable,  and the number of shares of Preferred
Stock or other securities, cash or other 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 or distribution on, or a subdivision,  combination
or  reclassification  of, the Preferred Stock, (ii) upon the grant to holders of
the  Preferred  Stock of certain  rights,  options or warrants to subscribe  for
Preferred Stock or securities  convertible  into or  exchangeable  for Preferred
Stock at less than the current market price of the Preferred Stock or (iii) upon
the  distribution to holders of the Preferred Stock of evidences of indebtedness
or assets  (excluding  regular  periodic  cash  dividends,  subject  to  certain
limitations  set forth in the Rights  Agreement)  or of  subscription  rights or
warrants (other than those referred to above).  In addition,  the Purchase Price
payable, and the number of shares of Preferred Stock purchasable, on exercise of
a Right is  subject  to  adjustment  in the event  that the  Company  should (i)
declare or pay any dividend on the Common Stock  payable in Common Stock or (ii)
effect a subdivision or combination of the Common Stock into a different  number
of shares of Common Stock.

            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  shares of Preferred  Stock will be issued
(other than fractions  which are integral  multiples of one  one-hundredth  of a
share of  Preferred  Stock,  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  Stock on the last
trading date prior to the date of exercise.

            In the event  that  there is  public  disclosure  that an  Acquiring
Person has become such,  proper provision would be made so that each holder of a
Right,  other than Rights that are or were  beneficially  owned by the Acquiring
Person and certain  related  persons and  transferees  (which will thereafter be
void),  will  thereafter  have the right to receive upon exercise that number of
shares  of  Common  Stock  (or  other  securities)  having  at the  time of such
transaction  a market  value of two times the  Purchase  Price of the Right.  In
addition,  the Company's  Board of Directors has the option of exchanging all or
part of the Rights  (excluding  void  Rights)  for an equal  number of shares of
Common Stock in the manner described in the Rights Agreement.

            In the event that, at any time following  public  disclosure that an
Acquiring  Person has become such,  the Company is involved in a merger or other
business  combination  transaction  where  the  Company  is  not  the  surviving
corporation  or  where  the  Common  Stock  is  changed  or  exchanged  or  in a
transaction or transactions as a result of which 50% or more of its consolidated
assets or earning power are sold,  proper  provision  would be made so that each
holder of a Right (other than such Acquiring  Person and certain related persons
or transferees)  shall  thereafter have the right to receive,  upon the exercise
thereof at the then current  Purchase Price of the Right,  that number of shares
of common stock of the  acquiring  company or the  Company,  as the case may be,
which at the time of such transaction would have a market value of two times the
Purchase Price of the Right.


                                      -58-
<PAGE>

            At any time prior to public  disclosure that an Acquiring Person has
become  such,  the Board of  Directors  of the  Company may redeem the Rights in
whole, but not in part, at a price of $.01 per Right (the  "Redemption  Price"),
payable in cash,  shares  (including  fractional  shares) of Common Stock or any
other form of consideration deemed appropriate by the Board of Directors.

            At any time prior to the  Distribution  Date, the Board of Directors
of the Company may amend or supplement the Rights Agreement without the approval
of the Rights Agent or any holder of the Rights. From and after the Distribution
Date,  the  Board of  Directors  of the  Company  may  generally  only  amend or
supplement the Rights  Agreement  without such approval only to cure  ambiguity,
correct or  supplement  any  defective  or  inconsistent  provision or change or
supplement the Rights  Agreement in any manner which shall not adversely  affect
the interests of the holders of the Rights (other than an Acquiring Person or an
affiliate or  associate  thereof).  Immediately  upon the action of the Board of
Directors  providing  for  any  amendment  or  supplement,   such  amendment  or
supplement will be deemed effective.

            The Preferred Stock purchasable upon exercise of the Rights will not
be  redeemable.  Each share of  Preferred  Stock will be  entitled  to a minimum
preferential  quarterly dividend payment,  when, as and if declared by the Board
of  Directors  of the  Company,  equal to the greater of $1.00 per share and 100
times the dividend declared per share of Common Stock,  subject to anti-dilution
adjustment. In the event of liquidation, the holders of the Preferred Stock will
be entitled to a preferential  liquidation payment equal to $100 per share, plus
accrued and unpaid dividends, subject to anti-dilution adjustment. Each share of
Preferred  Stock  will  have 100  votes  per  share,  subject  to  anti-dilution
adjustment,  voting  together with the Common Stock. In the event of any merger,
consolidation or other transaction in which the Common Stock is exchanged,  each
share of  Preferred  Stock  will be  entitled  to  receive  100 times the amount
received per Common Stock, subject to anti-dilution adjustment.

            Exempt Persons  include (i) the Company,  (ii) any Subsidiary of the
Company,  (iii) any employee benefit plan of the Company or of any Subsidiary of
the  Company  and (iv) any Person  holding  Common  Stock for any such  employee
benefit plan or for employees of the Company or of any Subsidiary of the Company
pursuant to the terms of any such employee benefit plan.

            The Rights may have certain  anti-takeover  effects.  The Rights may
cause substantial  dilution to a person or group (except as described above with
respect to an Exempt  Person) that  attempts to acquire the Company on terms not
approved by the Board.  The Rights should not interfere with any merger or other
business  combination  approved  by the Board of  Directors  prior to the time a
person or group other than an Exempt Person has acquired beneficial ownership of
15% or more (20% or more in the case of certain  acquisitions  by  institutional
investors) of the Common Stock, because until such time the Rights may generally
be redeemed by the Company at $.01 per Right.

            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.


                                      -59-
<PAGE>

            A copy of the Rights  Agreement  has been filed with the  Securities
and Exchange  Commission as an Exhibit to the Company's  Current  Report on Form
8-K.  A copy of the  Rights  Agreement  is  available  free of  charge  from the
Company.  This summary description of the Rights does not purport to be complete
and is qualified in its entirety by reference to the Rights Agreement,  which is
hereby incorporated herein by reference.

                                      -60-



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