UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): September 26, 2001 PIONEER NATURAL RESOURCES COMPANY ----------------------------------- (Exact name of Registrant as specified in its charter) DELAWARE 1-13245 75-2702753 -------------------------------- ------------ --------------------- (State or other jurisdiction of Commission (I.R.S. Employer incorporation or organization) File Number Identification Number) 5205 N. O'CONNOR BLVD., SUITE 1400, IRVING, TEXAS 75039 ------------------------------------------------- ---------- (Address of principal executive offices) (Zip code) Registrant's Telephone Number, including area code : (972) 444-9001 Not applicable (Former name, former address and former fiscal year, if changed since last report) PIONEER NATURAL RESOURCES COMPANY TABLE OF CONTENTS Page Item 7. Financial Statements, Pro Forma Financial Information and Exhibits: (c) Exhibits.......................................... 3 Item 9. Regulation FD Disclosure............................... 3 Signatures...................................................... 4 Exhibit Index................................................... 5 2 PIONEER NATURAL RESOURCES COMPANY ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS (c) Exhibits 99.1 News Release dated September 26, 2001 ITEM 9. REGULATION FD DISCLOSURE On September 26, 2001, Pioneer Natural Resources Company issued a news release updating its third quarter 2001 outlook based on current expectations and partial quarter actual results. The news release is attached hereto as an exhibit and incorporated by reference herein. 3 PIONEER NATURAL RESOURCES COMPANY S I G N A T U R E S 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 Date: September 26, 2001 By: /s/ RICH DEALY ------------------------------------- Rich Dealy Vice President and Chief Accounting Officer 4 PIONEER NATURAL RESOURCES COMPANY EXHIBIT INDEX Exhibit No. Description 99.1* News Release dated September 26, 2001 ------------- * filed herewith 5