Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
CHEATWOOD CHRIS J
   2. Issuer Name and Ticker or Trading Symbol
PIONEER NATURAL RESOURCES CO [PXD] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
EVP, BD & Technology
(Last)
(First)
(Middle)
5205 N. O'CONNOR BLVD., SUITE 200		 3. Date of Earliest Transaction (Month/Day/Year)
09/02/2010
(Street)

IRVING, TX 75039		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock               4,500 I by Children
Common Stock               130 (1) I 401(k)
Common Stock 09/02/2010   M   1,400 A $ 24.25 86,359 D  
Common Stock 09/02/2010   M   3,333 A $ 25.58 89,692 D  
Common Stock 09/02/2010   S   100 D $ 61.21 89,592 D  
Common Stock 09/02/2010   S   158 D $ 61.2173 89,434 D  
Common Stock 09/02/2010   S   100 D $ 61.22 89,334 D  
Common Stock 09/02/2010   S   200 D $ 61.225 89,134 D  
Common Stock 09/02/2010   S   242 D $ 61.23 88,892 D  
Common Stock 09/02/2010   S   200 D $ 61.235 88,692 D  
Common Stock 09/02/2010   S   100 D $ 61.24 88,592 D  
Common Stock 09/02/2010   S   200 D $ 61.25 88,392 D  
Common Stock 09/02/2010   S   100 D $ 61.26 88,292 D  
Common Stock 09/02/2010   S   100 D $ 61.18 88,192 D  
Common Stock 09/02/2010   S   234 D $ 61.2075 87,958 D  
Common Stock 09/02/2010   S   400 D $ 61.21 87,558 D  
Common Stock 09/02/2010   S   79 D $ 61.22 87,479 D  
Common Stock 09/02/2010   S   200 D $ 61.2225 87,279 D  
Common Stock 09/02/2010   S   220 D $ 61.2336 87,059 D  
Common Stock 09/02/2010   S   200 D $ 61.235 86,859 D  
Common Stock 09/02/2010   S   200 D $ 61.25 86,659 D  
Common Stock 09/02/2010   S   300 D $ 61.26 86,359 D  
Common Stock 09/02/2010   S   300 D $ 61.28 86,059 D  
Common Stock 09/02/2010   S   200 D $ 61.2875 85,859 D  
Common Stock 09/02/2010   S   400 D $ 61.29 85,459 D  
Common Stock 09/02/2010   S   191 D $ 61.3021 85,268 D  
Common Stock 09/02/2010   S   200 D $ 61.305 85,068 D  
Common Stock 09/02/2010   S   9 D $ 61.31 85,059 D  
Common Stock 09/02/2010   S   100 D $ 61.32 84,959 D  

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option (right to buy) $ 24.25 09/02/2010   M     1,400 02/18/2006 02/18/2011 Common Stock 1,400 $ 24.25 0 D  
Non-Qualified Stock Option (right to buy) $ 25.58 09/02/2010   M     3,333 08/19/2006 08/19/2011 Common Stock 3,333 $ 25.58 0 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
CHEATWOOD CHRIS J
5205 N. O'CONNOR BLVD., SUITE 200
IRVING, TX 75039		       EVP, BD & Technology  

Signatures

 Mark H. Kleinman, Attorney-in-Fact For Chris J. Cheatwood   09/07/2010
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Consists of shares beneficially owned as a result of reporting person's ownership of units in the Pioneer Natural Resources USA, Inc. 401(k)

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