Item 7.01. Regulation FD Disclosure.

On May 27, 2009, Pioneer Natural Resources Company (the "Company") will post an updated Investor Presentation, titled "Deutsche Bank Energy, Utilities & Power Conference," on the Company's website, www.pxd.com. A copy of the presentation can be reviewed at the website by first selecting "Investors," then "Investor Presentations."

S I G N A T U R E

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

PIONEER NATURAL RESOURCES COMPANY

By: /s/ Frank W. Hall Frank W. Hall, Vice President and Chief Accounting Officer

Dated: May 27, 2009