<PAGE>

                                                                    EXHIBIT 4.12

                                      FORM

                                       of

                                RIGHTS AGREEMENT

                                     between

                                  SYMBION, INC.

                                       and

                                  SUNTRUST BANK

                                 as Rights Agent

                         Dated as of _____________, 200_

<PAGE>

                                TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                                                          Page
<S>                                                                                                       <C>
Section 1.        CERTAIN DEFINITIONS.................................................................     1

Section 2.        APPOINTMENT OF RIGHTS AGENT.........................................................     7

Section 3.        ISSUE OF RIGHTS CERTIFICATES........................................................     7

Section 4.        FORM OF RIGHTS CERTIFICATES.........................................................     8

Section 5.        EXECUTION, AUTHENTICATION AND DELIVERY..............................................    10

Section 6.        REGISTRATION, REGISTRATION OF TRANSFER AND EXCHANGE.................................    10

Section 7.        MUTILATED, DESTROYED, LOST AND STOLEN RIGHTS CERTIFICATES...........................    11

Section 8.        EXERCISE OF RIGHTS; PURCHASE PRICE; EXPIRATION DATE OF RIGHTS.......................    12

Section 9.        CANCELLATION AND DESTRUCTION OF RIGHTS CERTIFICATES.................................    13

Section 10.       RESERVATION AND AVAILABILITY OF SHARES..............................................    14

Section 11.       RECORD DATE.........................................................................    14

Section 12.       ADJUSTMENT OF PURCHASE PRICE, NUMBER AND TYPE OF SHARES OR NUMBER OF RIGHTS.........    15

Section 13.       CERTIFICATE OF ADJUSTED PURCHASE PRICE OR NUMBER OF SHARES..........................    21

Section 14.       CONSOLIDATION, MERGER OR SALE OR TRANSFER OF ASSETS OR EARNING POWER................    21

Section 15.       FRACTIONAL RIGHTS AND FRACTIONAL SHARES.............................................    22

Section 16.       RIGHTS OF ACTION....................................................................    23

Section 17.       AGREEMENT OF RIGHTS HOLDERS.........................................................    24

Section 18.       RIGHTS CERTIFICATE HOLDER NOT DEEMED A STOCKHOLDER..................................    24

Section 19.       CONCERNING THE RIGHTS AGENT.........................................................    25
</TABLE>

<PAGE>

<TABLE>
<S>                                                                                                       <C>
Section 20.       DUTIES OF RIGHTS AGENT..............................................................    25

Section 21.       MERGER OR CONSOLIDATION OR CHANGE OF NAME OF RIGHTS AGENT...........................    27

Section 22.       CHANGE OF RIGHTS AGENT..............................................................    27

Section 23.       ISSUANCE OF NEW RIGHTS CERTIFICATES.................................................    28

Section 24.       REDEMPTION..........................................................................    28

Section 25.       MANDATORY REDEMPTION AND EXCHANGE...................................................    29

Section 26.       NOTICE OF CERTAIN EVENTS............................................................    30

Section 27.       SECURITIES LAWS REGISTRATIONS.......................................................    31

Section 28.       NOTICES.............................................................................    31

Section 29.       SUPPLEMENTS AND AMENDMENTS..........................................................    32

Section 30.       SUCCESSORS..........................................................................    33

Section 31.       BENEFITS OF THIS AGREEMENT..........................................................    33

Section 32.       SEVERABILITY........................................................................    33

Section 33.       GOVERNING LAW.......................................................................    33

Section 34.       COUNTERPARTS........................................................................    33

Section 35.       DESCRIPTIVE HEADINGS................................................................    33

Section 36.       BOARD OF DIRECTORS..................................................................    33

EXHIBITS

EXHIBIT A           -     Form of Certificate of Designation of Series A Junior Participating
                          Preferred Stock of Symbion, Inc.

EXHIBIT B           -     Form of Rights Certificate

EXHIBIT C           -     Summary of Rights to Purchase Preferred Shares
</TABLE>

                                      A-3
<PAGE>

                                RIGHTS AGREEMENT

         This Rights Agreement (this "Agreement"), dated as of _______________,
200_, is between Symbion, Inc., a Delaware corporation (the "Company"), and
SunTrust Bank, as Rights Agent.

         WHEREAS, the Board of Directors, having determined its actions to be in
the best interests of the Company, has authorized the creation of Rights, has
authorized and directed the issuance to the holders of record of Common Shares
of the Company outstanding as of the Close of Business on ___________, 200_ (the
"Record Date"), of one Right with respect to each Common Share of the Company
outstanding on the Record Date, and has further authorized and directed the
issuance of one Right with respect to each Common Share that shall become
outstanding between the Record Date and the earlier of the Distribution Date,
the Redemption Date and the Final Expiration Date; and

         WHEREAS, the Board of Directors has authorized and directed that the
terms and conditions under which the Rights are to be distributed, including
without limitation those affecting the exercise thereof, the securities or other
property to be acquired thereby and the purchase price to be paid therefor,
shall be set forth in a written agreement between the Company and a rights
agent.

         NOW, THEREFORE, in consideration of the premises and the mutual
agreements herein set forth, the parties hereto agree as follows:

         Section 1. CERTAIN DEFINITIONS. For purposes of this Agreement, the
following terms shall have the meanings indicated:

         (a)      "Acquiring Person" shall mean any Person who or which,
together with all Affiliates and Associates of such Person, shall be the
Beneficial Owner of 15% or more of the Voting Shares then outstanding, but shall
not include the Company, any Subsidiary of the Company, any employee benefit
plan of the Company or of any Subsidiary of the Company or any trustee of or
fiduciary with respect to any such plan when acting in such capacity.
Notwithstanding the foregoing:

                  (y)      no Person shall become an "Acquiring Person" solely
         as the result of an acquisition of Voting Shares by the Company which,
         by reducing the number of shares outstanding, increases the
         proportionate percentage of shares beneficially owned by such Person to
         the amount of Voting Shares necessary for such person to become an
         Acquiring Person; PROVIDED, HOWEVER, that, if a Person shall become the
         Beneficial Owner of the amount of Voting Shares necessary for such
         person to become an Acquiring Person by reason of share purchases by
         the Company and shall, after such share purchases by the Company and at
         a time when such Person is the Beneficial Owner of the amount of Voting
         Shares necessary for such person to become an Acquiring Person, become
         the Beneficial Owner of any additional Voting Shares, then such Person
         shall be deemed to be an "Acquiring Person"; and

<PAGE>

                  (z)      if the Board of Directors determines in good faith
         that a Person who would otherwise be an "Acquiring Person," as defined
         pursuant to the foregoing provisions of this Section 1(a), has become
         such inadvertently (including, without limitation, because (i) such
         Person was unaware that he or it was the Beneficial Owner of a
         percentage of Voting Shares that would otherwise cause such person to
         be an "Acquiring Person" or (ii) such Person was aware of the extent to
         which he or it is the Beneficial Owner of Voting Shares but had no
         actual knowledge of the consequences of being such a Beneficial Owner
         under this Agreement) and without any intention of changing or
         influencing control of the Company, and such Person divests as promptly
         as practicable, but in any event within the time period directed by the
         Board of Directors, a sufficient number of Common Shares so that such
         Person would no longer be an "Acquiring Person," as defined pursuant to
         the foregoing provisions of this Section 1(a), then such Person shall
         not be deemed to be or to have become an "Acquiring Person" for any
         purposes of this Agreement during any period of time (1) prior to the
         time the members of the Board of Directors shall have become aware that
         such Person had become an "Acquiring Person" (but for the provisions of
         this subsection (z)), (2) during which the members of the Board of
         Directors are making the determination called for under this subsection
         (z), and (3) during which such Person is divesting himself or itself of
         a sufficient number of Voting Shares so that such Person would no
         longer be an "Acquiring Person".

                  Nothing in this Section 1(a) shall affect the effect or
         application of Section 8(e).

         (b)      "Agreement" shall mean this Rights Agreement as the same may
be hereafter amended from time to time.

         (c)      "Affiliate" and "Associate" shall have the respective meanings
ascribed to such terms in Rule 12b-2 of the General Rules and Regulations under
the Exchange Act as in effect on the date of this Agreement.

         (d)      A Person shall be deemed the "Beneficial Owner" of and shall
be deemed to "own beneficially" any securities which (without duplication):

                  (1)      such Person or any of such Person's Affiliates or
         Associates has the right to acquire (whether such right is exercisable
         immediately or only after the passage of time, compliance with
         regulatory requirements, the fulfillment of a condition or otherwise)
         pursuant to any oral or written agreement, arrangement or understanding
         (other than customary agreements with and between underwriters and
         selling group members (A) with respect to a bona fide public offering
         of securities or (B) in connection with a placement of securities
         pursuant to Rule 144A under the Securities Act), or upon the exercise
         of conversion rights, exchange rights, rights (other than these
         Rights), warrants or options, or otherwise; or the right to vote
         pursuant to any agreement, arrangement or understanding; PROVIDED,
         HOWEVER, that a Person shall not be deemed the Beneficial Owner of, or
         to beneficially own, (i) securities tendered pursuant to a tender or
         exchange offer made by or on behalf of such Person or any of such
         Person's Affiliates or Associates until such tendered securities are
         accepted for purchase or exchange, or (ii) securities

                                        2
<PAGE>

         issuable upon exercise of Rights at any time prior to any Person
         becoming an Acquiring Person;

                  (2)      such Person or any of such Person's Affiliates or
         Associates, directly or indirectly, has the right to vote or dispose of
         or has "beneficial ownership" of (as determined pursuant to Rule 13d-3
         of the Exchange Act) or has a "pecuniary interest" or an "indirect
         pecuniary interest" in (as determined pursuant to Rule 16a-1(a)(2) of
         the Exchange Act), in either case including 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 under this subparagraph (2) as a
         result of an agreement, arrangement or understanding to vote such
         security (A) which arises solely from a revocable proxy or consent
         given to such Person in response to a public proxy or consent
         solicitation made pursuant to, and in accordance with, the applicable
         rules and regulations of the Exchange Act and (B) is not also then
         reportable on Schedule 13D under the Exchange Act (or any comparable or
         successor report); or

                  (3)      are beneficially owned, directly or indirectly, by
         any other Person with which such Person or any of such Person's
         Affiliates or Associates has any oral or written agreement, arrangement
         or understanding (other than customary agreements with and between
         underwriters and selling group members (A) with respect to a bona fide
         public offering of securities or (B) in connection with a placement of
         securities pursuant to Rule 144A under the Securities Act) for the
         purpose of acquiring, holding, voting (other than voting pursuant to a
         revocable proxy as contemplated by the proviso to subparagraph (2) of
         this paragraph) or disposing of any securities of the Company.

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

         (e)      "Board of Directors" means the Board of Directors of the
Company.

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

         (g)      "Close of Business" on any given date shall mean 5:00 P.M.,
Atlanta, Georgia time, on such date; PROVIDED, HOWEVER, that if such date is not
a Business Day it shall mean 5:00 P.M., Atlanta, Georgia time, on the next
succeeding Business Day.

         (h)      "Closing Price", with respect to any security, shall mean the
last sale price, regular way, on a specific Trading Day or, in case no such sale
takes place on such Trading Day, the average of the closing bid and asked
prices, regular way, in either case as reported in the principal consolidated
transaction reporting system with respect to securities listed

                                        3
<PAGE>

or admitted to trading on the New York Stock Exchange or, if such security is
not then listed or admitted to trading on the New York Stock Exchange, as
reported in the principal consolidated transaction reporting system with respect
to securities listed on the principal national securities exchange on which such
security is listed or admitted to trading or, if such security is not then
listed or admitted to trading on any national securities exchange, the last
quoted price or, if not so quoted, the average of the high bid and low asked
prices in the over-the-counter market, as reported by the National Association
of Securities Dealers, Inc. Automated Quotations System or such other system
then in use, or, if on any such Trading Day such security is not quoted by any
such organization, the average of the closing bid and asked prices as furnished
by a professional market maker making a market in such security selected by the
Board of Directors. If such security is not publicly held or so listed or
traded, "Closing Price" shall mean the fair value per unit of such security as
determined in good faith by the Board of Directors, whose determination shall be
described and the Closing Price set forth in a statement filed with the Rights
Agent.

         (i)      "Common Shares" when used with reference to the Company shall
mean shares of capital stock of the Company which have no preference over any
other class of stock with respect to dividends or assets, which are not
redeemable at the option of the Company and with respect to which no sinking,
purchase or similar fund is provided and shall initially mean the shares of
Common Stock, $.01 par value per share, of the Company. "Common Shares" when
used with reference to any Person other than the Company shall, if used with
reference to a corporation, mean the capital stock (or equity interest) with the
greatest voting power of such other Person or, if such other Person is a
Subsidiary of another Person, the Person or Persons which ultimately control
such first-mentioned Person and, if used with reference to any other Person,
mean the equity interest in such Person (or, if the net worth determined in
accordance with generally accepted accounting principles of another Person
(other than an individual) which controls such first-mentioned Person is greater
than such first-mentioned Person, then such other Person) with the greatest
voting power or managerial power with respect to the business and affairs of
such Person. Common Shares used without reference to the Company or any other
Person shall be deemed to refer to Common Shares of the Company unless the
context otherwise requires.

         (j)      "Company" shall mean Symbion, Inc., a Delaware corporation,
and its successors.

         (k)      "Company Order" means a written request or order signed in the
name of the Company by its Chairman of the Board, its President, its Chief
Executive Officer or a Vice President, and by its Chief Financial Officer, its
Treasurer, an Assistant Treasurer, its Secretary or an Assistant Secretary, and
delivered to the Rights Agent.

         (l)      "Corporate Trust Office" means the principal office of the
Rights Agent at which it administers its corporate trust business, which, in the
case of SunTrust Bank, shall, until hereafter changed, be its office at 58
Edgewood Avenue, Room 225, Atlanta, Georgia 30303.

         (m)      "Distribution Date" shall mean the Close of Business on the
earlier of (1) the tenth Business Day after the Shares Acquisition Date or (2)
the tenth Business Day (or such later date as may be determined by action of the
Board of Directors prior to such time

                                        4
<PAGE>

as any Person becomes an Acquiring Person) after the date of commencement by any
Person (other than the Company, any Subsidiary of the Company, any employee
benefit plan of the Company or of any Subsidiary of the Company, or any trustee
of or fiduciary with respect to any such plan when acting in such capacity) of,
or after the date of the first public announcement of, the intent of any Person
(other than the Company, any Subsidiary of the Company, any employee benefit
plan of the Company or of any Subsidiary of the Company, or any trustee of or
fiduciary with respect to any such plan when acting in such capacity) to
commence a tender or exchange offer, the consummation of which would result in
any Person becoming an Acquiring Person; PROVIDED, HOWEVER, that an occurrence
described in clause (2) of this definition above shall not cause the occurrence
of the Distribution Date if the Board of Directors shall, prior to the Close of
Business on such tenth Business Day (or such later date as described in clause
(2) above), determine that such tender or exchange offer is spurious, unless,
thereafter, the Board of Directors shall make a contrary determination, in which
event the Distribution Date shall occur on the later to occur of the Close of
Business on such tenth Business Day (or the Close of Business on such later date
as described in clause (2) above) and the Close of Business on the date of such
latter determination.

         (n)      "Exchange Act" shall mean the Securities Exchange Act of 1934
and any successor statute thereto.

         (o)      "Final Expiration Date" shall mean the Close of Business on
_________________, 201_.

         (p)      "Person" shall mean any individual, firm, corporation,
partnership, limited partnership, limited liability company, joint venture,
association, trust, unincorporated organization, group or other entity, and
shall include any successor (by merger or otherwise) of such entity.

         (q)      "Preferred Shares" shall mean shares of Series A Junior
Participating Preferred Stock, $.01 par value per share, of the Company having
the rights and preferences set forth in the form of Certificate of Designation
of Series A Junior Participating Preferred Stock of Symbion, Inc. attached
hereto as EXHIBIT A, and, to the extent that there is not a sufficient number of
shares of Series A Junior Participating Preferred Shares outstanding to permit
the full exercise of the Rights, any other authorized shares of preferred stock,
$.01 par value per share, of the Company having rights and preferences
substantially identical to such Series A Preferred Shares.

         (r)      "Purchase Price" shall mean the initial price at which the
holder of a Right may, subject to the terms and conditions of this Agreement,
purchase one one-thousandth (1/1000) of a Preferred Share (which initial price
is set forth in Section 8(b) hereof), as such price shall be adjusted pursuant
to the terms of this Agreement.

         (s)      "Record Date" shall have the meaning provided in the recitals
to this Agreement.

         (t)      "Redemption Date" shall mean the time at which the Rights are
redeemed pursuant to Section 24 herein or the time at which all of the Rights
are mandatorily redeemed and exchanged pursuant to Section 25 hereof.

                                        5
<PAGE>

         (u)      "Redemption Price" shall have the meaning specified in Section
24(b) herein.

         (v)      "Right" shall mean one preferred share purchase right which
initially represents the right of the registered holder thereof to purchase one
one-thousandth (1/1000) of a Preferred Share upon the terms and subject to the
conditions set forth herein.

         (w)      "Rights Certificate" shall mean a certificate, in
substantially the form of EXHIBIT B attached to this Agreement, evidencing the
Rights registered in the name of the holder thereof.

         (x)      "Rights Agent" shall mean SunTrust Bank and any successor
thereto appointed in accordance with the terms hereof, in its capacity as agent
for the Company and the holders of the Rights pursuant to this Agreement.

         (y)      "Rights Register" and "Rights Registrar" shall have the
meanings specified in Section 6.

         (z)      "Securities Act" shall mean the Securities Act of 1933 and any
successor statute thereto.

         (aa)     "Shares Acquisition Date" shall mean the first date of public
announcement (which for purposes of this definition shall include without
limitation a report filed pursuant to Section 13 or Section 16 of the Exchange
Act) by the Company or an Acquiring Person that an Acquiring Person has become
such.

         (bb)     "Subsidiary" of any Person shall mean any corporation or other
entity of which a majority of the outstanding capital stock or other equity
interests having ordinary voting power in the election of directors or similar
officials is owned, directly or indirectly, by such Person.

         (cc)     "Summary of Rights" shall mean a Summary of Rights to Purchase
Preferred Shares in substantially the form attached as EXHIBIT C to this
Agreement.

         (dd) "Trading Day" shall mean a day on which the principal national
securities exchange on which any of the Voting Shares are listed or admitted to
trading is open for the transaction of business or, if none of the Voting Shares
is listed or admitted to trading on any national stock exchange, a Business Day.

         (ee)     "Voting Shares" shall mean (1) the Common Shares of the
Company and (2) any other shares of capital stock of the Company entitled to
vote generally in the election of directors or entitled to vote together with
the Common Shares in respect of any merger or consolidation of the Company, any
sale of all or substantially all of the Company's assets or any liquidation,
dissolution or winding up of the Company. Whenever any provision of this
Agreement requires a determination of whether a number of Voting Shares
comprising a specified percentage of such Voting Shares is, was or will be
beneficially owned or has been voted, tendered, acquired, sold or otherwise
disposed of or a determination of whether a Person has offered or proposed to
acquire a number of Voting Shares comprising such specified percentage, the
number of Voting Shares comprising such specified percentage of

                                        6
<PAGE>

Voting Shares shall in every such case be deemed to be the number of Voting
Shares comprising the specified percentage of all the Company's then outstanding
Voting Shares.

         (ff)     "Wholly-Owned Subsidiary" of a Person shall mean any
corporation or other entity all the outstanding capital stock or other equity
interests of which having ordinary voting power in the election of directors or
similar officials (other than directors' qualifying shares or similar interests)
are owned, directly or indirectly, by such Person.

         Section 2. APPOINTMENT OF RIGHTS AGENT The Company hereby appoints the
Rights Agent to act as agent for the Company and the holders of the Rights (who,
in accordance with Section 3 hereof, shall prior to the Distribution Date also
be the holders of the Common Shares of 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.

         Section 3. ISSUE OF RIGHTS CERTIFICATES. (a) Until the Distribution
Date, (1) outstanding Rights will be evidenced (subject to the provisions of
paragraph (b) of this Section 3) (A) with respect to Common Shares that are held
in certificated form, by the certificates for outstanding Common Shares of the
Company and not by separate Rights Certificates and (B) with respect to Common
Shares that are held in book-entry form, by a notation in the records of the
Rights Agent (and the records of the Company's transfer agent if different from
the Rights Agent), and (2) the right to receive Rights Certificates will be
transferable only in connection with the transfer of Common Shares of the
Company. As soon as practicable after the Distribution Date, the Company will
prepare and execute, and the Rights Agent will countersign and send, by
first-class, insured, postage-prepaid mail, to each record holder of Common
Shares of the Company as of the Close of Business on the Distribution Date, at
the address of such holder shown on the stock transfer records of the Company, a
Rights Certificate evidencing one Right for each Common Share so held, subject
to adjustments as provided herein. From and after the Distribution Date, the
Rights will be evidenced solely by such Rights Certificates.

         (b)      On the Record Date, or as soon thereafter as practicable, the
Company will send a copy of a Summary of Rights, by first-class, postage-prepaid
mail, to each record holder of Common Shares of the Company as of the Close of
Business on the Record Date, at the address of such holder shown on the stock
transfer records of the Company. With respect to Common Shares outstanding on
the Record Date, the certificates evidencing such Common Shares shall thereafter
also evidence the outstanding Rights (as such Rights may be amended or
supplemented) distributed with respect thereto until the Distribution Date and
the registered holders of Common Shares shall also be the registered holders of
the associated Rights. Until the Distribution Date (or, if earlier, the
Redemption Date or Final Expiration Date), the surrender for registration of
transfer or exchange of (1) any certificate for Common Shares outstanding as of
the Close of Business on the Record Date, with or without a copy of the Summary
of Rights attached thereto, and (2) any Common Shares held in book-entry form,
shall also constitute the surrender for registration of transfer or exchange of
the outstanding Rights associated with the Common Shares represented thereby.

         (c)      The Company agrees that, at any time after the Record Date and
prior to the Distribution Date (or, if earlier, the Redemption Date or Final
Expiration Date) at which it

                                        7
<PAGE>

issues any of its Common Shares upon original issue or out of treasury, it will
concurrently distribute to the holder of such Common Shares one Right for each
such Common Share, which Right shall be subject to the terms and provisions of
this Agreement and will evidence the right to purchase the same number of one
one-thousandth (1/1000) of a Preferred Share at the same Purchase Price as the
Rights then outstanding.

         (d)      Certificates for Common Shares issued after the Record Date
but prior to the earliest of the Distribution Date, the Redemption Date and the
Final Expiration Date, whether upon registration of transfer or exchange of
Common Shares outstanding on the Record Date or upon original issue or out of
treasury thereafter, shall also be deemed to be certificates for the Rights and
shall have impressed on, printed on, written on or otherwise affixed to them the
following legend or such similar legend as the Company may deem appropriate and
as is not inconsistent with the provisions of this Agreement:

                  This certificate also evidences and entitles the holder hereof
         to certain Rights as set forth in a Rights Agreement between Symbion,
         Inc. (the "Company") and SunTrust Bank, as it may be amended (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 the Company. 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. The
         Company will mail to the holder of this certificate a copy of the
         Rights Agreement without charge after receipt of a written request
         therefor. As described in the Rights Agreement, Rights issued to or
         acquired by any Acquiring Person or any Affiliate or Associate thereof
         (each as defined in the Rights Agreement), whether currently held by or
         on behalf of such Person or by any subsequent holder, shall, under
         certain circumstances, become null and void.

With respect to certificates containing the foregoing legend, until the earlier
of the Distribution Date or the Final Expiration Date, outstanding Rights
associated with the Common Shares represented by such certificates shall be
evidenced by such certificates alone, and the surrender of any such certificate
for registration of transfer or exchange of the Common Shares evidenced thereby
shall also constitute surrender for registration of transfer or exchange of the
outstanding Rights (as such Rights may be amended or supplemented) associated
with the Common Shares represented thereby. The failure to print the foregoing
legend on any certificate or any other defect therein shall not affect in any
manner whatsoever the application or interpretation of the provisions of Section
8(e) hereof.

         (e)      If the Company purchases or acquires any of its Common Shares
after the Record Date, but prior to the Distribution Date, any Rights associated
with such Common Shares shall be deemed canceled and retired so that the Company
shall not be entitled to exercise any Rights associated with the Common Shares
which are no longer outstanding.

         Section 4. FORM OF RIGHTS CERTIFICATES. (a) The form of Rights
Certificates (and the forms of election to purchase Preferred Shares (or other
securities) and of assignment to be printed on the reverse thereof) shall in
form and substance be substantially the same as EXHIBIT B hereto and may have
such marks of identification or designation and such legends, summaries or
endorsements printed thereon as the Company

                                        8
<PAGE>

may deem appropriate and as are not inconsistent with the provisions of this
Agreement, as may be required to comply with any applicable law or with any rule
or regulation made pursuant thereto or with any rule or regulation of any stock
exchange on which the Rights may from time to time be listed or as may be
necessary to conform to usage. Subject to the provisions of Section 23 hereof,
the Rights Certificates, whenever issued, shall be dated as of the date of
authentication thereof, but, regardless of any adjustments of the Purchase Price
or the number of Preferred Shares (or other securities) as to which a Right is
exercisable (whether pursuant to this Agreement or any future amendments or
supplements to this Agreement), or both, occurring after the Record Date and
prior to the date of such authentication, such Rights Certificates may, on their
face, without invalidating or otherwise affecting any such adjustment, expressly
entitle the holders thereof to purchase such number of Preferred Shares at the
Purchase Price per one one-thousandth (1/1000) of a Preferred Share as to which
a Right would be exercisable if the Distribution Date were the Record Date; no
adjustment of the Purchase Price or the number of Preferred Shares (or other
securities) as to which a Right is exercisable, or both, effected subsequent to
the date of authentication of any Rights Certificate shall be invalidated or
otherwise affected by the fact that such adjustment is not expressly reflected
on the face or in the provisions of such Rights Certificate.

         (b)      Pending the preparation of definitive Rights Certificates, the
Company may execute, and upon Company Order the Rights Agent shall authenticate
and send, by first-class, insured, postage-prepaid mail, to each record holder
of Common Shares of the Company as of the Close of Business on the Distribution
Date, temporary Rights Certificates which are printed, lithographed,
typewritten, mimeographed or otherwise produced substantially of the tenor of
the definitive Rights Certificates in lieu of which they are issued and with
such appropriate insertions, omissions, substitutions and other variations as
the officers executing such Rights Certificates may determine, as evidenced by
their execution of such Rights Certificates.

         (c)      If temporary Rights Certificates are issued, the Company will
cause definitive Rights Certificates to be prepared without unreasonable delay.
After the preparation of definitive Rights Certificates, the temporary Rights
Certificates shall be exchangeable for definitive Rights Certificates, upon
surrender of the temporary Rights Certificates at the Corporate Trust Office of
the Rights Agent, without charge to the holder. Upon surrender for cancellation
of any one or more temporary Rights Certificates, the Company shall execute and
the Rights Agent shall authenticate and deliver in exchange therefor one or more
definitive Rights Certificates, evidencing a like number of Rights. Until so
exchanged, the temporary Rights Certificates shall in all respects be entitled
to the same benefits under this Agreement as definitive Rights Certificates.

         (d)      Any Rights Certificate issued pursuant to Section 3(a) or
Section 23 hereof that represents Rights beneficially owned by (1) an Acquiring
Person or any Associate or Affiliate of an Acquiring Person, (2) a transferee of
an Acquiring Person (or of any such Associate or Affiliate) who becomes a
transferee after the Acquiring Person becomes such, or (3) a transferee of an
Acquiring Person (or of any such Associate or Affiliate) who becomes a
transferee prior to or concurrently with the Acquiring Person becoming such and
receives such Rights pursuant to either (A) a transfer (whether or not for
consideration) from the Acquiring Person to holders of equity interests in such
Acquiring Person or to any Person with whom such Acquiring Person has any
continuing agreement, arrangement or

                                        9
<PAGE>

understanding regarding the transferred Rights or (B) a transfer which the Board
of Directors has determined is part of a plan, arrangement or understanding
which has as a primary purpose or effect avoidance of Section 8(e) hereof, and
any Rights Certificate issued pursuant to Section 6 or Section 7 hereof upon
transfer, exchange, replacement or adjustment of any other Rights Certificate
referred to in this sentence, 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 8(e) of such Agreement.

         Section 5. EXECUTION, AUTHENTICATION AND DELIVERY. (a) The Rights
Certificates shall be executed on behalf of the Company by its Chairman of the
Board, its President, its Chief Executive Officer or one of its Vice Presidents,
attested by its Secretary or one of its Assistant Secretaries. The signature of
any of these officers on the Rights Certificates may be manual or facsimile.

         (b)      Rights Certificates bearing the manual or facsimile signatures
of individuals who were at any time the proper officers of the Company shall
bind the Company, notwithstanding that such individuals or any of them have
ceased to hold such offices prior to the authentication and delivery of such
Rights Certificates or did not hold such offices at the date of authentication
of such Rights Certificates. At any time and from time to time after the
execution and delivery of this Agreement and prior to the Distribution Date, the
Company may deliver Rights Certificates executed by the Company to the Rights
Agent for authentication, together with a Company Order for the authentication
and delivery of such Rights Certificates; and the Rights Agent in accordance
with such Company Order shall authenticate and deliver such Rights Certificates
as provided in this Agreement and not otherwise.

         (c)      No Rights Certificate shall be entitled to any benefit under
this Agreement or be valid or obligatory for any purpose unless there appears on
such Rights Certificate a certificate of authentication substantially in the
form provided for herein executed by the Rights Agent by manual signature, and
such certificate upon any Rights Certificate shall be conclusive evidence, and
the only evidence, that such Rights Certificate has been duly authenticated and
delivered hereunder.

         Section 6. REGISTRATION, REGISTRATION OF TRANSFER AND EXCHANGE. From
and after the Distribution Date and prior to the earlier of the Redemption Date
and the Final Expiration Date, the Company shall cause to be kept at the
Corporate Trust Office of the Rights Agent a rights register (a "Rights
Register") in which, subject to such reasonable regulations as it may prescribe,
the Company shall provide for the registration of Rights Certificates and of
transfers of Rights. The Rights Agent is hereby appointed the registrar and
transfer agent (the "Rights Registrar") for the purpose of registering Rights
Certificates and transfers of Rights as herein provided and the Rights Agent
agrees to maintain such Rights Register in accordance with such regulations so
long as it continues to be designated as Rights Registrar hereunder.

                                       10
<PAGE>

         Upon surrender to the Rights Agent for registration of transfer of any
Rights Certificate, the Company shall execute, and the Rights Agent shall
authenticate and deliver, in the name of the designated transferee or
transferees, one or more new Rights Certificates evidencing a like number of
Rights.

         At the option of the holder, Rights Certificates may be exchanged for
other Rights Certificates upon surrender of the Rights Certificates to be
exchanged to the Rights Agent. Whenever any Rights Certificates are so
surrendered for exchange, the Company shall execute, and the Rights Agent shall
authenticate and deliver, the Rights Certificates which the holder making the
exchange is entitled to receive.

         All Rights Certificates issued upon any registration of transfer or
exchange of Rights Certificates shall be the valid obligations of the Company,
evidencing the same Rights, and entitled to the same benefits under this
Agreement, as the Rights Certificates surrendered upon such registration of
transfer or exchange.

         Every Rights Certificate presented or surrendered for registration of
transfer or exchange shall (if so required by the Company or the Rights Agent)
be duly endorsed, or accompanied by a written instrument of transfer in form
satisfactory to the Company and the Rights Registrar duly executed, by the
holder thereof or his attorney duly authorized in writing.

         No service charge shall be made for any registration of transfer or
exchange of Rights Certificates, but the Company may require payment of a sum
sufficient to cover any tax or other governmental charge that may be imposed in
connection with any registration of transfer or exchange of Rights Certificates,
other than exchanges not involving any transfer.

         The provisions of this Section 6 shall be subject to the provisions of
Section 4(d), Section 8(e) and Section 15.

         Section 7. MUTILATED, DESTROYED, LOST AND STOLEN RIGHTS CERTIFICATES.
(a) If any mutilated Rights Certificate is surrendered to the Rights Agent, the
Company shall execute and the Rights Agent shall authenticate and deliver in
exchange therefor a new Rights Certificate of like tenor, for a like number of
Rights and bearing a registration number not contemporaneously outstanding.

         (b)      If there shall be delivered to the Company and the Rights
Agent (1) evidence to their satisfaction of the destruction, loss or theft of a
Rights Certificate and (2) such security or indemnity, if any, as may be
required by them to save each of them and any agent of either of them harmless,
then, in the absence of notice to the Company or the Rights Agent that such
Rights Certificate has been acquired by a bona fide purchaser, the Company shall
execute and upon its request the Rights Agent shall authenticate and deliver, in
lieu of any such destroyed, lost or stolen Rights Certificate, a new Rights
Certificate of like tenor, for a like number of Rights and bearing a
registration number not contemporaneously outstanding.

         (c)      Upon the issuance of any new Rights Certificate under this
Section 7, the Company may require the payment of a sum sufficient to cover any
tax or other

                                       11
<PAGE>

governmental charge that may be imposed in relation thereto and any other
expenses (including the fees and expenses of the Rights Agent) connected
therewith.

         (d)      Every new Rights Certificate issued pursuant to this Section 7
in lieu of any destroyed, lost or stolen Rights Certificate shall constitute an
additional contractual obligation of the Company, whether or not the destroyed,
lost or stolen Rights Certificate shall be at any time enforceable by anyone,
and shall be entitled to all the benefits of this Agreement equally and
proportionately with any and all other Rights Certificates duly issued
hereunder.

         (e)      The provisions of this Section 7 are exclusive and shall
preclude (to the extent lawful) all other rights and remedies with respect to
the replacement or payment of mutilated, destroyed, lost or stolen Rights
Certificates.

         Section 8. EXERCISE OF RIGHTS; PURCHASE PRICE; EXPIRATION DATE OF
RIGHTS. (a) Subject to the provisions of Section 8(e) hereof, the registered
holder of any Rights Certificate may exercise the Rights evidenced thereby
(except as otherwise provided herein) in whole or in part at any time after the
Distribution Date upon surrender of the Rights Certificate, with the form of
election to purchase on the reverse side thereof duly executed, to the Rights
Agent at its Corporate Trust Office, together with payment of the Purchase Price
for each one one-thousandth (1/1000) of a Preferred Share (or other securities)
as to which the Rights are exercised, at or prior to the earliest of (1) the
Close of Business on the Final Expiration Date, (2) the time of redemption on
the Redemption Date or (3) the time at which such Rights are mandatorily
redeemed and exchanged as provided in Section 25 hereof.

         (b)      The Purchase Price for each one one-thousandth (1/1000) of a
Preferred Share pursuant to the exercise of a Right shall initially be
$____________, shall be subject to adjustment from time to time as provided in
Sections 12 and 14 hereof and shall be payable in lawful money of the United
States of America in accordance with paragraph (c) below.

         (c)      Upon receipt of a Rights Certificate representing exercisable
Rights, with the form of election to purchase duly executed, accompanied by
payment of the Purchase Price for the securities to be purchased and an amount
equal to any applicable transfer tax required to be paid by the holder of such
Rights Certificate in accordance with Section 10 in cash, or by certified check
or cashier's check payable to the order of the Company, the Rights Agent shall
thereupon promptly (1) (A) requisition from any transfer agent of the Preferred
Shares (or other securities) certificates for such number of one one-thousandths
of a Preferred Share (or other securities) as are to be purchased and registered
in such name or names as may be designated by the registered holder of such
Rights Certificate or, if appropriate, in the name of a depositary agent or its
nominee, 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 Preferred Shares issuable upon exercise of the
Rights hereunder with a depositary agent, requisition from such depositary agent
appointed by the Company, depositary receipts representing such number of one
one-thousandths of a Preferred Share as are to be purchased and registered in
such name or names as may be designated by such holder (in which case
certificates for the Preferred Shares represented by such receipts shall be
deposited by the transfer agent with such depositary agent), and the Company
hereby directs such depositary agent to comply with

                                       12
<PAGE>

all such requests, (2) when appropriate, requisition from the Company the amount
of cash to be paid in lieu of issuance of fractional shares in accordance with
Section 15 hereof, (3) promptly after receipt of such certificates or depositary
receipts registered in such name or names as may be designated by such holder,
cause the same to be delivered to or upon the order of the registered holder of
such Rights Certificate and (4) when appropriate, after receipt, promptly
deliver such cash to or upon the order of such holder. In the event that the
Company is obligated to issue other securities (including Common Shares) of the
Company, pay cash and/or distribute other property pursuant to Section 12(a)
hereof, the Company will make all arrangements necessary so that other
securities, cash and/or other property are available for distribution by the
Rights Agent, if and when appropriate.

         (d)      If the registered holder of the Rights Certificate shall
exercise less than all the Rights evidenced thereby, a new Rights Certificate
evidencing Rights equal to the Rights remaining unexercised shall be issued by
the Rights Agent to the registered holder of such Rights Certificate or to his
duly authorized assigns, subject to the provisions of Section 15 hereof.

         (e)      Notwithstanding anything in this Agreement to the contrary, if
any Person shall become an Acquiring Person, thereafter any Rights beneficially
owned by (1) such Acquiring Person or an Associate or Affiliate of such
Acquiring Person, (2) a transferee of such Acquiring Person (or of any such
Associate or Affiliate) who becomes a transferee after the Acquiring Person
becomes such, or (3) a transferee of an Acquiring Person (or of any such
Associate or Affiliate) who becomes a transferee prior to or concurrently with
the Acquiring Person becoming such and receives such Rights pursuant to either
(A) a transfer (whether or not for consideration) from the Acquiring Person to
holders of equity interests in such Acquiring Person or to any Person with whom
the Acquiring Person has any continuing agreement, arrangement or understanding
regarding the transferred Rights or (B) a transfer which at least a majority of
the Board of Directors has determined is part of a plan or an agreement,
arrangement or understanding which has as a primary purpose or effect the
avoidance of this Section 8(e), shall become null and void without any further
action and no holder of such Rights shall have any rights whatsoever with
respect to such Rights, whether under any provision of this Agreement or
otherwise. The Company shall use all reasonable efforts to insure that the
provisions of this Section 8(e) and Section 4(d) hereof are complied with, but
shall have no liability to any holder of Rights Certificates or other Person as
a result of its failure to make any determinations with respect to any Acquiring
Person or its Affiliates, Associates or transferees hereunder.

         Section 9. CANCELLATION AND DESTRUCTION OF RIGHTS CERTIFICATES. All
Rights Certificates surrendered for the purpose of exercise, transfer, split up
or exchange shall, if surrendered to the Company or to any of its other agents,
be delivered to the Rights Agent for such purpose and for cancellation or, if
surrendered to the Rights Agent for such purpose, shall be canceled by it. No
Rights Certificates shall be authenticated in lieu of or in exchange for any
Rights Certificates canceled as provided in this Section 9 except as expressly
permitted by any of 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, pursuant to a Company
Order,

                                       13
<PAGE>

destroy such canceled Rights Certificates and in such case shall deliver a
certificate of destruction thereof to the Company.

         Section 10. RESERVATION AND AVAILABILITY OF SHARES. (a) The Company
covenants and agrees that it will cause to be reserved and kept available out of
its authorized and unissued Preferred Shares or any Preferred Shares held in its
treasury, the number of Preferred Shares that will be sufficient to permit the
exercise in full of all outstanding Rights.

         (b)      The Company further covenants and agrees that it will, from
and after the Distribution Date, cause to be reserved and kept available out of
its authorized and unissued Common Shares or any Common Shares held in its
treasury, the number of Common Shares of the Company that will be sufficient to
permit the exercise in full of all outstanding Rights if adjusted pursuant to
Section 12(a)(2).

         (c)      The Company covenants and agrees that it will take all such
action as may be necessary to ensure that all Preferred Shares or Common Shares
of the Company issued upon exercise of Rights shall (subject to payment of the
Purchase Price) at the time of delivery of the certificates representing any
such Preferred Shares or Common Shares be duly authorized, validly issued, fully
paid and nonassessable. The Company further covenants and agrees that it will
pay when due and payable any and all federal and state transfer taxes and
charges which may be payable in respect of the issuance or delivery of the
Rights Certificates or of any Preferred Shares (or depositary receipts therefor)
or Common Shares of the Company upon the exercise of Rights. The Company shall
not, however, be required to pay any transfer tax which may be payable in
respect of any transfer or delivery of Rights Certificates to a Person other
than, or in respect of the issuance or delivery of certificates or depositary
receipts for the Preferred Shares or Common Shares of the Company upon exercise
of Rights evidenced by Rights Certificates in a name other than that of, the
registered holder of the Rights Certificate evidencing Rights surrendered for
transfer or exercise or to issue or deliver any certificates or depositary
receipts for Preferred Shares or Common Shares of the Company 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
thereof) or until it has been established to the Company's satisfaction that no
such tax is due.

         (d)      So long as the Common Shares issuable and deliverable upon the
exercise of the Rights may be listed on any national securities exchange, the
Company shall use its best efforts to promptly cause, from and after such time
as the Rights become exercisable, all Common Shares and other securities
reserved for such issuance to be listed on such exchange upon official notice of
issuance upon such exercise.

         Section 11. RECORD DATE. Each Person in whose name any certificate for
Preferred Shares or Common Shares of the Company is issued upon the exercise of,
or upon mandatory redemption and exchange of, Rights shall for all purposes be
deemed to have become the holder of record of the Preferred Shares or Common
Shares represented thereby on, and such certificate shall be dated, (a) in the
case of the exercise of Rights, 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, or (b) in the case of the
mandatory redemption and exchange of Rights, the date of such mandatory

                                       14
<PAGE>

redemption and exchange; PROVIDED, HOWEVER, that, if the date of such surrender
and payment or mandatory redemption and exchange is a date upon which the
transfer books of the Company for its Preferred Shares or Common Shares, as the
case may be, are closed, such Person shall be deemed to have become the record
holder of such shares on, and such certificate shall be dated, the next
succeeding Business Day on which such transfer books of the Company are open.
Prior to the exercise of (or the mandatory redemption and exchange of) the
Rights evidenced thereby, the holder of a Rights Certificate shall not be
entitled to any rights of a holder of Preferred Shares (or Common Shares of the
Company) for which the Rights shall be exercisable, including without limitation
the rights to vote, to receive dividends or other distributions or to exercise
any preemptive rights, and shall not be entitled to receive any notice of any
proceedings of the Company, except as provided herein.

         Section 12. ADJUSTMENT OF PURCHASE PRICE, NUMBER AND TYPE OF SHARES OR
NUMBER OF RIGHTS. The Purchase Price, the number and kind of shares of capital
stock of the Company covered by each Right and the number of Rights outstanding
are subject to adjustment from time to time as provided in this Section 12.

         (a)      (1) If the Company shall at any time after the date of this
Agreement (A) declare a dividend on the Preferred Shares payable in Preferred
Shares, (B) subdivide the outstanding Preferred Shares, (C) combine the
outstanding Preferred Shares into a smaller number of Preferred Shares or (D)
issue any shares of its capital stock in a reclassification of the Preferred
Shares (including any such reclassification in connection with a consolidation
or merger in which the Company is the continuing or surviving corporation),
except as otherwise provided in this Section 12(a), the Purchase Price in effect
at the time of the record date for such dividend or of the effective date of
such subdivision, combination or reclassification, and the number and kind of
shares of capital stock issuable on such date, shall be proportionately adjusted
so that the holder of any Right exercised thereafter shall be entitled to
receive, upon payment of the Purchase Price for the number of one
one-thousandths of a Preferred Share for which a Right was exercisable
immediately prior to such date, the aggregate number and kind of shares of
capital stock which, if such Right had been duly exercised immediately prior to
such date (at a time when the Preferred Shares transfer books of the Company
were open), such holder would have acquired upon such exercise and been entitled
to receive upon payment or effectuation of such dividend, subdivision,
combination or reclassification; PROVIDED, HOWEVER, that in no event shall the
consideration to be paid upon the exercise of one Right be less than the
aggregate par value of the shares of capital stock of the Company issuable upon
exercise of one Right. If an event occurs which would require an adjustment
under both Section 12(a)(1) and Section 12(a)(2), the adjustment provided for in
this Section 12(a)(1) shall be in addition to, and shall be made prior to, any
adjustment required pursuant to Section 12(a)(2).

         (2)      Subject to action of the Board of Directors pursuant to
Section 25 of this Agreement, if any Person shall become an Acquiring Person,
unless the event causing such Person to become an Acquiring Person is (A) a
transaction described in Section 14 hereof, or (B) an acquisition of Common
Shares pursuant to a tender offer or an exchange offer for all outstanding
Common Shares at a price and on terms determined by the Board of Directors
(excluding members of the Board of Directors who are representatives, nominees
or Affiliates of an Acquiring Person), after receiving advice from one or more
investment banking firms, to be (i) at a price that is fair to stockholders
(taking into account all factors that such members of the Board deem relevant
including, without limitation, prices that

                                       15
<PAGE>

could reasonably be achieved if the Company or its assets were sold on an
orderly basis designed to realize maximum value) and (ii) otherwise in the best
interests of its stockholders, each holder of a Right shall thereafter have a
right to receive, upon exercise thereof at a price equal to the then current
Purchase Price multiplied by the number of one one-thousandths of a Preferred
Share for which a Right is then exercisable, in accordance with the terms of
this Agreement and in lieu of Preferred Shares, such number of Common Shares of
the Company as shall equal the result obtained by (x) multiplying the then
current Purchase Price by the number of one one-thousandths of a Preferred Share
for which a Right is then exercisable and dividing that product by (y) 50% of
the then current per share market price of the Company's Common Shares
(determined pursuant to Section 12(d)) on the date such Person became an
Acquiring Person. If any Person shall become an Acquiring Person and the Rights
shall then be outstanding, the Company shall not take any action which would
eliminate or diminish the benefits intended to be afforded by the Rights.

         (3)      In the event that the number of Common Shares that are
authorized by the Company's certificate of incorporation but 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
the foregoing subparagraph (2) of this Section 12(a), the Company shall: (A)
determine the excess of (1) the value of the Common Shares issuable upon the
exercise of a Right (the "Current Value"), over (2) the Purchase Price (such
excess, the "Spread"), and (B) with respect to each Right, make adequate
provision to substitute for such Common Shares, upon exercise of the Rights and
payment of the applicable Purchase Price, (1) cash, (2) a reduction in the
Purchase Price, (3) Common Shares 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 deemed to have the same value as
shares of Common Shares (such shares of preferred stock, "Common Share
Equivalents")), (4) debt securities of the Company, (5) other assets, or (6) any
combination of the foregoing, having an aggregate value equal to the Current
Value, where such aggregate value has been determined by the Board of Directors
of the Company based upon the advice of a nationally recognized investment
banking firm selected by the Board of Directors of the Company; PROVIDED,
HOWEVER, that if the Company shall not have made adequate provision to deliver
value pursuant to clause (B) above within thirty days following the first
occurrence of a Shares Acquisition Date, then the Company shall be obligated to
deliver, upon the surrender for exercise of a Right and without requiring
payment of the Purchase Price, Common Shares (to the extent available) and then,
if necessary, cash, which shares and/or cash have an aggregate value equal to
the Spread. If the Board of Directors of the Company shall determine in good
faith that it is likely that sufficient additional Common Shares could be
authorized for issuance upon exercise in full of the Rights, the thirty-day
period set forth above may be extended to the extent necessary, but not more
than ninety days after the Shares Acquisition Date, in order that the Company
may seek stockholder approval for the authorization of such additional shares
(such period, as it may be extended, the "Substitution Period"). To the extent
that the Company determines that some action need be taken pursuant to the first
and/or second sentences of this Section 12(a)(3), the Company (x) shall provide,
subject to Section 8(e) hereof, that such action shall apply uniformly to all
outstanding Rights, and (y) may suspend the exercisability of the Rights until
the expiration of the Substitution Period in order to seek any authorization of
additional shares and/or to decide the appropriate form of distribution to be
made pursuant to such first sentence and to determine the value thereof.

                                       16
<PAGE>

In the event of any such suspension, the Company shall promptly notify the
Rights Agent in writing of such suspension and 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 (with prompt written notice to the Rights Agent that such suspension is
no longer in effect). For purposes of this Section 12(a)(3), the value of Common
Shares shall be the current market price (as determined pursuant to Section
12(d) hereof) per share of the Common Shares on the Shares Acquisition Date and
the value of any Common Stock Equivalent shall be deemed to have the same value
as the Common Shares on such date.

         (b)      If the Company shall fix a record date for the issuance of
rights, options or warrants to all holders of Preferred Shares entitling them
(for a period expiring within 45 calendar days after such record date) to
subscribe for or purchase Preferred Shares (or shares having the same rights,
privileges and preferences as the Preferred Shares ("equivalent preferred
shares")) or securities convertible into or exchangeable for Preferred Shares or
equivalent preferred shares at a price per Preferred Share or equivalent
preferred share (together with any additional consideration required upon
conversion or exchange in the case of a security convertible into or
exchangeable for Preferred Shares or equivalent preferred shares), less than the
current per share market price of the Preferred Shares (determined pursuant to
Section 12(d) on such record date), the Purchase Price to be in effect after
such record date shall be determined by multiplying the Purchase Price in effect
immediately prior to such record date by a fraction, the numerator of which
shall be the number of Preferred Shares outstanding on such record date plus the
number of Preferred Shares which the aggregate offering price of the total
number of Preferred Shares and/or equivalent preferred shares so to be offered
(together with the aggregate of any additional consideration required upon
conversion or exchange in the case of any convertible or exchangeable securities
so to be offered) would purchase at such current market price and the
denominator of which shall be the number of Preferred Shares outstanding on such
record date plus the number of additional Preferred Shares and/or equivalent
preferred shares to be offered for subscription or purchase (or into or for
which the convertible or exchangeable securities so to be offered are initially
convertible or exchangeable); PROVIDED, HOWEVER, that in no event shall the
consideration to be paid upon the exercise of one Right be less than the
aggregate par value of the shares of capital stock of the Company issuable upon
the exercise of one Right. In case all or part of such subscription or purchase
price may be paid in a form other than cash, the value of such consideration
shall be as determined in good faith by the Board of Directors, whose
determination shall be described in a statement filed with the Rights Agent.
Preferred Shares owned by or held for the account of the Company or any of its
Subsidiaries shall not be deemed outstanding for the purpose of any computation
described in this Section 12(b). The adjustment described in this Section 12(b)
shall be made successively whenever such a record date is fixed; and, if none of
such rights, options or warrants are so issued, the Purchase Price shall be
adjusted to be the Purchase Price which would then be in effect if such record
date had not been fixed.

         (c)      If the Company shall fix a record date for the making of a
distribution to all holders of the Preferred Shares (including any such
distribution made in connection with a consolidation or merger in which the
Company is the continuing or surviving corporation) of evidences of indebtedness
or assets (other than a regular quarterly cash dividend or a dividend payable in
Preferred Shares) or subscription rights or warrants (excluding those

                                       17
<PAGE>

referred to in Section 12(b)), the Purchase Price to be in effect after such
record date shall be determined by multiplying the Purchase Price in effect
immediately prior to such record date by a fraction, the numerator of which
shall be the then current per share market price of the Preferred Shares
(determined pursuant to Section 12(d)) on such record date, less the fair market
value (as determined in good faith by the Board of Directors, whose
determination shall be described in a statement filed with the Rights Agent) of
the portion of the assets or evidences of indebtedness so to be distributed or
of such subscription rights or warrants applicable to one Preferred Share and
the denominator of which shall be such current per share market price of the
Preferred Shares; PROVIDED, HOWEVER, that in no event shall the consideration to
be paid upon the exercise of one Right be less than the aggregate par value of
the shares of capital stock of the Company issuable upon exercise of one Right.
Such adjustments shall be made successively whenever such a record date is
fixed; and, if such distribution is not so made, the Purchase Price shall again
be adjusted to be the Purchase Price which would then be in effect if such
record date had not been fixed.

         (d)      (1) For the purpose of any computation hereunder, the "current
per share market price" of any security (a "Security" for the purpose of this
Section 12(d)) on any date shall be deemed to be the average of the daily
Closing Prices per share of such Security for the 30 consecutive Trading Days
immediately prior to, but not including, such date; PROVIDED, HOWEVER, that, if
the issuer of such Security announces (A) a dividend or distribution on such
Security payable in shares of such Security or Securities convertible into such
Security or (B) any subdivision, combination or reclassification of such
Security, and the ex-dividend date for such dividend or distribution, or the
record date for such subdivision, combination or reclassification, occurs during
such period of 30 Trading Days, then, and in each such case, the current per
share market price of such Security shall be appropriately adjusted to reflect
the current market price per share equivalent of such Security.

         (2)      For the purpose of any computation hereunder, the "current per
share market price" of the Preferred Shares shall be determined in the same
manner as set forth above for Common Shares in paragraph (1) of this Section
12(d). If the current per share market price of the Preferred Shares cannot be
determined in the manner provided above, the "current per share market price" of
the Preferred Shares shall be conclusively deemed to be the current per share
market price of the Common Shares (determined in the manner provided above)
multiplied by one thousand.

         (e)      No adjustment in the Purchase Price shall be required unless
such adjustment would require an increase or decrease of at least 1% in the
Purchase Price; PROVIDED, HOWEVER, that any adjustments which by reason of this
Section 12(e) are not required to be made shall be carried forward and taken
into account in any subsequent adjustment. All calculations under this Section
12 shall be made to the nearest cent or to the nearest ten-thousandth of a
Common Share or other share or one ten-millionth of a Preferred Share, as the
case may be, and references herein to the "number of one one-thousandths of a
Preferred Share" (or similar phrases) shall be construed to include fractions of
one one-thousandth of a Preferred Share. Notwithstanding the first sentence of
this Section 12(e), any adjustment required by this Section 12 shall be made no
later than the earlier of (1) three years from the date of the transaction which
requires such adjustment or (2) the thirtieth day preceding the Final Expiration
Date.

                                       18
<PAGE>

         (f)      If as a result of an adjustment made pursuant to Section
12(a), the holder of any Right thereafter exercised shall become entitled to
receive any shares of capital stock of the Company other than Preferred Shares,
thereafter the number of such other shares so receivable upon exercise of any
Right shall be subject to adjustment from time to time in a manner and on terms
as nearly equivalent as practicable to the provisions with respect to the shares
contained in this Section 12, and the provisions of this Agreement, including
without limitation Sections 8, 10, 11 and 14, with respect to the Preferred
Shares shall apply on like terms to any such other shares.

         (g)      All Rights originally issued by the Company subsequent to any
adjustment made to the Purchase Price hereunder shall, whether or not the Rights
Certificate evidencing such Rights reflects such adjusted Purchase Price,
evidence the right to purchase, at the adjusted Purchase Price, the number of
one one-thousandths of a Preferred Share purchasable from time to time hereunder
upon exercise of the Rights, all subject to further adjustment as provided
herein.

         (h)      Unless the Company shall have exercised its election as
provided in Section 12(i), upon each adjustment of the Purchase Price pursuant
to Section 12(b) or 12(c), each Right outstanding immediately prior to the
making of such adjustment shall thereafter evidence the right to purchase, at
the adjusted Purchase Price per one one-thousandth of a Preferred Share, that
number of one one-thousandths of a Preferred Share obtained by (1) multiplying
(x) the number of one-thousandths of a share covered by a Right immediately
prior to this adjustment by (y) the Purchase Price in effect immediately prior
to such adjustment of the Purchase Price and (2) dividing the product so
obtained by the Purchase Price in effect immediately after such adjustment of
the Purchase Price.

         (i)      The Company may elect on or after the date of any adjustment
of the Purchase Price to adjust the number of Rights outstanding in lieu of any
adjustment in the number of one one-thousandths of a Preferred Share purchasable
upon the exercise of a Right. Each Right outstanding after such adjustment of
the number of Rights shall be exercisable for the number of one one-thousandths
of a Preferred Share for which a Right was exercisable immediately prior to such
adjustment of the Purchase Price. Each Right held of record prior to such
adjustment of the number of Rights shall become that number of Rights
(calculated to the nearest one ten-thousandth) obtained by dividing the Purchase
Price in effect immediately prior to adjustment of the Purchase Price by the
Purchase Price in effect immediately after adjustment of the Purchase Price. The
Company shall make a public announcement of its election to adjust the number of
Rights, indicating the record date for the adjustment, and, if known at the
time, the amount of the adjustment to be made. This record date may be the date
on which the Purchase Price is adjusted or any day thereafter, but, if the
Rights Certificates have been issued, shall be at least 10 days later than the
date of the public announcement. Until such record date, however, any adjustment
in the number of one one-thousandths of a Preferred Share for which a Right
shall be exercisable made as required by this Agreement shall remain in effect.
If Rights Certificates have been issued, upon each adjustment of the number of
Rights pursuant to this Section 12(i), the Company shall, as promptly as
practicable, cause to be distributed to holders of record of Rights Certificates
on such record date Rights Certificates evidencing, subject to Section 15
hereof, the additional Rights to which such holders shall be entitled as a
result of such adjustment, or, at the option of the Company, shall cause to be
distributed to such holders of record in substitution and replacement for the
Rights Certificates held by

                                       19
<PAGE>

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
so to be distributed shall be issued, executed and authenticated in the manner
provided for herein and shall be registered in the names of the holders of
record of Rights Certificates on the record date specified in the public
announcement.

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

         (k)      Before taking any action that would cause an adjustment
reducing the Purchase Price below one one-thousandth of the amount of
consideration per Preferred Share determined by the Board of Directors to be
capital, or below one one-thousandth of the par value, if any, per Preferred
Share issuable upon exercise of the Rights, the Company agrees to take such
corporate action as is within its power, including without limitation
appropriate action by its Board of Directors, and which is, in the opinion of
its counsel, necessary in order that the Company may validly and legally issue
fully paid and nonassessable one one-thousandths of Preferred Shares at such
adjusted Purchase Price.

         (l)      In any case in which this Section 12 shall require that an
adjustment in the Purchase Price be made effective as of a record date for a
specified event, the Company may elect to defer until the occurrence of such
event the issuance to the holder of any Right exercised after such record date
of the Preferred Shares or other capital stock or securities of the Company, if
any, issuable upon such exercise over and above the Preferred Shares or other
capital stock or securities of the Company, if any, issuable upon such exercise
on the basis of the Purchase Price in effect prior to such adjustment; PROVIDED,
HOWEVER, that the Company shall deliver to such holder a due bill or other
appropriate instrument evidencing such holder's right to receive such additional
securities upon the occurrence of the event requiring such adjustment.

         (m)      Anything in this Section 12 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 12, as and to
the extent that it in its sole discretion shall determine to be advisable in
order that any combination or subdivision of the Preferred Shares, issuance
wholly for cash of any of the Preferred Shares at less than the current market
price, issuance wholly for cash of Preferred Shares or securities which by their
terms are convertible into or exchangeable for Preferred Shares, dividends on
Preferred Shares payable in Preferred Shares or issuance of rights, options or
warrants referred to in subsection (b) of this Section 12, hereafter effected by
the Company to holders of its Preferred Shares shall not be taxable to such
stockholders.

         (n)      If at any time prior to the Distribution Date, the Company
shall (1) declare or pay any dividend on the Common Shares payable in Common
Shares or (2) effect a subdivision or combination of the Common Shares (by
reclassification or otherwise than by payment of dividends in Common Shares)
into a greater or lesser number of Common Shares, then in any such case (A) the
Purchase Price in effect at the time of the record date

                                       20
<PAGE>

for such dividend or of the effective date of such subdivision or combination
shall be adjusted by multiplying such Purchase Price by a fraction, the
numerator of which is the number of Common Shares outstanding immediately before
such event and the denominator of which is the number of Common Shares
outstanding immediately after such event, and (B) the number of Rights
outstanding immediately after such event shall be adjusted, either through
cancellation of outstanding Rights or through distribution of additional Rights
(but without duplication of the Company's obligations under Section 3(c)), so
that the certificate evidencing each Common Share outstanding immediately after
such event shall also evidence the associated Right to purchase the same number
of one one-thousandths of a Preferred Share as to which a Right would have
entitled the holder thereof to purchase immediately prior to such event. The
adjustment provided for in this Section 12(n) shall be made successively
whenever such a dividend is declared or paid or such a subdivision or
combination is effected. If an event occurs which would require an adjustment
under Section 12(a)(2) and this Section 12(n), the adjustments provided for in
this Section 12(n) shall be in addition and prior to any adjustment required
pursuant to Section 12(a)(2).

         Section 13. CERTIFICATE OF ADJUSTED PURCHASE PRICE OR NUMBER OF SHARES.
Whenever an adjustment is made as provided in Section 12 or 14 hereof, 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 Common Shares of
the Company and the Preferred Shares a copy of such certificate and (c) mail a
brief summary thereof to each holder of record of a Rights Certificate in
accordance with Section 28 hereof.

         Section 14. CONSOLIDATION, MERGER OR SALE OR TRANSFER OF ASSETS OR
EARNING POWER. If, directly or indirectly at any time after a Person has become
an Acquiring Person, (a) the Company shall consolidate with, or merge with and
into, any other Person and the Company is not the continuing or surviving
corporation, (b) any Person shall merge with and into the Company and the
Company shall be the continuing or surviving corporation of such merger and, in
connection with any such merger, all or part of the Common Shares of the Company
shall be changed into or exchanged for stock or other securities of any other
Person (or the Company) or cash or any other property, or (c) the Company shall
sell or otherwise transfer (or one or more of its Subsidiaries shall sell or
otherwise transfer), in one or a series of two or more transactions, assets of
the Company or its Subsidiaries which constitute more than 50% of the assets or
which produce more than 50% of the earning power of the Company and its
Subsidiaries (taken as a whole) to any Person or any Affiliate or Associate of
such Person other than the Company or one or more of its Wholly-Owned
Subsidiaries, then, and in each such case, the Company agrees that, as a
condition to engaging in any such transaction, it will make or cause to be made
proper provision so that (1) each holder of a Right (except as otherwise
provided herein) shall thereafter have the right to receive, upon the exercise
thereof in accordance with the terms of this Agreement and in lieu of Preferred
Shares, such number of Common Shares of such other Person (including the Company
as successor thereto or as the surviving corporation) or, if such other Person
is a Subsidiary of another Person, of the Person or Persons (other than
individuals) which ultimately control such first-mentioned Person, as shall be
equal to the result obtained by (x) multiplying the then current Purchase Price
by the number of one one-thousandths of a Preferred Share for which a Right is
then exercisable (without taking into account any adjustment previously made
pursuant to Section 12(a)(2)) and dividing

                                       21
<PAGE>

that product by (y) 50% of the current per share market price of the Common
Shares of such other Person (determined pursuant to Section 12(d) hereof) on the
date of consummation of such consolidation, merger, sale or transfer; (2) the
issuer of such Common Shares shall thereafter be liable for, and shall assume,
by virtue of such consolidation, merger, sale or transfer, all the obligations
and duties of the Company pursuant to this Agreement; (3) the term "Company," as
used herein, shall thereafter be deemed to refer to such issuer; and (4) such
issuer shall take such steps (including without limitation the reservation of a
sufficient number of shares of its Common Shares in accordance with Section 10)
in connection with such consummation as may be necessary to assure that the
provisions hereof shall thereafter be applicable, as nearly as reasonably may
be, in relation to the Common Shares thereafter deliverable upon the exercise of
the Rights. The Company shall not enter into any transaction of the kind
referred to in this Section 14 if at the time of such transaction there are
outstanding any rights, warrants, instruments or securities or any agreement,
understanding or arrangements which, as a result of the consummation of such
transaction, would substantially diminish or otherwise eliminate the benefits
intended to be afforded by the Rights. The Company shall not consummate any such
consolidation, merger, sale or transfer unless prior thereto the Company and
such issuer shall have executed and delivered to the Rights Agent an agreement
supplemental to this Agreement complying with the provisions of this Section 14.
The provisions of this Section 14 shall similarly apply to successive mergers or
consolidations or sales or other transfers. For the purposes of this Section 14,
50% of the assets of the Company and its Subsidiaries shall be determined by
reference to the book value of such assets as set forth in the most recent
consolidated balance sheet of the Company and its Subsidiaries (which need not
be audited) and 50% of the earning power of the Company and its Subsidiaries
shall be determined by reference to the mathematical average of the operating
income resulting from the operations of the Company and its Subsidiaries for the
two most recent full fiscal years as set forth in the consolidated and
consolidating financial statements of the Company and its Subsidiaries for such
years; PROVIDED, HOWEVER, that, if the Company has, during such period, engaged
in a transaction or series of transactions that individually or in the aggregate
involved a significant amount of assets (determined by reference to Item 2,
Instruction 4 to Form 8-K), the determination of the earning power of the
Company shall be made by reference to the pro forma operating income of the
Company and its Subsidiaries giving effect to such transactions as if they had
occurred at the commencement of such two-year period.

         Section 15. FRACTIONAL RIGHTS AND FRACTIONAL SHARES. (a) The Company
shall not be required to issue or distribute Rights Certificates which evidence
fractional Rights. If, on the Distribution Date or thereafter, as a result of
any adjustment effected pursuant to Section 12(i) or otherwise hereunder, a
Person would otherwise be entitled to receive a Rights Certificate evidencing a
fractional Right, the Company shall, in lieu thereof, pay or cause to be paid to
such Person an amount in cash equal to the same fraction of the current market
value of a whole Right. For the purpose of this Section 15(a), the current
market value of a whole Right shall be the Closing Price of the Rights for the
Trading Day immediately prior to, but not including, the date on which such
fractional Rights would have been otherwise issuable.

         (b)      The Company shall not be required to issue fractions of
Preferred Shares (other than fractions which are integral multiples of one
one-thousandth of a Preferred Share) upon exercise of the Rights or to
distribute certificates which evidence fractional

                                       22
<PAGE>

Preferred Shares (other than fractions which are integral multiples of one
one-thousandth of a Preferred Share). Fractions of Preferred Shares in integral
multiples of one one-thousandth of a Preferred Share 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 Shares. If, on the Distribution Date or
thereafter, as a result of any adjustment effected hereunder in the number of
one one-thousandths of a Preferred Share as to which a Right has become
exercisable, a Person would otherwise be entitled to receive a fractional
Preferred Share that is not an integral multiple of one one-thousandth of a
Preferred Share, the Company shall, in lieu thereof, pay to such Person at the
time such Right is exercised as herein provided an amount in cash equal to the
same fraction (which is not an integral multiple of one one-thousandth of a
Preferred Share) of the current market value of one Preferred Share. For
purposes of this Section 15(b), the current market value of a Preferred Share
shall be the Closing Price of a Preferred Share for the Trading Day immediately
prior to, but not including, the date of such exercise.

         (c)      Should any adjustment contemplated by Section 12(a)(2) or any
mandatory redemption and exchange contemplated by Section 25 occur, the Company
shall not be required to issue fractions of Common Shares upon exercise of the
Rights or to distribute certificates which evidence fractional Common Shares. If
after any such adjustment or mandatory redemption and exchange, a Person would
otherwise be entitled to receive a fractional Common Share of the Company upon
exercise of any Rights Certificate or upon mandatory redemption and exchange as
contemplated by Section 25, the Company shall, in lieu thereof, pay to such
Person at the time such Right is exercised as herein provided or upon such
mandatory redemption and exchange an amount in cash equal to the same fraction
of the current market value of one Common Share. For purposes of this Section
15(c), the current market value of a Common Share shall be the Closing Price of
a Common Share for the Trading Day immediately prior to the date of such
exercise or the date of such mandatory redemption and exchange.

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

         Section 16. RIGHTS OF ACTION. (a) All rights of action in respect of
the obligations and duties owed to the holders of the Rights under this
Agreement are vested in the registered holders of the Rights; and, without the
consent of the Rights Agent or of the holder of any other Rights, any registered
holder of any Rights may, in his own behalf and for his own benefit, enforce,
and may institute and maintain any suit, action or proceeding, judicial or
otherwise, against the Company to enforce, or otherwise to act in respect of,
such holder's right to exercise such Rights in the manner provided in the Rights
Certificate evidencing such Rights and in this Agreement. Without limiting the
foregoing or any remedies available to the holders of Rights, it is specifically
acknowledged that the holders of Rights would not have an adequate remedy at law
for any breach of this Agreement and will be entitled to specific performance of
the obligations under, and injunctive relief against actual or threatened
violations of, the obligations of any Person subject to this Agreement.

                                       23
<PAGE>

         (b)      No right or remedy herein conferred upon or reserved to the
registered holder of Rights is intended to be exclusive of any other right or
remedy, and every right and remedy shall, to the extent permitted by law, be
cumulative and in addition to every other right and remedy given hereunder or
now or hereafter existing at law or in equity or otherwise. The assertion or
employment of any right or remedy, whether hereunder or otherwise, shall not
prevent the concurrent assertion or employment of any other appropriate right or
remedy.

         (c)      No delay or omission of any registered holder of Rights to
exercise any right or remedy accruing hereunder shall impair any such right or
remedy or constitute a waiver of any default hereunder or an acquiescence
therein. Every right and remedy given hereunder or by law to such holders may be
exercised from time to time, and as often as may be deemed expedient, by such
holders.

         Section 17. AGREEMENT OF RIGHTS HOLDERS. Every holder of a Right, by
accepting the same, consents and agrees with the Company and the Rights Agent
and with every other holder of a Right that:

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

         (b)      after the Distribution Date, the Rights Certificates are
transferable only on the registry books of the Rights Agent if surrendered at
the 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 the Rights Certificate (or, prior to the Distribution Date, the
associated Common Shares certificate) is registered as the absolute owner
thereof and of the Rights evidenced thereby (notwithstanding any notations of
ownership or writing on the Rights Certificates or the associated Common Shares
certificate made by anyone other than the Company or the Rights Agent) for all
purposes whatsoever, and neither the Company nor the Rights Agent shall be
affected by any notice to the contrary; 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, judgment or ruling (whether interlocutory or
final) 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 best efforts to have any such order,
decree, judgment or ruling lifted or otherwise overturned as soon as possible.

         Section 18. RIGHTS CERTIFICATE HOLDER NOT DEEMED A STOCKHOLDER. No
holder, as such, of any Right (whether or not then evidenced by a Rights
Certificate) shall be entitled to vote, receive dividends or be deemed for any
purpose the holder of Preferred Shares, Common Shares of the Company or any
other securities of the Company which may at any time be issuable on the
exercise (or mandatory redemption

                                       24
<PAGE>

and exchange) of the Rights represented thereby, nor shall anything contained
herein or in any Rights Certificate be construed to confer upon any such holder,
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 stockholders at any meeting thereof, to give or withhold consent to
any corporate action, to receive notice of meetings or other actions affecting
stockholders (except as provided in Section 26) or to receive dividends or
subscription rights or otherwise.

         Section 19. CONCERNING THE RIGHTS AGENT. (a) The Company agrees to pay
to the Rights Agent reasonable compensation for all services rendered by it
hereunder and, from time to time, on demand of the Rights Agent, its reasonable
expenses and counsel fees and other disbursements incurred in the administration
and execution of this Agreement and the exercise and performance of its duties
hereunder. The Company also agrees to indemnify the Rights Agent for, and to
hold it harmless against, any loss, liability or expense, incurred without gross
negligence, bad faith or willful misconduct on the part of the Rights Agent, for
anything done or omitted by the Rights Agent in connection with the acceptance
and administration of this Agreement, including the costs and expenses of
defending against any claim of liability in the premises.

         (b)      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 Shares, Common Shares or other
securities of the Company, Company Order, instrument of assignment or transfer,
power of attorney, endorsement, affidavit, letter, notice, direction, consent,
certificate, statement, or other paper or document believed by it to be genuine
and to be executed and, where necessary, verified or acknowledged, by the proper
person or persons, or otherwise upon the advice of its counsel as set forth in
Section 20 hereof.

         Section 20. DUTIES OF RIGHTS AGENT. The Rights Agent undertakes the
duties and obligations imposed by this Agreement upon the following terms and
conditions, by all of which the Company and the holders of 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 by it in good faith and in accordance with such opinion.

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

                                       25
<PAGE>

         (c)      The Rights Agent shall be liable hereunder to the Company or
any other Person only for its own gross negligence, bad faith or willful
misconduct. Anything in this Agreement to the contrary notwithstanding, in no
event shall the Rights Agent be liable for special, indirect or consequential
loss or damage of any kind whatsoever (including, but not limited to, lost
profits), even if the Rights Agent has been advised of the likelihood of such
loss or damage and regardless of the form of action.

         (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 authentication 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 have any responsibility with
respect to the validity of this Agreement or the execution and delivery hereof
(except the due execution hereof by the Rights Agent) or with respect to the
validity or execution of any Rights Certificate (except its authentication
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 exercisability of the Rights
(including the Rights becoming void pursuant to Section 12(a)(2) hereof) or any
adjustment in the terms of the Rights (including the manner, method or amount
thereof) provided for in Sections 3, 12, 14, 24 and 25, or the ascertainment 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 that such 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 Preferred Shares or Common Shares to be
issued pursuant to this Agreement or any Rights Certificate or as to whether any
Preferred Shares or Common Shares will, when issued, be duly authorized, validly
issued, fully paid and nonassessable.

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

         (g)      The Rights Agent is hereby authorized and directed to accept
instructions with respect to the performance of its duties hereunder from any
one of the Chairman of the Board, the Chief Executive Officer, the President,
any Vice President, the Treasurer, any Assistant Treasurer, the Secretary or any
Assistant Secretary of the Company, and to apply to such officers for advice or
instructions in connection with its duties, and it shall not be liable for any
action taken or suffered to be taken by it in good faith in accordance with
instructions of any such officer.

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

                                       26
<PAGE>

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

         Section 21. MERGER OR CONSOLIDATION OR CHANGE OF NAME OF RIGHTS AGENT.
Any corporation into which the Rights Agent or any successor Rights Agent may be
merged or with which it may be consolidated, or any Person resulting from any
merger or consolidation to which the Rights Agent or any successor Rights Agent
shall be a party, or any Person 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 paper or any further act on the part of any of the parties hereto,
provided that such Person would be eligible for appointment as a successor
Rights Agent under the provisions of Section 22. If at the time such successor
Rights Agent shall succeed to the agency created by this Agreement any of the
Rights Certificates shall have been authenticated but not delivered, any such
successor Rights Agent may adopt the authentication of the predecessor Rights
Agent and deliver such Rights Certificates so authenticated, and, if at that
time any of the Rights Certificates shall not have been authenticated, any
successor Rights Agent may authenticate such Rights Certificates either in the
name of the predecessor Rights Agent or in the name of the successor Rights
Agent; and in all such cases such Rights Certificates shall have the full force
provided in the Rights Certificates and in this Agreement.

         If at any time the name of the Rights Agent shall be changed and at
such time any of the Rights Certificates shall have been authenticated but not
delivered, the Rights Agent may adopt the authentication under its prior name
and deliver Rights Certificates so authenticated; and, in case at that time any
of the Rights Certificates shall not have been authenticated, the Rights Agent
may authenticate such Rights Certificates either in its prior name 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 22. CHANGE OF RIGHTS AGENT. The Rights Agent or any successor
Rights Agent may resign and be discharged from its duties under this Agreement
upon 30 days notice in writing mailed to the Company and to each transfer agent
for the Common Shares of the Company and the Preferred Shares 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 for the Common Shares of the
Company and the Preferred Shares 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. If the Company shall fail
to make such appointment within a period of 30 days after giving notice of such
removal or after it has been notified in writing of such resignation or
incapacity by the resigning or incapacitated Rights Agent or by the registered
holder of a Rights Certificate (or, prior to the Distribution Date, of Common
Shares), then any registered holder of a Rights Certificate (or, prior to the
Distribution Date, of Common Shares) may apply to any court of competent
jurisdiction for

                                       27
<PAGE>

the appointment of a new Rights Agent. Any successor Rights Agent, whether
appointed by the Company or by such a court, shall be either (a) a Person
organized and doing business under the laws of the United States or of any state
of the United States, which is authorized under such laws to exercise corporate
trust or stock transfer powers and is subject to supervision or examination by
federal or state authority and which has at the time of its appointment as
Rights Agent a combined capital and surplus of at least $50 million or (b) an
Affiliate of a Person described in clause (a) of this sentence. After
appointment, the successor Rights Agent shall be vested with the same powers,
rights, duties and responsibilities as if it had been originally named as Rights
Agent without further act or deed; but the predecessor Rights Agent shall
deliver and transfer to the successor Rights Agent any property at the time held
by it hereunder, and execute and deliver any further assurance, conveyance, act
or deed necessary for the purpose. Not later than the effective date of any such
appointment, the Company shall file notice thereof in writing with the
predecessor Rights Agent and each transfer agent for the Common Shares of the
Company and the Preferred Shares, and mail a notice thereof in writing to the
registered holders of the Rights Certificates. Failure to give any notice
provided for in this Section 22, however, or any defect therein, shall not
affect the legality or validity of the resignation or removal of the Rights
Agent or the appointment of the successor Rights Agent, as the case may be.

         Section 23. ISSUANCE OF NEW RIGHTS CERTIFICATES. Notwithstanding any of
the provisions of this Agreement or of the Rights to the contrary, the Company
may, at its option, issue new Rights Certificates evidencing Rights in such form
as may be approved by its Board of Directors to reflect any adjustment or change
in the Purchase Price per share and the number or kind or class of shares or
other securities purchasable under the Rights Certificates made in accordance
with the provisions of this Agreement.

         Section 24. REDEMPTION. (a) The Rights may be redeemed by action of the
Board of Directors pursuant to paragraph (b) of this Section 24, or may be
redeemed and exchanged by action of the Board of Directors pursuant to Section
25 herein, but shall not be redeemed in any other manner.

         (b)      The Board of Directors may, at its option, at any time prior
to the time any Person becomes an Acquiring Person redeem all but not less than
all of the then outstanding Rights at a redemption price of one thousandth of
one cent ($0.00001) per Right then outstanding, appropriately adjusted to
reflect any adjustment in the number of Rights outstanding pursuant to Section
12(i) herein (such redemption price being hereinafter referred to as the
"Redemption Price"). Any such redemption of the Rights by the Board of Directors
may be made effective at such time, on such basis and with such conditions as
the Board of Directors in its sole discretion may establish.

         (c)      The right of the registered holders of Rights Certificates to
exercise the Rights evidenced thereby or, if the Distribution Date has not
theretofore occurred, the inchoate right of the registered holders of Rights to
exercise the same shall, without notice to such holders or to the Rights Agent
and without further action, terminate and be of no further force or effect
effective as of the time of adoption by the Board of Directors of a resolution
authorizing and directing the redemption of the Rights pursuant to paragraph (b)
of this Section 24 (or, alternatively, if the Board of Directors qualified such
action as to time, basis or conditions, then at such time, on such basis and
with such conditions as the

                                       28
<PAGE>

Board of Directors may have established pursuant to such paragraph (b));
thereafter, the only right of the holders of Rights shall be to receive the
Redemption Price. The Company shall promptly give public notice of any
redemption resolution pursuant to paragraph (b) of this Section 24; PROVIDED,
HOWEVER, that the failure to give, or any defect in, any such notice shall not
affect the validity of such redemption. Within 10 days after the adoption of any
redemption resolution pursuant to paragraph (b) of this Section 24, the Company
shall give notice of such redemption 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
Distribution Date, on the registry books of the transfer agents for the Common
Shares. Any notice which is mailed in the manner herein provided shall be deemed
given, whether or not the holder receives the notice. Each such notice of
redemption shall state the method by which the payment of the Redemption Price
will be made.

         (d)      Neither the Company nor any of its Affiliates or Associates
may acquire (other than, in the case of such Affiliates and Associates, in their
capacity as holders of Common Shares of the Company), redeem or purchase for
value any Rights at any time in any manner other than as specifically set forth
in this Section 24 or in Section 25 herein, and other than in connection with
the purchase of Common Shares prior to the Distribution Date.

         Section 25. MANDATORY REDEMPTION AND EXCHANGE. (a) The Board of
Directors may, at its option, at any time after any Person becomes an Acquiring
Person, issue Common Shares of the Company in mandatory redemption of, and in
exchange for, all or part of the then outstanding and exercisable Rights (which
shall not include Rights that have become null and void pursuant to the
provisions of Section 8(e) hereof) at an exchange ratio of one Common Share for
each two Common Shares for which each Right is then exercisable pursuant to the
provisions of Section 12(a)(2) hereof. Notwithstanding the foregoing, the Board
of Directors shall not be empowered to effect such redemption and exchange at
any time after any Person (other than the Company, any Subsidiary of the
Company, any employee benefit plan of the Company or of any such Subsidiary, or
any trustee of or fiduciary with respect to any such plan when acting in such
capacity), together with all Affiliates and Associates of such Person, becomes
the Beneficial Owner of 50% or more of the Voting Shares then outstanding.

         (b)      Immediately upon the action of the Board of Directors ordering
the mandatory redemption and exchange of any Rights pursuant to subsection (a)
of this Section 25 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 such number of Common Shares as is
provided in paragraph (a) of this Section 25. The Company shall promptly give
public notice of any such redemption and exchange; PROVIDED, HOWEVER, that the
failure to give, or any defect in, such notice shall not affect the validity of
such redemption and exchange. The Company promptly shall mail a notice of any
such redemption and exchange to all the holders of such Rights at their last
addresses as they appear upon the registry books of the Rights Agent. Any notice
which is mailed in the manner herein provided shall be deemed given, whether or
not the holder receives the notice. Each such notice of mandatory redemption and
exchange shall state the method by which the redemption and exchange of the
Common Shares for Rights will be effected and, in the event of any partial
redemption and exchange, the number of Rights

                                       29
<PAGE>

which will be redeemed and exchanged. Any partial redemption and exchange shall
be effected pro rata based on the number of Rights (other than Rights which have
become null and void pursuant to the provisions of Section 8(e) hereof) held by
each holder of Rights.

         (c)      In any mandatory redemption and exchange pursuant to this
Section 25, the Company, at its option, may substitute Preferred Shares (or
equivalent preferred shares, as such term is defined in Section 12(b) hereof)
for Common Shares, at the initial rate of one one-thousandth of a Preferred
Share (or equivalent preferred share) for each Common Share, as appropriately
adjusted.

         (d)      In any exchange pursuant to this Section 25, the Company, at
its option, may substitute for any Common Shares exchangeable for a Right (i)
Common Share Equivalents, (ii) cash, (iii) debt securities of the Company, (iv)
other assets, or (v) any combination of the foregoing, having an aggregate value
which the Board of Directors shall have determined in good faith to be equal to
the current market price of one Common Share (determined pursuant to Section
12(d) hereof) on the Trading Day immediately preceding the date of exchange
pursuant to this Section 25.

         Section 26. NOTICE OF CERTAIN EVENTS. If the Company shall, on or after
the Distribution Date, propose (a) to pay any dividend or other distribution
payable in stock of any class of the Company or any Subsidiary of the Company to
the holders of its Preferred Shares, (b) to distribute to the holders of its
Preferred Shares rights or warrants to subscribe for or to purchase any
additional Preferred Shares or shares of stock of any class or any other
securities, rights or options, (c) to make any other distribution to the holders
of its Preferred Shares (other than a regular quarterly cash dividend), (d) to
effect any reclassification of its Preferred Shares (other than a
reclassification involving only the subdivision of outstanding Preferred
Shares), (e) to effect any consolidation or merger into or with, or to effect
any sale or other transfer (or to permit one or more of its Subsidiaries to
effect any sale or other transfer), in one or more transactions, of more than
50% of the assets or earning power of the Company and its Subsidiaries
(determined as provided in Section 14 herein) to, any other Person (other than
the Company or a Wholly-Owned Subsidiary or Wholly-Owned Subsidiaries), (f) to
effect the liquidation, dissolution or winding up of the Company or (g) if the
Rights have theretofore become exercisable with respect to Common Shares
pursuant to Section 12(a)(2) herein, to declare or pay any dividend or other
distribution on the Common Shares payable in Common Shares or in stock of any
other class of the Company or any Subsidiary of the Company or to effect a
subdivision or combination of the Common Shares (by reclassification or
otherwise than by payment of dividends in Common Shares) then, in each such
case, the Company shall give to each holder of a Rights Certificate, in
accordance with Section 28 hereof, notice of such proposed action, which shall
specify the date of authorization by the Board of Directors of, and record date
for, such stock dividend or such distribution of rights or warrants or the date
on which such reclassification, consolidation, merger, sale, transfer,
liquidation, dissolution, winding up, subdivision or combination is to take
place and the date of participation therein by the holders of the Common Shares
of the Company or the Preferred Shares, or both, if any such date is to be
fixed. Such notice shall be so given in the case of any action covered by clause
(a), (b) or (g) above at least 20 days prior to the record date for determining
holders of the Preferred Shares or of the Common Shares of the Company, as the
case may be, 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

                                       30
<PAGE>

participation therein by the holders of the Preferred Shares or Common Shares of
the Company, as the case may be, whichever shall be the earlier.

         If any of the events set forth in Section 12(a)(2) of this Agreement
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 28 hereof, a notice of the occurrence of such event, which shall specify
the event and the consequences of the event to holders of Rights under Section
12(a)(2) hereof.

         Section 27. SECURITIES LAWS REGISTRATIONS. To the extent legally
required, the Company agrees that it will prepare and file, as soon as
practicable following the Distribution Date, and will use its best efforts to
cause to be declared effective, a registration statement under the Securities
Act registering the offering, sale and delivery of the Preferred Shares issuable
upon exercise of the Rights, and the Company will, thereafter, use its best
efforts to maintain such registration statement (or another) continuously in
effect so long as any Rights remain outstanding and exercisable with respect to
Preferred Shares. Should the Rights become exercisable with respect to
securities of the Company or one of its Subsidiaries other than Preferred
Shares, the Company agrees that it will, to the extent legally required,
promptly thereafter prepare and file, or cause to be prepared and filed, and
will use its best efforts to cause to be declared effective, a registration
statement under such Act registering the offering, sale and delivery of such
other securities and the Company will, thereafter, use its best efforts to
maintain such registration statement (or another) continuously in effect so long
as any outstanding Rights are exercisable with respect to such securities. The
Company further agrees to use its best efforts, from and after the Distribution
Date, to qualify or register for sale the Preferred Shares or other securities
of the Company or one of its Subsidiaries issuable upon exercise of the Rights
under the securities or "blue sky" laws (to the extent legally required
thereunder) of all jurisdictions in which registered holders of Rights
Certificates reside determined by reference to the Rights Register. The Company
may temporarily suspend, for a period of time not to exceed ninety days after
the Distribution Date, 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 promptly notify the Rights Agent in writing of
such suspension and 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 (with prompt
written notice to the Rights Agent that such suspension is no longer in effect).
Notwithstanding any provision of this Agreement to the contrary, the Rights
shall not be exercisable in any jurisdiction if the requisite qualification in
such jurisdiction shall not have been obtained, the exercise thereof shall not
be permitted under applicable law or a registration statement shall not have
been declared effective.

         Section 28. 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 is filed in writing with
the Rights Agent) as follows:

                  Symbion, Inc.
                  40 Burton Hills Boulevard, Suite 500
                  Nashville, Tennessee 37215

                                       31
<PAGE>

         Subject to the provisions of Section 22 hereof, 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 is filed in writing with the Company) as follows:

                  SunTrust Bank
                  Stock Transfer Department
                  58 Edgewood Avenue, Room 225
                  Atlanta, Georgia  30303
                  Attn:  Department Manager
                  Telephone: (404) 588-7622

Notices or demands authorized by this Agreement to be given or made by the
Company or the Rights Agent to 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 Rights
Register of the Company or, prior to the Distribution Date, on the stock
transfer records for the Common Shares of the Company.

         Section 29. SUPPLEMENTS AND AMENDMENTS. The Company may from time to
time supplement or amend this Agreement (which supplement or amendment shall be
evidenced by a writing signed by the Company and the Rights Agent) without the
approval of any holders of any certificates representing Common Shares or any
holders of Rights Certificates in order to cure any ambiguity, to correct or
supplement any provision contained herein which may be defective or inconsistent
with any other provisions herein, to make any other provisions in regard to
matters or questions arising hereunder, or to add, delete, modify or otherwise
amend any provision, which the Company may deem necessary or desirable,
including without limitation extending the Final Expiration Date; PROVIDED THAT
the period during which the Rights may be redeemed may not be extended at a time
when the Rights are not then redeemable; PROVIDED FURTHER, HOWEVER, that, from
and after the Shares Acquisition Date, any such amendment or supplement shall
not materially and adversely affect the interests of the holders of Rights
Certificates other than an Acquiring Person or transferees of such Acquiring
Person. Without limiting the foregoing, the Board of Directors may by resolution
adopted at any time prior to such time as any Person becomes an Acquiring Person
amend this Agreement to lower the threshold set forth in the definition of
Acquiring Person herein from 15% to a percentage not less than the greater of
any percentage greater than the largest percentage of the outstanding Voting
Shares then known to the Company to be beneficially owned by any Person (other
than the Company, any Subsidiary of the Company, any employee benefit plan of
the Company or of any Subsidiary of the Company, or any trustee of or fiduciary
with respect to any such plan when acting in such capacity) and 10%, if the
Board of Directors shall determine that a Person whose interests are adverse to
the Company and its stockholders may seek to acquire control of the Company.
Upon the delivery of a certificate from an appropriate officer of the Company,
which states that the proposed supplement or amendment is in compliance with the
terms of this Section 29 and, provided such supplement or amendment does not
change or increase the Rights Agent's rights, duties, liabilities or obligations
hereunder, the Rights Agent shall execute such supplement or amendment.

                                       32
<PAGE>

         Section 30. 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 31. BENEFITS OF THIS AGREEMENT. Nothing in this Agreement shall
be construed to give to any Person other than the Company, the Rights Agent and
the registered holders of the Rights any legal or equitable right, remedy or
claim under this Agreement; but this Agreement shall be for the sole and
exclusive benefit of the Company, the Rights Agent and the registered holders of
the Rights.

         Section 32. SEVERABILITY. If any term, provision, covenant or
restriction of this Agreement is held by a court of competent jurisdiction or
other authority to be invalid, void or unenforceable, the remainder of the
terms, provisions, covenants and restrictions of this Agreement shall remain in
full force and effect and shall in no way be affected, impaired or invalidated.

         Section 33. 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 laws of such State applicable to contracts to be made and
performed entirely within such State.

         Section 34. COUNTERPARTS. This Agreement may be executed in any number
of counterparts and each of such counterparts shall for all purposes be deemed
to be an original, and all such counterparts shall together constitute but one
and the same instrument.

         Section 35. DESCRIPTIVE HEADINGS. Descriptive headings of the several
Sections of this Agreement are inserted for convenience only and shall not
control or affect the meaning or construction of any of the provisions hereof.

         Section 36. BOARD OF DIRECTORS. The Board of Directors shall have the
exclusive power and authority to administer this Agreement and to exercise the
rights and powers specifically granted to the Board of Directors or to the
Company. All such actions, calculations, interpretations and determinations that
are done or made by the Board of Directors in good faith shall be final,
conclusive and binding on the Company, the Rights Agent, the holders of the
Rights, as such, and all other Persons. The Rights Agent shall always be
entitled to assume that the Company's Board of Directors acted in good faith and
shall be fully protected and incur no liability in reliance thereon.

                                       33
<PAGE>

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

SYMBION, INC.

By: ____________________________                       Attest:
       Richard E. Francis, Jr.
       Chairman and Chief Executive Officer

                                                       By: _____________________
                                                             R. Dale Kennedy
                                                             Secretary

SUNTRUST BANK

By: ____________________________                       Attest:

Title: _________________________                       By: _____________________

                                                       Title: __________________

                                       34
<PAGE>

                                    EXHIBIT A

                                     FORM OF
                           CERTIFICATE OF DESIGNATION
                                       OF
                  SERIES A JUNIOR PARTICIPATING PREFERRED STOCK
                                       OF
                                  SYMBION, INC.

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

         Symbion, Inc., a Delaware corporation (the "Corporation"), through the
undersigned duly authorized officer, in accordance with the provisions of
Sections 103 and 151 of the General Corporation Law of the State of Delaware,
DOES HEREBY CERTIFY:

         That, the Board of Directors of the Corporation on _____, 200_,
pursuant to the authority conferred upon the Board of Directors by the
Certificate of Incorporation of the Corporation (the "Certificate of
Incorporation") and in accordance with the provisions of Section 151 of the
General Corporation Law of the State of Delaware, adopted the following
resolution creating a series of ______ shares of Preferred Stock, par value $.01
per share:

         RESOLVED, that, pursuant to the authority expressly granted to and
vested in the Board of Directors of the Corporation in accordance with the
provisions of Section 4(b) of the Certificate of Incorporation, a series of the
Preferred Stock of the Corporation, par value $.01 per share, be, and it hereby
is, created and that the voting powers, designations, preferences and relative,
participating, optional and other special rights of the shares of such series,
and the qualifications, limitations or restrictions thereof are as follows:

SERIES A JUNIOR PARTICIPATING PREFERRED STOCK:

         (a)      DESIGNATION AND AMOUNT. The shares of such series shall be
designated as "Series A Junior Participating Preferred Stock" (the "Series A
Junior Preferred Stock") and the number of shares constituting the Series A
Junior Preferred Stock shall be ________. Such number of shares may be increased
or decreased by resolution of the Board of Directors; PROVIDED, that no decrease
shall reduce the number of shares of Series A Junior Preferred Stock to a number
less than the number of shares then outstanding plus the number of shares
reserved for issuance upon the exercise of outstanding options, rights or
warrants or upon the conversion of any outstanding securities issued by the
Corporation convertible into Series A Junior Preferred Stock.

         (b)      DIVIDENDS AND DISTRIBUTIONS.

                  (i)      Subject to the rights of the holders of any shares of
         any series of Preferred Stock (or any similar stock) ranking prior and
         superior to the Series A Junior Preferred Stock with respect to
         dividends, the holders of shares of Series A Junior Preferred Stock, in
         preference to the holders of Common Stock, $.01 par value per share
         (the "Common Stock"), of the Corporation, and of any other junior

                                      A-1
<PAGE>

         stock, shall be entitled to receive, when, as and if declared by the
         Board of Directors out of funds legally available for the purpose,
         quarterly dividends payable on the first business day of February, May,
         August and November in each year (each such date being referred to
         herein as a "Quarterly Dividend Payment Date") as provided in
         paragraphs (ii) and (iii) of this Section (b) in an amount per share
         (rounded to the nearest cent) equal to the greater of (A) $1.00 in cash
         or (B) subject to the provision for adjustment hereinafter set forth,
         1,000 times the aggregate per share amount (payable in cash) of all
         cash dividends, and 1,000 times the aggregate per share amount (payable
         in kind) of all non-cash dividends or other distributions, other than a
         dividend payable in shares of Common Stock or a subdivision of the
         outstanding shares of Common Stock (by reclassification or otherwise),
         declared on the Common Stock since the immediately preceding Quarterly
         Dividend Payment Date or with respect to the first Quarterly Dividend
         Payment Date, since the first issuance of any share or fraction of a
         share of Series A Junior Preferred Stock. If the Corporation shall at
         any time declare or pay any dividend on the Common Stock payable in
         shares of Common Stock, or effect a subdivision or combination or
         consolidation of the outstanding shares of Common Stock (by
         reclassification or otherwise) into a greater or lesser number of
         shares of Common Stock, then in each such case the amount to which
         holders of shares of Series A Junior Preferred Stock were entitled
         immediately prior to such event under clause (B) of the preceding
         sentence shall be adjusted by multiplying such amount by a fraction,
         the numerator of which is the number of shares of Common Stock
         outstanding immediately after such event and the denominator of which
         is the number of shares of Common Stock that was outstanding
         immediately prior to such event.

                  (ii)     The Corporation shall declare a dividend or
         distribution on the Series A Junior Preferred Stock as provided in
         paragraph (i) of this Section (b) immediately after it declares a
         dividend or distribution on the Common Stock (other than a dividend
         payable in shares of Common Stock); PROVIDED that, if no dividend or
         distribution shall have been declared on the Common Stock during the
         period between any Quarterly Dividend Payment Date and the next
         subsequent Quarterly Dividend Payment Date, a dividend of $1.00 per
         share payable in cash on the Series A Junior Preferred Stock shall
         nevertheless accrue and be cumulative on the outstanding shares of
         Series A Junior Preferred Stock as provided in paragraph (iii) of this
         Section (b).

                  (iii)    Dividends shall begin to accrue and be cumulative on
         outstanding shares of Series A Junior Preferred Stock from the
         Quarterly Dividend Payment Date next preceding the date of issue of
         such shares, unless the date of issue of such shares is prior to the
         record date for the first Quarterly Dividend Payment Date, in which
         case dividends on such shares shall begin to accrue from the date of
         issue of such shares, or unless the date of issue is a Quarterly
         Dividend Payment Date or is a date after the record date for the
         determination of holders of shares of Series A Junior Preferred Stock
         entitled to receive a quarterly dividend and before such Quarterly
         Dividend Payment Date, in either of which events such dividends shall
         begin to accrue and be cumulative from such Quarterly Dividend Payment
         Date. Accrued but unpaid dividends shall not bear interest. Dividends
         paid on the shares of Series A Junior Preferred Stock in an amount less
         than the total amount of such dividends at the time accrued and payable
         on such shares shall be allocated pro rata

                                      A-2
<PAGE>

         on a share-by-share basis among all such shares at the time
         outstanding. The Board of Directors may fix a record date for the
         determination of holders of shares of Series A Junior Preferred Stock
         entitled to receive payment of a dividend or distribution declared
         thereon, which record date shall be not more than 60 days prior to the
         date fixed for the payment thereof.

         (c)      Voting Rights. The holders of shares of Series A Junior
Preferred Stock shall have the following voting rights:

                  (i)      Subject to the provisions for adjustment hereinafter
         set forth, each share of Series A Junior Preferred Stock shall entitle
         the holder thereof to 1,000 votes on all matters submitted to a vote of
         the stockholders of the Corporation. If the Corporation shall at any
         time declare or pay any dividend on Common Stock payable in shares of
         Common Stock, or effect a subdivision or combination of the outstanding
         shares of Common Stock (by reclassification or otherwise) into a
         greater or lesser number of shares of Common Stock, then in each such
         case the number of votes per share to which holders of shares of Series
         A Junior Preferred Stock were entitled immediately prior to such event
         shall be adjusted by multiplying such number by a fraction the
         numerator of which is the number of shares of Common Stock outstanding
         immediately after such event and the denominator of which is the number
         of shares of Common Stock that was outstanding immediately prior to
         such event.

                  (ii)     Except as otherwise provided herein, in the
         Certificate of Incorporation, as it may be amended from time to time,
         in any other Certificate of Designation creating a series of Preferred
         Stock or any similar stock, or by law, the holders of shares of Series
         A Junior Preferred Stock and the holders of shares of Common Stock and
         any other capital stock of the Corporation having general voting rights
         shall vote together as one class on all matters submitted to a vote of
         stockholders of the Corporation.

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

         (d)      CERTAIN RESTRICTIONS.

                  (i)      Whenever quarterly dividends or other dividends or
         distributions payable on the Series A Junior Preferred Stock as
         provided in Section (b) are in arrears, thereafter and until all
         accrued and unpaid dividends and distributions, whether or not
         declared, on shares of Series A Junior Preferred Stock outstanding
         shall have been paid in full, or declared and a sum sufficient for the
         payment therefor be set apart for payment and be in the process of
         payment, the Corporation shall not:

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

                                      A-3
<PAGE>

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

                           (C)      redeem or purchase or otherwise acquire for
                  consideration shares of any stock ranking junior (either as to
                  dividends or upon liquidation, dissolution or winding up) to
                  the Series A Junior Preferred Stock, PROVIDED that the
                  Corporation may at any time redeem, purchase or otherwise
                  acquire shares of any such junior stock in exchange for shares
                  of any stock of the Corporation ranking junior (as to both
                  dividends and upon dissolution, liquidation or winding up) to
                  the Series A Junior Preferred Stock; or

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

                  (ii) The Corporation shall not permit any subsidiary of the
         Corporation to purchase or otherwise acquire for consideration any
         shares of stock of the Corporation unless the Corporation could, under
         paragraph (i) of this Section (d), purchase or otherwise acquire such
         shares at such time and in such manner.

         (e)      REACQUIRED SHARES. Any shares of Series A Junior Preferred
Stock purchased or otherwise acquired by the Corporation in any manner
whatsoever shall be retired and canceled promptly after the acquisition thereof.
All such shares shall upon their cancellation become authorized but unissued
shares of Preferred Stock and may be reissued as part of a new series of
Preferred Stock subject to the conditions and restrictions on issuance set forth
herein, in the Certificate of Incorporation, or in any other Certificate of
Designation creating a series of Preferred Stock or any similar stock or as
otherwise required by law.

         (f)      LIQUIDATION, DISSOLUTION OR WINDING UP. Upon any liquidation,
dissolution or winding up of the Corporation, no distribution shall be made (i)
to the holders of shares of stock ranking junior (either as to dividends or as
to amounts payable upon liquidation, dissolution or winding up) to the Series A
Junior Preferred Stock unless, prior thereto, the holders of Series A Junior
Preferred Stock shall have received an amount per share (rounded to the nearest
cent) equal to the greater of (A) $1,000 per share, or (B) an amount per share,
subject to the provision for adjustment hereinafter set forth, equal to

                                      A-4
<PAGE>

1,000 times the aggregate amount to be distributed per share to holders of
Common Stock, plus, in either case, an amount equal to accrued and unpaid
dividends and distributions thereon, whether or not declared, to the date of
such payment, or (ii) to the holders of stock ranking on a parity (either as to
dividends or as to amounts payable upon liquidation, dissolution or winding up)
with the Series A Junior Preferred Stock, except distributions made ratably on
the Series A Junior Preferred Stock and all such parity stock in proportion to
the total amounts to which the holders of all such Shares are entitled upon such
liquidation, dissolution or winding up. If the Corporation shall at any time
declare or pay any dividend on Common Stock payable in shares of Common Stock,
or effect a subdivision or combination or consolidation of the outstanding
shares of Common Stock (by reclassification or otherwise) into a greater or
lesser number of shares of Common Stock, then in each such case the aggregate
amount to which holders of shares of Series A Junior Preferred Stock were
entitled immediately prior to such event under the proviso in clause (i)(B) of
the preceding sentence shall be adjusted by multiplying such amount by a
fraction the numerator of which is the number of shares of Common Stock
outstanding immediately after such event and the denominator of which is the
number of shares of Common Stock that was outstanding immediately prior to such
event.

         (g)      CONSOLIDATION, MERGER, ETC. If the Corporation shall enter
into any consolidation, merger, combination or other transaction in which the
shares of Common Stock are exchanged for or changed into other stock or
securities, cash or any other property, or any combination thereof, then in any
such case each share of Series A Junior Preferred Stock shall at the same time
be similarly exchanged or changed into an amount per share, subject to the
provision for adjustment hereinafter set forth, equal to 1,000 times the
aggregate amount of stock, securities, cash or any other property (payable in
kind), or any combination thereof, as the case may be, into which or for which
each share of Common Stock is changed or exchanged. If the Corporation shall at
any time declare or pay any dividend on the Common Stock payable in shares of
Common Stock, or effect a subdivision or combination or consolidation of the
outstanding shares of Common Stock (by reclassification or otherwise) into a
greater or lesser number of shares of Common Stock, then in each such case the
amount set forth in the preceding sentence with respect to the exchange or
change of shares of Series A Junior Preferred Stock shall be adjusted by
multiplying such amount by a fraction, the numerator of which is the number of
shares of Common Stock outstanding immediately after such event and the
denominator of which is the number of shares of Common Stock that was
outstanding immediately prior to such event.

         (h)      REDEMPTION. The shares of Series A Junior Preferred Stock
shall not be redeemable. So long as any shares of Series A Junior Preferred
Stock remain outstanding, the Corporation shall not purchase or otherwise
acquire for consideration any shares of stock ranking junior (either as to
dividends or upon liquidation, dissolution or winding up) to the Series A Junior
Preferred Stock unless the Corporation shall substantially concurrently also
purchase or acquire for consideration a proportionate number of shares of Series
A Junior Preferred Stock.

         (i)      RANK. The Series A Junior Preferred Stock shall rank, with
respect to payment of dividends and the distribution of assets, junior to all
series of any other class of the Corporation's Preferred Stock; provided that
any class or series of the Corporation's Preferred Stock hereafter created may
expressly provide that such class or series shall be

                                      A-5
<PAGE>

pari passu with the Series A Preferred Stock with respect to the payment of
dividends and distributions, voting rights and/or distributions upon
liquidation, dissolution or winding up of the Corporation.

         (j)      AMENDMENT. The Certificate of Incorporation of the Corporation
shall not be amended in any manner which would materially alter or change the
powers, preferences, privileges or special rights of the Series A Junior
Preferred Stock so as to affect them adversely without the affirmative vote of
the holders of at least two-thirds of the outstanding shares of Series A Junior
Preferred Stock, voting together as a single class.

         IN WITNESS WHEREOF, this Certificate of Designation is executed on
behalf of the Corporation by its President, and attested by its Secretary, this
______ day of _____________, 200_.

SYMBION, INC.

By:________________________________________
         Richard E. Francis, Jr.
         Chairman and Chief Executive Officer

ATTEST:

___________________________________________
         R. Dale Kennedy
         Secretary

                                      A-6
<PAGE>

                                    EXHIBIT B

                           Form of Rights Certificate

Certificate No. R -__________                                      _____ Rights

         NOT EXERCISABLE AFTER ____________, 201_ OR EARLIER IF REDEMPTION OR
EXCHANGE OCCURS. THE RIGHTS ARE SUBJECT TO REDEMPTION AT $.00001 PER RIGHT AND
TO EXCHANGE ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT. UNDER CERTAIN
CIRCUMSTANCES, RIGHTS BENEFICIALLY OWNED BY ACQUIRING PERSONS (AS DEFINED IN
SECTION 1 OF THE RIGHTS AGREEMENT) OR ANY SUBSEQUENT HOLDER OF SUCH RIGHTS MAY
BECOME NULL AND VOID.

                               Rights Certificate

                                  SYMBION, 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 _____________, 200_ (the "Rights
Agreement"), between SYMBION, INC., a Delaware corporation (the "Company"), and
SunTrust Bank (the "Rights Agent"), to purchase from the Company at any time
after the Distribution Date (as such term is defined in the Rights Agreement)
and prior to 5:00 p.m., Nashville, Tennessee time, on ____________, 201_, at the
Corporate Trust Office of the Rights Agent (or at the office of its successor as
Rights Agent), one one-thousandth (1/1000) of a fully paid non-assessable share
of Series A Junior Participating Preferred Stock, $.01 par value per share (the
"Preferred Shares"), of the Company, at a purchase price of $________ per one
one-thousandth (1/1000) of a Preferred Share (the "Purchase Price"), upon
presentation and surrender of this Rights Certificate with the Form of Election
to Purchase duly executed. The number of Rights evidenced by this Rights
Certificate (and the number of one one-thousandths of a Preferred Share which
may be purchased upon exercise hereof) set forth above, and the Purchase Price
set forth above, are the number and Purchase Price as of ____________, 200_,
based on the Preferred Shares as constituted at such date. As provided in the
Rights Agreement, the Purchase Price and the number of one one-thousandths of a
Preferred Share which may be purchased upon the exercise of the Rights evidenced
by this Rights Certificate are subject to modification and adjustment upon the
happening of certain events.

         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. Copies of
the Rights Agreement are on file at the principal executive offices of the
Company and the Corporate Trust Office of the Rights Agent.

         This Rights Certificate, with or without other Rights Certificates,
upon surrender at the Corporate Trust Office of the Rights Agent, may be
exchanged for another Rights

                                      B-1
<PAGE>

Certificate or Rights Certificates of like tenor and date evidencing Rights
entitling the holder to purchase a like aggregate number of Preferred Shares as
the Rights evidenced by the Rights Certificate or Rights Certificates
surrendered shall have 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 Certificate (i) may be redeemed by the Company at a redemption price of
$.00001 per Right or (ii) may be exchanged by the Company in whole or in part
for Preferred Shares or shares of the Company's common stock, $.01 par value per
share.

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

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

         This Rights Certificate shall not be entitled to any benefit under the
Rights Agreement or be valid or obligatory for any purpose until it shall have
been authenticated by the Rights Agent.

         WITNESS the facsimile signatures of the proper officers of the Company
and its corporate seal.

Dated as of ___________________, ____.

ATTEST:                                              SYMBION, INC.

_____________________________________                By:________________________

Name:________________________________                Name:______________________

Title:_______________________________                Title:_____________________

                                      B-2
<PAGE>

Authentication:

This is one of the Rights Certificates referred to in the within-mentioned
Rights Agreement.

SunTrust Bank,
as Rights Agent

By:______________________________
Authorized Signature

                  [Form of Reverse Side of Rights Certificate]

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

         FOR VALUE RECEIVED, _______________________ hereby sells, assigns and
transfers unto _________________________________________________________ (Please
print name and address of transferee) this Rights Certificate, together with all
right, title and interest therein, and does hereby irrevocably constitute and
appoint __________________ Attorney, to transfer the within Rights Certificate
on the books of the within-named Company, with full power of substitution.

                                      B-3
<PAGE>

         Dated as of ___________________, ____.

                                                     ___________________________
                                                        Signature

Signature Guaranteed:

         Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of NASD Regulation, Inc., or a commercial bank or
trust company having an office or correspondent in the United States.

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

         [To be executed if statement is correct]

         The undersigned hereby certifies that the Rights evidenced by this
Rights Certificate are not beneficially owned by an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement).

                                                     ___________________________
                                                        Signature

            [Form of Reverse Side of Rights Certificate -- continued]

                          FORM OF ELECTION TO PURCHASE
                      (To be executed if holder desires to
                        exercise the Rights Certificate)

                                TO SYMBION, INC.

         The undersigned hereby irrevocably elects to exercise _____________
Rights represented by this Rights Certificate to purchase the Preferred Shares
(or other securities) issuable upon the exercise of such Rights and requests
that certificates for such Preferred Shares (or other securities) be issued in
the name of:

                                      B-4
<PAGE>

Please insert social security or other identifying number:

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

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

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

Please insert social security or other identifying number:

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

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

Dated as of _____________, ____.

                                                     ___________________________
                                                        Signature

            [Form of Reverse Side of Rights Certificate -- continued]

Signature Guaranteed:

         Signatures must be guaranteed by a member firm of a registered national
securities exchange, a member of NASD Regulation, Inc., or a commercial bank or
trust company having an office or correspondent in the United States.

--------------------------------------------------------
         [To be executed if statement is correct]

         The undersigned hereby certifies that the Rights evidenced by this
Rights Certificate are not beneficially owned by an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement).

                                                     ___________________________
                                                        Signature

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

                                      B-5
<PAGE>

                                     NOTICE

         The signature in the foregoing Form of Assignment or Form of Election
to Purchase must conform 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 or the Form of Election to Purchase, as the case may be, is not
completed, the Company and the Rights Agent will deem the beneficial owner of
the Rights evidenced by this Rights Certificate to be an Acquiring Person or an
Affiliate or Associate thereof (as defined in the Rights Agreement) and such
Assignment or Election to Purchase will not be honored.

                                      B-6
<PAGE>

                                    EXHIBIT C

                          SUMMARY OF RIGHTS TO PURCHASE

                                 PREFERRED STOCK

         On _____________, 200_, the Board of Directors of Symbion, Inc. (the
"Company"), authorized the issuance of one preferred share purchase right (a
"Right") with respect to each outstanding share of common stock, $.01 par value
(the "Common Shares"), of the Company. The rights were issued on ____________,
200_ to the holders of record of Common Shares on that date. Each Right entitles
the registered holder to purchase from the Company one one-thousandth of a share
of Series A Junior Participating Preferred Stock, $.01 par value (the "Preferred
Shares"), of the Company at a price of $____ per one one-thousandth of a
Preferred Share (the "Purchase Price"), subject to adjustment. The description
and terms of the Rights are set forth in a Rights Agreement (the "Rights
Agreement") dated as of ____________, 200_, between the Company and SunTrust
Bank, as Rights Agent (the "Rights Agent").

         DETACHMENT OF RIGHTS; EXERCISE. Initially, the Rights will attach to
all Common Share certificates representing outstanding shares and no separate
Rights Certificate will be distributed. The Rights will separate from the Common
Shares and a "Distribution Date" will occur upon close of Business (as defined
in the Rights Agreement) on the earlier of (i) 10 business days following a
public announcement that a person or group of affiliated or associated persons
has become an Acquiring Person, or (ii) 10 business days following the
commencement or announcement of an intention to commence a tender offer or
exchange offer the consummation of which would result in a person or group
becoming an Acquiring Person, subject to the right of the Board of Directors to
defer the occurrence of a Distribution Date upon the occurrence of an event
described in this clause (ii).

         In general, a person becomes an Acquiring Person if such person or a
group of which such person is a member becomes the beneficial owner of 15% or
more of the Company's outstanding common stock.

         Until the Distribution Date (or earlier redemption or expiration of the
Rights) (i) the Rights will be evidenced with respect to any of the Common
Shares outstanding on ______________, 200_, by the certificates representing
such Common Shares with a copy of this Summary of Rights attached thereto, (ii)
the Rights will be transferred with and only with the Common Shares, (iii) new
Common Share certificates issued after ______________, 200_, upon transfer or
new issuance of the Common Shares will contain a notation incorporating the
Rights Agreement by reference, and (iv) the surrender for transfer of any
certificates for Common Shares outstanding as of ______________, 200_, even
without such notation or a copy of this Summary of Rights being attached
thereto, will also constitute the transfer of the Rights associated with the
Common Shares represented by such certificate.

         As soon as practicable following the Distribution Date, separate
certificates evidencing the Rights (the "Rights Certificates") will be mailed to
holders of record of the Common Shares as of the close of business on the
Distribution Date and such separate Rights Certificates alone will thereafter
evidence the Rights.

                                      C-1
<PAGE>

         The Rights are not exercisable until the Distribution Date. The Rights
will expire on ____________, 201_ (the "Final Expiration Date"), unless the
Final Expiration Date is extended or the Rights are earlier redeemed or
exchanged by the Company as described below.

         If a person or group were to become an Acquiring Person, then each
Right then outstanding (other than Rights beneficially owned by the Acquiring
Person which would become null and void) would become a right to buy that number
of Common Shares (or under certain circumstances, the equivalent number of one
one-thousandths of a Preferred Share or other assets or securities of the
Company) that at the time of such acquisition would have a market value of two
times the Purchase Price of the Right.

         At any time after a person or group of affiliated or associated persons
becomes an Acquiring Person, if the Company were acquired in a merger or other
business combination transaction or more than 50% of its consolidated assets or
earning power were sold, proper provision will be made so that each holder of a
Right will thereafter have the right to receive, upon the exercise thereof at
the then current Purchase Price of the Right, that number of shares of common
stock of the acquiring company which at the time of such transaction would have
a market value of two times the Purchase Price of the Right.

         PREFERRED SHARES. The dividend and liquidation rights, and the
non-redemption feature, of the Preferred Shares are designed so that the value
of one one-thousandth of a Preferred Share purchasable upon exercise of each
Right will approximate the value of one Common Share. The Preferred Shares
issuable upon exercise of the Rights will be non-redeemable and rank junior to
all other series of the Company's preferred stock. Each whole Preferred Share
will be entitled to receive a quarterly preferential dividend in an amount per
share equal to the greater of (i) $1.00 in cash, or (ii) in the aggregate, 1,000
times the dividend declared on each Common Share. In the event of liquidation,
the holders of the Preferred Shares will be entitled to receive a preferential
liquidation payment equal to the greater of (i) $1,000 per share, or (ii) in the
aggregate, 1,000 times the payment made on each Common Share. In the event of
any merger, consolidation or other transaction in which Common Shares are
exchanged for or changed into other stock or securities, cash or other property,
each whole Preferred Share will be entitled to receive 1,000 times the amount
received per Common Share. Each whole Preferred Share shall be entitled to 1,000
votes on all matters submitted to a vote of the stockholders of the Company, and
Preferred Shares shall generally vote together as one class with the Common
Stock and any other capital stock entitled to vote thereon on all matters
submitted to a vote of stockholders of the Company.

         The offer and sale of the Preferred Shares issuable upon exercise of
the Rights will be registered with the Securities and Exchange Commission and
such registration will not be effective until the Rights become exercisable.

         ANTIDILUTION AND OTHER ADJUSTMENTS. The number of one one-thousandths
of a Preferred Share or other securities or property issuable upon exercise of
the Rights, and the Purchase Price payable, are subject to customary adjustments
from time to time to prevent dilution.

                                      C-2
<PAGE>

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

         EXCHANGE OPTION. At any time after a person or group of affiliated or
associated persons has become an Acquiring Person and before the acquisition by
a person or group of 50% or more of the outstanding Voting Shares, the Board of
Directors may, at its option, issue Common Shares (or Preferred Shares) in
mandatory redemption of, and in exchange for, all or part of the then
outstanding and exercisable Rights (other than Rights owned by such person or
group which would become null and void) at an exchange ratio of one Common Share
(or one one-thousandth of a Preferred Share) for each two Common Shares for
which each Right then outstanding is then exercisable, subject to adjustment.

         REDEMPTION OF RIGHTS. At any time prior to the time that a person or
group has become an Acquiring Person, the Board of Directors of the Company may
redeem all but not less than all the then outstanding Rights at a price of
$0.00001 per Right (the "Redemption Price"). The redemption of the Rights may be
made effective at such time, on such basis and with such conditions as the Board
of Directors in its sole discretion may establish. Immediately upon the action
of the Board of Directors ordering redemption of the Rights, the right to
exercise the Rights will terminate and the only right of the holders of Rights
will be to receive the Redemption Price.

         NO RIGHTS AS STOCKHOLDER. 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.

         AMENDMENT OF RIGHTS. The terms of the Rights may be amended by the
Board of Directors of the Company without the consent of the holders of the
Rights, including an amendment to extend the Final Expiration Date, and,
provided a Distribution Date has not occurred, to extend the period during which
the Rights may be redeemed, except that after the first public announcement that
a person or group has become an Acquiring Person, no such amendment may
materially and adversely affect the interests of the holders of the Rights other
than the Acquiring Person and transferees of the Acquiring Person.

         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.

         A copy of the Rights Agreement has been filed with the Securities and
Exchange Commission as an Exhibit to a Registration Statement on Form 8-A dated
_________________, 200_. A copy of the Rights Agreement is available free of
charge from the Company.

                                      C-3