NOTIFICATION OF REMOVAL FROM LISTING AND/OR REGISTRATION UNDER SECTION 12(b) OF THE SECURITIES EXCHANGE ACT OF 1934.
UNITED STATES
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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 25
NOTIFICATION OF REMOVAL FROM LISTING AND/OR REGISTRATION
UNDER SECTION 12(b) OF THE SECURITIES EXCHANGE ACT OF 1934.
Commission File Number 001-13245
Issuer: PIONEER NATURAL RESOURCES CO
Exchange: NEW YORK STOCK EXCHANGE LLC
(Exact name of Issuer as specified in its charter, and name of Exchange where security is listed and/or registered)
Address: 200 WILLIAMS SQUARE WEST
5205 N OCONNOR BLVD
IRVING TEXAS 75039
Telephone number: 9,724,449,001
(Address, including zip code, and telephone number, including area code, of Issuer's principal executive offices)
RIGHTS TO PURCHASE SERIES A JUNIOR PARTICIPATING PREFERRED STOCK, PAR VALUE $.01 PER SHARE
(Description of class of securities)
Please place an X in the box to designate the rule provision relied upon to strike the class of securities from listing and registration:
17 CFR 240.12d2-2(a)(1)
17 CFR 240.12d2-2(a)(2)
17 CFR 240.12d2-2(a)(3)
17 CFR 240.12d2-2(a)(4)
Pursuant to 17 CFR 240.12d2-2(b), the Exchange has complied with its rules to strike the class of securities from listing and/or withdraw registration on the Exchange. 1
Pursuant to 17 CFR 240.12d2-2(c), the Issuer has complied with its rules of the Exchange and the requirements of 17 CFR 240.12d-2(c) governing the voluntary withdrawal of the class of securities from listing and registration on the Exchange.
Pursuant to the requirements fo the Securities Exchange Act of 1934, NEW YORK STOCK EXCHANGE LLC certifies that it has reasonable grounds to believe that it meets all of the requirements for filing the Form 25 and has caused this notification to be signed on its behalf by the undersigned duly authorized person.
2011-08-17 By Ed Mecabe Managing Director
Date Name Title
1 Form 25 and attached Notice will be considered compliance with the provisions of 17 CFR 240.19d-1 as applicable. See General Instructions.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
The New York Stock Exchange hereby notifies the SEC
 of its intention to remove the entire class of the
stated securities from listing and registration on
the Exchange at the opening of business on August 29,
2011, pursuant to the provisions of Rule 12d2-2 (a).

[ X ] 17 CFR 240.12d2-2 (a) (4) That all rights
pertaining to the entire class of this security were
extinguished on July 31, 2011.

Pursuant to the terms of the Rights of Pioneer Natural
Resources Company, the Rights expired and became null
and void on July 31, 2011.

The Exchange also notifies the Securities and Exchange
Commission that as a result of the above indicated
conditions this security was suspended on August 1, 2011.

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