Document:

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                                                                  EXHIBIT 10.3

                            CROSS TIMBERS OIL COMPANY

             AMENDMENT TO AGREEMENT FOR GRANT OF PERFORMANCE SHARES
             ------------------------------------------------------

         This Amendment to Agreement for Grant of Performance Shares (this
"Amendment"), dated as of May 24, 2001, is entered into by and between CROSS
TIMBERS OIL COMPANY, a Delaware company (the "Company"), and BOB R. SIMPSON (the
"Executive").

                                   WITNESSETH:
                                   -----------

         WHEREAS, the Company and the Executive entered into that certain
Agreement for Grant of Performance Shares (the "Agreement") dated as of February
20, 2001, to provide that Performance Shares would be granted to the Executive
in the event of a Change in Control of the Company; and

         WHEREAS, the Company and the Executive desire to amend the Agreement.

         NOW, THEREFORE, for and in consideration of the mutual promises,
covenants, and obligations contained herein, the Company and the Executive agree
as follows:

1.   Section 2.1 is amended to delete the reference to "40,000" in clause (i)
     and to insert in lieu thereof "45,000".

2.   Section 2.1 is amended to delete the last sentence of the first paragraph
     (which begins "Provided, however, that . . . .") in its entirety and to
     insert in lieu thereof the following sentence:

         "The number of Performance Shares calculated in accordance with the
         preceding sentence shall be reduced (but not below zero) by any
         Performance Shares granted to the Executive under the Plan after the
         date of this Agreement but prior to the date of the Change in Control
         which have not been forfeited by the Executive prior to or on the date
         of the Change in Control; provided, however, that the Compensation
         Committee or other committee with authority to grant awards under the
         Plan may designate from time to time that certain Performance Shares
         granted after the date of this Agreement shall not reduce the number of
         Performance Shares to be granted immediately prior to a Change in
         Control under this Section 2.1."
                            -----------

3.   Section 2.2 is amended to delete the references to "40,000" and to insert
     in lieu thereof "45,000", and to delete the reference to "60,000" and to
     insert in lieu thereof "67,500".

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         This Amendment will be effective as to all grants made on or after May
24, 2001.

         Except as amended herein, all other terms and provisions of the
Agreement shall remain in full force and effect.

         Defined terms not otherwise defined herein shall have the meaning set
forth in the Agreement.

     IN WITNESS WHEREOF, the parties have caused this Amendment to be executed
and delivered as of the day and year first above written.

                            CROSS TIMBERS OIL COMPANY

                            By:  ________________________________
                            Name:  Robert C. Myers
                            Title: Vice President-Human Resources

                            EXECUTIVE

                            ------------------------------------
                            Bob R. Simpson<PAGE>

                                                                  EXHIBIT 10.4

                            CROSS TIMBERS OIL COMPANY

             AMENDMENT TO AGREEMENT FOR GRANT OF PERFORMANCE SHARES
             ------------------------------------------------------

         This Amendment to Agreement for Grant of Performance Shares (this
"Amendment"), dated as of May 24, 2001, is entered into by and between CROSS
TIMBERS OIL COMPANY, a Delaware company (the "Company"), and STEFFEN E. PALKO
(the "Executive").

                                   WITNESSETH:
                                   -----------

         WHEREAS, the Company and the Executive entered into that certain
Agreement for Grant of Performance Shares (the "Agreement") dated as of February
20, 2001, to provide that Performance Shares would be granted to the Executive
in the event of a Change in Control of the Company; and

         WHEREAS, the Company and the Executive desire to amend the Agreement.

         NOW, THEREFORE, for and in consideration of the mutual promises,
covenants, and obligations contained herein, the Company and the Executive agree
as follows:

1.   Section 2.1 is amended to delete the reference to "20,000" in clause (i)
     and to insert in lieu thereof "25,000".

2.   Section 2.1 is amended to delete the last sentence of the first paragraph
     (which begins "Provided, however, that . . . .") in its entirety and to
     insert in lieu thereof the following sentence:

         "The number of Performance Shares calculated in accordance with the
         preceding sentence shall be reduced (but not below zero) by any
         Performance Shares granted to the Executive under the Plan after the
         date of this Agreement but prior to the date of the Change in Control
         which have not been forfeited by the Executive prior to or on the date
         of the Change in Control; provided, however, that the Compensation
         Committee or other committee with authority to grant awards under the
         Plan may designate from time to time that certain Performance Shares
         granted after the date of this Agreement shall not reduce the number of
         Performance Shares to be granted immediately prior to a Change in
         Control under this Section 2.1."
                            -----------

3.   Section 2.2 is amended to delete the references to "20,000" and to insert
     in lieu thereof "25,000", and to delete the reference to "30,000" and to
     insert in lieu thereof "37,500".

<PAGE>

         This Amendment will be effective as to all grants made on or after May
24, 2001.

         Except as amended herein, all other terms and provisions of the
Agreement shall remain in full force and effect.

         Defined terms not otherwise defined herein shall have the meaning set
forth in the Agreement.

     IN WITNESS WHEREOF, the parties have caused this Amendment to be executed
and delivered as of the day and year first above written.

                            CROSS TIMBERS OIL COMPANY

                            By:  ________________________________
                            Name:  Robert C. Myers
                            Title: Vice President-Human Resources

                            EXECUTIVE

                            ____________________________________
                            Steffen E. Palko<PAGE>

                                                                    EXHIBIT 10.5

                            CROSS TIMBERS OIL COMPANY

             AMENDMENT TO AGREEMENT FOR GRANT OF PERFORMANCE SHARES
             ------------------------------------------------------

         This Amendment to Agreement for Grant of Performance Shares (this
"Amendment"), dated as of May 24, 2001, is entered into by and between CROSS
TIMBERS OIL COMPANY, a Delaware company (the "Company"), and LOUIS G. BALDWIN
(the "Executive").

                                   WITNESSETH:
                                   -----------

         WHEREAS, the Company and the Executive entered into that certain
Agreement for Grant of Performance Shares (the "Agreement") dated as of February
20, 2001, to provide that Performance Shares would be granted to the Executive
in the event of a Change in Control of the Company; and

         WHEREAS, the Company and the Executive desire to amend the Agreement.

         NOW, THEREFORE, for and in consideration of the mutual promises,
covenants, and obligations contained herein, the Company and the Executive agree
as follows:

1.  Section 2.1 is amended to delete the reference to "5,000" in clause (i) and
    to insert in lieu thereof "8,000".

2.  Section 2.1 is amended to delete the last sentence of the first paragraph
    (which begins "Provided, however, that . . . .") in its entirety and to
    insert in lieu thereof the following sentence:

         "The number of Performance Shares calculated in accordance with the
         preceding sentence shall be reduced (but not below zero) by any
         Performance Shares granted to the Executive under the Plan after the
         date of this Agreement but prior to the date of the Change in Control
         which have not been forfeited by the Executive prior to or on the date
         of the Change in Control; provided, however, that the Compensation
         Committee or other committee with authority to grant awards under the
         Plan may designate from time to time that certain Performance Shares
         granted after the date of this Agreement shall not reduce the number of
         Performance Shares to be granted immediately prior to a Change in
         Control under this Section 2.1. Further, the special performance share
                            -----------
         grant provided under Section 2.3 below shall not reduce the number of
                              -----------
         Performance Shares to be granted immediately prior to a Change in
         Control under this Section 2.1."
                            -----------

<PAGE>

3.  Section 2.2 is amended to delete the references to "5,000" and to insert in
    lieu thereof "8,000", and to delete the reference to "7,500" and to insert
    in lieu thereof "12,000".

         This Amendment will be effective as to all grants made on or after May
24, 2001.

         Except as amended herein, all other terms and provisions of the
Agreement shall remain in full force and effect.

         Defined terms not otherwise defined herein shall have the meaning set
forth in the Agreement.

    IN WITNESS WHEREOF, the parties have caused this Amendment to be executed
and delivered as of the day and year first above written.

                                   CROSS TIMBERS OIL COMPANY

                                   By:  ___________________________________
                                   Name:  Robert C. Myers
                                   Title: Vice President - Human Resources

                                   EXECUTIVE

                                   ________________________________________
                                   Louis G. Baldwin

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