UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                 SCHEDULE 13D/A
          Under the Securities Exchange Act of 1934 (Amendment No. 10)

                                   ONEOK, INC.
--------------------------------------------------------------------------------
                                (Name of Issuer)

                     Common Stock, Par Value $0.01 per share
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    68267810
--------------------------------------------------------------------------------
                                 (CUSIP Number)

                              Larry D. Irick, Esq.
                     Vice President and Corporate Secretary
                               Westar Energy, Inc.
--------------------------------------------------------------------------------
                         (f/k/a Western Resources, Inc.)
                             818 South Kansas Avenue
                              Topeka, Kansas 66612
                                 (785) 575-1625
            (Name, Address and Telephone Number of Person Authorized
                     to Receive Notices and Communications)

                                February 5, 2003
--------------------------------------------------------------------------------
             (Date of Event which Requires Filing of this Statement)

If a filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following
box:  / /


                                  Page 1 of 9



                                  SCHEDULE 13D



CUSIP No. 68267810
--------------------------------------------------------------------------------
1        NAME OF REPORTING PERSON
         S.S. OR I.R.S. IDENTIFICATION No. OF ABOVE PERSON

         WESTAR ENERGY, INC. (f/k/a WESTERN RESOURCES, INC.)  48-0290150
--------------------------------------------------------------------------------
2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP            (A) / /
                                                                     (B) / /

--------------------------------------------------------------------------------
3        SEC USE ONLY


--------------------------------------------------------------------------------
4        SOURCE OF FUNDS

                                       N/A
--------------------------------------------------------------------------------
5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
         REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)                      / /

--------------------------------------------------------------------------------
6        CITIZENSHIP OR PLACE OF ORGANIZATION

                                     Kansas
--------------------------------------------------------------------------------

                                 7          SOLE VOTING POWER
                                            0

                                 8          SHARED VOTING POWER
                                            4,714,433
          NUMBER OF                         An additional 21,815,386 shares of
          SHARES                            Common Stock issuable in certain
          BENEFICIALLY                      circumstances in the event of the
          OWNED BY                          conversion (the conditions for
          EACH                              which are not expected to occur
          REPORTING                         within the next 60 days) of
          PERSON WITH                       21,815,386 shares of Series D
                                            Convertible Preferred Stock.

                                 9          SOLE DISPOSITIVE POWER
                                            0

                                 10         SHARED DISPOSITIVE POWER
                                            4,714,433
                                            An additional 21,815,386 shares of
                                            Common Stock issuable in certain
                                            circumstances in the event of the
                                            conversion (the conditions for which
                                            are not expected to occur within the
                                            next 60 days) of 21,815,386 shares
                                            of Series D Convertible Preferred
                                            Stock.

--------------------------------------------------------------------------------
11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                  4,714,433

--------------------------------------------------------------------------------
12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
         CERTAIN SHARES                                             / /

                                  Page 2 of 9


--------------------------------------------------------------------------------
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                  6.35%

         Up to 27.4% of the Common Stock outstanding in the event of conversion
         (the conditions for which are not expected to occur within the next 60
         days) of Series D Convertible Preferred Stock.

--------------------------------------------------------------------------------
14       TYPE OF REPORTING PERSON

                                       CO
--------------------------------------------------------------------------------



                                   Page 3 of 9



                                  SCHEDULE 13D


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


CUSIP No. 68267810
--------------------------------------------------------------------------------
1        NAME OF REPORTING PERSON
         S.S. OR I.R.S. IDENTIFICATION No. OF ABOVE PERSON

         WESTAR INDUSTRIES, INC. (f/k/a WESTAR CAPITAL, INC.) 48-1092416
--------------------------------------------------------------------------------
2        CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP         (A) / /
                                                                  (B) / /

--------------------------------------------------------------------------------
3        SEC USE ONLY


--------------------------------------------------------------------------------
4        SOURCE OF FUNDS

                                       N/A
--------------------------------------------------------------------------------
5        CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
         REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)                   / /

--------------------------------------------------------------------------------
6        CITIZENSHIP OR PLACE OF ORGANIZATION

                                    Delaware
--------------------------------------------------------------------------------

                                 7          SOLE VOTING POWER
                                            0

                                 8          SHARED VOTING POWER
                                            4,714,433
          NUMBER OF                         An additional 21,815,386 shares of
          SHARES                            Common Stock issuable in certain
          BENEFICIALLY                      circumstances in the event of the
          OWNED BY                          conversion (the conditions for
          EACH                              which are not expected to occur
          REPORTING                         within the next 60 days) of
          PERSON WITH                       21,815,386 shares of Series D
                                            Convertible Preferred Stock.

                                 9          SOLE DISPOSITIVE POWER
                                            0

                                 10         SHARED DISPOSITIVE POWER
                                            4,714,433
                                            An additional 21,815,386 shares of
                                            Common Stock issuable in certain
                                            circumstances in the event of the
                                            conversion (the conditions for which
                                            are not expected to occur within the
                                            next 60 days) of 21,815,386 shares
                                            of Series D Convertible Preferred
                                            Stock.


--------------------------------------------------------------------------------
11       AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                  4,714,433

                                  Page 4 of 9


--------------------------------------------------------------------------------
12       CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
         CERTAIN SHARES                                              / /

--------------------------------------------------------------------------------
13       PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                           6.35%

         Up to 27.4% of the Common Stock outstanding in the event of conversion
(the conditions for which are not expected to occur within the next 60 days) of
Series D Convertible Preferred Stock.

--------------------------------------------------------------------------------
14       TYPE OF REPORTING PERSON

                                       CO
--------------------------------------------------------------------------------



Item 1. Security and Issuer.

     This statement on Schedule 13D (the "Statement") is filed by Westar Energy,
Inc. (f/k/a Western Resources, Inc.), a Kansas corporation ("Westar Energy"),
and Westar Industries, Inc. (f/k/a Westar Capital, Inc.), a Delaware corporation
and a wholly owned subsidiary of Westar Energy ("Westar Industries" and,
together with Westar Energy, the "Reporting Persons"), and relates to the Common
Stock, par value $0.01 per share (the "Common Stock"), of ONEOK, Inc., an
Oklahoma corporation (the "Issuer") which Common Stock is held by Westar
Industries. This Statement supplements and amends the statement on Schedule 13D
originally filed by the Reporting Persons with the Commission on December 5,
1997, as amended by Amendment No. 1, filed with the Commission on November 29,
1999, Amendment No. 2, filed with the Commission on January 27, 2000, Amendment
No. 3, filed with the Commission on March 8, 2000, Amendment No. 4 filed with
the Commission on April 8, 2002, Amendment No. 5 filed with the Commission on
April 26, 2002, Amendment No. 6 filed with the Commission on May 23, 2002,
Amendment No. 7 filed with the Commission on June 3, 2002, Amendment No. 8 filed
with the Commission on August 29, 2002 and Amendment No. 9 filed with the
Commission on January 10, 2003 (as amended, the "Schedule 13D").

     The address of the principal executive offices of the Issuer is: ONEOK,
Inc., 100 West Fifth Street, Tulsa, Oklahoma 74103.

Item 2. Identity and Background

     Westar Energy is a Kansas corporation. It is a consumer services company
with interests in monitored services and energy. The principal business address
of Westar Energy is: Westar Energy, Inc. 818 S. Kansas Avenue, Topeka, Kansas
66612.

     The name, business address, present principal occupation or employment and
citizenship of each of the executive officers and directors of Westar Energy is
set forth in Exhibit 1.1 and is incorporated by reference herein. During the
last five years, Westar Energy, and to the knowledge of Westar Energy, none of
the persons listed on Exhibit 1.1 hereto, (i) has been convicted in a criminal
proceeding (excluding traffic violations or similar misdemeanors) or (ii) was a
party to a civil proceeding of a judicial or administrative body of competent
jurisdiction as a result of which any such person was or is subject to a
judgment, decree or final order enjoining future violations of, or prohibiting
activities subject to, federal or state securities laws or finding any violation
of such law.


Item 4. Purpose of the Transaction.

     The last paragraph of Item 4 is deleted and following disclosure is in lieu
thereof:


                                  Page 5 of 9


     On February 5, 2003, the Issuer repurchased 9,038,755 shares of its Series
A Convertible Preferred Stock from Westar Industries, a wholly owned subsidiary
of Westar Energy. Westar Industries also exchanged its remaining shares of
Series A Convertible Preferred Stock for 21,815,386 new shares of the Issuer's
Series D Convertible Preferred Stock. Westar Industries continues to hold
4,714,433 shares of the Issuer's common stock. Westar Industries now has a total
ownership interest of 27.4 % in the Issuer.

     In addition, the Issuer has agreed to register the Series D Convertible
Preferred and common stock held by Westar Industries for future sale, subject to
the effectiveness of such registration, the expiration of a 180-day lock-up
period and future market conditions.

Item 7. Material to be Filed as Exhibits.

     Exhibit 1.1 previously filed is replaced by Exhibit 1.1 as amended below:

     EXHIBIT 1.1  Identity of Executive Officers and Directors of Westar
                  Energy, Inc.
     EXHIBIT 11   Certificate of the Designations of $0.925 Series D
                  Non-Cumulative Convertible Preferred Stock dated
                  February 3, 2003.
     EXHIBIT 12   Stock Purchase Agreement dated as of February 5, 2003.





                                  Page 6 of 9



         Signature

     After reasonable inquiry and to the best of our knowledge and belief, the
undersigned certify that the information set forth in this statement is true,
complete and correct.

Dated:  February 6, 2003


                            WESTAR ENERGY, INC.


                            By:    /s/ James S. Haines, Jr.
                                   --------------------------------------------
                                   Name:    James S. Haines, Jr.
                                   Title:   President and Chief Executive
                                              Officer


                            WESTAR INDUSTRIES, INC.


                            By:    /s/ James S. Haines, Jr.
                                   --------------------------------------------
                                   Name:    James S. Haines, Jr.
                                   Title:   President and Chief Executive
                                              Officer



                                  Page 7 of 9



                                   EXHIBIT 1.1
       Identity of Executive Officers and Directors of Westar Energy, Inc.


     The name, present principal occupation or employment, and the name of any
corporation or other organization in which such employment is conducted, of each
of the directors and executive officers of Westar Energy, Inc. ("Westar Energy")
is set forth below. Each of the directors and officers is a citizen of the
United States. The business address of each director and officer is Western
Energy, Inc., 818 South Kansas Avenue, Topeka, Kansas 66612. Unless otherwise
indicated, each occupation set forth opposite an executive officer's name refers
to employment with Westar Energy.




Name                                    Title                                 Present Principal Occupation
                                                                              or Employment
Executive Officers
------------------
                                                                        
James S. Haines, Jr.                    President and Chief Executive         same
                                        Officer

Mark A. Ruelle                          Executive Vice President and Chief    same
                                        Financial Officer

William B. Moore                        Executive Vice President and Chief    same
                                        Operating Officer

Richard A. Dixon                        Senior Vice President                 same

Douglas R. Sterbenz                     Senior Vice President                 same

Directors
---------
Frank J. Becker                         Director                              President of Becker Investments,
                                                                              Inc. in Lawrence, Kansas.

Gene A. Budig                           Director                              Senior Advisor to the Commissioner
                                                                              of Baseball, American League of
                                                                              Professional Baseball Clubs in New
                                                                              York, New York and a professor in
                                                                              the Woodrow Wilson School of Public
                                                                              and International Affairs at
                                                                              Princeton University.

Charles Q. Chandler, IV                 Director, Chairman of the Board       Chairman of the Board, President
                                                                              and Chief Executive Officer of
                                                                              INTRUST Bank, N.A. and President of
                                                                              INTRUST Financial Corporation.

R. A. Edwards III                       Director                              President and Chief Executive Officer
                                                                              and a director of the First National
                                                                              Bank of Hutchinson, Kansas.

James S. Haines, Jr.                    Director                              President and Chief Executive
                                                                              Officer, Westar Energy, Inc.


                                  Page 8 of 9


Larry D. Irick                          Director                              Vice President and Corporate
                                                                              Secretary of Westar Energy, Inc.

John C. Nettles, Jr.                    Director                              Partner in the law firm of
                                                                              Morrisson & Hecker, L.L.P. in
                                                                              Overland Park, Kansas.





                                  Page 9 of 9





                                                                      EXHIBIT 11


                    CERTIFICATE OF THE DESIGNATIONS, POWERS,
                    PREFERENCES AND RELATIVE, PARTICIPATING,
                OPTIONAL OR OTHER RIGHTS, AND THE QUALIFICATIONS,
             LIMITATIONS OR RESTRICTIONS THEREOF, OF $0.925 SERIES D
                  NON - CUMULATIVE CONVERTIBLE PREFERRED STOCK
                                       OF

                                   ONEOK, INC.

                         PURSUANT TO SECTION 1032 OF THE
                GENERAL CORPORATION ACT OF THE STATE OF OKLAHOMA


     ONEOK, INC., an Oklahoma corporation (the "Corporation"), does hereby
certify that the Board of Directors of the Corporation duly adopted the
following resolution, at a meeting duly convened and held on January 9, 2003, in
respect of a series of Preferred Stock, par value $0.01 per share, of the
Corporation, pursuant to authority conferred upon the Board by Article Fourth of
the Certificate of Incorporation of the Corporation and in accordance with
Section 1032 of the General Corporation Act of the State of Oklahoma:

     BE IT RESOLVED, that the issuance of a series of Preferred Stock of the
Corporation is hereby authorized, and the designation, amount, powers,
preferences and relative, participating, optional and other special rights and
qualifications, limitations and restrictions thereof, of the shares of such
series of Preferred Stock of the Corporation, are hereby fixed as follows:

     1. Designation; Class and Amount; Certain Definitions. The Preferred Stock,
the issuance of which is hereby authorized, shall comprise 21,815,386 shares the
distinctive serial designation of which shall be "$0.925 Series D Non-Cumulative
Convertible Preferred Stock" which is sometimes herein referred to as "Series D
Preferred Stock." The number of shares of Series D Preferred Stock which are
purchased or otherwise acquired by the Corporation or converted into Common
Stock shall be canceled and shall revert to authorized but unissued shares of
Series D Preferred Stock. Certain capitalized terms used herein have the
meanings specified therefor in Section 11 below.

     2. Dividends; Priority.

     (a) Payments of Dividend; Series D Preferred Stock. Each Holder of shares
of Series D Preferred Stock shall be entitled to receive, when and if declared
by the Board, in respect of each share of Series D Preferred Stock, out of the
funds of the Corporation legally available therefor, for each Dividend Period or
portion thereof, quarterly cash dividends in an amount per share equal to
$0.23125 from and after the date of issuance of the shares of Series D Preferred
Stock (the "Issue Date"), as long as the shares of Series D Preferred Stock
remain




outstanding. No interest, or sum of money in lieu of interest, shall be payable
in respect of any dividend payment or payments on shares of Series D Preferred
Stock, which are not paid.

     (b) Payment and Record Dates. Dividends accrued on the Series D Preferred
Stock in respect of each Dividend Period shall be payable, when and if declared
by the Board in arrears concurrently with each date of payment (each such date,
a "Dividend Payment Date") by the Corporation of quarterly cash dividends on the
Common Stock in respect of such Dividend Period; provided, however, that if any
such day is not a Business Day the applicable Dividend Payment Date shall be the
next succeeding day that is a Business Day; and provided, further that if no
quarterly cash dividends are paid on the Common Stock in respect of any such
Dividend Period, the Dividend Payment Date shall mean such date as may be
determined by the Board within three months following the end of such Dividend
Period; provided, however, dividends payable with respect to the Dividend Period
immediately following the Issue Date shall accrue from the Issue Date. Dividends
on the Series D Preferred Stock shall accrue on a daily basis from the
commencement of each Dividend Period. Dividends will cease to accrue in respect
of any shares of Series D Preferred Stock on the Surrender Date in respect of a
conversion pursuant to Section 8(a) or on the Redemption Date in respect of a
redemption. Dividends payable on the Series D Preferred Stock for any Dividend
Period constituting less than a full fiscal quarter shall be computed ratably on
the basis of a 360-day year of twelve (12) 30-day months. Dividends for any
Dividend Period shall not be cumulative to the extent not paid in full on each
Dividend Payment Date. Dividends on the Series D Preferred Stock in respect of
any Dividend Period unpaid as of the Dividend Payment Date for such Dividend
Period shall permanently remain unpaid. The foregoing notwithstanding, dividends
on account of arrears for any past Dividend Periods may be declared and paid at
any time, without reference to any regular Dividend Payment Date. Dividends
shall be payable to the Holders as they appear on the Stock Books not exceeding
forty (40) days preceding the relevant Dividend Payment Date. Dividends shall be
paid in cash, by wire transfer in immediately available funds to the accounts
designated by the respective Holders in written notices given to the Corporation
at least five (5) Business Days prior to the payment date or by such other means
as may be agreed to by the Corporation and the respective Holders, such wire
transfer to be effected for good value on or before the Dividend Payment Date.

     (c) Special Dividends; Notice. Notwithstanding anything in this Certificate
of Designations to the contrary, the holders of the Series D Preferred Stock
shall participate in all Special Dividends on a share-for-share basis with the
holders of Common Stock, as if shares of the Series D Preferred Stock were
converted into Common Stock immediately prior to the record date with respect to
each such Special Dividend.

     (d) Priority as to Dividends; Restriction on Dividends, Redemption, etc.
The Corporation shall not, for so long as the Series D Preferred Stock shall
remain outstanding, directly or indirectly, declare or pay or set apart for
payment any dividends (including cumula-



                                      -2-


tive dividends) or make (or permit any Subsidiary to make) any other
distributions on, or payment on account of the purchase, redemption or other
retirement or acquisition for value of the Common Stock, any other capital stock
of the Corporation ranking equal to or junior to the Series D Preferred Stock as
to dividends or as to distribution of assets upon any liquidation, dissolution
or winding-up of the affairs of the Corporation or any options, warrants or
rights to purchase or acquire Common Stock or any such capital stock or any
securities convertible into or exchangeable for shares of Common Stock or any
such capital stock, except that such payment of dividends and such other
distributions and payments may be made so long as full dividends payable on the
Series D Preferred Stock for the Dividend Period commencing immediately prior to
the date of such dividend, distribution or other payment have been or are
concurrently paid (or a sum sufficient for the payment thereof set apart for
such payment subject to declaration thereof); provided, however, that the
foregoing restrictions shall not apply to: (i) any dividend payable solely in
shares of any stock of the Corporation ranking, as to dividends and as to
distribution of assets upon any liquidation, dissolution or winding-up of the
affairs of the Corporation, junior to the Series D Preferred Stock (or payable
solely in options, warrants or rights to purchase or acquire any such stock) or
(ii) any distribution pursuant to any employee or director incentive or benefit
plan or arrangement (including any employment, severance or consulting
agreement) of the Corporation or any Subsidiary heretofore or hereafter adopted
or (iii) any distribution pursuant to a redemption, at the stated redemption
price, of any rights granted to Holders of Common Stock pursuant to a
stockholder rights plan or (iv) any dividend approved in writing by the holders
of at least 66 2/3 percent of all shares of Series D Preferred Stock then
outstanding. Holders of shares of Series D Preferred Stock shall be entitled to
receive dividends in accordance with the foregoing clause (a) of this Section 2
in preference to and in priority over any dividend upon any securities junior to
the Series D Preferred Stock.

     3. Voting Rights. Holders of shares of Series D Preferred Stock, voting
together as a single class with holders of shares of Common Stock (and with
holders of any other class or series of stock which may similarly be entitled to
vote with the holders of Common Stock) shall be entitled at any meeting of
stockholders called for the purpose of voting on (or acting by written consent
without need of any advance notice) (i) any proposed amendment to the
Certificate of Incorporation or By-laws which would reasonably have the effect
of modifying in any way Section 1, Article Twelfth of the Amended Certificate of
Incorporation of the Corporation dated January 15, 1998, electing that Sections
1145 through 1155 of Title 18 of the Oklahoma General Corporation Law (the
"Control Share Acquisition Statute") shall not apply to the Corporation, or
would reasonably cause the Corporation to become subject to (a) the Control
Share Acquisition Statute or (b) any other provisions which are substantially
similar to the Control Share Acquisition Statute, to abstain or vote for or
against such amendment and (ii) any transaction or series of transactions
submitted to a vote of the stockholders of the Corporation which, if
consummated, would constitute a Change in Control, to vote with respect to such
transaction(s). When voting together with the holders of shares of Common Stock
on



                                      -3-


any such transaction(s), each share of Series D Preferred Stock shall carry, as
of the record date applicable to such vote, a number of votes equal to the
number of votes carried in the aggregate by the number of shares of Common Stock
issuable upon conversion of one share of Series D Preferred Stock into Common
Stock in accordance with Section 8 below.

     (a) Except as provided by this Section 3 and Sections 4 and 9 below, or as
otherwise may be required by applicable law, the Holders of Series D Preferred
Stock shall not be entitled, by virtue of their being Holders thereof, to vote
in any election of directors to the Board of the Corporation, or with respect to
any other matter submitted to the stockholders of the Corporation. Where a vote
of the Holders, voting as a separate class, may be required by applicable law or
by this Section 3 or Section 4 or 9, each share of Series D Preferred Stock
shall carry one vote.

     4. Covenants. So long as any shares of Series D Preferred Stock are
outstanding, the Corporation covenants and agrees with and for the benefit of
the Holders of such shares that without the affirmative vote or consent of
Holders of 66 2/3 percent of all shares of the Series D Preferred Stock then
outstanding, voting as a separate class in person or by proxy or by written
consent delivered to the Secretary of the Corporation, the Corporation shall not
amend, alter or repeal any provision of the Certificate of Incorporation of the
Corporation, this Certificate of Designations, or any amendment or supplement to
any of the foregoing, so as to affect adversely the rights, powers, preferences,
qualifications, limitations or restrictions of any Holder of Series D Preferred
Stock.

     5. Optional Redemption. Subject to the rights of Holders of shares of
Series D Preferred Stock set forth in Section 8 hereof, the Corporation may, at
its option, redeem, in the manner provided for in Section 6 hereof, on or after
August 1, 2006, all or a portion of the shares of Series D Preferred Stock at
the Redemption Price per share if the Closing Price of the Common Stock exceeds
$25.00 for 30 consecutive Trading Days prior to the date notice is given by
Corporation pursuant to Section 6 hereof of its intention to redeem all or a
portion of the shares of Series D Preferred Stock pursuant to this Section 5.
The "Redemption Price" shall equal the product of (x) $20.00 and (y) the number
of shares of Common Stock then issuable upon the conversion of one share of
Series D Preferred Stock.

     6. Procedure for Redemption. In the event that the Corporation shall redeem
shares of Series D Preferred Stock pursuant to Section 5 hereof, notice of such
redemption (a "Redemption Notice") shall be mailed by first-class mail, postage
prepaid, not less than 30 days nor more than 90 days, except as provided below,
prior to the redemption date (the "Redemption Date") described in such notice,
to the Holders of record of shares to be redeemed at their respective addresses
as they shall appear in the records of the Corporation; provided, however, that
failure to give such notice or any defect therein or the mailing thereof shall
not affect the validity of the proceeding for the redemption of any shares so to
be re-



                                      -4-


deemed except as to the Holder to whom the Corporation has failed to give such
notice or except as to the Holder to whom notice was defective. Each such notice
shall state: (i) the Redemption Date; (ii) the number of shares of Series D
Preferred Stock to be redeemed; (iii) the Redemption Price; (iv) the place or
places where certificate for such shares are to be surrendered for payment of
the redemption price; (v) that dividends on the shares to be redeemed ceased to
accrue as of the date of such notice; and (vi) that the Holder's right to
convert such shares into shares of Common Stock shall terminate on the close of
business on the second Business Day preceding such Redemption Date. In the event
that the Corporation has delivered a Redemption Notice to the Shareholder and
the Shareholder is then precluded under Section 4.2(a), (b) or (c) of the
Registration Rights Agreement from effecting an underwritten offering of Common
Stock or Series D Preferred Stock, then the Redemption Date shall automatically
be extended until the ninety-first (91st) day following the date that the
restrictions set forth in Section 4.2(a), (b) or (c) of the Registration Rights
Agreement have expired.

     (a) In the event that fewer than all shares of Series D Preferred Stock
represented by a surrendered certificate are to be redeemed hereunder, a new
certificate shall be issued at the Corporation's expense representing the shares
of Series D Preferred Stock not so redeemed.

     (b) Effective on the Redemption Date, any shares of Series D Preferred
Stock redeemed shall no longer be deemed outstanding, all rights of the Holders
thereof as preferred stockholders of the Corporation shall cease and thereupon
the certificate(s) theretofore representing shares of Series D Preferred Stock
shall represent only the right to receive the Redemption Price in respect
thereof.

     (c) On or prior to the Redemption Date, the Redemption Price with respect
to all the shares of Series D Preferred Stock to be redeemed shall be deposited
with the Corporation's transfer agent.

     7. Liquidation Preference. In the event of any voluntary or involuntary
liquidation, dissolution or winding up of the affairs of the Corporation, the
Holders of shares of Series D Preferred Stock then outstanding shall be entitled
to be paid out of the assets of the Corporation available for distribution to
its stockholders an amount per share in cash equal to the amount that would be
payable on one share of Common Stock (such amount payable being adjusted
appropriately to reflect any stock split, stock dividend, reverse stock split,
or any transaction with comparable effect upon the Common Stock and assuming
conversion of all shares of Series D Preferred Stock then outstanding into
shares of Common Stock immediately prior to such liquidation, dissolution or
winding-up), plus all dividends then due on the Series D Preferred Stock (the
"Liquidation Preference"). This entitlement of the Holders of shares of Series D
Preferred Stock shall be satisfied before any similar payment shall be made or
any assets distributed to the holders of the Common Stock or any other security
junior in



                                      -5-


rank to the Series D Preferred Stock as to distribution of assets upon such
dissolution, liquidation or winding-up. If the assets of the Corporation are not
sufficient to pay in full the liquidation payments payable to all of the Holders
of the outstanding shares of Series D Preferred Stock, then the Holders of all
such shares shall share ratably in such distribution of assets in accordance
with the respective liquidation preferences to which they are entitled. For the
purposes of this section, neither the voluntary sale, conveyance, exchange or
transfer (for cash, shares of stock, securities or other consideration) of all
or substantially all of the property or assets of the Corporation nor the
consolidation or merger of the Corporation with one or more other corporations
shall be deemed to be a liquidation, dissolution or winding-up, voluntary or
involuntary, unless such voluntary sale, conveyance, exchange or transfer shall
be in connection with a dissolution or winding up of the business of the
Corporation.

     8. Conversion.

     (a) Conversion Right. The Holder of any share or shares of Series D
Preferred Stock shall have the right, at any time, at such Holder's option, to
convert, without the payment of additional consideration, each share of Series D
Preferred Stock held by that Holder into one fully paid and nonassessable share
of Common Stock (as adjusted pursuant to Section 8(c) hereof); provided,
however, that shares of the Series D Preferred Stock Beneficially Owned by any
member of the Shareholder Group shall not be convertible unless the aggregate of
the regular cash dividends for the fiscal year immediately prior to such
conversion that would have been payable with respect to all the shares of Common
Stock issuable upon the conversion of one share of Series D Preferred Stock is
greater than $0.925 (the "Conversion Threshold"); provided, further, that the
shares of Series D Preferred Stock Beneficially Owned by any member of the
Shareholder Group shall not be convertible if such conversion would have a
material adverse effect on the exemptions from the Public Utility Holding
Company Act of 1935, as amended, of the Corporation or any of its Subsidiaries
or Parent, the Shareholder or any affiliate of the Shareholder. Special or
extraordinary dividends shall not be taken into account in determining whether
the Conversion Threshold has been met. Notwithstanding anything in this Section
8(a) to the contrary, any member of the Shareholder Group may convert shares of
Series D Preferred Stock into shares of Common Stock at any time in connection
with, and immediately prior to, a Transfer pursuant to subsections (a)-(c) and
(e) of Section 4.3 of the Shareholder Agreement.

     (b) Conversion Procedures. Any Holder of shares of Series D Preferred Stock
desiring to convert such shares into Common Stock shall surrender the
certificate(s) evidencing such shares of Series D Preferred Stock of the Holder
at the office of the Corporation's transfer agent. Such surrendered
certificate(s), if the Corporation shall so require, shall be duly endorsed to
the Corporation or in blank, or accompanied by proper instruments of transfer to
the Corporation or in blank, and shall be accompanied by written notice to the
Corporation that the Holder elects so to convert such shares of Series D
Preferred Stock, which notice shall



                                      -6-


specify the name or names (with address or addresses) in which the Holder wishes
the certificate(s) evidencing shares of Common Stock to be issued, in exchange
for that certificate or those certificates so surrendered.

          (i) The Corporation shall, within five (5) Business Days after such
     surrender of certificates evidencing shares of Series D Preferred Stock
     accompanied by written notice and in compliance with any other conditions
     contained herein, issue and deliver, or cause to be issued and delivered,
     to the person(s) for whose account such certificate(s) evidencing shares of
     Series D Preferred Stock were so surrendered, or to the nominee(s) of such
     Person(s), certificates representing the number of full shares of Common
     Stock to which such Person shall be entitled pursuant to the
     then-applicable conversion rate. Such conversion shall be deemed to have
     been made on the date of such surrender of the certificate(s) evidencing
     shares of Series D Preferred Stock to be converted (the "Surrender Date")
     and the Person(s) entitled to receive the Common Stock deliverable upon
     conversion of such Series D Preferred Stock shall be treated for all
     purposes as the record holder(s) of such Common Stock on such date and
     thereafter. Conversion of Series D Preferred Stock may otherwise be
     achieved in accordance with such procedures as the Corporation and a
     majority of the Holders may agree.

          (ii) In the event that fewer than all shares of Series D Preferred
     Stock represented by a surrendered certificate are to be converted
     hereunder, a new certificate shall be issued at the Corporation's expense
     representing the shares of Series D Preferred Stock not so converted.

          (iii) Effective on the day following the Surrender Date, dividends
     shall cease to accrue on any shares of Series D Preferred Stock surrendered
     for conversion, such shares of Series D Preferred Stock shall no longer be
     deemed outstanding, all rights of the Holders thereof as preferred
     stockholders of the Corporation shall cease (other than the right to
     receive dividends declared or otherwise payable to Holders of Series D
     Preferred Stock on a record date prior to the Surrender Date) and thereupon
     the certificate(s) theretofore representing shares of Series D Preferred
     Stock shall represent only the right to receive the Common Stock
     deliverable upon conversion in respect thereof.

          (iv) If any shares of Series D Preferred Stock are surrendered for
     conversion subsequent to the record date preceding a Dividend Payment Date
     but on or prior to such Dividend Payment Date (except shares called for
     redemption on a redemption date between such record date and such Dividend
     Payment Date), the Holder of such shares at the close of business on such
     record date shall be entitled to receive the dividend payable on such
     shares on such Dividend Payment Date notwithstanding the conversion
     thereof.

     (c) The conversion rate shall be adjusted from time to time as follows:



                                      -7-


          (i) In case the Corporation shall, at any time or from time to time
     while any of the shares of Series D Preferred Stock are outstanding, (A)
     pay a dividend in shares of its Common Stock, (B) subdivide its outstanding
     shares of Common Stock into a larger number of shares, or (C) combine its
     outstanding shares of Common Stock into a smaller number of shares, the
     conversion rate in effect immediately prior to such action shall be
     adjusted so that the Holder of any shares of Series D Preferred Stock
     thereafter surrendered for conversion shall be entitled to receive the
     number of shares of Common Stock which such Holder would have owned or have
     been entitled to receive immediately following such action had such shares
     of Series D Preferred Stock been converted immediately prior thereto. An
     adjustment made pursuant to this Section 8(c)(i) shall become effective
     retroactively to immediately after the opening of business on the Business
     Day following the record date in the case of a dividend and shall become
     effective immediately after the opening of business on the Business Day
     following the effective date in the case of a subdivision or combination.
     If, as a result of an adjustment made pursuant to this Section 8(c)(i), the
     Holder of any shares of Series D Preferred Stock thereafter surrendered for
     conversion shall become entitled to receive shares of two or more classes
     of capital stock of the Corporation, the Board of Directors (whose
     determination shall be conclusive) shall determine the allocation of the
     adjusted conversion rate between or among shares of such classes of capital
     stock.

          (ii) In case the Corporation shall, at any time or from time to time
     while any of the shares of Series D Preferred Stock are outstanding, issue
     rights or warrants to all holders of shares of its Common Stock entitling
     them to subscribe for or purchase shares of Common Stock (or securities
     convertible into or exchangeable for Common Stock) at a price per share
     less than the current Market Price per share of Common Stock, at such
     record date, the conversion rate shall be adjusted so that it shall equal
     the rate determined by multiplying the conversion rate in effect
     immediately prior to the date of issuance of such rights or warrants by a
     fraction, the numerator of which shall be the number of shares of Common
     Stock outstanding on the date of issuance of such rights or warrants plus
     the number of additional shares of Common Stock offered for subscription or
     purchase, and the denominator of which shall be the number of shares of
     Common Stock outstanding on the date of issuance of such rights or warrants
     plus the number of shares which the aggregate offering price of the total
     number of shares so offered would purchase at such current market price.
     For the purposes of this Section 8(c)(ii), the issuance of rights or
     warrants to subscribe for or purchase securities convertible into Common
     Stock shall be deemed to be the issuance of rights or warrants to purchase
     the shares of Common Stock into which such securities are convertible at an
     aggregate offering price equal to the aggregate offering price of such
     securities plus the minimum aggregate amount (if any) payable upon
     conversion of such securities into shares of Common Stock; provided,
     however, that if all of the shares of Common Stock subject to such rights
     or warrants have not been issued when such



                                      -8-


     rights or warrants expire, then the conversion rate shall promptly be
     readjusted to the conversion rate which would then be in effect had the
     adjustment upon the issuance of such rights or warrants been made on the
     basis of the actual number of shares of Common Stock issued upon the
     exercise of such rights or warrants. The foregoing provision shall not
     apply to issuances of rights pursuant to a stockholder rights plan provided
     that such rights are issued together with the Common Stock upon conversion
     of the Series D Preferred Stock. An adjustment made pursuant to this
     Section 8(c)(ii) shall become effective retroactively immediately after the
     record date for the determination of stockholders entitled to receive such
     rights or warrants.

          (iii) In case the Corporation shall, at any time or from time to time
     while any of the shares of Series D Preferred Stock are outstanding,
     distribute to all holders of shares of its Common Stock evidences of its
     indebtedness or securities or assets (excluding cash dividends payable out
     of consolidated earnings or retained earnings or dividends payable in
     shares of Common Stock) or rights or warrants to subscribe for securities
     of the Corporation or any of its subsidiaries (excluding those referred to
     in Section 8(c)(ii)), then in each such case the conversion rate shall be
     adjusted so that it shall equal the rate determined by multiplying the
     conversion rate in effect immediately prior to the date of such
     distribution by a fraction, the numerator of which shall be the current
     Market Price per share of the Common Stock on the record date referred to
     below, and the denominator of which shall be such current market price per
     share of the Common Stock less the then fair market value of the portion of
     the assets or evidences of indebtedness or securities or assets so
     distributed or of such subscription rights or warrants applicable to one
     share of Common Stock. Such adjustment shall become effective retroactively
     immediately after the record date for the determination of stockholders
     entitled to receive such distribution.

          (iv) The Corporation shall be entitled at its option to make such
     additional adjustments in the conversion rate, in addition to those
     required by subsections 8(c)(i), 8(c)(ii) and 8(c)(iii), as shall be
     necessary in order that any dividend or distribution in shares of stock,
     subdivision or combination of shares of Common Stock, issuance of rights or
     warrants, evidences of indebtedness or assets (other than cash dividends
     payable out of consolidated earnings or retained earnings) referred to
     above, shall not be taxable to the Holders of shares of Series D Preferred
     Stock.

          (v) In any case in which this Section 8(c) shall require that an
     adjustment be made retroactively immediately following a record date, the
     Corporation may elect to defer (but only for five (5) Business Days
     following the filing of the statement referred to in Section 8(c)(vii))
     issuing to the holder of any shares of this Series converted after such
     record date (A) the shares of Common Stock and other capital stock of the
     Corporation issuable upon such conversion over and above (B) the shares of
     Common Stock



                                      -9-


     and other capital stock of the Corporation issuable upon such conversion on
     the basis of the conversion rate prior to adjustment.

          (vi) Notwithstanding any other provisions of this Section 8(c), the
     Corporation shall not be required to make any adjustment of the conversion
     rate (A) in respect of any Special Dividend in which the holders of Series
     D Preferred Stock participate as provided in Section 2(c) or (B) unless
     such adjustment would require an increase or decrease of at least 1% in
     such rate (any lesser adjustment shall be carried forward and shall be made
     at the time of and together with the next subsequent adjustment which,
     together with any adjustment or adjustments so carried forward, shall
     amount to an increase or decrease of at least 1% in such rate).

          (vii) Whenever an adjustment in the conversion rate is required, the
     Corporation shall forthwith place on file with its Transfer Agent a
     statement signed by its Chief Executive Officer, Chief Financial Officer or
     a Vice President and by its Secretary, Assistant Secretary, Treasurer or
     Assistant Treasurer, stating the adjusted conversion rate determined as
     provided herein. Such statements shall set forth in reasonable detail such
     facts as shall be necessary to show the reason and the manner of computing
     such adjustment. Promptly after the adjustment of the conversion rate, the
     Corporation shall mail a notice thereof to each holder of shares of Series
     D Preferred Stock.

     (d) Reservation of Shares; etc. The Corporation shall at all times reserve
and keep available, free from preemptive rights, out of its authorized and
unissued stock, such number of shares of its Common Stock as shall from time to
time be sufficient to effect the conversion of all shares of the Series D
Preferred Stock from time to time outstanding, solely for the purpose of
effecting such conversion. The Corporation shall, from time to time, in
accordance with the laws of the State of Oklahoma, increase the authorized
number of shares of Common Stock if at any time the number of shares of
authorized and unissued Common Stock shall not be sufficient to permit the
conversion of all the then-outstanding shares of Series D Preferred Stock.

          (i) If any shares of Common Stock required to be reserved hereunder
     for purposes of conversion require registration with or approval of any
     governmental authority under any Federal or state law before such shares
     may be issued upon conversion, the Corporation shall, in good faith and as
     expeditiously as possible, cause such shares to be duly registered or
     approved as the case may be. If the Common Stock is listed on the New York
     Stock Exchange or any other national or foreign securities exchange, the
     Corporation shall, if permitted by the rules of such exchange, list and
     keep listed on such exchange, upon official notice of issuance, all shares
     of Common Stock issuable upon conversion of Series D Preferred Stock.



                                      -10-


          (ii) The Corporation will pay any and all taxes that may be payable in
     respect of the issuance or delivery of shares of Common Stock upon
     conversion of shares of Series D Preferred Stock pursuant hereto. The
     Corporation shall not, however, be required to pay any tax which may be
     payable in respect of any transfer involved in the issuance and delivery of
     shares of Common Stock in a name other than that in which the shares of
     Series D Preferred Stock so converted were registered and no such issuance
     or delivery shall be made unless and until the person requesting such
     issuance has paid to the Corporation the amount of any such tax or has
     established to the satisfaction of the Corporation that such tax has been
     paid.

     (e) Reclassifications, Consolidations, Mergers or Sales of Assets. In case
of (i) any reclassification or change of outstanding shares of Common Stock
(other than a change in par value or from par value to no par value or from no
par value to par value, or as a result of a subdivision or combination), (ii)
any consolidation or merger of the Corporation with one or more other
corporations (other than a consolidation or merger in which the Corporation is
the continuing corporation and which does not result in any reclassification or
change of outstanding shares of Common Stock issuable upon conversion of Series
D Preferred Stock), (iii) any sale or conveyance to another corporation or other
entity of all or substantially all of the property of the Corporation, or (iv)
any other transaction which would constitute a Change in Control of the
Corporation, then the Corporation, or such successor corporation or other
entity, as the case may be, shall make appropriate provision so that the holder
of each share of Series D Preferred Stock then outstanding shall have the right
to convert such share into the kind and amount of shares of stock or other
securities and property receivable upon such consolidation, merger, sale,
reclassification, change or conveyance by a holder of the number of shares of
Common Stock into which such shares of Series D Preferred Stock might have been
converted immediately prior to such consolidation, merger, sale,
reclassification, change or conveyance, subject to adjustment which shall be as
nearly equivalent as may be practicable to the adjustments provided for in
Section 8(c). The provisions of this paragraph shall apply similarly to
successive consolidations, mergers, sales or conveyances.

     9. Priority. The Series D Preferred Stock shall be senior in rank, both as
to dividends and as to distribution of assets upon any liquidation, dissolution
or winding-up of the affairs of the Corporation, to the Common Stock, or any
class of equity securities of the Corporation which by its terms are junior to
the Series D Preferred Stock, and shall not be junior in rank with respect to
any class or series of Preferred Stock that may be issued by the Corporation,
unless the Holders of 66 2/3 percent of the outstanding shares of the Series D
Preferred Stock shall consent to the creation, reclassification or authorization
of any class or series of the Corporation's capital stock ranking prior to the
Series D Preferred Stock as to dividends or as to distributions of assets upon
liquidation, dissolution or winding-up of the Corporation, whether voluntary or
involuntary, or any security convertible into shares of such class or series.



                                      -11-


     10. Notices. The Corporation shall provide notice to each Holder of any
action taken or proposed to be taken or any determination made by the
Corporation and/or the Shareholder under the terms of this Certificate of
Designations. Notice of any such action or determination by the Corporation
and/or the Shareholder and all other notices and other communications provided
for in this Certificate of Designations shall be delivered by facsimile and by
reputable overnight courier,

     (a) if to the Corporation, to:

                  ONEOK, Inc.
                  100 West Fifth Street
                  Tulsa, Oklahoma  74103
                  Facsimile:  (918) 588-7971
                  Attn:  Chief Executive Officer

      with a copy to:

                  ONEOK, Inc.
                  100 West Fifth Street
                  Tulsa, Oklahoma  74103
                  Facsimile:  (918) 588-7971
                  Attn:  General Counsel

or such other address as the Corporation shall have furnished to the Holders in
writing,

     (b) if to a Holder and/or the Shareholder, to the address and facsimile
number of such Holder listed on the Stock Books of the Corporation.

     11. Definitions. Certain capitalized terms are used herein as defined
below:

     "Affiliate" shall mean, with respect to any Person, any other Person that
directly or indirectly through one or more intermediaries controls or is
controlled by or is under common control with such Person. For the purposes of
this definition, "control," when used with respect to any particular Person,
means the power to direct the management and policies of such Person, directly
or indirectly, whether through the ownership of voting securities, by contract
or otherwise; and the terms "controlling" and "controlled" have meanings
correlative to the foregoing.

     "Beneficial Owner" (and, with correlative meanings, "Beneficially Own" and
"Beneficial Ownership") of any interest means a Person who, together with his,
her or its Affiliates, is or may be deemed a beneficial owner of such interest
for purposes of Rule 13d-3 or 13d-5 under the Securities Exchange Act of 1934,
as amended, or who, together with his, her,



                                      -12-


or its Affiliates, has the right to become such a beneficial owner of such
interest (whether such right is exercisable immediately or only after the
passage of time) pursuant to any agreement, arrangement or understanding, or
upon the exercise, conversion or exchange of any warrant, right or other
instrument, or otherwise.

     "Board" shall mean the Board of Directors of the Corporation in office at
the applicable time, as elected in accordance with the By-Laws of the
Corporation and with the Shareholder Agreement.

     "Business Day" means any day other than a Saturday, a Sunday, a day on
which the New York Stock Exchange is closed or a day on which state or federally
chartered banking institutions in New York, New York are not required to be
open.

     "By-Laws" shall mean the By-Laws of the Corporation, as they may be amended
from time to time.

     "Certificate of Designations" means this Certificate of Designations,
Powers, Preferences and Relative, Participating, Optional or other Rights, and
the Qualifications, Limitations or Restrictions Thereof, creating the Series D
Preferred Stock.

     "Certificate of Incorporation" shall mean the Certificate of Incorporation
of the Corporation, as it may be amended from time to time.

     "Change in Control" shall mean the occurrence of any one of the following
events:

     (1)  any Person (other than the Shareholder and/or its Affiliates) becoming
          the Beneficial Owner, directly or indirectly, 35% or more of the
          Securities entitled to vote generally in the election of directors,
          pursuant to the consummation of a merger, consolidation, sale of all
          or substantially all of the Corporation's assets, share exchange or
          similar form of corporate transaction involving the Corporation or any
          of its subsidiaries that requires the approval of the Corporation's
          shareholders, whether for such transaction or the issuance of
          securities in such transaction; provided, however, that the event
          described in this paragraph (1) shall not be deemed to be a Change in
          Control if it occurs as the result of any of the following
          acquisitions: (A) by any employee benefit plan sponsored or maintained
          by the Corporation or any Affiliate, or (B) by any underwriter
          temporarily holding Securities pursuant to an offering of such
          Securities;

     (2)  the consummation of a merger, consolidation, sale of all or
          substantially all of the Corporation's assets, share exchange or
          similar form of corporate transaction involving the Corporation or any
          of its subsidiaries that requires the ap-



                                      -13-


          proval of the Corporation's shareholders, whether for such transaction
          or the issuance of securities in such transaction, unless immediately
          following such transaction more than 50 percent of the total voting
          power of (x) the corporation resulting from such transaction, or (y)
          if applicable, the ultimate parent corporation that directly or
          indirectly has Beneficial Ownership of 100 percent of the securities
          eligible to elect directors of such resulting corporation, is
          represented by Securities entitled to vote generally in the election
          of directors that were outstanding immediately prior to such
          transaction (or, if applicable, shares into which such Securities were
          converted pursuant to such transaction), and such voting power among
          the holders of such Securities that were outstanding immediately prior
          to such transaction is in substantially the same proportion as the
          voting power of such Securities among the holders thereof immediately
          prior to such transaction; or

     (3)  the consummation of a plan of complete liquidation or dissolution of
          the Corporation.

     "Closing Price" for each Trading Day shall be the last sale price, regular
way, or, in case no such sale takes place on such day, the average of the
closing bid and asked prices, regular way, in either case as reported in the
principal consolidated transaction reporting system of the New York Stock
Exchange or, if the Common Stock is no longer listed or admitted to trading on
the New York Stock Exchange, as reported in the principal consolidated
transaction reporting system with respect to the principal national securities
exchange on which the Common Stock is then listed or admitted to trading or if
the Common Stock is no longer 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 date the Common Stock 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 a majority of the Board or, if on any such date no market
maker is making a market in such security, the fair value as determined in good
faith by a majority of the Board based upon the opinion of an independent
investment banking firm of recognized standing.

     "Common Stock" means the Common Stock of ONEOK, Inc.

     "Control Share Acquisition Statute" has the meaning specified in Section
3(a) above.

     "Corporation" has the meaning specified in the preamble.

     "Dividend Payment Date" has the meaning specified in Section 2(b) above.



                                      -14-


     "Dividend Period" means the applicable period from (and including) the
Issue Date to the end of the first fiscal quarter after the Issue Date, and each
fiscal quarter thereafter.

     "Holder" means a holder of record of a share or shares of Series D
Preferred Stock.

     "Issue Date" has the meaning specified in Section 2(a) above.

     "Liquidation Preference" has the meaning specified in Section 7 above.

     The "Market Price" for the Common Stock shall mean the average of the
Closing Prices for such Common Stock for the twenty (20) Trading Days
immediately prior to the date on which the Market Price is being determined;
provided, however, that in the event that the current per share market price of
the Common Stock is determined during a period following the announcement by the
Corporation of (a) a dividend or distribution on the Common Stock payable in
shares of Common Stock or securities convertible into Common Stock or (b) any
subdivision, combination or reclassification of the Common Stock and prior to
the expiration of 20 Trading Days after the ex-dividend date for such dividend
or distribution, or the record date for such subdivision, combination or
reclassification, then, and in each such case, the current per share market
price shall be appropriately adjusted to take into account ex-dividend trading
or the effects of such subdivision, combination or reclassification.

     "Parent" means Westar Energy, Inc., a Kansas corporation.

     "Person" means any individual, corporation, partnership, joint venture,
trust, unincorporated organization, government or any agency or political
subdivision thereof, or any other entity.

     "Redemption Date" has the meaning specified in Section 6.

     "Redemption Price" has the meaning specified in Section 5.

     "Securities" shall mean any securities of the Corporation.

     "Series D Preferred Stock" has the meaning specified in Section 1 above.

     "Shareholder" means Westar Industries, Inc., a Delaware corporation.

     "Shareholder Agreement" means the Shareholder Agreement, dated as of
January , 2003 among ONEOK, Parent and the Shareholder.

     "Shareholder Group" shall mean Parent, the Shareholder, any Affiliate of
the Shareholder and any Person with whom any Shareholder or any Affiliate of any
Shareholder is part of a 13D Group.



                                      -15-


     "Special Dividend" means a dividend declared or paid on the Common Stock in
respect of a recapitalization, spin-off, reorganization or other extraordinary
transaction of the Corporation.

     "Stock Books" means the stock transfer books of the Corporation relating to
its Common Stock and Preferred Stock.

     "Subsidiary" shall mean, with respect to any corporation (the "ultimate
parent") any other corporation, association, or other business entity of which
more than 50% of the shares of the voting stock are owned or controlled,
directly or indirectly, by the ultimate parent or one or more Subsidiaries of
the ultimate parent, or by the ultimate parent and one or more of its
Subsidiaries.

     "Surrender Date" has the meaning specified in Section 8(b)(ii) above.

     "Trading Day" shall mean a day on which the principal national securities
exchange on which the Common Stock is listed or admitted to trading is open for
the transaction of business.

     "Transfer" shall mean any sale, transfer, pledge, encumbrance or other
disposition to any Person.




                                      -16-




     IN WITNESS WHEREOF, ONEOK, INC. has caused this Certificate of Designations
to be made under the seal of the Corporation and signed and attested by the
undersigned officers of the Corporation this 3rd day of February, 2003.

                                   ONEOK, INC.


                                   By:      /s/ David L. Kyle
                                            -----------------------------------
                                            Name:    David L. Kyle
                                            Title:   Chairman, President and
                                                     Chief Executive Officer

(Corporate Seal)

Attest:


By:      /s/ Eric Grimshaw
         -----------------------------------------------
         Name:    Eric Grimshaw
         Title:   Vice President and Corporate Secretary



                                      -17-





                                                                      EXHIBIT 12


                            STOCK PURCHASE AGREEMENT


     This STOCK PURCHASE AGREEMENT (this "Agreement") is made as of February 5,
2003, by and among ONEOK, INC., an Oklahoma corporation (the "Company"), WESTAR
ENERGY, INC., a Kansas corporation ("Parent") and WESTAR INDUSTRIES, INC., a
Delaware corporation and a wholly-owned direct subsidiary of Parent (the
"Shareholder").

                              W I T N E S S E T H:


     WHEREAS, the Company, Parent and Shareholder previously entered into that
certain Transaction Agreement dated as of January 9, 2003 (the "Transaction
Agreement"), pursuant to which the Company recently conducted a public offering
(the "Offering") of shares of its common stock, $0.01 per share (the "Common
Stock") and certain other securities;

     WHEREAS, pursuant to the Transaction Agreement, the Company agreed to use a
portion of the proceeds of the Offering to repurchase from the Shareholder a
portion of the Series A Preferred Stock, par value $0.01 per share, of the
Company (the "Series A Preferred Stock");

     WHEREAS, the Offering was more successful, and generated a greater amount
of proceeds, than was originally contemplated by the parties, and the parties
desire for the Company to use a portion of such additional proceeds to
repurchase additional shares of the Series A Preferred Stock from the
Shareholder;

     WHEREAS, the Kansas Corporation Commission ("KCC") has previously ordered
the Parent and the Shareholder to sell some of their non-utility assets in an
effort to reduce the debt of the Parent and the Shareholder;

     WHEREAS, the repurchase of additional shares of Series A Preferred Stock by
the Company will assist the Parent and the Shareholder in complying with the
KCC's orders and allow Parent and Shareholder to repay indebtedness as ordered
by the KCC; and

     WHEREAS, the parties intend to accomplish such additional repurchase on
substantially the same terms and conditions as those described in the
Transaction Agreement.

     NOW, THEREFORE, in consideration of the mutual covenants and agreements set
forth herein and for other good and valuable consideration, the receipt and
sufficiency of which is hereby acknowledged, the parties hereto hereby agree as
follows:






                                    ARTICLE I

                            THE ADDITIONAL REPURCHASE


     The Company hereby repurchases (the "Additional Repurchase") from the
Shareholder, and the Shareholder hereby sells to the Company, 3,012,919 shares
of the Company's Series A Preferred Stock (the "Additional Repurchase Shares")
for an aggregate purchase price of $50,000,000 (the "Purchase Price"), all on
the same economic terms and conditions as provided in the Transaction Agreement
and as specified in the Closing Statement agreed to by the parties and delivered
concurrently herewith. The Shareholder hereby acknowledges receipt by wire
transfer of cash in the amount of the Purchase Price, and the Company hereby
acknowledges receipt from the Shareholder of a certificate representing the
Additional Repurchase Shares accompanied by duly executed stock powers assigning
the Additional Repurchase Shares in blank.


                                   ARTICLE II

                         REPRESENTATIONS AND WARRANTIES


     Section 2.1. Representations and Warranties of the Company. The Company
represents and warrants to the Shareholder as of the date hereof as follows:

          (a) The Company has been duly incorporated and is validly existing as
     a corporation in good standing under the laws of the State of Oklahoma and
     has all necessary corporate power and authority to enter into this
     Agreement and to carry out its obligations hereunder.

          (b) This Agreement has been duly and validly authorized by the Company
     and all necessary and appropriate action has been taken by the Company to
     execute and deliver this Agreement and to perform its obligations
     hereunder.

          (c) This Agreement has been duly executed and delivered by the Company
     and assuming due authorization and valid execution and delivery by Parent
     and the Shareholder, this Agreement is a valid and binding obligation of
     the Company, enforceable in accordance with its terms.

          (d) Other than any consents that have already been obtained, no
     consent, waiver, approval, authorization, exemption, registration, license
     or declaration is required to be made or obtained by the Company in
     connection with the (i) execution,



                                      -2-


     delivery or performance of this Agreement or (ii) the consummation of any
     of the transactions contemplated by this Agreement.

          (e) The execution and delivery by the Company of this Agreement and
     the performance of its obligations hereunder does not and will not (i)
     conflict with, or result in the breach of any provision of the constitutive
     documents of the Company; (ii) result in any violation, breach, conflict,
     default or event of default (or an event which with notice, lapse of time,
     or both, would constitute a default or event of default), or give rise to
     any right of acceleration or termination or any additional payment
     obligation, under the terms of any material contract, agreement or permit
     to which the Company is a party or by which the Company's assets or
     operations are bound or affected; or (iii) violate, in any material
     respect, any federal, state, local or foreign law, statute, ordinance,
     rule, regulation, judgment, injunction, order or decree ("Law") applicable
     to the Company.

     Section 2.2. Representations and Warranties of the Parent and the
Shareholder. Each of Parent and the Shareholder represents and warrants to the
Company as of the date hereof as follows:

          (a) Each of Parent and the Shareholder has been duly incorporated and
     is validly existing as a corporation in good standing under the laws of its
     state of incorporation and has all necessary corporate power and authority
     to enter into this Agreement and to carry out its obligations hereunder.

          (b) This Agreement has been duly and validly authorized by each of
     Parent and the Shareholder and all necessary and appropriate action has
     been taken by each of Parent and the Shareholder to execute and deliver
     this Agreement and to perform its obligations hereunder.

          (c) This Agreement has been duly executed and delivered by each of
     Parent and the Shareholder and assuming due authorization and valid
     execution and delivery by the Company, this Agreement is a valid and
     binding obligation of each of Parent and the Shareholder, enforceable in
     accordance with its terms.

          (d) Other than any consents that have already been obtained, no
     consent, waiver, approval, authorization, exception, registration, license
     or declaration, including any additional consents or approvals of the KCC,
     is required to be made or obtained by either Parent or the Shareholder in
     connection with (i) the execution, delivery or performance of this
     Agreement or (ii) the consummation of any of the transactions contemplated
     by this Agreement.



                                      -3-


          (e) The execution and delivery by Parent and the Shareholder of this
     Agreement and the performance of its obligations hereunder does not and
     will not (i) conflict with, or result in the breach of any provision of the
     constitutive documents of either Parent or the Shareholder; (ii) result in
     any violation, breach, conflict, default or event of default (or an event
     which with notice, lapse of time, or both, would constitute a default or
     event of default), or give rise to any right of acceleration or termination
     or any additional payment obligation, under the terms of any material
     contract, agreement or permit to which either Parent or the Shareholder is
     a party or by which either Parent or the Shareholder's assets or operations
     are bound or affected; (iii) violate, in any material respect, any Law
     applicable to either Parent or the Shareholder; or (iv) violate any order
     of the KCC.

          (f) Upon consummation of the Additional Repurchase, the Company will
     have valid and marketable title to the Additional Repurchase Shares, free
     and clear of all title defects, security interests, liens or encumbrances
     of any nature whatsoever.


                                   ARTICLE III

                                  MISCELLANEOUS


     Section 3.1. Successors and Assigns. This Agreement shall be binding upon,
shall inure to the benefit of and shall be enforceable by the Company, on the
one hand, and by Parent and the Shareholder, on the other hand, and their
respective successors and permitted assigns, and no such term or provision is
for the benefit of, or intended to create any obligations to, any other Person.

     Section 3.2. Notices. Except as otherwise provided in this Agreement, all
notices, requests, claims, demands, waivers and other communications hereunder
shall be in writing and shall be deemed to have been duly given when delivered
by hand, when delivered personally or by courier, three days after being
deposited in the mail (registered or certified mail, postage prepaid, return
receipt requested), or when received by facsimile transmission if promptly
confirmed by one of the foregoing means, as follows:

         If to the Company:

                  ONEOK, Inc.
                  100 W. Fifth Street
                  Tulsa, Oklahoma
                  Attention:  Chief Executive Officer
                  Fax: (918) 588-7961



                                      -4-


         with a copy to:

                  ONEOK, Inc.
                  100 W. Fifth Street
                  Tulsa, Oklahoma
                  Attention:  General Counsel
                  Fax: (918) 588-7971

         If to Parent:

                  Westar Energy, Inc.
                  818 Kansas Avenue
                  Topeka, Kansas 66612
                  Attention:  President
                  Fax: (785) 575-8061

         with a copy to:

                  Westar Energy, Inc.
                  818 Kansas Avenue
                  Topeka, Kansas 66612
                  Attention:  Corporate Secretary
                  Fax: (785) 575-1936

         If to the Shareholder:

                  Westar Industries, Inc.
                  818 Kansas Avenue
                  Topeka, Kansas 66612
                  Attention:  President
                  Fax: (785) 575-8061

         with a copy to:

                  Westar Industries, Inc.
                  818 Kansas Avenue
                  Topeka, Kansas 66612
                  Attention:  Corporate Secretary
                  Fax: (785) 575-1936

or to such other address or facsimile number as either party may, from time to
time, designate in a written notice given in a like manner.



                                      -5-


     Section 3.3. Applicable Law. THIS AGREEMENT SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF OKLAHOMA WITHOUT
GIVING EFFECT TO PRINCIPLES OF CONFLICTS OF LAW.

     Section 3.4. Headings. The descriptive headings of the several sections in
this Agreement are for convenience only and do not constitute a part of this
Agreement and shall not be deemed to limit or affect in any way the meaning or
interpretation of this Agreement.

     Section 3.5. Integration. This Agreement and the other writings referred to
herein or delivered pursuant hereto which form a part hereof contain the entire
understanding of the parties with respect to its subject matter. This Agreement
supersedes all prior agreements and understandings between the parties with
respect to its subject matter. There are no restrictions, agreements, promises,
representations, warranties, covenants or undertakings with respect to its
subject matter other than those expressly set forth or referred to herein.

     Section 3.6. Severability. If any term or provision of this Agreement or
any application thereof shall be declared or held invalid, illegal or
unenforceable, in whole or in part, whether generally or in any particular
jurisdiction, such provision shall be deemed amended to the extent, but only to
the extent, necessary to cure such invalidity, illegality or unenforceability,
and the validity, legality and enforceability of the remaining provisions, both
generally and in every other jurisdiction, shall not in any way be affected or
impaired thereby.

     Section 3.7. Consent to Jurisdiction. In connection with any suit, claim,
action or proceeding arising out of this Agreement, Parent, the Shareholder and
the Company each hereby consent to the in personam jurisdiction of the United
States federal courts and state courts located in Tulsa, Oklahoma; the
Shareholder and the Company each agree that service in the manner set forth in
Section 3.2 hereof shall be valid and sufficient for all purposes; and the
Shareholder and the Company each agree to, and irrevocably waive any objection
based on forum non conveniens or venue, appear in any United States federal
court state court located in Tulsa, Oklahoma.

     Section 3.8. Counterparts. This Agreement may be executed by the parties
hereto in two or more counterparts, each of which shall be deemed an original,
but all of which together shall constitute one and the same instrument.




                                      -6-



     IN WITNESS WHEREOF, the Company, Parent and the Shareholder have caused
this Agreement to be duly executed by their respective authorized officers as of
the date set forth at the head of this Agreement.

                              ONEOK, INC.


                              By:    /s/ David L. Kyle
                                     ------------------------------------------
                                     Name:    David L. Kyle
                                     Title:   Chairman, Chief Executive Officer
                                              and President


                              WESTAR ENERGY, INC.


                              By:    /s/ James S. Haines, Jr.
                                     ------------------------------------------
                                     Name:     James S. Haines, Jr.
                                     Title:    Chief Executive Officer and
                                               President


                              WESTAR INDUSTRIES, INC.


                              By:    /s/ James S. Haines, Jr.
                                     ------------------------------------------
                                     Name:    James S. Haines, Jr.
                                     Title:   Chief Executive Officer and
                                              President





                                      -7-