BANCFIRST CORP /OK/
8-A12G/A, 1998-07-24
NATIONAL COMMERCIAL BANKS
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<PAGE>
 
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549


                                  FORM 8-A/A


                                AMENDMENT NO. 1

                               AMENDING FORM 8-A
                            FILED FEBRUARY 26, 1993
                                        
               FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES
                    PURSUANT TO SECTION 12(b) OR (g) OF THE
                        SECURITIES EXCHANGE ACT OF 1934


                     _____________________________________


                             BANCFIRST CORPORATION

            (Exact name of registrant as specified in its charter)



                OKLAHOMA                                 73-1221379
    (State or other Jurisdiction of                   (I.R.S. Employer
     incorporation or organization)                  Identification No.)



              101 N. Broadway, Suite 200, Oklahoma City, Oklahoma
                                  73102-8401
                   (Address of principal executive offices)
                                  (Zip Code)



                                (405) 270-1086
             (Registrant's telephone number, including area code)


                     _____________________________________


                    SECURITIES TO BE REGISTERED PURSUANT TO
                           SECTION 12(b) OF THE ACT

                                     NONE

                    SECURITIES TO BE REGISTERED PURSUANT TO
                           SECTION 12(g) OF THE ACT



          Title of each class            Name of each exchange on which
          To be so registered            each class is to be registered
          -------------------            ------------------------------

     Common Stock, par value $1.00       NASDAQ National Market System
               per share




<PAGE>
 
     Form 8-A/A, Amendment No. 1, is hereby filed by the Registrant, BancFirst
Corporation  (the "Company" or the "Corporation") to supplement and amend the
information set forth in the Registration Statement on Form 8-A filed on
February 26, 1993 by the Company as follows:

Item 1.        Description of Registrant's Securities to be Registered:


     The description of the Company's $1.00 par value common stock ("Common
Stock") previously registered is amended to reflect that the Board of Directors
of the Company authorized an amendment to the Company's Certificate of
Incorporation and, on June 15, 1998, the stockholders approved such amendment at
the annual stockholders' meeting.  Pursuant to such vote, the Company's
stockholders amended the Company's Certificate of Incorporation to:

     (i)    provide for the classification of the Company's Board of Directors
into three classes of directors serving staggered terms;

     (ii)   provide that stockholders may adopt, amend or repeal the Bylaws of
the Company only by the affirmative vote of at least 66 2/3% of the then-
outstanding capital stock entitled to vote for the election of directors;

     (iii)  limit the stockholders' ability to change the provisions of the
Company's Certificate of Incorporation, contemplated by (i) and (ii), above, by
requiring an affirmative vote of at least 66 2/3% of the then-outstanding
capital stock entitled to vote for the election of directors; and

     (iv)   adopt a "Fair Price Amendment" which requires that certain minimum
price and procedural requirements be observed by any party that acquires 15% or
more of the Company's Common Stock and then seeks to accomplish a merger or
other business combination or transaction that would eliminate or could
significantly change the interests of the remaining stockholders, unless
approved by a majority of Continuing Directors (as defined in the Certificate of
Incorporation).  If the requirements of the Fair Price Amendment are not
observed by such an acquiring party, an increased stockholder vote would be
required as a condition for a subsequent Business Combination (as defined in the
Certificate of Incorporation).  Specifically, the Fair Price Amendment requires
the affirmative vote of the holders of 66 2/3% of the shares of Common Stock
outstanding, including the affirmative vote of the holders of at least 66 2/3%
of the voting power of the then issued and voting stock not held by the
Interested Stockholder (as defined in the Certificate of Incorporation), to
approve a Business Combination involving an Interested Stockholder, except in
cases in which either certain price criteria and procedural requirements are
satisfied or the transaction is approved by a majority of the Continuing
Directors.  In the event the procedural requirements were to be met or the
requisite approval of the Board of Directors were to be given with respect to a
particular Business Combination, the normal requirements of Oklahoma Law would
apply and, accordingly, the affirmative vote of the holders of only a majority
of the outstanding shares of Commons Stock entitled to vote would be required,
or, for certain transactions, no stockholder vote would be necessary.

     The specific language of the amendments to the Certificate of Incorporation
is as set forth below:

                                       1
<PAGE>
 
     Article 7 of the Certificate of Incorporation of the Company was amended by
inserting a new Section (A) to read as follows:


                                   ARTICLE 7
                                   ---------
                                        
     A.   The following provisions are inserted for the management of the
          business and for the conduct of the affairs of the Corporation and for
          defining and regulating the powers of the Corporation and its
          directors and stockholders and are in furtherance and not in
          limitation of the powers conferred upon the Corporation by statute:

          1.   NUMBER AND ELECTION OF DIRECTORS.  The powers of the Corporation
               shall be exercised by or under the authority of, and the business
               and affairs of the Corporation shall be managed by or under the
               direction of the Board of Directors.  Subject to such rights of
               holders of shares of one or more outstanding series of Preferred
               Stock to elect one or more directors of the Corporation under
               circumstances as shall be provided by or established pursuant to
               the Certificate of Incorporation, the number of directors of the
               Corporation that shall constitute the Board of Directors shall
               not be less than three (3) nor more than twenty-five (25) and
               shall be specified from time to time by resolution adopted by the
               affirmative vote of a majority of the directors in office at the
               time of adoption of such resolution.  Whenever the holders of any
               one or more classes or series of Preferred Stock issued by the
               Corporation shall have the right, voting separately by class or
               series, to elect directors at an Annual or Special Meeting of
               Stockholders, the election, term of office, filling of vacancies
               and other features of such directorships shall be governed by the
               terms of this Certificate of Incorporation, or the resolution or
               resolutions adopted by the board of directors creating such class
               or series, as the case may be, applicable thereto, and such
               directors so elected shall not be divided into classes pursuant
               to this Article unless expressly provided by such terms.

          2.   CLASSES AND TERMS OF DIRECTORS.  The Board of Directors shall be
               divided into 3 classes: Class I, Class II and Class III.  The
               terms of office of the directors initially classified shall be as
               follows: that of Class I shall expire at the next annual meeting
               of stockholders in 1999, Class II at the second succeeding annual
               meeting of stockholders in 2000, and Class III at the third
               succeeding annual meeting of the stockholders in 2001.  At each
               succeeding annual meeting of stockholders, successors to the
               class of directors whose terms expire at that annual meeting
               shall be elected for three-year terms.

               If the number of directors changes, any increase or decrease
               shall be apportioned among the classes so as to maintain the
               number of directors in each class as nearly equal as possible,
               and any additional director of any class

                                       2
<PAGE>
 
               elected to fill a vacancy resulting from an increase in such
               class shall hold office for a term that shall coincide with the
               remaining term of that class, but in no case will a decrease in
               the number of directors shorten the term of any incumbent
               director. A director shall hold office until the annual meeting
               for the year in which his or her term expires and until his or
               her successor shall be elected and shall qualify, subject,
               however, to prior death, resignation, retirement,
               disqualification or removal for cause from office.

          3.   VACANCIES.  Except as otherwise required by law, or by any
               provisions established pursuant to the Certificate of
               Incorporation with respect to the rights of holders of shares of
               one or more outstanding series of Preferred Stock, newly created
               directorships resulting from any increase in the authorized
               number of directors of the Corporation and any vacancies on the
               Board of Directors resulting from death, resignation, retirement,
               disqualification or removal for cause from office of a director
               of the Corporation shall be filled only by the affirmative vote
               of at least a majority of the remaining directors of the
               Corporation then in office, even if such remaining directors
               constitute less than a quorum of the Board of Directors, or by
               the sole remaining director.

          4.   REMOVAL.  Any director may be removed from office only for cause
               and only by the affirmative vote of not less than 66 2/3% of the
               then-outstanding shares of stock of the Corporation entitled to
               vote in the election of directors, voting together as a single
               class, given at a meeting of the stockholders for that purpose.


     Article 7 of the Certificate of Incorporation of the Company was also
amended by changing the prior Section (A) to become Section (B) and to read as
follows:

                                   ARTICLE 7
                                   ---------
                                        
     B.   The Board of Directors is expressly empowered to adopt, amend or
          repeal Bylaws of the Corporation.  The stockholders shall also have
          power to adopt, amend or repeal the Bylaws of the Corporation;
          provided, however, that, in addition to any vote of the holders of any
          class or series of stock of this Corporation required by law or by
          this Certificate of Incorporation, the affirmative vote of the holders
          of at least 66 2/3% of the voting power of all of the then-outstanding
          shares of the capital stock of the Corporation entitled to vote
          generally in the election of directors, voting together as a single
          class, shall be required to adopt, amend or repeal any provisions of
          the Bylaws of the Corporation.


     A new Article 9 was also added to the Certificate of Incorporation to read
as follows:

                                       3
<PAGE>
 
                                   ARTICLE 9
                                   ---------

                       BUSINESS COMBINATIONS; FAIR PRICE

     A.   In addition to any affirmative vote required by law or this
          Certificate of Incorporation, and except as otherwise expressly
          provided in paragraph B of this Article 9:

          1.   any merger or consolidation of the Corporation or any Subsidiary
               (as hereinafter defined) with (a) any Interested Stockholder (as
               hereinafter defined), or (b) any other corporation, partnership
               or other entity (whether or not itself an Interested Stockholder)
               which is, or after such merger or consolidation would be, an
               Affiliate (as hereinafter defined) of an Interested Stockholder;
               or

          2.   any sale, lease, exchange, mortgage, pledge, transfer or other
               disposition (in one transaction or a series of transactions) to
               or with any Interested Stockholder, including all Affiliates of
               the Interested Stockholder, of any assets of the Corporation or
               any Subsidiary; or

          3.   the issuance or transfer by the Corporation or any Subsidiary (in
               one transaction or a series of transactions) of any securities of
               the Corporation or any Subsidiary to any Interested Stockholder,
               including all Affiliates of the Interested Stockholder, in
               exchange for cash, securities or other property (or a combination
               thereof), other than on a pro rata basis to all holders of Voting
               Stock of the same class held by the Interested Stockholder
               pursuant to a stock split, stock dividend or distribution of
               warrants or rights and other than in connection with the exercise
               or conversion of securities exercisable for or convertible into
               securities of the Corporation or any of its subsidiaries which
               securities have been distributed pro rata to all holders of
               Voting Stock; or

          4.   the adoption of any plan or proposal for the liquidation or
               dissolution of the Corporation proposed by or on behalf of an
               Interested Stockholder or any Affiliates of an Interested
               Stockholder; or

          5.   any reclassification of securities (including any reverse stock
               split), or recapitalization of the Corporation, or any merger or
               consolidation of the Corporation with any of its Subsidiaries or
               any other transaction (whether or not an Interested Stockholder
               is a party thereto) which has the effect, directly or indirectly,
               of increasing the proportionate share by more than one percent
               (1%) of the issued and outstanding shares of any class of equity
               or convertible securities of the Corporation or any Subsidiary
               which are directly or indirectly owned by any Interested
               Stockholder or one or more Affiliates of the Interested
               Stockholder;

                                       4
<PAGE>
 
          shall require the affirmative vote of the holders of at least 66 2/3%
          of the voting power of the then issued and outstanding Voting Stock,
          as hereinafter defined, voting together as a single class, including
          the affirmative vote of the holders of at least 66 2/3% of the voting
          power of the then issued and outstanding Voting Stock not Beneficially
          Owned directly or indirectly by an Interested Stockholder or any
          Affiliate of any Interested Stockholder.  Such affirmative vote shall
          be required notwithstanding the fact that no vote may be required, or
          that a lesser percentage may be permitted, by law or in any agreement
          with any national securities exchange or otherwise.

     B.   The provisions of Section A of this Article 9 shall not be applicable
          to any particular Business Combination (as hereinafter defined), and
          such Business Combination shall require only such affirmative vote as
          is required by law or any other provision of this Certificate of
          Incorporation, if the conditions specified in either of the following
          paragraph 1 or 2 are met:

          1.   the Business Combination shall have been approved by a majority
               of the Continuing Directors (as hereinafter defined); or

          2.   all of the following price and procedural conditions shall have
               been met:

               (a)  the aggregate amount of the cash and the Fair Market Value
                    (as hereinafter defined) as of the date of the consummation
                    of the Business Combination of consideration other than
                    cash, to be received per share by the holders of Common
                    Stock in such Business Combination, shall be at least equal
                    to the higher of the following:

                    (i)  (if applicable) the highest per share price (including
                         any brokerage commissions, transfer taxes and
                         soliciting dealers' fees) paid by the Interested
                         Stockholder for any shares of Common Stock acquired by
                         it (A) within the two (2) year period immediately prior
                         to the first public announcement of the proposal of
                         such Business Combination (the "Announcement Date"), or
                         (B) in the transaction in which it became an Interested
                         Stockholder, whichever is higher; and

                    (ii) the Fair Market Value per share of Common Stock on the
                         Announcement Date or on the date on which the
                         Interested Stockholder became an Interested Stockholder
                         (the "Determination Date"), whichever is higher. and

               (b)  after such Interested Stockholder has become an Interested
                    Stockholder and prior to the consummation of such Business
                    Combination:

                                       5
<PAGE>
 
                    (i)    there shall have been no failure to declare and pay
                           at the regular date therefor any full quarterly
                           dividends (whether or not cumulative) on any issued
                           and outstanding preferred stock, except as approved
                           by a majority of the Continuing Directors;

                    (ii)   there shall have been no reduction in the annual rate
                           of dividends paid on the Common Stock (except as
                           necessary to reflect any subdivision of the Common
                           Stock), except as approved by a majority of the
                           Continuing Directors;

                    (iii)  there shall have been an increase in the annual rate
                           of dividends as necessary fully to reflect any
                           recapitalization (including any reverse stock split),
                           reorganization or any similar reorganization which
                           has the effect of reducing the number of issued and
                           outstanding shares of the Common Stock, unless the
                           failure so to increase such annual rate is approved
                           by a majority of the Continuing Directors; and

                    (iv)   such Interested Stockholder shall not have become the
                           Beneficial Owner of any additional Voting Stock
                           except as part of the transaction which results in
                           such Interested Stockholder becoming an Interested
                           Stockholder; and

               (c)  the consideration to be received by holders of a particular
                    class of issued and outstanding Voting Stock (including
                    Common Stock and other than Preferred Stock with respect to
                    which a majority of the Continuing Directors have approved a
                    Preferred Stock Designation creating such series that
                    expressly provides that the provisions of this Article shall
                    not apply) shall be in cash or in the same form as the
                    Interested Stockholder has previously paid for shares of
                    such class of Voting Stock (if the Interested Stockholder
                    has paid for shares of any class of Voting Stock with
                    varying forms of consideration, the form of consideration
                    for such class of Voting Stock shall be either cash or the
                    form used to acquire the largest number of shares of such
                    class of Voting Stock previously acquired by it); and

               (d)  after such Interested Stockholder has become an Interested
                    Stockholder, such Interested Stockholder shall not have
                    received the benefit, directly or indirectly (except
                    proportionately as a stockholder), of any loans, advances,
                    guarantees, pledges or other financial assistance or any tax
                    credits or other tax advantages provided by the Corporation,
                    whether in anticipation of or in connection with such
                    Business Combination or otherwise; and

                                       6
<PAGE>
 
               (e)  a proxy or information statement describing the proposed
                    Business Combination and complying with the requirements of
                    the Securities Exchange Act of 1934 and the rules and
                    regulations thereunder (or any subsequent provisions
                    replacing such Act, rules or regulations) shall be mailed to
                    stockholders of the Corporation at least thirty (30) days
                    prior to the consummation of such Business Combination
                    (whether or not such proxy or information statement is
                    required to be marked pursuant to such Act or subsequent
                    provisions).

     C.   For purposes of this Article 9 the following terms shall have the
          following meanings:

          1.   "Affiliate" or "Associate" shall have the respective meanings
               ascribed to such terms in Rule 12b-2 of the General Rules and
               Regulations under the Securities Exchange Act of 1934.

          2.   "Beneficial Owner" shall have the meaning ascribed to such term
               in Rule 13d-3 of the General Rules and Regulations of the
               Securities Exchange Act of 1934.  In addition, a Person shall be
               the "Beneficial Owner" of any Voting Stock which such Person or
               any of its Affiliates or Associates has: (a) the right to acquire
               (whether such right is exercisable immediately or only after the
               passage of time), pursuant to any agreement, arrangement or
               understanding or upon the exercise of conversion rights, exchange
               rights, warrants or options, or otherwise; or (b) the right to
               vote pursuant to any agreement, arrangement or understanding (but
               neither such Person nor any such Affiliate or Associate shall be
               deemed to be the Beneficial Owner of any shares of Voting Stock
               solely by reason of a revocable proxy granted for a particular
               meeting of the stockholders, pursuant to a public solicitation of
               proxies for such meeting, and with respect to which shares
               neither such Person nor any such Affiliate or Associate is
               otherwise deemed the Beneficial Owner).

          3.   "Business Combination" shall mean any transaction described in
               any one or more of clauses (1) through (5) of Section A of this
               Article 9.

          4.   "Continuing Director" shall mean any member of the Board who is
               unaffiliated with and is not the Interested Stockholder and was a
               member of the Board prior to the time that the Interested
               Stockholder became an Interested Stockholder, and any director
               who is thereafter chosen to fill any vacancy on the Board or who
               is elected and who, in either event, is unaffiliated with the
               Interested Stockholder and in connection with his or her initial
               assumption of office is recommended for appointment or election
               by a majority of Continuing Directors then on the Board.

          5.   "Fair Market Value" shall mean: (a) in the case of stock, the
               highest closing sale price during the thirty (30) day period
               immediately preceding the date in

                                       7
<PAGE>
 
               question of a share of such stock on the Composite Tape for New
               York Stock Exchange listed stocks, or, if such stock is not
               quoted on the composite tape, on the New York Stock Exchange, or,
               if such stock is not listed on such exchange, on the principal
               United States securities exchange registered under the Securities
               Exchange Act of 1934 on which such stock is listed, or, if such
               stock is not listed on any such exchange, the highest closing bid
               quotation with respect to a share of such stock during the thirty
               (30) day period preceding the date in question on the National
               Association of Securities Dealers, Inc. Automated Quotation
               System or any system then in use in its stead, or if no such
               quotations are available, the fair market value on the date in
               question of a share of such stock as determined by the Board in
               accordance with Section D of this Article 9; and (b) in the case
               of property other than cash or stock, the fair market value of
               such property on the date in question as determined by the Board
               in accordance with Section D of this Article 9.

          6.   "Interested Stockholder" shall mean any Person to or which:

               (a)  itself, or along with its Affiliates, is the Beneficial
                    Owner, directly or indirectly, of more than fifteen percent
                    (15%) of the then issued and outstanding Voting Stock; or

               (b)  is an Affiliate of the Corporation and at any time within
                    the two (2) year period immediately prior to the date in
                    question was itself, or along with its Affiliates, the
                    Beneficial Owner, directly or indirectly, of fifteen percent
                    (15%) or more of the then issued and outstanding Voting
                    Stock; or

               (c)  is an assignee of or has otherwise succeeded to any Voting
                    Stock which was at any time within the two (2) year period
                    immediately prior to the date in question beneficially owned
                    by an Interested Stockholder, if such assignment or
                    succession shall have occurred in the course of a
                    transaction or series of transactions not involving a public
                    offering within the meaning of the Securities Act of 1933.

               For the purpose of determining whether a Person is an Interested
               Stockholder pursuant to paragraph 6 of this Section C, the number
               of shares of Voting Stock deemed to be issued and outstanding
               shall include shares deemed owned through application of
               paragraph 2 of this Section C but shall not include any other
               shares of Voting Stock that may be issuable pursuant to any
               agreement, arrangement or understanding, or upon exercise of
               conversion rights, warrants or options or otherwise.

               Notwithstanding anything to the contrary contained in this
               Certificate of Incorporation, for purposes of this Certificate of
               Incorporation, the term "Interested Stockholder" shall not, for
               any purpose, include, and the

                                       8
<PAGE>
 
               provisions of Article 9(A) hereof shall not apply to: (a) the
               Corporation or any Subsidiary; (b) any employee stock ownership
               plan of the Corporation or any Subsidiary; or (c) any individual,
               corporation, partnership or other person, entity or group which
               "beneficially owned" on April 23, 1998, 15% or more of the
               outstanding Common Stock of the Corporation.

          7.   In the event of any Business Combination in which the Corporation
               survives, the phrase "other consideration to be received" as used
               in paragraph B of this Article 9 shall include the shares of
               Common Stock and/or the shares of any other class of issued and
               outstanding Voting Stock retained by the holders of such shares.

          8.   "Person" shall mean any individual, firm, corporation,
               partnership or other entity.

          9.   "Subsidiary" shall mean any corporation or other entity of which
               the Corporation owns, directly or indirectly, securities that
               enable the Corporation to elect a majority of the board of
               directors or other persons performing similar functions of such
               corporation or entity or that otherwise give to the Corporation
               the power to control such corporation or entity.

          10.  "Voting Stock" means all issued and outstanding shares of capital
               stock of the Corporation that pursuant to or in accordance with
               this Certificate of Incorporation are entitled to vote generally
               in the election of directors of the Corporation, and each
               reference herein, where appropriate, to a percentage or portion
               of shares of Voting Stock shall refer to such percentage or
               portion of the voting power of such shares entitled to vote.  The
               issued and outstanding shares of Voting Stock shall not include
               any shares of Voting Stock that may be issuable pursuant to any
               agreement, or upon the exercise or conversion of any rights,
               warrants or options or otherwise.

     D.   The Continuing Directors of the Corporation shall have the power and
          duty to determine for the purposes of this Article 9, on the basis of
          information known to them after reasonable inquiry, all facts
          necessary to determine compliance with this Article 9, including,
          without limitation:

          (i)    whether a Person is an Interested Stockholder;

          (ii)   the number of shares of Voting Stock beneficially owned by any
                 Person;

          (iii)  whether a Person is an Affiliate or Associate of another;

          (iv)   whether the applicable conditions set forth in paragraph 2 of
                 paragraph B of this Article 9 have been met with respect to any
                 Business Combination;

                                       9
<PAGE>
 
          (v)    the Fair Market Value of stock or other property in accordance
                 with paragraph 6 of paragraph C of this Article 9.

     E.   Nothing contained in this Article 9 shall be construed to relieve any
          Interested Stockholder from any fiduciary obligation imposed by law.

     F.   In addition to any affirmative vote required by applicable law and in
          addition to any vote of the holders of any series of Preferred Stock
          provided for or fixed pursuant to the provisions of Article 5 of this
          Certificate of Incorporation, any alteration, amendment or repeal
          relating to this Article 9 must be approved by the affirmative vote of
          the holders of at least 66 2/3% of the combined voting power of the
          issued and outstanding shares of Voting Stock, voting together as a
          single class.


     Finally, a new Article 10 was added to the Certificate of Incorporation to
read as follows:

                                  ARTICLE 10
                                  ----------
                                        
               Article 7, Sections (A) and (B), of the Certificate of
     Incorporation may be (and may only be) amended by the affirmative vote
     of the holders of at least 66 2/3% of the voting power of all of the
     then-outstanding shares of the capital stock of the Corporation entitled to
     vote generally in the election of directors, voting together as a single
     class.


Item 2.    Exhibits.

     Exhibit 1.  Second Amended and Restated Certificate of Incorporation of
                 BancFirst Corporation, filed July 24, 1998.



                                   SIGNATURE

          Pursuant to the requirements of Section 12 of the Securities Exchange
Act of 1934, the Registrant has duly caused this Registration Statement on Form
8-A/A, Amendment No. 1, to be signed on its behalf by the undersigned, thereto
duly authorized.

Date:  July 24, 1998          BANCFIRST CORPORATION

                              By:  /s/ Joe T. Shockley
                                  --------------------------------------------
                              Joe T. Shockley
                              Executive Vice President and
                              Chief Financial Officer

                                       10

<PAGE>
 
                                                                       EXHIBIT 1
                          SECOND AMENDED AND RESTATED
                          CERTIFICATE OF INCORPORATION
                            OF BANCFIRST CORPORATION
                                        

TO THE SECRETARY OF STATE OF OKLAHOMA:


     BancFirst Corporation, which was originally incorporated in the State of
Oklahoma under the name United Community Corporation by filing its original
Articles of Incorporation with the Secretary of State of Oklahoma on July 12,
1984, hereby further amends and restates its Certificate of Incorporation in
accordance with a resolution adopted by the Board of Directors of this
Corporation and approved by the shareholders on June 15, 1998, all in accordance
with Sections 1077 and 1080 of Title 18 of the Oklahoma General Corporation Act,
Okla. Stat. tit. 18, (S)1001 et seq. (the "Oklahoma General Corporation Act"),
to read in full as follows.


                                   ARTICLE 1
                                        

     The name of the Corporation is:  BancFirst Corporation.


                                   ARTICLE 2


     The address of its registered office in the State of Oklahoma is 101 North
Broadway, Suite 200, Oklahoma City, Oklahoma  73102, and the name of its
registered agent at such address is Randy P. Foraker.


                                   ARTICLE 3
                                        

     The period of existence of this Corporation shall be perpetual.


                                   ARTICLE 4
                                        

     The purposes for which this Corporation is formed are:

     To subscribe or cause to be subscribed for, and to take, purchase and
otherwise acquire, own, hold, use, sell, assign, transfer, exchange, distribute
and otherwise dispose of, the whole or any part of the shares of the capital
stock, bonds, coupons, mortgages, deeds of trust, debentures, securities,
obligations, evidences of indebtedness, notes, good will, rights, assets and
property of any and every kind, or any part thereof, together with the shares,
rights, units or interests in or in respect of any trust estate, now or
hereafter existing, and whether created by the laws of the State of Oklahoma or
of any other state, territory or county; and to operate, manage and control such
properties, or any of them, either in the name of such other corporation or
corporations or in the name of this Corporation, and while the owner of any of
said shares of capital stock, to exercise all of the rights, powers, and
privileges of ownership of every kind and description, including the right to
vote thereon with power to designate some person or persons for that purpose
from time to time and to the same extent as natural persons might or could do.
<PAGE>
 
     To acquire, by purchase or otherwise, the good will, business, property
rights, franchises and assets of every kind, with or without undertaking, either
wholly or in part, the liabilities of any person, firm, association or
corporation; and to acquire any property or business as a going concern or
otherwise: (a) by purchase of the assets thereof wholly or in part; (b) by
acquisition of the shares or any part thereof; or (c) in any other manner and to
pay for the same in cash or in the shares or bonds or other evidences of
indebtedness of this Corporation, or otherwise; to hold, maintain and operate,
or in any manner dispose of the whole or any part of the good will, business
rights and property so acquired and to conduct in any lawful manner, the whole
or any part of any business so acquired; and to exercise all of the powers
necessary or convenient in and about the management of such business.

     From time to time to apply for, purchase, acquire by assignment, transfer
or otherwise, exercise, carry out and enjoy any benefit, right, privilege,
prerogative or power conferred by, acquired under or granted by any statute,
ordinance, order, license, power, government or authority or governmental agency
or corporation or other public body that may be empowered to enact, make or
grant; to pay for, aid in, and contribute toward carrying the same into effect;
and to appropriate any of this Corporation's shares, bonds and/or assets to
defray the costs, charges and expenses thereof.  To borrow and lend money and to
make all necessary contracts either to borrow or to loan money, and to secure to
take security for the same as the Corporation may desire.

     To issue bonds, notes, debentures, or other obligations of this Corporation
from time to time for any of the objects or purposes of this Corporation, and to
secure the same by mortgage, deed of trust, pledge or otherwise, or to issue the
same unsecured; to purchase or otherwise acquire its own bonds, debentures, or
other evidences of its indebtedness or obligations; to purchase, hold, sell,
transfer and reissue shares of its own capital stock to the extent and in the
manner provided by the laws of the State of Oklahoma as the same are now in
force or may hereafter be amended.

     To engage in any lawful act or activity and to pursue any lawful purpose
for which a corporation may be formed under the Oklahoma General Corporation
Act.

     To engage in and conduct any lawful business for profit at such places and
in such manner as its directors shall determine, and in so doing enter into any
general, special or limited partnership as a general, special or limited
partner; or into any association or arrangement for sharing profits, union of
interest, reciprocal concessions or transactions capable of being conducted so
as to benefit, directly or indirectly, the Corporation.

     To raise or procure funds from other individuals, firms, associations or
corporations to be invested in any business in which this Corporation might
engage, for and on behalf of the parties investing such funds as individual
owners or in one or more joint ventures, general partnerships, limited
partnerships, syndicates or other associations or other corporations, whether
the corporation is or is not a co-owner, joint venturer, associate, partner or
shareholder in the business in which such funds are levied.

     To guarantee, co-sign and be surety for the debts, dues and obligations of
its subsidiaries, affiliates, parent corporations, shareholders, partners,
whether general, special or limited, joint 

                                      -2-
<PAGE>
 
co-ventures, co-tenants, and any other persons, firms or corporations, the
obtaining of a loan commitment or contract by which will beneficially affect
this Corporation or its shareholders; provided, it shall not be the purpose of
this Corporation to transact a business of insurance or to do any act prohibited
by law to a business corporation.

     The objects and purposes specified in the foregoing clauses shall, except
where otherwise expressed, be in no wise limited or restricted by reference to,
or inference from the terms of any other clause in this or any other article of
this Amended and Restated Certificate of Incorporation, but the objects and
purposes specified in each of the foregoing clauses of this article shall be
regarded as independent powers as well as objects and purposes and the
enumeration of specific powers, objects and purposes is in addition to and not
in limitation of the powers conferred by the provisions of the Oklahoma General
Corporation Act.


                                   ARTICLE 5

A.  The aggregate number of shares of all classes which the Corporation shall
have authority to allot is 18,400,000.  The designation of each class, the
number of shares of each class, the par value of each class and the total
authorized capital of the Corporation are as follows:


                                     NUMBER OF         PAR       TOTAL PAR VALUE
            CLASS                     SHARES          VALUE         AUTHORIZED
- --------------------------------    ----------      ---------    ---------------
Senior Preferred Stock              10,000,000         $1.00       $10,000,000
10% Cumulative Preferred Stock         900,000         $5.00         4,500,000
Common Stock                         7,500,000         $1.00         7,500,000
                                     ---------                       ---------
     Total                          18,400,000                     $22,000,000
                                    ==========                     ===========

B.  Senior Preferred Stock:

     1.  The Senior Preferred Stock may be issued from time to time in one or
     more series with such designation for each such series as shall be stated
     and expressed in the resolution or resolutions providing for the issue of
     each such series adopted by the Board of Directors. The Board of Directors
     in any such resolution or resolutions is expressly authorized to state and
     express for each such series:

          (a) The number of shares constituting that series;

          (b) The voting powers, if any, of the holders of stock of such series;

          (c) The rate per annum and the times at and conditions upon which the
          holders of stock of such series shall be entitled to receive
          dividends, and whether such dividends shall be cumulative or
          noncumulative and if cumulative the terms upon which such dividends
          shall be cumulative;

                                      -3-
<PAGE>
 
          (d) The price or prices and the time or times at and the manner in
          which the stock of such series shall be redeemable;

          (e) The rights to which the holders of the shares of stock of such
          series shall be entitled upon any voluntary or involuntary
          liquidation, dissolution or winding up of the Corporation;

          (f) The terms, if any, upon which shares of stock of such series shall
          be convertible into, or exchangeable for, shares of stock of any other
          class or classes or of any other series of the same or any other class
          or classes, including the price or prices or the rate or rates of
          conversion or exchange and the terms of adjustment, if any; and

          (g) Any other powers, designations, preferences and relative,
          participating, optional, or other special rights, and qualifications,
          limitations or restrictions thereof which shall not be inconsistent
          with the laws of Oklahoma or with the provisions of this Amended and
          Restated Certificate of Incorporation.

     2.  Shares of any series of Senior Preferred Stock which have been redeemed
     (whether through the operation of a sinking fund or otherwise) or which, if
     convertible or exchangeable, have been converted into or exchanged for
     shares of stock of any other class or classes shall have the status of
     authorized and unissued shares of Senior Preferred Stock of the same series
     and may be reissued as a part of the series of which they were originally a
     part or may be reclassified and reissued as part of a new series of Senior
     Preferred Stock to be created by resolution or resolutions of the Board of
     Directors or as part of any other series of Senior Preferred Stock, all
     subject to the conditions and the restrictions on issuance set forth in the
     resolution or resolutions adopted by the Board of Directors providing for
     the issue of any series of Preferred Stock.

C.   10% Cumulative Preferred Stock:

     The 10% Cumulative Preferred Stock ("10% Preferred Stock") of the
Corporation shall be entitled to receive dividends at the annual rate of 10%,
which dividends shall be cumulative and payable semi-annually in January and
July on the fifteenth day of such months for dividends accrued as of the end of
the month next preceding the date of payment out of the earnings of the
Corporation and in preference to any dividends upon the Common Stock.  No cash
dividends shall be paid upon the Common Stock if the payment of dividends on 10%
Preferred Stock shall be in arrears.  In the case of liquidation or dissolution
of the Corporation, the holders of 10% Preferred Stock shall be entitled to be
paid in full both the par value of such shares and the dividends accrued but
unpaid before any amount shall be paid to the holders of the Common Stock.  The
shares of 10% Preferred Stock shall not be subject to conversion into any other
securities of the Corporation.  The shares of 10% Preferred Stock are subject to
redemption at the option of the Corporation, in whole or in part, upon payment
of the par value thereof and accrued dividends.  10% Preferred Stock shall have
no voting rights, except as otherwise required by law.

                                      -4-
<PAGE>
 
D.   Common Stock:

     Each share of Common Stock of the Corporation shall be equal in all
respects to each other share of Common Stock. The holders of Common Stock shall
be entitled to one vote for each share of Common Stock held with respect to all
matters as to which the Common Stock is entitled to vote. The Common Stock shall
be subject to the prior rights of 10% Cumulative Preferred Stock and the Senior
Preferred Stock as declared in this Article Five.


                                   ARTICLE 6

     Whenever a compromise or arrangement is proposed between this Corporation
and its creditors or any class of them and/or between this Corporation and its
shareholders or any class of them, any court of equitable jurisdiction within
the State of Oklahoma may, on the application in a summary way of this
Corporation or of any creditor or shareholder thereof or on the application of
any receiver or receivers appointed for this Corporation under the provisions of
Section 1106 of the Oklahoma General Corporation Act or on the application of
trustees in dissolution or of any receiver or receivers appointed for this
Corporation under the provisions of Section 1100 of the Oklahoma General
Corporation Act, order a meeting of the creditors or class of creditors, and/or
of the shareholders or class of shareholders of this Corporation, as the case
may be, to be summoned in such manner as the said court directs.  If a majority
in number representing three-fourths in value of the creditors or class of
creditors, and/or of the shareholders or class of shareholders of this
Corporation, as the case may be, agree to any compromise or arrangement and to
any reorganization of this Corporation as a consequence of such compromise or
arrangement, the said compromise or arrangement and the said reorganization
shall, if sanctioned by the court to which the said application has been made,
be binding on all the creditors or class of creditors, and/or on all the
shareholders or class of shareholders, of this Corporation, as the case may be,
and also on this Corporation.


                                   ARTICLE 7

A.   The following provisions are inserted for the management of the business
and for the conduct of the affairs of the Corporation and for defining and
regulating the powers of the Corporation and its directors and stockholders and
are in furtherance and not in limitation of the powers conferred upon the
Corporation by statute:


     1.  NUMBER AND ELECTION OF DIRECTORS.  The powers of the Corporation shall
     be exercised by or under the authority of, and the business and affairs of
     the Corporation shall be managed by or under the direction of the Board of
     Directors.  Subject to such rights of holders of shares of one or more
     outstanding series of Preferred Stock to elect one or more directors of the
     Corporation under circumstances as shall be provided by or established
     pursuant to the Certificate of Incorporation, the number of directors of
     the Corporation that shall constitute the Board of Directors shall not be
     less than three (3) nor more than twenty-five (25) and shall be specified
     from time to time by resolution adopted by the affirmative vote of a
     majority of the directors in office at the time of adoption of such
     resolution.  

                                      -5-
<PAGE>
 
     Whenever the holders of any one or more classes or series of Preferred
     Stock issued by the Corporation shall have the right, voting separately by
     class or series, to elect directors at an Annual or Special Meeting of
     Stockholders, the election, term of office, filling of vacancies and other
     features of such directorships shall be governed by the terms of this
     Certificate of Incorporation, or the resolution or resolutions adopted by
     the Board of Directors creating such class or series, as the case may be,
     applicable thereto, and such directors so elected shall not be divided into
     classes pursuant to this Article unless expressly provided by such terms.

     2.  CLASSES AND TERMS OF DIRECTORS.  The Board of Directors shall be
     divided into 3 classes: Class I, Class II and Class III.  The terms of
     office of the directors initially classified shall be as follows: that of
     Class I shall expire at the next annual meeting of stockholders in 1999,
     Class II at the second succeeding annual meeting of stockholders in 2000,
     and Class III at the third succeeding annual meeting of the stockholders in
     2001.  At each succeeding annual meeting of stockholders, successors to the
     class of directors whose terms expire at that annual meeting shall be
     elected for three-year terms.

     If the number of directors changes, any increase or decrease shall be
     apportioned among the classes so as to maintain the number of directors in
     each class as nearly equal as possible, and any additional director of any
     class elected to fill a vacancy resulting from an increase in such class
     shall hold office for a term that shall coincide with the remaining term of
     that class, but in no case will a decrease in the number of directors
     shorten the term of any incumbent director.  A director shall hold office
     until the annual meeting for the year in which his or her term expires and
     until his or her successor shall be elected and shall qualify, subject,
     however, to prior death, resignation, retirement, disqualification or
     removal for cause from office.

     3.  VACANCIES.  Except as otherwise required by law, or by any provisions
     established pursuant to the Certificate of Incorporation with respect to
     the rights of holders of shares of one or more outstanding series of
     Preferred Stock, newly created directorships resulting from any increase in
     the authorized number of directors of the Corporation and any vacancies on
     the Board of Directors resulting from death, resignation, retirement,
     disqualification or removal for cause from office of a director of the
     Corporation shall be filled only by the affirmative vote of at least a
     majority of the remaining directors of the Corporation then in office, even
     if such remaining directors constitute less than a quorum of the Board of
     Directors, or by the sole remaining director.

     4.  REMOVAL.  Any director may be removed from office only for cause and
     only by the affirmative vote of not less than 66 2/3% of the then-
     outstanding shares of stock of the Corporation entitled to vote in the
     election of directors, voting together as a single class, given at a
     meeting of the stockholders for that purpose.

B.   The Board of Directors is expressly empowered to adopt, amend or repeal
Bylaws of the Corporation.  The stockholders shall also have power to adopt,
amend or repeal the Bylaws of the Corporation; provided, however, that, in
addition to any vote of the holders of any class or series of stock of this
Corporation required by law or by this Certificate of Incorporation, the
affirmative vote 

                                      -6-
<PAGE>
 
of the holders of at least 66 2/3% of the voting power of all of the then-
outstanding shares of the capital stock of the Corporation entitled to vote
generally in the election of directors, voting together as a single class, shall
be required to adopt, amend or repeal any provisions of the Bylaws of the
Corporation.

C.  A director of the Corporation shall not be personally liable to the
Corporation or its shareholders for monetary damages for breach of fiduciary
duty as a director, except for liability (i) for any breach of the director's
duty of loyalty to the Corporation or its shareholders, (ii) for acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law, (iii) under Section 1053 of the Oklahoma General Corporation
Act, or (iv) for any transaction from which the director derived an improper
personal benefit.  If the Oklahoma General Corporation Act is amended to
authorize corporate action further eliminating or limiting the personal
liability of directors, then the liability of a director of the Corporation
shall be eliminated or limited to the fullest extent permitted by the Oklahoma
General Corporation Act, as so amended.  Any repeal or modification of this
paragraph C, Article 7 by the shareholders of the Corporation shall not
adversely affect any right or protection of a director of the Corporation
existing at the time of such repeal or modification.


                                   ARTICLE 8

     All provisions of the Oklahoma General Corporation Act will apply to the
Corporation and its stockholders to the fullest extent, and from and after
January 3, 1994 (the date of filing with the Secretary of State of the State of
Oklahoma of an amendment to the Amended and Restated Certificate of
Incorporation of the Corporation containing the provisions of this Article 8),
the provisions of the Oklahoma Business Corporation Act, Okla. Stat. tit. 18,
(S)1.1 et seq. (repealed 1986), and any and all rights, privileges or immunities
thereunder, shall be of no further force or effect with regard to the
Corporation and its stockholders; provided, however, any and all actions taken
by the Corporation prior to the adoption of this Article 8 are hereby ratified,
confirmed and approved.

                                   ARTICLE 9

                       BUSINESS COMBINATIONS; FAIR PRICE

A.   In addition to any affirmative vote required by law or this Certificate of
Incorporation, and except as otherwise expressly provided in paragraph B of this
Article 9:

     1.  any merger or consolidation of the Corporation or any Subsidiary (as
     hereinafter defined) with (a) any Interested Stockholder (as hereinafter
     defined), or (b) any other corporation, partnership or other entity
     (whether or not itself an Interested Stockholder) which is, or after such
     merger or consolidation would be, an Affiliate (as hereinafter defined) of
     an Interested Stockholder; or

     2.  any sale, lease, exchange, mortgage, pledge, transfer or other
     disposition (in one transaction or a series of transactions) to or with any
     Interested Stockholder, including all

                                      -7-
<PAGE>
 
     Affiliates of the Interested Stockholder, of any assets of the Corporation
     or any Subsidiary; or

     3.  the issuance or transfer by the Corporation or any Subsidiary (in one
     transaction or a series of transactions) of any securities of the
     Corporation or any Subsidiary to any Interested Stockholder, including all
     Affiliates of the Interested Stockholder, in exchange for cash, securities
     or other property (or a combination thereof), other than on a pro rata
     basis to all holders of Voting Stock of the same class held by the
     Interested Stockholder pursuant to a stock split, stock dividend or
     distribution of warrants or rights and other than in connection with the
     exercise or conversion of securities exercisable for or convertible into
     securities of the Corporation or any of its subsidiaries which securities
     have been distributed pro rata to all holders of Voting Stock; or

     4.  the adoption of any plan or proposal for the liquidation or dissolution
     of the Corporation proposed by or on behalf of an Interested Stockholder or
     any Affiliates of an Interested Stockholder; or

     5.  any reclassification of securities (including any reverse stock split),
     or recapitalization of the Corporation, or any merger or consolidation of
     the Corporation with any of its Subsidiaries or any other transaction
     (whether or not an Interested Stockholder is a party thereto) which has the
     effect, directly or indirectly, of increasing the proportionate share by
     more than one percent (1%) of the issued and outstanding shares of any
     class of equity or convertible securities of the Corporation or any
     Subsidiary which are directly or indirectly owned by any Interested
     Stockholder or one or more Affiliates of the Interested Stockholder; shall
     require the affirmative vote of the holders of at least 66 2/3% of the
     voting power of the then issued and outstanding Voting Stock, as
     hereinafter defined, voting together as a single class, including the
     affirmative vote of the holders of at least 66 2/3% of the voting power of
     the then issued and outstanding Voting Stock not Beneficially Owned
     directly or indirectly by an Interested Stockholder or any Affiliate of any
     Interested Stockholder.  Such affirmative vote shall be required
     notwithstanding the fact that no vote may be required, or that a lesser
     percentage may be permitted, by law or in any agreement with any national
     securities exchange or otherwise.

B.   The provisions of Section A of this Article 9 shall not be applicable to
any particular Business Combination (as hereinafter defined), and such Business
Combination shall require only such affirmative vote as is required by law or
any other provision of this Certificate of Incorporation, if the conditions
specified in either of the following paragraph 1 or 2 are met:

     1.  the Business Combination shall have been approved by a majority of the
     Continuing Directors (as hereinafter defined); or

     2.  all of the following price and procedural conditions shall have been
     met:

         (a) the aggregate amount of the cash and the Fair Market Value (as   
         hereinafter defined) as of the date of the consummation of the       
         Business Combination of                                              

                                      -8-
<PAGE>
 
          consideration other than cash, to be received per share by the holders
          of Common Stock in such Business Combination, shall be at least equal
          to the higher of the following:

               (i)  (if applicable) the highest per share price (including any
                    brokerage commissions, transfer taxes and soliciting
                    dealers' fees) paid by the Interested Stockholder for any
                    shares of Common Stock acquired by it (A) within the two (2)
                    year period immediately prior to the first public
                    announcement of the proposal of such Business Combination
                    (the "Announcement Date"), or (B) in the transaction in
                    which it became an Interested Stockholder, whichever is
                    higher; and

               (ii) the Fair Market Value per share of Common Stock on the
                    Announcement Date or on the date on which the Interested
                    Stockholder became an Interested Stockholder (the
                    "Determination Date"), whichever is higher.

          (b)  after such Interested Stockholder has become an Interested
          Stockholder and prior to the consummation of such Business
          Combination:

               (i)    there shall have been no failure to declare and pay at the
                      regular date therefor any full quarterly dividends
                      (whether or not cumulative) on any issued and outstanding
                      preferred stock, except as approved by a majority of the
                      Continuing Directors;

               (ii)   there shall have been no reduction in the annual rate of
                      dividends paid on the Common Stock (except as necessary to
                      reflect any subdivision of the Common Stock), except as
                      approved by a majority of the Continuing Directors;

               (iii)  there shall have been an increase in the annual rate of
                      dividends as necessary fully to reflect any
                      recapitalization (including any reverse stock split),
                      reorganization or any similar reorganization which has the
                      effect of reducing the number of issued and outstanding
                      shares of the Common Stock, unless the failure so to
                      increase such annual rate is approved by a majority of the
                      Continuing Directors; and

               (iv)   such Interested Stockholder shall not have become the     
                      Beneficial Owner of any additional Voting Stock except as 
                      part of the transaction which results in such Interested  
                      Stockholder becoming an Interested Stockholder.           

          (c)  the consideration to be received by holders of a particular class
          of issued and outstanding Voting Stock (including Common Stock and
          other than Preferred Stock with respect to which a majority of the
          Continuing Directors have approved a 

                                      -9-
<PAGE>
 
          Preferred Stock Designation creating such series that expressly
          provides that the provisions of this Article shall not apply) shall be
          in cash or in the same form as the Interested Stockholder has
          previously paid for shares of such class of Voting Stock (if the
          Interested Stockholder has paid for shares of any class of Voting
          Stock with varying forms of consideration, the form of consideration
          for such class of Voting Stock shall be either cash or the form used
          to acquire the largest number of shares of such class of Voting Stock
          previously acquired by it); and

          (d) after such Interested Stockholder has become an Interested
          Stockholder, such Interested Stockholder shall not have received the
          benefit, directly or indirectly (except proportionately as a
          stockholder), of any loans, advances, guarantees, pledges or other
          financial assistance or any tax credits or other tax advantages
          provided by the Corporation, whether in anticipation of or in
          connection with such Business Combination or otherwise; and

          (e) a proxy or information statement describing the proposed Business
          Combination and complying with the requirements of the Securities
          Exchange Act of 1934 and the rules and regulations thereunder (or any
          subsequent provisions replacing such Act, rules or regulations) shall
          be mailed to stockholders of the Corporation at least thirty (30) days
          prior to the consummation of such Business Combination (whether or not
          such proxy or information statement is required to be marked pursuant
          to such Act or subsequent provisions).

C.   For purposes of this Article 9 the following terms shall have the following
meanings:

     1.   "Affiliate" or "Associate" shall have the respective meanings ascribed
     to such terms in Rule 12b-2 of the General Rules and Regulations under the
     Securities Exchange Act of 1934.

     2.   "Beneficial Owner" shall have the meaning ascribed to such term in
     Rule 13d-3 of the General Rules and Regulations of the Securities Exchange
     Act of 1934.  In addition, a Person shall be the "Beneficial Owner" of any
     Voting Stock which such Person or any of its Affiliates or Associates has:
     (a) the right to acquire (whether such right is exercisable immediately or
     only after the passage of time), pursuant to any agreement, arrangement or
     understanding or upon the exercise of conversion rights, exchange rights,
     warrants or options, or otherwise; or (b) the right to vote pursuant to any
     agreement, arrangement or understanding (but neither such Person nor any
     such Affiliate or Associate shall be deemed to be the Beneficial Owner of
     any shares of Voting Stock solely by reason of a revocable proxy granted
     for a particular meeting of the stockholders, pursuant to a public
     solicitation of proxies for such meeting, and with respect to which shares
     neither such Person nor any such Affiliate or Associate is otherwise deemed
     the Beneficial Owner).

     3.   "Business Combination" shall mean any transaction described in any one
     or more of clauses (1) through (5) of Section A of this Article 9.

                                      -10-
<PAGE>
 
     4.   "Continuing Director" shall mean any member of the Board who is
     unaffiliated with and is not the Interested Stockholder and was a member of
     the Board prior to the time that the Interested Stockholder became an
     Interested Stockholder, and any director who is thereafter chosen to fill
     any vacancy on the Board or who is elected and who, in either event, is
     unaffiliated with the Interested Stockholder and in connection with his or
     her initial assumption of office is recommended for appointment or election
     by a majority of Continuing Directors then on the Board.

     5.   "Fair Market Value" shall mean: (a) in the case of stock, the highest
     closing sale price during the thirty (30) day period immediately preceding
     the date in question of a share of such stock on the Composite Tape for New
     York Stock Exchange listed stocks, or, if such stock is not quoted on the
     composite tape, on the New York Stock Exchange, or, if such stock is not
     listed on such exchange, on the principal United States securities exchange
     registered under the Securities Exchange Act of 1934 on which such stock is
     listed, or, if such stock is not listed on any such exchange, the highest
     closing bid quotation with respect to a share of such stock during the
     thirty (30) day period preceding the date in question on the National
     Association of Securities Dealers, Inc. Automated Quotation System or any
     system then in use in its stead, or if no such quotations are available,
     the fair market value on the date in question of a share of such stock as
     determined by the Board in accordance with Section D of this Article 9; and
     (b) in the case of property other than cash or stock, the fair market value
     of such property on the date in question as determined by the Board in
     accordance with Section D of this Article 9.

     6.   "Interested Stockholder" shall mean any Person to or which:

          (a) itself, or along with its Affiliates, is the Beneficial Owner,
          directly or indirectly, of more than fifteen percent (15%) of the then
          issued and outstanding Voting Stock; or

          (b) is an Affiliate of the Corporation and at any time within the two
          (2) year period immediately prior to the date in question was itself,
          or along with its Affiliates, the Beneficial Owner, directly or
          indirectly, of fifteen percent (15%) or more of the then issued and
          outstanding Voting Stock; or

          (c) is an assignee of or has otherwise succeeded to any Voting Stock
          which was at any time within the two (2) year period immediately prior
          to the date in question beneficially owned by an Interested
          Stockholder, if such assignment or succession shall have occurred in
          the course of a transaction or series of transactions not involving a
          public offering within the meaning of the Securities Act of 1933.

     For the purpose of determining whether a Person is an Interested
     Stockholder pursuant to paragraph 6 of this Section C, the number of shares
     of Voting Stock deemed to be issued and outstanding shall include shares
     deemed owned through application of paragraph 2 of this Section C but shall
     not include any other shares of Voting Stock that may be issuable 

                                      -11-
<PAGE>
 
     pursuant to any agreement, arrangement or understanding, or upon exercise
     of conversion rights, warrants or options or otherwise.

     Notwithstanding anything to the contrary contained in this Certificate of
     Incorporation, for purposes of this Certificate of Incorporation, the term
     "Interested Stockholder" shall not, for any purpose, include, and the
     provisions of Article 9(A) hereof shall not apply to: (a) the Corporation
     or any Subsidiary; (b) any employee stock ownership plan of the Corporation
     or any Subsidiary; or (c) any individual, corporation, partnership or other
     person, entity or group which "beneficially owned" on April 23, 1998, 15%
     or more of the outstanding Common Stock of the Corporation.

     7.  In the event of any Business Combination in which the Corporation
     survives, the phrase "other consideration to be received" as used in
     paragraph B of this Article 9 shall include the shares of Common Stock
     and/or the shares of any other class of issued and outstanding Voting Stock
     retained by the holders of such shares.

     8.  "Person" shall mean any individual, firm, corporation, partnership or
     other entity.

     9.  "Subsidiary" shall mean any corporation or other entity of which the
     Corporation owns, directly or indirectly, securities that enable the
     Corporation to elect a majority of the Board of Directors or other persons
     performing similar functions of such corporation or entity or that
     otherwise give to the Corporation the power to control such corporation or
     entity.

     10.  "Voting Stock" means all issued and outstanding shares of capital
     stock of the Corporation that pursuant to or in accordance with this
     Certificate of Incorporation are entitled to vote generally in the election
     of directors of the Corporation, and each reference herein, where
     appropriate, to a percentage or portion of shares of Voting Stock shall
     refer to such percentage or portion of the voting power of such shares
     entitled to vote.  The issued and outstanding shares of Voting Stock shall
     not include any shares of Voting Stock that may be issuable pursuant to any
     agreement, or upon the exercise or conversion of any rights, warrants or
     options or otherwise.

D.   The Continuing Directors of the Corporation shall have the power and duty
to determine for the purposes of this Article 9, on the basis of information
known to them after reasonable inquiry, all facts necessary to determine
compliance with this Article 9, including, without limitation:

     1.   whether a Person is an Interested Stockholder;

     2.   the number of shares of Voting Stock beneficially owned by any Person;

     3.   whether a Person is an Affiliate or Associate of another;

     4.  whether the applicable conditions set forth in paragraph 2 of paragraph
     B of this Article 9 have been met with respect to any Business Combination;
     and

                                      -12-
<PAGE>
 
     5.  the Fair Market Value of stock or other property in accordance with
     paragraph 6 of paragraph C of this Article 9.

E.   Nothing contained in this Article 9 shall be construed to relieve any
Interested Stockholder from any fiduciary obligation imposed by law.

F.   In addition to any affirmative vote required by applicable law and in
addition to any vote of the holders of any series of Preferred Stock provided
for or fixed pursuant to the provisions of Article 5 of this Certificate of
Incorporation, any alteration, amendment or repeal relating to this Article 9
must be approved by the affirmative vote of the holders of at least 66 2/3% of
the combined voting power of the issued and outstanding shares of Voting Stock,
voting together as a single class.

                                   ARTICLE 10
                                        
     Article 7, Sections (A) and (B), of the Certificate of Incorporation may be
(and may only be) amended by the affirmative vote of the holders of at least 66
2/3% of the voting power of all of the then-outstanding shares of the capital
stock of the Corporation entitled to vote generally in the election of
directors, voting together as a single class.

     IN WITNESS WHEREOF, said BancFirst Corporation has caused this Amended and
Restated Certificate of Incorporation to be signed by David E. Rainbolt, its
President, and attested by Randy Foraker, its Assistant Secretary, this 23rd day
of July, 1998.



                                       BancFirst Corporation



                                       By:  /s/ David E. Rainbolt
                                          --------------------------------
                                          David E. Rainbolt, President


ATTEST:

[Seal]

  /s/ Randy Foraker
- -----------------------------------
Randy Foraker, Assistant Secretary

                                      -13-


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