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): December 20, 2001 PARKER & PARSLEY 88-B, L.P. (Exact name of Registrant as specified in its charter) Delaware 33-19659-02 75-2240121 - ---------------------------------- ------------- --------------------- (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) Parker & Parsley 88-B, L.P. Item 2. Disposition of Assets On December 20, 2001, the limited partners of the registrant approved the previously announced merger of the registrant with and into Pioneer Natural Resources USA, Inc. ("Pioneer USA"), with Pioneer USA surviving. The merger occurred on December 20, 2001. As a result of the merger, the limited partners of the registrant received common stock, par value $.01 per share, of Pioneer Natural Resources Company ("Pioneer"). The terms and provisions of the merger have been previously reported in the proxy statement/prospectus dated October 12, 2001, forming a part of Pioneer's registration statement on Form S-4 (Commission File No. 333-59094). 2 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. PARKER & PARSLEY 88-B, L.P. By: Pioneer Natural Resources USA, Inc. Managing General Partner Date: December 21, 2001 By: /s/ Rich Dealy ------------------------------------ Rich Dealy Vice President and Chief Accounting Officer 3